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조윤섭,조혜성,박문영,박재옥,박태동,김월수 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-
This study was designed to find out an alternative to artificial pollination in kiwifruit production. The parthenocarpic kiwifruits induced by (N-2-chloro-4-pyridyl)-N-phenyl urea (CPPU) treatment tended to be less attractive due to deep furrowing and excessive outgrowth of stigma in mature fruits. Especially, on flower buds after CPPU spray, severe fruit-drop was induced. It was considered enough to spray CPPU at more than 4ppm to attain sufficient fruit set but needed to spray CPPU at more than 16ppm to attain marketable fruit size. When CPPU at 16ppm was sprayed to the same flower once, twice or three time, the fruits received CPPU treatment more time was larger but less attractive. Application of CPPU mare than at 16ppm seemed to be necessary to produce fruits heavier than 80 gr. Enlargement of the fruits received CPPU treatment mainly occurred cross wisely and vertical development was not affected and thickening of outer pericarp primarily contributed to the fruit enlargement. Difference in flesh color or contents of vitamin C and sugars between control fruits and CPPU-treated fruits was not noticed. In conclusion, CPPU treatment to induce parthenocarpic kiwifruits could be commercially applicable, only the method for improving fruit appearance is worked out.
Poly(DL-lactide-co-glycolide)Copolymer Micelles for Drug Delivery System(I)
Kim, Ju-Ryoung,Lee, Tae-Bum,Cha, Wol-Suk,Kwan, Kyu-Hyuk,Lee, Dong-Byung,Nah, Jae-Woon,Jong, Song-Rok CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.2
As the result of the study to overcome the disadvantage of administration and therapy in medical fields, the most interesting field has been appeared in the polymers decomposed without having injurious effects on the human body. Poly DL-lactide, poly glycolide and poly (Dl-lactide-co-glycolide)(DL-PLGA) are suited for the medical treatment purpose. Generally the excessive dose of conventional drugs in the medical treatment has caused side effects in an human body as well as the disadvantage of ailments required of the frequent administrations. But the advent of drug delivery of a constant dose long. In this study, the release experiments of drug were operated in the phosphate buffer solutions of pH 7.4 and 37.0±0.5℃ by using micelles prepared in poly(DL-lactide??-co-glycolide??) with clonazepam for delivery drug. The lineary release time according to the kinds of micelles prepared with the copolymer/drug ratio of 20:40, 20:20, and 40:20 was delayed in the order of 20:40>20:20>40:20. Amount of drug release accoding to the kinds of micelles showed similar patterns. In short, the fomulation allows polymeric micelles to suppress the burst effect of the drug release mechanism, which led to the controlled release pattern and micelles.