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142 articles for “COW”
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Research ArticleOpen accessEvery word in the titleTRANSCRIPTOMIC CHANGES IN RUMINAL TISSUE INDUCED BY THE PERIPARTURIENT TRANSITION IN DAIRY COWSLouis Dionissopoulos, Ousama AlZahal, Michael Alexander Steele et al.To understand how the capacity for fat metabolism (uptake, synthesis, modification) changes in rumen epithelia immediately before and after onset of lactation in dairy cows, rumen fluid Short Chain Fatty Acid (SCFA) concentrations and mRNA expression profiles of rumen epithelia was determined in twelve Holstein dairy cows at three weeks prior to calving (wk -3, n = 12), one week … …American Journal of Animal and Veterinary Sciences, Vol. 9, Issue 1 · 13 Jan 2014 · 7,505 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffects of Rumen-Protected Methionine on Dairy Performance and Amino Acid Metabolism in Lactating CowsW.R. Yang, H. Sun, Q.Y. Wang et al.Problem statement: Free Met as one of the most limiting AA in dairy cows would be mostly degraded in the rumen. This study was to determine the effect of different levels of Rumen-Protected Met (RPMet) on dairy performance and serum amino acid metabolism. Approach: Thirty-six Holstein cows in similar condition were randomly assigned to six experimental treatments with six replicates … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 1 · 31 Jan 2010 · 8,269 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAssociation of Reproductive Problems and Dairy Cow Productivity in a Farm with an Outbreak of Neosporosis Abortion in BrazilFrancisco Carlos Rodrigues de Oliveira, Samira Salim Mello Gallo, Murilo de Oliveira Bôa-Morte, Nicole Brand EderliNeosporosis is a disease caused by the protozoan Neospora caninum and its only clinical symptom in adult cows is abortion. In order to determine whether N. caninum was associated with an outbreak of abortion on a high milk production dairy farm with excellent livestock and health control standards, blood was collected from all the animals in the herd to obtain … …American Journal of Animal and Veterinary Sciences, Vol. 14, Issue 1 · 1 Feb 2019 · 7,462 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNUTRITIONAL CHARACTERISTICS OF THE DAIRY COW DURING EARLY GESTATION AND SUBSEQUENT GROWTH AND CARDIAC MEASUREMENTS OF HER OFFSPRINGJ. E. Larson, B. E. Voelz, D. K. Hardin, C. O. LemleyThe objective was to determine whether maternal nutritional status and milk production during early gestation influenced or were correlated with parameters of the calf at birth and at 1 month of age. From parturition until 90 days pregnant, blood samples were collected every 14 days in dairy cows and plasma was assayed for concentrations of glucose and β-Hydroxybutyrate (BHBA). Calves … …American Journal of Animal and Veterinary Sciences, Vol. 9, Issue 3 · 15 Sep 2014 · 7,629 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Effect of Rumen Acid Load on Postpartum Performance and Blood Metabolic Responses in Transition Holstein CowsSadjad Danesh Mesgaran, Alireza Vakili, Alireza Heravi Moosavi, Ghasem KoolabadiProblem statement: The transition period is the most stressful time in the production cycle of a dairy cow because of depressed feed intake, endocrine and metabolic changes at parturition. The aim was to determine the effect of rumen acid load on postpartum performance and metabolic parameters in transition Holstein cows. Approach: The Acidogenicity Values (AV) of the diets were determined … …American Journal of Animal and Veterinary Sciences, Vol. 6, Issue 1 · 25 May 2011 · 7,444 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Intramammary Injection of Nigella Sativa on Somatic Cell Count and Staphylococcus Aureus Count in Holstein Cows with S. aureus Subclinical MastitisHamideh Ghodrati Azadi, Nima Farzaneh, Zahra Baghestani et al.Problem statement: The seeds of Nigella sativa Linn. (Ranunculaceae) known as black seed or black cumin, are used in herbal medicine all over the world for the treatment and prevention of a number of diseases and conditions that include asthma, diarrhea and dyslipidaemia. Approach: In this study the effect of intramammary injection of Nigella Sativa Extract (NSE) in paraffin on … …American Journal of Animal and Veterinary Sciences, Vol. 6, Issue 1 · 26 Apr 2011 · 8,300 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePrevalence and Distribution of Mastitis Pathogens and their Resistance against Antimicrobial Agents in Dairy Cows in JordanAzmi D. Hawari, Fawzi Al-DabbasThe primary objective of this study was to determine the aetiology of bovine mastitis in ten herds of Holstein Friesian cow in Jordan, the prevalence of mastitis pathogens in dairy cows and their resistance to selected antimicrobial agents. Milk samples were collected from 220 lactating cows to determine the clinical and subclinical mastitis by white side test and confirmed by … …American Journal of Animal and Veterinary Sciences, Vol. 3, Issue 1 · 31 Mar 2008 · 7,681 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffectiveness of the Anaerobic Haylage Method for Flax Waste Utilization in the Diet of Friesian Holstein CowsRuly Budiono, Joko Kusmoro, Erin Nurinsani Waafi, SukonoThe haylage dry feed fermentation method is one of the methods of preserving grass feed, dried herbs, or dry agricultural waste for animal feed. This study aims to determine the quality of hemp flakes waste that has been dried for 6 months and has a water content of <3% using the Haylage method. The research parameters include physical quality, pH, … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 31 Mar 2026 · 1,274 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Culture of Oocytes from Dairy Cows' Ovaries for Productivity in the Southeastern Region of KazakhstanDauren Maratovich Bekenov, Batyrkhan Azimkhanovich Buralkhiev, Yusupzhan Artykovich Yuldashbayev et al.This research work aims to study methods for isolating and culturing follicular oocytes from Holstein cows in vitro. The proven complex of technologies for embryo transplantation on an industrial scale will provide a 3-5-fold acceleration of reproduction of highly productive cows. As a result of scientific research, biotechnological methods of accelerated reproduction of dairy cattle have been substantiated and introduced … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 14 Oct 2024 · 4,304 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePrevention of Heat Stress in Lactating CowsVladimir Zaitsev, Vasily Korotkiy, Nadezhda Bogolyubova et al.In summer, when the air temperature rises, dairy cattle are very susceptible to heat stress, which results in a significant decline in productivity. The goal of the study is to assess how a Coniferous Energy Supplement (CES) made from raw materials derived from forestry waste affects lactating cows' ruminal digestion, milk production, and quality in extreme temperatures. Two sets of … …American Journal of Animal and Veterinary Sciences, Vol. 19, Issue 1 · 19 Dec 2023 · 5,115 accessesView PDFCite