Scientists at the Roman L. Hruska U.S. Meat Animal Research Center (USMARC) develop new technology in order to increase the efficiency of livestock production and benefit consumers. The USMARC was authorized by Congress on June 16, 1964, and development began in the spring of 1966 on 35,000 acres near Clay Center, Nebraska. Presently, research programs are using a female breeding population of 6,500 cattle of 18 breeds, 4,000 sheep of 10 breeds, and 700 swine litters per year. The USMARC is administered by the Agricultural Research Service (ARS) within the United States Department of Agriculture (USDA). On October 10, 1978, President Carter signed into law a bill which renamed the research facility after former Senator Roman L. Hruska of Nebraska.

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2001

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Germplasm Evaluation Program- Progress Report No. 20, Larry V. Cundiff, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, R.M. Thallman, Keith Gregory, and L. Dale Van Vleck

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Improved antimicrobial activity of nisin-incorporated polymer films by formulation change and addition of food grade chelator, C. N. Cutter, J. L. Willett, and G. R. Siragusa

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A porcine BAC library with tenfold genome coverage: a resource for physical and genetic map integration, Scott C. Fahrenkrug, Gary A. Rohrer, Brad A. Freking, Timothy P. L. Smith, Kazutoyo Oswoegawa, Chung Li Shu, Joseph J. Catanese, and Pieter J. de Jong

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Use of Heart Girth to Predict Body Weight of Working Oxen in the Ethiopian Highlands, M. R. Goe, J. R. Alldredge, and D. Light

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A rapid twofold dilution method for microbial enumeration and resuscitation of uninjured and sublethally injured bacteria, D H. Kang and G R. Siragusa

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A Rapid Twofold Dilution Method for Microbial Enumeration and Resuscitation of Uninjured and Sublethally Injured Bacteria, D. H. Kang and G. R. Siragusa

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Characterization of Uterine Epidermal Growth Factor During Early Pregnancy in Pigs, J. G. Kim, J. L. Vallet, and R. K. Christenson

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The Role of Cholecystokinin in the Expression of Seasonal Variation in the Feed Intake and Eating Pattern of Red Deer (Cervus elaphus), S. M. Rhind, S. R. McMillen, J. C. Pekas, and E. Duff

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Structure of the Genes for Porcine Endometrial Secreted and Membrane Folate Binding Proteins, J. L. Vallet, T. P. L. Smith, T. S. Sonstegard, M. Heaton, and S. C. Fahrenkrug

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Effect of Extraction Buffer on Estimating Calpain and Calpastatin Activity in Postmortem Ovine Muscle, E. Veiseth and M. Koohmaraie

2000

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Mutations in the genome of porcine reproductive and respiratory syndrome virus responsible for the attenuation phenotype, R. Allende, G. F. Kutish, W. Laegreid, Z. Lu, T. L. Lewis, D. L. Rock, J. Friesen, J. A. Galeota, A. R. Doster, and F. A. Osorio

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Development and Demonstration of RNA Isolation and RT−PCR Procedures to Detect Escherichia coli O157:H7 Gene Expression on Beef Carcass Surfaces, E. D. Berry

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Germplasm Evaluation Program Progress Report No. 19, Larry V. Cundiff, Keith Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Luteinizing Hormone Secretion as Affected by Hypophyseal Stalk Transection and Estradiol-17β in Ovariectomized Gilts, J. J. Ford, J. G. Berardinelli, R. K. Christenson, and L. L. Anderson

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Dehydrogenase and Oxoreductase Activities of Porcine Placental 11β-Hydroxysteroid Dehydrogenase, Harold G. Klemcke

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Identification and Characterization of a New Allele for the Beta Subunit of Follicle-Stimulating Hormone in Chinese Pig Breeds, M. D. Li, G. A. Rohrer, T. H. Wise, and J. J. Ford

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Porcine IgA allotypes are not equally transcribed or expressed in heterozygous swine, P. Navarro, R.K. Christensen, P. Weber, M. Rothschild, G. Ekhardt, and J.E. Butler

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Porcine Erythropoietin Receptor: Molecular Cloning and Expression in Embryonic and Fetal Liver, P. L. Pearson, T. P. L. Smith, T. S. Sonstegard, H. G. Klemcke, R. K. Christenson, and J. L. Vallet

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Monitoring the microbial contamination of beef carcass tissue with a rapid chromogenic Limulus amoebocyte lysate endpoint assay, G. R. Siragusa, D. H. Kang, and C. N. Cutter

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Mapping of Seven Bovine Cytokine Genes Involved in T-lymphocyte Growth, Differentiation and Immune Response, T. S. Sonstegard, W. M. Garrett, G. L. Bennett, S. M. Kappes, D. S. Zarlenga, and L. C. Gasbarre

1999

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INTEGRATION OF HYDROXYAPATITE CONCENTRATION OF BACTERIA AND SEMINESTED PCR TO ENHANCE DETECTION OF SALMONELLA TYPHIMURIUM FROM GROUND BEEF AND BOVINE CARCASS SPONGE SAMPLES, Elaine D. Berry and Gregory R. Siragusa

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Germplasm Evaluation Program- Progress Report No. 18, Larry V. Cundiff, Keith Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Single nucleotide polymorphism (SNP) discovery and linkage mapping of bovine cytokine genes, William M. Grosse, Steven M. Kappes, William W. Laegreid, John W. Keele, Carol G. Chitko-McKown, and Michael P. Heaton

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A Single Nucleotide Polymorphism in the Bovine Kit Oncogene (Hardy−Zuckerman 4 Feline Sarcoma Viral (v-kit) Oncogene Homolog), M. D. Grosz and R. T. Stone

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Hydrogen-Deuterium Exchange and Ultraviolet Resonance Raman Spectroscopy of Bacteria in a Complex Food Matrix, Gregory P. Harhay and Gregory R. Siragusa

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STATISTICAL VALIDATION OF THE TRACK-DILUTION PLATING METHOD FROM GROUND BEEF AND CARCASS SURFACE SAMPLES, Gregory R. Siragusa

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Mapping of the SDHA Locus to Bovine Chromosome 20, T. S. Sonstegard and S. M. Kappes

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Mapping of the ucp1 locus to bovine chromosome 17, T. S. Sonstegard and S. M. Kappes

1998

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Microsatellite Evolution: Testing the Ascertainment Bias Hypothesis, Allan M. Crawford, Steven M. Kappes, Korena A. Paterson, Mauricio J. deGotari, Ken G. Dodds, Brad A. Freking, Roger T. Stone, and Craig W. Beattie

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Germplasm Evaluation Program- Progress Report No. 17, Larry V. Cundiff, Keith Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Incorporation of nisin into a meat binding system to inhibit bacteria on beef surfaces, C. N. Cutter and G. R. Siragusa

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A second-generation linkage map of the sheep genome, Maurico J. deGortari, Brad A. Freking, Rachel P. Cuthbertson, Steven M. Kappes, John W. Keele, Roger T. Stone, Kreg A. Leymaster, Ken G. Dodds, Allan M. Crawford, and Craig W. Beattie

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Comparative gene mapping: cytogenetic localization of PROC, EN1, ALPI, TNP1, and IL1B in cattle and sheep reveals a conserved rearrangement relative to the human genome, N. L. Lòpez-Corrales, T. S. Sonstegard, and T. P. L. Smith

1997

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Germplasm Evaluation Program- Progress ReportNo. 16, Larry V. Cundiff, Keith Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Mapping of microsatellite markers developed from a flow-sorted swine Chromosome 6 library, D. R. Grimm, T. Goldman, R. Holley-Shanks, L. Buoen, J. Mendiola, L. B. Schook, C. Louis, G. A. Rohrer, and J. K. Lunney

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Calculation Of Fractal Dimension From Cattle Thermoregulatory Responses, R. L. KORTHALS, Y. R. CHEN, G. L. HAHN, and R. A. EIGENBERG

1996

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Report of the First Workshop on the Genetic Map of Bovine Chromosome 23, J. E. Beever, H. A. Lewin, W. Barendse, L. Andersson, S. M. Armitage, C. W. Beattie, B. M. Burns, S. K. Davis, S. M. Kappes, B. W. Kirkpatrick, R. Z. Ma, R. A. McGraw, R. T. Stone, and J. F. Taylor

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A Search for Quantitative Trait Loci for Ovulation Rate in Cattle, A. N. Blattman, B. W. Kirkpatrick, and K. E. Gregory

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Germplasm Evaluation Program- Progress Report No. 15, Larry V. Cundiff, Keith E. Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Reduction of Brochothrix thermosphacta on beef surfaces following immobilization of nisin in calcium alginate gels, C. N. Cutter and G. R. Siragusa

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Effectiveness of a steam-vacuum sanitizer for reducing Escherichia coli 0157:H7 inoculated to beef carcass surface tissue, W. J. Dorsa, C. N. Cutter, and G. R. Siragusa

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Evaluation of six sampling methods for recovery of bacteria from beef carcass surfaces, W. J. Dorsa, C. N. Cutter, and G. R. Siragusa

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Use of the polymerase chain reaction for Salmonella detection, J. Kwang, E. T. Littledike, and J. E. King

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Use of a Newly Developed Rapid Microbial ATP Bioluminescence Assay to Detect Microbial Contamination on Poultry Carcasses, G. R. Siragusa, W. J. Dorsa, C. N. Cutter, L. J. Perino, and M. Koohmaraie

1995

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Germplasm Evaluation Program- Progress Report No. 14, Roman L. Hruska U.S. Meat Animal Research Center

1994

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Germ Plasm Evaluation Program- Progress Report No. 13, Larry V. Cundiff, Keith E. Gregory, T. L. Wheeler, Steven D. Shackelford, M. Koohmaraie, Harvey C. Freetly, and D.D. Lunstra

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Heterogeneity of Gonadotropins and Levels of Uncombined Luteinizing Hormone Subunits in Pituitaries of Cryptorchid Rams, B. A. Keel, D. D. Zalesky, I. Sohaili, B. D. Schancacher, and H. E. Grotjan

1993

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Beef Research Program Progress Report (1993) No. 4 (Part 1): Table of Contents

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Bovine Embryos from Bluetongue Infected Donors did not Transmit Virus to Susceptible Recipients, John A. Acree, Sherrill E. Echternkamp, Steve M. Kappes, Gary S. Ross, Albert J. Luedke, and James E. Pearson

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Is Fiber Digestion in the Rumen Reduced by Catabolite Repression?, Kevin L. Anderson and Vincent H. Varel

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Gene Mapping in Cattle, Craig W. Beattie, Roger T. Stone, Michael D. Bishop, Sara L. F. Sunden, John W. Keele, and Steven M. Kappes

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Comparisons of Bos indicus and Bos taurus Inheritance for Carcass Beef Characteristics and Meat Palatability, John D. Crouse, Larry V. Cundiff, Robert M. Koch, Mohammad Koohmaraie, and Steve C. Seideman

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Cycle V of the Germplasm Evaluation (GPE) Program in Beef Cattle, Larry V. Cundiff, Keith E. Gregory, and Robert M. Koch

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Characteristics of Diverse Breeds in Cycle IV of the Cattle Germplasm Evaluation Program, Larry V. Cundiff, R. M. Koch, Keith E. Gregory, John D. Crouse, and Michael E. Dikeman

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Genotype-environment Interactions for Reproduction and Maternal Performance of Bos indicus and Bos taurus Crosses in Nebraska and Florida, Larry V. Cundiff, Timothy A. Olsen, K. Euclides Filho, M. Kroger, W. T. Butts, and Keith E. Gregory

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Improving the Microbiological Quality of Meat, James S. Dickson and Gregory R. Siragusa

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Predicting the Growth of Salmonellae on Beef, James S. Dickson, Gregory R. Siragusa, and James E. Wray Jr.

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Can Cattle Be Litter Bearing? Uterine Capacity in Cattle., Sherrill E. Echternkamp

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Identification of Twin Pregnancies in Cattle by Ultrasonography, Sherrill E. Echternkamp and Keith E. Gregory

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Hormone Profiles in Cattle Selected for Twin Ovulations and Births, Sherrill E. Echternkamp, Leon J. Spicer, and Keith E. Gregory

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Factors Influencing Fetal Growth and Birth Weight in Cattle, Calvin L. Ferrell

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Follicular Hormonal Changes and Oocyte Quality in Heifers That Exhibited an LH Surge, no LH Surge, or in Which the LH Surge Was Suppressed With Progestin, Calvin L. Ferrell and Thomas G. Jenkins

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Energy Expenditures of Mature Cows During the Production Cycle, Calvin L. Ferrell and Tom G. Jenkins

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Biological Efficiency Differences Among Bos taurus x Bos taurus and Bos indicus x Bos taurus F1-Cross Cows, Ronnie D. Green, Larry V. Cundiff, Gordon E. Dickerson, and Thomas G. Jenkins

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Estimates of Genetic and Phenotypic Parameters of Pelvic Measures, Weight, Height, Calf Birth Weight, and Dystocia in Beef Cattle, Keith E. Gregory, Larry V. Cundiff, and Robert M. Koch

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Use of Crossbreeding and Breed Differences to Meet Specific Targets for Production and Carcass Traits of Beef Cattle, Keith E. Gregory, Larry V. Cundiff, and Robert M. Koch

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Differences Among Parental Breeds in Germplasm UtilizationProject, Keith E. Gregory, Larry V. Cundiff, Robert M. Koch, and Donald D. Lunstra

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Germplasm Utilization in Beef Cattle, Keith E. Gregory, Larry V. Cundiff, Robert M. Koch, and Donald D. Lunstra

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Twinning in Cattle, Keith E. Gregory, Sherrill E. Echternkamp, L. Dale Van Vleck, and Larry V. Cundiff

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Contributions of Ovum Cytoplasm and Uterine Environment and Postnatal Environment to Maternal Effects in Beef Cattle, Keith E. Gregory and Ralph R. Maurer

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Characterizing Stress in Feeder Cattle, G. LeRoy Hahn and John A. Nienaber

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Beef Facilities and Management at MARC, W. Gordon Hays and Gary S. Ross

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Mortality and Cold Tolerance of Calves with Different Ratios of Bos indicus to Bos taurus Inheritance, Maurie J. Josey, Larry V. Cundiff, Robert M. Koch, Keith E. Gregory, and G. LeRoy Hahn

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Feedlot and Carcass Characteristics of Heifers: Effect of Ovariectomy and Ovariectomy with Ovarian Autograft, John M. Klindt and John D. Crouse

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Effect of Marbling on Variation and Change in Beef Tenderness In Bos Taurus and Bos Indicus Crosses, Robert M. Koch, John D. Crouse, Michael E. Dikeman, Larry V. Cundiff, and Keith E. Gregory

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Acceleration of Postmortem Tenderization In Brahman-Cross Beef Carcasses by Calcium Chloride, Mohammad Koohmaraie, Georgianna Whipple, and John D. Crouse

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Omasal and Duodenal Nutrient Flow in Steers., Kelly K. Kreikemeier, Gary P. Rupp, and Louis J. Perino

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Roman L. Hruska U.S. Meat Animal Research Center (1993): Overview, D. B. Laster

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Scrotal Thermography as a Tool for Predicting Semen Quality and Natural-Mating Fertility in Young Beef Bulls, Donald D. Lunstra and Glenn H. Coulter

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Puberty Occurs at the Same Testis Size in Both Bos taurus and Bos indicus Crossbred Beef Bulls, Donald D. Lunstra, John D. Crouse, and Larry V. Cundiff

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Immunization Against Inhibin Increases Sperm Production in Young Beef Bulls, Donald D. Lunstra, Terry L. Martin, Gary L. Williams, and James J. Ireland

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Heat and Moisture Production and Dissipation in Beef Cattle, John A. Nienaber, G. LeRoy Hahn, and Anders Ehrlemark

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Superovulation of Cows by Initiating FSH Treatments During the First Few Days After Estrus, Andrew J. Roberts and Sherrill E. Echternkamp

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Factors Involved in Regulating the Development of Ovarian Follicles in Cattle, Andrew J. Roberts, Sherrill E. Echternkamp, Judith M. Grizzle, and Thomas H. Wise

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The Relationship of Metabolic Hormones, Nutrition, and Postpartum Anestrus In Different Biological Types of Cattle, Andrew J. Roberts, Russell A. Nugent III, Thomas G. Jenkins, and John M. Klindt

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Use of Calcium Alginate to Immobilize Antimicrobial Agents on Beef Tissue, Gregory R. Siragusa and James S. Dickson

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Genes of the Major Histocompatibility Complex in Cattle, Roger T. Stone and Noelle E. Muggli-Cockett

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Fiber Degrading Microorganisms from Bison, Cattle-Bison Hybrids and Cattle., Vincent H. Varel and Burk A. Dehority

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Effect of Marbling Degree on Palatability and Caloric Content of Beef, Tommy L. Wheeler, Larry V. Cundiff, and Robert M. Koch

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Effects of a β-Agonist on Muscle Protein Degradation, Enzyme Activity, and Meat Tenderness in Steers, Tommy L. Wheeler and Mohammad Koohmaraie

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A Calcium Chloride Injection Process to Produce Guaranteed Tender and Calcium Fortified Meat, Tommy L. Wheeler, Mohammad Koohmaraie, and John D. Crouse

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Effect of Castration on Skeletal Muscle Protein Turnover and Muscle Enzyme Activities in Cattle, Tommy L. Wheeler, J. Brad Morgan, Mohammad Koohmaraie, John D. Crouse, and Jeff W. Savell

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Meat Tenderness and the Calpain Enzyme System in Young Bulls and Steers, Tommy L. Wheeler, J. Brad Morgan, Mohammad Koohmaraie, Jeff W. Savell, and John D. Crouse

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The Effectiveness of Subjecting Bos indicus Crossbred Beef Carcasses to Higher Temperatures to Improve Tenderness, Georgianna Whipple, Mohammad Koohmaraie, Michael E. Dikeman, and John D. Crouse

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Bos indicus Breeding Effects on Muscle Characteristics and Their Relationship With Meat Tenderness, Georgianna Whipple, Mohammad Koohmaraie, Michael E. Dikeman, John D. Crouse, and Melvin C. Hunt

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Relationships of Thymic Peptides Thymosin α1 and β4 With Reproductive Status: Puberty and Estrus, Thomas H. Wise, Michael L. Day, James E. Kinder, and Ralph R. Maurer

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Effect of Method of Estrous Synchronization on Oocyte Quality and Follicular Insulin- Like Growth Factor (IGF-I), Thomas H. Wise and Ralph R. Murer

1990

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Germ Plasm Evaluation Program- Progress Report No. 12, Larry V. Cundiff, Robert M. Koch, Keith E. Gregory, John D. Crouse, and Michael E. Dikeman

1988

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Beef Research Program Progress Report No. 3 (1988): Table of Contents

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Changes in Testicular Morphology in Boars Actively Immunized Against Gonadotropin Hormone-Releasing Hormone, Caleb A. Awoniyi, Varadaraj Chandrashekar, Robert D. Arthur, Bruce S. Schanbacher, and Richard E. Falvo