Sample Preparation Methods and Pre-harvest Factors Influencing the Contents of Bioactive Compounds and Antioxidant Activity in Peppers PDF Download
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Author: Hae Jin Bae
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Peppers are a rich source of diverse bioactive compounds with potential health-promoting properties. The levels of bioactive compounds and antioxidant activity can be affected by analytical methods, pre-harvest factors, and the quality of peppers. In order to understand the nutrient composition and antioxidant activity in peppers, determination of factors influencing the contents of bioactive compounds is important. The overall objectives were to determine the efficient conditions of sample preparation and the impact of pre-harvest factors affecting bioactive compounds and antioxidant activity. Optimal extraction procedures were developed, and HPLC methods were validated for bioactive compounds in peppers. The highest flavonoids were extracted in ethanol, while myricetin was extracted using N-N-dimethylformamide. Optimized conditions for flavonoids were obtained during 3 h of extraction time and hydrolysis in M HCl for 60 min at 95 degrees C. Capsaicinoids and ascorbic acid were simultaneously separated and extracted using a solvent mixture consisting of 3% metaphosphoric acid: ethanol (2:8) after 30 min of sonication. To determine the relationship between bioactive compounds and antioxidant activities in pepper extracts from different solvent properties, bioactive compounds were analyzed, and the antioxidant activities were assayed by 2,2,-Diphenyl-1-picryl hydrazyl (DPPH), reducing power, and degradation of deoxyribose. Hexane extracts had the highest levels of capsaicinoids and carotenoids, while methanol extracts had the highest levels of flavonoids. Strong DPPH scavenging activity and reducing power were found in lipophilic extracts, while hydrophilic extracts were appropriate for inhibition of deoxyribose degradation. Variation in content of ascorbic acid, capsaicinoids, and flavonoids was evaluated at immature and mature stages of pepper cultivars in different locations over two years. Mature peppers contained the highest levels of capsaicinoids and ascorbic acid. Flavonoids were variable at different maturity stages. Interactions between pre-harvest factors and bioactive compounds were highly significant. This study demonstrated the efficient sample preparation methods and simultaneous separation of bioactive compounds, which reduces analysis time and leads to reduced cost. The antioxidant properties were strongly associated with the concentration of bioactive compounds based on selective pepper extracts. The pepper quality can be improved by using appropriate pre-harvest conditions that increase the levels of bioactive compounds in peppers.
Author: Hae Jin Bae
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Peppers are a rich source of diverse bioactive compounds with potential health-promoting properties. The levels of bioactive compounds and antioxidant activity can be affected by analytical methods, pre-harvest factors, and the quality of peppers. In order to understand the nutrient composition and antioxidant activity in peppers, determination of factors influencing the contents of bioactive compounds is important. The overall objectives were to determine the efficient conditions of sample preparation and the impact of pre-harvest factors affecting bioactive compounds and antioxidant activity. Optimal extraction procedures were developed, and HPLC methods were validated for bioactive compounds in peppers. The highest flavonoids were extracted in ethanol, while myricetin was extracted using N-N-dimethylformamide. Optimized conditions for flavonoids were obtained during 3 h of extraction time and hydrolysis in M HCl for 60 min at 95 degrees C. Capsaicinoids and ascorbic acid were simultaneously separated and extracted using a solvent mixture consisting of 3% metaphosphoric acid: ethanol (2:8) after 30 min of sonication. To determine the relationship between bioactive compounds and antioxidant activities in pepper extracts from different solvent properties, bioactive compounds were analyzed, and the antioxidant activities were assayed by 2,2,-Diphenyl-1-picryl hydrazyl (DPPH), reducing power, and degradation of deoxyribose. Hexane extracts had the highest levels of capsaicinoids and carotenoids, while methanol extracts had the highest levels of flavonoids. Strong DPPH scavenging activity and reducing power were found in lipophilic extracts, while hydrophilic extracts were appropriate for inhibition of deoxyribose degradation. Variation in content of ascorbic acid, capsaicinoids, and flavonoids was evaluated at immature and mature stages of pepper cultivars in different locations over two years. Mature peppers contained the highest levels of capsaicinoids and ascorbic acid. Flavonoids were variable at different maturity stages. Interactions between pre-harvest factors and bioactive compounds were highly significant. This study demonstrated the efficient sample preparation methods and simultaneous separation of bioactive compounds, which reduces analysis time and leads to reduced cost. The antioxidant properties were strongly associated with the concentration of bioactive compounds based on selective pepper extracts. The pepper quality can be improved by using appropriate pre-harvest conditions that increase the levels of bioactive compounds in peppers.
Author: Beatrice Dawson
Publisher: Nova Science Publishers
ISBN: 9781634848398
Category : Peppers
Languages : en
Pages : 0
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Book Description
The pepper fruit is commonly consumed as fresh fruit. In addition, the fruit is used in food industry and in manufacture processing, either fermented or concentrated. The pepper fruit is a rich source of bioactive compounds with antioxidant properties to which highly desirable medicinal properties and health benefits have been attributed. The stability and concentration of these bioactive compounds are affected by preharvest factors such as cultivar, cultivation methods and fertilisation, grafting, shading, stage of maturity, and postharvest factors such as prestorage treatments, temperature management and packaging. Chapter One of this book discusses in detail the preharvest and postharvest factors influencing the functional properties of pepper fruit. Chapter Two reviews electron paramagnetic resonance imaging of paramagnetic species in pepper seeds. Chapter Three studies the technology and properties of drying peppers after harvesting. Chapter Four presents the potential use of peppers for therapeutic management besides its use as a food additive in various spicy cuisines. Chapter Five provides an overview of recent research on the chemical profile, health properties, and processing of peppers.
Author: Daniel Valero
Publisher: CRC Press
ISBN: 143980267X
Category : Medical
Languages : en
Pages : 287
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Book Description
Interest in the postharvest behavior of fruits and vegetables has a history as long as mankind's. Once we moved past mere survival, the goal of postharvest preservation research became learning how to balance consumer satisfaction with quantity and quality while also preserving nutritional quality. A comprehensive overview of new postharvest techno
Author: Mario Alfonso Salazar
Publisher:
ISBN: 9781619420854
Category : Hot peppers
Languages : en
Pages : 0
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Book Description
This book present current research in the study of the nutrition, consumption and health effects of peppers. Topics discussed include the beneficial effects and mechanism of action of pepper capsaicinoids; the effect of different factors on parameters of pepper fruit quality; extraction of bioactive compounds from capsicum oleoresin; the effects of pre-treatment, drying method, and temperature on drying kinetics and quality of peppers; and the consumption of peppers in Brazil and its implications on nutrition and health in humans and animals.
Author: Dave DeWitt
Publisher: Timber Press
ISBN: 0881929204
Category : Gardening
Languages : en
Pages : 337
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Book Description
The Complete Chile Pepper Book, by world-renowned chile experts Dave DeWitt and Paul W. Bosland, shares detailed profiles of the one hundred most popular chile varieties and include information on how to grow and cultivate them successfully, along with tips on planning, garden design, growing in containers, dealing with pests and disease, and breeding and hybridizing. Techniques for processing and preserving include canning, pickling, drying, and smoking. Eighty-five mouth-watering recipes show how to use the characteristic heat of chile peppers in beverages, sauces, appetizers, salads, soups, entrees, and desserts.
Author: Paul W. Bosland
Publisher: CABI
ISBN: 1845938259
Category : Science
Languages : en
Pages : 242
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Book Description
Although thought of as a minor crop, peppers are a major world commodity due to their great versatility. They are used not only as vegetables in their own right but also as flavourings in food products, pharmaceuticals and cosmetics. Aimed at advanced students and growers, this second edition expands upon topics covered in the first, such as the plants history, genetics, production, diseases and pests, and brings the text up to date with current research and understanding of this genus. New material includes an expansion of marker-assisted breeding to cover the different types of markers available, new directions and trends in the industry, the loss of germplasm and access to it, and the long term preservation of Capsicum resources worldwide.
Author: Ashok K. Chauhan
Publisher: Anshan Pub
ISBN: 9781904798972
Category : Microbial ecology
Languages : en
Pages : 0
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Book Description
This book highlights the interrelatedness of microbes with life and environment. It stresses that microbes have a beneficial impact on human life and environment. It covers the various aspects of microbes such as molecular biology, interrelationships, microbial intervention in our environment, microbial biotechnology, genetics, immunology, biochemistry, economic importance, interaction with medicinal plants, human beings, industrial relevance, and influence on our health and so on. It will prove to be an excellent reference source for academics, students, scientists and professionals working in applied microbiology, biotechnology and bioengineering.
Author: Seid Mahdi Jafari
Publisher: Academic Press
ISBN: 0128113642
Category : Technology & Engineering
Languages : en
Pages : 636
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Book Description
Nanoencapsulation Technologies for the Food and Nutraceutical Industries is a compendium which collects, in an easy and compact way, state-of-the-art details on techniques for nanoencapsulation of bioactive compounds in food and nutraceutical industries. The book addresses important modern technologies, including biopolymer based nano-particle formation techniques, formulation based processes, such as nano-liposomes and nano-emulsions, process based nano-encapsulation, such as electro-spinning and nano-spray drying, natural nano-carrier based processes, like casein and starch nano-particles, and other recent advances. This definitive reference manual is ideal for researchers and industry personnel who want to learn more about basic concepts and recent developments in nanotechnology research. Serves as a compendium of recent techniques and systems for nanoencapsulation of bioactive compounds Brings together basic concepts and the potential of nanoencapsulation technologies, also including their novel applications in functional foods and nutraceutical systems Includes biopolymer based nano-particle formation techniques, formulation based processes, process based nanoencapsulation, and nano-carrier based process
Author: Wilfred Vermerris
Publisher: Springer Science & Business Media
ISBN: 1402051646
Category : Science
Languages : en
Pages : 284
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Book Description
These are just a few examples that illustrate the chemical diversity and use of phenolic compounds, the topic of ‘Phenolic Compound Biochemistry’. This book is written for researchers, instructors, advanced undergraduate students and beginning graduate students in the life sciences who wish to become more familiar with these and many other intriguing aspects of phenolic compounds. Topics covered include nomenclature, chemical properties, biosynthesis, including an up-to-date overview of the genetics controlling phenolic metabolism, isolation and characterization of phenolic compounds, phenolics used in plant defense, and the impact of phenolics on human health. The book is written in an accessible style, and assumes only basic knowledge of organic chemistry, biochemistry and cell physiology. More than 300 chemical structures and reaction schemes illustrate the text. Wilfred Vermerris is Associate Professor of Agronomy at the University of Florida Genetics Institute in Gainesville, FL. His research focuses on the genetic control of phenolic compounds that impact agro-industrial processing of crop plants. Ralph Nicholson is Professor of Botany and Plant Pathology at Purdue University in West Lafayette, IN. He is an expert on phenolic compounds involved in the plant’s defense against pathogenic fungi and bacteria.
Author: Delia B. Rodriguez-Amaya
Publisher: John Wiley & Sons
ISBN: 1118733304
Category : Technology & Engineering
Languages : en
Pages : 324
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Book Description
Carotenoids were first studied as natural pigments, then as precursors of vitamin A, and then as bioactive compounds against chronic diseases. These compounds have been and continue to be the subject of intense research worldwide, now with an expanded scope. Food Carotenoids: Chemistry, Biology and Technology gathers all the important information about these major compounds which impact both food quality and human health. It integrates in one volume various aspects of food carotenoids, such as: Structures and physicochemical properties Biosynthetic pathways and metabolism Analysis and composition of foods Stability and reactions during processing Commercial production as food colorants and precursors of aroma compounds Bioavailability and health benefits Having worked with carotenoids in various aspects for 44 years, Delia Rodriguez-Amaya is uniquely placed to pass on her wealth of knowledge in this field. This book will serve as solid background information for professionals in Food Science, Food Technology, Nutrition, Agriculture, Biology, Chemistry and Medical Sciences, whether in the academe, industry, governmental and non-governmental agencies.
