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운동유발성 고혈압(Exercise-Induced Hypertension)의 특성 분석
조종현,강재영,제세영,이병섭,유영주,홍선희,김상원,박광태,김도경,이시욱,박원하 대한스포츠의학회 1997 대한스포츠의학회지 Vol.15 No.2
Exercise-induced hypertension means abnormal exaggeration of blood pressure during exercise in the person whose resting blood pressure is in normal range. In resent studies, people with exercise-induced hypertension are in greater risk of development of hypertenson in future. Not enough researches, however, have been done so far on the relationship between exercise-induced hypertension and cardiorespiratory function, coronary artery disease(CAD) risk factors, or daily calorie between exercise-induced hypetension group and control group. Included CAD risk factors were body composition, heart rate and blood pressure during graded exercise tests, exercise duration, TCHO, HDL-C, LDL-C, TG, BG and TCHO/HDL-C ratio. The exercise-induced hypertension group consisted of 47 persons who had normal blood pressure at rest but whose systolic pressure reached 230 mmHg or more, or diastolic pressure was 110 mmHg or more during exercise tests. The control group included 52 persons who showed normal blood pressure during exercise. The results were ; 1. There were significant differences in Resting HR, Resting SBP between two groups. 2. There were significant differences in TCHO, TCHO/HDL-C ratio, and TG, which are CAD risk factors between two groups. 3. Among CAD risk factors, TG influenced exercise-induced hypertension. With these results, it could be suggested that exercise-induced hypertension group, had higher TCHO, HDL-C, and TG than control group, Its mechanism, however, is not clear so that additional researches are requested to provide a standardized protocol of exercise tests including age, gender, CAD risk factors and physical fitness level for early detection of hypertension.
Sympathetic Regulation of Aquaporin Water Channels in Rat Kidney
Lee, Jong-Un,Yoo, Kwang-Jay,Oh, Yoon-Wha,Lim, Dong-Yoon The Korean Society of Pharmacology 2003 The Korean Journal of Physiology & Pharmacology Vol.7 No.3
Whether there exists a sympathetic neural regulation on the aquaporin (AQP) channels in the kidney was examined. Male Sprague-Dawley rats were used. They were renal nerve denervated by stripping the nervous and connective tissues passing along the renal artery and vein, and painting these vessels with 10% phenol solution through a midline abdominal incision. Three days later, the expression of AQP1-4 proteins in the denervated kidneys was determined. The content of norepinephrine was found significantly decreased following the denervation. Accordingly, the expression of AQP2 proteins was markedly decreased. The expression of AQP3 and AQP4 was also slightly but significantly decreased, while that of AQP1 was not. Neither the basal nor the AVP-stimulated accumulation of cAMP was significantly affected in the denervated kidney. It is suggested that the sympathetic nervous system has a tonic stimulatory effect on AQP channels in the kidney.
동물성과 식물성 시판 체다 치즈의 향미 특성 및 조직감 분석
권병수(Byoung Soo Kwon),이재헌(Jay Heon Lee),이광연(Kwang Yeon Lee),김서진(Seo Jin Kim),전남배(Nam Bae Jeon),유홍훈(Hong Hoon Yoo),이현규(Hyeon Gyu Lee) 한국식품과학회 2021 한국식품과학회지 Vol.53 No.5
본 연구는 동물성과 식물성 시판 체다 치즈의 향미 특성과 조직감을 분석하기 위해 전자코와 전자혀 및 TPA 분석을 이용하였다. Milky, dairy, buttery, creamy, nutty, fruity의 향미속성을 바탕으로 전자코 분석 결과 확인된 화합물 5종을 주요 향기성분으로 선정하였으며, 모든 시료에서 acetaldehyde, 2-methylbutanal 및 n-butanol이 검출되었으나, 2,3-pentanedione과 pentan-2-one은 DT1, VT1 및 VT3에서만 검출되었다. 주성분 분석 결과 VT간에 군집을 이루지 않고 분산되어 있어 동일한 타입 내 시료 간 향기의 유사도가 떨어지는 것으로 나타내었다. VT의 맛 패턴은 DT와 유사한 경향으로 나타나지 않았으며, DT와 VT 내 시료 간에도 맛패턴이 원재료에 의해 구분되지 않았다. 시판 체다 치즈의 조직감 측정 결과는 경도, 부착성, 탄력성 및 응집성 항목에서 생산원료의 타입에 따라 구분되지 않는 것으로 나타내었으나, 조직감에 영향을 미치는 DT와 VT의 단백질 함량은 각각 18.0-20.0%와 1.0% 미만이었다. 본 연구결과는 동물성 치즈와 유사한 향미 특성과 조직감을 갖는 식물성 치즈 제품 개발의 기초자료로서 품질 지표 설정에 활용될 수 있을 것으로 판단된다. This study compared the quality characteristics of commercial Cheddar cheese of dairy types (DT) and vegan types (VT) using electronic sensory evaluation (nose and tongue) and texture profile analysis (TPA). The electronic nose detected acetaldehyde, 2-methylbutanal, and n-butanol in all samples, whereas 2,3-pentanedione and pentan-2-one were detected in DT1, VT1, and VT3. The electronic tongue detected various intensities of six tastes in the two types, regardless of the raw material. Principal component analysis by electronic sensory evaluation revealed the differences between the pattern for VT. The TPA results showed that the textures of DT and VT were not classified according to the raw material. However, the protein content affecting texture was <0.6% for VT compared with that for DT. These results are expected to be useful for establishing quality indicators in developing vegan cheese products with characteristics similar to those of dairy cheese.
A Central Pressor Response to Endogenous Nitric Oxide Synthesis Inhibition in Anesthetized Rats
Moon, Sung-Ho,Yang, Min-Joon,Oh, Seung-Ho,Kim, Mi-Won,Yoo, Kwang-Jay,Lee, Jong-Eun,Jun, Jae-Yeoul,Yeum, Cheol-Ho,Yoon, Pyung-Jin The Korean Physiological Society 1994 대한생리학회지 Vol.28 No.2
The present study was aimed to determine if endogenous L-arginine-nitric oxide (NO) pathway has central, rather than peripheral, mechanisms in blood pressure regulation. Arterial blood pressure and heart rate responses to acute inhibition of the t-arginine-NO pathway were examined in rats anesthetized with thiopental (50 mg/kg, IP). An intracerebroventricular (ICV) cannula was placed in the left lateral ventricle. The right femoral artery was cannulated to measure arterial blood pressure and the vein to serve as an infusion route. $N^G-nitro-L-arginine$ methyl ester (L-NAME) was infused either intracerebroventricularly or intravenously. ICV infusion $(1.25\;{\mu}L/min)$ of L-NAME $(20\;or\;100\;{\mu}g/kg)$ per minute for 60 min) increased the mean arterial pressure and heart rate. Plasma renin concentrations(PRC) were significantly lower in L-NAME-infused group than in the control. L-Arginine $(60\;{\mu}g/min,\;ICV)$ prevented the pressor response to ICV L-NAME. The pressor response was not affected by simultaneous intravenous infusion of saralasin, but was abolished by hexamethonium treatment. Intravenous infusion $(40\;{\mu}L/min,\;10{\sim}100\;{\mu}g/kg\;per\;minute\;for\;60\;min)$ also increased blood pressure, while it decreased heart rate. These results indicate that endogenous L-arginine-NO pathway has separate central and peripheral mechanisms in regulating the cardiovascular function. The central effect may not be mediated via activation of renin-angiotensin system, but via, at least in part, activation of the sympathetic outflow.
Role of Endogenous Nitric Oxide in the Control of Renin Release
Lee. Je-Jung,Kim. Dong-Ho,Kim. Young-Jae,Kim. Won-Jae,Yoo. Kwang-Jay,Choi. Ki-Chul,Lee. Jong-Eun 대한생리학회 1994 대한생리학회지 Vol.28 No.2
The present study was undertaken to investigate the role of endogenous nitric oxide in renin release under different physiological conditions. In the first series of experiments, renin release was either inhibited by acute volume-expansion (VE) or stimulated by clipping one renal artery in the rat. VE was induced by intravenous infusion of saline (0.9% NaCl) up to 5% of the body weight over 45 min under thiopental (50 mg/kg, IP) anesthesia. VE caused a decrease of plasma renin concentration (PRC). With N<sup>G</sup>-nitro-L-arginine methyl ester (L-NAME, 5 μg/kg per min) superadded to VE, PRC decreased further. The magnitude of increase in plasma atrial natriuretic peptide levels following VE was not affected by the L-NAME. In two-kidney, one clip rats, L-NAME-supplementation resulted in a decrease, and L-arginine-supplementation an increase of PRC. Plasma atrial natriuretic peptide levels were significantly lower in the L-arginine group than in the control. Blood pressure did not differ among the L-NAME, L-arginine, and control groups. In another series of experiments, the renin response to a blockade of NO synthesis was examined using in vitro preparations from isolated renal cortex. L-NAME significantly increased basal renin release, although it was without effect on the isoproterenol-stimulated release. These findings suggest that endogenous nitric oxide significantly contributes to the renin release. Since many factors may affect the renin release in vivo, an interaction between NO and renin under various pathophysiological states is to be further defined.
키토산올리고당을 이용한 넙치 기생성 스쿠티카 섬모충 ( Scuticociliatids ) 구충 효과 - 1 . 약욕에 의한 구충효과 -
김정우(Jung Woo Kim),송현철(Hyun Chul Song),김희경(Hee Kyung Kim),유광재(Kwang Jay Yoo) 한국키틴키토산학회 2001 한국키틴키토산학회지 Vol.6 No.2
N/A The purpose of this study was to evaluate the antiparasitic activity of chitosan-oligosaccharides to Scuticociliatids. All Scuticociliatids used were directily collected from Paralichthys olivaceus. Chitosan-oligosaccharides consisting of 73.4% with 1-4 oligosaccharides and 26.6% over tetramer were prepared. After the treatment of 0.5%(w/v) chitosan-oligosaccharides against Schuticociliatids, there were dramatically decreased numbers of the protozoan up to approximately 98% in 3 minutes, 100% in 5 minutes compared to those in the control(P<0.01). Also the treatments of 0.3%(w/v) chitosan-oligosaccharides showed the protozoacidal responses of 80% in 5 minutes as well as 100% in 30 minutes. These parasites were killed about 80% within one hour by 0.1%(w/v) chitosan-oligosaccharides, but did not died until 2 hours by 0.01%(w/v) chitosan-oligosaccharides. Consequently, we confirmed that the chitosan-oligosaccharides could be applied as one of protozoacidal agents against Scuticociliatids in Japanese flounders.
키토산올리고당이 주요 종자의 발아와 in vitro 유식물의 생육에 미치는 효과
안준철(Jun Chul Ahn),정영재(Young Jae Jung),김성호(Sugn Hoo Kim),김응식(Eung Sik Kim),여문환(Mun Han Yea),황백(Baik Hwang),송현철(Hyun Chul Song),유광재(Kwang Jay Yoo),김정우(Jung Woo Kim) 한국키틴키토산학회 2001 한국키틴키토산학회지 Vol.6 No.3
N/A The physiological effects of chitosan-oligomer on germination ratio, elongation ratio of seedling, and fresh weight in various kinds of vegetables (Chinese cabbage, radish, cucumber, watermelon, and melon) which are provided by domestic seed companies were investigated. Considering the effects of chitosan-oligomer on plant growth, it is concluded that chitosan-oligomer have the function of physiological activator even though there are some differences between species. The treatment concentration ranged from 0.01% to 0.05% was most effective in its physiological activation. Especially, cucumber and watermelon that are in the same taxa (Cucurbitaceas) showed a similar physiological response to chitosan-oligomer. As the results, the physiological activation of chitosan-oligomer on plants was affirmative in the domestic major vegetables as well.