نتایج جستجو برای: catechol oxidase
تعداد نتایج: 54988 فیلتر نتایج به سال:
The activities of polyphenol oxidase (PPO) and peroxidase (POD) in hot pepper (Capsicum annuum L.) pericarp were evaluated using spectrophotometric method. The enzymes were extracted from the pepper pericarp 5 g with 20 mL of 0.1 M phosphate buffer solution pH 7. PPO and POD activities were determined using catechol and guaiacol as a substrate, respectively. The effects of the amounts of enzyme...
Abstract Phenolics are vital for the adaptation of plants to terrestrial habitats and species diversity. Phenoloxidases (catechol oxidases, COs, laccases, LACs) responsible oxidation polymerization phenolics. However, their origin, evolution, differential roles during plant development land colonization unclear. We performed phylogeny, domain, amino acids, compositional biases, intron analyses ...
background pyrocatechol or 1, 2-dihydroxybenzene, or 2-hydroxyphenol is considered as apriority pollutant since it is harmful to organisms at low concentrations, and has been classified as hazardous pollutants. objectives the objective of this study was to examine whether azolla filiculoides, is able to remove pyrocatechol from aqueous solutions. materials and methods this study is an experimen...
in this study, the electrochemical mechanism of catechol in presence and absence of nitrite ion, is investigated in phosphate buffer medium (ph=7) using platinum electrode through cyclic voltammetry method in various scan rates. electrochemical oxidation of catechol showed how quinone has changed to o-benzoquinone and also how o-benzoquinone has reacted with nitrite ion and potential scan rate ...
Abstract Oxygen is a major factor of seed germination since it allows resumption respiration and subsequent metabolism reactivation during imbibition, thus leading to the production reducing power ATP. Most studies carried out in 60s 85s indicate that oxygen requirement depends on species modulated by environmental factors. They have also demonstrated covering structures mainly inhibit limiting...
Catechol, 1,2-dihydroxybenzene, prepared through bacterial biotransformation from higher order polyphenols, has been proposed to regulate carbohydrate metabolism, especially in the context of type 2 diabetes. This review aims contextualize this finding. It describes biosynthesis catechol both glucose, and as a degradation product natural products transformation. The then considers mechanism act...
a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...
The formation of 4-deoxyaurones, which serve as UV nectar guides in Bidens ferulifolia (Jacq.) DC., was established by combination of UV photography, mass spectrometry, and biochemical assays and the key step in aurone formation was studied. The yellow flowering ornamental plant accumulates deoxy type anthochlor pigments (6'-deoxychalcones and the corresponding 4-deoxyaurones) in the basal part...
Enzymes catalyzing the oxidation of phenols occur widely in plant tissues and have been extensively studied (l-7), but the diversity of their properties and the complexities of the reactions catalyzed have made assays and their interpretations uncertain. In only a few instances have essentially pure enzyme preparations been studied (1, 6, S), and even in these cases the mechanism of oxidation i...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید