Results 51 to 60 of about 7,808 (255)
STUDIES ON POLYPHENOL OXIDASE (PPO) FROM SOME CRUCIFERAE VEGETABLES [PDF]
, 2014 Undesirable browning in damaged tissues of many fruits and vegetables is induced by enzymatic oxidation of polyphenols, catalyzed by polyphenol oxidase (EC 1.10.3.1; o-diphenol: oxygen oxidoreductase, PPO).
Rahman, Andi Nurfaidah
core
Interaction ammonium-nitrate: Response to oxidative stress in chicory plants
, 2010 The aim of this work was to study, as a function of the different availability of nitrogen in the reduced form, mineral and organic, the induction of the synthesis of some ROS-scavenging molecules and the evolution of some enzymatic activities such as ...
Adalgisa Belligno +2 more
core +1 more source
Advanced Science, EarlyView.ABSTRACT Intestinal ischemia/reperfusion (I/R) injury presents a biphasic pathology: an acute oxidative‐inflammatory phase leading to organ failure, and a recovery phase marked by mucosal dysfunction and bacterial translocation. The developed MPB@TA‐Cu‐Ma nanocomposite functions as a dual‐phase therapeutic platform with significant efficacy. It rapidly
Chenghao Qiu +15 more
wiley +1 more source
Studies on polyphenol oxidase in wheat grains [PDF]
, 1973 Polyphenol oxidase was partially purified from the bran fraction of mature grains of tall and dwarf varieties of wheat. The specific activity of the enzyme in dwarfs is distinctly higher than in tall varieties. Furthur, the enzyme in dwarfs is relatively
Tikoo, S. +3 more
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Agricultural and Biological Chemistry, 1966 Polyphenol oxidase in tea leaves was fractionated to three components,called A-I, A-II and B, by the combination of DEAE and CM-cellulose column chromatographies. They exhibited different migration on starch-gel electrophoregram at pH 5.0. The results of CM-cellulose chromatography and starch-gel electrophoresis indicated that A-I and A-II were basic ...
TAKEO, Tadakazu, URITANI, Ikuzo
openaire +2 more sources
Tomato Polyphenol Oxidase (Differential Response of the Polyphenol Oxidase F Promoter to Injuries and Wound Signals) [PDF]
Plant Physiology, 1997 Abstract Tomato (Lycopersicon esculentum Mill.) polyphenol oxidases (PPOs) are encoded by a seven-member gene family that exhibits complex patterns of differential expression during growth and differentiation. Antisense down-regulation of constitutive and induced PPO expression results in hypersusceptibility to pathogens, suggesting a ...
P., Thipyapong, J. C., Steffens
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Advanced Science, EarlyView.The TPR‐LYTACs nanomaterial offers a dual‐pathway strategy for precise gouty arthritis treatment by targeting and degrading the ROS‐producing enzyme NOX2 inside macrophages while its antioxidant core clears accumulated ROS outside. This “source inhibition and microenvironment scavenging” approach, guided by NIR‐II imaging, effectively controls local ...
Jian Zhang +15 more
wiley +1 more source
Biochemical studies on blackspot bruising in potato (solanum tuberosum l.) [PDF]
, 2002 Potatoes respond to mechanical stress by invoking a precisely controlled biochemical reaction leading to production of the pigment melanin. Predisposition to produce melanin is variety specific, this specificity being conveyed by a range of genetic ...
Johnson, Steven
core
Advanced Science, EarlyView.This study uncovers that quercetin naturally targets mitochondria. By coordinating quercetin with Fe3+, we engineer an ultrasmall cascade nanozyme (MCN) with superoxide dismutase‐catalase activities. MCN crosses the damaged blood–brain barrier, scavenges mitochondrial ROS, prevents mitochondrial DNA leakage, and blocks the cGAS‐STING pathway, thereby ...
Wenxuan Zheng +14 more
wiley +1 more source
Recent Advances of Polyphenol Oxidases in Plants
Molecules, 2023 Polyphenol oxidase (PPO) is present in most higher plants, but also in animals and fungi. PPO in plants had been summarized several years ago. However, recent advances in studies of PPO in plants are lacking. This review concludes new researches on PPO distribution, structure, molecular weights, optimal temperature, pH, and substrates.
openaire +3 more sources