錦江産 철갑상어의 비늘 特性에 관한硏究

劉奉錫,金鍾連,金容煥 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.3

The morphological characteristics of scales on Acipenser sinensis can be summarized as follows: 1.The form of scales on Acipenser sinensis caught in the Gum river can be classified form of Chrysanthemum, Frying wild goose, Butterfly, Fragment, Dog teeth scales. 2.The longitudinal diameter on the scales of the dorsal part and the lateral part is longer than the transverse diameter of it, but ventral part is contrary. 3.Half of the transverse diameter is divided by the tuber line and both of transverse diameter of dorsal scale are the same length. But above transverse diameters of lateral scales are longer than below length, and in the ventral scale below lengths are longer than above lengths. 4.Unappeared part of scale is not formed by a groove and ridge, form of a net work but appeared part is forms a network, a form of a same mind. 5.The scales having the largest diameter and the smollest diameter are appeared in front of the pectoral fin. 6.The average growth rate of all scales is rapid on anterior than posterior.

近視性 屈折異常의 疫學的 硏究

劉世煥,廉容泰 고려대학교 의과대학 1984 고려대 의대 잡지 Vol.21 No.1

The distribution of ametropia whether refractive or axial in communities is variable according to factors such as ethnicon, age, living environment, and working begavior among others. Among young adults in Korea whose eves are fully matured most ametropia results form myopic refractive errors. It is well known that the prevalence of myopia among college students in Korea is very high, more than 60%. Nevertheless, community based epidemiological research on the causalities of myopia has: not been adequately performed to provide preventive or control measures for myopia for the young in Korea. In view of this, the author attempted an epidemiological study on myopia using the distribution of personal characteristics, and analyzing these factors on a total of 8,555(4,006 in 1981 and 4,549 in 1982) newly enrolled college students of Korea University The summarized results were as follows: 1. A total sample of 115 among 3,337 ametropic cases discovered during screening by visual acuity examination were selected for confirmation by objective refraction tests. One hundred percent of these were discovered to be of the myopic type. Statistical analysis of visual acuity and refraction revealed: R=-3.172+3.407V, r=-0.781, p<0.001 V=0.748+0.179R, r=-0.781, p<0.001 Using simple linear regression; and log(-R)=0.543-1.050V, R^(2)=0.673, F=419.478, p<0.001 logV=-0.042+0.629R, R^(2)=0.760, f=588.559, P<0.001 using logarithmic transformation of exponential curve linear regression, where V= visual acuity, and R=refraction in diopter. 2. The prevalence of ametropia was 65% in 1981 and 73% in 1982. Most of the ametropic cases were predicted to be the myopic type of refractive errors. No significant difference in prevalence by sex was found. However, the rates among males raised in urban areas, and among high economic females found to be significantly higher than other groups. 3. Factors related to causalities of myopia were analysed in terms of work credit, reading behavior, heredity, and food habits as shown in the followings; (1) The correlation between the variables of visual acuity and score on college entrance examinations was V=-0.01S+1.52, r=-0.14, p<0.001(where S=score) Showing a low interpretation capacity but very high reliability. (2) Average distance between the eyes and a book while reading was significantly shorter in myopia than the emetropia group. Distance in the majority of myopia cases were less than 25cm. (3) Attack rate of myopia of siblings born from myopic parents(one or both eyes) was found to be significantly higher(doubled) than that from emetropic parents. This provides substantial evidence that heredity plays an important role in revealing myopia. (4) There were more vegetarians and persons with seriously unbalanced diets in the myopia group. However, rates by visual acuity were too low to be tested for significance. 4. Clinical findings included the relationship between the site of major eye and myopic eye, data on the correction of visual acuity, and onset on visual disturbances. (1) In the majority of the emetropic group the major eye was the right eye, while in persons whose right eyes were myopic the majority had left eyes as the major ones. Similarly, in case where the left eye was myopic the right eye tended to be the major eye. In cases where both eyes were myopic, the pattern followed the emetropic group in that the majority had the right eyes as the major eye. (2) The more severe the myopic status was, the higher the rate of wearing glasses was. About 50% of glasses wearers got their glasses from opticians without an ophthalmologist’s prescription. (3) The onset of visual disturbance in the majority(47%) of myopic cases was during highschool.

제약 프로그래밍과 메타휴리스틱을 활용한 차량 일정계획 시스템 개발에 관한 연구

김용환,장용성,유환주 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(2)

Constraint Programming is an appealing technology for modeling and solving various real-world problems, and metaheuristic is the most successful technique available for solving large real-world vehicle routing problems. Constraint Programming and metaheuristic are complementary to each other. This paper describes how iterative improvement techniques can be used in a Constraint Programming framework(ILOG Solver and ILOG Dispatcher) for Vehicle Routing Problem. As local search gets trapped in local solution, the improvement techniques are used in conjunction with metaheuristic method.

PCR을 이용한 국내 및 수입 축산물 유래 Listeria monocytogenes의 유전학적 분석연구

우용구,이수화,이철현,최정수,류재두,김영일,이오수,김봉환 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.2

One hundred-fifty two of Listeria strains were isolated from domestic chicken carcasses, a slaughter-houses from nationwide from 1996 to 1997 and imported livestock products from a ten foreign countries including the USA, China, France and Thailand. To substitute the laborious and time consuming procedures of clinical laboratory standard diagnostic methods, the rapid and specific multiplex PCR(M-PCR), which was designed to amplify a three kinds of genes simultaneously f3r specific detection and differentiation of L. monocytogenes(LM) by one step procedure, was established. The LM strains confirmed with M-PCR were analysed to their genetic diversities by RAPD using the two primers(D87 & MMTl), and also evaluated on their discriminatory abilities(na) between two primers. our study also conducted the REP-PCR and ERIC-PCR for evaluation of the possibility of REP and ERIC elements for genetic subtyping of LM strains. According to the REP-PCR and ERIC-PCR fingerprinting patterns, LM strains were divided into 7(ERIC-type) and 4(REP-type) major clusters at the relative clone cut off value of 80%. According to the computer analysis of PCR results using the GelCompar Ⅱ software, ERIC-PCR(DI=0.955) had expressed the most high discriminatory ability and followed by REP-PCR(DI=0.952), RAPD(D87; 0.954, MMT1; 0.937), in order. The combined analysis of the present PCR results was also expressed the reliable and useful discriminatory ability(DI=0.916). This study suggested that PCR based methods could be used as an reliable, reproducible, rapid, and highly discriminatory method for the genetic differentiation of genus Listeria.

유기용제 취급근로자들의 요중대사물질과 말초임파구 자매염색분체교환 발현빈도에 관한 조사연구

김돈균,황인경,류철인,이수일,정갑열,이용환,이충렬,현원일,김석봉,전용덕 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1

저자들은 유기용제 취급여성근로자 90명을 대상으로 1988년 7월부터 1989년 8월까지 말초혈액임파구에서의 자매염색분체교환의 발현빈도를 조사하고 이들의 업종, 근속연수, 요중마뇨산 농도등이 자매염색분체교환의 발현빈도에 미치는 영향을 조사하였으며 그 결과를 요약하면 다음과 같다. 1. 유기용제 취급근로자들의 말초혈액임파구에서의 자매염색분체교환의 발현빈도는 대조군에 비하여 유의하게 증가되었다. 2. 말초혈액임파구에서의 자매염색분체교환의 발현빈도가 가장 높은 업종은 프라스틱제품 제조업이었다. 3. 근속연수가 말초혈액임파구에서의 자매염색분체교환의 발현빈도에 미치는 영향은 현저하지 않았다. 4. 요중마뇨산농도와 말초혈액임파구에서의 자매염색분체교환의 발현빈도간에는 유의한 상관관계가 있었다. In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaluate the effect of organic solvents on the health in industrial workers, the authors studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocytes from 90 female workers expoxed to organic solvents and 20 non-exposed female workers. The results obtained were as follows : 1. The frequency of sister chromatid exchanges in peripheral lymphocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 control subject. 2. The frequency of sister chromatid exchanges was significantly increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chromatid exchanges by carriers of the exposed workers.

Optimum Cropping Pattern for Year-Round Supply of Marketable Fresh Ear in Waxy Corn

Yong Hwan Ryu,Hyeon Gui Moon,Tae Wook Jung,Seon Woo Cha,Ki Jin Park 한국육종학회 2001 한국육종학회 학술발표회 발표요지 Vol.2001 No.9

Effect of Serum IGF-I on Progesterone Concentration during Early Pregnancy in Korean Native Cattle (Hanwoo)

Ryu, Yang-Hwan,Yang, Jong-Yong,Seo, Dong-Sam,Ko, Yong Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.2

Insulin-like growth factor-I (IGF-I) is a polypeptide that has the function of regulating the expression of steroid hormones through endocrine, paracrine, and autocrine actions in reproductive organs. Moreover, IGF-I is involved in ovulation, implantation, maintenance of pregnancy, and development of fetuses in animals. Therefore, this study was conducted to investigate the effects of serum IGF-I concentration on progesterone ($P_4$) concentration and pregnancy rates in Korean native cattle (Hanwoo). Blood was collected at estrus (Day 0) and Day 11. Artificial insemination was performed at Day 0. Serum IGF-I and $P_4$ concentrations were measured by radioimmunoassay (RIA). Overall, $P_4$ concentration was higher at Day 11 than Day 0, whereas the pattern of IGF-I concentration was reversed. When animals were divided into two groups depending on the pregnancy status, $P_4$ concentrations of the pregnant group was significantly higher than that of the non-pregnant group at Day 0 (p<0.05) and Day 11 (p<0.05). But, lower IGF-I concentrations were detected in the pregnant group at Day 0 (p<0.05) and Day 11 (p<0.05) compared to the non-pregnant group. In conclusion, these results indicated that serum IGF-I is inversely associated with $P_4$ concentration during early pregnancy in Hanwoo.

Molecular Analysis of the 3'-Terminal Region of Lily Latent Carlavirus from Lilium lancitoium

Ryu, Ji-Hwan,Park, Hye-Won,Park, Won-Mok,Lee, Se-Yong,Ryu, Ki-Hyun The Korean Society of Plant Pathology 2000 Plant Pathology Journal Vol.16 No.4

The 3,000 nucleotides of 3'-terminal region of the genomic RNA of a new isolate of carlavirus from a Korean native lily (Lilum lancitoium) was cloned and its nucleotide sequences were determined. The coat protein (CP) gene of the virus showed 72.0% to 72.8% nucleotide sequence identities and 86.9% to 88.0% amino acid sequence identities with those of the four strains (two Korean, one Dutch, and one Japanese isolates) of lily symptomless virus (LSV). Interestingly, different amino acid sequences between the new isolate and LSV strains were located at the N-terminal region of the CP. Pairwise amino acid sequence comparison of the CP gene revealed sequence identities of 22.0% to 71.1% between the virus and other 9 carlavirus species. The 25 kDa and 12 kDa proteins genes of the virus share 30.7% to 76.3% and 31.1% to 85.8% amino acid sequence identities, respectively, with those of 8 other carlaviruses. The 16 kDa protein gene of the virus shares 16.7% to 72.9% amino acid sequence identities with that of 9 other carlaviruses. These data indicate that the virus, designated as lily latent virus (LiLV), is a distinct of the Carlavirus genus and distinguished from the known strains of LSV.

고농도 칼슘 함유 제지폐수의 처리를 위한 UASB/CO₂ Stripping System 개발

김용환(Yong Hwan Kim),류정용(Jeong Yong Ryu),송봉근(Bong Keun Song) 大韓環境工學會 2002 대한환경공학회지 Vol.24 No.6

국내 종합병원의 리모델링에 따른 병동부 복도공간 사례조사 및 분석

류용환(Ryu, Yong-Hwan),강봉구(Kang, Bong-Ku),최율(Choi, Yool) 한국생태환경건축학회 2017 한국생태환경건축학회 학술발표대회 논문집 Vol.17 No.2