Polyphenol Oxidases Ppos In Plants

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Polyphenol Oxidases Ppos In Plants

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Author : Aravind Jukanti
language : en
Publisher: Springer
Release Date : 2017-08-18

Polyphenol Oxidases Ppos In Plants written by Aravind Jukanti and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-18 with Science categories.

This book is first of its kind exclusively dedicated to plant polyphenol oxidases (PPOs), highlighting their importance in the food processing industry. By reviewing the scientific developments of the past several decades, it offers a comprehensive overview of various aspects of plant PPOs, including chemistry, structure, functions, regulation, genetics/genomics and molecular aspects. PPOs are copper-containing proteins found in several plant species that catalyze the hydroxylation of o-monophenols to o-diphenols and oxidation of the o-dihydroxyphenols to o-quinones. Further, the quonines undergo self-polymerization or react with amines/thiol groups to produce brown/dark coloration of products. All the PPOs contain two Cu-binding sites (CuA and CuB) as their central domain, these interact with phenolic substrates and molecular oxygen. Several of the plant PPOs contain an N-terminal transit peptide (~80-100 amino acids ) necessary for plastid import. The PPOs occur in latent form that are activated by various treatments including acid and base shock, exposure to detergents or proteolytic degradation. The pH optimum of PPOs varies widely depending upon different plant species but is usually ~4.0 – 8.0. Similarly, the optimum temperature also varies as per the source and substrate involved ranging from 30 to 45 °C. Multiple PPO isoforms have been reported in several plant species, and the chromosomal location of PPOs has also been studied in some species. The physiological role (s) of PPOs is not entirely understood, but they could be involved in defense-related functions in plants. From an applied perspective, PPOs are implicated in enzymatic browning/darkening of cereal products, vegetables and fruits. Interestingly, browning is preferred in some instances like the processing of black tea, cocoa, and coffee as it enhances their quality by forming flavorful products. There have b een initiatives to specifically breed and develop cultivars with reasonably low PPO levels in the mature grain or fruit. Further, several types of inhibitors that reduce the PPO activity have also been identified. Despite their commercial/economic importance and the availability of literature on different aspects of PPOs in different plant species, this is the first book to provide basic information regarding PPOs. It is a valuable resource for researchers involved in quality-related research specifically in crops, vegetables and fruits. Further, as PPOs are also implicated in defense- or stress-related functions, the book is also useful to breeders, pathologists, molecular biologists, physiologists and entomologists.

Enzymes In Food Technology

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Author : Mohammed Kuddus
language : en
Publisher: Springer
Release Date : 2018-11-19

Enzymes In Food Technology written by Mohammed Kuddus and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-19 with Medical categories.

The integration of enzymes in food processing is well known, and dedicated research is continually being pursued to address the global food crisis. This book provides a broad, up-to-date overview of the enzymes used in food technology. It discusses microbial, plant and animal enzymes in the context of their applications in the food sector; process of immobilization; thermal and operational stability; increased product specificity and specific activity; enzyme engineering; implementation of high-throughput techniques; screening of relatively unexplored environments; and development of more efficient enzymes. Offering a comprehensive reference resource on the most progressive field of food technology, this book is of interest to professionals, scientists and academics in the food and biotech industries.

Enzymatic Browning And Its Prevention

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Author : Chang Y. Lee
language : en
Publisher:
Release Date : 1995

Enzymatic Browning And Its Prevention written by Chang Y. Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Language Arts & Disciplines categories.

Describes the chemistry, structure, and function of polyphenol oxidase. Covers the molecular biology of polyphenol oxidase. Describes the chemistry of enzymatic browning. Provides practical methods for preventing enzymatic browning in fruit and vegetable products. Valuable reading for chemists, molecular biologists, food scientists, and food technologists.

Polyphenol Oxidases

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Author : Pradeep Verma
language : en
Publisher: Walter de Gruyter GmbH & Co KG
Release Date : 2024-04-22

Polyphenol Oxidases written by Pradeep Verma and has been published by Walter de Gruyter GmbH & Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-04-22 with Science categories.

Currently, there are no books that cover all the dimensions of Polyphenol Oxidases (PPOs), which is why publication of the book is needed. The book focuses on its types, structure, distinctive aspects, applications, genetic engineering, and commercial status. PPOs have been used for wastewater remediation and in environmental biosensors. The role of PPOs in global sustainability along with challenges and future prospects is also discussed.

Fresh Cut Fruits And Vegetables

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Author : Olusola Lamikanra
language : en
Publisher: CRC Press
Release Date : 2002-02-14

Fresh Cut Fruits And Vegetables written by Olusola Lamikanra and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-02-14 with Technology & Engineering categories.

A comprehensive reference for the emerging fresh-cut fruits and vegetable industry, Fresh-cut Fruits and Vegetables: Science, Technology and Market focuses on the unique biochemical, physiological, microbiological, and quality changes in fresh-cut processing and storage. It highlights the distinct equipment design, packaging requirements, production economics, and marketing considerations for fresh-cut products. Based on the extensive research in this area during the last 10 years, this reference is the first to cover the complete spectrum of science, technology, and marketing issues related to this field.

Biology Of Microorganisms On Grapes In Must And In Wine

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Author : Helmut König
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-01-15

Biology Of Microorganisms On Grapes In Must And In Wine written by Helmut König and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-01-15 with Science categories.

The ancient beverage wine is the result of the fermentation of grape must. This n- urally and fairly stable product has been and is being used by many human societies as a common or enjoyable beverage, as an important means to improve the quality of drinking water in historical times, as therapeutical agent, and as a religious symbol. During the last centuries, wine has become an object of scientific interest. In this respect different periods may be observed. At first, simple observations were recorded, and subsequently, the chemical basis and the involvement of microorg- isms were elucidated. At a later stage, the scientific work led to the analysis of the many minor and trace compounds in wine, the detection and understanding of the biochemical reactions and processes, the diversity of microorganisms involved, and the range of their various activities. In recent years, the focus shifted to the genetic basis of the microorganisms and the molecular aspects of the cells, including metabolism, membrane transport, and regulation. These different stages of wine research were determined by the scientific methods that were known and available at the respective time. The recent “molecular” approach is based on the analysis of the genetic code and has led to significant results that were not even imaginable a few decades ago. This new wealth of information is being presented in the Biology of Microorganisms on Grapes, in Must, and in Wine.

Laccase And Polyphenol Oxidase

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Author : Ivanhoe K.H. Leung
language : en
Publisher: Elsevier
Release Date : 2024-10-30

Laccase And Polyphenol Oxidase written by Ivanhoe K.H. Leung and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-10-30 with Science categories.

Laccase and Polyphenol Oxidase: Biochemistry and Biotechnological Applications, a new volume in the Foundations and Frontiers in Enzymology series, provides a thorough discussion of the laccase and polyphenol oxidase enzyme families, which play a key role in the oxidation of phenolic substrates and an important biological function in many organisms. In recent years, significant advances have been made in understanding these enzymes, but few practical resources exist on their fundamental biology, research methods, and applications. In this book, leading world experts discuss the biochemistry of laccase and polyphenol oxidases, research methods, and uses across industries, offering a practical overview of these important enzyme classes, and empowering researchers to develop their own studies and hone applications. The book deftly connects topics across these intricate enzyme systems, with early chapters on physicochemical properties of PPO and laccase, followed by separate sections on these related enzyme classes' function in biological and industrial systems, production, purification, active assays, and application areas from food and wine to healthcare, bioremediation, and green and computational chemistry. Step-by-step instructions and explanation offer clear guidance in replicating key research and application methodologies discussed. - Examines the fundamental biology of laccase and polyphenol oxidases, research methods, and their uses across industries - Features chapter contributions from leading international experts in the field - Offers step-by-step instructions in key research and application methodologies

The Science Of Cooking

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Author : Joseph J. Provost
language : en
Publisher: John Wiley & Sons
Release Date : 2025-05-12

The Science Of Cooking written by Joseph J. Provost and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-05-12 with Science categories.

PROVIDES A CLEAR AND ACCESSIBLE PATH TO LEARNING KEY SCIENTIFIC CONCEPTS THROUGH THE LENS OF FOOD AND COOKING The Science of Cooking provides an engaging and relatable way to explore the science behind every meal. Designed for both science and non-science majors, this popular textbook breaks down complex, molecular-level processes into easily digestible concepts. More than 30 inquiry-driven activities covering science basics and food-focused topics are supported by a series of experiments that can be conducted in the lab, in the classroom, and at home with minimal equipment. Now in its second edition, The Science of Cooking offers enhanced learning tools throughout, including new end-of-chapter questions, practice problems, and hands-on cooking labs. An entirely new “Science for the Chef” section pairing real-world recipes with scientific explanations is accompanied by new chapters on foundational chemistry and biochemistry that connect theory to practical cooking skills. The Science of Cooking: Is a unique approach to teaching all students core fundamentals of chemistry, biology and biochemistry in a food and cooking context. Provides clear explanations and practical insights to future chefs, dietitians, and scientists alike Includes learning objectives, key concepts and end of chapter questions Contains a new selection of detailed recipes that demonstrate scientific processes Integrates guided-inquiry activities that encourage active learning with structured exercises Features inquiry-based cooking labs that offer experiential learning opportunities to deepen student understanding Includes access to a companion website at http://scienceofcooking.bergbuilds.domains/, for adopting professors with downloadable guided-inquiry activities and laboratories. Connecting classroom learning to real-world cooking, The Science of Cooking: Understanding the Biology and Chemistry Behind Food and Cooking, Second Edition is perfect for undergraduate students in chemistry, biochemistry, biology, food science, and nutrition, as well liberal arts majors taking introductory or general science courses.

The Origin Of Plant Chemodiversity Conceptual And Empirical Insights

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Author : Kazuki Saito
language : en
Publisher: Frontiers Media SA
Release Date : 2020-08-06

The Origin Of Plant Chemodiversity Conceptual And Empirical Insights written by Kazuki Saito and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-06 with categories.

Fruit Manufacturing

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Author : Jorge E. Lozano
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-11-28

Fruit Manufacturing written by Jorge E. Lozano and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-11-28 with Technology & Engineering categories.

Emphasizing the products rather than the processes this is the first book to encompass quality changes during processing and storage of fruit in the food industry. It presents the influence on a fruit product’s quality in relation to the different processing methods, from freezing to high temperature techniques. It also discusses the origin of deterioration, kinetics of negative reactions, and methods for inhibition and control of the same.