Effects of Ractopamine-HCI and Steroidal Implants on Muscle Growth in Finishing Cattle PDF Download

Author: Garrett Lloyd Parsons
Publisher:
ISBN:
Category :
Languages : en
Pages : 164

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Author:
Publisher:
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Category :
Languages : en
Pages :

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Ractopamine is a repartitioning agent that can increase muscle growth and has led to our interest in determining the mechanisms involved in enhancing muscle growth. Therefore, three studies were conducted to determine the impact of ractopamine on growth in cattle. The first experiment evaluated the impact of increasing metabolizable protein supply to finishing heifers fed ractopamine. Three different diets were fed to increase the amount of metabolizable protein reaching the small intestine, and the diets contained urea, solvent soybean meal, or expeller soybean meal as the primary supplemental protein source. From this study it was determined that increasing metabolizable protein supply above that present in typical feedlot diets containing urea and steam-flaked corn is not necessary to improve responsiveness to ractopamine. The second experiment evaluated the effect of feeding ractopamine to growing Holstein steers implanted with trenbolone acetate/estradiol. Half of the steers were implanted 28 days prior to all steers receiving ractopamine for the final 28 days; this model represents an intense implant program. The mode of action of the ractopamine and of steroidal implants was different based on their different effects on serum insulin-like growth factor (IGF)-I and longissimus expression of IGF-I mRNA. Additionally, administering a combination of the two growth promotants, based on nitrogen retention, yields a less than additive response using our model of growing Holstein steers. The third study was conducted to evaluate the differential response to ractopamine of implanted, finishing steers and heifers. Treatments were steer vs. heifer and 0 vs. 200 mg/d ractopamine fed for the final 28 days. This study attempted to address some questions generated from the previous study, which were how serum and local tissue production of IGF-I are affected by ractopamine. Ractopamine had different effects on serum IGF-I between steers and heifers and numerically increased IGF-I mRNA abundance in longissimus and biceps femoris muscles. Additionally, ractopamine impacted protein turnover differently in different muscles and changed myosin heavy chain IIA expression. The effect of ractopamine on IGF-I warrants more research. These experiments aid in our understanding of the mode of action of ractopamine in cattle.

Author: Bailey N. Harsh
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: National Research Council
Publisher: National Academies
ISBN: 0309049970
Category : Technology & Engineering
Languages : en
Pages : 94

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In the past decade, animal scientists have learned that administering recombinantly derived somatotropin (growth hormone) to cows improves milk production and that giving beta-adrenergic agonists to meat animals improves productivity and leanness. In order for these metabolic modifiers to yield benefits, however, sound management of the animals' nutrition is necessary. This volume reports on how these substances work in the animals' metabolism, what effects they might have on nutrient requirements of domestic livestock, and what information should be developed further by investigators. The book explores the current understanding of the biology, structure, mechanisms of action, and treatment effects of somatotropin, beta-adrenergic agonists, and anabolic steroids. A companion volume to the Nutrient Requirements of Domestic Animals series, this authoritative volume will be required reading for animal scientists, researchers, veterinarians, livestock farmers, and faculty and students in university animal veterinary science programs.

Author: Alexander N. Hristov
Publisher: CABI Publishing
ISBN: 9780851990132
Category : Technology & Engineering
Languages : en
Pages : 288

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Interactions between Cattle and the Environment: a General Introduction; Nitrogen Requirements of Cattle; Nitrogen Metabolism in the RUlDen; Factors Affecting the Efficiency of Nitrogen Utilization in the RUlDen; Whole-anilnal Nitrogen Balance in Cattle Phosphorus Metabolism in the RUlDen; Phosphorus Metabolism in Rwninants and Requirements of Cattle; Etfects ofDietary Phosphorus and Nitrogen on Cattle Reproduction; lnproving the EfficielicY cifNutrient Use on Cattle Operations.

Author: Fereidoon Shahidi
Publisher: Springer Science & Business Media
ISBN: 9780306480713
Category : Technology & Engineering
Languages : en
Pages : 368

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Quality is a composite term encompassing many characteristics of foods. These include color, aroma, texture, general nutrition, shelf-life, stability, and possible presence of undesirable constituents. Obviously deterioration of quality may lead to changes in the attributes that characterize the food in its fresh or freshly processed state. In addition, quality enhancement of products may be carried out using appropriate processing techniques. Interaction of different components present with one another could have a profound effect on sensory quality of products. Meanwhile, presence of extraneous matter such as pesticides and debris may also contribute to a compromise in the quality of foods. In addition, processing often brings about changes in many attributes of food including its nutritional value. Thus, examination of process-induced changes in food products is important. In this book, a cursory account of quality attributes of fresh and processed foods is provided. The book is of interest to food scientists, nutritionists and biochemists in academia, government and industry.

Author: Carrick Devine
Publisher: Academic Press
ISBN: 0080924441
Category : Technology & Engineering
Languages : en
Pages : 2714

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The Encyclopedia of Meat Sciences is an impressive and important body of work. Prepared by an international team of experts, this reference work covers all important aspects of meat science from stable to table, including animal breeding, physiology and slaughter, meat preparation, packaging, welfare, and food safety, to name a few. This Encyclopedia further covers important topics such as food microbiology, meat in human nutrition, biotechnological advances in breeding and many more. The Encyclopedia of Meat Sciences is an invaluable resource to practitioners of meat science and students alike. Also available online via ScienceDirect – featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. Foreword written by Rt. Hon. Helen Clark, Prime Minister of New Zealand Over 200 articles covering all aspects of meat science Reading lists at the end of each article provide further information into primary literature Various figures and tables illustrating the text and a color plate section in each volume Appeals to students, academics researchers and professionals working not only in meat science, but also food science, veterinary sciences, agricultural engineering and livestock management Extensive cross-referencing

Author: Yiyang Dong
Publisher: Springer Nature
ISBN: 9813348380
Category : Science
Languages : en
Pages : 470

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This book outlines comprehensively the main medical uses of aptamers, from diagnosis to therapeutics in fourteen chapters. Pioneering topics covered include aptamer pharmaceuticals, aptamers for malign tumors, aptamers for personalized therapeutics and aptamers for point-of-care testing. The book offers an essential guide for medical scientists interested in developing aptamer-based schemes for better theranostics. It is therefore of interest for not only academic researchers, but also practitioners and medical researchers in various fields of medical science, medical research and bio-analytical chemistry.

Author: Jeffrey J. Zimmerman
Publisher: John Wiley & Sons
ISBN: 1119350859
Category : Medical
Languages : en
Pages : 1136

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Provides a fully revised Eleventh Edition of the definitive reference to swine health and disease Diseases of Swine has been the definitive reference on swine health and disease for over 60 years. This new edition has been completely revised to include the latest information, developments, and research in the field. Now with full color images throughout, this comprehensive and authoritative resource has been redesigned for improved consistency and readability, with a reorganized format for more intuitive access to information. Diseases of Swine covers a wide range of essential topics on swine production, health, and management, with contributions from more than 100 of the foremost international experts in the field. This revised edition makes the information easy to find and includes expanded information on welfare and behavior. A key reference for anyone involved in the swine industry, Diseases of Swine, Eleventh Edition: Presents a thorough revision to the gold-standard reference on pig health and disease Features full color images throughout the book Includes information on the most current advances in the field Provides comprehensive information on swine welfare and behavior Offers a reorganized format to make the information more accessible Written for veterinarians, academicians, students, and individuals and agencies responsible for swine health and public health, Diseases of Swine, Eleventh Edition is an essential guide to swine health. "The 11th edition of Diseases of Swine continues to serve as the gold-standard resource for anything and everything related to swine herd health...this edition does an outstanding job of keeping up with the advanced diagnostic technologies and the latest research on new or emerging diseases and syndromes...there is no other informational resource that comes close to providing the depth or quality of information on the topic of swine diseases as does this book"

Author: James R. Gillespie
Publisher: Delmar
ISBN:
Category : Business & Economics
Languages : en
Pages : 680

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"Designed for career and technical high school students who require competency in all phases and types of livestock production, the Ninth Edition of MODERN LIVESTOCK AND POULTRY PRODUCTION has been revised to include the most up-to-date, comprehensive information in the field. With coverage of basic animal science and livestock industry information as well as current issues in animal agriculture, this engaging text covers everything students need to know about livestock and poultry animals for classroom study and beyond. Through updated visual aids, real-world applications, and comprehensive study tools, the Ninth Edition provides students with a solid understand of the anatomy, physiology, nutrition, feeding, and reproduction of multiple livestock and poultry breeds." --Google Books.