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減壓處理가 토마토 果實의 Polygalacturonase 및 Cellulase의 活性變化에 미치는 影響
孫泰華,安鍾雄 慶北大學校 1980 論文集 Vol.30 No.-
Mature green tomato fruits grown at field were harvested on July 9. 1979. They were stored at 25℃ in 10-liter vacuum desiccators. The experiment for subatmospheric pressure treatment was carried out at 380 Torr while that for control was performed at 760 Torr. The purpose of this paper was to determine effects of subatmospheric pressure storage on the respiration, ripening behavior, firmness, and the activities of enzymes related to firmness of tomato fruits. Tamato fruits were, as expected, found to exhibit a sudden rise (the climacteric rise) in respiratory activity. The respiration rate of tomatoes stored at 380 Torr was decreased considerably as compared with that of controls. The ripening of the fruits was retarded and the storage life extended by subatmospheric pressure. Tomatoes for control experiment were ripened in 30days of storage at 25℃, but those stored at 380Torr were in pink or red stage. Polygalacturonase(PG) activity increased as maturity progressed. The increase rate of the PG activity was greater at the early red stage than other stages. The maximum reached at the time when the friuts commenced softening (red-ripe stage), but Cellulase activity was increased for 12days of sgorage, and decreased therafter. PG activity was inhibited significantly by subatmospheric treatment. In the case of cellulase, the enzyme activity of tomatoes stored at 380Torr was not significantly different from that of controls.
최선화,안열,오종민 경희대학교 2005 環境硏究 論文集 Vol.14 No.-
This study was carried out to evaluate of water purification in oxidation pond with filaments algae mat. It is the water treatment process in the small rural streams to remove the organic materials and nutrients. We used the filaments algae mat(FAM) which selectively predominate to prevent the additional contamination by algae outflow. The removal efficiencies of COD, SS, T-N and T-P in oxidation pond with filaments algae mat were -2.5%, 84.7%, 63.9% and 89.2%, respectively. The removal efficiencies of T-N and T-P which are nutrients index were high. Results of this study would help us to determine the possibility of using the water treatment on the contaminated small rural streams.
一部 樂器의 演奏音에 의한 暴露歷이 聽力에 미치는 影響
박종안,장봉기,이종화,안규동,이영세 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1
This study was carried out to evaluate the effect of playing musical instruments on hearing threshold level from May to October, in 1997. Pure tone audiometric tests was provided to musical instruments playing group of total 117 subjects(Samullnori; 35, military band; 25, symphony orchestra; 46, piano; 11), and reference group of total 7,477 subjects, selected after excluding workers with history of ear disease, of ototoxic drug administration, of noise induced hearing loss at workplace in Pohang industrial area. In addition, noise exposure levels of musical instrument players were assessed by noise dosimetry(exchange rate; 5dB, threshold level; 80dB, criterion level; 90dB), and produced age-adjusted hearing threshold level(=hearing threshold level of musical instrument player - hearing threshold level in same age of normal population group). The age-adjusted hearing threshold levels were analyzed by musician's career. The results were as follows; 1. The hearing threshold level of reference group was revealed more increased as within 4.98dB to 6.89dB at 1 KHz and within 5.26dB to 14.46dB at 4 KHz by ages than "the Standard of Age-adjusted Hearing Loss by Frequency(OSHA)" used for special health examination in the Ministry of Labour. 2. Equivalent continuous sound exposure level (Leq) by the group of instrumentalist was as following; within 104.95 to 112.62dB in samullnori, the highest, within 100.18 to 103.49dB in military band, within 77.00 to 82.74dB in symphony orchestra and 81.54dB in piano, the lowest. Playing maximum sound level by each musical instrument was as following; 122.8dB in Kkwaenggwari, the highest, 122.7dB in Changgo, 121.8dB in Alto saxophone, 115.5dB in Trumpet, 119.2dB in Horn, 112.8dB in Pungmul Buk and Ching, 112.5dB in Clarinet. 3. Average age-adjusted hearing threshold levels of instrumentalists were -0.65±6.38dB in left ear, -0.92±6.59dB in right ear at 1 KHz, and -1.14±12.88dB in left ear, -1.53±12.77dB at 4 KHz, which were better than normal, but the average age-adjusted hearing threshold levels of Samullnori players were 1.23±5.22dB in left ear, 1.94±6.91dB in right ear at 1KHz, and 8.40±15.75dB in left ear. 7.13±14.97dB in right ear at 4KHz, which were worse than normal. 4. Hearing threshold level in Samullnori players was increased with their career at 4 KHz, especially it increased rapidly when the musicians had played over 10years. It showed that there was a significant relationship between hearing threshold level and the career (P<0.01).
이병국,황규윤,장봉기,김용배,리갑수,안현철,김화성,이성수,안규동,박종범 순천향대학교 산업의학연구소 1999 순천향산업의학 Vol.5 No.1
The inhibition of δ-aminolevulinic acid dehydratase (ALAD) in the heme synthetic pathway results in increased protophoryphyrin (ZPP) and δ-aminolevulinic acid (ALA) and is responsible for some of toxicological effects of lead. This enzyme is coded by the ALAD gene containing 2 co-dominant alleles. The polymorphisms of ALAD gene may be related to differential effects of lead on ZPP and ALA, ALAD genotype was measured in 975 Korean male lead workers, of whom 897 were homozygous for ALAD1 (ALAD 1-1 genotype) and 96 were heterozygous for ALAD2 (ALAD 1-2 genotype). Blood lead in subjects with ALAD1 was significantly higher than those with ALAD2 (p = 0.01). No difference between ALAD genotypes was found for age, exposure duration, ZPP, ALA, hemoglobin, hematocrit, body mass index, tobacco and alcohol use. After adjustment for possible confounders, ALA and ZPP became significantly elevated in ALAD1 subjects (p = 0.004 and 0.055, respectively). This result suggests that ALAD1 subjects may be more susceptible to the hematotoxicologic effects of lead than ALAD2 subjects.
김용배,장원기,황보영,김화성,안규동,이병국,이용진,이종은,이준숙,이찬구,이한정,이성수 순천향대학교 2006 Journal of Soonchunhyang Medical Science Vol.12 No.1
Objective : Serum uric acid has now been identified as a marker for a number of metabolic and hemodynamic abnormalities. The aim of this study is to evaluate risk factors which influence hyperuricemia in the citizens of Asan. Method : The study design was cross-sectional and research subjects were 1086 citizens of Asan. General characteristics, cigarette smoking, alcohol consumption, and past history were obtained by interview using a structural questionnaire. Also, we measured height, weight and blood pressure, and serum uric acid of the subjects. Results : The mean serum uric acid level was 5.27 ㎎/㎗ in men and 4.01 ㎎/㎗, in women, In the multiple logistic regression analysis, statically significant risk factors of hyperuhcemia were gender, body mass index, blood lead concentration, and serum creatinine. Conclusion : Our results suggest that gender, body mass index, blood lead concentration, and serum creatinine might be the most important risk factors of hyperurcemia. Education program as well as routine check-up for serum uric acid was highly recommended for the effective prevention of hyperuricemia.
안종화(Jong Hwa Ahn),남광현(Kwang Hyun Nam),민경석(Kyung Sok Min) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.3
This study was undertaken to investigate the nutrient removal efficiencies and the operating parameters for the treatment of low strength municipal wastewater containing nightsoil by using laboratory scale Anaerobic-Anoxic-Oxic process. The average removal efficiencies of COD, BOD and SS were 88%, 92%, and 91% respectively. It could be suggested by this study that about 4hr HRT of oxic reactor is required for the complete nitrification and at least 3hr HRT of anoxic reactor is required for 50∼60% nitrogen removal efficiencies. It was also found that 1hr HRT of anaerobic reactor is enough to release orthophosphorus from the cell into solution.
융모양막염과 관련되어 발생한 뇌실주위 백질 연화증 1 예
김종화(Jong Hwa Kim),신종승(Jong Seung Shin),안영선(Young Sun Ahn),서경(Kyung Seo),박성록(Sung Rok Park) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.8
Periventricular leukomalacia is a major cause of neuro-developmental delay in premature infant. Although it develops in only a small percentage of preterm infants, the condition poses a major problem. The pathogenesis of periventricular leukomalacia is not well established. Because of the topography of the lesion, a decreased cerebral perfusion occurred before delivery is thought to be a critical pathogenetic factor. Therefore, hypoxic brain damage is thought to be a major cause of periventricular leukomalacia. The importance of neurochemically mediated injury to the white matter has been stressed, Recently, high incidence of placental chorioamnionitis with periventricular leukomalacia. We experienced a case of periventricular leukomalacia related to chorioamnionitis. The pathology of placenta was chorioamniontis, and it was thought to be a cause of periventricular leukomalacia. So, we report our case with a short literature review to ensuring that chorioamionitis without perinatal asphyxia cause a periventricular leukomalacia.