• 한국식품저장유통학회지
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• 제3권2호
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• pp.187-193
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• 1996

To investigate the antimicrobial activities and effect of grapefruit seed extract(GFSE) on the physiological function of microorganism, antimicrobial activity, fatty acids of bacterial cell lipid and amino acids of bacterial cell protein were measured. The change of cell morphotype was observed by transmission electron microscope. GFSE was very stable on the wide range temperture and pH. The growth rate of E. coli and B. suvtilis were decreased above 40ppm GFSE There fore, minimum inhibitory concentration (MIC) of the E. coli and B. subtilis to GFSE were determined around 40ppm. In the change of fatty acids quantities, hexadecanoate was significantly decreased on the treatment compared with control in case of E. coli, whereas tridecanoate was not detected in case of B. subtilis. In the change of amino acids quantities, alanine, glutamic acid, glycine, lysine were decreased on the treatment compared with control in case of E. coli and B. subtilis Transmission electron microsgraphs(TEM) showed the microbial cells were destroyed by GFSE.

• 한국양식학회지
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• 제16권1호
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• pp.31-36
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• 2003

사육 염분의 급성교환 실험에서, 해수의 담수화가 1시간 이내에 이루어졌을 경우 농어, 유어들은 다소의 스트레스 반응과 이온의 변화가 있었으며. 24시간 뒤에도 정상 회복이 더딘 것으로 나타났다. 그러나 5시간에 걸친 담수화 과정 중에 스트레스 반응은 담수화 직후 높게 나타났지만, 24시간 후 빠르게 정상으로 회복되는 것을 알 수 있다. 장기간 염분별 사육실험 결과, 20 ppt가 가장 높은 사료섭식량을 나타내었고, 2 ppt구가 가장 낮았다. 사료효율 또한 2 ppt구이 가장 낮게 나타났고, 10 ppt구가 가장 높았으며, 실험구별 유어의 성장은 실험 종료시 10, 20 및 30 ppt구가 2 ppt보다 유의하게 높은 길이 성장을 보였다. 무게 성장은 실험 종료시 20 ppt가 가장 빠른 무게 성장을 나타내었고, 다음으로 30 ppt, 10 ppt. 2 ppt순으로 나타났다. 염분별 사육유어의 혈액 성상은 2 ppt~30 ppt 사육수에 있어 농어 유어들의 혈액 조성은 큰 차이가 없는 것으로 나타났다.

• 임상간호연구
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• 제20권1호
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• pp.134-145
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• 2014

Purpose: The purpose of this study was to develop and apply a video dietary instruction program for hemodialysis patients to understand dietary compliance as well as the effect on the physiological indicator. Methods: This is a quasi-experimental study of a nonequivalent control group pre-post test design. Data were collected from August 6, 2012 to January 10, 2013. Twenty patients were assigned to an experimental group and twenty-one patients were assigned to a control group. A video dietary instruction program was developed and applied only to the experimental group once a week for a total of 8 weeks. Dietary compliance and physiological indicators were subsequently measured. Results: Dietary compliance was improved in both groups over time. There was no significant change in the physiological indicator value in both groups, indicating that there was no correlation between the treatment type and time. Conclusion: The video dietary instruction program could not make a statistically significant change on the physiological indicator value of the experimental group; however, this change was maintained within the allowable limits. Therefore, the video dietary instruction program can be utilized continuously as a standardized nursing intervention program in order to maintain the dietary compliance of hemodialysis patients.

• 한국환경복원기술학회지
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• 제14권2호
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• pp.47-57
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• 2011

This study monitored forest plant species vulnerable to climate change in Jiri Mountain, one of Korea's representative alpine regions, in order to securely preserve plant genetic resources susceptible to climate change and to utilize the results as basic data for bioclimatology prediction and management on a long-term basis. A majority of indicator plants tended to blossom one week to one month later in 2010 than in 2009. As with the blooming dates, the falling dates of blossoms became later in most species, with the exception for Weigela florida and Oplopanax elatus. Leaf bursting as well fell on later dates in a majority of species excluding Carpinus laxiflora and Cupressus sempervirens, displaying the most obvious differences among the data of analysis of the 2009-2010 physiological cycle changes. It is believed that was due to the fact that temperatures in February, March and April, which affect plants' blossoming and leaf bursting, were lower in 2010 than in 2009 and that cold temperatures in the winter lasted for a longer period in 2010 than in 2009. The dates of leaves being changed to red were similar in 2009 and 2010 by being or later or earlier by several weeks in 2010 than in 2009 without any regularity. Most species' leaves began to fall at similar dates in 2009 and 2010 or at later dates by one to two weeks in 2010 than in 2009. The temperature differences in late 2009 and late 2010 were not so large, resulting in similar dates of falling leaves, and gaps in several indicator plants' physiological cycles without any regularity can be attributed to each individual plant's physiological and environmental characteristics.

• BMB Reports
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• 제39권2호
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• pp.167-170
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• 2006

Bovine adenosine deaminase undergoes a nondenaturational conformational change at $29^{\circ}C$ upon heating which is characterized by a large increase in heat capacity. We have determined the transition state thermodynamics of the conformational change using a novel application of differential scanning calorimetry (DSC) which employs very slow scan rates. DSC scans at the conventional, and arbitrary, scan rate of $1^{\circ}C/min$ show no evidence of the transition. Scan rates from 0.030 to $0.20^{\circ}C/min$ reveal the transition indicating it is under kinetic control. The transition temperature $T_t$ and the transition temperature interval ${\Delta}T$ increase with scan rate. A first order rate constant $k_1$ is calculated at each $T_t$ from $k_1\;=\;r_{scan}/{\Delta}T$, where $r_{scan}$ is the scan rate, and an Arrhenius plot is constructed. Standard transition state analysis reveals an activation free energy ${\Delta}G^{\neq}$ of 88.1 kJ/mole and suggests that the conformational change has an unfolding quality that appears to be on the direct path to the physiological-temperature conformer.

• 감성과학
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• 제4권1호
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• pp.23-31
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• 2001

Psychological and physiological effects from simulator sickness could be an important bias factor for sensibility evaluation. The present experiment investigated the effects of simulator sickness on sensibility evaluation in the controlled condition of driving a car for 60 minutes on a constant speed (60km/h) in graphic simulator. The simulator sickness was measured and analysed for every five minutes using their subjective evaluation and physiological signals. Results of the subjective evaluation showed that there was significant difference between rest and driving condition at 10 minutes from the start of driving, and the level of difference was increased linearly with time. The analysis on central and autonomic nervous systems showed the significant difference between rest and driving conditions after 5 minutes from the start of the driving on the parameters $\alpha$/total and $\beta$/total, and increased level of sympathetic nervous system. But there was no significant difference between different time conditions. The results indicates that physiological changes from simulator sickness can be a bias factor in objective evaluation of human sensibility which also, uses physiological signals. That is, the changes on the parameter $\alpha$/total and $\beta$/total, and on activation level of sympathetic nervous system from simulator sickness can be a bias factor for evaluation of the level of pleasantness and tension. Therefore the effort on improving the analysis by minimizing or eliminating the bias factors should be done for better and accurate sensibility evaluation in simulator environments.

• 한국환경농학회지
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• 제33권4호
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• pp.364-371
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• 2014

양파의 인경 비대기인 3-5월에 급변 온도조건을 유도시켜 양파의 생육반응과 수량을 조사하였다. 시험품종은 중만생종인 선샤인을 2012년 9월 4일에 파종하여 10월 30일에 정식하였고 다음해 5월 30일에 수확하였다. 온도변화에 따른 처리구는 3-4-5월 평균온도(T0 대조구: $6.0-10.4-17.2^{\circ}C$, T1: $6.0-5.4(-5)-17.2^{\circ}C$, T2: $6.0-10.4-22.2(+5)^{\circ}C$, T3: $6.0-5.4(-5)-22.2(+5)^{\circ}C$)를 기준으로 4월과 5월에 ${\pm}5^{\circ}C$씩 온도차를 두었다. 그 결과, T2처리구가 T0 대조구에 비하여 양파 생육과 구의 수량이 증가하였으나 저온처리구인 T1에서는 감소하였다. 무기이온 함량에서는 3월보다는 5월에 다량원소의 감소가 있었고 고온보다 저온에서 함유량이 높았다. 호르몬의 변화는 구의 비대시기와 밀접하게 관련이 있었으며 ABA 함량의 증가는 구의 비대를 촉진하였다. 따라서 급변온도에 대한 비대기 양파의 생육과 수량은 고온보다는 저온기간이 길어질수록 수량지수가 감소됨을 확인하였다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2001년도 춘계학술대회 논문집
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• pp.121-124
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• 2001

Using ordors with the different concentration of essential oils, e studied the effect of a pleasant olfactory stimulation on physiological responses. we examined psychological response, mental task and changes in cardiac, immunity and EEG in responses to 150times solution (feel easily) and 500times solution (feel with difficulty) which of essential oil (called PCK) were diluted in propylene glycol, and neutral (water). The 150times solution that was felt pleasant produced significant differences (p<0.05) in relative power change of beta activity in the left frontal region (Fp1, F3, F7) of the brain, and heart rate (HR) deceleration after mental task. these results are consistent with substantial research that has documented cardiac and EEG responses to pleasant stimuli. What is more, 150times solution increased the concentration of s-IgA know as an index of immunity.

• 한국작물학회지
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• 제25권4호
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• pp.1-9
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• 1980

To determine the optimum harvest time of recent rice varieties from Indica/Japonica remote crosses, leading varieties Suweon 264 and Milyang 23 were tested for the changes in dry matter weight and moisture content of grain, shattering, shelling ratio, milling ratio, and apparant physical quality during grain development at 5 day-intervals from 20 days to 55 days after heading. The results are summarized as follows: 1. Grain weight (dry matter) reached its maximum (physiological maturity) at 30 days after flowering (DAF) in Suweon 264, and at 35 days in Milyang 23, and thereafter it did not change significantly until 55 DAF. 2. Time course of decrease in grain moisture content (Y, %) during maturation (X, DAF) consisted of two linear phases, i.e. a fast and a slow period: Y=68.245-1.33X until 34DAF, and Y=23.025-0.470X until 55DAF after 34DAF in Suweon 264; Y=73.62-1.634X until 24.5DAF, and Y=33.59-0.570X until 55DAF after 24.5DAF in Milyang 23. Two varieties showed the same grain moisture content of 28% (wet basis) at physiological maturity in spite of the distinct differences in the heading date, time of physiological maturity and thereby ripening climate. 3. Force to shatter a grain ranged about 90 to 100g in Milyang 23, and about 200 to 250g in Suweon 264 and in a Japonica variety, Jinheung. The force, however, did not change significantly with harvest time from 35DAF to 50DAF. 4. The changes in the ratios of shelling, milling, broken rice and tinted rice with harvest time were insignificant during a period from 35DAF to 55DAF. However, ratios of green rice and white belly rice decreased significantly with delay in harvest time during 10 days after physiological maturity. 5. The best time of harvest for maximum yield and good quality is thought to be 10 days after physiological maturity, and grain moisture content at this time was about 20% on wet basis.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1995년도 춘계학술대회논문집
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• pp.187-198
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• 1995

The physiological change of eyes while viewing 3D TV was investigated. The change of pupil size was used as the measure of evaluation. The results are as follows: (1) The pupil size decreases after viewing 3D images. (2) The indoor illumination has a significant effect on the pupil size in both 2D and 3D cases. (3) Less change of pupil size were observed under the indoor illumination. Thus, if we only focus on the visual load on the eye, for viewing 3D images, it will be better to use indoor illumination.