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Open Access Article
1 - A Study on the Effect of Nanosilicate-Based Coatings on Storage Life of Pomegranate Cultivar Malas-E-Saveh
A. Bekran E. Seifi F. VarastehIntroduction: The high nutritional and medicinal values and the increasing production anddemands, it is important to control the factors affecting the quality of pomegranate fruitduring storage. Regarding the understanding of how to store pomegranate fruit, it would bep MoreIntroduction: The high nutritional and medicinal values and the increasing production anddemands, it is important to control the factors affecting the quality of pomegranate fruitduring storage. Regarding the understanding of how to store pomegranate fruit, it would bepossible to offer this product at local and international markets for a long duration with highquality.Materials and Methods: In this study, the effect of nano silicate-based polyethylene andpolypropylene on the storage life of pomegranate fruit (cultivar Malas-e-Saveh) has beenstudied in a completely randomized factorial design. The treated fruits were stored in commonstorage for two and four months period. Qualitative and quantitative characteristics of fruitswere measured using the standard methods of analysis.Results: The results showed that the nano-based polyethylene and polypropylene couldmaintain the highest amount of moisture in the skin (75.72% and 73.14%, respectively) ascompared to the control (26.64%) at the end of storage period. These coating treatments alsomaintained the highest amount of aril moisture (76.88%) as compared to the control(71.09%). After storage period, the nano-based polypropylene showed the highestconcentrations of phenolic compounds (883.54 mg GAE/100 ml), flavonoids (487.71 mgGAE/100 ml) and anthocyanins (11.69 mg C3GE/100 ml) as compared to the control (649.76and 437.56 mg GAE/100 ml, and 7.9 mg C3GE/100 ml, respectively); although the normalcoating treatments showed less influence. Nano-based coating treatments also decreased thechanging rate of ascorbic acid but did not have any significant influence on pH and EC.Conclusion: The application of nano-based polyethylene and polypropylene treatments isrecommended to improve the keeping quality of pomegranate fruit during storage. Manuscript profile -
Open Access Article
2 - Adsorption of Nickel Ions from Aqueous Solutions using Immobilized Silica Nanoparticles onto Zeolite 13x
Tahere Mardani Elham AmeriBackground and Objective: Nano material has attracted much attention due to its functional groups and special properties. In this study, silica nanoparticles immobilized on zeolite 13X granules (SZX13), by sol gel method was synthesized. The aim of this study was determ MoreBackground and Objective: Nano material has attracted much attention due to its functional groups and special properties. In this study, silica nanoparticles immobilized on zeolite 13X granules (SZX13), by sol gel method was synthesized. The aim of this study was determination of the performance of prepared nano sorbent in nickel ions removal from aqueous solution. Material and Methodology:The present historical research, with an analytical-comparative approach, has used inferential and deductive reasoning. First, the principles of organic style architecture, derived from a comparative study of written evidence and existing documents, were explained as a criterion of measurement. Then, a list of works of organic architecture in Iran was prepared to select samples for analysis by purposive sampling. Finally, the analyzed samples were compared with the principles of organic architecture. Findings: Scanning Electron Microscope analysis showed that the immobilization process was successfully carried out and the immobilized particles has a nano size distribution. Optimized values for each factor to achieve the highest uptake were found to be as follows: The Ni initial concentration of 60 mg/L, the pH 6, the adsorbent (SZX13) dose of 1 g, at 40 ° C. Discussion and Conclusion: Results showed that the immobilization of nano particles on the zeolite not only led to that the particles were distributed in an expanded volume, but also prepare the accessible usage of that in an industrial scale. In addition, with immobilization of silica nanoparticles onto zeolite granules, the sorption of nickel ions were increased in comparison to that by using zeolite 13X, and the removal percentage was increased from %26 to %43.98. Manuscript profile -
Open Access Article
3 - Kinetics and Thermodynamics studies of Ni (II) adsorption by silica aerogel-activated carbon nanocomposite
Zohreh Saadati Mahmood ShoogardzadehAbstract Background and Objective: Presence of toxic heavy metals like nickel in water resources is a major environmental problem in many communities. Method: In this study, to stimulate the removal of Ni (II) from aqueous solution by silica aerogel-activated car MoreAbstract Background and Objective: Presence of toxic heavy metals like nickel in water resources is a major environmental problem in many communities. Method: In this study, to stimulate the removal of Ni (II) from aqueous solution by silica aerogel-activated carbon nanocomposite, the parameters affecting the adsorption process such as pH, amount of adsorbent, contact time, temperature and concentration were investigated and optimized. Findings: The results showed the maximum adsorption at pH= 5. The lower pH, the more H+ ion competing with the metal ion for adsorption sites. Kinetic studies indicated that the adsorption process followed the pseudo-second order kinetics. Moreover, the equilibrium data related to adsorption isotherms showed a superiority of the Langmuir isotherm compared to other models. Discussion and Conclusion: Calculation of thermodynamic factors, such as ΔG◦, ΔH◦ and ΔS◦, indicated that the adsorption process is spontaneous, endothermic and irreversible. The results showed that silica aerogel-activated carbon nanocomposite has been successfully employed for the removal of Ni (II) from aqueous solutions. Manuscript profile -
Open Access Article
4 - تاثیر محلولپاشی نمکهای سیلیسیم بر صفات مورفولوژیکی گل رز(Rosa hybrids) رقمgrand prix
زهرا ساکی الهام دانائی -
Open Access Article
5 - اثر محلولپاشی اسیدسالیسیلیک، سیلیکات پتاسیم و الیسیتور قارچی در شرایط تنش شوری بر گیاه همیشه بهار (Calendula officinalis L.)
نرگس حسینی فر وحید عبدوسی وحید زرین نیا -
Open Access Article
6 - Synthesis of Silica Aerogel from Rice Husk by Ambient Pressure Drying
M. Ahmadi Daryakenari A. Ahmadi Daryakenari M. Hajian Heidary -
Open Access Article
7 - Synthesis of New Titania-Silica-Iron nanocomposite for Photocatalytic Degradation of Methyl Orange as a Water Pollutant Model
M. Saeedfar M. Sadeghpour V. Tajer -
Open Access Article
8 - Synthesis and Characterization of Mono-dispersed Spherical Silica Nanoparticles
M. Kazemzadeh-Otoufi N. Shahtahmasebi A. Kompani E. Goharshadi -
Open Access Article
9 - Production of Polyvinyl Alcohol/Silica Nano-Composite Membrane for Evaluation of Permeability Properties of CO2/CH4
M. Rahbar B. Kamyab-Moghadas -
Open Access Article
10 - Feasibility of Producing Superhydrophobic Antibacterial Nanocomposite Coatings Containing Nanoparticles of Titanium Dioxide and Silica
B. Hajalizadeh A. Rahi S.A. Manafi A. Rahi -
Open Access Article
11 - A Study on the Effect of Filler Particle Size and Various Combinations on the Crashworthiness of Square Thin-Walled Structures made of Epoxy/Silica Composites
M. Shariati G. Farzi A. Dadrasi -
Open Access Article
12 - The effect of synthesis parameters on the particle size, particle size distribution and hydrodynamic diameter of silica nanoparticles via modified StÖber method
G. Ragheb N. Najmoddin M. Aleemardani -
Open Access Article
13 - The Effect of Surfactant concentration on the Drug Delivery Properties of the Nanoporous Silica Prepared in the Alkaline Environment
N. Khamsehashari S.A. Hassanzadeh-Tabrizi -
Open Access Article
14 - Preparation of Polypyrrole/Nanosilica Nanocomposite for Removal of Acid Blue 62 from Aqueous Media: Modeling with Adaptive Neural-Fuzzy Inference System
K. Aghajani H. A‎llah-Tayebi -
Open Access Article
15 - Investigation on the Effects of Nano-Silica and Titanium Oxide Composite Content and Processing Temperature on the Hydrophobic Properties of Concrete
S.A. Manafi A. Alipour -
Open Access Article
16 - Structure Evaluation and Characterization of Nano-silica aerogel by Sol-gel Method
F. Mirjalili S.A. Manafi E. Rajabi B. Foroutan -
Open Access Article
17 - Synthesis of Silica-Calcium Zirconate Nanocomposite and Evaluating of its Photocatalytic Decolorization of Methylene Blue
N. Kermani M. Kargar-Razi S.S. Mirzaee -
Open Access Article
18 - Synthesis of chitosan/silica/fipronil nanoparticles and its effect on termite Microcerotermes gabrielis W. for sustained release
V. Derakhsh Ahmadi Z. Rafiei-karahroudi Shila Goldasteh Elham Sanatgar B. Heidary AlizadehToday, Water base nanopesticides with small size can help to over comes the low solubility of pesticides to control pest in agriculture. In this paper, an oil-core silica/ polymer/ fipronil shell nanoparticles was prepared for insecticidal activity of fipronil in vitro MoreToday, Water base nanopesticides with small size can help to over comes the low solubility of pesticides to control pest in agriculture. In this paper, an oil-core silica/ polymer/ fipronil shell nanoparticles was prepared for insecticidal activity of fipronil in vitro was tested against termite (Microcerotermes diversus Silvestri (Isoptera: Termitidae)), which, the result of the biological activity showed the effectiveness of fipronil nanparticles during 72 h at 15 ppm and make tunneable activity of fipronil insecticide. Manuscript profile -
Open Access Article
19 - Investigation of the effect of silica nanoparticles with the pathogenic fungus Beauveria bassiana on the greenhouse whitefly, Trialeurodes vaporariorum Westwood
SEYYED KAZEM Vahedi A. Hoseinzadeh Akbar Ghassemi-KahrizehIntroduction: Greenhouse whitefly, as an economic pest, has a wide and ubiquitous host range and causes great damage to many crops, including greenhouse plants. Due to the morphological characteristics and potential of resistance to chemical toxins, it is necessary to f MoreIntroduction: Greenhouse whitefly, as an economic pest, has a wide and ubiquitous host range and causes great damage to many crops, including greenhouse plants. Due to the morphological characteristics and potential of resistance to chemical toxins, it is necessary to find suitable and compatible compounds for integrated control of this pest by increasing the effect and minimizing the adverse effect on the pathogenic fungus Beauveria bassiana.Methods: In this study, the effect of pathogenic fungus Beauveria bassiana alone and in combination with silica nanoparticles against second instar seeds and nymphs of Trialeurodes vaporariorum Westwood and germination power of pathogenic fungi using probit analysis, one-way analysis of variance and ANOVA SPSS software was examined.Results: LC50 values obtained from probit degradation as a result of the effect of different concentrations of silica nanoparticles and Beauveria bassiana against eggs after 7 days and against second instar nymph after 72 hours (643.97 mg / L and 170399 conidia/ ml) and (602.952 mg / L and 78379 conidia/ ml) were obtained, respectively.Results: According to the results of the present study, silica nanoparticles alone have higher toxicity than other treatments and in combination with B. bassiana can be used in integrated control of the important greenhouse whitefly pest. The most important advantage of using these compounds is their compatibility with the environment and the lack of resistance to insects against them. Manuscript profile -
Open Access Article
20 - Insecticidal effect of silica and silver nanoparticles on the cowpea seed beetle, Callosobruchus maculatus F. (Col.: Bruchidae)
M. Rouhani M. A. Samih S. KalantariNanotechnology has become one of the most promising new approaches for pest control in recent years. In our screening program, laboratory trials were conducted to determine the effectiveness of silica nanoparticles (SNP) and silver nanoparticles (AgNP) on larval stage a MoreNanotechnology has become one of the most promising new approaches for pest control in recent years. In our screening program, laboratory trials were conducted to determine the effectiveness of silica nanoparticles (SNP) and silver nanoparticles (AgNP) on larval stage and adults of Callosobruchus maculatus on cowpea seed. Nanoparticles of silica and silver were synthesized through a solvothermal method and different concentrations (1, 1.5, 2 and 2.5 g kg-1) of them were tested on C. maculatus. In the experiments, the LC50 value for SiO2 and Ag nanoparticles were calculated 0.68 and 2.06 g kg-1 cowpeas on adults and 1.03 and 1.00 g kg-1 on larvae, respectively. Result showed that, the both nanoparticles (silica and silver) were highly effective on adults and larvae with 100% and 83% mortality, respectively. The result also showed that SiO2 nanoparticles can be used as a valuable tool in pest management programs of C. maculatus. Manuscript profile -
Open Access Article
21 - اثر رژیمهای کم آبیاری و نانوذرات سیلیکا بر عملکرد و شاخص بهرهوری آب در گیاه کاهو (Baby lettuce Vivian)
شکور طافی عبدالرحیم هوشمند ناصر عالم زاده انصاریرشد جمعیت و افزایش مشکلات زیست محیطی، تقاضای آب آبیاری در بسیاری از مناطق جهان را افزایش داده است. فناوری نانو تاثیرات زیادی در تولید پایدار محصولات کشاورزی داشته و می‎تواند خطرات زیست محیطی را کاهش داده و فرصت‎هایی برای تولید محصولات جدید فراهم کند. این تحقیق ب Moreرشد جمعیت و افزایش مشکلات زیست محیطی، تقاضای آب آبیاری در بسیاری از مناطق جهان را افزایش داده است. فناوری نانو تاثیرات زیادی در تولید پایدار محصولات کشاورزی داشته و می‎تواند خطرات زیست محیطی را کاهش داده و فرصت‎هایی برای تولید محصولات جدید فراهم کند. این تحقیق با هدف بررسی عملکرد و بهره­وری مصرف آب تحت شرایط رژیم­های کم­آبیاری و نانوذره سیلیکا انجام شد. مطالعه حاضر بر روی گیاه کاهو رقم baby lettuce Vivian در سه سطح ­آبیاری 75، 85 و 100 درصد نیاز آبی گیاه، سه سطح کاربرد نانوذره شامل: 0، 50 و 100 میلی­گرم بر لیتر به صورت تغذیه ریشه­ای در سه تکرار انجام شد. این طرح در قالب کرت­های خرد شده نواری و با طرح پایه بلوک­های کامل تصادفی تحلیل شد. براساس نتایج، بیش­ترین میزان پارامتر عملکرد کل به ترتیب در تیمار I100F100برابر 88/87 گرم بر بوته و کم­ترین میزان در تیمار I85F50با 47 گرم بر بوته به ثبت رسید. هم­چنین بالاترین عملکرد زیست­توده در تیمار I100F50 ثبت شد که برابر 33/61 گرم بر بوته بود و پایین­ترین عملکرد زیست­توده نیز در تیمار I75F100 گزارش گردید که برابر 26 گرم بر بوته بود. تیمار I100F50 با 53/20 کیوگرم بر مترمکعب بیش‎ترین بهره­وری مصرف آب را داشت. بالاترین و پایین­ترین شاخص برداشت در این پژوهش، به­ترتیب برابر 68/74 و 61/52 درصد بود. Manuscript profile -
Open Access Article
22 - A review on the synthesis of silica nanoparticles and their applications in environmental remediation
Mehrab Fallahi-Samberan Samaneh KhodadadiEnvironmental remediation deals with the removal of contaminants from environment for maintaining and restoring the quality of soil, water, and air and, more in general, for protecting human health. At present, a wide range of silica products is manufactured for applica MoreEnvironmental remediation deals with the removal of contaminants from environment for maintaining and restoring the quality of soil, water, and air and, more in general, for protecting human health. At present, a wide range of silica products is manufactured for applications in microelectronics, medicine, pharmacy and so on. A more ambitious use of nanosilicas is remediation of contaminated environments and, recently, their application in wastewater treatment has emerged as a fast-developing and attractive area of interest. Because of high surface area, silica nanoparticles show a very good adsorption capacity and a large specific reactivity. Recent studies have shown that hydrophilic and hydrophobic silica nanoparticles are very efficient in removing pollutants such as dyes, metallic species, and pesticides from water, and wastewaters. Another interesting benefit of silica nanoparticles as adsorbents is that they are considered non-toxic and not harmful to the environment. Moreover, nanosilica based technology shows an attractive cost-effectiveness ratio as it requires relatively cheap processing of raw materials. This paper has reviewed the recent progresses in remediation by silica nanoparticles and their synthesis methods. Manuscript profile -
Open Access Article
23 - Antibacterial property of silica-supported Zinc Oxide prepared by molten salt
M. GhorbanpourThe aim of this study was to introduce a new method for producing ZnO/silica gel nanocomposites ZnO/silica gel. Nanocomposites were synthesized by inserting silica gels in a molten bath of zinc sulfate (at 560 °C) for different contact times. Except for zinc sulfate MoreThe aim of this study was to introduce a new method for producing ZnO/silica gel nanocomposites ZnO/silica gel. Nanocomposites were synthesized by inserting silica gels in a molten bath of zinc sulfate (at 560 °C) for different contact times. Except for zinc sulfate, no reduction agent or chemical material was used for the preparation of nanocomposite. In this method, synthesis of nanoparticles and their immobilization on the substrate were carried out in a period of time less than 60 minutes. The ZnO/silica gel nanocomposites were studied by scanning electron microscopy (SEM) and UV–visible diffusive reflectance spectrometer (UV–Vis DRS). The SEM micrograph showed that the contact of silica gel with molten salt resulted in the formation of nanoparticles on the silica gel surface. On the other hand, by increasing the contact time, ZnO nanoparticles loading was increased. The antibacterial test against E. coli revealed that nanocomposites produced by 60 min contact duration, reached a mortality rate of 99.85%. The leaching test demonstrated the stability of the nanocomposites, and the delivery of zinc in water was less than 1.5% for all samples. Manuscript profile -
Open Access Article
24 - Silica photonic crystal fiber structure in order to simplify the process of making them
Ashkan Ghanbari Mehran NikooIn this research, a new structure of photonic crystal fibers(PCFs) will be proposed,in which instead of using the aire- holes in the cladding region, the flourine(2%) doped solid silica rods in order to reduce the problems associated with deformities of air-holes in the MoreIn this research, a new structure of photonic crystal fibers(PCFs) will be proposed,in which instead of using the aire- holes in the cladding region, the flourine(2%) doped solid silica rods in order to reduce the problems associated with deformities of air-holes in the cladding region will be used.Also, in the following, a few of the propagation charactristics of the proposed Photonic Crystal Fiber with a conventional silica Photonic Crystal Fiber such as, Normalized frequency,effective refractive index,total dispersion and higher order dispersions ( Group velocity dispersion and Third Order Dispersion) will be analyzed and compared. Finally it will be observed that, the proposed PCF structure is much simpler than the conventional one in the fabrication process. But they are not suitable for femtosecond solitons propagation .Also, it will be shown that, the situation of the conventional Photonic Crystal Fiber is much better than the proposed structure in the femtosecond optical solitons propagation. Manuscript profile -
Open Access Article
25 - Grape Seed Extract Loaded Amino Functionalized SBA-15 Mesoporous Silica Nanoparticles as a potential drug delivery System: Antibacterial activity and release kinetics studies
Mahdi Shahriarinour Faten Divsar Zahra Nazari ShadMesoporous silica nanoparticles (MSNs) are used as efficient carrier candidate for the delivery of bioactive molecules, proteins, and drugs because of their properties such as safety, stability, biocompatibility, high surface area, and controllable pore sizes with narro MoreMesoporous silica nanoparticles (MSNs) are used as efficient carrier candidate for the delivery of bioactive molecules, proteins, and drugs because of their properties such as safety, stability, biocompatibility, high surface area, and controllable pore sizes with narrow distribution and facile surface modification. MSNs demonstrate high encapsulation capability for both hydrophilic and hydrophobic drugs. In this study, SBA-15 MSN was synthesized by hydrothermal method in acidic media and functionalized by post-grafting method using 3-aminopropyltriethoxysilane. The efficiency of amino-functionalized SBA-15 MSN (SBA-15-NH2) was investigated for the loading and release of grape seed extract (GSE). The disc diffusion assay indicated GSE and GSE loaded on SBA-15-NH2 (SBA-15-NH2@GSE) at the concentration of 32 mg/ml extract per disc resulted in the inhibition zone of 24 mm and 15 mm for S. aurous and 22 mm and 13 mm for E. coli, respectively. The antibacterial effect improved by increasing the concentration of GSE loaded into SBA-15-NH2 from 2 to 32 mg/ml. These results indicate that SBA-15-NH2@GSE owns a strong antibacterial potential valuable for the pharmaceutical industry. Manuscript profile -
Open Access Article
26 - Optimization of Pectinase Enzyme Immobilization on Silica Aerogel and Its Application in the Extraction of Phenolic Compounds of Grape Pomace
Ismaeil Faramarzi Agh Gonbad Leila Amirkhani Seyyed Mahdi Hedayat Zadeh Fahimeh Derakhshan Fard -
Open Access Article
27 - تاثیر محلولپاشی سیلیکون بر واکنشهای فیزیولوژیکی داوودی (Dendranthema ×grandiflorum) در دو مرحله رشد مختلف
هادی حاجی زاده زهره جبارزاده این پژوهش برای ارزیابی واکنش های فیزیولوژیکی داوودی به محلولپاشی سیلیکون در شرایط بدون تنش انجام شد. این پژوهش به صورت دو آزمایش جداگانه (در مرحله 5-4 برگی و 12-8 برگی) به صورت فاکتوریل در قالب طرح کاملا تصادفی با دو فاکتور نوع سیلیکون (در دو نوع: سیلیکات سدیم و س More این پژوهش برای ارزیابی واکنش های فیزیولوژیکی داوودی به محلولپاشی سیلیکون در شرایط بدون تنش انجام شد. این پژوهش به صورت دو آزمایش جداگانه (در مرحله 5-4 برگی و 12-8 برگی) به صورت فاکتوریل در قالب طرح کاملا تصادفی با دو فاکتور نوع سیلیکون (در دو نوع: سیلیکات سدیم و سیلیکات کلسیم) و غلظت سیلیکون (در 5 غلظت صفر، 50، 100، 150 و 200 میلی گرم در لیتر) در محیط کشت کوکوپیت- پرلیت (به نسبت حجمی 1:1) با 4 تکرار و 2 مشاهده انجام شد. ویژگی های فیزیولوژیکی نظیر فعالیت آنزیم های کاتالاز، آسکوربات پراکسیداز، گایاکول پراکسیداز، میزان پرولین، مالون دی آلدئید و پراکسید هیدروژن اندازه گیری شدند. نتایج این پژوهش نشان داد که محلولپاشی با سیلیکات سدیم و کلسیم، میزان مالون دی آلدئید و فعالیت آنزیم های کاتالاز، آسکوربات پراکسیداز و گایاکول پراکسیداز را افزایش داد ولی پرولین و پراکسید هیدوژن کاهش یافتند. در کل، در مرحله 12-8 برگی، غلظت های زیاد سیلیکات سدیم (150 و 200 میلی گرم در لیتر) در افزایش فعالیت آنزیم های آنتی اکسیدانی و کاهش میزان پرولین، مالون دی آلدئید و پراکسید هیدروژن موثرتر بود. در مرحله 5-4 برگی، سیلیکات سدیم با غلظت 100 میلی گرم در لیتر، فعالیت آنزیمهای آنتی اکسیدانی را افزایش داد و سیلیکات کلسیم با غلظت 150 میلی گرم در لیتر، میزان پرولین، مالون دی آلدئید و پراکسید هیدروژن را کاهش داد. Manuscript profile -
Open Access Article
28 - تاثیر سیلیسیم بر شاخص های رشد و کاهش خسارت بیماری سفیدک پودری آهار (Zinnia elegans Jacq. ʻMagellanʼ)
مریم میرصفای مقدم محمد نقی پاداشت دهکاییبه منظور بررسی اثرات سیلیسیم بر شاخص‏های رشد و کاهش خسارت بیماری سفیدک پودری آهار (Zinnia elegans Jacq. ʻMagellanʼ)، آزمایشی به صورت فاکتوریل در قالب طرح بلوک‏های کامل تصادفی با دو عامل در هشت تیمار و سه تکرار انجام گرفت. عامل اول، غلظت سیلیسیم در چهار سطح شامل Moreبه منظور بررسی اثرات سیلیسیم بر شاخص‏های رشد و کاهش خسارت بیماری سفیدک پودری آهار (Zinnia elegans Jacq. ʻMagellanʼ)، آزمایشی به صورت فاکتوریل در قالب طرح بلوک‏های کامل تصادفی با دو عامل در هشت تیمار و سه تکرار انجام گرفت. عامل اول، غلظت سیلیسیم در چهار سطح شامل 0، 50، 100، 150 میلی‏گرم بر لیتر و عامل دوم، روش کاربرد در دو سطح شامل محلول‏پاشی و خاکی بود. بر اساس غلظت و روش کاربرد سیلیسیم با کاربرد این ماده، چندین شاخص باغبانی گیاه بهبود یافت. میزان سیلیسیم گیاهان تیمار شده (100 و 150 میلی­گرم بر لیتر سیلیسیم به روش محلول پاشی) در مقایسه با گیاهان شاهد به طور معنی­داری افزایش یافت. شدت بیماری سفیدک پودری با کاربرد سیلیسیم کاهش یافت. نتایج مطالعه ما ثابت کرد که تیمارهای محلول پاشی نسبت به تیمارهای خاکی تاثیر بیشتری در کنترل بیماری دارند. Manuscript profile -
Open Access Article
29 - Effect of quartz filler with fluoride-containing barium aluminosilicate on the mechanical properties of light-cured dental composites based on Bis-GMA/UDMA/TEGDMA
babak akbari Sahar Vahedi Maryam Jamshidi Farhood Najafi: In this project, a dental composite has been prepared using Bis-GMA, UDMA, and TEGDMA resins along with quartz and barium aluminosilicate fillers containing fluoride. After the fabrication stage, FTIR tests were performed to study the surface modification of fillers, More: In this project, a dental composite has been prepared using Bis-GMA, UDMA, and TEGDMA resins along with quartz and barium aluminosilicate fillers containing fluoride. After the fabrication stage, FTIR tests were performed to study the surface modification of fillers, UTM to determine the flexural strength and stiffness test. Then, SEM images were obtained from the fracture surfaces of the bending test. The results of the UTM test were about 23% higher than the standard level of ISO4049 (93MPa) and the hardness test result was 84.4 HV, which is in the acceptable range for dental composites. FTIR peaks related to quartz and barium silicate glass systems showed the success of the silanization process in these two systems. In general, it seems that the composition prepared in this study can meet the requirements of a dental composite. However, further studies need to be carried out. Manuscript profile -
Open Access Article
30 - Synthesis and application of calix[4]arene phosphonato derivative as an effective dispersant of silica in silica-filled rubber compounds
Nasrin Hamrahjou saeed taghvaei Reza ZadmardIn this research, a special new processing aid agent based on calix[4]arene phosphonato derivative (CPD) was synthesized and its effect on silica dispersion within the rubber matrix was investigated. Initially, a reference compound and another compound containing CPD as MoreIn this research, a special new processing aid agent based on calix[4]arene phosphonato derivative (CPD) was synthesized and its effect on silica dispersion within the rubber matrix was investigated. Initially, a reference compound and another compound containing CPD as a processing aid agent, based on SBR/BR and other ingredients were considered. After cure, mechanical tests including tensile strength and elongation at break and scanning electron microscopy (SEM) method were performed. Based on the results of tensile and rheology tests, no significant changes were observed in these properties. SEM images showed that the presence of CPD as a processing aid agent had a significant effect on improving the dispersion of silica in the rubber matrix compared to the reference compound. Therefore, by improving the dispersion of silica, the physical and mechanical properties of the tire tread compound containing CPD were improved and the performance of the tire increased. Manuscript profile -
Open Access Article
31 - Targeted delivery of Elesclomol to colorectal cancer using a drug delivery system based on magnetic mesoporous silica nanoparticles
Mojtaba Tarin Maryam Babaei Hossein Eshghi Maryam Matin Amir Shokooh SaljooghiIn this research, the targeted delivery of elesclomol to colorectal cancer cells was explored through the development of magnetic mesoporous silica nanoparticles (MMSNs) loaded with elesclomol and surface modification with gold gatekeepers, bifunctional polyethylene gly MoreIn this research, the targeted delivery of elesclomol to colorectal cancer cells was explored through the development of magnetic mesoporous silica nanoparticles (MMSNs) loaded with elesclomol and surface modification with gold gatekeepers, bifunctional polyethylene glycol (PEG) polymer, and epithelial cell adhesion molecule (EpCAM) aptamers to improve drug delivery performance. The physicochemical properties of nanocarriers were characterized and the cellular toxicity of elesclomol, and nano-delivery system with and without EpCAM aptamer modification has been investigated in vitro. High resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM) showed that MMSNs had a uniform spherical morphology with a diameter of 19 nm and a negative surface charge. Elesclomol was successfully encapsulated in the open porous structure of the nanocarrier. The encapsulation efficiency (EE) and drug loading capacity (LC) were about 88% and 39%, respectively. Moreover, the prepared Au-ELC-MMSN-NH2 displayed pH responsive and sustained drug release within 96 h. Targeted nano-delivery systems were prepared with a final diameter of 89 nm and a negative surface charge. The MTT assay revealed that the targeted nano-delivery system induced highly effective cytotoxicity on colorectal cancer cells-expressing EpCAM aptamer (HT-29) compared to the CHO cells. This engineered nano-platform is a promising elesclomol replacement therapy for colorectal cancer. However, further experiments are required before it can be practiced in the clinic. Manuscript profile -
Open Access Article
32 - سنتز سیلیکای نانو متخلخل (SBA-15) عاملدار شده با لیگاند آلی شامل گروههای کربوکسیلیک اسید و به کارگیری آن در حذف آلاینده صنایع آبزیپروری
علی بدیعی بهمن حسن زاده رضا رحمانیان -
Open Access Article
33 - ساخت سیلیکاژل کروماتوگرافی لایه نازک در مقیاس آزمایشگاهی
ابراهیم بختیاری دوست احسان اردستانی جوادی علی اصغر احتشامی قیس رخشان اصغر کرمی -
Open Access Article
34 - کلسیم فسفاتهای دوفازی هیدروکسی آپاتیت/ اکتاکلسیم فسفات برای کاربردهای مهندسی بافت سخت
زهرا محمدی عبدالرضا شیخ مهدی مسگر فریبا رسولی محمد نوری -
Open Access Article
35 - بررسی مقدار جذب +Co2و رادیونوکلوئیدهای 58Co و 60Co به وسیله نانوذرات تیتانوسیلیکات حاوی Nb و Ge
سعید علمدار میلانی نوشین طلایی حمید رضا آقابزرگ -
Open Access Article
36 - استخراج نقره از محلول عکاسی با استفاده از جاذب نانومتخلخل SBA-15 عاملدار شده با تریآمینفلوئورن
لیلا حاجی آقا بابایی علیرضا بدیعی مریم خردمند محمدرضا گنجعلی قدسی محمدی زیارانی -
Open Access Article
37 - سیلیکا فسفوسولفونیک اسید: کاتالیست حالت جامد برای سنتز موثر سه جزیی و تک ظرف 2، 4، 6-تری آریل پیریدینها در شرایط بدون حلال
آرش مرادزادگان علیرضا کیاست هادی عصاره -
Open Access Article
38 - Removal of cadmium ion from zinc oxide in rubber industries by chemically bonded chlorosulfonylcalix[4]arene to silica
ashkan bagheri chenari manochehr mamaghani mandana saber tehrani mohammad nikpasandZinc oxide is an important industrial material using in different industries, in particular rubber industries. This compound like the other industrial materials has amounts of impurities and then removal of those because of their undesirable influences on rubber compoun MoreZinc oxide is an important industrial material using in different industries, in particular rubber industries. This compound like the other industrial materials has amounts of impurities and then removal of those because of their undesirable influences on rubber compounds curing and environment, is taken into consideration. In this study, chemically bonded chlorosulfonylcalix[4]arene to silica gel was synthesized by using the methods in literature reports, afterwards it was used as an absorbent to remove cadmium ions from zinc oxide solution. The adsorption of metal ions from aqueous solution was investigated by atomic absorption spectroscopy. Sorption percentage and adsorption capacity were calculated by using the ions concentration in each level. The results showed that cadmium ions were removed from zinc oxide solution effectively by tetrachlorosulfonylcalix[4]arene-silica whilst silica gel without any reactive agent, could not remove the ions from the solution. Manuscript profile -
Open Access Article
39 - سیلیکاژل- اکسالیک اسید: کاتالیست کارآمد برای سنتز 4،3،2،1- تتراهیدروکینولین به وسیله ی واکنش ایمینو دیلز- آلدر
محمد رضا شوشی زاده ماه نوش محرابیان -
Open Access Article
40 - سامانه لخته ساز دوگانه برای حذف رنگ از آب: هیبرید پلی(آکریل آمید-کو-دی آلیل دی متیل آمونیم کلرید)/سیلیکا و پلی آکریل آمید آنیونی
حسین مهدوی عفت درین فریبا رزمی -
Open Access Article
41 - Synthesis of mesoporous silica microspheres and its application for reversed-phase high-performance liquid chromatography
کورش تبار حیدر زینب دین محمدپور مریم افشارپورSilica is the most used support for high-performance liquid chromatography columns. Mesoporous silica has attracted much attention due to its properties. Columns with spherical shaped mesoporous silica particles are superior for chromatographic applications because they MoreSilica is the most used support for high-performance liquid chromatography columns. Mesoporous silica has attracted much attention due to its properties. Columns with spherical shaped mesoporous silica particles are superior for chromatographic applications because they provide higher efficiency and lower back-pressure compared to irregular particles. In this work, mesoporous silica microspheres were prepared via a two-step synthesis process by using tetraethyl orthosilicate, amphiphilic triblock copolymer, cetyltrimethylammonium bromide, and ethanol. To obtain mesoporous silica spheres with mean particle size about 5.5 μm )obtained by scanning electron microscopy), specific surface area about 670 m2/g and pore diameter about 7 nm )obtained by N2 adsorption-desorption), parameters of synthesis were optimized. After surface functionalization with C18 )about 21% C, obtained by elemental analysis), they were slurry packed into a column )25 cm × 4.0 mm i.d.) and used for separation of alkylbenzenes containing 1-5 carbons, polycyclic aromatic hydrocarbons, and pyridine derivatives mixtures. Phenol and pyridine mixture were used for investigation of active silanols. The synthesized C18-modified mesoporous silica microspheres showed good, repeatable and stable results for separation of above compounds. Among them, the highest efficiency of the column is for benzene with 1484 theoretical plates. Resolutions of copmounds are between 1 and 4. According to tailing factors, peaks are almost symmetric, except pyridine derivatives that show a little tailing. Manuscript profile -
Open Access Article
42 - طراحی و ساخت سامانه پیش تغلیظ مناسب به منظور اندازهگیری مقادیر اندک ناخالصیها در هیدروژن با خلوص بالا
علی صابری مقدم وحید خبری -
Open Access Article
43 - سنتز و آماده سازی نانو پوششهای آب گریز سیلیکا به روش سل-ژل- غوطه وری
هانیه محمدزاده لیلا ترکیان مریم دقیقی اصلی -
Open Access Article
44 - تأثیر ذرههای نانوسیلیکا بر ویژگیهای سطحی نانوکامپوزیت پلی بوتیلن ترفتالات/سیلیکا
مازیار پروین زاده گشتی آرش الماسیان -
Open Access Article
45 - بورسولفوریک اسید به عنوان کاتالیزوراسیدی جامد در تهیه استرها
کبری سرخه علیرضا کیاست -
Open Access Article
46 - سنتز نانو کامپوزیت زیست فعال مزو حفره سیلیکا/هیدروکسی آپاتیت به روش سل- ژل
زهرا طاهریان مردعلی یوسف پور محمد علی فقیهی ثانی علی نعمتی مهناز عنایتی -
Open Access Article
47 - Evaluation of hot coating method to make the composite ceramic membran
شهرام قنبری پاکدهی الهام رحیمی کوروش شفیعیThe use of membrane has very specific role in the separation processes such as gas separation and dehydration of the azeotropic feed. The most important step in any membrane process is selection of the membrane material and its fabrication. The ceramic membrane has been MoreThe use of membrane has very specific role in the separation processes such as gas separation and dehydration of the azeotropic feed. The most important step in any membrane process is selection of the membrane material and its fabrication. The ceramic membrane has been more attracted due to sufficient strength, thermal, and chemical stabilities. The ceramic membrane is a composite membrane containing three layers. The first layer is a macroporous support, the second layer is a mesoporous support, and the third layer is silica with micropores which plays a key role in the separation process. Therefore, the quality and uniformity of the third layer is so important that increases directly the efficiency of the separation process. In this article, a method has been presented in which the defects of silica are reduced. In this method, known as hot-coating, the support was heated before all usual coating. Reduction in gaps or defects and increase in continuity or uniformity of the silica layer was observed from SEM analysis. On the other hand, comparing the results of gas permeability test through hot coating and usual coting revealed that the exit gas flow rate was reduced significantly in hot coating. According to reduction in thickness of the silica layer, the decrease in exit gas flux is attributed to increase in continuity and reduce in defects of the layer. So, the continuous or uniform silica layer is obtainable via hot coating through fewer coating steps than usual coating Manuscript profile -
Open Access Article
48 - بررسی استفاده از پرکننده سیلیکا همراه با دوده بر روی مقاومت در برابر خستگی آمیزه رویه تایرهای باری
میرحمیدرضا قریشی سعید تقوایی رامین ظفرمهرابیان -
Open Access Article
49 - مطالعهی رفتار جذبی کلروسولفونیل کالیکس [4] آرن تثبیتشده بر سیلیکاژل نسبت به برخی از مواد شیمیایی مورداستفاده در صنعت لاستیکسازی
زهرا ثروتی سعید تقوایی گنجعلی ماندانا صابر تهرانی رضا زادمرد -
Open Access Article
50 - بررسی تجربی نفوذ شبه استاتیکی چند لایه های فلز – کامپوزیت تقویت شده با نانو سیلیکا
فرزاد گردانه مهدی یارمحمد توسکیچند لایه های فلز - کامپوزیت ) FML ) به دلیل دارابودن مزایای مهمی از جمله استحکام بالا، وزن کم، مقاومت در برابرخوردگی و رطوبت، خواص خوب خستگی و غیره مورد توجه صنایع مختلف از جمله صنایع هوا و فضا قرار گرفتهاند. در تحقیقحاضر هدف آن است تا با اصلاح ساختار FML از طریق افزودن Moreچند لایه های فلز - کامپوزیت ) FML ) به دلیل دارابودن مزایای مهمی از جمله استحکام بالا، وزن کم، مقاومت در برابرخوردگی و رطوبت، خواص خوب خستگی و غیره مورد توجه صنایع مختلف از جمله صنایع هوا و فضا قرار گرفتهاند. در تحقیقحاضر هدف آن است تا با اصلاح ساختار FML از طریق افزودن نانو در زمینه به بهبود خواص مکانیکی آنها کمک شود. بدینمنظور درصدهای وزنی های مختلف نانوسیلیکا ( 0 ، 3 / 0 ، 6 / 0 و 9 / 0 درصد نسبت به زمینه( از طریق روشهای همزن مغناطیسیو آلتراسونیک در ساختار FML متشکل از آلومینیم 2024 و الیاف هیبریدی و شیشه افزوده شد. رفتار مکانیکی نمونههای ساختهشده تحت آزمون نفوذ شبه استاتیکی با سمبه سرکروی، مورد بررسی قرار گرفت. نتایج نشان داد که نمونههای FML دارای نانودارای مقاومت به شکست بهتری در مقایسه با نمونه شاهد )بدون افزودن فاز نانو( داشته و بیشترین میزان بهبود استحکام درارتباط با نمونه 6 / 0 درصد وزنی نانو سیلیکا با الیاف شیشه و 3 / 0 درصد وزنی نانو سیلیکا با الیاف هیبریدی مشاهده شده است. Manuscript profile -
Open Access Article
51 - Comparison of the sensitivity of colored silica nanoparticle-based immunosensor with culture and PCR methods in detection of Brucella abortus
Arash Shams Bahareh Rahimian Zarif Mojtaba Salouti Reza Shapouri Sako MirzaiieBackground & Objectives: Brucellosis has always been a threat to the health and economy of the community. The limitations of human and animal disease detection methods justify the need for new diagnostic methods. This study was aimed to compare the sensitivity of co MoreBackground & Objectives: Brucellosis has always been a threat to the health and economy of the community. The limitations of human and animal disease detection methods justify the need for new diagnostic methods. This study was aimed to compare the sensitivity of colorimetric strategy based- immunosensors in the diagnosis of Brucella abortus with those of culturing and PCR methods. Materials & Methods: The colored silica nanoparticles and paramagnetic nanoparticles after synthesis were conjugated with polyclonal antibody to form EDC/NHS complexes to form probe sequences, respectively. These probes were collected after being added to serial dilutions of B. abortus and completing the reaction. Then, with releasing organic dye from the silica structure, absorbance intensity was measured at 670 nm. On the other hand, at the time of each dilution, the corresponding chromosomal DNA was extracted by a DNA extraction kit and used for PCR analysis. The results of all three tests were ultimately compared. Results: Based on the results, the detection range of the immunosensor and culture was the same and equal to 1.5×103 - 1.5×108 CFU mL-1. But, the limit of detection for immunosensor and culture was measured as 450 CFU mL-1 and 400 CFU mL-1, respectively. The results of the PCR test exhibited a wide dynamic range of 1.5×104 to1.5×108 CFU mL-1, with LOD of 5000 CFU mL-1.Conclusion: Comparing the results of this study showed that the proposed immunosensor is capable of replacing conventional B. abortus detection methods and can be considered as an on-site diagnostic tool, with high sensitivity. Manuscript profile -
Open Access Article
52 - The survey of zeolite application and manganese on yield, oil content and seed glucosinolate rapeseed cultivars in different irrigation regimes
Hossein Bagheri Farhad Farahvash مرتضی سام دلیری مهرداد یارنیا امیر حسین شیرانی رادIn order to study the effect of zeolite super absorbent and manganese, on morpho-physiological traits of rapeseed cultivars in different irrigation treatment, an experiment was performed during two years of 2012-13 and 2013-14, as factorial split plot design on the base MoreIn order to study the effect of zeolite super absorbent and manganese, on morpho-physiological traits of rapeseed cultivars in different irrigation treatment, an experiment was performed during two years of 2012-13 and 2013-14, as factorial split plot design on the base of completely randomized block design with three replicates in research farm of Shahryar. Irrigation factor was included three levels, irrigation on the base of 40, 60 and 80 % discharge of irrigation, zeolite factor was included two levels of zero and 15 (ton/ha), manganese factor (manganese sulfate) was included two levels of 0 and 3(g/1000), as factorial were set in the main plots and cultivar factor in four levels including SLM046, Talayeh, Modena and Opera were set in subsidiary plots. Results indicated that applying zeolite in the soil and foliar manganese and increasing the irrigation of the soil, lead to increase the grain yield (6324 kg.ha-1) and seed oil contect (46.5 %). Maximum amount of seed yield in normal irrigation was achieved by application of zeolite in the soil and foliar manganese. Applying manganese and zeolite decreases the amount of seed glucosinolate in different irrigation treatments. Maximum amount of the seed glucosinolate was achieved in normal irrigation condition (16.5 mg/g) by Opera cultivar. With the respect to the low yield in arid and semiarid areas , it is recommended that due to increasing the yield, mineral zeolite in the soil and foliar manganese in different cultivars be used in order to increasing efficiency of the irrigation and yield. Manuscript profile -
Open Access Article
53 - بهبود ریزساختار و خواص مغناطیسی فریتهای لیتیم تولید شده به روش حالت جامد بوسیله افزودنی نانوسیلیکا
محمود محمودی مجید کاوانلویی -
Open Access Article
54 - The Effect of Separate and Simultaneous Use of Phosphate, Silicate and Borate Binders on the Physical and Mechanical Properties of Magnesia - Carbon Monolithic Refractories
سارا علی زاده احمد منشی ابراهیم کرمیان -
Open Access Article
55 - Fabrication of micro-structure of the Fe3O4 / SiO2 / TiO2 core / shell / shell and investigation of its structural properties
fardin ghasemi piranlu fatemeh bavarsiha saeideh dadashianIn this study, Fe3O4 / SiO2 / TiO2 composite was prepared with core-shell-shell structure using a wet chemical method. At first the composite Fe3O4 / SiO2 was synthesized via Tetraethyl orthosilicate (TEOS) precursor. Then a shell of TiO2 was coated directly on it. Fe3O MoreIn this study, Fe3O4 / SiO2 / TiO2 composite was prepared with core-shell-shell structure using a wet chemical method. At first the composite Fe3O4 / SiO2 was synthesized via Tetraethyl orthosilicate (TEOS) precursor. Then a shell of TiO2 was coated directly on it. Fe3O4 / SiO2 / TiO2 microstructures produced were characterized by environmental scanning electron microscopy analysis (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy devices (FTIR). The results showed that SiO2 and TiO2 layers has been coating successfully. The results indicated that the mean size of Fe3O4 particles was about 300-400 nm and thickness of the TiO2 and SiO2 shells was about 4 and 30 nm, respectively. magnetic properties of the synthesized composite were studied by Vibrating Sample Magnetometer (VSM). Pure Fe3O4 and Fe3O4@SiO2@TiO2 composites magnetization saturation (Ms) obtained 80 and 37 emu/g, respectively. also the remanent magnetization (Mr) value of Fe3O4 and Fe3O4 / SiO2 / TiO2 microstructures was 8 and 6.43 emu/g, respectively. Manuscript profile -
Open Access Article
56 - 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
57 - Synthesis and characterization of hollow mesoporous Silica nanocomposites via polystyrene template
Abolhassan Najafi Mahdi Khoeini Mostafa AmaniIn this study, the synthesis of hollow mesoporous silicate particles was studied using TEOS precursor in the presence of a polystyrene template and CTAB surfactant micelles. The process was carried out in based on alcoholic system with pH control and adding CTAB surface MoreIn this study, the synthesis of hollow mesoporous silicate particles was studied using TEOS precursor in the presence of a polystyrene template and CTAB surfactant micelles. The process was carried out in based on alcoholic system with pH control and adding CTAB surface activator at a suitable concentration. The results of the FTIR analysis showed that the pre-forming particles of TEOS formed surface boundaries during the synthesis process with CTAB surfactant agents. Also the presence of Si-O-Si bonds (range from 600 to 1320 cm-1) indicates the formation of silicate chains on polystyrene molds. Thermal analysis studies showed that using appropriate heat treatment and precise control, all organic compounds can be removed from the system and synthesized hollow mesoporous silica particle with the least structural defects at 380°C. The BET analysis showed that the specific surface of these synthesized mesoporous silicate particles is 1180 m2.g-1 X-ray diffraction results showed that the product obtained was amorphous silica and impurity phases are not formed in this system. The DLS analysis showed that the synthesized particles had dimensions ranging in size from 1 to 10 nm and the distribution of particle size has occurred in a narrow range. SEM images confirm the sphericality of nanoparticles with a mean size of 25-30 nm. Finally, the transmitted electron microscope images showed that the synthesized silicate particles were hollow, so that the diameter of the hollow cavity and its entire total diameter are about 30 and 80 nm, respectively. Manuscript profile -
Open Access Article
58 - Investigation of the Effect of Strontium Ion Content on Thermal, Bioactivity, Antibacterial Properties and Behavior of MC3T3-E1 Osteoblast Cells in Silicate-Based Bioactive Glass
Noushin Nankali Amirhossein Moghanian Morteza Saghafi YazdiBioactive glass (BG), is able to bind to body tissues, in this regard, it can be considered suitable material for applications such as bone tissue engineering. In this study, we first synthesized and studied the structural changes, biocompatibility, in vitro bioactivity MoreBioactive glass (BG), is able to bind to body tissues, in this regard, it can be considered suitable material for applications such as bone tissue engineering. In this study, we first synthesized and studied the structural changes, biocompatibility, in vitro bioactivity, biological behavior and antibacterial properties of silicate-based BG containing with strontium. To evaluate the bioactivity, the BG powder was placed in a simulated body fluid (SBF) solution for 1, 3, 7 and 14 days and then before and after the mentioned time periods, the changes and the process of forming a hydroxyapatite (HA) layer on their surface was studied by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), release rates of various ions elements, pH changes and scanning electron microscopy (SEM). The results of X-ray diffraction tests and infrared spectroscopy studies confirmed the formation of crystalline HA layer on the BG surface. Moreover, the results of live/dead assay, nucleus microstructure and actin microfilaments of MC3T3-E1 osteoblast cells showed that 5% of strontium in silicate-based bioactive glass led to the growth, proliferation and activity of MC3T3-E1 osteoblast cells. The results of cytotoxicity test and evaluation of alkaline phosphate activity showed that substitution of strontium instead of calcium in silicate-based bioactive glass composition not only did not cause cytotoxicity but also caused significant proliferation and activity of MC3T3-E1 osteoblast cells. Meanwhile, improvements in the antibacterial properties of strontium-containing bioactive glass against MRSA bacteria were observed in comparison with strontium-free bioactive glass. Manuscript profile -
Open Access Article
59 - Magnetite -silica-quantum dot carbon nano composite to use in melatonin drug delivery
aida faeghinia hossein nouranian Hossein eslamiIn targeted drug delivery, the drug is released at specific points and conditions, and in this study, magnetite nuclei were used to target the drug system. First, magnetite nanoparticles were synthesized by co-precipitation of two- and three coordinated iron chloride sa MoreIn targeted drug delivery, the drug is released at specific points and conditions, and in this study, magnetite nuclei were used to target the drug system. First, magnetite nanoparticles were synthesized by co-precipitation of two- and three coordinated iron chloride salts (FeCl2 and FeCl3).Carbon dioxide quantum dots, which had been hydrolyzed by citric acid and whose surface was ineffective by diethylamine, were then placed in silica cavities by physical absorption. The effective drug melatonin was also loaded on the system by physical absorption, and the method of releasing this drug by dialysis bag was carefully examined in the simulated environment of blood and cancer tissue, and the quantum yield of the system was determined. The accuracy of the operations performed by electron microscopy, nitrogen uptake and absorption, factor characterization, X-ray diffraction, magnetometry and infrared spectroscopy were investigated. The results showed that the loading of melatonin and carbon quantum dots was well performed on silica nanoparticles with magnetite nuclei, and the system also releases the drug well at room temperature. Manuscript profile -
Open Access Article
60 - Optical behavior of multilyer-composite Silica-Titania coatings applied by sol-gel method
Najme lari Shahrokh Ahangarani Ali Shanaghi -
Open Access Article
61 - The effect of sodium silicate on yield and yield components of pea (Cicer arietinum L.) under salinity stress
Mahdi Jalali Amin Fathi Massoumeh Namrvari Somayeh . Karami Chameh Sadegh BahaminPeas are the second most important plant families with high quality protein and important role in increasing soil nitrogen. The plant is sensitive to salinity and given that a large part of our land and the passion necessary to make possible the necessary measures to be MorePeas are the second most important plant families with high quality protein and important role in increasing soil nitrogen. The plant is sensitive to salinity and given that a large part of our land and the passion necessary to make possible the necessary measures to be taken to prevent a decrease in performance. In this regard, one of the elements that can improve plant water status, the effects of salinity amend, is silicon. For this purpose, a factorial experiment in a completely randomized design with three replications was conducted. Treatments consisted of soil salinity at levels 2, 4 and 6 dS/m and sodium with levels of 0, 1 and 2 mM. The results showed that salinity had a significant effect on the number of pods per square meter, number of seeds per square meter, grain weight, grain yield and dry matter, so that increasing salinity level would be to reduce the amount of these traits. The yield on the EC 6 dS.m to the 41.4 grams per square meter, respectively. Silicon is also a significant effect on the number of pods per square meter, seed weight and seed yield. The highest grain yield in 2 mM sodium consumption to the amount of 99.7 grams per square meter. Manuscript profile -
Open Access Article
62 - Effect of sillicium priming on seed germination and initial growth of melon seedlings under salinity stress
Zakieh Azari Mohammad Sadeqe Sadeqi Hassan Bayat Hossein ArooieThe main goal of current experiment was evaluation of the effects Si priming on germination characteristics of melon under salt stress. For this purpose, a factorial experiment based on completely randomized design was conducted with three levels of Si 0 as control, 1 a MoreThe main goal of current experiment was evaluation of the effects Si priming on germination characteristics of melon under salt stress. For this purpose, a factorial experiment based on completely randomized design was conducted with three levels of Si 0 as control, 1 and 2 mM and 3 levels of NaCl (0, 75 and 150 mM) with three replications. Measured traits were germination percentage and rate, mean germination time, radical and plumule length, radical to plumule ratio, radical and plumule fresh weight. The salinity of 150 mM decreased germination percentage and rate, radical and plumule length by 9, 35, 69 and 71X comparing to the control, respectively. Seed priming with Si of 1 mM increased germination rate, radical and plumule length by 20, 33 and 35% comparing to the control, respectively. Seeds treated with Si (1 mM) had the highest germination percentage and rate at 75 mM of NaCl. On the whole, seed priming with Si could improve germination characteristics and seedling growth of melon under salinity stress conditions. Manuscript profile -
Open Access Article
63 - Foliar application of potassium silicate solution with elements of macro and micro elements on agronomic traits Tarom
atena najafi mehran mahmoudiIn order to determine the effect of potassium silicate solution with elements of macro and micro elements on agronomic traits of rice, Tarom, a field experiment in paddy fields Galogah city - Village marbles of the crop year 2014 was conducted. The results showed that t MoreIn order to determine the effect of potassium silicate solution with elements of macro and micro elements on agronomic traits of rice, Tarom, a field experiment in paddy fields Galogah city - Village marbles of the crop year 2014 was conducted. The results showed that the highest plant height (013/180 cm) to 2 liters per hectare and no interaction effects of potassium silicate elements. The results showed that the highest number of tillers (500/57) related to interaction effects and without the element potassium silicate was 2 liters per hectare. Results showed that the total number of seeds (87/134 x) the interaction effects of potassium silicate was 2 liters per hectare and micro and macro elements. The highest number of unfilled grain (50/129 pcs) related to interaction effects of potassium silicate 3 liters per hectare, without the element. The highest number of grain (15/7 x) related to the interaction effects of potassium silicate 0 liters per hectare, without the element and the highest grain weight (23/26 mg) of potassium silicate interaction effects 1 liter per hectare and the element Micro respectively Manuscript profile