• 생물정신의학
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• 제28권1호
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• pp.7-12
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• 2021

Considering that the aged population increases and the mobility problem is pointed out as a factor that indisposes the quality of life, cognition, and mood, it is important to understand and evaluate the elderly's mobility. Factors that deteriorate mobility in the elderly include physical senility, various health changes including chronic diseases, polypharmacy as well as anticholinergics. Common mobility problems in old age are reduced gait speed, increased gait variability in walking length, careless walking, and frequent falls. Several studies have reported that decreased mobility and deterioration of gait can predict cognitive decline and emotional problems. Aerobic exercise, resistance exercise, and balance exercise are suggested as therapeutic interventions for mobility problems. Active correction for factors that reduce mobility in the elderly and prescribing physical activity can conserve the elderly's quality of life and help improve cognition and mood. There is a need for related research in the future.

• Journal of Korean Biological Nursing Science
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• 제8권1호
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• pp.61-81
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• 2006

Purpose: The purpose of this study was to examine exercise program and outcome variables of exercise intervention studies from 1985 to 2004 in 9 major nursing journals in Korea. Method: From 81 articles, publishing year, research design, subjects, exercise program and outcome variables were analyzed. Results: The 57 papers(70.4%) were experimental research among 81 papers. Subjects of exercise intervention studies were demonstrated that patients were 55.6% while healthy person was 44.4%. Exercise type by the subjects which demonstrated the highest proportion was dance movement for the elderly, walking for the middle aged women and aqua exercise for the arthritis. The 40 papers(49.4%) included exercise duration, frequency and time for the exercise program which demonstrated the highest proportion. Outcome variables to determine the effect of exercise intervention were demonstrated to be physical function, physiological index, psychological and emotional variables, cardiopulmonary function, body composition, physical symptoms, variables related to exercise and behavior in order. Conclusion: Half of the exercise intervention papers included exercise duration, frequency, time and intensity for the exercise program. Frequently used outcome variables to determine the effect of exercise intervention were demonstrated to be physical function, physiological index and psychological emotional variables.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1401-1403
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• 2008

Considering that human body is continuously experiencing mechanical stimuli due to daily activities, the micro-physical environments of cells/tissues should be considered for the successful outcomes in tissue engineering and/or related researches. Obviously, there are many factors involved in cell-based researches. In this presentation, the current trends and some of outcomes are introduced. Through this studies, the roles of mechanical engineering in relation to medical/biological researches are to be emphasized.

• Fibers and Polymers
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• 제7권1호
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• pp.8-11
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• 2006

It has been reported for several decades that microbes, which naturally contaminate cotton fibres during crop growth and subsequent storage can have an adverse effect on the structural quality of cotton lint. Although several studies have analysed the relationship between numbers of Gram-negative bacteria or bacterial endotoxin and particular physical properties, these studies have been limited to cotton from the United States, and the possible effects of fungal contamination have not been examined in detail. This study quantified the Gram-negative bacteria and fungal cells, as well as measuring concentrations of bacterial endotoxin and fungal glucan, on cotton lint samples from international sources. Spearman's rank correlation coefficients calculated between these results and quality data analysed by an automated testing instrument revealed several significant correlations. Findings included inverse correlations between the biological contamination parameters and fibre elongation, micronaire and reflectance. The possible causes and implications of these findings were also discussed.

• 한국재료학회지
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• 제32권4호
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• pp.186-192
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• 2022

Collagen is one of the most widely used biological materials in medical design. Collagen extracted from marine organisms can be a good biomaterial for tissue engineering applications due to its suitable properties. In this study, collagen is extracted from fish skin of Ctenopharyngodon Idella; then, the freeze drying method is used to design a porous scaffold. The scaffolds are modified with the chemical crosslinker N-(3-Dimethylaminopropyl)-N'-ethyl carbodiimide hydrochloride (EDC) to improve some of the overall properties. The extracted collagen samples are evaluated by various analyzes including cytotoxicity test, SDS-PAGE, FTIR, DSC, SEM, biodegradability and cell culture. The results of the SDS-PAGE study demonstrate well the protein patterns of the extracted collagen. The results show that cross-linking of collagen scaffold increases denaturation temperature and degradation time. The results of cytotoxicity show that the modified scaffolds have no toxicity. The cell adhesion study also shows that epithelial cells adhere well to the scaffold. Therefore, this method of chemical modification of collagen scaffold can improve the physical and biological properties. Overall, the modified collagen scaffold can be a promising candidate for tissue engineering applications.

• Toxicological Research
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• 제33권2호
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• pp.97-106
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• 2017

Forest bathing has beneficial effects on human health via showering of forest aerosols as well as physical relaxation. Terpenes that consist of multiple isoprene units are the largest class of organic compounds produced by various plants, and one of the major components of forest aerosols. Traditionally, terpene-containing plant oil has been used to treat various diseases without knowing the exact functions or the mechanisms of action of the individual bioactive compounds. This review categorizes various terpenes easily obtained from forests according to their anti-inflammatory, anti-tumorigenic, or neuroprotective activities. Moreover, potential action mechanisms of the individual terpenes and their effects on such processes, which are described in various in vivo and in vitro systems, are discussed. In conclusion, the studies that show the biological effectiveness of terpenes support the benefits of forest bathing and propose a potential use of terpenes as chemotherapeutic agents for treating various human diseases.

• Journal of Korean Biological Nursing Science
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• 제10권2호
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• pp.141-146
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• 2008

Purpose: The objective of this study was to study the effect of the obesity control program to the extent of the overweight children's knowledge about obesity, physical exercise, dietary habits and the extent of obesity. Methods: A total of 61 elementary school children between the age of 9-12 were chosen for this study: 31 overweight children whose extent of obesity exceeded over 20% when measured using Broca index and other 30 overweight children of the same category for the comparison as a control group. The obesity control program made up of regular physical exercise for five days per week and a weekly diet education and consultation was implemented for the period of 8 weeks. Results: The knowledge about obesity, regular physical exercise, and diet habits were significantly improved after implementing the obesity control program, as compared to the control group. But the extent of obesity was not significantly decreased. Conclusion: These results suggest that the studies are needed to define factors of effective program and develop the effective program for decreasing the extent of obesity.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.380.2-380.2
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• 2016

The emergence of new infectious diseases, the resurgence of several infections that appeared to have been controlled and the increase in bacterial resistance have created the necessity for studies directed towards the development of new antimicrobials. In the present study, we have synthesized a novel antioxidant ZnO nanoparticle that is newly designed and prepared by simple surface modification process. Antioxidative functionality is provided by the immobilization of antioxidant 3-(3,4-dihydroxyphenyl)-2-propenoic acid (caffeic acid, CA) onto the surface of ZnO nanoparticles. Microstructure and physical properties of the ZnO@CA nanoparticles were investigated by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), infrared spectroscopy (IR) and steady state spectroscopic methods. Antimicrobial Activities of ZnO@CA nanoparticles were measured against various bacterial strains using antibacterial testing methods.

• Journal of Korean Biological Nursing Science
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• 제3권1호
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• pp.11-28
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• 2001

This study was to identify the levels of perceived stress, immunity cells, physical health and depression, and their relationships among those variables in the elderly who institutionalized comparing home residents. The result of this study can be used as basic data when applying nursing interventions to increase quality of life in the elderly. The questionnaires to estimate stress, health status and depression were collected through direct interview from July to August in 1999 and immunity cells were measured by venous blood specimen collected from 9 to 10 A.M. during the same period. The collected data were analysed using SAS program. The results were as follows. The score of perceived stress of all subjects was 38.49 and perceived stress score of institutionalized elderly(42.62) was significantly higher than that in home resident elderly(34.52). All immune cells tested in this study such as total T cell, helper T cell, suppressor T cell, T4/T8 ration, total B cell, and NK cell, were all under the standard criteria of cells distributions. Most elderly who institutionalized and reside home replied that their health status was not good. However their physical health activity was mostly good even though institutionalized elderly had more disability than home residents. The highest rate was 67.3% as disability due to arthritis. The score of depression in all subjects was 8.2 that indicated having depressive symptom. There was no difference in the depression level between institutionalized elderly and home resided elderly. There was a significant correlationship between physical health and depression, however, the rest of varibles did not show any significant relationships. In summary, the immune cells in the elderly who replied perceiving low level stress, was under normal range. Their health status was perceived as 'not good' but physical health activity was perceived as 'good'. The relationships of stress, immunity, physical health and depression were partially significant but not had evidence as enough as theoretically the suggested relationship. We suggest that further studies using large sample size and more diverse variables should be performed.

• Journal of Korean Biological Nursing Science
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• 제13권2호
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• pp.81-93
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• 2011

Purpose: This study was conducted to analyze the articles published in the Journal of Korean Biological Nursing Science from 1999 when it began to 2010. Methods: One hundred seventy eight articles were reviewed using analysis criteria developed by the researchers. Results: Thirty-one percent of the research was supported financially. The most used key concepts were in the health and environment domain. For study design, experimental studies were 50.56%, especially quasi-experimental design was most frequently used (22.47%). Selection of subjects by convenience sampling was most frequent (82.58%). The major subjects of study were adult patients (25.68%). Forty-eight percent of the research had verbal consent and 11% had written consent from the participants. Exercise was common intervention (27.87%) in experimental studies. Physiologic indicators (31.65%), cognitive indicator (25.38%), psychosocial indicator (13.21%) and physical indicator (7.31%) were frequently used as a measurement tool. For data analysis, descriptive statistics (28.99%), t-test (15.06%), chi-square test (11.69%) and ANOVA (9.89%) were most frequently used. Conclusion: The number of research papers published in the Journal of Korean Biological Nursing Science has increased. Research topics varied and were mostly conducted on the basis of logical positivism. Further research should be more empirical enough to be utilized in an actual nursing care context.