다단 중공사 막 분리에 의한 음폐수 소화가스의 메탄 회수

최근희(Keun-Hee Choi),천승규(Seung-Kyu Chun) 대한환경공학회 2018 대한환경공학회지 Vol.40 No.5

폴리술폰계 중공사 기체 분리 막에 의한 음폐수 소화가스내 메탄(CH₄) 회수 실험을 하였다. CH₄ 60 mol %, 이산화탄소(CO₂) 40 mol %의 조제가스 실험에서 단일 모듈 사용시 공급압력 0.5 MPa와 0.7 MPa에서 생산 가스의 CH₄ 농도는 98% 이상이었으나 회수율은 40% 미만으로 낮았다. 반면, 2단 재순환 방식의 경우 1단과 2단의 막 모듈 면적비 1:1에서 회수율은 0.5 MPa와 0.7 MPa에서 각각 76.8%, 79.1%, 면적비가 1:2인 경우는 각각 85.0%와 86.1%로 크게 개선되었다. 음폐수 소화가스를 대상으로 생산 가스내 CH₄ 농도 98%이상을 유지하면서 다단 모듈방식으로 실험한 결과, 4단 분지형과 3단 분지형 중막 모듈 면적비 1:1:0:1과 2:1:0:1이 상대적으로 높은 CH₄ 회수율을 보였다. 반면 단위 막 면적당 생산 가스량은 3단 직렬방식이 3단 및 4단 분지형에 비하여 높게 나타났다. CH₄ recovery experiments were conducted using polysulfone hollow fiber gas separation membranes. In the experiment conducted using synthetic gas (60 mol % CH₄ and 40 mol % CO₂) in a single module at pressures of 0.5 and 0.7 MPa, the concentration of CH₄ in the produced gas was over 98%. However, the CH₄ recovery rate was low at under 40%. In comparison, under two stage recirculation, CH₄ recovery rates improved to 76.8% (0.5 MPa) and 79.1% (0.7 MPa) at a membrane area ratio of 1:1 (stage 1 versus stage 2). Recovery rates further improved to 85.0% (0.5 MPa) and 86.1% (0.7 MPa) at a membrane area ratio of 1:2. In the experiment using food waste water digestion gas, in which the concentration of CH₄ in the produced gas was maintained at over 98%, membrane area ratios of 1:1:0:1 and 2:1:0:1 among three branching form and a four stage branching form produced relatively high recovery rates. Meanwhile, the most desirable gas production per unit membrane area was achieved at a three stage series connection compare to the case of four and three stage branching form.

생쥐 골수세포 미소핵 검사에 의한 32P - colloid의 유전독성에 관한 연구

김지열,범희승,최근희,김희경,위인선 ( Ji Yeul Kim,Hee Seung Bom,Keun Hee Choi,Hee Kyung Kim,In Sun Wui ) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1

두피관리 종사자들의 직무만족도 연구

박주희 ( Ju Hee Park ),최근희 ( Keun Hee Choi ) 한국미용학회 2011 한국미용학회지 Vol.17 No.6

The serious scalp problem has contributed to the quick expansion of scalp-related market, and so the number of head scalp workers shows a rising trend, too. The purpose of this study is to understand the working environment and job practices of scalp care workers and thereby to find out the ways for the growth of related field. Both methods of questionnaire survey and reference studies were used to search for the factors affecting the job satisfaction of scalp care workers. Finally, as the influence of the problem recognition at scalp care shops on the job satisfaction, the study indicated that the dissatisfaction with working environment system caused the low satisfaction with work partner relationship satisfaction, satisfaction with job itself, satisfaction with training system, which led to their consideration of leaving from work, while positively influencing the satisfaction with pay system. The dissatisfaction with compensation and pay system affected the satisfaction level to be low in the satisfaction with the job itself, pay system, and promotion system, which worked as the influence to consider leaving from work. The dissatisfaction with welfare system worked as the factor leading to lowering the satisfaction with pay system. As the above findings show, the ``consideration of leaving from work`` is seen most among the job satisfaction factors for scalp workers, which needs proper response and improvement. Among the factors of problem recognition, the improvement should be made in the system of welfare, compensation, and pay, which are the weak areas in hairdressing industry, together with the improvement in working environment. Additionally, the proper measures in the system relating to turnover and pay system and the contents of job itself should be urgently taken for the improvement, in view of the fact that the dissatisfaction with working environment, compensation and pay system, welfare system affect most the ``consideration of leaving from work``, ``satisfaction with pay system``, and ``satisfaction with the job itself``.

고구려(高句麗) 고분벽화(古墳壁畵)에 나타난 헤어스타일 분석(分析)과 일러스트레이션

이향숙 ( Hyang Sook Lee ),최근희 ( Keun Hee Choi ) 한국미용학회 2009 한국미용학회지 Vol.15 No.4

The hair style of women in the Goguryeo`s ancient tomb paintings can be said as the root of Korean ancient hair style. It is also the root of beauty art. But, because of its unclear contour and colour, it is very hard to understand its substance. The reason why it is reproduced with the illustration rather than the spatial reproduction is to express such vague part more concretely by using the data. Before entering the illustration, the hair style to reproduce should be selected first. As the Goguryeo`s ancient tomb paintings are on the wall of tombs, there should be paintings which have some discernable contours at least. Even though this condition is satisfied, there are wall paintings which lack the meaning of reproduction in view point of reproduction of ancient hair style. The hair styles for the illustration were selected from these tombs. They are 8 kinds in total: hiljagye, top hair, loosen gimyeong hair, chignon hair, hanged goek, tied jungbal hair, hwangye, and jiknyeo hair. In the illustration, any presumption is possible. But in the approach through the data application, the maximum restraints are imposed on it. The illustration work for the reproduction of Goguryeo women`s hair style was the one that provided the possibility and the limit at the same time. This work will be helpful in any ways for the future reproduction of Goguryeo women`s life style.

국내 대학의 미용관련학과 및 인력 배출 현황 분석

강수경 ( Soo Kyung Kang ),최근희 ( Keun Hee Choi ) 한국미용학회 2012 한국미용학회지 Vol.18 No.6

This study is aimed at presenting the basic data which enables us to decide and put in practice the policy of professional beauticians training by surveying the domestic beauty-related universities and colleges with graduated beautician status. And this study has categorized 2-year colleges and universities because of their representation of beauty-related school course classifying into small groups such as curriculum, school subjects, new students and graduates, the percentage of employment and the ratio of students to a higher school in recent 3 years. This survey restrictively includes 2-year colleges and 4-year universities. University ALIMI site operated by KCUE(Korean Council for University Education) and each university homepage are utilized for this study. The study result as follows; 1. 31 universities with 36 courses of study out of 196 universities and 99 colleges with 119 courses of study out of 141 2-year colleges have beauty-related departments. 2. Both 4-year and 2-year colleges compose the integrated beauty-related subjects and the courses of study after 2010 have specialized, classified and branded its subjects 3. New students slightly increase in 4-year universities and also slightly decrease in 2-year colleges. 4. The percentage of employment is average 55% from 4-year universities and 41% from 2-year colleges. In conclusion, the development of beauty industry is originated only from the training personnel with professional knowledge and beauty-related education institutes play a pivotal role in their training. To accomplish the quality of training, we need to centralize our training curriculum, vitalize the beauty market to employ graduated students, connects education with beauty industry into the better and stabler job market. This study suggest that we need multilateral policy to set up and backup.

남자 대학생의 헤어, 피부, 메이크업에 관한 의식이 외모관리행동에 미치는 영향

우수진 ( Su Jin Woo ),최근희 ( Keun Hee Choi ) 한국미용학회 2011 한국미용학회지 Vol.17 No.1

The purpose of this study was to examine the appearance management behaviors(hair care, skin care and makeup) of male college students, their aesthetic consciousness, the factors of their appearance management behavior and the impact of their aesthetic consciousness on appearance management behaviors. And it`s additionally meant to investigate the influence of their demographic characteristics to make a contribution to the development of the beauty industry. The subjects in this study were 400 male college students in and around Seoul. The major findings of the study were as follows: 1. The most prevalent appearance management behavior among the male college students was hair care, followed by skin care and makeup. 2. As a result of checking the impact of their aesthetic consciousness on appearance management behaviors, the appearance management behaviors of the male students were under the influence of their own aesthetic consciousness. 3. Concerning the relationship of their general characteristics to aesthetic consciousness and appearance management behaviors, there were significant differences in body shape management according to major. In conclusion, the aesthetic consciousness of the male college students affected their own appearance management behaviors in a positive manner, and well-educated, professional and full-fledged personnels should be fostered in the beauty industry to address the diverse needs of male college students.

병원에서 실시되는 미용복지 봉사활동 현황

차영신 ( Young Sin Cha ),최근희 ( Keun Hee Choi ) 한국미용학회 2009 한국미용학회지 Vol.15 No.4

Haman has a desire to be beautiful. Beautiful appearance is a factor provoking emotion, means to express contemporary time and a will to improve and develop human. Everyone seeks beauty whether he or she is in healthy or sick. In case of hospital volunteer activities, guide, assistant for hospitalization process, ward help, library help, beauty service help, main supply office help etc. are performed. The purpose of this paper is to identify current beauty care service to patients in hospital and develop way to invigorate current service satisfaction from observing service desire from patients. It does this by surveying patients at hospital in Seoul. Survey was done from February to March in 2008 year. Total 310 survey questionnaire were distributed and analyzed 307 questionnaires except some incomplete cases. Survey data were used for frequency analysis, t-test, factor analysis, confidence analysis, ANOVA and Duncan`s test by using SPSS (Statistical Package for the Social Science) window version 12.0 software. Survey results shows that the number of respondents who have interest on appearance greater than the number of responds who do not have interest on it. 55 percent of the respondents chose hair style as a main interest on appearance. 69.4 percent respondents were aware of beauty service offered in hospital while 30.6 percents did not know the service so that more promotion for the beauty service is needed in terms of hospital service perspectives. 62.9 percent of respondents had experience of using the beauty service. In conclusion, most beauty service in hospital has been provided by volunteers. Increase in the number of volunteers and education system for volunteers will be needed for satisfactory and effective beauty service offering. Secure of more volunteers, establishment of network within hospitals and continuous system set up will need to invigorate beauty service in hospital. Hospital should invest and have an interest on beauty service in that most volunteering beauty service has been offered in poor facility conditions.

수용성 카이토산에 의한 체내 방사성스트론튬의 제거

김지열(Ji Yeul Kim),최근희(Keun Hee Choi),김희경(Hee Kyung Kim),김광윤(Kwang Yoon Kim),범희승(Hee Seoung Bom) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.1

N/A Chitosan is known to be one of the natural chelating agents. It is derived from chitin which is a cellu1ose-like biopolymer distributed widely in nature, especially in shellfish, insects, fungi, and yeast. There are two forms of chitosans, water solube and insoluble. The purpose of the present study is to investigate whether water soluble chitosan can be applied to reduce the bioabailability of radiostrontium in foods. We compared the effect of water soluble and insoluble chitosans on the absorption of ingested radiostrontium(85Sr). Three percent water soluble and insoluble chitosan solutions were given ora1ly, and immediately after 85SrCl2 (0.2 μCi) was administered to rats using a orogastric tube. In one group water solube chitosan solution was given for additional 4 days. And in control group no chitosan was given. Each group consisted of 6 rats. The whole-body retention of 85Sr, determined by in vivo counting method, was lower in water soluble chitosan group than that of water insoluble chitosan group and that of control. Urinary excrecion of 85Sr in chitosan-treated rats was higher than that of control. And 5 day ingested group of water soluble chitosan showed least whole retention of 85Sr. In conclusion water soluble chitosan was more effective in reducing bioavailability of ingested radiostrontium in the gastronintestinal tract than insoluble chitosan.

인체말초혈액 림프구와 마우스골수세포에서 중기염색체 분석법과 미소핵검사법을 이용한 방사선적응반응 평가

김지열(Ji Yeul Kim),범희승(Hee Seung Bom),민정준(Jung Jun Min),송호천(Ho Cheon Song),최근희(Keun Hee Choi),정환정(Hwan Jeong Jeong),이승연(Seung Yeon Lee) 대한핵의학회 1998 핵의학 분자영상 Vol.32 No.6

N/A Purpose: Radiation adaptive response in human peripheral lymphocytes and mouse bone marrow cells was investigated using both metaphase analysis and micronucleus assay. We assessed the correlation between both tests. Materials and Methods: Two groups of the human peripheral lymphocytes and mouse bone marrow cells were exposed to low dose (conditioning dose, 0.18 Gy) or high dose (challenging dose, 2 Gy) γ-rays. The other 4 groups were exposed to low dose followed by high dose after several time intervals (4, 7, 12, and 24 hours, respectively). The frequencies of chromosomal aberrations in metphase analysis and micronuclei in micronucleus assay were counted. Results: Chromosomal aberrations and micronuclei of preexposed group were lower than those of the group only exposed to high dose radiation. Maximal reduction in frequencies of chromosomal aberrations were observed in the group to which challenging dose was given at 7 hour after a conditioning dose (p<0.001). Metaphase analysis and micronucleus assay revealed very good correlation in both human lymphocytes and mouse bone marrow cells (r=0.98, p<0.001; r=0.99, p=0.001, respectively). Conclusion: Radiation adaptive response could be induced by low dose irradiation in both human lymphocytes and mouse bone marrow cells. There was a significant correlation between metaphase analysis and micronucleus assay

마우스에서 경구투여한 방사성스트론튬의 제거에 대한 경구투여 카이토산과 알긴산의 효과

김지열(Ji Yeul Kim),범희승(Hee Seung Bom),최근희(Keun Hee Choi),김희경(Hee Kyung Kim),김광윤(Kwang Yoon Kim) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.1

N/A Radiostrontium is one of fallouts. It can be absorbed through intestine and causing radiation injury to bones. The purpose of this study is to evaluate the inhibitory effect of 10% chitosan (water soluble and insoluble) and 10% alginate (water soluble and insoluble) on radiostrontium adsorption. Water soluble and insoluble chitosans and alginates were given to 10 NIH male mice in each group for 7 days. At the 7th day, 74 MBq of 85Sr were given through orogastric tube. Chitosans and alginates were given for additional 7 days. During the 7 days, radioactivities of feces were counted daily. Finally animals were sacrificed, and radioactivities of bones were counted. Feca1 excretion was significantly higher in chitosan and alginate group as compared to control from the lst day (p〈0.01). Water soluble chitosan group showed highest fecal excretion. Bony retention was significantly lower in the treated group than the control (p〈0.01). There was no difference among treated groups. In conclusion, both water soluble and insoluble chitosans and alginates were effective agents on lowering orally ingested radiostrontium (85Sr)