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전주지역 가족의 외식행태와 주부의 저염식관리와의 관계연구
송형은,이소영,노정옥,Song, Hyungeun,Lee, Soyoung,Rho, Jeongok 한국식생활문화학회 2018 韓國食生活文化學會誌 Vol.33 No.2
This study examined the relationship between the eating out behavior of families and a low-salt management by housewives in Jeonju area. Self-administered questionnaires were collected from 420 housewives. Descriptive statistical analyses was completed using SPSS v. 19.0 and Stata 13.0. The frequency of eating out and delivered food of housewives in their 20s was significantly higher than that of the older housewives (p<0.001). The high order frequency delivered foods were chicken menu and Chinese food. The determinants of the eating out menu were children's preference and meal time. The average scores of 'interest on low-salt diet', 'attitude toward a low-salt purchasing', and 'praxis a low-salt diet' were $2.70{\pm}0.95$, $3.06{\pm}1.13$, and $3.26{\pm}0.91$, respectively. The level of a low-salt management housewives in their 20s was higher than that of the older housewives (p<0.001). Regression analysis showed that various factors (e.g. age, number of children, education level, and frequency of the eating out) correlated with the low-salt diet of subjects. For the adequate eating out behavior of families and low-salt management of housewives, information and consumer education to take family-related situations into consideration are necessary.
송형의,김진욱 한국환경보건학회 1998 한국환경보건학회지 Vol.24 No.3
20 bacterial strains capable of growing on phenol minimal medium were isolated from soil and wastewater by the enrichment culture technique, and among them, one isolate which was the best in the cell growth was selected and identified as Bacillus sp. SH3 by its characteristics. Strain SH3 could grow with phenol as the sole carbon source up to 15 mM, but did not grow in minimal medium containing above 20 mM of phenol. The optimal conditions of temperature and initial pH for growth and phenol degradation were 30$^{\circ}$C and 7.5, respectively. This strain could grow on various aromatic compounds such as catechol, protocatechuic acid, gentisic acid, o-, m-, p-cresol, benzoic acid, p-hydroxybenzoic acid, anthranilic acid, phenyl acetate and pentachlorophenol, and the growth-limiting log P value of strain SH3 on organic solvents was 3.1. In batch culture, strain SH3 degraded 97% of 10 mM phenol in 48 hours. In continuous culture under the conditions of 20 mM of influent phenol concentration and 0.050 hr$^{-1}$ of dilution rate, the treatment rate of phenol was 94%.
카드뮴 내성효모의 카드뮴축적에 미치는 계면활성제의 영향
송형의 한국환경보건학회 1996 한국환경보건학회지 Vol.22 No.2
Cadmium uptake by growing and nongrowing (intact) cells of a chdmium-tolerant yeast Hansenula anomala B-7 in the presence of surfactants was studied. In growing cultures the addition of Triton X-100 or Tween 80 increased cadmium uptake by about 30% with no inhibition of cell growth, and in intact cells Triton X-100 increased cadmium accumulation by about 80% compared to surfactant-free controls. Considering balance between increased uptake and pollution, the addition of 0.1% Triton X-100 was preferable. By the mixed addition with defoamer silicone, during growth of cells Tween 80 or Triton X-100 enhanced uptake efficiency of cadmium compared to its single addition, whereas in intact biomass each of surfactants tested had no significant effect on cadmium uptake. The uptake of cadmium was observed to rise sharply to a maximum and then declined with increasing pH, and maximum accumulation of cadmium by growing and intact cells occurred at the pH of 6.0 and 7.0, respectively. A significant increase in cadmium uptake occurred with shaking culture. Cadmium uptake by growing and intact cells was almost completed during the culture time of 72 or 24 hrs, respectively. Scalded cells sorbed much more cadmium-ion than living cells.
무인쌍동선의 실해역 DP 성능평가를 위한 시스템 및 모형시험 검증 기법 개발
송형도(Hyung-Do Song),조석규(Seok-Kyu Cho),손남선(Nam-Sun Son) 한국항해항만학회 2022 한국항해항만학회 학술대회논문집 Vol.2022 No.2
선박의 운용 효율을 높일 수 있는 방법인 무인 운용체계는 근래에 많은 관심을 받고 연구되어 왔다. 특히 무인수상선과 무인수중체의(USV-AUV)의 복합 운용 분야는 그 동안 어려움이 있었던 심해저 탐사 및 특수 임무 활용에 용이하여 많은 연구가 수행되고 있다. 본 연구에서는 쌍동선 형태인 무인수상선이 모선이 되고 무인수중체가 결합하여 충전하고 다시 진수하여 원거리 및 심해저 조건에서 무인수중체가 운용 가능하도록 하는 시스템의 일부인 USV-AUV의 docking을 위한 DP 시스템을 개발하고 선박해양플랜트연구소 해양공학수조에서 모형시험을 통해 이를 검증하였다. 또한, 실제 제작된 무인쌍동선과 추진 시스템을 활용하여 모형시험을 통해 검증한 DP 알고리즘을 적용하여 화성 제부도 앞바다에서 실선 DP 테스트를 수행하였다. 실 해역에서의 DP 시스템 테스트는 정확한 환경 조건의 계측 및 구현이 어려워 모형시험과같은 정량적인 평가는 어렵지만, 정성적으로 DP 시스템이 작동하는 것을 확인할 수 있었다.
시멘트 산업부문 온실가스(CO<sub>2</sub>) 배출계수 산정 연구
송형도,홍지형,엄윤성,이수빈,김대곤,김정수,Song, H.D.,Hong, J.H.,Um, Y.S.,Lee, S.B.,Kim, D.G.,Kim, J.S. 한국대기환경학회 2007 한국대기환경학회지 Vol.23 No.2
The cement industry is one of the energy intensive industries such as petrochemical and steel industry. The energy efficiency of cement industry is high comparing to oversea's cement industries due to the enforcement of energy conservation policies. The purpose of this study is estimate emission factors for greenhouse gas ($CO_{2}$) in cement industry. The results of field study, quicklime contained quantity of five factories were $0.64{\sim}0.65$. Measurement emission (15,382 ton/day) is 40% higher than process emission (8,929 ton/day) on the IPCC Guidelines (1996). Add to combustion emission on the lines of IPCC Guidelines (1996) is similar to the emission of this study. The emission factor of greenhouse gas ($CO_{2}$) were as follows the emission factor between $9.01E-01{\sim}2.15E-01\;ton/ton$ for $CO_{2}$. The result of this study is higher than emission factor of IPCC (0.51) but it is similar to U.S. EPA's (0.952).