Browsing Scholarly Works, Department of Dairy Science by Title
Now showing items 1-20 of 64
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AgroSeek: a system for computational analysis of environmental metagenomic data and associated metadata
(2021-03-10)Background Metagenomics is gaining attention as a powerful tool for identifying how agricultural management practices influence human and animal health, especially in terms of potential to contribute to ... -
Amino Acid Metabolomic Profiles in Bovine Mammary Epithelial Cells under Essential Amino Acid Restriction
(MDPI, 2021-05-07)Mammary epithelial cells (MECs) in culture are a useful model for elucidating mammary gland metabolism and changes that occur under different nutrient disponibility. MECs were exposed to different treatments: 100% EAA for ... -
Antibiotic resistance genes in the faeces of dairy cows following short-term therapeutic and prophylactic antibiotic administration
(2019-12-06)The objective of the research was to quantify three antibiotic resistance genes (tetQ, cfxA and mefA) in the faeces of dairy cows following therapeutic and prophylactic antibiotic treatments. Manure collected from dairy ... -
Assessing amino acid uptake and metabolism in mammary glands of lactating dairy cows intravenously infused with methionine, lysine, and histidine or leucine and isoleucine [Appendix]
(2020-12-02)The objective of this study was to evaluate the effect of jugular infusions of 2 groups of AA on essential AA (EAA) transport and metabolism by mammary glands. Four Holstein cows in second lactation (66 ± 10 days in milk) ... -
Bayesian QTL mapping using skewed Student-tdistributions
(2002-01-15)In most QTL mapping studies, phenotypes are assumed to follow normal distributions. Deviations from this assumption may lead to detection of false positive QTL. To improve the robustness of Bayesian QTL mapping methods, ... -
Can consumers’ willingness to pay incentivize adoption of environmental impact reducing technologies in meat animal production?
(2014-12)This study develops a model estimating consumer willingness to pay (WTP) for environmental meat attributes and uses a multi-objective nutritional optimizer to explore the extent to which WTP can offset on-farm costs of ... -
Challenges in enriching milk fat with polyunsaturated fatty acids
(Biomed Central Ltd, 2015-06-12)Milk fatty acid composition is determined by several factors including diet. The milk fatty acid profile of dairy cows is low in polyunsaturated fatty acids, especially those of the n-3 series. Efforts to change and influence ... -
Combined effects of composting and antibiotic administration on cattle manure–borne antibiotic resistance genes
(2021-04-01)Background Research is needed to delineate the relative and combined effects of different antibiotic administration and manure management practices in either amplifying or attenuating the potential for ... -
Development and Validation of a UPLC-MS/MS Method to Monitor Cephapirin Excretion in Dairy Cows following Intramammary Infusion
(PLOS, 2014-11-06)Cephapirin, a cephalosporin antibiotic, is used by the majority of dairy farms in the US. Fecal and urinary excretion of cephapirin could introduce this compound into the environment when manure is land applied as fertilizer, ... -
Diet shifts provoke complex and variable changes in the metabolic networks of the ruminal microbiome
(2017-06-08)Background: Grazing mammals rely on their ruminal microbial symbionts to convert plant structural biomass into metabolites they can assimilate. To explore how this complex metabolic system adapts to the host animal's diet, ... -
Dietary phosphorus effects on characteristics of mechanically separated dairy manure
(American Society of Agricultural and Biological Engineers, 2005)One approach to reduce nutrient losses from livestock farms is to apply biological waste treatment systems such as biological nitrogen (N) removal or enhanced biological phosphorus (P) removal (EBPR) to reduce the nutrient ... -
The effect of aflatoxin B1 treatment on expression of transient receptor potential melastatin 8 in mouse ovary and testes
(Oxford University Press, 2019-12-16) -
Effect of composting and soil type on dissipation of veterinary antibiotics in land-applied manures
(2018)The objective of this study was to determine the fate of commonly used veterinary antibiotics in their naturally excreted form when manure-based amendments are applied to soil. Beef cattle were administered sulfamethazine, ... -
Effect of Dietary Fish Oil on Mammary Gland Development and Milk Production of Holstein Cow
(2018-10)The aim of this study was to evaluate the effect of feeding oil supplement on mammary gland development and milk production responses in Holstein cows. Ten multi pa rolls Holstein cows (42.2 +/- 9.2 d before calving, 3.25 ... -
Effect of drought stress on in vitro neutral detergent fiber digestibility of corn for silage
(2021-03)The objective of this study was to determine the effect of drought stress on neutral detergent fiber (NDF) and lignin (LIG) concentrations and on in vitro dry matter digestibility (IVDMD) and in vitro neutral detergent ... -
Effect of planting density on nutritional quality of green-chopped corn for silage
(American Dairy Science Association, 2014-09)The objective of this on-farm study was to determine the effect of corn planting density on the nutritional quality of whole-plant corn for silage. This study was performed in a commercial 1,900-cow dairy farm located in ... -
Effects of dietary cis 9, trans 11-18 : 2, trans 10, cis 12-18 : 2 or vaccenic acid (trans 11-18 : 1) during lactation on body composition, tissue fatty acid profiles, and litter growth in mice
(Cambridge University Press, 2003-12)Cis 9, trans 11 (c9, t11)-18:2 and trans 10, cis 12 (t10, c12)-18:2 are the major conjugated linoleic acid (CLA) isomers in dietary supplements which reduce milk fat content in nursing women. The present study evaluated ... -
The effects of dietary protein content and manure handling technique on ammonia emissions during short-term storage of dairy cow manure
(American Society of Agricultural and Biological Engineers, 2011)An improved understanding of the potential for dietary protein manipulation to reduce ammonia emissions from dairy farms during various stages of manure handling is needed for both modeling and policy-making efforts. The ... -
Effects of Essential Amino Acid Deficiency on General Control Nonderepressible 2/Eukaryotic Initiation Factor 2 Signaling and Proteomic Changes in Primary Bovine Mammary Epithelial Cells
(MDPI, 2022-02-25)We hypothesized that the general control nonderepressible 2 (GCN2)/eukaryotic initiation factor 2 (eIF2) signaling pathway and intracellular protein synthesis (PS) are regulated to maintain milk PS in primary bovine mammary ... -
Estimation of additive, dominance and epistatic variance components using finite locus models implemented with a single-site Gibbs and a descent graph sampler
(Cambridge University Press, 2000-10)In a previous contribution, we implemented a finite locus model (FLM) for estimating additive and dominance genetic variances via a Bayesian method and a single-site Gibbs sampler. We observed a dependency of dominance ...
