List of Articles Microbial population

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  1 - Mathematical modeling for the phytoremediation of oil-contaminated soils
  Faraz Montazerolsedgh Reza Ezzatian Soheila Yaghmaei
  In recent years, the use of plants for soil remediation has been of much interest. Much effort has been put into lab work to obtain experimental data, but despite the great importance of theoretical aspect, less attention has been paid to this issue. The present study i More

  In recent years, the use of plants for soil remediation has been of much interest. Much effort has been put into lab work to obtain experimental data, but despite the great importance of theoretical aspect, less attention has been paid to this issue. The present study is an effort to investigate the theoretical and mathematical concepts governing this process. Basic definitions are presented briefly. Also, the governing mechanisms are discussed. After presenting the continuity and mass transfer equations, first the validity of the obtained equations is verified in a real example with experimental data. Then, the equations are solved numerically and the results are studied and discussed. The findings show that variables such as root length (as an index of plant species), humidity, soil texture and the other parameters, which appear in the equations, affect the process. Moreover, by the proper selection of plants, the operation provided a model which can predict the result of phytoremediation. Manuscript profile
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  2 - Intestinal histopathological investigation and microbial population diversity in rats consuming malt beverage and Rye-based beverage containing microencapsulated Lactobacillus casei
  Shadi Rokhsartalab azar parvaneh jafari Amir Tukmehchi Hassan Malekinejad
  Introduction & Objective: The need of human society is drawn towards healthier and more useful foods and the food industry is expected to pay attention to this need. This study was conducted with the aim of adding encapsulated Lactobacillus Casei to rye drink and in More

  Introduction & Objective: The need of human society is drawn towards healthier and more useful foods and the food industry is expected to pay attention to this need. This study was conducted with the aim of adding encapsulated Lactobacillus Casei to rye drink and investigating the diversity of the bacterial population and intestinal histopathology in the rat animal modelMaterials & Methods: Lactobacillus Casei was encapsulated with a concentration of 2% sodium alginate polymer by emulsion method. After adding a standard dose of encapsulated bacteria to rye drink, in vivo experiments were performed on 4 groups of adult male rats as: control, malt drink, rye drink, and rye drink with probiotics. Animals received the recommended beverages for 28 days. Bacterial population diversity was done by molecular method (PCR-DGGE) and histopathological examination using staining (H&E).Results: There was bacterial diversity in the intestinal contents of the studied rats, and the highest population composition related to Lactobacillus Casei was detected in the intestinal contents of rats that received rye drink with probiotics. Also, histopathological studies did not have negative results in any of the groups.Conclusion: The results of this research show that the use of microencapsulation technique can increase the shelf life of Lactobacillus Casei in the intestine.  Manuscript profile
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  3 - Effect of modified atmospheric packaging and flexible films on the microbial population of Liquvan cheese
  Nazanin Zand Donyaِ Mohammad Zaheri leyla nateghi
  In this project, the effect of three types of flexible multilayer films and different concentrations of three types of gaseous mixtures (carbon dioxide, nitrogen, oxygen) as well as conditions under vacuum and also ordinary conditions as control to increase the shelf li More

  In this project, the effect of three types of flexible multilayer films and different concentrations of three types of gaseous mixtures (carbon dioxide, nitrogen, oxygen) as well as conditions under vacuum and also ordinary conditions as control to increase the shelf life of Liquvan cheese at ambient temperature (250C) were evaluated. Non-gas injection packaging as a control sample were compared with four type of modified atmosphere packaging (70% CO2 + 30% N2) , (30% CO2 + 70% N2) , (47.5% N2 + 47.5% + 5% O2) and under vacuum. For packing samples were used different flexible multi-layer films, 3-layer{PET(12)/ AL(12)/LLD (100)},4-layer {PET(12)/AL(7) /PET(12)/LLD (100) } , and 3-layer { PET(12)/ AL(7)/LLD (100)}. Experiments were performed on samples as follows microbial test (aerobics count; mold and yeast count ; coliform count and chemical pH test, at different times 5,10 15,20 (during twenty days). The results were performed in a completely randomized design by SPSS (Ver:22) and Duncan’s new multiple range test, with confidence level of 95% (P <0.05). Using MAP was not enough to control spoilage, but it was delayed the spoilage process. Therefore, the using of packaging with 4-layers as a low water vapor transmition and gas composition (70% CO2 + 30% N2) as a high antimicrobial properties were used to maintain the long-term of Liquvan cheese during twenty days and have a good effect on the amount of pH was better. Manuscript profile
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  4 - Effect of Lactobacillus plantarum on microbial population of Iranian fermented pickle
  زهرا Nilchian S.H Razavi ابراهیم Rahimi
     Pickle fermentation is a natural process in which microorganisms could affect the quality of the product. Amongst, Lactobacillus plantarum strains that improve the quality of fermented pickle. In this study, in order to produce safe and desirable fermented More

     Pickle fermentation is a natural process in which microorganisms could affect the quality of the product. Amongst, Lactobacillus plantarum strains that improve the quality of fermented pickle. In this study, in order to produce safe and desirable fermented pickle, local cucumbers were immersed in 5% and 7% (w/v) brine solutions. The samples were inoculated with 0, 4 ´106, 4 ´107 and 6 ´108 cfu/ml of L. plantarum. The samples were kept at ambient temperature for 15 days followed by 30 days storage at 4 °C and 25 °C. The bacterial populations were analyzed during the aforementioned stages of fermentation and storage. According to the results, the maximum quantity (8.57 log10 cfu/ml) of L. plantarum was observed in the 9 day of fermentation and in the samples inoculated with 6 ´108 cfu/ml and kept in 5% brine solution. Moreover, compared to the other samples, the population of yeasts and aerobic mesophilic count were the least in the samples inoculated with 6 ´108 cfu/ml of L. plantarum and stored in 7% brine solution. During the storage period, the population of L. plantarum, yeasts and aerobic mesophilic in the samples stored at 25 °C were higher than the samples stored at 4 °C. Results revealed that in the 30 day of storage, the highest load (5.47 log10 cfu/ml) of L. plantarum was observed in the samples kept in 7% brine solution at 4 °C. It was concluded that providing the condition that favors the appropriate growth of L. plantarum could help to hinder the growth of undesirable organisms in fermented pickle.  Manuscript profile
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  5 - The effects of different levels of arginine on cecum microbial population and serum antioxidant properties of healthy and coccidia-challenged broiler chicks
  ّfatemeh Izadi ghoulam Ali moghaddam Ahmad Nematollahi monireh khordad mehr Mahdi Abbasabadi Hadi Ghanbarzadeh
  10.30495/jvcp.2020.1889968.1254
  Cocidiosis causes annual economic losses in industrial poultry farms and nutritional strategies can alleviate these losses. The present study was conducted to evaluate the effects of different levels of arginine on cecum microbial population and serum antioxidant proper More

  Cocidiosis causes annual economic losses in industrial poultry farms and nutritional strategies can alleviate these losses. The present study was conducted to evaluate the effects of different levels of arginine on cecum microbial population and serum antioxidant properties of healthy and Eimeria-challenged broiler chicks. Experimental treatments included healthy and challenged broiler chicks fed with 85, 100, 125 and 150% of the recommended arginine. To conduct bacterial culture, samples were collected aseptically from cecum during slaughter (on days 21 and 42). The levels of antioxidant and oxidant factors and nitric oxide were also assessed in the serum of broiler chicks. The chicks which had received 125 and 150% of arginine showed lower E. coli population and higher population of lactobacillus, total bacteria, bifidiobacteria and pH in the cecum (p < /em><0.05), but entrococous population was not influenced (p < /em>>0.05). Eimeria challenge decreased the level of glutathione peroxidase, super oxide dismutase, and total antioxidant capacity and increased the levels of malondialdehyde (p < /em><0.05), but inclusion of arginine in the levels of 125 and 150% only increased the level of glutathione peroxidase (p < /em><0.05), and did not have any effect on other parameters (p < /em><0.05). In summary, consumption of arginine in higher levels (125 and 150%) decreased the pathogenic population and increased the beneficial bacteria and the level of glutathione peroxidase in Eimeria-challenged broiler chicks. Manuscript profile
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  6 - تاثیر استفاده از سطوح مختلف دانه شوید بر عملکرد، برخی فراسنجه های خونی و جمعیت میکروبی روده در جوجه های گوشتی سویه Ross 308
  یاسر رحیمیان فرشید خیری محمد علوی مهران ابوذر
  10.18869/JHD.2017.21
  مقدمه و هدف: شوید با نام علمی Anethum graveolens گیاهی یک ساله از خانواده Apiaceae  و نام جنس آن Anethum می باشد از جمله مزایای مصرف شوید میتوان به افزایش سلامت دستگاه گوارش،جلوگیری از بیخوابی،سکسه، اسهال و اسهال خونی، کاهش دردهای قاعدگی، مشکلات تنفسی و سرطان اشاره More

  مقدمه و هدف: شوید با نام علمی Anethum graveolens گیاهی یک ساله از خانواده Apiaceae  و نام جنس آن Anethum می باشد از جمله مزایای مصرف شوید میتوان به افزایش سلامت دستگاه گوارش،جلوگیری از بیخوابی،سکسه، اسهال و اسهال خونی، کاهش دردهای قاعدگی، مشکلات تنفسی و سرطان اشاره نمود. این مطالعه به منظور بررسی تاثیر استفاده از سطوح مختلف دانه شوید بر عملکرد، برخی فراسنجه های خونی و جمعیت میکروبی روده در جوجه های گوشتی سویه رآس 308 انجام گرفت. روش تحقیق: تعداد 300 قطعه جوجه گوشتی یکروزه در قالب یک طرح کاملا تصادفی با 4 تیمار و 6 تکرار با تعداد 15 قطعه جوجه در هر جایگاه استفاده شد. تیمار های آزمایشی شامل گروه شاهد(کنترل) بدون هیچ نوع ماده افزودنی و به تربیت مقادیر 200 ، 400 و 600 گرم از دانه شوید در هر تن خوراک بود. در این تحقیق  افزایش وزن روزانه، میزان مصرف خوراک و ضریب تبدیل غذایی در هردوره محاسبه گردید. در انتهای آزمایش تعداد چهار پرنده نر از هر گروه کشتار شده و بازده لاشه محاسبه شد. همچنین برخی از صفات لاشه و وزن نسبی اندام های داخلی مورد ارزیابی واقع گردید. نتایج: نتایج نشان داد که استفاده از دانه شوید سبب افزایش مصرف خوراک، افزایش وزن روزانه بدن و بهبود ضریب تبدیل غذایی در مقایسه با گروه شاهد گردید. به علاوه اختلاف معنی داری(p<0.05) بین تیمارها از نظر FCR مشاهده شد. پیشنهادهای کاربردی و صنعتی: با توجه به نتایج، افزایش میزان شوید باعث بهبود عملکرد و فراسنجه های خونی در جوجه های گوشتی می شود.      Manuscript profile
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  7 - The Effect of Selenized Glucose with Probiotic on Broiler Growth Performance, Immune Response, Intestine Microflora and Morphology
  A. Shokrinejad Gerdin M. Afsharmanesh M. Salarmoini M. Khajeh Bami
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  8 - Effect of Thymol + Carvacrol by Next Enhance 150® on Intestinal Development of Broiler Chickens Fed CMC Containing Diet
  H. Hashemipour H. Kermanshahi A. Golian A. Raji M.M. Van Krimpen
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  9 - Biochemical and Physical Characterization of Petroleum Hydrocarbon Contaminated Soils in Tehran
  Mehrdad Cheraghi Soheil Sobhanardakani Bahareh Lorestani Hajar Merrikhpour Hassan ParviziMosaed
  10.22034/jchr.2015.544108
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  10 - The Effects of Feeding Iranian Propolis Extracts to Holstein Dairy Cows on Blood Metabolites, Milk Composition and Rumen Microbial Population
  S.  Ehtesham A.R. Vakili M. Danesh Mesgaran V.  Bankova
  The purpose of this study was to investigate the effect of feeding Iranian propolis extract on perform-ance of Holstein dairy cows. In this study 18 dairy postpartum Holstein cows (120 days in milk (DIM) and body weight of 577±37.54 kg) were used. The experiment was car More

  The purpose of this study was to investigate the effect of feeding Iranian propolis extract on perform-ance of Holstein dairy cows. In this study 18 dairy postpartum Holstein cows (120 days in milk (DIM) and body weight of 577±37.54 kg) were used. The experiment was carried out in a period of 29 d (10 d adaptation and 19 d sample collection). The data was analyzed considering a completely randomized design by the GLM procedure of SAS 9.1. In this experiment 3 treatments [A: TMR diet, B: TMR diet + Iranian propolis extract (IPE) 50% (67.50 g/day/animal) and C: TMR diet + IPE 75% (67.50 g/day/animal)] were used. The results of this study showed that adding different concentrations of IPE to dairy cow ration did not have any significant effect (P>0.05) on ruminal pH, but significant de-crease (P0.05) change some the blood parameters while statistically changed (P<0.05) the blood concentrations of aspartate ami-notransferase, albumin, glucose and protein. The phenolic compounds in propolis changed rumen ni-trogen ammonia, rumen short chain fatty acids, rumen microbial population, some blood parameters and fatty acid composition in the milk. These changes improve fermentation process and consequently affect significantly fatty acid composition in milk. Manuscript profile
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  11 - The Effect of Various Dietary Fibre Sources on Performance, Cecal and Ileal Nutrient Digestibility in Broiler Chickens
  Y.  Mohammadi A.A. Saki S.  Mirzaei Goudarzi A.  Ahmadi Z. Bardel S.  Mohammadian
  This experiment was conducted to investigate the effects of different sources of insoluble fiber on perform-ance, gastrointestinal tract characteristics, and nutrient digestibility in the broiler's ileum, and cecum. A total of 380-day-old chickens of ross 308 unsexed we More

  This experiment was conducted to investigate the effects of different sources of insoluble fiber on perform-ance, gastrointestinal tract characteristics, and nutrient digestibility in the broiler's ileum, and cecum. A total of 380-day-old chickens of ross 308 unsexed were arranged into 5 treatments, 4 replicates, and 19 chickens in each, by completely randomized design (CRD). Experimental treatments included 1: control (corn-soybean meal) 2: arbocel (synthetic fiber) 1% in diet, 3: sunflower hulls (3% in diet), 4: soybean hull (3% in diet), 5: processed wheat straw (3%in diet). Observed parameter include: performance (feed intake, feed conversion ratio and body weight gain), gastrointestinal pH, gastrointestinal viscosity and digestibility of dry matter and protein in ileum and cecum and microbial population in ileum and cecum. The results have shown that the inclusion of 3% sunflower hulls in diets leads to the higher average feed intake from 1 to 10 days of age rather than control (P<0.05). In comparison between the ileum and cecum showed that the higher viscosity by Arbocel® in the cecum and the lowest viscosity showed by wheat straw in the ileum (P<0.05). On the other hand, the digestibility of protein and dry matter in the ileum was higher than the cecum (P<0.05). According to the results of this study, it could be noted that all fibers are considered in-soluble fibers and their different behavior in the gastrointestinal tract. The diet Arbocel® has generally led to physicochemical changes (digesta pH and viscosity) and microbial populations. It could be the most im-portant reason for these observations which is related to insoluble fiber particle size and their processing. In addition, reduced dry matter and protein digestibility in the cecum in comparison to the ileum status. Fi-nally, digest pH, viscosity, dry matter and protein digestibility were reduced by insoluble fiber in cecum in comparison to ileum. Manuscript profile