• The Korean Journal of Malacology
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• v.28 no.3
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• pp.215-223
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• 2012

The ecophysiological characteristics of the oyster Crassostrea gigas in Taean area, west coast of Korea, were investigated after main spawning season from September 2011 to January 2012 to confirm the recovery process of condition. The cupped oysters, from 4 different off-bottom culture areas were compared the gonad indices, histological analysis combined with measurement of RNA/DNA contents and ratios in gonad of each sex were undertaken. To evaluate the health condition of oyster after spawning, the RNA/DNA ratio in adductor muscle, fatness and condition index (CI) were used. The results showed that cupped oysters cultured in Uihang coastal area were different physiological aspects than other experiment areas, namely continuously decreasing RNA/DNA content and ratio in adductor muscle, lowest CI and fatness. Oysters cultured in Iwon Station 1 and 2 showed fast recovery in RNA/DNA, increase in fatness and CI during post-spawning stage until October rapidly and there after it decreased. Oysters in Shinduri showed rapidly decrease in fatness and CI until October. On the contrary to this factors, RNA/DNA ratio in adductor muscle increased as like protein until October. Partially spawning season could be observed until December in Shinduri and Iwon Station 1.

• Journal of Aquaculture
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• v.18 no.1
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• pp.7-12
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• 2005

This study was conducted to investigate antioxidant enzyme activity (catalase and superoxide dismutase) and Heat Shock Protein 70 (HSP70) mRNA variation in hepatopancreas of abalone (Haliotis discus hannai) cultured under several acute water temperatures. Abalones were cultured at 10, 15, 20, 25 and $30^{\circ}C$, for 0, 6, 12, 24 and 48 hours, respectively. The HSP70 mRNA expression in hepatopancreas was more increased at $30^{\circ}C$ compared to those at 10. 15, 20 (control) and $25^{\circ}C$. The superoxide dismutase (SOD) activity was increased in hepato-pancreas at all water temperature conditions compared to the control ($20^{\circ}C$). The SOD activity at high water temperature (25 and $30^{\circ}C$) tended to be increased after 12 hours, and was increased immediately after exposure to low water temperature (10 and $15^{\circ}C$). and then was recovered to starting level after the increase. Also, catalase (CAT) activity in hepatopancreas was increased in all the groups except for at $10^{\circ}C$ than the control ($20^{\circ}C$). Survival rate of abalone was $100\%$ at 10, 15, 20 and $25^{\circ}C$, but $92\%$ at $30^{\circ}C$. Thus, according to our study, when abalone is appeared at $20^{\circ}C$, defense mechanism against stress at low water temperature can be accelerated to be stabilized at about $5^{\circ}C$. In the case of exposure of abalone to high water temperature, antioxidant enzyme and HSP70 expression were increased due to elevated physiological stimulation factor, such as temperature.

• Journal of Life Science
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• v.19 no.10
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• pp.1374-1381
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• 2009

This study was designed to investigate the differences of physiological variables by age group in alcohol-consuming men. The thirty year old-age group had the lowest waist-hip ratio (WHR), right and left cardio-ankle vascular index (R-CAVI and L-CAVI), right and left ankle-brachial index (R-ABI and L-ABI), amylase, high sensitivity C-reactive protein (hs-CRP), and creatine phosphokinase (CPK) levels, and the highest body weight (BW), interleukin-6 (IL-6), right and left intraocular pressure (R-IP and L-IP), hematocrit (Hct), hemoglobin (Hb), erythrocyte, red blood cells distribution width (RDW), alanine aminotransferase (ALT), total cholesterol (TCH), triglyceride (TG), and ferritin levels. The forty year old-age group was the highest in hs CRp and CPK levels, but the lowest in ferritin level. The fifty year old-age group possessed the highest WHR, diastolic blood pressure (DBP), R- and L-ABI, eosinophil, and amylase levels. The sixty year old-age group had the highest R- and L-CAVI, mean corpuscular volume (MCV), ALP, $\gamma$-glutamyltranspeptidase ($\gamma$-GTP), rheumatoid factor (RF), $\alpha$-fetoprotein (AFP) and prostate specific antigen (PSA) levels and the lowest BW, DBP, R-IP, L-IP, Hct, Hb, leukocyte, platelet, RDW, eosinophil, monocyte, ALT, amylase, TG, and CPK levels. These findings indicate that there may be differences of physiological variables depending on age group in alcohol-consuming men. Further studies should be focused on the physiological differences between alcohol-consuming men and women.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1993.04a
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• pp.158-158
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• 1993

노화현상에 따른 여러 가지 병태생리조건의 형성과 난치성 성인병질환의 발병 및 진행과정에 활성산소류들과 이들에 의해 유도되어지는 free radical이 관여하고 있다는 증거가 여러연구진에 의해서 보고되어지고 있다. 산소를 이용하여 생명현상을 이어가는 생물체들은 필연적으로 활성산소들을 생성하는 생화학적 산화반응기구를 효율적으로 활용하면서 항상성을 유지시키고 있다. 그러므로 활성산소의 생성과 분해과정의 평형유지는 생물학적으로 대단히 중요한 의미를 갖고 있다. 임상적으로 alcohol은 질병의 악화 내지는 질환의 발병조건을 조성하는 병태생리기구에 기여할 것으로 생각되어 대부분의 환자에게 금주시키고 있으나 그 작용기전에 대해서는 충분히 설명되지 못하고 있다. 본 연구에서는 alcohol을 급ㆍ만성으로 실험동물에 투여하고 생체에서 활성산소 생성에 중요한 역할을 하는 xanthine oxidase와 aldehyde oxidase의 활성변화를 관찰하면서 전자의 형전환속도와 과산화지질 생성속도와의 상관성을 중점 비교 관찰하므로서 alcohol성 간손상 실험 model을 계획하였다. 간 및 신장조직에서 alcohol에 유래되는 활성산소의 생성계에 관여하는 효소 활성의 변화와 조직의 과산화지질 생성반응 속도는 alcohol의 투여방법, 기간, 시간(diurnal variation), 나이 및 암수에 따라 다르게 나타남을 관찰할 수 있었다.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.890-893
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• 2010

알코올 섭취 후 발생하는 해부생리학적 변화가 눈의 일시적인 근시화에 미치는 영향을 알아보고자 하였다. 평균 24.5${\pm}$1.5세의 남자 8명(16 안)을 대상으로 0.42 g/kg의 알코올을 30분 간에 걸쳐 섭취토록 한 다음, 알코올 섭취 1시간, 4시간, 24시간 후의 교정굴절력, 각막곡률반경과 두께, 동공직경, 안압, 그리고 안구축의 길이변화를 측정하여 알코올 섭취 전과 비교하였다. 알코올 섭취 1시간 후에 알코올 섭취 전과 비교하여 호흡 중 알코올 농도가 가장 높았고(p<0.001), 교정굴절력의 구면 (-)굴절력 증가(p<0.05), 동공 크기의 감소(p<0.05), 안압의 하강(p<0.001), 그리고 안구축의 길이 증가가 나타났다. 알코올 섭취 4시간 후에도 모든 측정값들이 섭취 1시간 후와 동일한 경향이었다. 그러나 알코올 섭취 24시간 후에는 알코올 섭취 전과 비교하여 의의있는 변화를 보이지 않았다. 알코올 섭취로 인한 일시적인 근시화는 안압하강과 안구축의 길이변화와 관련성이 있을 것으로 판단된다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.433-434
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• 2002

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.05a
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• pp.54-59
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• 2001

본 연구는 청각적 감성을 만족시키는 의류소재의 개발을 위해, 직물 마찰음에 대한 인간의 감서을 생리반응측정과 심리적·주관적 평가를 통해 파악하고, 직물 마찰음이 갖는 음향특성과의 관련성을 고찰하였다. 이를 위해 직물 마찰음의 음향특성을 분석하고, 직물 마찰음에 대한 감각·감성 표현어(부드러움, 시끄러움, 유쾌함, 날카로움, 맑음, 거침, 높음)를 이용하여 주관적 평가를 실시하였으며, 생리적 반응으로서의 뇌파 및 혈류량, 심박변화율, 피부전도수준 등을 측정하였다. 주관적 감각·감성은 대부분 직물 소리의 크기와 관련이 깊은 것으로 나타나, loudness(Z)와 총음압 LPT가 증가할수록 시끄럽고 거칠며 딱딱하고 불쾌하며 탁하다고 지각하였다. 생리적 반응과 관련하여서는, 부드럽고 조용하며 맑다고 지각할수록 slow alpha파가 증가하였고, 유쾌하고 매끄럽다고 평가할수록 혈류량은 증가하였다. 또한, 높다고 지각하는 소리에 대한 LF/HF는 증가하였다. 마찰음의 음향특성이 생리적 반응에 미치는 영향으로서, LPT가 혈류량의 감소에, Loudness(Z)가 피부전도수준의 증가에 각각 영향을 미치며, sharpness(Z)가 높고 ΔL이 작을수록 LF/HF는 증가하는 것으로 나타났다.

• Korean Journal of Microbiology
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• v.30 no.3
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• pp.193-198
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• 1992

Environmental parameters and physiological characteristics of heterotrophic bacterial isolates were compared by factor analysis to investigate the influences of river barrage construction on the ecosystem of Naktong River Estuary. Aftcr the construction of river barrage, the influence of seawater was no longer significant. ant1 the influences of nutrients loading were increased from 50.7% to 77.1% of the environmental variances before and after the construction, respectively. The interpretations of features of bacterial physiological characteristics were closely related to environmental parameters as the results of factor analysis. But. differing from the environmental variances. it was found that the halophilic feature was the third factor of bacterial characteristics after the construction of river barrage. This suggests that the stability of Naktong estuarine ecosystem and heterotrophic bacterial characteristics are not established till now.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.852-855
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• 2010

Based on the rapid development of the computer network technology, the ubiquitous sensor network (USN) was developed to enable us to have access to the communication environment anywhere and anytime without the need for recognizing computers or networks. Moreover, with the increasingly high interest on individual health, the USN technology is being applied to diverse sectors for healthcare and disease prevention. In this paper, a system was designed and implemented using the USN-based RF communication for doctors and nurses who care patients in the hospital to easily measure and control the physiological data on blood pressure and blood sugar. In addition, a database was designed using MS SQL database to store and manage the blood pressure and blood sugar data, which were passively or actively measured from patients. Using the results of this study, the physiological data of patients can be managed in real time and emergency situation can be instantly addressed. It is expected that the healthcare service can be improved and the paradigm of healthcare service environment can be changed.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.13 no.6
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• pp.477-482
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• 2020

The human visual cortex has the characteristic that reacts sensitively to stimuli with special directional or temporal frequency changes while it is insensitive to selective stimuli of spatial phases. In this paper we implemented the model of complex cell using an image estimation iterative algorithm by Gabor wavelet transform. The performance of implemented model evaluated the consistency between the physiological experimental results in related papers. The implemented model is limited in the complete model of the receptive field in the retina where simple cells and complex cells are distributed together. But the implemented model express the reaction of the complex cells from the point of view of the detection of corners and edges.