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강삼식(Sam Sik Kang),김주선(Ju Sun Kim),곽의종(Wie-Jong Kwak),김기협(Ki-Hyup Kim) 한국생약학회 1990 생약학회지 Vol.21 No.2
Five biflavones and seven flavonol glycosides were isolated from the leaves of Ginkgo biloba. They were sciadopitysin(1), ginkgetin(2), isoginkgetin(3), bilobetin (4), amentoflavone(5), kaempferol 3-O-[6`-O-p-coumaroyl-β-D-glucopyranosyl(1→2)-α-L-rhamnopyranoside](6), quercetin 3-O-[6`-O-p-coumaroyl-β-D-glucopyranosyl(1→2)-α-L-rhamnopyranoside](8), rutinosides of kaempferol(7), isorhamnetin(9), quercetin (10), laricitrin(11), and kaempferol 3-O-(2, 6-α-L-dirhamnopyranosyl-β-D-glucopyranoside) (12). The structures were established by spectroscopic and chemical methods.
고속액체크로마토그라피에 의한 은행잎중 Flavonoid Glycoside 의 확인 및 정량
강삼식(Sam Sik Kang),김주선(Ju Sun Kim),곽의종(Wie Jong Kwak),김기협(Ki Hyup Kim) 한국생약학회 1990 생약학회지 Vol.21 No.2
Seven flavonol glycosides from the EtOAc fraction of Ginkgo biloba leaves were identified by high performance liquid chromatography. Separation by reversed phase chromatography on Lichrosorb RP-18 column was achieved by isocratic elution. The content of the major acylated flavonol glycoside, kaempferol 3-O-[6`-O-p-coumaroyl-β-D-glucosyl(1→2)-α-L-rhamnoside] was about 8.0% and 0.55% for EtOAc fraction and MeOH extract, respectively.
윤혜숙(Hye Sook Yun-Choi),유경숙(Kyung Sook Yoo),이숙연(Sook Youn Lee),이연희(Youn Hee Lee),곽의종(Wie Jong Kwak),김기협(Ki Hyup Kim) 한국생약학회 1990 생약학회지 Vol.21 No.4
Crude Aconiti Tubers were irradiated with microwave for 5 or 10 min with or without NaHCO₃. Ten min-irradiation reduced the contents of aconitine and mesaconitine to the level of those of commercially available processed Aconiti tuber power which is prepared with the high pressure-high temperature technique. The contents of benzoylaconine of the 10 min-irradiated Aconiti tubers were also comparable to those of commerciallized processed Aconiti tuber powder. However, irradiation with 1%o NaHCO₃ soln. resulted in the drastic reduction of all the three above alkaloids.
김기협 中央醫學社 1968 中央醫學 Vol.14 No.2
The author observed changes of the storage iron content in the thyroidectomized rabbits. The two forms of the storage iron, ferritin and hemosiderin, were estimated with methods of Yoneyama-Konno and Br?ckmann-Zondeck. From the results thus obtained, he reached the following conclusions. 1. In the thyroidectomized animals, the ferritin iron of the liver and spleen increases at one time. This is thought to be a transitory reaction to the blood loss during the operative procedure of thyroidectomy. 2. The storage iron content of the liver, spleen and renal cortex in the thyroidectomized animals decreases linearly from 3 to 6 days after the operation, and the ratio of ferritin iron/hemosiderin iron increases for a definite time postoperatively. After the postoperative decrease, there is a tendency to maintain a constant level of storage iron, and the ratio of both fractions of the storage iron tends to return to normal. 3. In the thyroidectomized animals, the renal medulla and bone, marrow show a tendency to diminish the storage iron content, and no constant ratio of both iron fractions. 4. The storage iron content, especially ferritin fraction, of the duedenum decreases later in the postoperative days. The ratio of both iron fractions also decreases as the storage iron decreases. 5. Although the mechanism concerning the diminution of the storage iron in thyroidectomized animals is not clearly understood, it is thought that one of the important factors is decreased erythropoiesis due to impaired absorption of iron from the gastrointestinal tract.