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

doi:10.1016/S0308-8146(00)00201-6

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 journal › Article

25 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 language	English
Pages (from-to)	45-49
Number of pages	5
Journal	Food Chemistry
Volume	72
Issue number	1
DOIs	https://doi.org/10.1016/S0308-8146(00)00201-6
Publication status	Published - 1 Jan 2001
Externally published	Yes

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Zhang, D., Quantick, P. C., Grigor, J. M., Wiktorowicz, R., & Irven, J. (2001). A comparative study of effects of nitrogen and argon on tyrosinase and malic dehydrogenase activities. Food Chemistry, 72(1), 45-49. https://doi.org/10.1016/S0308-8146(00)00201-6

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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.",

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

AU - Zhang, Donglin

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AU - Grigor, John M.

AU - Wiktorowicz, Richard

AU - Irven, John

PY - 2001/1/1

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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.

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

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