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Open Access Article
1 - Deposition of magnesium nitride thin films on stainless steel-304 substrates by using a plasma focus device
Amir Hoshang Ramezani Maryam Habibi Mahmood Ghoranneviss -
Open Access Article
2 - Metal ions binding study on human growth hormone by isothermal titration calorimetric method
A.A. Saboury MS. Atri -
Open Access Article
3 - An ab initio study of metalated CMP,UMP& dTMP at HF level:Bond energies and isotropic NMR shielding of atoms
M.A Seyed Sajjadi R. Sayadi G. Ghasem KH. Kalateh -
Open Access Article
4 - Serological evaluation of effect of magnesium sulfate on renal function after kidney I/R in rat
Asghari, A., Jamshidi, N., Neshat, M., Mortazavi, P. .Ischemia reperfusion is a Cellular damage that occurs on return of blood to the ischemic tissue. In this study the preventive effects of magnesium sulfate on complications induced by ischemia reperfusion was investigated. In this study, 25 male Wistar rats were us MoreIschemia reperfusion is a Cellular damage that occurs on return of blood to the ischemic tissue. In this study the preventive effects of magnesium sulfate on complications induced by ischemia reperfusion was investigated. In this study, 25 male Wistar rats were used randomly divided into 5 groups of 5.The Sham group: The group has not received any medication and after only a week, blood sample was collected. The Control group (IR): The group has not received any medication before ischemia reperfusion. After a week the abdominal cavity was opened and a renal vessel were closed with non-traumatic forceps and after 45 min were released, then 8 hours later blood sample was collected. The third group (25mg/kg): This­ group was administrated orally with magnesium sulfate (25 mg/kg) for a week and after a week the abdominal cavity was opened, and renal vessels were closed with non-traumatic forceps and after 45 min were released then 8 hours later blood sample was collected. The forth group (50mg/kg): The group was administrated orally with magnesium sulfate(50mg/kg) for a week, and after a week the abdominal cavity was opened, and renal vessels were closed with non-traumatic forceps and after 45 min were released, then 8 hours later, blood sample was collected. The fifth group (100mg/kg): The group was administrated orally with magnesium sulfate (100mg/kg) for a week, and the abdominal cavity was opened after a week, and renal vessels were closed with non-traumatic forceps and after 45 min were released, then 8 hours later, blood sample was collected. At day zero (before drug administration) and after the end of ischemia-reperfusion and 8 hours later, blood samples were collected and serum creatinine and BUN levels were examined. Data was analyzed statistically (P<0.05). The result of this study shows that serum BUN and creatinine levels, in pretreated groups with Magnesium sulfate in contrast with untreated groups are lower. Consequently Magnesium sulfate could prevent ischemia-reperfusion induced injury to the kidney. Manuscript profile -
Open Access Article
5 - Effects of magnesium sulfate on atherogenic indices in cholestatic male rats using Bile duct ligation method
Eshraghi, T., Eidi, A., Mortazavi, P., Asghari, A., Tavangar, S.M. .Cholestasis is defined as a decrease in bile flow due to impaired secretion by hepatocytes or to obstruction of bile flow through intra or extrahepatic bile ducts that leads to retention of bile acids, bilirubin and cholesterol. Magnesium, the second most abundant intra MoreCholestasis is defined as a decrease in bile flow due to impaired secretion by hepatocytes or to obstruction of bile flow through intra or extrahepatic bile ducts that leads to retention of bile acids, bilirubin and cholesterol. Magnesium, the second most abundant intracellular cation, plays an essential physiological role in many functions of the body. The aim of this study was evaluating the effects of magnesium sulfate on atherogenic indices in cholestatic male Wistar rats. In this experimental study, 81 male Wistar rats were randomly allocated into 9 groups. Bile duct ligation was done by standard method. MgSo4 (0.05, 0.1 and 0.2 g/kg bw) was administered intragastrically, once a day, for 28 consecutive days. Serum samples were collected and serum lipid profile was measured using standard methods. Then atherogenic indices were calculated. Cholestasis led to a significant increase in atherogenic indices and treatment of cholestatic rats with magnesium sulfate significantly reduced atherogenic indices.Magnesium sulfate may improve serum lipid profile and reduce atherogenic indices in cholestatic rats by reducing oxidative stress and increasing the activity of enzymes involved in the metabolism of lipoproteins. Manuscript profile -
Open Access Article
6 - Three years effect of iron and magnesium nano-particles on the stability of aggregates and some soil chemical properties
Elahe Daraei Hossein Bayat Pouya ZamaniLittle is known about the long term effects of nanoparticles on soil properties. Therefore, the objective of this study was to investigate the three years effects of nanoparticles on aggregate stability and some of the soil chemical properties. Different amounts (1, 3 a MoreLittle is known about the long term effects of nanoparticles on soil properties. Therefore, the objective of this study was to investigate the three years effects of nanoparticles on aggregate stability and some of the soil chemical properties. Different amounts (1, 3 and 5 percentage by weight) of two types of nanoparticle of metal oxides, MgO and Fe3O4 were mixed with a loamy soil in three replications and their possible effects on different properties of the soil after three years were investigated. The results showed that application of nanoparticles, increased the pH of the soil from 7.7 in the control to 8.1- 9.3 and the electrical conductivity from 0.31 in the control to 0.34 -0.56 dSm-1, due to the increase in the alkali cations. The percentage of calcium carbonate increased from 19.75% in the control to 20.5-22.7% due to the accumulation of nanoparticles in the soil, with the highest increase in three variables with 5% magnesium nano oxide. 3% nano iron oxide significantly increased the cation exchange capacity from 23.50 in the control to 24.28 cmolc/kgsoil. Also the nanoparticles increased the mean weight diameter, due to their high specific surface area, with the greater effect of magnesium nano oxide (increased from 33 to 1242 percentage compared to the control) than iron nano oxide (increased from 97 to 173 percentage compared to the control). In general, the results of this study showed that, nanoparticles with specific physico-chemical properties can affect some properties of soil. Manuscript profile -
Open Access Article
7 - One –Pot Synthesis of Polyhydroquinoline Derivatives via Hantzsch Condensation Reaction Using Nanosized Magnesium Oxide as Heterogeneous Catalyst
Hakimeh Mirzaee Ahmad Izadyar Abolghsem Davoodnia Hoseyn Eshghi -
Open Access Article
8 - A Brief Study of Magnesium-Zinc Alloy Scaffolds Performance
Z. S Seyedraoufi -
Open Access Article
9 - Investigation of Mechanical Property and Microstructure of Nanocomposite AZ31/SiC Fabricated by Friction Stir Process
ahmad haghani Sayed Hassan Nourbakhsh Mehdi Jahangiri -
Open Access Article
10 - Recycling of Magnesium Machining Chips via Shear Consolidation Processing
Reza Abdi Behnagh Peyman Mashhadi Keshtiban Hadi Abdollahi -
Open Access Article
11 - The Effect of Sintering and Compaction Conditions on the Microstructure and Properties of AZ31 Magnesium Alloy
amin saghafi Seyed Ehsan Eftekhari Shahri Hossein Jamshidi Mohammad Kazem Salari Razieh Khoshhal -
Open Access Article
12 - Protective effect of nano magnesium oxide on renal ischemia/reperfusion injury on serum factors in male Wistar rats
Marzieh Minaei اکرم عیدی Pejman Mortazavi Ahmad AsghariBackground & Aim: In recent years, nanotechnology has produced new forms of materials that are more effective than their predecessors. Magnesium plays a key role in many biological processes. The aim of this study was to investigate the effects of nano magnesium oxide ( MoreBackground & Aim: In recent years, nanotechnology has produced new forms of materials that are more effective than their predecessors. Magnesium plays a key role in many biological processes. The aim of this study was to investigate the effects of nano magnesium oxide (Nano-MgO) on renal ischemia/reperfusion (I/R) as a common complication of renal vascular surgery or renal transplantation in a male rat model. Materials & Methods: In this study, Induction of I/R injury was done through clamping left renal pedicle for 20 min. Animals were administrated with Nano-MgO (1.25, 2.5 and 5 mg/kg) for 30 days by gavage and then blood samples were collected and changes in serum albumin, total protein, urea and creatinine were examined and the data were statistically analyzed (p <0.05). Results: Our findings showed that Nano-MgO administration to renal I/R injury rats significantly attenuates serum creatinine and urea levels. Also, administration of Nano-MgO increased serum albumin and total protein levels. Conclusion: The Nano-MgO administration preserves renal function and As a potent vasodilator, Nano-MgO may have been able to reduce kidney damage following ischemia-reperfusion induction. Manuscript profile -
Open Access Article
13 - Biosynthesis of Magnesium Oxide Nanoparticles by E. hirae isolated from traditional yogurt in Rafsanjan, Iran.
Ozra Hosseini-Naveha Ashraf Kariminik Shahla Soltani-Nezhad Enayatollah SheikhhosseiniThere is a lot of evidence about the beneficial biological effects of probiotics in food and dairy products. Antimicrobial properties, ability to produce biosurfactant and biosynthesis of nanoparticles are among the significant effects of these organisms. The aim of thi MoreThere is a lot of evidence about the beneficial biological effects of probiotics in food and dairy products. Antimicrobial properties, ability to produce biosurfactant and biosynthesis of nanoparticles are among the significant effects of these organisms. The aim of this research is the biosynthesis of magnesium oxide nanoparticles by Enterococcus hirai from traditional yogurt. MRS agar culture medium was used to isolate probiotics. Biosurfactant-producing isolates were examined in terms of hemolysis, crude Oil Spreading Assay, Drop Collapse Assay and emulsification index, the best isolate for the production of magnesium oxide nanoparticles, size, antioxidant activity, FTIR and antibacterial effects were evaluated and identified by PCR. 9 isolates had probiotic properties, isolate L11 was selected with higher biosurfactant production ability. The antibacterial property of the produced biosurfactant was shown against Gram-positive and Gram-negative bacteria. This strain was also able to produce magnesium oxide nanoparticles. The formed nanoparticles with a size of 135 nm showed significant antibacterial and antioxidant effects. The best strain was introduced as Enterococcus hirai. According to the findings, it seems that this probiotic strain producing biosurfactant and magnesium oxide nanoparticles can be used in food and industrial industries. Manuscript profile -
Open Access Article
14 - The Effect of Cytokinin and Iron on Seed Yield and Accumulation some Elements in Seed of Chickpea Genotypes under Dry land Conditions
Kianoush Hamidian -
Open Access Article
15 - A computational study of N2 adsorption on aromatic metal Mg16M;(M=Be, Mg, and Ca) nanoclusters
Mahmood Reza Dehghan Sara Ahmadi -
Open Access Article
16 - Efficacy of the stabilizers of Talaromyces flavus in biological control of sugar beet seedling damping-off disease
Sheedeh Mehraban Booshehri Laleh Naraghi Mohammad TorabiIn the present study, first the superior bioformulations for Talaromyces flavus,containging some chemical stabilizers were determined by measuring the presentage of active spores in bioformulations and then their efficacy in biological control of sugar beet seedli MoreIn the present study, first the superior bioformulations for Talaromyces flavus,containging some chemical stabilizers were determined by measuring the presentage of active spores in bioformulations and then their efficacy in biological control of sugar beet seedling damping-off was investigated in greenhouse. An experiment was performed in split plot based on randomized complete block design with four replications in greenhouse. Three inoculum application methods (soil treatment, seed treatment and combination of both methods) were considered as the main factor and eight different inoculum formulations including six superior bioformulations Dicycloserin-TF-Su-K-1,Dicycloserin-TF-Su-K-2,Dicycloserin-TF-Su-K-3, Carboxymethilcellolose-TF-Su-K-2, Sulfate magnesium-TF-Su-K-3 and Nitratesodium-TF-Su-K-2. together with two control treatments (healthy and infected checks) were considered as the sub-factor.The results indicated that the most effective treatments for biological control of sugar beet damping-off were Dicycloserin stabilizer and isolate TF-Su-K-3, separetely. Results of the interaction effects of inoculum application method and inoculum showed that the treatment of Dicycloserin-TF-Su-K-2 applied as soil treatment or as combination of soil and seed treatment resulted in less disease occurrance. Manuscript profile -
Open Access Article
17 - Investigation on effect of die geometric parameters on equal channel angular extrusion of bulk nanostructured magnesium alloy AZ31
Mohammad Farzanfar Ali Heidari Mohsen Loh-mousaviIn this study, the equal channel angular extrusion (ECAE) of magnesium alloy AZ31 was simulated using 3D FEM by Abaqus software. The results show an appropriate agreement between the research results and the analytical relationships, experimental and numerical results o MoreIn this study, the equal channel angular extrusion (ECAE) of magnesium alloy AZ31 was simulated using 3D FEM by Abaqus software. The results show an appropriate agreement between the research results and the analytical relationships, experimental and numerical results of other researchers. Also, the forming force, strain, nano quality and workpiece behavior during the process were investigated. The results indicate that in the part of the workpiece that is at the channel angle side, better microstructure is formed. Also, the effect of die geometric parameters showed that the channel angle has a great impact on the effective plastic strain and forming force. By increasing the channel angle, the effective plastic strain and the forming force decreases. But the corner angle of the die does not have much effect. Manuscript profile -
Open Access Article
18 - Experimental studies on the convective heat transfer of MgO–water nanofluid
mohammad ghavidel Seyfolah SaedodinThe present study aimed to investigate the convective heat transfer coefficient of nanofluids containing magnesium oxide nanoparticles in water-based fluid in the exchanger plates have been carried out. Tests on the volume fraction of (0.005, 0.01, 0.015and 0.02) were u MoreThe present study aimed to investigate the convective heat transfer coefficient of nanofluids containing magnesium oxide nanoparticles in water-based fluid in the exchanger plates have been carried out. Tests on the volume fraction of (0.005, 0.01, 0.015and 0.02) were used in this study have Ast.nanvzrh which has a diameter of 20 nm. Also the results show that with increasing fraction nanofluid volume, heat transfer coefficient and thus increases the heat transfer. Also heat transfer nanofluids% increase in volume fraction of 0.02 to 0.005 respectively 52% and 4.3% is on. Manuscript profile -
Open Access Article
19 - Experimental study of dynamic viscosity of the fluid water-based nanofluids magnesium oxide
محمد قویدل سیف الله سعدالدینIn this study, the dynamic viscosity of the fluid is water-based nanofluids magnesium oxide discussed. The experiments in four volume fraction (0.005, 0.01, 0.015 and 0.02) and four different diameter nanoparticles 20, 40, 50 and 60 nm were used. The results obtained in MoreIn this study, the dynamic viscosity of the fluid is water-based nanofluids magnesium oxide discussed. The experiments in four volume fraction (0.005, 0.01, 0.015 and 0.02) and four different diameter nanoparticles 20, 40, 50 and 60 nm were used. The results obtained in this way is that by increasing the volume fraction of a specified diameter, the viscosity of nanofluids increases and by increasing the diameter Nanvdrh in a specified volume fraction, the viscosity of nanofluids decreases the viscosity reduction benefits of using nanofluids in the industry more. Manuscript profile -
Open Access Article
20 - Effect of Foliar Application of Magnesium and Potassium Sulfate on Morphological, Biochemical and Yield Characteristics of Maize (Zea mays L.) During Water Deficiet Stress
Arman Sotoodeh Tayeb Saki Nejad Alireza Shokuhfar Shahram Lak Mani MajaddamDrought stress is one of the most important factors that limiting the growth and yield of plants. In recent years the use of various methods to reduce its negative effects has been considered by many researchers. This experiment was performed as a split plot in the form MoreDrought stress is one of the most important factors that limiting the growth and yield of plants. In recent years the use of various methods to reduce its negative effects has been considered by many researchers. This experiment was performed as a split plot in the form of randomized complete blocks with four replications in two years. The effect of foliar application of different ratios of magnesium and potassium on the morphological, biochemical and functional characteristics of maize (single cross cultivar 704) in different irrigation cycles (50, 75 and 100 mm evaporation from Class A evaporation pan) was evaluated. The results of analysis of variance showed that the interaction of irrigation and magnesium to potassium ratio on the characteristics of height, stem diameter, ear length, number of seeds per ear, potassium uptake, magnesium uptake, chlorophyll a, chlorophyll b, total chlorophyll, Carotenoids, proline, biological yield, grain yield and harvest index had a statistically significant effect. The results of the study of the effect of potassium and magnesium on morphological and biochemical changes in drought tolerance in maize (Single Cross 704 cultivar) showed that consumption of these elements significantly increased plant height, stem diameter, ear length, number of seeds per ear, uptake rate Potassium, magnesium uptake, chlorophyll a, chlorophyll b, total chlorophyll, carotenoids, proline, biological yield, grain yield and harvest index in water deficit conditions; So that the highest value of these traits in evapotranspiration conditions was 50 mm from the evapotranspiration pan and application of 200 kg of magnesium sulfate/ 300 kg of potassium sulfate. Also, foliar application of different concentrations of potassium sulfate and magnesium sulfate by increasing the uptake of potassium and magnesium, preserving leaf chlorophyll, resulting in more effective photosynthesis as well as increasing the concentration of proline in plant leaves, moderate the negative effects of water deficiency and corn tolerance to conditions. Improve water shortage. Manuscript profile -
Open Access Article
21 - Mid-seasonal evaluation of serum magnesium levels and its relationship with selective serum biochemical parameters in sheep of Miandoab region
F. Behmard A.P. Rezaii SaberMagnesium is essential to activate many enzymatic systems by development of metal-enzyme complexes. Thus, its deficiency is especially important in ruminants. The aim of the current study was to investigate the serumic levels of magnesium and its relation to levels of c MoreMagnesium is essential to activate many enzymatic systems by development of metal-enzyme complexes. Thus, its deficiency is especially important in ruminants. The aim of the current study was to investigate the serumic levels of magnesium and its relation to levels of calcium, phosphorus, total protein, albumin, glucose, and total bilirubin in Ghezel ewes of Miandoab city. For this purpose, seasonal blood samples were collected from 100 Ghezel ewes in Miandoab region and the levels of magnesium, calcium, phosphorus, total protein, albumin, glucose, and total bilirubin evaluated. Results of parameters in different seasons were analyzed and compared by one-way ANOVA. Relation of each parameter with magnesium levels of serum was evaluated by Pearson correlation coefficient. Magnesium levels was higher in autumn and winter than summer and spring and total protein and phosphorus was lower than summer and spring (p<0.05). Increase in magnesium levels resulted in decrease of calcium, total protein, and phosphorus indicating an indirect and significant relationship (p<0.05). Bilirubin and albumin levels also had a direct and significant relationship with magnesium levels (p<0.05) whereby they both increased following magnesium increase. Alterations in magnesium levels of serum in ewes has direct or indirect effects on biochemical parameters of serum. According to the results of this study, it is essential to use standard magnesium supplements in ewes' nutrition. Manuscript profile -
Open Access Article
22 - Effect of magnesium oxide nanoparticles on varicocele-induced testicular damage in male Wistar rats
Masoumeh Tolu Ghamari Akram Eidi Pejman Mortazavi Ahmad AsghariVaricocele is a pathological dilation of the venous network of the spermatic cord and considering that magnesium oxide nanoparticles play a key role in various physiological functions, the aim of this study was to evaluate the performance of nanoparticles on sperm chara MoreVaricocele is a pathological dilation of the venous network of the spermatic cord and considering that magnesium oxide nanoparticles play a key role in various physiological functions, the aim of this study was to evaluate the performance of nanoparticles on sperm characteristics affected by experimental varicocele. A total of 54 male Wistar rats were randomly divided into 9 equal groups including healthy control group (untouched animals), sham-operated group (underwent sham surgery), three healthy experimental groups (animals in these groups received magnesium oxide nanoparticles at doses of 1.25, 2.5 and 5 mg/kg respectively by gavage for 6 weeks), varicocele control group (varicocele was induced by renal vein ligation) and three experimental varicocele groups (in addition to varicocele induction, magnesium oxide nanoparticles were given at doses of 1.25, 2.5 and 5 mg/kg respectively by gavage for 6 weeks). At the end of the 6th week, the abdomen was opened and semen samples were collected from the tail of the epididymis to determine the indices of concentration, survival and motility of sperm and the data were statistically analyzed (p<0.05). The results showed that magnesium oxide nanoparticles were able to significantly increase the concentration, viability, progressive, moderate and non-progressive movements of sperm compared to the varicocele group (p<0.001) and also caused a significant decrease (p<0.001) in the number of non-moving sperms in the varicocele experimental groups. Therefore, magnesium oxide nanoparticles may possibly reduce the destructive effects of varicocele due to their antioxidant activity and be effective in its treatment by improving sperm properties during varicocele. Manuscript profile -
Open Access Article
23 - Effect of magnesium sulfate on letrozole-induced oxidative stress in ovarian tissue of adult female Wistar rats
Zahra Aslahnezhad Akram Eidi Pejman Mortazavi Shahrbanoo OryanBackground and Purpose: Magnesium is the fourth most abundant cation and the second most abundant intracellular cation in the human body. Magnesium is involved in many essential physiological functions. It is a co-factor for over 300 enzymatic reactions, many of which i MoreBackground and Purpose: Magnesium is the fourth most abundant cation and the second most abundant intracellular cation in the human body. Magnesium is involved in many essential physiological functions. It is a co-factor for over 300 enzymatic reactions, many of which involve generation of adenosine triphosphate (ATP), it regulates transmembrane transport of other ions, including calcium and potassium, and stabilizes secondary structures of DNA and RNA. Consequently, magnesium is essential for muscle contraction and relaxation, cardiac rhythm, vascular tone, neurological function, and cell proliferation. Magnesium is required for cell proliferation, cellular energy production, mineral metabolism, bone development, and glucose homeostasis. Nutrition surveys in North America indicate that magnesium consumption is below recommended intakes for a large segment of the population. Furthermore, diseases such as type 2 diabetes and use of certain medications can increase magnesium loss and predispose individuals to magnesium deficiency. The low magnesium intakes in comparison to current recommendations combined with the high prevalence of factors that can increase magnesium requirements raise a concern about widespread Mg deficiency. Biochemical data lend further support. Hypomagnesemia exists in the general population and the incidence is high in certain subpopulations. Since magnesium is required for many enzymatic reactions, Magnesium deficiency can presumably affect numerous physiological processes. Some studies have reported changes in body composition with dietary magnesium restriction. In rats, maternal and postnatal feeding of a magnesium-deficient diet decreased body weight, lean body mass, and fat-free mass and increased percentage body fat in the offspring. In contrast, body weight, fat mass, and lean mass were similar in rats fed a high-fat diet containing normal or low magnesium beginning after weaning. Polycystic ovary syndrome (PCOS) is a prevalent endocrinological disorder in reproductive-age women and is often associated with metabolic syndrome. Evidence suggests that oxidative stress and low degrees of chronic inflammation play an important role in the pathogenesis of PCOS. PCOS is the most common endocrine disorder in premenopausal women. PCOS is a common and multifactorial disease that affects approximately 4-18% of all reproductive-aged women in the world. In the clinic, hyperandrogenism and insulin resistance appear to be the major etiological drivers for reproductive and metabolic abnormalities in women with PCOS. While it is believed that anovulation is the main reason for infertility in PCOS patients, accumulating evidence from clinical studies also indicates that the impairment of endometrial function likely causes recurrent pregnancy loss, premature delivery, endometrial hyperplasia, and carcinoma in women with PCOS. Additionally, several lines of evidence suggest that the systemic low-grade inflammation that often coincides with PCOS compromises multiple aspects of fertility. A deficiency in the activity of aromatase was one reasonable intraovarian disturbance in steroidogenesis thought to cause PCOS. Because aromatase catalyzes the rate-limiting step in the biosynthesis of oestrogens from androgens, a decrease in the activity of this enzyme could be expected to result in increased ovarian androgen production and development of PCOS. The purpose of this study, the effect of magnesium sulfate on letrozole-induced oxidative stress was investigated in ovarian tissue of adult female Wistar rats. Materials and Methods: In this study, a total of 36 female rats were randomly divided into 6 groups of 6: The normal control group (intact), the healthy experimental group (magnesium sulfate 100 mg/kg body weight, gavage), ovarian damage control group (letrozole 1 mg/kg body weight, gavage), ovarian damage experimental group (magnesium sulfate 10, 50, and 100 mg/kg body weight together letrozole). The animals were euthanized 24 h after the last dose of the treatment on day 31. Ovaries were immediately obtained after the animals were sacrificed. The ovaries were homogenized and centrifuged. The supernatant was used to assay the activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in ovarian tissue were investigated. Data were analyzed using one-way ANOVA and Tukey test. The criterion was significant (p Manuscript profile -
Open Access Article
24 - FSP pass number and cooling effects on the microstructure and properties of AZ31
Akbar Heidarpour Saeed Ahmadifard Nadia Rohania -
Open Access Article
25 - In vitro behavior of silk fibroin-coated calcium magnesium silicate scaffolds
Masoud Hafezi Hossein Mohammadi Ali Nadernezhad Pardis Fazlali Noor Azuan Abu Osman -
Open Access Article
26 - Effect of Milling Time on Hydrogen Desorption Properties of Nanocrystalline MgH2
Ali Motavalli Mohammad Rajabi Alireza Gholipoor -
Open Access Article
27 - The Effect of Magnesium on the Microstructure and Stress Rupture Properties of Hastelloy X Supealloy
Masumeh seifollahi Afagh panahi moghaddam seysd Mahdi Abbasi seyed Mahdi ghazi mir saeed -
Open Access Article
28 - Effect of Fluoride Coating on the Degradation of Mg-Based Alloy Containing Calcium for Biomedical Applications
Abouzar Rezaei-Baravati Masoud Kasiri-Asgarani Hamid Reza Bakhsheshi-Rad Mahdi Omidi Ebrahim Karamian -
Open Access Article
29 - Positive and negative effects of two types of iron fertilizers on growth, chlorophyll content, protein, phosphorus and some metal elements in the ornamental-medicinal plant Euphorbia tirucalli L. under pot culture conditions.
Fateme Bagheri Aryan Sateei Mazeyar Ahmadi golsefidi Mehdi EbadiEuphorbia tirucalli L. is an ornamental-medicinal plant. The present study investigates the effect of two types of iron fertilizers (HUM or Excel) in two concentrations of 0.2 and 0.4 g per 80 cm2 of soil, with or without NPK (20 20 20) with a concentration of 3 g / l o MoreEuphorbia tirucalli L. is an ornamental-medicinal plant. The present study investigates the effect of two types of iron fertilizers (HUM or Excel) in two concentrations of 0.2 and 0.4 g per 80 cm2 of soil, with or without NPK (20 20 20) with a concentration of 3 g / l on growth and the amount of potassium, phosphorus, iron, zinc, manganese and magnesium in the roots and shoots. A total of 9 treatments and control in four replications were made in randomized complete blocks for 11 months. Growth parameters included dry and fresh weight of plant,, root and shoot, and ratio of fresh and dry weight of root to whole plant. In this study, general effects of iron fertilizers on the dry weight of plants, roots and shoots,, ratio of fresh and dry weight of roots to plants, shoot protein content, and root phosphorus were not significant. Addition of Excel + NPK(20 20 20) at higher concentration, reduced the fresh weight of plants and shoots significantly. HUM + NPK(20 20 20) at higher concentration caused a significant increase in chlorophyll content of the plant compared to the control samples, but no significant difference was observed between other treatments and the control sample in terms of chlorophyll content. Also, HUM + NPK (20-20 20) caused a significant increase in the amount of some metal elements in the roots or shoots of the plant compared to the control samples.Another highlight in this study is the negative correlation of growth parameters and the correlation of some other parameters with the plant zinc content. There is also a positive correlation between chlorophyll and iron levels. Another aspect of using iron fertilizer has been the change in the pattern of absorption and distribution of the elements between the roots and shoots of this plant. Manuscript profile -
Open Access Article
30 - An Investigation on Formability and Crystallographic Texture in Novel Magnesium Alloys
Pnina Ari-Gur Andreas Quojo Quainoo Shubram Subramanyam Ashkan Razania Sven C. Vogel Wei Gao -
Open Access Article
31 - Production of beta-galactosidase from whey using Kluyveromyces marxianus
nahid ebrahimi Fatemeh NejatiBeta-galactosidase is one of the most important industrial enzymes capable of decomposing lactose into glucose and fructose. In this study, two strains of Kluyveromyces marxianus (GY101 and BY101) were investigated for the production of the β-galactosidase from whe MoreBeta-galactosidase is one of the most important industrial enzymes capable of decomposing lactose into glucose and fructose. In this study, two strains of Kluyveromyces marxianus (GY101 and BY101) were investigated for the production of the β-galactosidase from whey as a culture media. Whey was inoculated with each strain and examined for enzyme production with aeration at 100 rpm for 144 hours. In order to increase the enzyme production, the effect of adding yeast extract (0.2 and 0.5%), magnesium sulfate (0.5%) and manganese sulfate (0.5%) at 24, 48, 96, 120 and 144 hours at 30°C and 37°C were investigated and the enzyme activity was measured. The highest enzyme production after 144 hours at 30°C with GY101 and BY101 strains by adding yeast extract (0.5%) were 2.25 and 2.18 U/ml, and with magnesium sulfate added 2.12 and 1.94 U/ml, respectively. According to the results of this study, whey cheese is an appropriate environment for the production of the β-galactosidase enzyme using Kluyveromyces marxianus with the presence of yeast extract and magnesium and manganese sulfate as supplements. The best temperature for the production of the enzyme in both strains was 30°C, and the addition of mineral supplements and yeast extract had a positive effect on the production of β-galactosidase. While the GY101 strain was more suitable than BY101 and magnesium sulfate was more suitable than manganese sulfate, and the enzyme activity increased with increasing yeast extract concentration. Manuscript profile -
Open Access Article
32 - Activity of Cu-Co-M (M= Ce, Ni, Au, Mg) catalysts prepared by coprecipitation method, calcined at high temperature for CO oxidation
Gaurav Rattan Chirag Khullar Maninder Kumar -
Open Access Article
33 - Magnetically separable MgFe2O4 nanoparticle for efficient catalytic ozonation of organic pollutants
Akbar Eslami Ali Oghazyan Mansour Sarafraz -
Open Access Article
34 - Improving methodology for the preparation of highly substituted imidazoles using nano-MgAl2O4 as catalyst under microwave irradiation
Javad Safari Soheila Gandomi-Ravandi Zahra Akbari -
Open Access Article
35 - Changes in some physiological traits and mucilage yield of sour tea (Hibiscus Sabdariffa L.) under foliar application of magnesium and iron oxide nanoparticles
Payam Moaveni Hasti Kiapour Behzad Sani faizeh rajabzadeh Hamid Mozafari -
Open Access Article
36 - Magnesium ferrite/reduced graphene oxide nanocomposite and its photocatalytic application in pollutant degradation and fuel production
majid Ghanimati Mohsen Lashgari Vassilios BinasPreparation of effective nanocomposite energy materials using Earth-abundant elements and eco-friendly chemicals for application in photocatalytic degradation of hazardous materials and production of fuel is a sustainable strategy for pollutant removal and supplying hyd MorePreparation of effective nanocomposite energy materials using Earth-abundant elements and eco-friendly chemicals for application in photocatalytic degradation of hazardous materials and production of fuel is a sustainable strategy for pollutant removal and supplying hydrogen, the green/carbon-free fuel in modern world. In this article, the nanostructured magnesium ferrite (MgFe2O4) semiconductor was synthesized and employed for the production of hydrogen gas through the light-induced splitting of alkaline H2S solution and photocatalytic degradation of methyl orange–a refractory azo dye. Investigations revealed that the synthesized photocatalyst has the ability to destroy pollutant and produce hydrogen. To improve the photocatalyst activity, graphene oxide (GO) precursor was prepared through the modified Hummers method and utilized directly in the hydrothermal synthesis of MgFe2O4/rGO nanocomposite. The evidence showed that the presence of rGO (reduced graphene oxide) and the formation of nanocomposite can significantly increase the decolorization ability and hydrogen release in terms of enlarging the photocatalyst surface area, slowing down the electron-hole recombination, and enhancing photon absorption. The degradation efficiency was 84% [measured after one hour operation of the photoreactor] and the rate of hydrogen release was 5567 µmol/h [per gram of photocatalyst], indicated the good performance of the nanocomposite photocatalyst in pollutant removal and fuel production Manuscript profile -
Open Access Article
37 - Effect of salinity on morphological and physiological activities Accumulation in Mustard Plant (Brassica nigra.)
Mahroo Ghadrian -
Open Access Article
38 - New nano-absorbent GJ-92 sponge, Demospongiae Persian Gulf for separation of magnesium ion application
H. Ghafourian S. Javidi M. RabbaniThe Demospongiae was used in Kish Island of Persian Gulf as the biologic absorptive with nano fovea for removing magnesium action and the effect of density, contact time and the size of the absorptive particle was studied in absorption capacity. The absorption cap MoreThe Demospongiae was used in Kish Island of Persian Gulf as the biologic absorptive with nano fovea for removing magnesium action and the effect of density, contact time and the size of the absorptive particle was studied in absorption capacity. The absorption capacity of magnesium ion in 10, 30, 50 and 300 mg /l was tested on shaker and the capacities of 0.7, 3, 6.6, 80.3 mg/g were obtained respectively which showed that the absorption capacity increases with density. In addition, the absorption of magnesium ion in the densities of 10, 30 and 50 mg/l, in contact time of 1 hour without shaker, were 1.2, 4.2, 11 and in 3 hours, 0.2, 4.6 and 14.5 mg/g, which showed that the absorption capacity does not increase with contact time. The absorption capacity in absorbent size of 70 meshes and 120 meshes were 80.3, 64.6 and 74.2 mg/g respectively, which showed that the absorption capacity is more when used in pieces. The results of the present research showed that the absorption capacity of magnesium ion by Persian Gulf sponge is 80.3 mg/g and the reported ratio is higher compared to other natural absorbents and is now the highest capacity. Manuscript profile -
Open Access Article
39 - خستگی کنترل شده بار از AZ31B
E. کلاته مولایی ح. جاهد -
Open Access Article
40 - Essential oil percent and essential oil yield of basil (Ocimum basilicum L.) changes affected by nitrogen, magnesium and manganese amounts
A. R. Pazoki M. Ghazi Pirkouhi A. H. Shirani Rad M. Bigdeli D. HabibiIn order to study the essential oil precent and essential oil yield of basil (Ocimum Basilicum L.) changes affected by nitrogen, magnesium and manganese amounts, this experiment carried out in spring and summer 2008 in Islamic Azad University takestan branch research fa MoreIn order to study the essential oil precent and essential oil yield of basil (Ocimum Basilicum L.) changes affected by nitrogen, magnesium and manganese amounts, this experiment carried out in spring and summer 2008 in Islamic Azad University takestan branch research farm. The experimental design was split factorial in the basis of randomized complete blocks design with 3 replications . The experimental factors included nintrogen application in 4 levels 0, 50, 100 and 150 kg /ha as main factor and magnesiumand manganesefoliar application in 2 levels 0 and 1/2 kg/ha in the form factorial design as subfactor. Simple effect of factors showed that, 150 Kg/ha nitrogen application with % 0/32 and 41.98 Kg/ha, 1.2 Kg/ha magnesium foliar application with % 0.39 and 52.67 Kg/ha and 1/2 Kg/ha manganese spraying with % 0.36 and 47/06 Kg/ha produced maximum amounts of essential oil precent and essential oil yield in basil. Highest essential oil precent (% 0.51) and essential oil yield(72.6 Kg/ha) of basil gained in 150 kg/ha and 1.2 kg/ha. Tripple interaction effect indicated that, 150 Kg/ha nitrogen soil application and 1.2 Kg/ha magnesiumand manganese foliar application caused highest essential oil precent(% 0.55) and essential oil yield (79.70 Kg/ha) alternatively. Manuscript profile -
Open Access Article
41 - The effect of bio fertilizer and magnesium sulfate on the components of essential oil of Satureja hortensis L.
A. Badali F. NejatzadehThis research in order to study the effects of the effect of bio fertilizer and magnesium sulfate on the components of essential oil of Satureja hortensis L., was performed. The experiment was based on randomized complete block design with 6 treatments and 3 replication MoreThis research in order to study the effects of the effect of bio fertilizer and magnesium sulfate on the components of essential oil of Satureja hortensis L., was performed. The experiment was based on randomized complete block design with 6 treatments and 3 replications. The factors consisted of 2 levels of inoculation with fertilizer barvar 2 and non-inoculation) and 3 levels spraying of magnesium sulfate (0, 2 and 4 g). The traits were plant height, number of stems, stem diameter, dry weight, yield, essential oil percentage and essential oil yield. The results of analysis of variance showed that the highest yield was obtained by inoculation with fertilizer barvar 2 and 4 g magnesium sulfate, with a mean of 80/50 kg ha-1, and the lowest yield in non-fertilized treatment with fertilizer barvar 2 and the non-application of magnesium sulfate with a mean of 23 kg ha-1 was obtained. The results showed that the highest percentage of essential oil was obtained by inoculation with barvar 2 and 4 g magnesium sulfate with an average of 1.02 kg ha-1 and the lowest percentage of essential oil without Fertilizer barvar 2 and non-application of magnesium sulfate with the average was 0.64 kg ha-1. In general, the results of this experiment showed that in order to produce more essential oil and to have more dry yield, it seems appropriate to inoculate with barvar 2 and 4 g magnesium sulfate. Manuscript profile -
Open Access Article
42 - Salinity effect on some nutrient concentration of rice crop (Oryza sativa L.) tissues and total biomass in different growth stages
A. Fallah E. Farahmandfar F. MoradiSalinity stress causes change in absorption and transformation of nutrients in rice plants. In order to determine of salinity, affect in different growth stages of rice crops on the concentration of sodium, potassium, calcium and magnesium ions of roots, stems and leave MoreSalinity stress causes change in absorption and transformation of nutrients in rice plants. In order to determine of salinity, affect in different growth stages of rice crops on the concentration of sodium, potassium, calcium and magnesium ions of roots, stems and leaves, was carried out pot experiment in the greenhouse of rice research institute of Iran(Amol) in 2014. The experiment as a split plot factorial in base of completely random design with three replicates, with two rice varieties, hybrid rice (Dialam) and PSBRC88 as main plots, and three levels of salinity (0, 6, 12 ds.m-1) with three growth stages (Tilling, Stem elongation, Flowering) as sub-plots factorial. Hydroponic culture was done in pots with 6 L Yoshida solution. The content of sodium, potassium, calcium and magnesium ions of roots, stems and leaves were measured that salinity treatments were done about 20 days for each stage. The results showed that the content of potassium, calcium and magnesium ions of roots, stems and leaves were decreased with increasing of salinity level at each growth stage. In check treatment, the highest of ions concentration was at flowering stage and the ions content of roots was always less than stems and leaves. The concentration amount of potassium, calcium and magnesium were higher in PSBRC88 variety than hybrid rice (Dialam). Therefore, PSBRC88 variety had higher ions uptake efficiency of sodium, potassium, calcium and magnesium in slat stress and had more biomass. Manuscript profile -
Open Access Article
43 - The effect of salinity on concentration of some elements of Rice (Oryza Sativa L.) tissues and biomass in different growth stage
E. Farahmandfar F. Moradi A. FallahSalinity stress causes change in absorption and transformation of nutrients in rice plants. In order to determine of salinity affect in different growth stages of rice crops on the concentration of sodium, potassium, calcium and magnesium ions of roots, stems and MoreSalinity stress causes change in absorption and transformation of nutrients in rice plants. In order to determine of salinity affect in different growth stages of rice crops on the concentration of sodium, potassium, calcium and magnesium ions of roots, stems and leaves, was carried out pot experiment in the greenhouse of rice research institute of Iran(Amol) in 2014. The experiment as a split plot factorial in base of completely random design with three replicates, with two rice varieties, hybrid rice (Dialam) and PSBRC88 as main plots, and three levels of salinity (0, 6, 12 ds.m-1 ) with three growth stages (Tillering, Stem elongation, Flowering) as sub-plots factorial. Hydroponic culture was done in pots with 6 L Yoshida solution. The content of sodium, potassium, calcium and magnesium ions of roots, stems and leaves were measured that salinity treatments were done about 20 days for each stage. The results showed that the content of potassium, calcium and magnesium ions of roots, stems and leaves were decreased with increasing of salinity level at each growth stage. In check treatment, the highest of ions concentration was at flowering stage and the ions content of roots was always less than stems and leaves. The concentration amount of potassium, calcium and magnesium were higher in PSBRC88 variety than hybrid rice (Dialam). Therefore, PSBRC88 variety had higher ions uptake efficiency of sodium, potassium, calcium and magnesium in slat stress and had more biomass. Manuscript profile -
Open Access Article
44 - Determination of Magnesium, Calcium and Sulphate Ion Impurities in Commercial Edible Salt
Ahmad Heydarieh Majid Arabameri Arezoo Ebrahimi Atefeh Ashabi Leila Monjazeb Marvdashti Behdad Shokrollahi Yancheshmeh anna abdolshahi -
Open Access Article
45 - Investigation the effects of SiC reinforcement incorporation on mechanical properties of friction stir welded AZ31 magnesium alloy
AMIN ABDOLLAHZADEH Ali shokouhfar حمید امیدوار محمد علی صفرخانیان محمدرضا نادریIn this study, the friction stir welding process was used for simultaneously joining of AZ31 magnesium alloy and production of Mg/Sic nanocomposite in the stir zone. All combinations of three rotational speeds i.e, 600, 800, and 1000 rpm and four traveling speeds i.e, 2 MoreIn this study, the friction stir welding process was used for simultaneously joining of AZ31 magnesium alloy and production of Mg/Sic nanocomposite in the stir zone. All combinations of three rotational speeds i.e, 600, 800, and 1000 rpm and four traveling speeds i.e, 25, 75, 125 and 175 mm/min were tested and then the mechanical properties were examined. The joint fabricated with rotational speed of 800 rpm and traveling speeds of 75 mm/min, exhibited the highest mechanical properties, So that the yield strength, tensile strength and percent elongation improved by 11%, 39% and 88%, respectively. The results show that the proper distribution of nanoparticles in the stir zone can reduce the average grain size and improve mechanical properties. The main reason for this change is related to pinning effect and increased nucleation sites associated with SiC nano-particles. Moreover, reinforcement particles resulted in breaking of primary grains in stir zone of friction stir welding. Manuscript profile -
Open Access Article
46 - Investigation of hydrogen desorption temperature of MgH2-10wt% (Ti, Mn, V and Fe) nanocomposite produced by mechanical alloying
حسین محمدی سید جمال حسینی پور محمد رجبیMagnesium hydride is one of the attractive hydrogen storage materials because of its hydrogen storage capacity (7.6 wt %), low cost and light weight. However, high hydrogen desorption temperature and a high reactivity toward oxygen limit the use of MgH2 in practical app MoreMagnesium hydride is one of the attractive hydrogen storage materials because of its hydrogen storage capacity (7.6 wt %), low cost and light weight. However, high hydrogen desorption temperature and a high reactivity toward oxygen limit the use of MgH2 in practical applications. Many efforts have focused on Mg-based hydrides in recent years to reduce the desorption temperature. These can be accomplished to some extent by changing the microstructure of the hydride by mechanical alloying and also by using proper catalysts. In this work, Ti, Mn, V and Fe elements were added to MgH2 either in the form of powder mixture or prealloyed powder and after 30 h mechanical alloying, the properties of obtained nanocomposites were investigated by X-ray diffractometery, scanning electron microscopy and thermal analysis. The results showed that the addition of prealloyed powder to MgH2 and 30 h mechanical alloying of powder mixture is more effective in dehydrogenation properties. Manuscript profile -
Open Access Article
47 - Synthesis of Mg0.5Zn0.5Fe2O4 nanoparticles via co-precipitation method and study of its sensitivity properties
حمیدرضا ابراهیمی علی رضا امینیIn this study, synthesis and studying sensitivity of Nano sensor of zinc magnesium ferrite with common formula of Mg0.5Zn0.5Fe2O4 has been considered. Applied method for manufacturing Nano sensor is co-precipitation method that is a novel method for this combination. Na MoreIn this study, synthesis and studying sensitivity of Nano sensor of zinc magnesium ferrite with common formula of Mg0.5Zn0.5Fe2O4 has been considered. Applied method for manufacturing Nano sensor is co-precipitation method that is a novel method for this combination. Nano sensor structure was investigated using such experiments as X-ray diffraction (XRD(, transmission electron microscopy (TEM) and X-ray fluorescence (XRF). Respectively, XRD experiment confirmed the formation of ferrite phase, TEM image showed nanostructure formation of this ferrite and XRF information reconfirmed correct atomic relation of ferrite. Sensitivity of this Nano sensor was tested using a laboratory system equipped with sensor heater with the ability of temperature control on which Nano-sensor was put, a chamber for injecting various solvents and a connector electronic range that transferred Nano-sensor information to computer and it was analyzed by Lab View software. This system could control temperature and wetness and its volume was 5 litters. This Nano sensor was tested using ethanol, methanol, chloroform, acetonitrile, ammonia and acetone and sensitivity of methanol and acetonitrile was better than others. The best response temperature for this Nano sensor (between 100˚C -300˚C) was 300˚C. Manuscript profile -
Open Access Article
48 - The effect of thermomechanical parameters on texture behavior of AZ63 magnesium alloy
غلامرضا ابراهیمی مهدی کاویانیHot compression test was carried out on extruded AZ63 magnesium alloy samples to investigation of the effect of thermomechanical parameters on AZ63 magnesium alloy texture behavior. At first, samples have been machined on two extruded direction (ED) and normal direction MoreHot compression test was carried out on extruded AZ63 magnesium alloy samples to investigation of the effect of thermomechanical parameters on AZ63 magnesium alloy texture behavior. At first, samples have been machined on two extruded direction (ED) and normal direction (ND). Then, hot compression test performed at 250 °C and strain rates of 0.01 s-1 and 1 s-1 and various strain. Microstructural investigation and texture evolution reveal that tensile twinning leading to basal texture improvement in roll direction (RD=ED) and compressive twinning causes changing texture align transverse direction (TD) at primarily strain during hot compression test. Also, observation of Texture evolution by pole figures indicate that dynamic recrystallization reduces basal texture intensity in ND samples at high strains. Manuscript profile -
Open Access Article
49 - The effect of calcium on corrosion behavior of biodegradable Mg-5Zn-1Y Alloy
Fereshteh Dostmohamadi Hasan JafariToday, magnesium alloys as the new generation of biodegradable alloys, have attracted the attention of many researchers. In this research, the corrosion behavior of cast Mg-5Zn-1Y containing different amounts of calcium (0, 0.1, 0.5 and 1 weight percentage) was investig MoreToday, magnesium alloys as the new generation of biodegradable alloys, have attracted the attention of many researchers. In this research, the corrosion behavior of cast Mg-5Zn-1Y containing different amounts of calcium (0, 0.1, 0.5 and 1 weight percentage) was investigated. The microstructure of the alloys was analyzed using optical and scanning electron microscopes, and the corresponding phases were detected by X-ray diffraction. Corrosion behavior of cast alloys was measured using electrochemical polarization and immersion tests. Metallography analysis revealed that microstructure of the Mg-5Zn-1Y alloy includes α-Mg matrix and Mg3YZn6 lamellar phase formed at the grain boundary. The addition of calcium to the alloy refined the grains and resulted in the formation of continuous Ca2Mg6Zn3 at grain boundaries. No passive zone was detected in polarization curves, meaning domination of active polarization, indicating increased corrosion rate due to grain refinement which can be attributed to calcium addition in the alloy. The polarization and immersion tests results confirmed that the alloy Mg-5Zn-1Y-0.1Ca has the lowest corrosion rates among the investigated alloys, and the more the calcium content, the higher the corrosion rate due to the formation of cathodic Ca2Mg6Zn3 phase. Manuscript profile -
Open Access Article
50 - Synthesis and characterization of mesoporous magnesium silicate for controlled release drug applications
اشکان بی غمIn the present study, mesoporous magnesium silicate (m-MS) was synthesized via non-ionic surfactant-assisted sol-gel method. The m-MS was produced into an acidic medium and calcined at 550 ºC temperature to remove the organic template (P123). The aim of this study MoreIn the present study, mesoporous magnesium silicate (m-MS) was synthesized via non-ionic surfactant-assisted sol-gel method. The m-MS was produced into an acidic medium and calcined at 550 ºC temperature to remove the organic template (P123). The aim of this study was to evaluate the ability and application of drug loading and controlled release from m-MS. In addition, the effect of drug loading and release on textural properties of m-MS such as surface area, pore diameter and pore volume was investigated. The synthesized compound was studied by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), Brunauer–Emmett–Teller (BET) surface area analysis, transmission electron microscopy (TEM) and Uv-vis spectrophotometer. The low angle XRD, BET and TEM results showed that magnesium silicate contained 2D hexagonal honeycomb pore channels with uniform and homogeneously distributed mesopores of the same size. The m-MS demonstrated large specific surface area by about 504 m2/g and after adsorption of ibuprofen, the N2 adsorbed volume decreased obviously, and the corresponding BET surface area, pore size and pore volume changed from the 504 m2/g, 4.6 nm, 0.44 cc/g (550 ºC) to 225 m2/g, 1.2 nm, 0.21 cc/g (550 ºC drug loaded) respectively. This study revealed that m-MS has the ability to drug loading and controlled release of ibuprofen and can be used as a novel drug delivery system. Manuscript profile -
Open Access Article
51 - Effect of cooling rate on microstructure and corrosion behavior of biodegradable Mg-5Zn-1Y-0.1Ca alloy in simulated body fluid
Hasan Jafari Saeideh NaghdaliAbstract In the present study, the effect of different cooling rate on microstructure and corrosion behavior of Mg-5Zn-1Y-0.1Ca biomedical alloy are investigated. Microstructure observations using optical and scanning electron microscopes showed that the alloy contains MoreAbstract In the present study, the effect of different cooling rate on microstructure and corrosion behavior of Mg-5Zn-1Y-0.1Ca biomedical alloy are investigated. Microstructure observations using optical and scanning electron microscopes showed that the alloy contains α-Mg as the matrix, and Mg3YZn6 and Ca2Mg6Zn3 intermetallic precipitations, having lamellar morphology formed mostly at the grain boundaries. Also microstructure results showed that with increasing cooling rate, the continuity of precipitations increase in grain boundary and inter dendritic zones. The polarization test, as well as the immersion result, confirmed that increasing the cooling rate does not always improve the corrosion properties, and it seems there is an optimal cooling rate resulting in minimum corrosion rate. Abstract: In the present study, the effect of different cooling rate on microstructure and corrosion behavior of Mg-5Zn-1Y-0.1Ca biomedical alloy are investigated. Microstructure observations using optical and scanning electron microscopes showed that the alloy contains α-Mg as the matrix, and Mg3YZn6 and Ca2Mg6Zn3 intermetallic precipitations, having lamellar morphology formed mostly at the grain boundaries. Also mi Manuscript profile -
Open Access Article
52 - Precipitation synthesis and luminescence properties of MgAl2O4 nanoparticles doped with samarium
مژده ملک پور جرقویه سید علی حسن زاده تبریزی علی صفارA surfactant assisted Co-Precipitation method was employed for the synthesis of magnesium aluminate spinel with nanocrystalline size and high specific surface area. Calcination operations were performed in 800-1000° C for two hours. Different percentages of samarium MoreA surfactant assisted Co-Precipitation method was employed for the synthesis of magnesium aluminate spinel with nanocrystalline size and high specific surface area. Calcination operations were performed in 800-1000° C for two hours. Different percentages of samarium were doped to magnesium aluminate spinel to examine the properties of magnesium aluminate spinel. The prepared samples were characterized by thermal gravimetric and differential thermal gravimetric analyses (TG/DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), and photoluminescence spectrum (PL). XRD results showed that nanocrystals of magnesium aluminate spinel were influenced by the type of surfactant in 800° C. The results of luminescence spectrum show that by increasing the amount of samarium after 0.15 of weight percentage, concentration suppression happens and reduces the intensity of luminescence properties. Manuscript profile -
Open Access Article
53 - Kinetics of Carbothermic Reduction of Molybdenite in the Presence of Magnesium Oxide
khadijeh Biranvand Mohammad Hasan Abbasi Ali SaidiIn this research, the kinetics of carbothermic reduction of molybdenite in the presence of magnesium oxide was studied. Powder samples with a stoichiometric ratio (molybdenite: magnesium oxide: Graphite 1: 2: 2) prepared under simultaneous thermal analysis (STA), with t MoreIn this research, the kinetics of carbothermic reduction of molybdenite in the presence of magnesium oxide was studied. Powder samples with a stoichiometric ratio (molybdenite: magnesium oxide: Graphite 1: 2: 2) prepared under simultaneous thermal analysis (STA), with three heating rates of 10, 15 and 20 degrees per minute, respectively. A series of experiments were performed under isothermal argon atmosphere, to determine the intermediate phases formed during the process. The results showed that the process temperature range was 900 ºC to 1400 ºC and with the formation of intermediate phases of molybdenum oxide (MoO2) and magnesium molybdate (MgMoO4) goes. Kinetic investigations were done with the free model methods such as Friedman, Ozawa and Kissinger as well as model fitting method Coats - Redfern. The results of all methods were in good agreement with each other and suggested that the mechanism of the reaction was chemical control and activation energy was about 425 KJ/mol. Manuscript profile -
Open Access Article
54 - Modification of Microstructure and Enhancing Mechanical Properties of as-cast AZ91 Magnesium alloy via Friction Stir Processing
Hassan Jiryaei Sharahi Majid Pouranvari Mojtaba MovahediMagnesium alloys, as the lightest structural alloys, due to their high strength-to-weight ratio offer significant potential for improving energy efficiency of various transportation systems. This paper addresses the influence of friction stir processing (FSP) treatment MoreMagnesium alloys, as the lightest structural alloys, due to their high strength-to-weight ratio offer significant potential for improving energy efficiency of various transportation systems. This paper addresses the influence of friction stir processing (FSP) treatment on the microstructure and mechanical properties of cast AZ91 Mg alloy. It is demonstrated that FSP treatment enables elimination of dendritic structure, significant grain refining, break-up and partial dissolution of coarse β and formation of ultra-fine sub-micron Mg17Al12 particles. These microstructural modifications resulted in enhancement of mechanical properties in terms of tensile strength and energy absorption by 48% and 283%, respectively. It is shown that FSP treatment altered the failure mechanism of the alloy from brittle cleavage-dominant mode to ductile dimple-dominant mode which can increase the potential of Mg alloys to use in safety-critical application. Therefore, it can be concluded that FSP, as a process of sever plastic deformation at high temperature, has a great potential to tailor the microstructure and enhancing the mechanical properties of cast Mg alloys. Manuscript profile -
Open Access Article
55 - Investigation of Optimal Milling Conditions in the Production of Mg-3Zn-1Mn Nanocomposite
Saeid jabbarzare Hamid Reza Bakhsheshi Rad Amirabbas Nourbakhsh tahmine ahmadiOne approach for the preparation of Mg-3Zn-1Mn nanobiocomposite is powder metallurgy. After preparing the alloy by the milling process, hardening is conducted during the sintering process. The condition for obtaining high strength and corrosion resistance of as-sintered MoreOne approach for the preparation of Mg-3Zn-1Mn nanobiocomposite is powder metallurgy. After preparing the alloy by the milling process, hardening is conducted during the sintering process. The condition for obtaining high strength and corrosion resistance of as-sintered specimens is the uniform distribution of zinc and manganese elements in the magnesium matrix and the maximum particle size reduction to increase the surface area. In this research, under certain conditions, the milling process has been conducted to fabricate this nanocomposite. The result of XRD analysis exhibited that the optimal sample is obtained after 25 h milling. At this time, the grain size was 27 μm, and the crystallite size was 24 nm. Evaluation of X-ray diffraction (XRD), X-ray fluorescence (XRF), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), and field emission scanning electron microscopy (FE-SEM) results for samples shows uniform distribution of zinc and manganese particles in the matrix of magnesium and confirms the reduction of particle size with spherical shape for nanobiocomposite specimens. Manuscript profile -
Open Access Article
56 - Comparative Study of the Effects of Strontium and Magnesium Ions on Physical and Chemical Properties of Calcium Phosphate-Gelatin Biomimetic Scaffolds in Bone Tissue Engineering
Amirhossein Moghanian Majid Raz Fathollah MoztarzadehIn this study, biomimetic scaffolds were designed to study the formation of calcium phosphate deposits by using a double diffusion method into gelatin hydrogel in temperature and pH similar to body conditions. Moreover, the effect of magnesium (Mg) and strontium (Sr) io MoreIn this study, biomimetic scaffolds were designed to study the formation of calcium phosphate deposits by using a double diffusion method into gelatin hydrogel in temperature and pH similar to body conditions. Moreover, the effect of magnesium (Mg) and strontium (Sr) ions on properties was investigated. Five different types of specimens with different Sr and Mg ions percentage were synthesized and then porous scaffolds were prepared by freeze-drying method. The scaffolds microstructures were examined by scanning electron microscopy (SEM), which showed a smooth and needle-shaped surface of specimens. Fourier transform infrared spectroscopy (FTIR) results indicated the presence of phosphate and hydroxyl bonds in the structure of the scaffolds, due to the formation of calcium phosphate phases such as HA. The presence of metal ions in the structure caused the displacement of the peaks in X-ray diffraction (XRD) analysis and lattice parameters. Additionally, osteoblast cell culture results also demonstrated M10 and S10 specimens had proper biocompatibility. Additionally, alkaline phosphate (ALP) activity revealed the optimal amount of 10 mol. % Mg and Sr (M10 and S10), which led to the significantly (**p< 0.01, ***p <0.001) growth, proliferation, and differentiation of 292G osteoblasts cells in scaffolds. Moreover, the presence of calcium phosphate improved the biological properties of the specimens. Finally, the results of various analyses confirmed the high capability of the synthesized scaffold as a promising substitute for bone tissue. Manuscript profile -
Open Access Article
57 - The effect of pressure on the Mg alloy-Alumina composite properties fabricated by infiltration casting
Bahman Eghtedari Mahmoud Meratian Ali Maleki Mohamad KhodaeiOne of the advanced routes for manufacturing the magnesium-matrix composites is infiltration casting into ceramic foams. In this research, magnesium-matrix composite AZ91-Al2O3 production has been investigated. Therefore, AZ91 alloy molten is prepared by usage of torch MoreOne of the advanced routes for manufacturing the magnesium-matrix composites is infiltration casting into ceramic foams. In this research, magnesium-matrix composite AZ91-Al2O3 production has been investigated. Therefore, AZ91 alloy molten is prepared by usage of torch furnace under protection of MAGREX flux, then, poured in preheated mold at 250°C with preheated alumina foam at 800 °C. For investigating the effect of pressure, pressures at 50, 75 and 100 MPa in 1 minute applied until solidification was completed. For comparison, similar experiments were done without applying pressure. The results showed that solidification under pressure reduced porosity noticeably in comparison with gravity casting to 60%. By addition the ceramic reinforcement to the base alloy, mechanical strength reduced due to formation of MgAl2O4 spinel phase at interface and formation of residual compression stresses because of thermal mismatch between matrix and reinforcement. The mechanical strength and ductility of the samples are increased by rising of applied pressure to (0-100 MPa) due to decrease grain size and better strength interface of alumina and alloy. Additionally, wear rate due of composite decreased in comparison to base alloy declined markedly (about 53%). This may be due to higher intrinsic alumina strength. Also, by applying pressure on molten metal during solidification, wear rate is noticeably lesser than similar gravity sample due to decreasing the grain size and markedly declining the porosity. The dominant mechanism for base alloy is adhesive wear and for composite is abrasive wear and delamination. Manuscript profile -
Open Access Article
58 - The Effect of Magnesium Oxide Nanoparticles on Oxidative Stress in a Parkinson's Model of Male Rats
Hoda Ghorbani moghaddam Akram Eidi Pejman Mortazavi Shahrbanoo OryanSince limited studies have evaluated the antioxidant effects of magnesium oxide nanoparticles on Parkinson's disease, the aim of this study is to investigate the effect of magnesium oxide nanoparticles (MON) on oxidative stress in the Parkinson's model in mice. In this MoreSince limited studies have evaluated the antioxidant effects of magnesium oxide nanoparticles on Parkinson's disease, the aim of this study is to investigate the effect of magnesium oxide nanoparticles (MON) on oxidative stress in the Parkinson's model in mice. In this experimental study, 54 adult male rats were divided into nine groups of six, including: healthy control group, parkinsonian control group receiving 6-hydroxydopamine in the lateral ventricle, sham group receiving normal saline and healthy experimental group receiving magnesium oxide nanoparticles in doses of 2.5, 5 and 10 mg/kg and experimental Parkinson's groups that in addition to inducing Parkinson's, received magnesium oxide nanoparticles in doses of 2.5, 5 and 10 mg/kg. Administration of nanoparticles was intraperitoneal for 30 days. After that, oxidative stress parameters MDA, CAT and SOD were measured in the brain tissue. The results of the present study showed that treatment with magnesium oxide nanoparticles significantly reduced the amount of oxidative stress parameters in the brain tissue (p < 0.05). Magnesium oxide nanoparticle treatment in doses of 5 and 10 mg/kg decreased MDA in parkinsonian groups compared to parkinsonian control animals. Also, the treatment of magnesium oxide nanoparticles in doses of 5 and 10 mg/kg in the parkinsonian group caused a significant increase in the activity of SOD and CAT enzymes compared to parkinsonian control animals. As a result, it can be said that magnesium oxide nanoparticle can play a promising role with its effectiveness in reducing oxidative stress processes in Parkinson's model. Manuscript profile -
Open Access Article
59 - Evaluation of the Effect of Mmagnesium Oxide Nanoparticles on Gad2 Gene Expression in the Hippocampus of Male Rats in the Presence and Absence of Acute Motor Restriction Stress
Masoomeh Esmipoor Zohreh ValizadehStress is a neurological condition that affects the nerves of all organisms by molecular processes. Magnesium oxide nanoparticles effectively reduce and relieve anxiety-like behaviors, but the molecular mechanism of this relationship has not yet been studied. Gad2 gene MoreStress is a neurological condition that affects the nerves of all organisms by molecular processes. Magnesium oxide nanoparticles effectively reduce and relieve anxiety-like behaviors, but the molecular mechanism of this relationship has not yet been studied. Gad2 gene encodes one of the isoforms of glutamate decarboxylase, an enzyme which converts glutamic acid to GABA (gamma amino butyric acid). In the present study, the effect of magnesium oxide nanoparticles on Gad2 gene expression in the hippocampus of male rats in the presence and absence of acute motor stress was investigated. 4 groups of male Wistar rats( control, receiving salin+stress, 5mg/kg Mg nanoxide, stress+ 5mg/kg Mg nanoxide) were prepared. RNA was extracted from hippocampal tissue. Then, cDNA synthesis and real-time were performed for all groups. The results showed that Gad2 gene expression was significantly (p<0.01) increased in the presence of magnesium nanoxide, especially in the group with acute motor stress compared to other groups. According to the findings, magnesium nanoxide enhances the inhibitory nervous system by enhancing the hippocampal enzyme glutamate decarboxylase. Additional research in this area will throw more light on this molecular connection. Manuscript profile -
Open Access Article
60 - Protective Effect of Magnesium Sulfate against Experimental Models of Gastric Ulcer in NMRI Mice
Roya Rostami Akram Eidi Pejman Mortazavi Shahrebano OryanGastric ulcers are common digestive disorders involving stomach mucosal lesions with worldwide prevalence. There are different reasons for peptic ulcers. One common reason among west societies is ethanol consumption. The aim of the present study is pretreatment by magne MoreGastric ulcers are common digestive disorders involving stomach mucosal lesions with worldwide prevalence. There are different reasons for peptic ulcers. One common reason among west societies is ethanol consumption. The aim of the present study is pretreatment by magnesium sulfate. In this study 66 male NMRI mice were randomly divided into 11 groups and the administered mice were followed up daily for 15 days. These groups include control group (intact), control ulcer group (ethanol 10 mg/kg), standard group (omeprazole 40 mg/kg and ethanol), experimental groups (magnesium sulfate 50, 100, 200, 300 mg/kg), and experimental ulcer groups (magnesium sulfate 50, 100, 200, 300 mg/kg and ethanol). At the end of the relevant period, the levels of oxidative stress parameters were biochemically evaluated. The results of this study revealed that the activity of catalase, glutathione peroxidase and superoxide dismutase in control ulcer group significantly decreased compared to the control group. Oral administration of magnesium sulfate produced no significant effect on catalase, glutathione peroxidase and superoxide dismutase activities in intact animals. Animals in experimental ulcer groups represented a great increase in catalase, glutathione peroxidase, and superoxide dismutase levels over the treatment by magnesium sulfate. Moreover, our results showed that the amount of malondialdehyde in control ulcer group was significantly increased compared to the control group. Pre-treatment with magnesium sulfate caused no significant change on the amount of malondialdehyde in control group, while the level of malondialdehyde was considerably decreased in experimental ulcer groups. Furthermore, our results demonstrated that a pretreatment with MgSO4 could notably reduce oxidative stress and gastric lesions. Manuscript profile -
Open Access Article
61 - بررسی تاثیر عملیات حرارتی بر خواص ریزساختاری ورق سه لایه آلومینیوم منیزیم- آلومینیوم خالص- فولاد زنگ نزن
داوود میراحمدی ابوالفضل غلام زادهفلزات روکشی، مواد فلزی دو یا چند لایه ای می باشند. امروزه فلزات روکشی به طور گسترده در صنعت کاربرد دارند. این ورق ها راهحل های موثری در عملکرد یا صرفه جویی هزینه و یا هر دو ایجاد می کنند. عملکرد فلزات روکشی بنا به کاربردهایشان به کاربردهای ساختمانی، تنظیمات انبساط حرار Moreفلزات روکشی، مواد فلزی دو یا چند لایه ای می باشند. امروزه فلزات روکشی به طور گسترده در صنعت کاربرد دارند. این ورق ها راهحل های موثری در عملکرد یا صرفه جویی هزینه و یا هر دو ایجاد می کنند. عملکرد فلزات روکشی بنا به کاربردهایشان به کاربردهای ساختمانی، تنظیمات انبساط حرارتی، کنترل های ترمومکانیکی (ترموستات)، الکتریکی، مغناطیسی، مقاوم به خوردگی، اتصال دهی و تزیینی تقسیم می شود. در هر گروه عملکردی، ممکن است چندین سیستم فلز روکشی حضور داشته باشد.در پژوهش حاضر با استفاده از فرآیند اتصال نوردی، ورق سه لایه آلومینیوم منیزیم- آلومینیوم خالص- فولاد زنگ نزن تولید شد. استحکام پیوند در حالت های مختلف با استفاده از آزمون کشش بررسی شد و با تحلیل تصاویر میکروسکوپ نوری استریو و میکروسکوپ الکترونی روبشی(FE-SEM)، کیفیت پیوند مورد ارزیابی قرار گرفت. از سطح مقطع پیوند در شرایط مختلف نمونه های نورد شده و آنیل شده عکس برداری گردید. به منظور تعیین بهترین شرایط تولید ورق چند لایه، اثر پارامتر های فرآیند اتصال نوردی مورد بررسی قرار گرفت. تغییرات خواص مکانیکی در حالت های مختلف توسط آزمون کشش طبق استاندارد مجازASTM E8M انجام گردید. بررسی ها نشان داد که با آنیل نمونه ها در دماهای بالای 375 درجه سانتیگراد برای آلومینیوم، استحکام پیوند افزایش قابل توجهی نسبت به نمونه های نورد شده داشته است. Manuscript profile -
Open Access Article
62 - Investigating the effect of solid solution treatment on the corrosion properties of biodegradable Mg-Zn-RE-xCa (x = 0, 2.5) alloy
Saeed Alibabaei Masoud Kasiri-Asgarani HamidReza Bakhsheshi-Rad -
Open Access Article
63 - ارائه یک مدل جدید پیش بینی عمر خستگی کم چرخه آلیاژ منیزیم براساس روش انرژی کرنش پلاستیک تصحیح شده
محمد آزادی غلامحسین فرهیامروزه تکنولوژی به سمت استفاده از موادی همچون آلیاژهای منیزیم، با نسبت استحکام به وزن بالا در قطعات موتوری، تمایل دارد. بطور معمول، از انواع چدن و آلیاژهای آلومینیوم در ساخت سرسیلندر و بلوک سیلندر موتورها استفاده می­شود. اما آلیاژهای منیزیم، خواص فیزیکی و مکانیکی نز Moreامروزه تکنولوژی به سمت استفاده از موادی همچون آلیاژهای منیزیم، با نسبت استحکام به وزن بالا در قطعات موتوری، تمایل دارد. بطور معمول، از انواع چدن و آلیاژهای آلومینیوم در ساخت سرسیلندر و بلوک سیلندر موتورها استفاده می­شود. اما آلیاژهای منیزیم، خواص فیزیکی و مکانیکی نزدیکی به آلیاژهای آلومینیوم داشته و تا حدود 40 درصد وزن را کاهش می­دهند. در این مقاله، یک مدل جدید پیش­بینی عمر خستگی کمچرخه برای آلیاژ منیزیم، بر اساس روش انرژی ارائه شده و به جهت تدوین آن، از نتایج آزمون خستگی کمچرخه روی نمونه­های منیزیمی استفاده شده است. این مدل در مقایسه با دیگر تئوریهای موجود، از پارامترهای مادی کمتری برخوردار است و دارای دقت مناسب­تری می­باشد؛ چراکه در روش انرژی، از رابطه عمر- کار پلاستیک که معادل با ضرب همزمان عددهای تنش و کرنش پلاستیک می­باشد، استفاده می­شود. با توجه به خواص نرم شوندگی آلیاژهای منیزیم و آلومینیوم, انرژی کرنش پلاستیک می­تواند انتخاب مناسبی باشد؛ چراکه در چرخه بارگذاری خستگی، عدد حاصل ضرب تنش در کرنش پلاستیک می­تواند ثابت بماند. همچنین، اثر تنش میانگین بصورت یک ضریب تصحیح در مدل پیش­بینی عمر خستگی کمچرخه اعمال شده است. نتایج حاصل از مدل ارائه شده، تطابق خوبی را با نتایج آزمون نشان می­دهد. Manuscript profile -
Open Access Article
64 - بررسی تأثیر انفوزیون سولفات منیزیوم در اتاق عمل در ایجاد بی دردی پس از عمل جراحی کیسه صفرا به روش لاپاراسکوپیک
Mojgan Raisi Vahid Naghferati Fatemeh Broomand Jahed avalIntroduction: Postoperative pain is a complex physiologic reaction to tissue injury. Postoperative analgesia by medical and nonmedical methods improves the clinical outcomes, prevents complications, economizes health services and improves patients life quality. Purpose MoreIntroduction: Postoperative pain is a complex physiologic reaction to tissue injury. Postoperative analgesia by medical and nonmedical methods improves the clinical outcomes, prevents complications, economizes health services and improves patients life quality. Purpose of this study is to evaluate the effect of Magnesium Sulphate infusion in operative room on pain relief after laparascopic cholecystectomy. Methods and Material: In this clinical trial, 40 patients of laparascopic cholecystectomy with ASA I and II and age range of 30-60 years, without any operation on bile cyst presented in the hospital. After obtaining consent, the patients devided in two groups. Magnesium (M) group received 50 mg/kg Magnesium Sulphate intravenously in 100 cc Normal Saline 0.9% and the control (C) group received 100 cc Normal Saline 0.9% after intubation. Evaluation of arterial blood pressure, heart rate and pulse oxymetry before infusion of Magnesium Sulphate or Normal Saline, 15 minutes after infusion begin and at the operation end, performed. Pain measured in rest and coughing in 6 and 12 hours after anesthesia end by VAS (Visual Analogue Scale) and dose of opium drug used in recovery, 0-6 and 7-12 hours after anesthesia end, measured then recorded in questionnaire. After gathering information, opium drug dose used and VAS index, in two groups compared in hours listed above and statistically analyzed. Results: In our study there was not significant difference between two groups in age and sex (P>0.05). Pain in rest and coughing in 6 and 12 hours after anesthesia end did not have significant difference between two groups (P>0.05) and sex and age did not have statistically effect on it. The two groups which we studied did not have important difference in dose of opium used in recovery, 0-6 and 7-12 hours after anesthesia end (P>0.05). Also systolic and diastolic blood pressure and arterial oxygen saturation between two groups did not have significant difference before infusion, 15 minutes after infusion begin and at the end of infusion (P>0.05). But the heart rate average at the end of infusion, in Magnesium Sulphate group (84.1 ± 9.6) was more than Normal Saline (77.2 ± 7.6) group (P= 0.004). Conclusion: In general, in the present study it is said that prescription of 50 mg/kg Magnesium Sulphate in operation room does not have effect on pain and dose of opium drug used after laparascopic cholecystectomy and also does not lead to change in systolic and diastolic blood pressure and arterial oxygen saturation compared with control group, during and at the end of this operation. But only causes significant increase in heart rate compared with control group, at the end of operation. Manuscript profile -
Open Access Article
65 - The effect of various amounts of humic chelate magnesium and gibberellic acid on yield and yield components of cowpea
Sami Saadi Tayeb Saki NejadThe present study intended to investigate the effect of different doses of Humic Magnesium Chelate and Gibberellin on cowpea’s growth trend and production components under field conditions in Shadegan in Summer 2014. To this end, a factorial experiment in a random MoreThe present study intended to investigate the effect of different doses of Humic Magnesium Chelate and Gibberellin on cowpea’s growth trend and production components under field conditions in Shadegan in Summer 2014. To this end, a factorial experiment in a randomized complete block design with three replications was conducted. The first factor included Humic Magnesium Chelate at three levels (0, 200 & 400 ml.h) and the second factor included Gibberellin at three levels (0, 150 & 300 ppm). Results of variance analysis showed that interaction between humic acid and gibberellic acid on number of pods per plant, seeds per pod, seed weight and biological yield was significant at %5 level, grain yield and harvest index was significant at %1 level. the highest grain yield was associated with the treatment of Humic Magnesium Chelate 200 ml.h and Gibberellin 150 ppm by 2.720 kg.ha; on the contrary, The lowest grain yield was observed in the control treatment by 1,950 kg.ha. Besides, the highest HI belonged to the treatment of Humic Magnesium Chelate 200 ml.h and Gibberellin 150 ppm by %40 while the lowest HI was related to the treatment of Humic Magnesium Chelate 400 ml.h and Gibberellin 300 ppm by %28. To conclude, the results of the current research showed that the effect of Gibberellin treatment was higher on different doses of measured traits than Humic Magnesium Chelate treatment; and the application of Humic Magnesium Chelate 200 ml.h and Gibberellin 150 ppm was more effective on grain yield, yield components in comparison to the consumption of the higher concentration doses. Manuscript profile -
Open Access Article
66 - Effect of different amounts of humic chelate magnesium and Gibberellins on the growth and yield of cowpea
Sami Saadi Tayeb Saki NejadThe present study intended to investigate the effect of different doses of Humic Magnesium Chelate and Gibberellin on cowpea’s growth trend and production components under field conditions in Shadegan in summer 2014. To this end, a factorial experiment in a random MoreThe present study intended to investigate the effect of different doses of Humic Magnesium Chelate and Gibberellin on cowpea’s growth trend and production components under field conditions in Shadegan in summer 2014. To this end, a factorial experiment in a randomized complete block design with three replications was conducted. The first factor included Humic Magnesium Chelate at three levels (0, 200 & 400 ml.h) and the second factor included Gibberellin at three levels (0, 150 & 300 ppm). The results indicated that spraying the plants with Humic Magnesium Chelate 400 ml.h and Gibberellin 300 ppm increased leaf Area Index (LAI) and Total Dry Weight (TDW). Whereas, in terms of Crop Growth Rate (CGR), spraying with Humic Magnesium Chelate 200 ml.h and Gibberellin150 ppm increased Regular Growth Rate (RGR) and Net Assimilation Rate (NAR). According to the results of ANOVA, there was a significant difference between different levels of Humic Magnesium Chelate in grain yield %5 probabilities Level. The difference between the different levels of Gibberellin, grain yield was significant at the 1% level. As well as the interaction between hormones, grain yield was significant at the 1% level. Furthermore, the highest grain yield was associated with the treatment of Humic Magnesium Chelate 200 ml.h and Gibberellin 150 ppm by 2,720 kg.ha; on the contrary, the lowest grain yield was observed in the control treatment by 1.950 kg.ha. To conclude, the results of the current research showed that the effect of Gibberellin treatment was higher on different doses of measured traits than Humic Magnesium Chelate treatment; and the application of Humic Magnesium Chelate 200 ml.h and Gibberellin 150 ppm was more effective on grain yield, yield components and physiological indices in comparison to the consumption of the higher concentration doses. Manuscript profile
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