• Title/Summary/Keyword: PAK2

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UV-HPLC Determination of Carbowyl Group Using 2-Bromoacetyltriphenylene as a Pre-labeling Reagent - The isolative determination of prostaglandin $E_2$ and $F_2{\alpha}$ by HPLC (2-Bromoacetyltriphenylene 유도체화제를 이용한 카르복실기 함유성분의 분석법 (I) - 프로스타글란딘 $E_2$와$F_2{\alpha}$ 혼합물의 HPLC에 의한 분리정량)

  • 이왕규;정해수;김박광
    • YAKHAK HOEJI
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    • v.30 no.6
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    • pp.311-316
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    • 1986

  • A new UV labeling reagent was developed and used in HPLC for the determination of prostaglandin $E_2$ which have weak UV light-absorbing property. This reagent, 2-bromoacetyltriphenylene, was synthesized by the bromination of 2-acetyltriphenylene which was obtained from triphenylene by Friedel-Crafts reaction. The wave length maximum (${\lambda}_{max}^{CH_3CN}$ of this reagent was 268nm. Prostaglandin E$_2$ was extracted from prostaglandin E$_2$-$\beta$-cyclodextrin using a Sep-pak $C_{18}$ cartridge. The prostaglandin E$_2$ was labeled with 2-bromoacetyl-triphenylene in aectonitrite using 18-crown-6-ether as catalyst. Derivatized prostaglandins were separated on a reversed-phase column (Radial-pak) $\mu$-Bondapak $C_{18}$ using acetonitrile: water=60:40 as mobile phase. The effluent was monitored by UV detector at 254nm filter kit. Linearity of calibration curve was obtained between 30ng and 140ng, and the lower limit of detection was 5ng.

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Effects of Different EC in Nutrient Solution on Growth and Quality of Red Mustard and Pak-Choi in Plant Factory (식물공장내 양액의 EC가 적겨자와 청경채의 생육 및 품질에 미치는 영향)

  • Lee, Sang Gyu;Choi, Chang Sun;Lee, Jun Gu;Jang, Yoon Ah;Nam, Chun Woo;Yeo, Kyung-Hwan;Lee, Hee Ju;Um, Young Chul
    • Journal of Bio-Environment Control
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    • v.21 no.4
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    • pp.322-326
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    • 2012

  • Recently, researches related to plant factory system has been activated and production of Ssam-vegetables using artificial lighting has been increasing. In South Korea, Ssam-vegetables are very popular and the consumption is increasing every year. Because leaf vegetables cultivated under hydroponic systems are more preferable rather than those cultivated by soil culture in Korea, the plant factory system would be more effective in production of Ssam-vegetables. Therefore, this study was carried out in order to analyze the yield and vitamin C contents in red mustard (Brassica juncea L.) and pak-choi (Brassica campestris var. chinensis), which are used a lot for the Ssam-vegetables in South Korea, as influenced by different concentrations of the nutrient solution in a plant factory system. As a results, there was no significant differences in the plant height among the treatment of EC in the nutrient solution, but for red mustard plants, the number of leaves tended to decrease in the treatment with higher EC. Leaf area of pak-choi plants was significantly increased in the higher EC, while the fresh weight had a tendency to increase along with increasing EC in the nutrient solution for both crops. The photosynthetic rates did not show a distinct tendency by EC levels for red mustard plants, but for pak-choi plants, it tended to be higher at the high EC. The contents of ascorbic acid in leaves were higher with decreasing EC concentration in the nutrient solution for red mustard plants, while the content was the highest at EC $2.0dS{\cdot}m^{-1}$ for pak-choi plants. In summary, considering the marketable yields and vitamin C at different nutrient concentrations in a plant factory, the optimal concentration for red mustard and pak-choi plants was thought to be EC $2.0{\sim}2.5dS{\cdot}m^{-1}$.

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