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악취 Sampling Bag의 황 화합물질 안정성 연구
최윤호 ( Yun-ho Choi ),이종길 ( Jong-gil Yi ),장은아 ( Eun-ah Jang ),김종보 ( Jong-bo Kim ),서인숙 ( In-sook Seo ),배용수 ( Yong-soo Bae ),김태화 ( Tae-hwa Kim ),김종수 ( Jong-su Kim ) 한국환경분석학회 2017 환경분석과 독성보건 Vol.20 No.3
In this study, stability of 4 sulfur compounds (H<sub>2</sub>S, CH<sub>3</sub>SH, DMS, and DMDS) was investigated for up to 96 h (at 6, 12, 24, 48, 72, and 96 h time points). For these experiments, each sulfur standard was prepared at 10 nmol/mol in a 10 L sampling bag (Teldlar bag). To investigate the stability of the sulfur compounds, regression analysis was applied to the data obtained by the concentration reduction over time at the 95% confidence level. According to regression analysis, the concentration of sulfur compounds in 48 h had statistically significant difference (P-value < 0.05) from stability of 4 sulfur compounds (H<sub>2</sub>S, CH<sub>3</sub>SH, DMS, and DMDS). The results also indicated that the heavy sulfur compounds (DMS and DMDS) tend to show more rapid concentration reduction than lighter sulfur compounds (H<sub>2</sub>S and CH<sub>3</sub>SH). This study can be used to improve the reliability of analysis by judging quantitative concentrations of sulfur compounds when controlling odor-polluted areas.
秋健二,李鍾吉 仁荷大學校 스포츠科學硏究所 1991 論文集 Vol.3 No.-
This study is to find out influence on the physical fitness by reducing body weight. The 24 subjects selected were Judo players attending Pyung Taek Boy's High School. The processes of degree about reducing body weight are 2%, 2.5%, 2.9%, 3.3%, 4.2%, of one's normal body weight. The method used was to reduce and increas the exorcises. The objects used for physical fitness test tore gripping power, pull-ups, vertical jump, 1,000m running, sit-ups and flexibility of waist. The influences on the physical fitness by gradual degree of reducing body weight were as follows. 1) The record of gripping power went down when one reduced his weight by 2.5% . 2) The record of pull-ups went up when one reduced his weight by 2% and 2.5%, and went down when one reduced his weight by 3.3%. 3) The record of vertical jump went up when one reduced his weight by 2%, and went down hen one reduced by 2.9% 4) The record if 100m running showed no difference until one reduced his weight by 4.2% 5) The record of 1,OOOm running went down when one reduced his weight by 2.5% . 6) The record of sit- ups went down when one reduced ruts weight by 2.9% . 7) The record of waist flexibility went up when one reduced his weight from 2.5% to 4.2%.