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김철배 ( Chul Bae Kim ) 전북대학교 인문학연구소 2012 건지인문학 Vol.8 No.-
This paper aims to study Choi Seorim (Gwan-gok), who lived in Taein, Jeongeup in the 17th century, and Yonggye Seowon (alecture hall or a memorial hall for Confucianist services to honor distinguished scholars) where Choi Seorim is enshrined. Choi Seorim (1632~1698) is the central figure of Yonggye Seowon. His family originated from Jinju, Gyeongsangnam-do, his pen name is Gwangok, and his second names are Yeobal and Gyeomtoi. The Manchu war of 1636 broke out when he was five years old, so he had to flee for refuge from Seoul to Younggwang and Muan, Jeollanam-do, and moved to Gohyeonnae in Taein, Jeongeup Jeollabuk-do after the war. His family settled down in Gohyeonnae because his aunt was married to Kim Yeobaek from Dogang Kim family, which was very influential in the town. Furthermore, as his academic career was closely related to the school of Kim Jip (Sindokjae), it was quite natural that his family moved to Taein from the south area like Naju, Muan, Hampyeong, and Haenam of Jeollanam-do where the school of Dongin was more influential. Choi Seorim passed the civil service examination in 1661 (the 2nd reign of King Hyeonjong), but refused to go into government service and stayed in Taein only to study and teach students. Lee Ik (Seongho) introduced Choi Seorim in his book Seonghosaseol that as he taught well, there were lots of students who adored and followed him. In the student list called ``Munsaenglok``, there are 178 literary men listed. Among them, 15 students passed minor civil examinations and three students passed higher level ones. Choi Seorim followed the disciplinary flow of Honam whose representatives were Jeong Geugin and four gentlemen from Taein (Song Serim, Jeong Eonchung, Kim Yakmuk, and Kim Gwan), and he became the second origin that was followed by Eun Jeonghwa and Hwang Jeon. Choi Seorim`s learning is said to be a part of Honam school in that Hwang Yunseok (Yijae), one of the greatest Confucianists of the 18th century, is the son of Hwang Jeon who was the student of Eun Jeonghwa. Yonggye Seowon was built at the place where Choi Seorim had given lectures to his students in 1701 (the 27th year of King Sukjong`s reign) which was two years after he passed away, and he and his five students are enshrined in Yonggye Seowon.
SnO/Sn 혼합 타겟을 이용한 SnO 박막 제조 및 특성
김철,김성동,김은경,Kim, Cheol,Kim, Sungdong,Kim, Sarah Eunkyung 한국재료학회 2016 한국재료학회지 Vol.26 No.4
Tin oxides have been studied for various applications such as gas detecting materials, transparent electrodes, transparent devices, and solar cells. p-type SnO is a promising transparent oxide semiconductor because of its high optical transparency and excellent electrical properties. In this study, we fabricated p-type SnO thin film using rf magnetron sputtering with an SnO/Sn composite target; we examined the effects of various oxygen flow rates on the SnO thin films. We fundamentally investigated the structural, optical, and electrical properties of the p-type SnO thin films utilizing X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV/Vis spectrometry, and Hall Effect measurement. A p-type SnO thin film of $P_{O2}=3%$ was obtained with > 80% transmittance, carrier concentration of $1.12{\times}10^{18}cm^{-3}$, and mobility of $1.18cm^2V^{-1}s^{-1}$. With increasing of the oxygen partial pressure, electrical conductivity transition from p-type to n-type was observed in the SnO crystal structure.
Glucomannan이 노인성 제2형 당뇨병 환자의 당질 및 지질 대사에 미치는 영향
김철식(Chul-Sik Kim),박종숙(Jong-Suk Park),남주영(Joo-Young Nam),남지선(Ji-Sun Nam),조민호(Min-Ho Cho),박진아(Jina Park),김똘미(Dol-Mi Kim),안철우(Chul-Woo Ahn),차봉수(Bong-Soo Cha),임승길(Sung-Kil Lim),김경래(Kyung-Rae Kim),이현철(Hyun 대한임상노인의학회 2004 대한임상노인의학회지 Vol.5 No.4
연구배경: 본 연구자들은 소장에서 당분과 지방질의 흡수를 저해하는 효과가 있는 것으로 알려져 있는 glucomannan을 노인성 제2형 당뇨병 환자에게 투여하여 혈당, 지질 및 인슐린저항성에 어떠한 영향이 있는지 조사하고자 하였다. 방법: 연세대학교 의과대학 내분비내과에 내원한 혈청 총콜레스테롤 농도가 높은 당뇨병 환자 중 60세 이상의 76명을 대상으로 실험군 39명, 대조군 37명으로 나누어 실험군에게는 하루 glucomannan을 대조군에게는 placebo 약제를 총 8주간 투여하였다. 공복혈당과 식후 2시간 혈당은 치료 0, 4, 8주에 측정하였으며, 치료 0, 8주에는 당화혈색소 및 총콜레스테롤, 중성지방, 고밀도 지단백 콜레스테롤, 저밀도 지단백 콜레스테롤을 측정하였으며 혈청 인슐린, C-peptide를 측정하고 인슐린저항성을 파악하기 위해 HOMA score를 산출하였다. 결과: 본 연구를 시행한 결과 다음과 같은 결과를 얻었다. 1) 공복혈당은 glucomannan을 8주간 투여한 후에 유의한 감소를 나타내었으며 식후 2시간 혈당은 glucomannan을 투여한 후 4주부터 감소하였으며 8주째에도 유의한 감소를 보였다. 2) 혈청 총콜레스테롤, 중성지방, 저밀도 지단백 콜레스테롤은 glucomannan 투여 후에 유의한 감소를 보였으나 고밀도 지단백 콜레스테롤은 유의한 변화가 없었다. 3) glucomannan을 8주간 투여한 후 HbA₁c는 투여 전에 비하여 유의하게 감소하였다. 4) HOMA-IR 값은 glucomannan 투여 후에 감소하였으며, HOMA-β 값은 투여 8주에 유의한 증가를 나타내었다. 5) glucomannan 투여가 간기능, 신장기능 및 전해질에는 특별한 영향을 미치지 않았다. 결론: 이상의 연구 결과를 통하여, 노인성 제2형 당뇨병 환자에게서 glucomannan은 혈당 및 지질대사 개선에 효과가 있는 것으로 확인되었다. glucomannan의 작용기전은 식후 고혈당 개선을 통한 인슐린저항성 감소 및 인슐린분비능의 개선으로 생각된다. Background: Glucomannan is known to be effective in reducing glucose and lipid absorption from small intestine. In this study, we tried to investigate the relationship between glucomannan and glucose, lipid profile, and insulin resistance in the elderly type 2 diabetes patients. Method: We have taken 76 type 2 diabetes patinets with hypercholesterolemia, aged over 60 years old, who have visited our endocrine clinic of Yonsei University of Medical College and categorized them into two groups. The experimental group, which consisted of 39 subjects, received daily glucomannan, while the control group, which consisted of 37 patients, received daily placebo for 8 weeks. We have measured fasting glucose, 2hr post-prandial glucose at 0, 4, 8 weeks and HbA1C, total cholesterol, triglyceride, HDL-cholesterol, LDL-cholesterol, insulin, c-peptide levels at 0, 8 weeks, and calculated HOMA score in order to determine insulin resistance. Results: The following results were obtained. 1) 2hr postprandial glucose level was significantly reduced after taking glucomannan for 4 and 8 weeks, and fasting glucose level declined after taking glucomannan for 8 weeks. 2) Serum total cholesterol, triglyceride, LDL-cholesterol levels were significantly lowered after treatment. Serum HDL-cholesterol level had a tendency to increase in the experimental group, but was not statistically significant. 3) HbA₁c was significantly decreased after taking glucomannan for 8 weeks. 4) HOMA-IR was reduced at 8 weeks, and HOMA-β showed a significant increase at 8 weeks. 5) Glucomannan did not have adverse effects on CBC, liver function, renal function, and electrolyte levels. Conclusion: The above study results demonstrate that glucomannan is effective in improving glucose and lipid metabolism in elderly type 2 diabetes patients. Glucomannan enhances insulin resistance by lowering postprandial gluocse level and stimulating insulin secretion.
김철,최현,김정진,김종규,김명석,안병태,박형진,Kim, Chul,Choi, Hyun,Kim, Chung-Chin,Kim, Jong-Kyu,Kim, Myung-Suk,Ahn, Byung-Tae,Park, Hyoung-Jin 대한생리학회 1974 대한생리학회지 Vol.8 No.1
The influence, upon male rat's mating behavior, of Korean Panax Ginseng administered for 3 and 5 days was investigated by direct behavioral observation and also by counting the number of copulation plugs the animals deposited. Four쇼-four male albino rats were used. Part of the animals received ginseng for 3 days (ginseng-3 day group, N= 12) or for 5 days(ginseng-5 day group, H=10), while the remaining animals received saline for 3 days (saline-3 day group, N=12) or for 5 days (saline-S day group, N=10). Each animal belonging to the 2 ginseng groups received subcutaneously 0.5 ml/100 g body weight of ginseng alcohol extract solution (4 mg of the ethyl alcohol extract in 1 ml of physiological saline), and each rat belonging to the 2 saline groups received the same amount of saline per day. During the dark period of the light-dark cycle on the next day following the last drug administration, a female rat in the artificial estrus was introduced to each male and the mating behavior was observed for 45 minutes. The observation session was divided into two parts and, in the early part which terminated with the first ejaculation and succeeding intromission, following behavioral measures were taken: mounting latency, intromission latency, inter-intromission period, ejaculatory latency(time from the first intromission until the first ejaculation), occurrence of mounting with intromission, occurrence of mounting without intromission, and postejaculatory interval. Behavioral measures taken in the later part of the session after the first ejaculation were: occurrence of mounting with intromission, occurrence of mounting without intromission, and occurrence of ejaculation. Immediately after the behavioral observation session the experiment turned to measure, for 10 days, the number of copulation plug which each pair of rats deposited. Following results were obtained: 1. After several mountings mounting with intromission, males of the 2 ginseng groups finished the first ejaculation significantly earlier than the corresponding 2 saline groups did. 2. The postejaculatory latency was significantly reduced in the ginseng-5 day group compare with the value of the saline-5 day group and also compared with the value of the ginseng-3 day group. 3. The 2 ginseng groups ejaculated significantly more often in 45 minutes' observation session than the corresponding 2 saline groups did. 4. The number of copulation plug deposited in 10 days by the animals of the 2 ginseng groups. significantly exceeded the number deposited by the corresponding 2 saline group animals. The animals of the ginseng-5 day group deposited copulation plugs significantly more than the animals of the ginseng-3 day group did. It is inferred from the above results that the ginseng facilitates mating behavior of male rats, and that the degree of facilitation may be influenced by the duration of drug administration.