동아의 체중조절 효과

홍석산,이승환,김철용,권석형,황보식 한국식품영양학회 2002 韓國食品營養學會誌 Vol.15 No.4

본 연구에서 선발된 17종의 천연물을 Sprague- Dawley rat에 급여한 결과, 체중 증가, 에너지 소비, fat pads 중량, 간의 triglyceride 함량, atherogenic index 그리고 혈중 글루코오스의 함량 등이 감소하는 경향을 나타내었다. 특히 동아를 구강으로 섭취시킨 결과, 체중 증가, 에너지 소비, fat pads 중량, 그리고 혈중 글로코오스의 함량등이 감소하였으나, 간의 triglyceride 함량은 오디와 송엽의 열수 추출물보다 적게 감소하였다. 동아, 오디, 그리고 송엽을 혼합하여 사용한 결과, 각각의 원료를 사용할 경우보다 비만이 개선되는 것으로 나타났다. This study attempted to evaluate the effectiveness of function of Wax Gourd for obesity and the related disease of adult people can be developed by the combination of the 17 food materials screened in this study. The experiments using Sprague-Dawley male rats show that seventeen kinds of food material inhibited the increase of body weight gain, energy intake, fat pads weight, liver triglycerides content, atherogenic index, and blood glucose concentration induced by cafeteria diet. Oral administration of wax gourd decreased most body weight gain, energy intake, fat pads weight, and blood glucose concentration induced by cafeteria diet. Oral administration of wax gourd decreased most body weight gain, energy intake, fat pads weight, and blood glucose concentration. Liver triglycerides content was the lowest in the group administered mulberry stem extract and the group administered pine leaves showed the lowest atherogenic index. The combined administration of wax gourd, mulberry stem extract and pine leaves improved more the obesity and related symptoms than the individual administrations.

고혈압성 흰쥐(Spontaneous Hypertensive Rat)에서 Nifedipine투여가 Mixed-Function Oxidase와 Lipid Peroxidation에 미치는 영향

배영숙,홍영숙,김환권,김이우 中央醫學社 1989 中央醫學 Vol.54 No.10

The effect of intraperitonelly administered nifedipine, an antiphypertensive medication on the mixed-function oxidase system components, such as cytochrome P-450, cytochrome b5, NADPH- and NADH-cytochrome C reductause, p-nitroanisole-O-demethylase, and the formation of lipid peroxide and UDP-glucuronosyltransferase in the spontaneous hypertensive rat hepatic microsomes were investigated. The result is as follows: 1. After 3-7 day of nifedipine injection bidaily, the contents of cytochrome P-450 and b5 were slightly increased and after 4 weeks of nifedipine injection bidaily, the contents of cytochrome P-450 and b5 were increased significantly. 2. After 2 and 4 weeks of nifedipine injection bidaily, the activities of NADPH- and NADH-cytochrome C reductase were increased significantly. 3. After 2 and 4 weeks nifedipine injection bidaily, the activities of monooxygenase, p-nitroanisole-O-demethylase were increased significantly. 4. The formation of lipid peroxide did not change for 4 weeks injection bidaily. 5. After 2 and 4 weeks of nifedipine injection bidnily, the activity of UDP-glucuronosyltransferase was increased markedly.

본딩 웨이퍼 검사를 위한 모델링 연구

임영환,양시은,장동영,안효석,홍석기 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

본 논문에서는 레이저 빔 투과를 이용한 본딩 웨이퍼 검사 방법을 제안하고 검사 장치를 설계 구현하였다. 1064nm파장에서의 정상웨이퍼를 일정한 비율로 투과하였다. 본딩 불량으로 인한 웨이퍼의 기공은 두께에 따라 투과율이 현저하게 변화하여 기공 부분을 검출하였다. 이러한 기공은 두께의 변화가 있으며 광량의 변화하는 부분이 에어갭으로 인식 카메라로 쉽게 구분이 가능하였다.

수복재료와 임플랜트 종류에 따른 임플랜트및 지지조직의 응력분포

최창환,양홍서,오종석 전남대학교 치의학연구소 2001 구강과학 Vol.13 No.4

This study was aimed to analyze the stress distribution of implant and supporting tissue in single tooth implant restoration using Bra˚emark system®(Nobel Biocare, Gothenberg, Sweden) and Bicon system(Bicon Dental Implants, Boston, MA). Two dimensional finite element analysis model was made at mandibular first premolar area. As a crown materials porcelain, ceromer, ADA type Ⅲ gold alloy were used. Tests have been performed at 25Kgf vertical load on central fossa of crown portion and at 10㎏ load with 45° lateral direction on cusp inclination. The displacement and stresses of implant and supporting structures were analyzed to investigate the influence of the crown material and the type of implant systems by finite element analysis. The results were obtained as follows: 1. The type of crown material influenced the stress distribution of superstructure, but did not influence that of the supporting alveolar bone. 2. The stress distribution of ceromer and type Ⅲ gold alloy and porcelain is similar. 3. Stress under lateral load was about twice higher than that of vertical load in all occlusal restorative materials. 4. In Bicon system, stress concentration is similar in supporting bone area but CerOne system generated about 1.5times greater stress more in superstructure material. 5. In Bra˚emark models, if severe occlusal overload is loaded in superstructure, gold screw or abutment will be fractured or loosened to buffer the occlusal overload but in Bicon models such buffering effect is not expected, so in Bicon model, load can be concentrated in alveolar bone area.

만성 알코올 중독환자에서의 경련

류상효,송홍기,이주헌,박환석,남경식 대한간질학회 2003 대한간질학회지 Vol.7 No.1

CFRP 복합재 적층판의 파괴메카니즘에 관한 연구

이권범,박환규,홍석주,김기형 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

In this study, when CFRP lamimates are subjected to static loading by the indentation of steel ball to examine a failure mechanism of lamimates, the fracture surface of interlaminar delamination generated at interfaces is investigated by the scanning electron microscopy (SEM). When orthotropic CFRP laimates stacked with two interface are subjected to static loading, interlaminar delaminations extend from the loading side to delamination edge even at any interface, and the fracture surface fo interlaminar delamination generated at two interfaces is symmertrically formed. In the CFRP laminates, the fracture mechanism sppears mainly to be the mixed mode(modes Ⅰ+Ⅱ), and the ratio of mixed mode varies partially. After the fracture initiates at the interface near the loading side with mode Ⅰ, the mixed mode gradually developes, but the total surface at the opposite plane to the loading side fractures with the mixed mode(modes Ⅰ+Ⅱ). While transverse cracks are generated, the direction of shear stresses reverses itself ar the delaminated surface, clarified by the hackle direction of fracture surface.

CMI 方法을 通한 科學의 基本槪念 理解의 實態分析과 槪念의 完全形成方案

吳垈燮,呂煥鎭,洪寬錫 경북대학교 과학교육연구소 1981 科學敎育硏究誌 Vol.5 No.-

The system of scientic knowledge is composed of general discriptions and law of nature which are explained by special words corresponding to the basic scientific concepts. We studied a students learning process of these basic scientific concepts in sciene course of primary sehool. First, we made a diagnostic test which makes it lear whether student learned the concepts correctly on not. Second, We gave thir test to the students three times with proper intervals in one year science course. Based on the result of test, We made an U-P table and a M-P table by computer. It shows that which concepts are learned by each student. By this evidence, we proposed the reforming plans for teaching-learning method.

Measurement of the Time Taken for Initial Water Discharge According to the Number of Kinks in the Fire Hose of the Indoor Hydrant System

Hong, Suk-Hwan,Kong, Ha-Sung The International Promotion Agency of Culture Tech 2021 International Journal of Advanced Culture Technolo Vol.9 No.3

In this study, we tried to examine how the kinking of the fire hose affects the time taken for initial water discharge by measuring and analyzing the time taken for initial water discharge with different number of kinks at different locations of the hose. The average time taken for initial water discharge was obtained by measuring the time in the unkinked state of the fire hose. Based on this standard, we conducted the experiment by selecting the kinking locations in the hose near the water outlet and nozzle, and setting the number of kinks to 3, 6, 9, and 12. The results of this study are as follows: First, if the fire hose has 5 kinks or more near the nozzle, no water was released. Second, when comparing the case of no kinks and 4 kinks near the nozzle, there was no significant difference in the time taken for initial water discharge. Third, when the fire hose was kinked 10 times near the outlet, the time required for initial water discharge increased by 1.62 seconds on average compared to the case with no kinking, but there was no problem with water discharge. Lastly, regarding the kinking locations of the fire hose, it was found that the greater the number of kinks near the nozzle than near the outlet, the greater the effect on the discharge. As a result, it is concluded that it would be preferable to install non-kinking devices near the nozzle of the fire hose.

Melanocyte-stimulating Hormone Receptor (MC1R) Genotype and Its Effects on Coat Color in Korean Jindo Dogs

Hong, Kyung-Won,Kim, Sang-Wook,Jang, Hong-Chul,Yang, Seung-Min,Shin, Young-Bin,Hong, Yoon-Hye,Kim, Jong-Seok,Oh, Seok-Il,Choi, Yoon-Ju,Chung, Dong-Hee,Yang, Boh-Suk,Lee, Ji-Woong,Choi, Bong-Hwan Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.8

The Jindo dog is a Korean natural monument and is recognized by the Fédération Cynologique Internationale. A prominent feature is the diverse coat color within the breed. To analyze the genetic basis of variation in the Jindo coat color, we sequenced the protein-coding regions of the melanocortin 1 receptor gene (MC1R). The MC1R coding sequence was determined from 154 dogs in five breeds (Jindo, Labrador Retriever, English Springer Spaniel, Belgian Malinois, and German Shepherd). To confirm the genetic structure of sampled populations, we tested for Hardy-Weinberg equilibrium (HWE) and computed $F_{st}$ The sample populations did not significantly deviate from HWE. $F_{st}$ was 0.02 between white and fawn Jindo dogs; this was lower than $F_{st}$ between breeds. Six single nucleotide polymorphisms (SNPs) were detected in the MC1R coding region. Among the six SNPs, five were non-synonymous (S90G, T105A, Q159P, M264V, and R306ter) and one was synonymous SNP (Y298Y). From the SNPs, we predicted four haplotypes (H1, H2, H3, and H4) for Jindo MC1R. Jindo dogs had different haplotypes corresponding to different coat colors. H1 was frequently observed in white Jindo dogs with an odds ratio of 5.03 (95% CI: 2.27-11.18, p<0.0001), whereas H2 and H4 were observed only in fawn Jindo dogs. Our findings indicate that SNP haplotype can influence coat color. Knowledge of MC1R haplotypes can help discriminate white and fawn coats in Jindo dogs. We hope this report will trigger more research into the genetics of this traditional Korean dog and will be a reference for dogs of Asian origin. Also, our results will provide a useful genetic marker for Jindo dog breeders who have selected for specific colors.

레스토랑의 서비스品質管理에 관한 硏究

홍석환(Hong, suk hwan),서재원(Seo, jae won),이홍경(Lee, hong kyung) 한국문화관광학회 2004 문화관광연구 Vol.6 No.1

With overall changes in the food service market, we have to shift our attention on the aspect of just providing meals for customers but should concentrate on what processes the meals are served to the customers. What becomes interesting to us in connection with managing the food service market from such perspective is the management policy stressing the importance of the services offered at the restaurants and quality of the food. More than anything else, the high quality of services, taste of the food, cleanliness and cozy atmosphere in the restaurant lead to the growth in the food service market. However, the issue of securing the brand image is expected to up and this will require changes in managing the restaurants. I have attempted to limit the scope of this study to the quality of the services offered at the restaurants and management method for the service quality. In order to conduct in-depth inquiry into the topic area, I presented problems as an introduction and described the purpose and scope of study in Chapter 1, examined the concept and features of the restaurants and theoretical research of the quality control of the services in the restaurants for theoretical examination of the service quality control in Chapter 2, organized survey and design for an empirical analysis in Chapter 3, identified the empirical analysis results, and summary and discussion of the analysis results in Chapter 4, and in Chapter 5, described summary of research results, issues suggested by the research results and the methods for controling the service quality in the restaurant and presented directions for continuing researches for the conclusion of this study. At the stage of experimental research, I limited the target of the research to the restaurants and dining halls located in Seoul and limited the research period to the month of July of 2003. Since the quality of services offered at the restaurants is not only an approach to satisfy the customers but also a method to improve on the competitiveness of restaurants and therefore can help sustain the management goals of restaurants, the ultimate purpose of the study is to propose management methods for service quality at the restaurants.