A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities

Donglin Zhang, Peter C. Quantick*, John M. Grigor, Richard Wiktorowicz, John Irven

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Tyrosinase and malic dehydrogenase were treated with argon and nitrogen. Their activities were measured with time. The activities of tyrosinase and malic dehydrogenase when treated directly with argon, and when treated as a mixture of the enzymes and their substrates, were lower than with nitrogen treatments. The results suggest that argon reduces the activities of tyrosinase and malic dehydrogenase more than nitrogen. Tyrosinase activity with argon treatment was reduced by up to 14.2% more than nitrogen treatment when treated directly, and by up to 22.6% in the mixture of the enzyme and substrate. Malic dehydrogenase activity with argon treatment was reduced by up to 9.5% more than nitrogen treatment when treating the enzyme directly, and by up to 13.9% in the mixture of the enzyme and substrate.

Original languageEnglish
Pages (from-to)45-49
Number of pages5
JournalFood Chemistry
Volume72
Issue number1
DOIs
Publication statusPublished - 1 Jan 2001
Externally publishedYes

Fingerprint

Malate Dehydrogenase
Monophenol Monooxygenase
Argon
malate dehydrogenase
Nitrogen
nitrogen
Enzymes
enzymes
Substrates

Cite this

Zhang, Donglin ; Quantick, Peter C. ; Grigor, John M. ; Wiktorowicz, Richard ; Irven, John. / A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities. In: Food Chemistry. 2001 ; Vol. 72, No. 1. pp. 45-49.
@article{e7050d8b4d7b49daa97ba31319892371,
title = "A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities",
abstract = "Tyrosinase and malic dehydrogenase were treated with argon and nitrogen. Their activities were measured with time. The activities of tyrosinase and malic dehydrogenase when treated directly with argon, and when treated as a mixture of the enzymes and their substrates, were lower than with nitrogen treatments. The results suggest that argon reduces the activities of tyrosinase and malic dehydrogenase more than nitrogen. Tyrosinase activity with argon treatment was reduced by up to 14.2{\%} more than nitrogen treatment when treated directly, and by up to 22.6{\%} in the mixture of the enzyme and substrate. Malic dehydrogenase activity with argon treatment was reduced by up to 9.5{\%} more than nitrogen treatment when treating the enzyme directly, and by up to 13.9{\%} in the mixture of the enzyme and substrate.",
author = "Donglin Zhang and Quantick, {Peter C.} and Grigor, {John M.} and Richard Wiktorowicz and John Irven",
year = "2001",
month = "1",
day = "1",
doi = "10.1016/S0308-8146(00)00201-6",
language = "English",
volume = "72",
pages = "45--49",
journal = "Food Chemistry",
issn = "0308-8146",
publisher = "ELSEVIER SCI LTD",
number = "1",

}

A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities. / Zhang, Donglin; Quantick, Peter C.; Grigor, John M.; Wiktorowicz, Richard; Irven, John.

In: Food Chemistry, Vol. 72, No. 1, 01.01.2001, p. 45-49.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities

AU - Zhang, Donglin

AU - Quantick, Peter C.

AU - Grigor, John M.

AU - Wiktorowicz, Richard

AU - Irven, John

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Tyrosinase and malic dehydrogenase were treated with argon and nitrogen. Their activities were measured with time. The activities of tyrosinase and malic dehydrogenase when treated directly with argon, and when treated as a mixture of the enzymes and their substrates, were lower than with nitrogen treatments. The results suggest that argon reduces the activities of tyrosinase and malic dehydrogenase more than nitrogen. Tyrosinase activity with argon treatment was reduced by up to 14.2% more than nitrogen treatment when treated directly, and by up to 22.6% in the mixture of the enzyme and substrate. Malic dehydrogenase activity with argon treatment was reduced by up to 9.5% more than nitrogen treatment when treating the enzyme directly, and by up to 13.9% in the mixture of the enzyme and substrate.

AB - Tyrosinase and malic dehydrogenase were treated with argon and nitrogen. Their activities were measured with time. The activities of tyrosinase and malic dehydrogenase when treated directly with argon, and when treated as a mixture of the enzymes and their substrates, were lower than with nitrogen treatments. The results suggest that argon reduces the activities of tyrosinase and malic dehydrogenase more than nitrogen. Tyrosinase activity with argon treatment was reduced by up to 14.2% more than nitrogen treatment when treated directly, and by up to 22.6% in the mixture of the enzyme and substrate. Malic dehydrogenase activity with argon treatment was reduced by up to 9.5% more than nitrogen treatment when treating the enzyme directly, and by up to 13.9% in the mixture of the enzyme and substrate.

U2 - 10.1016/S0308-8146(00)00201-6

DO - 10.1016/S0308-8146(00)00201-6

M3 - Article

VL - 72

SP - 45

EP - 49

JO - Food Chemistry

JF - Food Chemistry

SN - 0308-8146

IS - 1

ER -