Defatted rice bran is a by-product from the solvent-extraction of rice bran. It contains high amounts of phytate and non-starch polysaccharides, which are considered to be two major antinutritional factors that limit the use of rice bran in poultry diets. Two experiments were conducted to evaluate broiler performance and mineral utilization of defatted rice bran diets supplemented with commercial enzyme phytase alone or a combination of phytase and xylanase under two different environmental temperatures. In the first experiment, six replicate groups of day-old chicks were assigned to five dietary treatments comprised of a control corn-soybean meal diet with 25% corn starch and four diets containing two levels of defatted rice bran (10 and 25%) with or without phytase (500 units/kg diet) supplementation. In experiment 2, five replicate groups of chicks were assigned to dietary treatments similar to first experiment, but using both phytase (500 units/kg diet) and xylanase (1000 units/kg diet) instead of phytase alone plus an additional basal corn-soybean meal based diet. Available phosphorus in diets containing phytase was calculated to be 0.1% reduction from the requirement for broilers. On day 21, some birds were slaughtered and tibias harvested for mineral analysis. The remaining birds were transferred to either a thermoneutral temperature chamber (23.9C̊) or a heatstress chamber (23.9-35C̊, diurnal). Digesta retention time was determined on day 35. Birds were slaughtered at seven weeks of age, tibias harvested, and intestines examined. In both experiments, using up to 25% defatted rice bran in diets was not detrimental to broilers. The beneficial effect of high fat level can overcome some problems associated with high phytate phosphorus and non-starch polysaccharide in defatted rice bran. As a result, birds fed 25% defatted rice bran diet had the highest bodyweight gain. Supplementing with enzymes improved feed conversion ratio of 3-week-old chicks fed 10% defatted rice bran diet. No significant differences were found in weight percentage of most parts of the carcass, as well as in morphology of the duodenum and the jejunum examined by villi height and crypt depth measurements. Abdominal fat was increased in birds fed 25% defatted rice bran diets. Tibia phosphorus, zinc and manganese content of chicks fed 10% defatted rice bran diet were improved by supplemental phytase alone, while tibia calcium, phosphorus, and manganese content of chicks were improved when both enzymes were added to 25% defatted rice bran diet. However, only the improvement of tibia phosphorus of 7-week-old birds was detected when phytase was added to 25% defatted rice bran diet or when both enzymes were added to 10% defatted rice bran diet. improve by using phytase alone.
Enzymes in Human and Animal Nutrition is a detailed reference on enzymes covering detailed information on all relevant aspects fundamental for final use of enzymes in human and animal nutrition. Topics explored include selection, engineering and expression of microbial enzymes, effects of probiotics on enzymes in the digestive tract, potential new sources of enzymes, valorization of plant biomass by food and feed enzymes. Economics and intellectual property issues are also examined. Examines the role of enzymes in nutrition and in the production of food and animal feed so that food industry and academic researchers can understand applications of enzymes in the health of humans and animals Begins with a thorough overview of selection, engineering and expression of microbial enzymes Examines extremophile organisms as a potential new source of enzymes Includes discussion of analytics, economics and intellectual property to increase applicability of the rest of the book outside of the lab
This book brings together 19 full length manuscripts from invited speakers and nearly 300 abstracts from oral and poster communications presented at the 21st European Symposium on Poultry Nutrition held in Salou/Vila-seca, Spain in May 2017. The invited papers address aspects of poultry nutrition such as feed intake and thermoregulation, feeding strategies and gastrointestinal health, precision feeding (feeding strategies and nutrient requirements), optimized use of feed ingredients, and other hot topics such as updating P requirements of broilers, mycotoxins and future perspectives of poultry production. The open communication abstracts deal with the latest research on poultry nutrition, including feed raw materials, protein sources and amino acids, feed additives and enzymes, nutrition and gut health, mineral nutrition, among other topics.
From alpha-galactosidases to xylanases, Enzymes in Farm Animal Nutrition, 2nd Edition provides a comprehensive guide to all aspects associated with enzyme supplemented animal feeds. Detailing economic, environmental and technological impacts, this new edition brings the reader up to date with the considerable advances of the last decade, providing a unique insight into the current market. Chapters cover a wide range of topics using a variety of evidence from both in vitro and in vivo studies, providing a better understanding of the complex links between feed enzyme function, digestive physiology and ultimately animal performance. Particular attention is paid to new methods for the evaluation of enzyme responses, including holo-analysis. The authors provide a detailed discussion of the various enzyme classes that have been introduced into the market, exploring current use in the global industry and assessing the likely future trends and practices.
Enzymes in Food Biotechnology: Production, Applications, and Future Prospects presents a comprehensive review of enzyme research and the potential impact of enzymes on the food sector. This valuable reference brings together novel sources and technologies regarding enzymes in food production, food processing, food preservation, food engineering and food biotechnology that are useful for researchers, professionals and students. Discussions include the process of immobilization, thermal and operational stability, increased product specificity and specific activity, enzyme engineering, implementation of high-throughput techniques, screening to relatively unexplored environments, and the development of more efficient enzymes. Explores recent scientific research to innovate novel, global ideas for new foods and enzyme engineering Provides fundamental and advanced information on enzyme research for use in food biotechnology, including microbial, plant and animal enzymes Includes recent cutting-edge research on the pharmaceutical uses of enzymes in the food industry
Issues in General Food Research / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about General Food Research. The editors have built Issues in General Food Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about General Food Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in General Food Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Proceedings of Euro-Mediterranean Conference for Environmental Integration (EMCEI-1), Tunisia 2017
Author: Amjad Kallel
This volume includes the papers presented during the 1st Euro-Mediterranean Conference for Environmental Integration (EMCEI) which was held in Sousse, Tunisia in November 2017. This conference was jointly organized by the editorial office of the Euro-Mediterranean Journal for Environmental Integration in Sfax, Tunisia and Springer (MENA Publishing Program) in Germany. It aimed to give a more concrete expression to the Euro-Mediterranean integration process by supplementing existing North-South programs and agreements with a new multilateral scientific forum that emphasizes in particular the vulnerability and proactive remediation of the Euro-Mediterranean region from an environmental point of view. This volume gives a general and brief overview on current research focusing on emerging environmental issues and challenges and its applications to a variety of problems in the Euro-Mediterranean zone and surrounding regions. It contains over five hundred and eighty carefully refereed short contributions to the conference. Topics covered include (1) innovative approaches and methods for environmental sustainability, (2) environmental risk assessment, bioremediation, ecotoxicology, and environmental safety, (3) water resources assessment, planning, protection, and management, (4) environmental engineering and management, (5) natural resources: characterization, assessment, management, and valorization, (6) intelligent techniques in renewable energy (biomass, wind, waste, solar), (7) sustainable management of marine environment and coastal areas, (8) remote sensing and GIS for geo-environmental investigations, (9) environmental impacts of geo/natural hazards (earthquakes, landslides, volcanic, and marine hazards), and (10) the environmental health science (natural and social impacts on Human health). Presenting a wide range of topics and new results, this edited volume will appeal to anyone working in the subject area, including researchers and students interested to learn more about new advances in environmental research initiatives in view of the ever growing environmental degradation in the Euro-Mediterranean region, which has turned environmental and resource protection into an increasingly important issue hampering sustainable development and social welfare.