Relationship of Superficial Scald Development and -Farnesene Oxidation to Reactions of Diphenylamine and Diphenylamine Derivatives i
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- 作者：David R. Rudell ; James P. Mattheis ; and John K. Fellman
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2005
- 出版时间：October 19, 2005
- 年：2005
- 卷：53
- 期：21
- 页码：8382 - 8389
- 全文大小：234K
- 年卷期：v.53,no.21(October 19, 2005)
- ISSN：1520-5118
文摘
Cv. Granny Smith apple fruit, treated at harvest with aqueous emulsions containing diphenylamine(DPA) and DPA derivatives, were evaluated for the peel disorder superficial scald (scald) after 6months of cold storage at 1 
C plus 0 or 7 days at 20 C. Metabolism of these derivatives and
pha.gif" BORDER=0>-farnesene oxidation were also evaluated after 6 months. Derivatives substituted at the para positionprevented scald, but scald developed on fruit treated with derivatives substituted in the amino, ortho,or meta positions. The extent of scald control was also dependent on the chemical nature of thefunctional group used to derivatize DPA. Hydroxylation of DPA and DPA derivatives during storagewas not associated with scald control. Methoxylated DPA derivatives produced during storage resultedfrom O-methylation of C-hydroxylated derivatives rather than C-methoxylation of DPA. N-Nitrosodiphenylamine provided partial scald control, possibly resulting from its degradation to DPA, indicatingthat the amino hydrogen of DPA may be crucial for scald control. Results suggest that functionalgroup position and chemical properties both contribute to the efficacy of DPA derivatives for scaldcontrol.Keywords: Malus sylvestris L. (Mill.) var. domestica Borkh. Mansf; scald; LCMS; antioxidant
C plus 0 or 7 days at 20 C. Metabolism of these derivatives andpha.gif" BORDER=0>-farnesene oxidation were also evaluated after 6 months. Derivatives substituted at the para positionprevented scald, but scald developed on fruit treated with derivatives substituted in the amino, ortho,or meta positions. The extent of scald control was also dependent on the chemical nature of thefunctional group used to derivatize DPA. Hydroxylation of DPA and DPA derivatives during storagewas not associated with scald control. Methoxylated DPA derivatives produced during storage resultedfrom O-methylation of C-hydroxylated derivatives rather than C-methoxylation of DPA. N-Nitrosodiphenylamine provided partial scald control, possibly resulting from its degradation to DPA, indicatingthat the amino hydrogen of DPA may be crucial for scald control. Results suggest that functionalgroup position and chemical properties both contribute to the efficacy of DPA derivatives for scaldcontrol.Keywords: Malus sylvestris L. (Mill.) var. domestica Borkh. Mansf; scald; LCMS; antioxidant