Journal of Dairy Science
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#1P.S. Yoder (SU: Salisbury University)H-Index: 3
#2J.J. CastroH-Index: 2
Last. Mark D. Hanigan (VT: Virginia Tech)H-Index: 29
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ABSTRACT null null Understanding the regulation of cellular AA uptake as protein supply changes is critical for predicting milk component yields because intracellular supplies partly regulate protein synthesis. Our objective was to evaluate cellular uptake and kinetic behavior of individual AA when cells are presented with varying extracellular AA supplies. Bovine primary mammary epithelial cells were grown to confluency and transferred to medium with an AA profile and concentration similar to t...
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#1Alejandro G. Marangoni (U of G: University of Guelph)H-Index: 59
#2Saeed M. Ghazani (U of G: University of Guelph)H-Index: 8
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#1Kevin J. Harvatine (PSU: Pennsylvania State University)H-Index: 25
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#2M. AguilarH-Index: 1
Last. Mark D. HaniganH-Index: 29
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#1E. Wynands (UMN: University of Minnesota)
#2S.M. Roche (U of G: University of Guelph)H-Index: 8
Last. Beth A. Ventura (UMN: University of Minnesota)H-Index: 10
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ABSTRACT null null Lameness is a leading animal welfare concern in the dairy industry. Multiple stakeholders are involved in lameness management on a dairy farm, including farmers, hoof trimmers, and veterinarians. This study sought to explore perceptions of lameness, perceptions of roles in lameness management, and barriers to improved lameness management in these groups. Fourteen homogeneous focus groups were held in Minnesota, Wisconsin, and New York from April 2017 to March 2020; 5 with farm...
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#1Joonpyo Oh (PSU: Pennsylvania State University)H-Index: 18
#2M. T. Harper (PSU: Pennsylvania State University)H-Index: 12
Last. Alexander N. Hristov (PSU: Pennsylvania State University)H-Index: 61
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ABSTRACT null null In ruminants, it has been observed that capsicum oleoresin can alter insulin responses and that high-intensity artificial sweetener can increase glucose absorption from the small intestine. Because glucose metabolism and insulin responses are critical during early lactation, these supplements might have an effect on the metabolic status of dairy cows during the transition period. The objective of this experiment was to evaluate the effects of rumen-protected capsicum oleoresin...
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#1E. Liu (MSU: Michigan State University)H-Index: 2
#2Mark D. Hanigan (VT: Virginia Tech)H-Index: 29
Last. Michael J. VandeHaar (MSU: Michigan State University)H-Index: 33
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ABSTRACT null null Our objective was to quantify the contribution of body weight (BW) change to the overall response of lactating dairy cows to a shortage of dietary protein. Lactating Holstein cows (n = 166; 92 primiparous, 74 multiparous) with initial milk yield of 41 ± 10 kg/d were fed high and low-protein diets in 7 blocks. Blocks were repeated in the same crossover design with periods of 28 to 35 d. Production of 69 of the 166 cows (42 primiparous, 27 multiparous) was also measured in late ...
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#1Barbara A. Murphy (UCD: University College Dublin)H-Index: 18
#2M.M. Herlihy (Teagasc)H-Index: 14
Last. Stephen T. Butler (Teagasc)H-Index: 17
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ABSTRACT null null Long-day photoperiod is known to positively affect milk production in confinement dairy systems, and it has been hypothesized that pineal melatonin (MT) secretion plays a substantial role in this process. Specialized mammalian photoreceptors that regulate MT secretion are optimally stimulated by short wavelength blue light. We investigated the blue light intensity administered to one eye required to suppress MT secretion in nonlactating dairy cows, and subsequently examined ef...
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#1Jimena Laporta (UW: University of Wisconsin-Madison)H-Index: 18
ABSTRACT null null Global rising temperature is a considerable threat to livestock production and an impediment to animal welfare. In fact, the 5 warmest years on record have occurred since 2016. Although the effect of heat stress on lactating cattle is well recognized and extensively studied, it is increasingly evident that rising temperatures will affect dairy cattle of all ages and lactation states. However, the extent and consequences of this effect are less understood and often overlooked i...
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#1Wang Guangqiang (USST: University of Shanghai for Science and Technology)H-Index: 15
#2Jing Pu (USST: University of Shanghai for Science and Technology)
Last. Lianzhong Ai (USST: University of Shanghai for Science and Technology)H-Index: 20
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ABSTRACT null null Freeze drying is one of the most convenient ways to preserve microorganisms, but in the freeze-drying process, strains will inevitably suffer varying degrees of damage under different conditions. The deterioration of cell membrane integrity is one of the main forms of damage. The type and ratio of fatty acids in the cell membrane affect its characteristics. Therefore, it is worth investigating whether certain fatty acids can increase freeze-drying resistance. In this study, we...
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Animal science
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Lactation
Dairy cattle
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