Download or read book GB 5009 296 2023 Translated English of Chinese Standard GB 5009 296 2023 GB5009 296 2023 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-01-30 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies methods for the determination of vitamin D in foods. Method I ¨C Normal phase chromatography purification - reversed-phase liquid chromatography applies to the determination of vitamin D2 and vitamin D3 in foods containing ergocalciferol or cholecalciferol. Method II ¨C Online column switching - reversed-phase liquid chromatography applies to the determination of vitamin D2 and vitamin D3 in foods. Method III ¨C Liquid chromatography - tandem mass spectrometry applies to the determination of vitamin D2 and vitamin D3 in foods. Method I ¨C Normal phase chromatography purification ¨C reversed-phase liquid chromatography.
Download or read book The Kjeldahl Method for Organic Nitrogen written by R. B. Bradstreet and published by Elsevier. This book was released on 2013-10-22 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kjeldahl Method for Organic Nitrogen volume presents a broad and comprehensive survey of the method as applied to natural products and organic nitrogen compounds. The quantitative determination of an element as widely distributed as nitrogen is of great importance, and the truth of this is borne out by the tremendous amount of literature published throughout the years. The analysis of nitrogen can be divided into two classes: inorganic and organic. This book is concerned only with organic nitrogen compounds, and specifically their determination by the Kjeldahl method. The book opens with a chapter on the historical background and the work leading to the evolution of the method. This is followed by separate chapters that discuss each of the several divisions of the method, e.g., salt addition, reduction, oxidation, catalysts, distillation.
Download or read book Beneficial Microorganisms in Agriculture Food and the Environment written by Ingvar Sundh and published by CABI. This book was released on 2012 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microorganisms are widely used in various beneficial applications, including food, pest control, bioremediation, biodegradation, biofuel processes, and plant symbiosis and growth stimulation. This book provides an overview of the available methodology for safety assessments of microorganisms, including determination of their infectivity and whether they produce toxic or sensitizing substances. Also covered are the regulatory systems in risk assessment and management of microbial products, quarantine legislations, international treaties, the importance of public risk perception and risk reducti
Download or read book Manual of Microbiological Methods for the Food and Drinks Industry written by Chris Baylis and published by . This book was released on 2003-01-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enzymes written by Selim Kermasha and published by Academic Press. This book was released on 2020-11-27 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enzymes: Novel Biotechnological Approaches for the Food Industry provides an in-depth background of the most up-to-date scientific research and information related to food biotechnology and offers a wide spectrum of biological applications. This book addresses novel biotechnological approaches for the use of enzymes in the food industry to help readers understand the potential uses of biological applications to advance research. This is an essential resource to researchers and both undergraduate and graduate students in the biotechnological industries. Provides fundamental and rigorous scientific information on enzymes Illustrates enzymes as tools to achieve value and quality to a product, either in vitro or in vivo Presents the most updated knowledge in the area of food biotechnology Demonstrates novel horizons and potential for the use of enzymes in industrial applications
Download or read book Recent research developments in food biotechnology written by Raffaele Porta and published by . This book was released on 2008-01-01 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enzymes are highly efficient and naturally occurring catalysts allowing all the biochemical reactions and processes of life to happen. They are present in all food raw materials from both animal and plant origin. Due to the role played by numerous microorganisms in the production of foods and beverages, enzymes have been extensively and unwittingly used in the past centuries. In fact, for many thousands of years man has used naturally occurring microorganisms bacteria, yeasts and moulds and the enzymes they produce to make foods like bread and cheese, or drinks such as beer and wine. The Egyptians and Sumerians (2000 B.C.) developed fermentation for use in brewing and both bread- and cheese-making. Essential in the metabolism of all living organisms, the enzymes can also be used to drive chemical reactions outside their natural localization. When purified and added to food preparations, several enzymes are able to improve their flavor, texture, nutritional value and digestibility. In fact, enzyme efficiency, specificity and environmental friendliness led to their increased use in food processing. Food industry is constantly seeking advanced technologies to meet consumer demand and the enzymes are a useful biotechnological tool whose action can be controlled in the food matrix to prepare high quality products. Moreover, the enzymes facilitate chemical reactions otherwise impossible or requiring conditions that could damage or destroy the end product or which would need a too much high input of energy. Examples are the production of clear apple juice concentrates, which relies on the use of the enzyme pectinase, and the breakdown of starch to sugars. The latter process, originally carried out by boiling the starch with acid and, thus, requiring large energy inputs, takes place in the presence of enzymes in mild conditions, saving energy and preventing pollution of undesirable by-products. However, it was not until the mid of the past century that the rapid development in enzyme technology occurred, and only in the last 30 years the use of commercial enzymes has grown in the food industry, progressively becoming an important aspect of the manufacturing of particular foods, such as meat, vegetables, fruit, baked goods, milk products, and both alcoholic and non-alcoholic beverages. Currently used food enzymes sometimes originate in animals and plants but most come from a range of beneficial microorganisms. Thus, numerous purified enzymes are now being widely used not only in food processing but also as food additives. In this respect, it is noteworthy that the enzymes, like all proteins, can cause reactions only when people have been sensitized through exposure to large quantities. Therefore, since their levels in the food are generally very low, the enzymes are highly unlikely to cause allergies. Finally, the recent advent of biotechnology has also allowed significant refinements in the methodologies offering unpredictable solutions to many persistent problems and opening up exciting new possibilities. Among these, enzymes are proposed as exemplary agents of green technology since they can also be used either to treat biological wastes or to prevent their formation. However, even though the first food application of a product of gene technology (alpha-amylase) took place in 1982, progress in this field is being slowed down because the debate on some other more controversial applications of genetic engineering in animals is continuing throughout Europe. This book highlights the rapidly expanding field of enzyme applications in food technology, explaining how the biocatalysts bring advantages in some food processing improvement and innovation. The properties of different enzymes are linked to the physical and biochemical events that they influence and are related to the key nutritional, organoleptic and shelf-life qualities of food. In this context, the chapters explore also recent developments in the use of some enzymes as well as the discovery of applications of new enzymes.
