• Journal of Biosystems Engineering
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• 제24권5호
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• pp.439-444
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• 1999

Automated greenhouse production systems often require crop growth monitoring involving accurate quantification of plant physiological properties. Conventional methods are usually burdensome, inaccurate, and harmful to crops. A thermal image analysis system can accomplish rapid and accurate measurements of physiological-property changes of stressed crops. In this research a thermal imaging system was used to measure the leaf-temperature changes of several crops according to water deficit. Thermal images were obtained from lettuce, cucumber, pepper, and chinese cabbage plants. Results showed that there were significant differences in the temperature of stressed plants and non-stressed plants. The temperature differences between these two group of plants were 0.7 to 3$^{\circ}C$ according to species.

• 한국전문물리치료학회지
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• 제3권2호
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• pp.84-94
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• 1996

This paper reviews physiological changes in the nervous system of patients with hemiparesis that may contribute to muscle weakness. The discussion includes the important role that alterations in the physiology of motor units, notably changes in firing rates and muscle fiber atrophy, play in the manifestation of muscle weakeness. This role is compared with the lesser role that spasticity of the antagonist muscle group appears to play in determining the weakness of agonist muscles. The contribution of other factors that result in mechanical restraint of the agonist by the antagonist is discussed relative to muscle weakness in patients with hemiparesis. More studies on patients with hemiparesis are required to assess what role muscle strength training should play in rehabiliting patients after a stroke.

• The Plant Pathology Journal
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• 제38권2호
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• pp.146-158
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• 2022

Changes in physiological and biochemical patterns in lucerne plants caused by the presence of 'Candidatus Phytoplasma australasia', which is one of the significant pathogens causing yield losses in lucerne plants, were investigated. Significant differences were evident in total chlorophyll, chlorophyll a, chlorophyll b, and protein amounts between 'Ca. Phytoplasma australasia'-positive and negative lucerne plants. Stress-related metabolites such as phenol, malondialdehyde, and proline accumulations in 'Ca. Phytoplasma australasia'-positive plants were remarkably higher than those of phytoplasma-negative plants. As a response to disease attack, phytoplasma-positive plants exhibited higher antioxidant enzymes (peroxidase and catalase) and nonenzymatic metabolite responses such as jasmonic and salicylic acids. We state that partial disease responses were revealed for the first time to breed resistant lucerne lines infected by 'Ca. Phytoplasma australasia'.

• 한국주거학회논문집
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• 제17권1호
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• pp.1-8
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• 2006

The purpose of this study is to understand how visual factors of healthcare facilities would have an effect on psycho-physiological health of inpatients. First, visual factors of a ward, where inpatients mostly spend their time in a hospital, were extracted in order to find out how visual environment would affect inpatient's health. Then experimental samples were made and inpatients' reactions against them were analyzed. This study is composed of two approaches a questionnaire for psychological analysis and an electroencephalogram measurement for physiological analysis. The results of this experiment show that psycho-physiological health of subject's can be remarkably improved according to artificial arrangement of visual environment of a ward. Especially, they also show that insignificant changes of visual environment such as furnishing trees, flowerpots or framed pictures in a ward, where there is no view and completely closed, will be able to exert a range of positive effects on an subject's psycho-physiological health. In conclusion, further studies need to be delivered about indoor designs to positively bring in natural elements to a ward as well as visibility ratio of views and skylines from a ward.

• 한국작물학회지
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• 제50권1호
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• pp.39-44
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• 2005

This study was conducted to examine the physiological and biochemical responses against UV-B radiation in the seedling of 15 different rice cultivars, having the different physiological sensitivities. Out of 15 rice cultivars tested, moderate and susceptible groups showed significant decreases in biomass and RGR (relative growth rate). Contents of total chlorophyll were reduced remarkedly by irradiation of UV-B. In all rice cultivars tested, the content of chlorophyll a was strongly decreased, while the contents of chlorophyll b were slightly reduced without showing clear different among three groups and 15 cultivars. Carotenoid content was largely reduced by UV-B radiation, whereas polyamine content was moderately increased. The contents of MDA (malondialdehyde) that reflect the level of lipid peroxidation of cell membranes were clearly increased by UV-B stress, showing higher content in susceptible cultivars than moderate and torelant cultivars. The physiological important parameters highly related to visible injury were leaf color, chlorophyll, carotenoid, and lipid peroxidation, whereas biomass and polyamines were not closely correlated. Based on this results, it was concluded that changes of visible injury and the contents of chlorophyll and MDA could be adequately applied and utilized as physiological indicators to UV-B radiation.

• Fibers and Polymers
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• 제6권1호
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• pp.89-94
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• 2005

The purpose of this study is to offer acoustical database of warp knitted fabrics by investigating frictional sound properties and physiological responses according to structural parameters such as construction, lap form, and direction of mutual guide bar movement. Fabric sounds of seven warp knitted fabrics are recorded, and Zwicker's psychoacoustic param­eters - loudness(Z), sharpness(Z), roughness(Z), and fluctuation strength(Z) - are calculated. Also, physiological responses evoked by frictional sounds of warp knitted fabrics are measured such as electroencephalogram (EEG), the ratio of high fre­quency to low frequency (HF/LF), respiration rate (RESP), skin conductance level (SCL), and photoplethysmograph (PPG). In case of constructions, frictional sound of sharkskin having higher loudness(Z) and fluctuation strength(Z) increases RESP. By lap form, open lap has louder and larger fluctuating sound than closed lap, but there aren't significant difference of physi­ological responses between open lap and closed lap. In direction of mutual guide bar movement, parallel direction evokes bigger changes of beta wave than counter direction because of its loud, rough, and fluctuating sound. Fluctuation strength(Z) and roughness(Z) are defined as important factors for predicting physiological responses in construction and mutual guide bar movement, respectively.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1998년도 한국생물과학협회 학술발표대회
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• pp.265.2-265
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• 1998

No Abstract, See Full Text

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2009년 학술대회 논문집 2호
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• pp.45-48
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• 2009

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2003년도 추계 학술발표회
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• pp.45-46
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• 2003

• 한국식품과학회지
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• 제45권5호
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• pp.590-597
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• 2013

고전압 펄스 전기장 기술은 가열 공정을 대체할 수 있는 비가열 살균기술로서 꾸준한 연구가 이루어지고 있는 기술이다. 본 실험에서는 미생물의 생리적 측면에서 고전압 펄스 전기장 처리에 의한 효모의 생리적 변화를 살펴보았다. 내염성의 변화를 측정한 결과 사멸하지 않은 세포의 90-99% 이상이 세포 손상에 의해 내염성을 소실하였으며, 내염성을 회복하는데 약 4-6시간의 시간이 걸렸다. 고전압 펄스 전기장 처리 초기에는 세포 내외의 pH 구배(${\Delta}pH$)가 차이가 컸으나 처리시간이 증가함에 따라 그 차이가 감소하였다. 이는 세포의 pH 항상성을 유지시키는 $H^+$-traslocation 기능을 담당하고 있는 $H^+$-ATPase 활성이 소실되었거나 세포막 자체가 손상되어 pH 항상성을 잃어버렸기 때문으로, 이는 고전압 펄스 전기장 처리한 세포의 $H^+$-ATPase의 활성이 초기부터 크게 감소하는 것으로 확인할 수 있었다. 또한 세포의 해당활성이 고전압 펄스 전기장 처리에 의해 크게 감소하여 세포의 대사 기능이 손상되는 것을 확인하였다.