Bruce's Sport is a mutant grapevine (Vitis vinifera L.) with green and white variegated fruit derived from the Sultana variety. The white regions of tissue have decreased polyphenol oxidase (PPO) activity resulting in a reduced capacity for browning. Active PPO from Sultana grapes was purified and had an apparent molecular weight of 40,000 on sodium dodecyl sulfate-polyacrylamide gel electropho...

Dibromination of [2.2]paracyclophane (I) led to predominantly pseudo-ortho2 (11) and pseudo-para2 (111) disubstituted compounds, and to lesser amounts of pseudo-meta (IV) and para (V) isomers. Oxidation of these dibromides gave terephthalic acids whose esters were identified by vpc, and whose structures allowed homoannular and transannular bromination to be differentiated. Tetrabromination of I...

portant for consumer acceptance (Moss, 1971; Miskelly, 1984, 1996), while low L* values indicate undesirable Polyphenol oxidase (PPO) causes darkening and discoloration of discoloration or darkening of noodles. wheat (Triticum aestivum L.) foods such as noodles. Consequently, a simple, nondestructive, quantitative assay for determining PPO on There is a need for a simple, quantitative assay for...

Bruce's Sport is a mutant grapevine (Vitis vinifera L.) with green and white variegated fruit derived from the Sultana variety. The white regions of tissue have decreased polyphenol oxidase (PPO) activity resulting in a reduced capacity for browning. Active PPO from Sultana grapes was purified and had an apparent molecular weight of 40,000 on sodium dodecyl sulfate-polyacrylamide gel electropho...

Melanins are a class of natural pigments associated with a wide range of biological functions, including microbial virulence, energy transduction, and protection against solar radiation. Because of their insolubility and structural heterogeneity, solid-state nuclear magnetic resonance (NMR) spectroscopy provides an unprecedented means to define the molecular architecture of these enigmatic pigm...

EPPO BulletinVolume 52, Issue 3 p. 590-601 STANDARD ON SCHEMES FOR THE PRODUCTION OF HEALTHY PLANTS PLANTINGFree Access PM 4/17 (3) Certification scheme for olive trees and rootstocks First published: 20 October 2022 https://doi.org/10.1111/epp.12883AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text full-text accessPlease ...

Conditioning and conservation methods may interact with polyphenols to alter forage crude protein (CP) solubility and degradability. In this study, forages with ~200 g CP kg−1 dry matter were roll conditioned or macerated, conserved as hay or silage, and then analyzed for CP fractions. Shifting from roll conditioning to maceration of polyphenol-free alfalfa (Medicago sativa L.) reduced buffer s...

Pawpaw (Asimina triloba) fruit stored longer than 4 weeks at 4 8C fail to ripen normally and may develop internal discoloration, indicative of chilling injury (CI). To determine if loss of antioxidant protection in the fruit tissue during cold storage could be the cause of these problems, the levels of total, reduced, and oxidized glutathione and ascorbate and the key enzymes glutathione reduct...