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Antioxdant Activity of Hibiscus cannabinus L. Leaves in Different Growth Time
김성무,엄석현,박형재,유창연,조동하,Jin, Cheng-Wu,Eom, Seok-Hyun,Park, Hyoung-Jae,Ghimeray, Amal Kumar,Yu, Chang-Yeon,Cho, Dong-Ha The Korean Society of Medicinal Crop Science 2009 韓國藥用作物學會誌 Vol.17 No.1
The results on the useful functional compounds of kenaf (Hibiscus cannabinus L.) leaves cultivated in reclaimed lands and the biological activity effects of extracts were as follows. On 98 days after sowing (DAS) Tainung-2 showed the highest total chlorophyll content (1.68 mg/g), and on 141 DAS Dowling showed higher chlorophyll content (1.50 mg/g) than the other two did. In all cultivars the total chlorophyll content was higher on 141 DAS than on 98 DAS. Total polyphenol and total flavonoid contents were the highest in Tainung-2 (30.50 mg/g and 57.03 mg/g, respectively), and total polyphenol and total flavonoid contents (30.50 mg/g and 57.03 mg/g, respectively) were the highest in 30% ethanol extraction. Ascorbic acid contents were higher on 141 DAS than on 98 DAS in three cultivars. SOD activities of kenaf leaf extract were generally over 90%. DPPH radical scavenging activity of Tainung-2 was higher than others.
김성무,윤주희,변성용,전상규,이준엽 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-
Organic compounds prepared from 1- position activated 9-phenylcarbazole interconnected withdiphenyltriazine functionalized carbazole were examined as bipolar host materials of phosphorescentand thermally activated delayedfluorescent organic light-emitting diodes. Interconnection position ofthe 9-phenylcarbazole was 1- position, and that of diphenyltriazine functionalized carbazole waschanged from 1- position to 4- position. Main influence of the interconnection position was currentdensity of the device and 2- or 3- position interconnection increased current density of the devices. Allhost materials derived from the 1- position activated 9-phenylcarbazole performed well as the host ofphosphorescent and thermally activated delayedfluorescent organic light-emitting diodes.