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phenolase

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Phenolase | enzyme - Britannica
Enzymes called phenolases catalyze the oxidation of certain molecules (eg, the amino acid tyrosine) when fruits and vegetables, such as apples, bananas, and ... www.britannica.com
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Phenolase - ScienceDirect.com
Phenolase catalyzes two different reactions: (1) the oxidation of the o-dihydroxyphenols in o-quinones and (2) the hydroxylation of monohydroxyphenols in o- ... www.sciencedirect.com
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Fruit and vegetables: enzymic browning - IFST
The phenolase changes the phenols into melanin, which has a brown colour. To stop the oxidative reaction, the phenolase enzymes need to be denatured. This ... www.ifst.org
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phenolase
phenolase Biol. (ˈfiːnəleɪz, -s) [a. G. phenolase (F. Czapek 1906, in Jahrb. f. wissensch. Bot. XLIII. 380), f. phenol phenol: see -ase.] Any of a class of copper-containing enzymes found esp. in plants, which oxidize phenols to quinones; = phenol oxidase s.v. phenol c.1911 Jrnl. Chem. Soc. C. i. 82... Oxford English Dictionary
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Polyphenol oxidase - Wikipedia
The enzyme works by catalyzing the o-hydroxylation of monophenol molecules in which the benzene ring contains a single hydroxyl substituent to o-diphenols ( ... en.wikipedia.org
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Enzymatic Browning in Fruits & Vegetables - FoodTech Pathshala
The various enzymes that catalyze oxidations of phenols are commonly known as phenolases are polyphenol oxidase (PPO), tyrosinases, or catecholases. Phenolase ... foodtechpathshala.com
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tyrosinase
tyrosinase Biochem. (ˈtaɪərəs-, taɪˈrɒsɪneɪz) [a. F. tyrosinase (G. Bertrand 1896, in Compt. Rend. CXXII. 1216): see tyrosine and -ase.] A copper-containing oxygenase found in many plants and animals which catalyses the formation of quinones from phenols and polyphenols (e.g. melanin from tyrosine) ... Oxford English Dictionary
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Ward's World Activity Guides - Why Do Apple Slices Turn Brown?
The phenolase changes the phenols into melanin, which has a brown color. Melanin is also the pigment that gives human hair, skin, and eyes their color. To ... wardsworld.wardsci.com
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Kinetic evaluation of phenolase activity of tyrosinase using simplified ...
A very simple tyrosinase reaction system has been developed using borate anion as a trapping agent of catechols and hydroxylamine as an external reductant ... pubmed.ncbi.nlm.nih.gov
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Monophenol Monooxygenase - an overview | ScienceDirect Topics
Tyrosinase is otherwise known as phenolase, catecholase, and polyphenol oxidase. It mainly catalyzes two reactions. Hydroxylation of monophenol to o-diphenols ... www.sciencedirect.com
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Effect of Phenolase on Anthocyanins - Nature
In this communication the effect of a mushroom phenolase ('Tyrosinase', General Biochemicals, Inc.) on purified tart cherry anthocyanins is described. www.nature.com
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Passiflora
Among enzymes, Passiflora was found to be rich in catalase, pectin methylesterase and phenolase. wikipedia.org
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phenol
phenol Chem. (ˈfiːnɒl) [f. Gr. ϕαινο- (see phen-) + -ol 1 (= alcohol).] a. A hydroxyl derivative of benzene, C6H5(OH), commonly known as carbolic acid, q.v. (also phenic or phenylic acid, phenyl hydrate).1852 [see phenic]. 1857 Miller Elem. Chem. III. 568 Phenic, or Carbolic Acid..Phenole..is the mo... Oxford English Dictionary
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Alternaria brassicicola
High phenolase activity, high leaf sugar, and thicker wax layers reduce water-borne spore germination. wikipedia.org
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Insect farming
The enzymatic browning reaction (mainly phenolase or phenol oxidase) can cause the brown or black color on the insect, which leads to discoloration and wikipedia.org
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