Organic acids

دسترسی آزاد مقاله

1 - Evaluation of the effect of polyamines and organic acids treatment on the nutritional value of button mushroom (Agaricus bisporus)
Sara Motamedi Forogh Mortazaeinejad Vahid Abdossi Davood Naderi

To investigate the effect of polyamines and some organic acids’ application on postharvest life of button mushroom (Agaricus bisporus), an experiment was conducted in 2016. The treatments included putrescine (1, 2, and 3 mM), spermine and spermidine (0.75, 1, and چکیده کامل

To investigate the effect of polyamines and some organic acids’ application on postharvest life of button mushroom (Agaricus bisporus), an experiment was conducted in 2016. The treatments included putrescine (1, 2, and 3 mM), spermine and spermidine (0.75, 1, and 1.5 mM), ascorbic acid (10, 20, and 30 mM), citric acid (2, 3, and 4 mM), cinnamic acid (50, 100, and 150 mM) and the control. Treatments were used in two stages, before and after harvest, in two separate experiments based on a completely randomized design with three replications. At the end of the experiment, the nutritional value including, K, Ca, Fe, Vitamin C, TSS, and Protein in button mushroom were measured. The results indicated that in post-harvest stages, the maximum level of protein and Vitamin C were obtained in response to use of spermidine 1.5 mM. The maximum value of protein was observed at 3 mM putrescine and 30 mM Vitamin C at post-harvest stages. The maximum level of TSS was shown in spermidine 1 mM in both pre- and post-harvest. The application of treatments affect on micro and macro elements significantly. It can be said that application of treatments in the post-harvest stage has more influence on the nutritional value and durability of button mushroom. پرونده مقاله

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2 - A Study on the Antibacterial Activity of Lactic Acid Bacteria Isolated from Traditional Iranian Milk Samples
P. Taheri N. Samadi M. R. Khoshayand M. R. Fazeli H. Jamalifar M.R. Ehsani

198 Lactic acid bacteria (LAB) were isolated from Iranian milk samples. Almost all isolatedLAB showed inhibitory activity towards E. coli and S. aureus as Gram negative and Grampositive indicators, respectively. No role was observed for hydrogen peroxide in the activity چکیده کامل

198 Lactic acid bacteria (LAB) were isolated from Iranian milk samples. Almost all isolatedLAB showed inhibitory activity towards E. coli and S. aureus as Gram negative and Grampositive indicators, respectively. No role was observed for hydrogen peroxide in the activity ofall isolated strains while organic acids proved a prominent role in all detected inhibitoryactivities. Within isolated LAB, four strains represented the inhibitory activity against S. aureusbased on the production of bacteriocin-like inhibitory substances (BLIS). Inactivation of theactivity by proteolytic enzymes demonstrated the proteinaceous nature of the antimicrobialcompounds. The selected producers were identified as L. lactis, E. faecium 1, E. hirae and E.faecium 2 based on biochemical tests according to Bergy's manual of systematic bacteriology.L. lactis had the highest Minimum Inhibitory Concentration (320 IU/ml) and showedbacteriostatic mode of activity towards the indicator bacteria. پرونده مقاله

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3 - Effects of Sodium Butyrate and Rosemary Leaf Meal on General Performance, Carcass Traits, Organ Sizes and Nutrient Digestibility of Broiler Chickens
M.C. Ogwuegbu C.E. Oyeagu H.O. Edeh C.E. Dim A.O. Ani F.B. Lewu

The effect of sodium butyrate, rosemary meal and oxytetracycline supplementation on growth performance, carcass characteristics, visceral organs sizes and nutrient digestibility of broilers was investigated. A total of 320 one-day-old male “Arbor acres strain&rdqu چکیده کامل

The effect of sodium butyrate, rosemary meal and oxytetracycline supplementation on growth performance, carcass characteristics, visceral organs sizes and nutrient digestibility of broilers was investigated. A total of 320 one-day-old male “Arbor acres strain” broiler chicks were allotted to 10 dietary treatments with 4 replicates of 8 birds each. The treatments include: T1: basal diet (BD; negative control), T2: BD + 1 g/kg diet of oxytetracycline (positive control), T3: BD + 2 g sodium butyrate (SB)/kg diet, T4: BD + 4 g SB/kg diet, T5: BD + 2.5 g rosemary meal (RM)/kg diet, T6: BD + 5.0 g RM/kg diet, T7: BD + 2 g SB + 2.5 g RM/kg diet, T8: BD + 2 g SB + 5.0 g RM/kg diet, T9: BD + 4 g SB + 2.5 g RM/kg diet and T10: BD + 4 g SB + 5.0 g RM/kg diet. Birds fed T3, T4, and T5 had the highest (p <0.05) body weight with an improved feed conversion ratio. The dressed weight, breast weight and drumstick/thigh weight were better (p <0.05) for birds fed T3, T4 and T5. The weights of gizzard, liver and lungs were higher for birds fed T3, while, the length of small and large intestine were lower for birds fed T3, T4, and T5. The digestibility of the crude fiber, crude protein, crude fat and dry matter were higher (p <0.05) for birds fed T3, T4, and T5. It was concluded that, T3, T4, and T5 can be safely included for an improved performance; cut yields and nutrient digestibility. They also accelerated the development of health promoting (heart, kidney, and liver) and immune related (spleen) organs. پرونده مقاله

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4 - The effect of rootstocks on sugars, acids, carotenoids, chlorophylls, and ethylene of Satsuma mandarin (Citrus unshiu)
Behzad Babazadeh Darjazi Mozhgan Farzamisepehr Behrouz Golein

10.30495/ijpp.2019.670786

This study aimed to evaluate the effect of rootstocks on fruit sugars, organic acids, and carotenoids. The contents of sugars and organic acidsin fruits were determined by HPLC. Total acidity (TA), total soluble solids (TSS), and pH value of the juice were also evaluate چکیده کامل

This study aimed to evaluate the effect of rootstocks on fruit sugars, organic acids, and carotenoids. The contents of sugars and organic acidsin fruits were determined by HPLC. Total acidity (TA), total soluble solids (TSS), and pH value of the juice were also evaluated. Total carotenoids and chlorophylls contents were measured using a spectrophotometer. The content of ethylenein fruits was determined by gas chromatography. HPLC analysis of the juice allowed the detection of 3 sugars and 2 acids. Sucrose was the dominant sugar for all rootstocks. Total sugars ranged from 93.54 (mg/mL) (Flying dragon) to 111.54 (mg/mL) (Swingle citrumelo). Total acids changed from 9.50 (mg/mL) (Trifoliate orange) to 11.45(mg/mL) (Flying dragon). The ascorbic acid content varied from 0.20 (mg/mL) (Flying Dragon) to 0.32 (mg/mL) (Sour orange). The pH value ranged from 3.14 (Flying dragon) to 3.50 (Trifoliate orange), TSS content changed from 10.70 (%) (Flying dragon) to 11.10 (%) (Swingle citrumelo), TSS/TA varied from 11.75 (Flying dragon) to 13.45 (Trifoliate orange). The juice content ranged from 52.18 (%) (Flying Dragon) to 55.63 (%) (Sour orange). The amount of fruit production changed from 15 (Kg /tree) (Flying dragon) to 115 (Kg /tree) (Swingle citrumelo). Total carotenoids varied from 0.09 (Swingle citrumelo) to 0.15 (Sour orange and Flying dragon) (mg/gr DW). Among the four rootstocks evaluated, Swingle citrumelo demonstrated the maximum level of sugars and TSS. The study concluded that the rootstocks can affect sugars, acids, and, carotenoids contents of the fruits. پرونده مقاله

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5 - Effects of Some Amino Acids and Organic Acids on Enzymatic Activity and Longevity of Dianthus caryophyllus cv. Tessino at Pre-Harvest Stage
Vahid Abdossi Elham Danaee

Carnation (Dianthus caryophyllus L.) is one of the most important cut flowers in the world. This experiment was carried out to evaluate the effects of pre-harvest application of some amino acids and organic acids on enzymatic traits and longevity of carnation flowers (D چکیده کامل

Carnation (Dianthus caryophyllus L.) is one of the most important cut flowers in the world. This experiment was carried out to evaluate the effects of pre-harvest application of some amino acids and organic acids on enzymatic traits and longevity of carnation flowers (Dianthus caryophyllus cv. Tessino) based on completely randomized design with 13 treatments and three replications. The treatments included ascorbic acid (AS), citric acid (CA), malic acid (MA), arginine (Arg), phenylalanine (Phe) and glutamine (Gln), each at two levels of 50 and 100 mg/l. The unsprayed pots constituted the control. The foliar application was carried out three times at 10-day intervals and it was so scheduled that the last stage of spraying was in the green pea stage. Sampling and evaluation of plant traits such as fresh and dry weight, petals anthocyanin, total leaf chlorophyll, phenylalanine ammonia-lyase (PAL), peroxidase (POD), catalase (CAT), superoxide dismutase (SOD) activities and flower longevity were measured on plants at the stage that at least two florets have been opened in the cluster. The results showed that 100 mg/l malic acid had the greatest effect on the improvement in fresh and dry weight, petals anthocyanin, and total leaf chlorophyll. Citric acid, ascorbic acid, and phenylalanine, all at the rate of 100 mg/l, had the greatest effect on improving the activity of catalase, superoxide dismutase, peroxidase, and phenylalanine ammonia-lyase enzymes. Also, 100 mg/l glutamine could improve the longevity of flowers on the plants. Therefore, according to the results of this study, it can be concluded that pre-harvest foliar application of amino acids and organic acids improved enzymatic traits and the longevity of flowers on the plants in carnation (Dianthus caryophyllus) cv. Tessino. پرونده مقاله

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6 - Study on Effects of Ascorbic Acid and Citric Acid on Vase Life of Cut Lisianthus (Eustoma grandiflorum) ‘Mariachi Blue’
Farnaz Sheikh Seyed Hossein Neamati Navid Vahdati Ali Dolatkhahi

The postharvest life of cut Eustoma grandiflorum flowers is limited in open flowers. Therefore a factorial experiment based on a completely randomized design with ascorbic acid (AsA) at 4 levels (0, 100, 200, 300mg L-1) and citric acid (CA) at 3 levels (0, 100, 200 mg L چکیده کامل

The postharvest life of cut Eustoma grandiflorum flowers is limited in open flowers. Therefore a factorial experiment based on a completely randomized design with ascorbic acid (AsA) at 4 levels (0, 100, 200, 300mg L-1) and citric acid (CA) at 3 levels (0, 100, 200 mg L-1) with 3 replications and 3 samples for each replications, was conducted for this purpose. Results indicated that a significant increase with applying ascorbic and citric acid nearly in all traits both individually and in combination, with higher concentrations imposing greater effects (p≤0.05 and p≤0.01). The highest vase life (17.6 days) and petal water content (68.9%) was observed for the interaction of ascorbic acid (300 mg L-1) and citric acid(100 mg L-1) and ascorbic acid (300 mg L-1) and citric acid (200 mg L-1), re-spectively, which shows a 94 and 252% increase compared to control (9.1days and 27.3%). Along with this, relative water content and petal water content raised with AsA and CA increase. Water content also showed a similar manner. Fresh weight decreased in all treatments during experiment, but this reduction was much less in AsA (300 mg L-1) alone and in interactions with CA levels. According to the results of this experiment, ascorbic acid and/or citric acid as cheap, safe and biodegradable compounds are suitable alternatives for chemical treatments in order to prolong vase life of cut flowers of Eustoma. Commercialization of these compounds for optimum formulations needs further experiments. پرونده مقاله

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7 - Effect of Salicylic Acid, Citric Acid and Ascorbic Acid on Post-harvest Quality and Vase Life of Gerbera (Gerbera jamesonii) Cut Flowers
Mona Mehdikhah Rasoul Onsinejad Mohammad Nabi Ilkaee Behzad Kaviani

Cut gerbera (Gerbera jamesonii) flowers are sensitive to microbial contamination and have short vase life. The effect of salicylic acid, citric acid and ascorbic acid (50, 100 and 200 mg l-1) was evaluated on vase life of gerbera flowers. Changes in vase life, water abs چکیده کامل

Cut gerbera (Gerbera jamesonii) flowers are sensitive to microbial contamination and have short vase life. The effect of salicylic acid, citric acid and ascorbic acid (50, 100 and 200 mg l-1) was evaluated on vase life of gerbera flowers. Changes in vase life, water absorption, and bacterial population in stem and vase solution, also biochemical characteristics such as protein concentration, lipid peroxidation level and enzymes activity such as superoxide dismutase and peroxidase were measured and compared with the control. Results showed that the maximum vase life (11.31 and 11.21 days) was achieved in 100 mg l-1 of both citric acid and salicylic acid, respectively. The vase life of control cut flowers was 5.80 days. Most solution uptake (0.907 ml g-1 F.W) was obtained in 100 mg l-1 of citric acid, too. The least bacterial colonies in stem end (151.00) and vase solution (66.33) was obtained in 100 mg l-1 citric acid. Differences between the content of bacterial colonies in vase solution containing 200 mg l-1 citric acid and 100 and 200 mg l-1 salicylic acid was not significant with 100 mg l-1 citric acid. The lowest content (46.04 and 46.21 nmol g-1 F.W.) of lipid peroxidation or MDA content was obtained from cut flowers treated with 200 mg l-1 of citric acid and 100 mg l-1 salicylic acid, respectively. Maximum activity of the peroxidase (0.063 mmol g-1 F.W.) and superoxide dismutase (40.80 nmol g-1 F.W.) enzymes was observed in 200 mg l-1 of citric acid. پرونده مقاله

دسترسی آزاد مقاله

8 - بهبود عمر گل‌جایی گل بریده آلسترومریا (Alstroemeria hybrida) با کاربرد ساکارز، عسل و اسید سیتریک
داود هاشم آبادی ریحانه محمدی

به‌منظور بررسی برهمکنش ساکارز، عسل و اسید سیتریک روی عمر گل‌جایی گل بریده آلسترومریا آزمایشی به‌صورت فاکتوریل بر پایه طرح کاملا تصادفی در سه تکرار و 15 تیمار انجام شد. تیمارهای آزمایشی شامل قند در 5 سطح (بدون قند، ساکارز 2 و 4 درصد، عسل 2 و 4 درصد) و اسید سیتریک در 3 سط چکیده کامل

به‌منظور بررسی برهمکنش ساکارز، عسل و اسید سیتریک روی عمر گل‌جایی گل بریده آلسترومریا آزمایشی به‌صورت فاکتوریل بر پایه طرح کاملا تصادفی در سه تکرار و 15 تیمار انجام شد. تیمارهای آزمایشی شامل قند در 5 سطح (بدون قند، ساکارز 2 و 4 درصد، عسل 2 و 4 درصد) و اسید سیتریک در 3 سطح (0 و 200 ،400 میلی گرم در لیتر) بودند. تیمار عسل 2 درصد در 400 میلیگرم در لیتر اسید سیتریک با 7/18 روز بیشترین عمر گل‌جایی را به خود اختصاص داد که نسبت به شاهد (84/9 روز) 83/8 روز ماندگاری این گل بریده را افزایش داد. کمترین باکتری محلول گلجا (Log 10 CFU ml-1 66/3) و کمترین مقدار مالوندی‌آلدئید (30/11 نانومول در هر گرم وزن تر) در گل‌های تیمار شده با عسل 2 درصد در 400 میلی گرم در لیتر اسید سیتریک مشاهده شد. تیمار شاهد با 72/48 نانو لیتر در لیتر در ساعت در هر گرم وزن تر بیشترین مقدار اتیلن را داشت. کمترین مقدار اتیلن نیز به تیمارهای 200 و 400 میلی گرم در لیتر اسید سیتریک در شرایط بدون قند، ساکارز 4 درصد در 400 میلی‌گرم در لیتر اسید سیتریک و عسل 4 درصد در شرایط بدون اسید سیتریک اختصاص داشت. نتایج حاصل بیان‌گر آن بود که استفاده از عسل (2%) و اسید سیتریک (400 میلی‌گرم در لیتر) با کاهش باکتری محلول گلجا، مالون‌دی‌آلدئید و تولید اتیلن، پژمردگی گل‌ها را به تاخیر می‌اندازد. بنابراین تیمار گل‌های بریده با این ترکیبات جهت حفظ ماندگاری گل‌های بریده آلسترومریا توصیه می‌شود. پرونده مقاله

فهرست مقالات Organic acids

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