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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Food Biosciences and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Yeast,Barbari bread,Lactobacillus brevis,Phytate Reduction,Sourdough
- چکیده:
- چکیده انگلیسی: The possible use of Lactobacillus brevis IBRC-M10790 with degrading phytase activity was investigated in sourdough and Barbari bread –using 20 and 30% of sourdough in the formulation- in order to enhance the nutritional bioavailability, and the efficiency of the bacteria in decreasing phytate via using in sourdough was compared to yeast. Results showed that L. brevis IBRC-M10790 has better efficiency in phytate reduction than yeast alone or the combination of yeast and bacteria, and can be effectively used for improving the nutritional properties of Barbari bread. Use of 30% sourdough in bread formulation gave the highest percentage of phytate reduction in breads. It seems that not only the percentage of sourdough (the amount of used yeast), but also fermentation time is important in reducing the level of phytate in Barbari bread. Statistical analysis revealed that pH is not the major factor for phytate reduction in Barbari breads with different percentages of sourdough.
- انتشار مقاله: 21-08-1397
- نویسندگان: H. Hadaegh,S. M. Seyyedain Ardabili,M. Tajabadi Ebrahimi,M. Chamani,R. Azizi Nezhad
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Data mining,modeling,Bioinformatics,Prolactin
- چکیده:
پرولاکتین عمدتا توسط غده هیپوفیز پیشین ترشح شده و قادر به تحریک غدد شیری جهت رشد و تولید شیر در پستانداران و تولید شیر چینه دان در کبوتر میباشد. اگر چه پرولاکتینها از یک ژن اولیه منشعب شدهاند، ولی اختصاصات گونهای آنها متفاوت بوده و ممکن است کارایی آنها نیز متفاوت باشد. برای بررسی نقش خصوصیات مختلف پروتئینی هورمون پرولاکتین در گونههای مختلف، الگوریتمهای مختلف بیوانفورماتیکی بر روی توالی کلیه پرولاکتینهای شناسایی شده اجرا گردید. نتایج نشان داد که استفاده از این روش میتواند برای تعیین خصوصیات خاص پرولاکتین در هر گونه مورد استفاده قرار گیرد. برای اولین بار نشان داده شد که خصوصیات خاص گونهای در هورمون پرولاکتین قابل ردیابی بوده و تعداد و فراوانی دی پپتیدها مهمترین فاکتور در این زمینه بودهاند. همچنین نشان داده شد که استفاده از مدل انتخاب و یا وزن دهی خصوصیات میتواند مهمترین عوامل را شناسایی کرده و فشار بر سیستمهای پردازشی را کاهش دهد. این یافتهها افق جدیدی در بررسی خصوصیات هورمونهای پرولاکتین در گونههای مختلف را نمایان ساخته و راه تولید هورمونهای پرولاکتین موثرتر در آزمایشگاه با استفاده از ابزارهای بیوتکنولوژی را هموار میکند.
- چکیده انگلیسی:
Prolactin is mainly secreted by the anterior pituitary and is able to stimulate mammary gland development and lactation in mammalians. Although prolactins share a common ancestral gene encoding, they show species specific characteristics and their efficiency may be different in various mammals. The importance of protein structures of all sequences of this hormone have been studied by various bioinformatics algorithms. The results showed bioinformatics tools and modeling methods can be used to identify the species specificity of prolactin hormones in animals with an acceptable precision rate. Based on the author’s knowledge, this is the first report on the structural variation of prolactin hormones by specific structural protein features. Gain ratio model acquired the best accuracy and performance among the algorithms applied here and can be used on similar proteins. The counts and the frequencies of dipeptides were the most important protein attributes in this regard. It has also been reported here that feature selection or attribute weighting can be used to select the most important protein attributes and to reduce the burden of processing equipment. The new findings presented here open up new windows in understanding the characteristics of prolactin hormones and also pave the way to engineer more efficient hormones by using various mutagenesis tools such as site directed mutagenesis.
- انتشار مقاله: 23-03-1389
- نویسندگان: M. Ebrahimi,M. Ebrahimi,M. Ebrahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Growth,Aflatoxin,Internal organs,additives,Broiler chicks
- چکیده: 320 قطعه جوجه گوشتی نژاد راس از سن 7 تا 28 روزگی جیرههای حاوی صفر و ppb 125 آفلاتوکسین ب 1 (AFB1)دریافت کردند. جیرههای آلوده با AFB1 با 5/0% سدیم بنتونیت، 2/0% مخمر، 5/0% هیدرات سدیم کلسیم آلومینوسیلیکات، 5/0% آمونیاک، 1/0% فورمایسین و 1/0% توکسیبان بر اساس کیلوگرم خوراک جهت بررسی تاثیر این مواد بر کاهش سمیت AFB1 مخلوط شدند. همچنین در این آزمایش جیرهی عاری از AFB1، شاهد (مثبت) و جیرهی آلوده به AFB1، شاهد (منفی) را تشکیل دادند. جوجهها به 32 گروه 10 قطعهای با میانگین وزنی مشابه (64/0 ± 90 گرم) تقسیم و هر تیمار آزمایشی در چهار تکرار و به مدت 21 روز با جیرههای فوق تغذیه شدند. وزن بدن، افزایش وزن روزانه، ضریب تبدیل خوراک، خوراک مصرفی روزانه و هفتگی، وزن نسبی اندامها (جگر، رودهها، قلب و سنگدان) و میزان پروتئین کل سرم اندازهگیری شد. وزن نسبی اندامها در جوجههایی که از جیرهی حاوی AFB1 تنها تغذیه کرده بود افزایش اما باعث کاهش وزن بدن، افزایش وزن روزانه، غلظت پروتئین کل سرم و بدتر شدن ضریب تبدیل غذایی، نسبت به جوجههایی که از سایر جیرهها تغذیه کرده بودند، شد (P<0.01). وزن نسبی اندامها نسبت به جیره حاوی AFB1 تنها در جوجههایی که جیرهی آلوده بهAFB1 به همراه هر کدام از افزودنیها را مصرف کرده بودند، به طور معنیداری (P<0.01) کاهش یافت. از طرفی افزودن هر کدام از افزودنیها به جیرهی آلوده به AFB1 توانست به طور معنیداری باعث افزایش وزن بدن، افزایش میزان پروتئین کل سرم و بهبود ضریب تبدیل غذایی شود. به طور کلی افزودنیهای فوق موجب کاهش آثار نامطلوب AFB1 در جوجههای گوشتی شدند و فورمایسین به عنوان بهترین افزودنی برای کاهش اثر سمیت AFB1 شناخته شد.
- چکیده انگلیسی: Three-hundred and twenty 7-day-old Ross 308-strain broiler chickens were fed diets containing 0 or 125 ppb aflatoxin B 1 (AFB1) from 7 to 28 days of age. Sodium bentonite (0.5%), yeast (Saccharomyces cervisiae) 0.2%, hydrated sodium calcium aluminosilicate (HSCAS) (0.5%), ammonia (0.5%), formycine (0.1%), and toxiban (0.1%) were added to the basal diet, as fed basis to determine the effects of these additives against aflatoxicosis. Diet free from aflatoxin, and diet containing aflatoxin (negative control group) were considered as comparison groups. Broiler chickens were divided into 32 groups of 10 with similar mean ± SD weight of 90 ± 0.64 g. Each experimental diet was replicated 4 times during 21 days. Body weight gain, daily weight gain, feed conversion ratio, daily and weekly feed intake, relative weight of organs (liver, intestines, heart, proventriculus and gizzard) and total serum protein were recorded. Relative weight of organs in chickens fed with diet containing AFB1 alone were significantly greater (P<0.01) than that of those fed with other diets. Their body weight gain, daily weight gain, total serum protein concentration, however, were significantly lesser (P<0.01) compared with those fed with other diets. Experimental diets decreased the relative weight of organs in chickens fed with diets containing aflatoxin along with any of the experimental diets as compared with the negative control group. The feed conversion ratios were higher in chickens fed with diets containing aflatoxin. On the other hand, chickens receiving various additives in their diets showed an increase in body weight gains, serum total protein concentration and an improvement in the feed conversion ratio when compared with the negative control group (P<0.01). Generally, addition of the above compounds made an improvement against negative effects of AFB1 in broiler chickens. Formycine was recognized to be the best additive in this respect.
- انتشار مقاله: 02-08-1384
- نویسندگان: M. Arab Abousadi,E. Rowghani,M. Ebrahimi Honarmand
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: ELISA,Immunoassay,Endocrine disruptor chemicals,VTG
- چکیده:
- چکیده انگلیسی: There are increasing evidences that show many xenobiotic chemicals (called as endocrine disruptor
chemicals EDCs) through interfering with endocrine system, have the capability to induce developmental
and reproductive abnormalities in humans and animals. The yolk protein precursor vitellogenin (VTG) has
proved to be a simple and sensitive biomarker for assessing exposure of fish to EDCs especially the
estrogenic compounds. Work is ongoing to develop screening and testing programmes for endocrine
disrupting effects of new chemicals, and in the focus of this development are the fish test species common
carp (Cyprinous carpio). In this study we have developed quantitative enzyme-linked immunosorbent
assays (ELISA) for VTG in common carp. The working range of the ELISA was 11.25 to 2,000 ng/ml (25-
75% specific binding/maximum antibody binding [B/B0]) with a 50% B/B0 intra- and interassay variation
of 3.9% (n = 10) and 12.5% (n = 30), respectively. This ELISA is capable of detecting VTG as low as 6
ng/ml, and can accurately detect VTG in even 10 μl of plasma. The ELISA was applied to measurement of
VTG production by male carp (Cyprinous carpio, Cyprinidae) fish exposed to ethynylestradiol. The results
showed that the amount of VTG produced in plasma of exposed fish increased in logarithmic order
comparing to the control group and the ELISA described here could be used as an indicator of water
pollution to estrogenic pollutants.- انتشار مقاله: 08-07-1385
- نویسندگان: M. Ebrahimi,M. Ebrahimi,M. Ebrahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Pollution,competition,Cadmium,zinc,Sperm
- چکیده:
- چکیده انگلیسی: Heavy metal pollutions of aquatic ecosystems have already raised many concerns on aquatic
organisms’health and survival especially on their sperm. The effects of a single metal on sperm may be totally
different from cocktail of several metals because of their interactions, so the effects of zinc, cadmium and
calcium on the trout and carp sperms and their competition have been examined by incubation of different
concentrations of cold heavy metals with a radioactive competing metal. The results showed that radioactive
65Zn and 109Cd were not displaced from the trout sperm by calcium even at 3000 ppm concentration but
radioactive cadmium was displaced equally well by cadmium or zinc, with a decrease in pellet activity to 38
and 37% of control values (0 ppm concentration) at 3000 ppm concentration, respectively in trout. Calcium
was replaced by non-radioactive and radioactive zinc and cadmium as well as by calcium. The findings
confirmed that at least part of heavy metals toxicity (especially cadmium) on fish sperm could be due to
displacement of essential zinc and calcium. Both trout and carp sperms showed a similar pattern.- انتشار مقاله: 09-04-1385
- نویسندگان: M. Ebrahimi,M. Ebrahimi,M. Ebrahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Science and Technology A:Science
- نوع مقاله: Journal Article
- کلمات کلیدی: Chromosome,idiogram,Cyprinodontiformes,cytogenetical analysis
- چکیده:
- چکیده انگلیسی: The karyotype of Zagros tooth-carp, Aphanius vladykovi (Coad) has been investigated by
examining metaphase chromosomes spreads obtained from gill epithelial and kidney cells. The diploid
chromosome number of this species was 2n=48. The karyotype consisted of 8 submetacentric and 40
subtelocentric chromosomes (8Sm+40 St). The arm number (NF) was 28. Sex chromosomes were
cytologically indistinguishable in this tooth-carp.- انتشار مقاله: 08-07-1387
- نویسندگان: H. R. ESMAEILI,M. EBRAHIMI,A. TEIMORI,T. HOJAT ANSARI
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: To determine the relation between birth weight and age of presentation of type 1 diabetes and assess its risk factors, a case-control study was done on all diabetic patients under the age of 15, who were registered in Shiraz Diabetic Center or admitted in Namazi Hospital. A case group of 87 diabetic patients were matched with a control group of 100 healthy individuals. Birth weight ≥ 4kg was determined to be a risk factor for diabetes (odds ratio: 2.04). A weak association was found between birth weight ≤ 2.4 kg and diabetes development.Iran J Med Sci 2006; 31(3): 164-166. Keywords ● Birth weight ● diabetes mellitus type 1 ● risk factors
- انتشار مقاله: 09-06-1394
- نویسندگان: Z. Karamizadeh,H. Jalaeian,M.A. Kashef,M. Ebrahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Engineering, Transactions A: Basics
- نوع مقاله: Journal Article
- کلمات کلیدی: Correlation coefficient,aggregate,Variation coefficient,water to cement ratio,Stress-Strain Test,Percentage of Change in Energy Absorption
- چکیده:
- چکیده انگلیسی: Three parameters, size, shape of aggregate, and water to cement ratio, play important role on concrete behavior. To study the effect of these parameters, two types of aggregates were used, rounded (river) and sharped corners (broken). The maximum sizes of aggregates were chosen to be 9.5, 12.5, 19 and 25 mm for water to cement ratio were 0.35, 0.42, 0.54 and 0.76. In this investigation, the total of 32 mixed designs were made. The stress-strain tests were performed on the entire samples, and the results were compared with the Popovics model. To further evaluate the analysis, three criteria, correlation coefficient, variation coefficient, and percentage of change in energy absorption were demonstarted. Analysis showed that there is significant differences between the Popovics model and our experimental results. The Modified Popovics model was introduced for better understanding the concrete behavior in compression. The proposed model covered a wide range of the parameters concerned in this investigation. The Modified Popovics model was comapred with several models such as the Popovics, Hognestad, Thorenfeldt, and Tsai and the results showed that modified approach has a better clarification for behavior of concrete in compression. Moreover, the results indicated that these models were more accurate for prediction of concrete behavior with rounded aggregates in comparison to sharped aggregates.
- انتشار مقاله: 08-07-1399
- نویسندگان: S.A Haj Seiyed Taghia,H.R. Darvishvand,M. Ebrahimi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Management and Business Research
- نوع مقاله: Journal Article
- کلمات کلیدی: job involvement,Intimacy,Organizational Climate,spirit,Hindrance,Consideration
- چکیده:
- چکیده انگلیسی: The present research was conducted with the aim of exposition of the relationship between organizational climate and job involvement among teachers of high schools in Delijan city of Iran in year (2012-2013). The research was applied, descriptive and correlational.Statistical population included184 teachers in the first semester of educational year (2012- 2013), of which 125 teachers were selected, based on Krejcie and Morgan sample size method. Sampling method was simple random. Reliability of the Halpin and Croft's (1963) organizational climate questionnaire was 0.84.and was 0.87 for Kanungo's (1982) standard job involvement questionnaireusing Cronbach's alpha. Data analysis was accomplished in two parts of descriptive and inferential (Spearman correlation coefficient and Shapiro–Wilk test). Results revealed that there was no significant relationship between job involvement and organizational climate dimensions of spirit, hindrance, intimacy and consideration; however, there was a significant relationship between job involvement and, aloofness as well as production emphasis.
- انتشار مقاله: 26-09-1392
- نویسندگان: M. Ebrahimi,K. Mohamadkhani
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Management and Business Research
- نوع مقاله: Journal Article
- کلمات کلیدی: stock price,residual income,Valuation model,Sinusoidal functions,Discounted models
- چکیده:
- چکیده انگلیسی: The basic model for valuation of firm is the Dividend Discount Model (DDM). When investors buy stocks, they expect to receive two types of cash flow: dividend in the period during which the stock is owned, and the expected sales price at the end of the period. In the extreme example, the investor keeps the stock until the company is liquidated; in such a case, the liquidating dividend becomes the sales price. The residual income valuation model is an alternative model to the divided discounted model or valuation based on multiples in determining a value of a company. It decomposes the company value of a company into two imaginative parts: (1) the real assets of the company. It is assumed that these assets are leased to the company at a certain rate of return. (2) The present value of the future “Residual Incomes”. Residual income refers to the income part which is achieved above the expected return on the real assets (the previously mentioned first part). Thus we examined the effects of Discounted Residual Income (DRI) on stock price of companies listed in Tehran Security Exchange (TSE) by method curve fitting with sinusoidal functions. Our sample includes 1920 firm- year of companies listed in TSE during the period 2005-2010.The results show that there is a significant relationship between discounted residual income and firm’s value. Also the result shows that if we use method curve fitting with sinusoidal functions for fitting model, we can regress the best model and the explanatory power of model will increase.
- انتشار مقاله: 30-09-1393
- نویسندگان: G. Talebnia,M. Ebrahimi,A. Darvishi
- مشاهده