• Journal of Korean Society of Forest Science
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• v.104 no.1
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• pp.140-149
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• 2015

The aim of this study was to clarify the physiological and psychological effects of walking around and viewing a lake in a forest environment. The subjects included 11 male Japanese university students (age: $22.0{\pm}1.2$ years) who were randomly assigned to visit either a forest or an urban (control) setting. They were instructed to walk a predetermined 15-min course and to view the setting from a seated position for 15 min. Heart rate variability, heart rate, blood pressure, pulse rate, and salivary cortisol levels were measured to assess the subject's physiological responses to the environment. Four questionnaires (SD method, reports of "refreshed" feeling, POMS, and STAI) were administered to assess the subjects' psychological responses. It was found that walking around and viewing a lake in a forest environment can suppress sympathetic nerve activity, increase parasympathetic nerve activity, and decrease the heart rate, blood pressure, pulse rate, and cortisol levels. In addition, a forest environment can enhance the "comfortable," "soothing," "natural," and "refreshed" feelings, improve the mood state, and reduce anxiety. These results provide scientific evidence of the physiological and psychological effects of forest therapy.

• Science of Emotion and Sensibility
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• v.23 no.2
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• pp.13-22
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• 2020

This study aimed to investigate the association between asthma and emotions, such as depression, stress, and health awareness. We observed the effects of blood indices on asthma in Korean adults. Data from 5852 adults were taken from the 2017 Seventh Korea National Health and Nutrition Examination Survey and analyzed using a multivariate logistic regression model. The probability of asthma occurrence in over 65 years old was higher than in 19-44 years old (OR = 1.48), and asthma occurrence was high in subjects with low educational (OR = 1.89) and income (OR = 2.07) levels. With regard to marital status, singleness and divorce and dye were found to have increased the probability of asthma occurrence by 1.62- and 2.30-folds, respectively. The restriction of activities was another factor that increased with asthma occurrence (OR = 2.39). In terms of emotions, general health awareness was significantly 3.45 times increased the probability of asthma occurrence at their health bad awareness. Furthermore, depression (OR = 1.782) was shown to have increased asthma occurrence. The blood index of C-CRP 1.12 times increased the probability of asthma occurrence. The factors that influenced asthma occurrence were age, education, income, marital status, the restriction of activities, general health awareness, depression, and C-CRP. Emotional factors and blood indices are potential risk factors for the development of asthma in Korean adults. By understanding the increased risks of asthma occurrence with general characteristics and emotional factors and blood indices, the management and prevention of asthma should include the management of emotional factors.

• Korean Journal of Remote Sensing
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• v.33 no.5_1
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• pp.507-519
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• 2017

The applications of NDVI (Normalized Difference Vegetation Index) as a vegetation index has been widely used to understand vegetation biomass and physiological activities. However, NDVI is not suitable way for monitoring vegetation stress because it is less sensitive to change in physiological state than biomass. PRI (Photochemical Reflectance Index) is well developed to present physiological activities of vegetation, particularly high-light-stress condition, and it has been adopted in several satellites to be launched in the future. Thus, the understanding of PRI performance and the development of analysis method will be necessary. This study aims to interpret the characteristics of light-stress-sensitive PRI in shadow areas and to evaluate the PRI calculated by other wavelengths (i.e., 488.9 nm, 553.6 nm, 646.9 nm, and 668.4 nm) instead of 570 nm that used in original PRI. Using airborne-based hyperspectral image, we found that PRI values were increased in shadow detection due to the reduction of high light induced physiological stress. However, the qualities of both PRI and NDVI data were dramatically decreased when the shadow index (SI) exceeded the threshold (SI<25). In addition, the PRI calculated using by 553.6 nm had best correlation with original PRI. This relationship was improved by multiple regression analysis including reflectances of RED and NIR. These results will be helpful to the understanding of physiological meaning on the application of PRI.

• Journal of Life Science
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• v.1 no.1
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• pp.24-29
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• 1991

생물화학에서 취급되고 있는 대부분의 효소는 metabolic map에 나타난 대사의 각각의 단계를 촉매하는 효소로써 생물학적 혹은 생리학적인 의의가 해명되어 있다. 그러나 현재로서는 metabolic map과는 관계없는 효소로 취급되는 것도, 생물이 생명유지를 위해서는 필수적인 어떤 화학반응을 촉매하고 있는 것으로 생각되고 있다. 생체내에 존재하는 무수한 효소 중에서 개개의 특이적인 효소의 성질을 해명하기 위해서는 촉매성의 기반이 되고 있는 효소단백질의 구조라든가 성질을 검토하지 않으면 안 된다. 그렇게 하기 위해서는 될 수 있는 한 목적효소를 생체내에 존재할 때와 같은 상태로 순수하게 정제할 필요가 있다. 일반적으로 효소류는 생체내에 존재할 때는 상당히 안정하게 유지되지만, 일단 세포 외에 추출되면 생체 내에서의 생리적 조건으로부터 벗어나기 때문에 서서히 실활되는 경우가 많다. 따라서 효소의 취급에는 안정성을 고려한 세심한 주의가 필요하다.

• Sleep Medicine and Psychophysiology
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• v.16 no.2
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• pp.79-84
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• 2009

Objectives: Chronic pain is one of the most common experiences of humans and a typical psychophysiological disorder. The aim of this study was to measure the psychophysiological responses in chronic pain patients using a biofeedback system, and to compare them with the results from normal healthy subjects. Methods: Forty two patients with chronic pain (17 males and 25 females, average age $44.67{\pm}11.10$ years) and 42 normal healthy controls (17 males and 25 females, average age $45.17{\pm}10.46$ years) participated in this study. Electromyography (EMG), skin conductance (SC), and skin temperature (ST) were recorded using biofeedback system during the 3 phases (baseline, stress, and recovery) of stress reactivity test, and average values of them were calculated. Difference of values between two groups in each corresponding phase was analyzed with independent t-test, and change of values across phases of stress reactivity test was analyzed with paired t-test (all two-tailed, p<0.05). Results: Compared to normal controls, chronic pain patients had higher value of EMG (baseline: $8.10{\pm}5.97{\mu}V$ vs $4.72{\pm}1.52{\mu}V$, t=-3.56, p<0.01; stress: $11.25{\pm}6.89{\mu}V$ vs $8.49{\pm}4.78{\mu}V$, t=-2.13, p<0.05; recovery: $7.12{\pm}3.77{\mu}V$ vs $4.78{\pm}1.59{\mu}V$, t=-3.70, p<0.01) and SC (baseline: $1.06{\pm}1.0{\mu}S$ vs $0.42{\pm}0.29{\mu}S$, t=-4.0. p<0.01; stress: $1.87{\pm}2.05{\mu}S$ vs $1.03{\pm}0.86{\mu}S$, t=-2.47, p<0.05; recovery: $1.74{\pm}1.77{\mu}S$ vs $0.64{\pm}0.59{\mu}S$, t=-3.8, p<0.01) in all the 3 phases. But, skin temperature comparison did not reveal significant differences in all the 3 phases between two groups. Conclusion: Psychophysiological responses of chronic pain patients in stress reactivity test were different from those of normal healthy controls. These results suggest that sympathetic nervous system is more activated in chronic pain patients.

• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.238-239
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• 2004

• Journal of Life Science
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• v.10 no.5
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• pp.490-495
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• 2000

Effect of Quartz porphyry (QP) on clinical chmical parameters in male common finch by feeding the basal diet (Control group) containing 3.0% QP (QP group) for 14 days was studied. Body weight gain, feed intake, feed efficiency, the relative weight (mg/10 g body wight) of liver and heart were not significantly different in the both groups. However, the relative weights of kidney and gizzard in the QP group were higher and lower than in the control group, respectively. The contents of triglyceride, cholesterol, total protein, glucose and albumin, and the activity of glutamic pyruvic transaminase (GPT) in serum were not significantly different in the both groups. The activities of alkaline phosphatase (ALP) and glutamic oxaloacetic transaminase (GOT) in serum were lower and higher in the QP group than in the control group.

• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.267-272
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• 2006

The motion-graphic have been a more important factor in image illustration and typography since the development of visual culture was advanced. Therefore the visualized case of intented content with the creative typography is easily seen in television CF, movies and web pages. They suggest that variable factors such as language, time, shape, motion, color and sound should be applied and produced to motion typogaraphy. But the physiologic features as sex, age, health status, illness and physical size have an important effect in the communication process. So, the more effective result were gained than the fast-developing other mass media if these features were applied to the motion typography with semi-language speciality.

• Applied Microscopy
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• v.36 no.2
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• pp.83-91
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• 2006

The number and structure of synapses are dynamically changed in response to diverse physiological and pathological conditions. Since strength of synaptic transmission is closely related to the synaptic density on a neuron, both synaptogenesis and synapse loss may play important roles in controlling neuronal activity. Thus it is essential to estimate the number of synapses using an accurate quantitative method for better understanding of the numerical alteration of synapses under terrain experimental conditions. We applied physical disector principle to estimating the number of synapses per neuron in the dentate gyrus of adult mice. First, we measured the numerical density of granule cells using the physical disector principle. Second, the density of medial perforant path to granule cell synapses was estimated using the bidirectional physical disector. Then, the volume ratio of molecular layer to granule cell layer was measured. With these numerial values, we successfully calculated the number of synapses per neuron. Individual granule cells have approximately 6500 synapses in the dentate gyrus of adult mice $(6,545{\pm}330)$, which are comparable to those of other researchers. Our results showed that the estimation of synapse numbers per neuron using the physical disector principle would provide accurate and precise information on the numerical alteration of synapses in diverse physiological and pathological conditions. Following analyses of synapse numbers using this method will contribute to the better understanding of structural synaptic plasticity in a variety of experimental animal models.

• Science of Emotion and Sensibility
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• v.22 no.3
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• pp.21-34
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• 2019

This study was an examination of the relevance and clinical significance of electroencephalographic (EEG) indexes (e.g., mental/physical stress and attention) and indexes of heart rate variability (HRV) with regard to cognitive function and physiological health conditions in elderly people. A device was used to record two-channel EEGs of the frontal lobe and a one-channel ECG simultaneously. Subjects were 76 people average aged 73. The significant findings are as follows: First, subjects whose intrinsic alpha rhythm had high amplitude, regardless of peak, showed higher resistance to mental stress and lower physical stress than did subjects with low-amplitutde intrinsic alpha rhythm. Second, HRV, SDNN, and RMSSD indexes showed strong positive correlations between the two groups of subjects regardless of the division of groups. Third, the alpha asymmetry of the left and right sides of the brain in subjects with low-amplitude intrinsic alpha rhythm was larger, and the delta/alpha ratio (reflecting physical stress) and theta/sensorimotor rhythm (SMR) ratio (showing the decline in attention) were bigger. Fourth, the subjects in whom intrinsic alpha rhythm peak occurred during slow rhythm had a higher theta/SMR ratio than did subjects whose peak occurred during fast rhythm, which was related to a steeper decline in attention. Therefore, the presence or absence of intrinsic alpha rhythm peak and amplitude on quantitative EEG may be an index reflecting the cognitive function and physiological health of elderly people.