수중운동시 잠수복착용 피검자의 열 평형. 특히 잠수장갑 및 버선착용의 영향

최장규,홍성원,박양생 고신대학교 의학부 1986 高神大學校 醫學部 論文集 Vol.2 No.1

In 5 wet-suited subjects, changes in body temperature and heat exchanges were studied at rest and during exercise in water of 17℃. The subjects were protective gloves and boots in one series and none of these in the other in order to evaluate the effect of selective cooling of hands and feet on the response of the thermoregulatory systems. When the subjects were resting in water the rectal and mean skin temperature changes, the metabolic heat production, the overall body insulation and the heat loss through the skin were not apparently altered by protecting hands and feet. However, during exercise in water, the mean skin temperature was maintained at 2~3℃ higher level and the rectal temperature at a similar (during light exercise) or slightly(15℃) lower (during heavy exercise) levels with the protection than those without the protection. Although the core to skin temperature gradient was lower in the former than in the latter situation the rate of skin heat loss appeared to be similar due to the overall insulation of the body was lower in the former than in the latter. The steady-state local skin temperature at trunk and extremities during exercise was significantly higher with the protection of hands and feet than those without the protection, the difference being increasingly greater at more distal parts of extremities. These results indicate that in wet suit divers working in cold water (of approximately 17℃) the protection of hands and feet by wearing gloves and boots induces less intensive vasoconstriction (hence lower thermal insulation) at the peripheral tissues, especially at the limbs. As a consequence, the protection of hands and feet is ineffective in reducing body heat loss. However, it may be particularly significant in maintaining the skin temperature high for the subject's comfort and also in preventing hyperthermia which may be induced during very high levels of exercises.

동구기행

최장규,Choe, Jang-Gyu 대한건축사협회 1990 建築士 Vol.1990 No.11

수중운동시 잠수복착용 피검자의 열 평형. 특히 잠수장갑 및 버선착용의 영향

최장규,홍성원,박양생 고신대학교(의대) 고신대학교 의과대학 학술지 1986 고신대학교 의과대학 학술지 Vol.2 No.1

In 5 wet-suited subjects, changes in body temperature and heat exchanges were studied at rest and during exercise in water of 17℃. The subjects were protective gloves and boots in one series and none of these in the other in order to evaluated the effect of selective cooling of hands and feet on the response of the thermoregulatory systems. When the sujects were resting in water the rectal and mean skin temperature changes, the metabolic heat production, the overall body insulation and the heat loss through the skin were not apparently altered by protecting hands and feet. However, during exercise in water, the mean skin temperature was maintained at 2~3℃ higher level and the rectal temperature at a similar(during light exercise) or slightly(1.5℃) lower (during heavy exercise) levels with the protection than those without the protection. Although the core to skin temperature gradient was lower in the former than in the latter situation the rate of skin heat loss appeared to be similar due to the overall insulation of the body was lower in the former than in the latter. The steady-state local skin temperature at drunk and extremities during exercise was significantly higher with the protection of hands and feet than those without the protection, the difference being increasingly greater at more distal parts of extremities. These results indicate that in wet suit divers working in cold water (of approximately 17℃) the protection of hands and feet by wearing gloves and boots induces less intensive vasoconstriction (hence lower thermal insulation) at the peripheral tissues, especially at the limbs. As a consequence, the protection of hands and feet is ineffective in reducing body heat loss. However, it may bbe particularly significant in maintaining the skin temperature high for the subject's comfort and also ini preventing hyperthermia which may be induced during very high levels of exercises.

보온장갑 착용이 잠수복 착용 잠수사의 열 평형에 미치는 영향

최장규,연동수,박양생 고신대학교(의대) 고신대학교 의과대학 학술지 1985 고신대학교 의과대학 학술지 Vol.1 No.1

The effect of wearing protective gloves on the thermal exchanges in cold water was studied in 4 Korean women wet suit divers. The subject was immersed in the water of critical temperature(average temperature was 16.5℃) and rested for 3 hours. The steady-state rectal temperature was lower with gloves(37.01±0.10(SE)℃) than without gloves(37.31±0.1℃), the different being statistically significant(P<0.05). On the other hand, the metabolic heat production was 17% higher with gloves(52.63±4.90(SE) kcal/hr·m²) than without gloves(44.93±2.49). Consequently, the total peripheral insulation was reduced(19%) by wearing gloves. At a given average skin temperature the threshold rectal temperature for shivering was approximately 0.5℃ higher without gloves than with gloves. These results suggest that 1)the total insulation of the wet suited subject is effectively increased by selective cooling of the hand, and 2) the metabolic rersponse to body cooling is sensitively affected by the skin temperature of the distal extremities. The practical implications of these findings are discussed.

잠수복 착용 피검자에서 침수시 잠수장갑 및 버선 착용에 따른 체온조절기능의 변화

최장규,김정숙,박양생 高神大學 醫學部 1988 高神大學醫學部 論文集 Vol.4 No.1

보온장갑 착용이 잠수복 착용 잠수사의 열 평형에 미치는 영향

최장규,연동수,박양생 高神大學 醫學部 1985 高神大學醫學部 論文集 Vol.1 No.1

수중운동시 잠수복착용 피검자의 열 평형, 특히 잠수장갑 및 버선착용의 영향

최장규,홍성원,박양생 高神大學 醫學部 1986 高神大學醫學部 論文集 Vol.2 No.1

잠수복 착용 피검자에서 침수시 잠수장갑 및 버선 착용에 따른 체온조절기능의 변화

최장규,김정숙,박양생 고신대학교(의대) 고신대학교 의과대학 학술지 1988 고신대학교 의과대학 학술지 Vol.4 No.1

In 5 wet-suited subjects, changes in body temperature, heat exchanges and thermal insulations were studied at rest and during exercise in water of 13℃. The subjects wore neoprene gloves and boots in one series and exposed their hands and feet to water in the other series of experiments. In the subjects resting in water, the gloves and boots did not affect the level of rectal temperature but increased the mean skin temperature slightly, reducing the core-to-skin temperature gradient. However, the total thermal insulation of the subject was reduced significantly and consequently the rate of skin heat loss was increased by wearing gloves and boots. The metabolic response of the subject appeared to be significantly augmented by wearing gloves and boots. In exercising subjects the level of body temperature and the thermo-regulatory variables were not apparently changed by wearing gloves and bootss. These results indicated that in wet-suited subjects resting in cold water, exposure of hands and feet increases peripheral insulation and consequently effectively reduces heat loss to water. Such an effect of peripheral cooling is lost during exercise by hypermia to skeletal muscles in the limbs.

보온장갑 착용이 잠수복 착용 잠수사의 열 평형에 미치는 영향

최장규,연동수,박양생 고신대학교 의학부 1985 高神大學校 醫學部 論文集 Vol.1 No.1

The effect of wearing protective gloves on the thermal exchanges in cold water was studied in 4 Korean women wet suit divers. The subject was immersed in the water of critical temperature (average temperature was 16.5℃) and rested for 3 hours. The steady-state rectal temperature was lower with gloves(37.01±0.10(SE)℃) than without gloves (37.31±0.1℃), the different being statistically significant (P<0.05). On the other hand, the metabolic heat production was 17% higher with gloves (52.63±4.90(SE)kcal/hr ㎡) than without gloves(44.93±2.49). Consequently, the total peripheral insulation was reduced (19%) by wearing gloves. At a given average skin temperature the threshold rectal temperature for shivering was approximately 0.5℃ higher without gloves than with gloves. These results suggest that 1)the total insulation of the wet suited subject is effectively increased by selective cooling of the hand, and 2)the metabolic response to body cooling is sensitively affected by the skin temperature of the distal extremities. The practical implications of these finding are discussed.

Phenolic Compounds and Triterpenes from the Barks of Diospyros burmanica

최장규,조재열,김영동,Khin Myo Htwe,이우신,이준철,김진웅,윤기동 한국생약학회 2015 Natural Product Sciences Vol.21 No.2

Diospyros burmanica Kurz. is an evergreen deciduous tree distributed in Mandalay of Myanmar, which belongs to the family of Ebenaceae. In Myanmar, it has been used to treat diarrhea, diabetes, diabetes and also as lumbers. In this study, seven flavonoids (1 - 7), a phenolic compound (8), and five triterpenes (9 - 13) were isolated from the barks of D. burmanica and their chemical structures were elucidated. Isolates were identified to be (+)-catechin (1), (+)-catechin 3-O-a-L-rhamnopyranoside (2), (+)-catechin 3-O-gallate (3), (-)-epicatechin (4), (-)-epicatechin 3-O-gallate (5), (+)-afzelechin 3-O-a-L-rhamnopyranoside (6), (+)-2,3-trans-dihydrokaempferol 3-O-a-L-rhamnopyranoside (7), methyl gallate (8), lupeol (9), methyl lup-20(29)-en-3-on-28-oate (10), b-amyrin (11), a-amyrin (12), 3b-hydroxy-D:B-friedo-olean-5-ene (13) through MS, 1H NMR and 13C NMR spectroscopic evidences.