محمد جواد ضمیری

[ 1 ] - تأثیر تغذیة پیوگلیتازون بر تخمک‌ریزی و برخی بیماری‌های پس از زایش در گاوهای هولشتن

هدف این پژوهش بررسی اثر پیوگلیتازون بر کنش تخمدان و کاهش برخی بیماری‌های پس از زایش در گاوهای هولشتن بود. تعداد هشتاد گاو شیری هولشتن به‌صورت تصادفی در چهار گروه تیماری (20n=) با آرایش فاکتوریل 2×2 قرار گرفتند. تغذیة پیوگلیتازون از 14 روز مانده به زمان مورد انتظار زایش تا 21 روز پس از زایش انجام شد. تغذیة پیوگلیتازون پیش و پس از زایش، عامل اصلی در نظر گرفته شد؛ گاوها در هر دوره با یکی از دو سطح...

[ 2 ] - Increased litter size and suckling intensity inhibit KiSS-1 mRNA expression in rat arcuate nucleus

Objective(s): The effect of litter size and suckling intensity on the expression of KiSS-1 mRNA in the arcuate nucleus (ARC) of rats were evaluated. Materials and Methods: Thirty two pregnant and four non-lactating ovariectomized (as control group) rats were used in this experiment. Lactating rats were allotted to eight equal groups. In three groups, litter size was adjusted to 5, 10, or 15 pup...

[ 3 ] - Effect of thymol and carvacrol on nutrient digestibility in rams fed high or low concentrate diets

Published data on the effects of essential oils (EO) on in vivo nutrient digestibility in sheep are contradictory. In 2 experiments, the effect of thymol and carvacrol on nutrient digestibility was studied in sheep fed with high (70%) or low (52%) concentrate diets, using incomplete Latin Square designs. The essential oils were mixed with the concentrate portion of the diet at the rate of 0.0, ...

[ 4 ] - The effect of long-term feeding of olive-pulp silage on blood attributes of two fat-tailed ram breeds

The effect feeding olive-pulp silage (OPS) for 120 days on several blood attributes was studied using 16 rams allotted to two diets consisting of 70% corn silage or 70% OPS. Olive-pulp silage feeding resulted in lower serum total protein, alanine aminotransferase, calcium and phosphorus levels and higher glucose concentration compared to the corn silage diet. Body weight and other blood attribu...

[ 5 ] - Effect of egg yolk of four avian species on the cryopreserved ram spermatozoa

Egg yolk is the most commonly used cryoprotective agent for sperm cryopreservation of several species.The objective of this experiment was to compare the effectiveness of egg yolk from four avian species(domestic chicken, duck, turkey and pigeon) on sperm quality following cryopreservation of the ram semen.Ejaculates were collected, using an electroejaculator, from six fertile rams. Samples wer...

[ 6 ] - Effects of water desalination on milk production and several blood constituents of Holstein cows in a hot arid climate

Fourteen primiparous Holstein cows (180.0 ± 4.3 days in milk) with a mean (±SD) daily milk yield of 35.0 ± 1.3 kg and a body condition score of 3.2 ± 0.2 were allotted into two groups (n = 7), and were fed a ration consisting of (dry matter basis) 35% corn silage, 25% alfalfa hay and 40% concentrates. Salt was provided free choice. The experiment was performed during the period of heat stress, ...

[ 7 ] - Effects of vitamin C on testicular and seminal characteristics of Markhoz goats

The effect of subcutaneous injections of vitamin C on the seminal characteristics of Markhoz bucks (2–4-year-old) was studied. The bucks, trained to serve an artificial vagina, were randomly allotted into three equal groups (n = 4) and received daily either zero (1 mL normal saline; control group), or 20 (VitC20 group) or 40 (VitC40 group) mg per kg body weight vitamin C from July 06, 2006 to O...

[ 8 ] - Effect of feed restriction on compensatory growth response of young male goats

Forty eight 8-month-old male goats were divided into three groups. In each group, eight goats were feedrestricted for 45, 60 or 75 days, and eight goats served as the control. Restricted groups were fed with a maintenance ration, and the control goats were fed with a ration supporting 50 g of daily weight gain. At the end of restriction period, the restricted goats were offered the same ration ...

[ 9 ] - Effects of ephedrine and its combination with caffeine on body composition and blood attributes of fat-tailed Mehraban lambs

The effect of ephedrine at 0 (E0C0, n = 10), 8 (E8C0, n = 10) and 10 (E10C0, n = 10) mg per kg metabolic body weight or mixture of ephedrine/caffeine, at doses of 8 mg ephedrine/80 mg caffeine (E8C80, n = 10), or 10 mg ephedrine/100 mg caffeine (E10C100, n = 7), per kg metabolic body weight on body composition of feedlot Mehraban ram lambs (8-month-old) was studied. The lambs were fed for 95 da...

[ 10 ] - Relationships between chemical composition of meat from carcass cuts and the whole carcass in Iranian fattailed sheep as affected by breed and feeding level

To investigate the relationship between chemical composition of meat from the carcass cuts and thewhole carcass, 48 nine-month-old randomly selected ram lambs of Ghezel and Mehraban (24 rams per breed)were used in a trial arranged as a 2 × 2 factorial experiment with two breeds and two feeding levels (high andlow), in a completely randomized design. After 80 days, all animals were slaughtered a...

[ 11 ] - Efficacy of CIDR, fluogestone acetate sponges and cloprostenol for estrous synchronization of Nadooshani goats during the breeding season

The objective of this study was to evaluate three methods of estrous synchronization, viz. controlled internal drug releasing device (CIDR), intravaginal sponges impregnated with fluogestone acetate (FGA), and cloprostenol (Estrumate; an analogue of prostaglandin F2α) in Nadooshani goats of Yazd province, Iran.The estrous synchronized does (n = 30 to 33 per treatment), after heat detection, wer...

[ 12 ] - Effects of supplementary feeding on growth and carcass characteristics of fat-tailed lambs grazing cereal stubble

Despite a shortage of animal feed in Iran, cereal stubble is often underutilized due to agro-economic reasons. On the other hand, lambs fed with a conventional fattening ration deposit a considerable amount of fat; therefore, this experiment was conducted aimed at better utilization of cereal stubble and reducing the fat content of lamb carcasses. Fat-tailed Mehraban and Ghezel ram lambs were p...

[ 13 ] - Effect of transient prepubertal hypothyroidism on serum testosterone level and seminal characteristics of chickens

Effect of propylthiouracil (PTU)-induced hypothyroidism during the prepubertal period, at a dose of oneg per kg of the diet, on serum testosterone level and seminal characteristics of Fars indigenous chickens wasstudied. PTU was fed between 7th to 13th weeks of age and semen was collected at weekly intervals, starting at 21st week of age and continued for seven weeks. The effect of PTU treatmen...

[ 14 ] - تأثیر پوست انار عصاره‌گیری نشده و عصاره‌گیری شده بر فراسنجه‌های تولید گاز با استفاده از شیرابه شکمبه گوسفند نژاد قزل

هدف از این پژوهش بررسی ارزش تغذیه‌ای پوست انار عصاره‌گیری شده با و بدون استفاده از پلی‌اتیلن‌گلیکول بر کنیتیک تولید گاز به روش آزمایشگاهی و برخی فراسنجه­های تخمیر شکمبه­ای همانند نیتروژن آمونیاکی، اسیدهای چرب فرار و جمعیّت پروتوزوآدر گوسفند بود. مقادیر کل ترکیبات فنولیک (01/۰P

[ 15 ] - همراهی چندریختی در ژن‌های DGAT1 و IGF-I با عملکرد تولیدی و تولیدمثلی در گاوهای هلشتاین

زمینه­ مطالعاتی: هدف پژوهش­های ژنومیک در گاوهای شیری، شناسایی ژن­های کنترل کننده­ی صفات اقتصادی است که در برنامه­های اصلاح­نژادی کاربرد دارند. هدف: هدف این پژوهش بررسی همراهی چندریختی در اگزون 8 ژن DGAT1 و اگزون 4 ژن IGF-I با عملکرد تولیدی و تولید­مثلی در یک نمونه از گاو­های هلشتاین بود. روش کار: در این پژوهش از 133 گاو خونگیری شد و پس از استخراج DNA ژنومیک آنها، ژن­های مورد مطالعه با استفاده ا...

[ 16 ] - تأثیر فرآوری اکسیداتیو با آهک در راکتور فرآوری‏کننده، برگوارش‏پذیری برگ خشک خرما به روش برون‏تنی

[ 17 ] - اثر نانو اکسید مس و الیگوساکارید مانان بر گوارشپذیری مواد مغذی و عملکرد رشد در جوجه های گوشتی

زمینه مطالعه: به دنبال ممنوعیت استفاده از محرک‌های رشد آنتی بیوتیک در بسیاری از کشورهای جهان، علاقه زیادی به پیدا کردن جانشین مناسب برای آنتی بیوتیک‌ها در تولیدات پرندگان به وجود آمد. هدف: هدف از این پژوهش بررسی اثر دو سطح از نانو مس (mg/kg 0 و 100) و دو سطح از الیگوساکارید مانان (g/kg 0 و 1) به عنوان محرک‌های رشد طبیعی بر گوارش  پذیری مواد مغذی و عملکرد رشد در جوجه‌های گوشتی است. روش کار: در ا...

[ 18 ] - تأثیر روغن‌های اسانسی حاصل از اورگانو و تایم و آنزیم بتا–گلوکاناز بر عملکرد و گوارش‌پذیری مواد مغذی در جوجه‌های گوشتی تغذیه شده با جیره بر پایه‌ی جو

زمینـه مـطالعه: روغن‌های اسانسی ترکیبات ضدمیکروبی مناسبی هستند، اما در شرایط تغذیه‌ای یا محیطی نامطلوب اثر بیشتری دارند؛ همچنین، روغن‌های اسانسی تولید داخل کشور قابل رقابت با نمونه‌های خارجی هستند. هدف: هدف از پژوهش حاضر، مقایسه اثر افزودن دو روغن اسانسی ارگواستیم( g/kg5/0، وارداتی) و آنتی‌بیوفین( g/kg1‌، ایرانی) بر عملکرد تولید و گوارش پذیری مواد مغذی در جوجه‌های گوشتی تغذیه شده با جیره‌های بر...

[ 19 ] - بررسی تأثیر فرآوری با آهک بر ارزش تغذیه‌ای برگ خرما با روش‌های تولید گاز و میکروسکوپ الکترونی روبشی

برگ خرما در یک آزمایش فاکتوریل (3 × 3) با دما‏های 40، 80 و 100 درجه ‏سانتی‏گراد و زمان‏های 80، 160 و 240 دقیقه در قالب طرح کاملاً تصادفی در رآکتور فرآوری‌کننده با استفاده از آهک فرآوری شد. فراسنجه‌های تخمیر با استفاده از روش تولید گاز بررسی شد. فرآوری سبب کاهش میزان لیگنین از 0/13 درصد در برگ خام به 6 درصد در تیمار 100 درجه سانتی‏گراد برای 240 دقیقه گردید (01/0P

[ 20 ] - Expression of RFamide-related peptide in the dorsomedial nucleus of hypothalamus during the estrous cycle of rats

Introduction: RFamide-related peptide (RFRP) is believed to act as an inhibitor of gonadotropin releasing hormone (GnRH) secretion. The aim of the present study was to compare the expression pattern of RFRP neurons in the dorsomedial nucleus of hypothalamus (DMH) at different phases of the rat estrous cycle. Methods: The phases of the estrous cycle were determined in 16 adult female Sprague-...

[ 21 ] - Effect of lactation on the expression of gonadotropin-inhibitory hormone in dorsomedial and paraventricular nuclei of the rat hypothalamus

Introduction: Gonadotropin inhibitory hormone (GnIH) is believed to be an inhibitor of gonadotropin releasing hormone (GnRH) secretion. The role of GnIH in lactational inhibition of gonadotropin secretion is not well known therefore, the aim of the present study was to evaluate the effect of lactation on expression of GnIH in these nuclei of lactating and non-lactating rats. Methods: Ten po...

[ 22 ] - Seasonal variation in seminal characteristics, testicular measurements and plasma testosterone concentration in Iranian Khalkhali bucks

The aim of the present study was to determine seasonal variations in semen characteristics, testicular size, and plasma testosterone concentration in Iranian Khalkhali goats. An artificial vagina was used to collect semen from 10 bucks (2–4 years of age), from November 2013 to October 2014. Testicular circumference was higher (P<0.05) from September to October. Ejaculate volume, sperm ...

[ 23 ] - Effect of long-term oral administration of thyroxine on morphology of the gastrointestinal tract in broiler breeder hens

Published data on 4-week-long administration of extra thyroxine (T4) in broiler breeder hens to alleviate the cold-induced ascites in their offspring suggested that long-term maternal hyperthyroidism would affect the gastrointestinal tract morphology. Broiler breeder hens (n=70) were reared in individual cages and allotted to control and hyperthyroid groups (five replicates of seven ...

[ 24 ] - Decreased Expression of Arginine-Phenylalanine-Amide-Related Peptide-3 Gene in Dorsomedial Hypothalamic Nucleus of Constant Light Exposure Model of Polycystic Ovarian Syndrome

Objective An abnormality in pulse amplitude and frequency of gonadotropin releasing hormone (GnRH) secretion is the most characteristics of polycystic ovarian syndrome (PCOS). On the other hand, arginine-phenylalanine-amide (RFamide)-related peptide-3 (RFRP3) inhibits the secretion of GnRH in mammalian hypothalamus. Therefore, the current study evaluated the expression of RFRP3 mRNA in dorsomed...

[ 25 ] - The Effects of Different Fish Oil Levels on Productive and Reproductive Performance and Blood Attributes In Female Chukar Partridges (Alectoris Chukar)

The effects of different levels of fish oil on productive and reproductive performance as well as serum biochemical indices in female Chukar partridges were evaluated. Thirty-six 1.5-year-old laying Chukar partridges and 12 age-matched males (female: male ratio of 3:1) were divided to four experimental groups (three replicates of three birds each) in a completely randomized, to orally receive 0...