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  • دکتری (1391)

    علوم دامی-تغذیه پرندگان

    فردوسی مشهد، مشهد، ایران

  • کارشناسی‌ارشد (1385)

    علوم دامی-غذا و تغذیه

    گیلان، رشت، ایران

  • کارشناسی (1383)

    علوم دامی

    فردوسی مشهد، مشهد، ایران

  • مدلسازی در تغذیه دام و طیور (اسید آمینه، افزودنی، رشد)
  • کشاورزی و دامپروری دیجیتال با استفاده از هوش مصنوعی و آموزش ماشین
  • تحلیل سیستمهای کشاورزی-دامی (شبکه، بهینه سازی، علوم داده)
  • مدلسازی علوم زیستی و کشاورزی

دکتر حامد احمدی عضو هیات علمی دانشکده کشاورزی دانشگاه تربیت مدرس است. وی دانش آموخته کارشناسی علوم دامی 1383، کارشناسی ارشد غذا و تغذیه دام 1385، دکترای تخصصی علوم طیور 1391 می باشد.

ارتباط

رزومه

Improving seminal quality and reproductive performance in male broiler breeder by supplementation of camphor

Hamid Raei, Mohammad Amir Karimi Torshizi, Mohsen Sharafi, Hamed Ahmadi
Journal PapersTheriogenology , 2021 February 9, {Pages }

Abstract

The current study was conducted to evaluate the effect of dietary camphor levels as a medicinal feed additive to improve semen quality, antioxidant capacity, reproductive hormones, and reproduction performance in roosters. For this purpose, thirty-five 29-wk-old Ross 308 broiler breeder roosters randomly were assigned to five experimental groups (seven birds/group) and received five doses of camphor containing 0, 50, 250, 750, and 1000 mg camphor/kg of feed for 12 wk consecutive. Semen quality parameters and motion characteristics of sperm were evaluated every 28 days and semen antioxidant capacity and plasma reproductive hormones concentration were tested at the end of the experiment. Also, at the end of the experiment, reproductive perfor

The Efficiency of Probiotic and Toxin Binders (Organic and Inorganic) in Amelioration of Aflatoxin Impact on Performance, Serum Biochemistry, and Tibia Characteristics in …

F Khorshidi, MA Karimi Torshizi, H Ahmadi, H Arak, N Mojgani
Journal Papers , , {Pages }

Abstract

Effects of gelatin as an alternative protein source and mono-component protease supplementation on growth performance, viscosity, digestibility and microbial population of …

Z Olfati, F Shariatmadari, MAK Torshizi, H Ahmadi, M Sharafi, MR Bedford
Journal Papers , , {Pages }

Abstract

Novel organic-based postharvest sanitizer formulation using Box Behnken design and mathematical modeling approach: A case study of fresh pistachio storage under modified

Abdollatif Sheikhi, Seyed Hossein Mirdehghan, Mohammad Mehdi Arab, Maliheh Eftekhari, Hamed Ahmadi, Saeid Jamshidi, Shahin Gheysarbigi
Journal PapersPostharvest Biology and Technology , Volume 160 , 2020 February 1, {Pages 111047 }

Abstract

In the present study Box Behnken Design (BBD) and Artificial Neural Network-Genetic Algorithm (ANN-GA) hybrid system were used for predicting and optimizing a new organic-based postharvest sanitizer for fresh pistachio nuts under modified atmosphere packaging, combining different concentrations of five generally recognized as safe (GRAS) ingredients including H2O2 (1, 3 and 5%), Na2CO3 (1, 3 and 5%), K2CO3 (1, 3 and 5%), citric acid (CA) and acetic acid (AA, 1000, 5500 and 10,000 mg L−1). The nuts were submerged in sanitizer solutions for two minutes then dried for five minutes in ambient condition and packaged in polyethylene bags injected with ambient atmospheric gas (21% O2, 0.03% CO2, and 87% N2). BBD as a computer-based design of

Mathematical modeling of growth and paclitaxel biosynthesis in Corylus avellana cell culture responding to fungal elicitors using multilayer perceptron-genetic algorithm

Mina Salehi, Siamak Farhadi, Ahmad Moieni, Naser Safaie, Hamed Ahmadi
Journal PapersFrontiers in plant science , Volume 11 , 2020 January , {Pages }

Abstract

Paclitaxel is the top-selling anticancer medicine in the world. In vitro culture of Corylus avellana has been made known as a promising and inexpensive strategy for producing paclitaxel. Fungal elicitors have been named as the most efficient strategy for enhancing the biosynthesis of secondary metabolites in plant cell culture. In this study, endophytic fungal strain HEF 17 was isolated from C. avellana and identified as Camarosporomyces flavigenus. C. avellana cell suspension culture (CSC) elicited with cell extract (CE) and culture filtrate (CF) derived from strain HEF 17, either individually or combined treatment, in mid and late log phase was processed for modeling and optimizing growth and paclitaxel biosynthesis regarding CE and CF co

Interactive Effects of Glycine Equivalent, Cysteine, and Choline on Growth Performance, Nitrogen Excretion Characteristics, and Plasma Metabolites of Broiler Chickens Using?…

Philipp Hofmann, Wolfgang Siegert, Hamed Ahmadi, Jochen Krieg, Moritz Novotny, Victor D Naranjo, Markus Rodehutscord
Journal PapersAnimals , Volume 10 , Issue 8, 2020 August , {Pages 1392 }

Abstract

Responses of broiler chickens to dietary glycine equivalent (Gly equi) are affected by dietary cysteine and choline. Hence, this study investigated interactive effects among dietary Gly equi, cysteine, and choline on the growth of broiler chickens. Male Ross 308 broiler chickens were maintained in 105 metabolism units (10 birds/unit) from days 7 to 22. Excreta were collected in 12-h intervals from days 18 to 21. Blood was sampled on day 22 (1 bird/unit). Five levels each of Gly equi (9–21 g/kg), cysteine (2–5 g/kg), and choline (0.5–1.7 g/kg) were tested under 15 diets in 7 replicates each following a fractional central composite design. Another diet was provided to five metabolism units (15 birds/unit) to measure prececal amino acid

Estimation and Prediction of Metabolizable Energy Contents of Wheat Bran for Poultry

M Lotfi, F Shariatmadari, H Ahmadi, M Sharafi
Journal PapersJournal of Agricultural Science and Technology , Volume 22 , Issue 4, 2020 June 10, {Pages 965-976 }

Abstract

The biological procedure used to determine the nitrogen-corrected True Metabolizable Energy (TMEn) value of feed ingredient is costly and time consuming. Therefore, it is necessary to find an alternative method to accurately estimate the TMEn content. In this study, 2 methods of Multiple Linear Regression (MLR) and Artificial Neural Network (ANN) were developed to describe the TMEn (Kcal kg-1 DM) value on a Dry Matter (DM) basis of Wheat Bran (WB) samples given their chemical composition of Ether Extract (EE), ash, Crude Protein (CP) and Crude Fiber (CF) contents (all used as% of DM). A data set containing 100 WB samples were used to determine chemical composition and TMEn. Accuracy and precision of the developed models were evaluated given

A Gaussian process regression model to predict energy contents of corn for poultry

Abbas Abdullah Baiz, Hamed Ahmadi, Farid Shariatmadari, Mohammad Amir Karimi Torshizi
Journal PapersPoultry Science , 2020 August 18, {Pages }

Abstract

The present study proposes a Gaussian process regression (GPR) approach to develop a model to predict true metabolizable energy corrected for nitrogen (TMEn) content of corn samples (as model output) for poultry given levels of feed chemical compositions of crude protein, ether extract, crude fiber, and ash (as model inputs). A 30 corn samples obtained from 5 origins [Brazil (n = 9), China (n = 5), Iran (n = 7), and Ukraine (n = 9)] were assayed to determine chemical composition and TMEn content using chemical analyses and bioassay technique. In addition to GPR model, data were also analyzed by multiple linear regression (MLR) model. Results revealed that corn samples of different origins differ in their gross energy and chemical compositio

Description of Growth Patterns in a Crossbred Population of Native? Commercial Broiler Chicken

R Seifi Moroudi, S Ansari Mahyari, R Vaez Torshizi, H Ahmadi
Journal PapersJournal of Agricultural Science and Technology , Volume 22 , Issue 6, 2020 November 10, {Pages 1449-1462 }

Abstract

Four nonlinear models including Logistic, Gompertz-Laird, Richards, and von Bertalanffy were compared to achieve the best prediction of growth parameters describing the growth curve in a crossbred chicken population. Growth data (weekly body weights of chicken from birth to 84 days of age) were collected on 303 birds (174 females and 129 males) of F2 cross of the Arian line broiler chicken (Line B) and Urmia native chicken. Some statistical criteria such as Akaike Information Criterion (AIC), Corrected Akaike Information Criterion for small sample sizes (AICc), and Bayesian Information Criterion (BIC) were used to find the best model. The results showed that the estimated values of the initial weight (W0) and final Weight (Wf) in male were

Effects of gelatin as an alternative protein source and mono-component protease supplementation on growth performance, viscosity, digestibility and microbial population of?…

Z Olfati, F Shariatmadari, MA Karimi Torshizi, H Ahmadi, M Sharafi, MR Bedford
Journal PapersLivestock Science , 2020 November 3, {Pages 104326 }

Abstract

An experiment was conducted to investigate the effects of using gelatin as a partial protein source and protease in broilers diets. The experiment was carried out as a factorial arrangement, containing two levels of protease (0 and 200 gs per ton of diet) and four levels of gelatin (0, 2.82, 4.23 and 5.64% of the diet replacing 12.5, 18.75 and 25% of the SBM protein, respectively) with 6 replicates and 15 chicks in each pen. Body weight, feed intake and FCR were measured at day 7, 21 and 35. Ileal digesta viscosity, ileal morphology and ileal coliform and lactobacilli population were measured at day 35. In addition, apparent protein digestibility was determined between 28 and 35 days of age. Results show that the highest inclusion rate of g

Effects of partial replacement of soybean meal in broiler diets with gelatin and mono-component protease on growth performance, carcass and blood biochemical characteristics?…

Z Olfati, F Shariatmadari, MA Karimi Torshizi, H Ahmadi, M Sharafi, MR Bedford
Journal PapersAnimal Production Science , 2020 November 9, {Pages }

Abstract

Context Gelatin, presently a waste material from animal tissues and bones, may be suitable as a partial dietary replacement for soybean meal. In combination with protease, it may enhance growth performances of broiler chickens. However, limitations when introducing gelatin, are its unusual amino acid profile and digesta viscosity. Aim An experiment was conducted to elucidate effects on growth performance, blood biochemistry, carcass and meat characteristics, and feed costs of partial replacement of soybean meal with gelatin and protease in broilers diets. Methods The experimental design was a factorial arrangement of two levels of mono-component protease (0 and 200 g/t diet) and four levels of gelatin (0%, 2.82%, 4.23% and 5.64% of the diet

Meta-analysis of metabolizable energy of wheat samples in poultry for determining regression equations based on chemical compositions

Hamed Ahmadi, Vahid Rasoli Marivani, Yousef Mohammadi
Journal PapersAnimal Production , Volume 22 , Issue 2, 2020 June 21, {Pages 281-288 }

Abstract

The goal of this study was to determine regression equations to predict metabolizable energy of wheat samples given their chemical?compositions using meta-analytical approach. A database compromising chemical compositions and apparent metabolizable energy corrected??for the nitrogen (AMEn) of 111 published sources of wheat strains was used. Sample information contains crude protein (CP), ether extract?(EE), crude fiber (CF), ash and AMEn. Average values for AMEn was calculated as 2917.46 (kcal/kg), while for the CP, EE, CF, ash was?calculated as 12.53, 2.12, 1.61and 1.56 (% dry matter), respectively. Meta-regression equations for predicting AMEn wheat based on?chemical composition were developed and evaluated by means of provided database.

The effects ofdietary Flaxseed and Sesame oils on reproductive performance of aged breeder broiler males

Hossein Pasha Zanussi, Farid Shariatmadari, Mohsen Sharafi, Hamed Ahmadi
Journal PapersAnimal Production , Volume 22 , Issue 1, 2020 March 20, {Pages 79-92 }

Abstract

This study was conducted to assess the effects of dietary flaxseed and sesame oils, on the semen parameters, fatty acid composition of sperm?as well as the fertility and hatchability eggs from aged roosters. In a completely randomized design, 24 Ross-308 roosters (aged 45 week)?assigned to four groups, comprising six replicates and one bird in each. The birds received different diets including basal diet (control), basal?diet supplemented with 2% flaxseed oil (FO), basal diet supplemented with 2% sesame oil (SO) and basal diet supplemented with 1%?flaxseed oil and 1% sesame oil (MO). The diets were iso-caloric and iso-nitrogenous, containing the same level of vitamin E. The roosters?were fed diet for 60 days, during which semen samples were

Measurement and Development of Prediction Models for Metabolizable Energy Contents of Corn Samples Collected from Poultry Feed Factories in Iran using Regression Equations

Abbas Abdullah Baiz, Hamed Ahmadi, Farid Shariatmadari, Mohammad Amir Karimi Torshizi
Journal PapersResearch On Animal Production (Scientific and Research) , Volume 11 , Issue 28, 2020 June 10, {Pages 50-58 }

Abstract

The purpose of this study was to determine the contents of chemical compositions, apparent metabolizable energy (AME), apparent metabolizable energy corrected for nitrogen (AMEn), true metabolizable energy (TME), true metabolizable energy corrected for nitrogen (TMEn), in corn samples, as well as to predict diferrent energy contents of corn samples given their chemical components. A total of 30 samples were colleted from Iranian poultry feed plants. Metabolizable energy criterias of each sample were obtained by percision feeding method with 4 replications. Based on laboratory assessments, average of dry matter, crude protein, crude fat, crude fiber, ash, starch and glucose were 90.02, 9.15, 3.28, 3.93, 1.45, 65.33 and 9.79 (% of DM), respec

Description of Growth Patterns in a Crossbred Population of Native× Commercial Broiler Chicken

R Seifi Moroudi, S Ansari Mahyari, R Vaez Torshizi, H Ahmadi
Journal Papers , , {Pages }

Abstract

Effects of partial replacement of soybean meal in broiler diets with gelatin and mono-component protease on growth performance, carcass and blood biochemical characteristics …

Z Olfati, F Shariatmadari, MAK Torshizi, H Ahmadi, M Sharafi, MR Bedford
Journal Papers , , {Pages }

Abstract

Interactive Effects of Glycine Equivalent, Cysteine, and Choline on Growth Performance, Nitrogen Excretion Characteristics, and Plasma Metabolites of Broiler Chickens Using …

P Hofmann, W Siegert, H Ahmadi, J Krieg, M Novotny, VD Naranjo, ...
Journal Papers , , {Pages }

Abstract

Novel organic-based postharvest sanitizer formulation using Box Behnken design and mathematical modeling approach: A case study of fresh pistachio storage under modified …

A Sheikhi, SH Mirdehghan, MM Arab, M Eftekhari, H Ahmadi, S Jamshidi, ...
Journal Papers , , {Pages }

Abstract

Evaluating two multistrain probiotics on growth performance, intestinal morphology, lipid oxidation and ileal microflora in chickens

Seyed Amin Kazemi, Hamed Ahmadi, Mohammad A Karimi Torshizi
Journal PapersJournal of animal physiology and animal nutrition , 2019 May 29, {Pages }

Abstract

An experiment was conducted to investigate the supplementation of two commercially available multistrain probiotics as an alternative to antibiotics on growth performance, intestinal morphology, lipid oxidation and ileal microflora in broiler chickens. A total of 280‐day‐old ROSS 308 mixed‐sex broiler chickens with an average initial body weight of 42???0.5?g were randomly divided into four treatments with five replicate cages of 14 birds each cage in a completely randomized design and fed with the following diets for 42?day: (a) control (CON) (antibiotic‐free diet), (b) antibiotic (ANT) (CON?+?Avilamycin 150?g/ton feed), (c) probiotic A (CON?+?Protexin? 150?g/ton feed) and (d) probiotic B (CON?+?Bio‐Poul? 200?g/ton feed). The re

Dietary supplementation with flaxseed oil as source of Omega-3 fatty acids improves seminal quality and reproductive performance in aged broiler breeder roosters

Hossein Pasha Zanussi, Farid Shariatmadari, Mohsen Sharafi, Hamed Ahmadi
Journal PapersTheriogenology , Volume 130 , 2019 May 1, {Pages 41-48 }

Abstract

Reproductive performance in aged broiler breeder roosters is not desirable. The purpose of this study was to assess the effects of dietary flaxseed oil and vitamin E on the semen parameters, hormonal profiles, fatty acid analysis of sperm, and fertility performance of aged roosters. Twenty four roosters were assigned into four treatments and received their diets as following: 1) basal diet as control group (CTRL), 2) basal diet supplemented with 200?mg/kg vitamin E (CTRL?+?VITE), 3) basal diet supplemented with 2% flaxseed oil (FLAX) and 4) basal diet supplemented with 2% flaxseed oil plus 200?mg/kg vitamin E (FLAX?+?VITE). Roosters were fed their diets for 60 days and then, different characteristics of reproduction in the roosters were exa

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  • 1397
    اساسي, رويا
    مدل¬سازي پاسخ جوجه¬هاي گوشتي به مصرف اسيدهاي آمينه ال-متيونين و ال-آرژنين
  • 1398
    صيدمرادي كهره, فريبا
  • 1399
    مشاهيري, سيامك
    داده ای یافت نشد
  • فلوشیپ پژوهشی از موسسه هومبولت 2020 تا 2024 Georg Forster Research Fellowship Programme for Experienced Researchers-Alexander von Humboldt Foundation

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