Polyphenol oxidases (PPO) are enzymes that catalyze the browning of fruits and vegetables when oxygen in the air reacts with the present phenolic compounds. This study demonstrates the enzymatic browning of food samples and the inhibition of its activity by common household materials. Fr...
The chlorogenic acid content and the polyphenol oxidase activity o. 354%;冻干品多酚氧化酶活性最高,炒制品次之,烫制品、蒸制品基本无活性。 更多例句>> 4) PPO activity 多酚氧化酶活性 1. The flour whiteness, the flour yellowness, protein content, ash content, the Granular size, extraction rate...
A temperature of 35 °C and 5.0 pH were used as the most adequate conditions for polyphenol oxidase activity determination when 4-methyl catechol was used as a substrate. Enzyme activity change was determined in the central and edge region of fruit. The central part of the banana slice showed...
The Pdots@AMP-Cu exhibited obvious red fluorescence emission (668nm), as well as polyphenol oxidase activity by catalyzing the substrate 2,4-DP and 4-AP, and resulted in obvious changes of the solution color from colorless to red. A novel detection method for DA was then developed based on...
Polyphenol oxidases exhibit proteolytic activity In this study, the proteolytic activity was first discovered using a commercial tyrosinase preparation from Agaricus bisporus (AbT) (Fig. 1c), initially intended for the purpose of enzyme immobilization on carriers. Although tyrosinase from A. bisporus is...
Polyphenol oxidase (PPO) has been shown to reduce major peanut allergens. Since high pressure (HP) can increase enzyme activity, we postulated that further reduction of peanut allergens can be achieved through HP combined with PPO. Peanut extracts containing caffeic acid were treated with each of ...
A strong negative correlation between PPO activity and number of panicles, and PPO activity and malformation incidence, suggests that the PPO activity is inversely related to both flowering and malformation incidence in mango. 展开 关键词: buds catechol oxidase cultivars enzyme activity enzymes ...
The PPO reaction was strongly inhibited by tropolone, a Cu competitor, and restored by the addition of Cu2+. Several factors affecting variability in leaf PPO activity levels in plants are discussed. 展开 关键词: apples catechol oxidase enzyme activity genetically engineered organisms leaves proteins...
transgenic plants, Saccharum, messenger RNA, color, catechol oxidase, sugarcane juice, enzyme activity, raw sugar, antisense DNA, cane sugar, gene overexpression, food processing qualityColor intensity of raw sugar is, in part, a result of the activity of the enzyme polyphenol oxidase (PPO) ...
Araji S, Grammer TA, Gertzen R, Anderson SD, Mikulic-Petkovsek M, Veberic R, Phul ML, Solar A, Leslie CA, Dandekar AM, Escobar MA (2014) Novel roles for the polyphenol oxidase enzyme in secondary metabolism and the regulation of cell death in walnut. Plant Physiol 164:1191–1203 ...