Effects Of Varying Rates Of Tallgrass Prairie Hay And Wet Corn Gluten Feed On Productivity Of Dairy Cows (2010),
2010
Kansas State University Libraries
Effects Of Varying Rates Of Tallgrass Prairie Hay And Wet Corn Gluten Feed On Productivity Of Dairy Cows (2010), D.J. Rezac, K.N. Grigsby, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
Productivity of lactating dairy cows was assessed when fed diets containing wet corn gluten feed (WCGF; Sweet Bran, Cargill Inc.) as the primary energy substrate and prairie hay as the primary source of physically effective neutral detergent fiber (peNDF) compared with a control diet. Treatment diets were: 1) a control diet with 18% alfalfa, 18% corn silage, 33% WCGF, and 15% forage NDF (CON); 2) a diet with 20% tallgrass prairie hay, 46% WCGF, and 13% forage NDF (TPH20); and 3) a diet with 14% tallgrass prairie hay, 56% WCGF, and 9% forage NDF (TPH14). Midway through period 2, the …
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010),
2010
Kansas State University Libraries
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010), Stephanie Leeann Pulley, L.D. Wallace, H.I. Mellieon, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to evaluate the effects of equine chorionic gonadotropin (eCG) on various characteristics associated with an effective timed artificial insemination (AI) protocol in lactating dairy cows. Cows (n = 121) in a single herd were treated with 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 11 days before the onset of a timed AI protocol. Cows received either saline or 400 IU eCG concurrent with the PGF2αinjection of the Ovsynch protocol (injection of gonadotropinreleasing hormone or GnRH, 7 days before and 48 to 56 hours after PGF2αwith insemination occurring …
Control De Poblaciones De E. Coli Y Otros Coliformes A Partir De La Concentración De Ácidos Grasos Volátiles En La Leche Bovina De Raza Holstein Estudio De Caso En La Sabana De Bogotá,
2010
Universidad de La Salle, Bogotá
Control De Poblaciones De E. Coli Y Otros Coliformes A Partir De La Concentración De Ácidos Grasos Volátiles En La Leche Bovina De Raza Holstein Estudio De Caso En La Sabana De Bogotá, Andrés Mauricio Díaz Franco
Zootecnia
Dado que en el campo hay productores que no tienen la tecnología para preservar la leche mientras esta es recogida, se busca un método alternativo de preservar el producto de la proliferación de coliformes totales a partir de la concentración los Ácidos Grasos Volátiles (AGVs), ya que estos se han venido utilizando para combatir otras bacterias de características patogénicas como Salmonella. La investigación se desarrollo tomando muestras de diferentes municipios de la Sabana de Bogotá, después de medir los parámetros básicos del producto como pH y sólidos totales se realizaron micro concentraciones (de 10µ a 1000µ), para determinar por medio …
Dopaminergic Input To The Equine Pituitary: Seasonal And Estradiol Effects,
2010
Louisiana State University and Agricultural and Mechanical College
Dopaminergic Input To The Equine Pituitary: Seasonal And Estradiol Effects, Sarah Case Clavier
LSU Master's Theses
Two experiments were conducted to study the effects of season and estradiol administration on dopaminergic input to the equine adenohypophysis. Experiment 1 began in the spring with 8 mares and 8 stallions and was repeated again in the summer, fall, and winter. Horses were given sulpiride injections of eight incremental doses (0.25 to 32 µg/kg BW). Within each group of 8 horses, half received the sulpiride in an increasing manner, the other half in a decreasing manner. Prolactin concentrations peaked in the first 15 to 30 min in all horses in all seasons. Prolactin areas under the curve increased (P < 0.001) with increasing doses of sulpiride, and were highest (P < 0.05) in March for stallions, but in June for mares. The calculated half-maximum values, which should be proportional to the dopaminergic input to the pituitary, were lowest (P < 0.05) in June and greatest in September. The variation in half-maximum values with season indicated a change in dopaminergic input to the pituitary, with lowest input occurring in June in both sexes. Experiment 2 was designed to determine if the degree of dopaminergic input to the adenohypophysis is altered by estradiol administration. Twelve geldings were used. On day 0, geldings received an i.m. injection of either estradiol cypionate (ECP; n = 6) or vegetable oil (n = 6) at one of two dose volumes (2 vs. 10 mL). On day 6, all geldings received an injection of sulpiride at 0.082 µg/kg BW in saline. Sulpiride injections were repeated every other day with the dose increasing each day, from 0.164 to 100 µg/kg BW. Estradiol pretreatment increased (P < 0.05) the prolactin response to sulpiride at the 2.56 µg/kg dose and higher. However, the half-maximum values for ECP-treated and control geldings did not differ, indicating that the amount of sulpiride needed to counterbalance the amount of dopamine reaching the pituitary was unaltered by estradiol treatment. It was concluded that estradiol likely stimulates prolactin production and secretion after sulpiride directly at the lactotrope level, rather than by decreasing hypothalamic dopamine input to the lactotropes.
Influence Of Low Homogenization Pressures On Acid Tolerance, Bile Tolerance, Protease Activity, And Growth Characteristics Of Lactobacillus Delbrueckii Ssp Bulgaricus Lb-12, Streptococcus Salivarius Ssp Thermophilus St-M5, And Lactobacillus Acidophilus La-K,
2010
Louisiana State University and Agricultural and Mechanical College
Influence Of Low Homogenization Pressures On Acid Tolerance, Bile Tolerance, Protease Activity, And Growth Characteristics Of Lactobacillus Delbrueckii Ssp Bulgaricus Lb-12, Streptococcus Salivarius Ssp Thermophilus St-M5, And Lactobacillus Acidophilus La-K, Tanuja Muramalla
LSU Master's Theses
Lactobacillus delbrueckii ssp bulgaricus LB-12, Streptococcus salivarius ssp thermophilus ST-M5 and Lactobacillus acidophilus LA-K are dairy cultures widely used in the fermentation of dairy products. Homogenization is an essential process in dairy industry for making several products. High homogenization pressures (>50 MPa) are used to create stable emulsion, inactivate the pathogens and increase the protease activity of dairy cultures. Sparse literature is available on the influence of low homogenization pressures, and their effect on beneficial characteristics of dairy cultures is not well understood. The objective of this study was to determine the effect of low homogenization pressures on acid …
Lysine Degradation By Ruminal Fusobacteriumnecrophorum (2010),
2010
Kansas State University Libraries
Lysine Degradation By Ruminal Fusobacteriumnecrophorum (2010), E.A. Elwakeel, R.G. Amachawadi, A.M. Nour, M.E. Nassar
Kansas Agricultural Experiment Station Research Reports
Three experiments were conducted to characterize lysine fermentation by Fusobacterium necrophorum, a ruminal bacterium that is known to degrade amino acids. In Experiment 1, 7 strains of Fusobacterium necrophorum were inoculated into media containing lysine (50 mM), lactate (50 mM), or lysine plus lactate (50 mM each) as the major energy substrate to evaluate growth and ammonia production. All strains grew with lysine, lactate, or lactate plus lysine as the primary substrate. When grown with lysine, all strains produced ammonia as an end product, even if lactate was also present. Smaller concentrations of ammonia for medium containing lactate plus lysine …
Bioavailability Of Lysine From Hydroxymethyl Lysine (2010),
2010
Kansas State University Libraries
Bioavailability Of Lysine From Hydroxymethyl Lysine (2010), E.A. Elwakeel, Evan C. Titgemeyer, D.W. Brake, A.M. Nour
Kansas Agricultural Experiment Station Research Reports
Twelve mature sheep were used as a ruminant model to estimate the bioavailability of lysine in hydroxymethyl lysine (HML) compared with a commercial product of rumen-protected lysine (RPL; LysiPEARL, Kemin Industries, Inc.) with known availability. The sheep were fed a diet with a forage to concentrate ratio similar to that of dairy diets. Following a control period in which plasma lysine was measured when sheep received no supplemental lysine, the sheep were provided 2 of 4 treatments during periods 2 and 3; treatments included RPL to provide 3 or 6 g/day of available lysine (actual amounts of product provided were …
