• Journal of Bio-Environment Control
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• v.27 no.3
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• pp.213-221
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• 2018

We analyzed the skin coloration and anthocyanin composition of 'Kyoho' and 'Heukboseok' grape berries to determine the cause of poor coloring in 'Kyoho' berry skins under high temperature (HT) at veraison. Although the skin coloration inhibited in both 'Kyoho' and 'Heukboseok' berries under HT for 30 days from veraison, the total anthocyanin content in 'Heukboseok' berry skins increased to the level of control after the end of temperature treatment, but 'Kyoho' did not increase. Malvidin derivatives were most significantly reduced in 'Kyoho' berry skins, followed by those of delphinidin and petunidin. Among individual anthocyanins, diglucosides and acylated malvidin derivatives were most decreased in 'Kyoho' berry skins. Acylated and tri-hydroxylated anthocyanins were reduced more than those of non-acylated and dihydroxylated, respectively. All different types of anthocyanin components in 'Kyoho' berry skins decreased by HT, and they were similar to that of total anthocyanin. In 'Heukboseok' berry skins, accumulations of all different types of anthocyanins were inhibited by HT, and increased to the level of control after the end of the treatment. These results suggest that the poor coloration of 'Kyoho' under HT at veraison was not caused by the decrease of specific anthocyanins but because the whole anthocyanin biosynthesis was suppressed by HT.

• Proceedings of the Korean Fiber Society Conference
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• 1999.10a
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• pp.267-270
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• 1999

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2001.04a
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• pp.103-106
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• 2001

• Proceedings of the Korean Fiber Society Conference
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• 2001.04a
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• pp.325-328
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• 2001

• Bulletin of Food Technology
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• v.24 no.4
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• pp.605-612
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• 2011

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2005.05a
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• pp.122-127
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• 2005

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.126-128
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• 2008

본 연구에서는 포도송이를 절개하지 않고 광학적인 방법으로 당도를 측정하였다. 광원으로는 $615{\sim}635nm$ 파장 대역의 LED를 사용하였다. 포도의 당도는 안토시아닌의 분포량에 의해 결정되는데 적포도의 경우 적색이 강할수록 안토시아닌이 많이 분포되어있다. 측정 결과 적색을 많이 띠는 적포도의 경우 광 강도가 낮은 것을 확인하였다. 또한 광학적인 방법으로 측정된 광 강도와 당도계로 얻어진 당도를 비교 분석하였다. 그 결과 포도송이의 당도에 따른 상대적 광 강도를 확인하였다.

• Electrical & Electronic Materials
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• v.7 no.5
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• pp.409-416
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• 1994

A double layered photoreceptor using phthalocyanine dye was made by dip-coating method. The under cutting layer(UCL) was coated with A1$\_$2/O$\_$3/ or polyamide, and the charge generation layer(CGL) was formed by .tau.-type metal-free phthalocyanine. The oxadiazole was used as a charge transport layer(CTL) and polycarbonate and poly(vinyl butyral) was employed as a host polymer. The .tau.-H$\_$2/Pc had an absorption peak around 780nm, which coincided with the emitting wavelengths of GaAlAs diode lasers. Maximum charge acceptance of CTL that gives thickness of 12.mu.m was -900V by corona charge of -6.0kV. In photo-induced discharge measurements, residual potential was less than -20V and sufficient for ordinary use, and sample films using of poly(vinyl butyral) was showed good charge retention. In printing test, drum that was employed polycarbonate as a host polymer showed the good print quality.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2006.04a
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• pp.514-516
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• 2006

• Proceedings of the Korean Vacuum Society Conference
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• 2006.08a
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• pp.176-176
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• 2006