• 한국생물공학회:학술대회논문집
• /
• 2005.04a
• /
• pp.103-107
• /
• 2005

It has been known that the novel diterphenoids, hericenone and erinacine isolated from the fruiting body and cultured mycelia of Hericium erinaceus showed potent stimulating activity of nerve growth factor (NGF)-synthesis. To investigate the biological activities of extracts from fruiting body, cultured mycelium and cell-free broth of H. erinaceus, the activity experiments of antioxidation and AChE inhibition were carried out. Sephadex G-10 gel filtration followed by HPLC on a ${\mu}Bondapak$ $C_{18}$ column of EtOAc extract from cultured mycelium showed a biological activity.

• The Journal of Korean Society for School & Community Health Education
• /
• v.14 no.2
• /
• pp.29-45
• /
• 2013

Objectives: The purpose of this study was to identify relationships between experiential activity, ego-resilience, sense of community, and school life adjustment of middle school students and to provide the basic data that can contribute to the activation of experiential activities. Methods: 2,351 middle school students of panel survey conducted by National Youth Policy Institute were used in the final analysis. The structural equation model(SEM) was carried out to analyze structural relationships between experiential activity and ego-resilience, sense of community, and school life adjustment of the youth. IBM SPSS Statistics 20.0 and IBM SPSS AMOS 20.0. were used for the analysis of all data. Results: Experiential activities had a statistically significant positive effect on ego-resilience(p<0.001), school life adjustment(p<0.05), and the sense of community (p<0.001). Especially experiential activities acted on ego-resiliency, a sense of community, school life adjustment as an important parameter. Sense of community also showed to be an important mediating role between ego-resiliency and school life adjustment. Conclusions: In order to maximize the effectiveness of experiential activities, it is necessary to build the community networking enough to take full advantage of community resources and develop various experiential activities to meet the needs of youth and social change.

• Journal of the Korean Society of School Health
• /
• v.13 no.1
• /
• pp.97-108
• /
• 2000

This study researches an obesity index and the realities of physical activity of elementary school children and provide basic data to instruct correct physical activity for low weight and obese children. The subject was 813 Elementary School Children of grade 4-6 in Kyungju and data were collected with a Physical Activity Questionnaire from YHS, USA. The collected data were analyzed with real number, percentage, average and standard deviation techniques. The range was by SPSS WIN. Both of them were in the normal range, between -38.3 and 77.7, between low weight and obesity. The results are as follows : 1. An Obesity index according to grade and sex: the average obesity index of 423 boys was $7.56{\pm}15.7$, for girls it was $2.56{\pm}14.3$. Both of them were in the normal range, between -38.3 and 77.7. There were low weight($-38.85{\pm}0.9$) students as well as obese, including extremely low weight children ($-38.85{\pm}0.9$) and extremely obese children. 2. On the whole, in the Frequency of the 25 item physical activities breakdown, children reported to watch TV 1. ($2.7{\pm}0.6$), or do homework($2.1{\pm}0.9$), more than three-fourths of the week, male children, however, played more football($2.0{\pm}0.9$). As male obese children do less MET5, MET8(highly active activity) than male normal children, it was also discovered that low weight children do more severe activity in MET8(high activity). In female cases, it was revealed that neither do highly intense activity. 3. In physical activity, male children received higher points than female children with $92.94{\pm}37.95$ to $74.46{\pm}29.50$. On the whole, male and female obese children had lower score than normal children. 4. As for attitude toward physical activity, male children($31.96{\pm}4.37$) had a positive attitude than female children ($29.57{\pm}3.89$), but obese male children had a negative attitude regarding activity viewed as normal. Therefore, in preventing obesity in elementary school children the treating of under-weight children should be included in the obesity program so as to prevent mal-nutrition or deficiency. It is needed to instruct obese children to carry out intensive work-outs at least 3 times a week through systematic programs. It is also needed that parents and teachers educate elementary school children from an early age with information on the frequency and intensity of work-outs to prevent obesity. It is also desirable that children be educated to carry out physical activities that address their specific needs. As a result of this study, obesity management must be started from elementary school and children should be instructed to act in high-intensity actirities when they spend leisure time.

• Physical Therapy Rehabilitation Science
• /
• v.12 no.2
• /
• pp.161-166
• /
• 2023

Objective: The purpose of the study was to investigate the effect of shoe sole deformation on the muscle activity and balance of the lower extremities when standing on one foot. Design: Crossed-control group study Methods: A total of 18 healthy adults participated in this study. 9 participants with normal shoe and 9 participants with deformed in shoe out-soles (wear shoes) were included. Muscle activity of the tibialis anterior, fibularis longus and gluteus medius during one leg standing was measured using a electromyography. A balance board was used to evaluate balance ability when standing on one leg. The balance ability when standing on one leg was measured by the sway speed and distance of the center of gravity. Results: Muscle activity of the tibialis anterior, fibularis longus and gluteus medius was no significant difference between groups (P > 0.05). Balance ability when standing on one leg was significantly different from the group wearing normal shoes in all variables related to the sway distance and sway speed of the center of gravity. Conclusions: Through this study, the wear of the outer sole of the shoe indirectly confirmed the effect on the wearer's lower extremity muscle activity and balance ability when standing on one foot. These results of this study are expected to be used as basic data for future studies on shoe wear, lower extremity muscle activity and balance ability.

• Proceedings of the Ginseng society Conference
• /
• 2006.05a
• /
• pp.69-70
• /
• 2006

Purpose: Panaxadiols are more potent than panaxatriols as far as insulin secretory activity is concerned. In this study, we examined insulin secretory activity and mechanism of compound K (CK), a major intestinal bacterial metabolite of ginsenosides. Method: Insulin secretory activity of CK was examined using pancreatic beta cells and in Oral Glucose Tolerance Test assay. In addition, insulin secretory mechanism was studied in terms of calcium dependent or independent pathways. Results: In vitro, CK enhanced the insulin secretion concentration-dependently when compared to glucose-stimulated control cells. Insulin secretory mechanism of CK seems to block ATP sensitive K channels, which was confirmed by diazoxide (K channel opener) but, insulin resistance ameliorating activity of CK can't be ruled out. In vivo, CK showed hypoglycemic effect in OGTT.

• Journal of Korean Public Health Nursing
• /
• v.34 no.3
• /
• pp.380-390
• /
• 2020

Purpose: The study was undertaken to determine the socio-ecological convergence factors affecting on attempts to quit smoking in out-of-school youths. Methods: The study participants were 187 out-of-school youths enrolled Youth support Centers, collected from November 2018 to February 2019, analyzed through x2test and independent sample t-test, logistic regression analysis. Results: There was a significant differences and associated within daily smoking amounts, age of start smoking, intense physical activity, intake breakfast, smoking cessation self-efficiency, and smoking attitude among socio-ecological characteristics according to attempts of quit-smoking. Conclusion: The results of this study will be provided a basic data for developing The Quit-Smoking Intervention Program for out-of-school youth's health activities.

• Proceedings of the Korean Society of Potoscience Conference
• /
• 2002.06a
• /
• pp.47-47
• /
• 2002

• Korean Journal of Community Nutrition
• /
• v.8 no.3
• /
• pp.270-279
• /
• 2003

Middle and high school students in Korea spend a lot of time at school. In other words, many Korean teenagers spend most of their time studying, and have little time for other activities, such as physical workouts. Fewer physical activities, and consumption of many snacks, etc. may lead to overweight or obesity in some teenagers. This study was conducted to find out the activity levels of teenagers' in order to calculate their daily energy expenditures. A total of 1,192 students (461 middle school students and 731 high school students) who lives in either a city or a country area were recruited for this study. One-day Activity Diaries were collected using questionnaires and analyzed by means of SPSS /win. The participating students spent about 7 hours 24 minutes resting including sleeping; 6 hours 28 minutes studying ,4 hours 4 minutes in leisure activities , 1 hour 32 minutes in personal hygiene activities such as washing, dressing and undressing, etc., 50 minutes on transportation : and 23 minutes on household chores such as cleaning, doing the laundry, etc. The average activity factor was 1.49. That of middle school female students was the lowest at 1.47, followed by middle school male students at 1.48, high school female students at 1.49, and high school male students at 1.51. The daily energy expenditure of middle and high school male students was 2,289 kcal and 2,600 kcal, respectively. That of female students was 1,959 kcal and 2,067 kcal, respectively.

• Physical Therapy Rehabilitation Science
• /
• v.5 no.1
• /
• pp.15-21
• /
• 2016

Objective: The purpose of this study was to see the changes in muscle activity of the upper limb in persons using a smartphone. Design: Cross-sectional study. Methods: An experiment was conducted to target 15 right-handed university students. Experiments were carried out for students using cell phones for more than a year. In this study, experiments were carried out with one-handed and both handed operation of smartphone use in a sitting position, the same parameters with smartphone use in a standing position. The experiments were carried out by having the subjects write a text message in Korean on the smartphone for 3 minutes repeated 3 times with a rest period of 10 seconds given between each 3 minute period. Electromyography (EMG) was used to record the muscle activity of the upper trapezius (UT), extensor carpi radialis (ECR), and abductor pollicis (AP) during phone operation. Results: The muscle activity of the AP and ECR were significantly higher during single handed compared to double handed in both sitting and standing position (p<0.05). The muscle activity of the ECR was significantly higher in standing position compared to sitting position with double handed use of the smartphone (p<0.05). UT muscle activity of the right has been activated more than twice compared to the left UT in a sitting position (p<0.05). And UT muscle activity on the right has been activated more than five times compared to the left in a standing position (p<0.05). Conclusions: Using smartphone with double hand is useful for the prevention of musculoskeletal disorders.

• Korean Journal of Applied Biomechanics
• /
• v.29 no.3
• /
• pp.185-196
• /
• 2019

Objective: The aim of this study was to suggest correct and effective way of squat through biomechanical analysis variables on the change of the toe-out angle. Method: 7 high school male weightlifter (age: $17.57{\pm}0.53yrs$, height: $174.0{\pm}3.93cm$, weight: $81.0{\pm}9.17kg$, 1RM: $164.29{\pm}20.7kg$) participated in this study. Results: Angle of the hip joint at E2 was smaller than toe-out angle was in $20^{\circ}$ than in $0^{\circ}$ (p<.05). Angular velocity of the foot joint at E1 and E3 was quicker that in $10^{\circ}$ than in $30^{\circ}$ (p<.05). Anterior-posterior stability index was greater that toe-out angle was in $30^{\circ}$ than in $0^{\circ}$ (p<.05). In average iEMG of flexion phase, VM of right, left leg showed high activity at toe-out angle $30^{\circ}$. In average iEMG of flexion phase, extension phase and in peak iEMG, RF of right leg, VM and VL of left leg showed high activity at all of the toe-out angles. In average iEMG of flexion phase, extension phase and in peak iEMG, all of the muscles activity of right leg showed high in $10^{\circ}$ and low in $0^{\circ}$, $30^{\circ}$. Conclusion: It is judged that setting the toe-out angle $10^{\circ}$ in squat help to efficiently use muscles and ensure stability.