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감태, Ecklonia cava 유주자 침지시간에 따른 기질별 유엽의 부착밀도 및 초기성장
최태봉,라성주,유태식,윤순기 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.6
The growth and attachment density of Ecklonia cava germlings were investigated with zoospore immersion time(30, 60, 120, 180, and 240 mins) and substrates(concrete block and natural stone). The spores which is released in November 21, 2011, developed into young blade in February 24, 2012, and then quickly grew in the experimental groups 30 minutes, 60 minutes, and 120 minutes in the natural water temperature for 75 days. However, in the zoospores released at 16 and 20℃, germlings were found more rapidly than 2 weeks, and their growth and density were higher at 16℃ than 20℃. However, there was no significant difference between the tested substrates.
아미노산 6종에 대한 개불, Urechis unicinctus 유생의 착저반응
최태봉,라성주,윤순기,유태식,최상덕 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.6
Settlement and metamorphosis of marine invertebrate larvae are induced by substratum-specific biochemical signals from the environment. In several species, a basic similarity between the biochemical signals required for induction of larval settlement and metamorphosis has been found. These inducers are protein or peptide associated from amino acids. So we thought that larvae and adult were closely connected. We analyzed amino acids of the Urechis unicinctus larvae, mucus, egg and sperm. And investigation was carried out on the effects of six different amino acids on larval settlement of the Urechis unicinctus. Among them, the most effective amino acid was leucine which had a lower threshold of settlement of 1×10-7M and caused settlement rate was more than 20%. Glycyn, alanine, lysine, aspartic acid and glutamic acid had thresholds between 1×10-6M and 1×10−2M. On the other hand, lysine induced a high percentage of larval settlement at 1×10-5M, but became toxic at high concentration.
CEPA 처리가 옻나무의 칠액분비 및 수피생리에 미치는 영향
최태봉(Tae Bong Choi),김만조(Mahn Jo Kim),현정오(Jung Oh Hyun) 한국산림과학회 2000 한국산림과학회지 Vol.89 No.1
This study was conducted to investigate the effects of CEPA(2-chloroethyl phosphonic acid) on bark physiology and anatomy of lactree(Rhus verniciflua Stokes). Sample trees of similar size and growth rate were selected from 7-year-old lactree plantation located in Hyengsung-kun, Kangwon-do. Lanolin pastes containing 0.1, 1, or 10% CEPA were put into the bark-removed hole made by corer(ø1㎝) on the main stem at 1.2m above the ground on June 16, 1995. Five weeks after application of CEPA, bark thickness was markedly increased as a result of the increase in the amount of phloem and intercellular spaces, and correlated with the increased production of urushiol. By the application of 10% CEPA, bark thickness was increased approximately 2.5 times, and the urushiol content within bark was increased 2.8 times compared to that of untreated trees because CEPA stimulated the accumulation of urushiol within bark. Treatment of 10% CEPA also increased the size and the total number of secretory canals, and induced an increase in ray width. The phloem parenchyma cells of CEPA-treated trees were well-developed and closely packed with little intercellular space.