A Study on Leptospiral infection of Cows by Blood Culture and Microagglutinin Test of Serum in A Korean Rural Area

이병천,김정순,허용,Lee Byeong-Cheon,Kim Jung-Sun,Heo Yong The Korean Society of Veterinary Clinics 1991 한국임상수의학회지 Vol.8 No.2

The study on leptospiral infection among cows was carried out to find out possible role of this domestic animal as an infection source for humans, and the magnitude of economic loss due to abortions caused by leptospiral infections among the domestic animal. Bood samples of 459 cows in May and 446 heads in November 1989 were collected from 19 villages of Kyunggi Province. These samples were cultured and serologically tested. Only one strain of leptospires, most strongly reactive to Pomona antibody, was isolated from duplicated cultures of 985 cow blood samples in EMJH medium. Serological test by MAT with seven reference strains and three locally isolated strains was positive in 12% of the sample in May and 26% in November ; positive rate increased slightly as the age of cows increased and male cows had higher positive rate, however, there was on difference in positive rate by type of cow and area. There was no statistically significant association between abortion history among cows(one yearperiod) and positive MAT. Thus it was concluded that the leptospiral infection of cows may play a role for human infection, and the leptospiral infection of cow may not be the major cause of abortion although further study is necessary for definite conclusion. 경기도의 19부락에서 1989년 5월에 459두와 그해 11월에 446두의 소를 대상으로 하여 렙토스피라 감염유무를 조사하였다. 혈액배양에서는 포모나 항체에 강하게 반응하는 한 균주만이 검출되었다. 몇개의 표준균주를 사용한 혈청검사에서는 5월에 12%, 11월에 26%의 양성율을 나타내었다. 년령이 증가함에 따라 양성율이 높아졌으며 숫소가 암소보다 높았다. 혈청검사 양성과 소의 유산력과는 유의적인 관계가 인정되지 않았다.

녹색형광단백질 유도 발현으로 형질전환 복제개 생산

이병천,Lee, Byeong-Cheon 한국과학기술단체총연합회 2011 과학과 기술 Vol.508 No.-

항일유적지내 조경수목 식재 실태와 대책

이병천,Lee, Byeong-Cheon 한국조경수협회 2001 造景樹 Vol.63 No.7

중촌철 저 ( 中村哲 著 ) 안병직 역 ( 安秉直 譯 ) 세계자본주의와 이행의 (移行) 이론 - 동아시아를 중심으로 -

이병천,이영훈,김수행 ( Byeong Cheon Lee,Young Hun Lee,Soo Haeng Kim ) 경제사학회 1991 經濟史學 Vol.15 No.-

젖소 동결수정란의 비외과적 이식시 수란우의 혈장 progesterone, estradiol-17β치 및 혈청화학치가 수태율에 미치는 영향

이병천,조충호,황우석,Lee, Byeong-cheon,Jo, Choong-ho,Hwang, Woo-suk 대한수의학회 1989 大韓獸醫學會誌 Vol.29 No.4

A total of 13 synchronized dairy cattle(Holstein) were used to determine pregnancy rates in relation to plasma progesterone, estradiol-$17{\beta}$ levels and serum chemical values on the day of last $PGF_{2{\alpha}}$ injection and day of frozen/thawed bovine embryo transfer. The pregnancy rate of recipients with 1.0~4.0ng/ml of progesterone levels at the day of last $PGF_{2{\alpha}}$ injection was higher than that of recipients with below 1.0ng/ml or above 4.0ng/ml of progesterone levels. On the day of transfer, optimal progesterone levels were between 1.0ng/ml and 4.0ng/ml coinciding with a pregnancy rate of 88.9%. Pregnancy rate decreased when progesterone levels were below 1.0ng/ml(33.3%) or above 4.0ng/ml(0%). Corpus luteum grade did not affect pregnancy rate and this result revealed that manual palpation of corpus luteum was not valid criterion of corpus luteum function. Progesterone levels as well as pregnancy rate did not significantly differ whether the corpus luteum was on the right($1.62{\pm}1.33ng/ml$; 63.5%) or left ovary($1.99{\pm}0.61ng/ml$; 85.0%). Estradiol-$17{\beta}$ levels were not significantly different between pregnant and nonpregnant recipients, but estradiol-$17{\beta}$ levels($82.2{\pm}13.5$ VS. $72.3{\pm}10.1pg/ml$) were higher at below 1.0ng/ml of progesterone, and pregnancy rates(33.3 VS. 80%) tended to be lower than above 1.0ng/ml of progesterone. Total cholesterol levels on the day of last $PGF_{2{\alpha}}$ injection and day of transfer did not affect pregnancy rate. Calcium and inorganic phoshorus levels belonged to normal range in most of the recipients. These range did not affect pregnancy rate. In reviewing above results, plasma progesterone levels(1.0~4.0ng/ml) at the time of transfer are diagnostic value for screening recipients prior to transfer of frozen/thawed bovine embryos.

유치원과 초등학교 영어교육과정 비교연구

이병천 ( Byeong Cheon Lee ) 한국현대영어영문학회 2009 현대영어영문학 Vol.53 No.4

This study was intended to investigate the connectedness of the English curriculum at private kindergartens and elementary schools based on the analysis of the document system and the implementation of the curriculum. In this study, the connectedness of the English curriculum of the educational systems was presented, analyzed, discussed and summarized dealing with the goals and contents which include the levels of words and sentences, activities, textbook units, and language skills, vocabularies, and the length of a single sentences. The main findings and implications from this study can be briefly noted as follows: (1) There needs the voluntary adjustment for the levels of words and sentences presented in elementary English textbooks according to students` familiarity and authenticity. (2) English teaching and learning should be accomplished focused on thought groups rather than words. (3) For the young learners of English in elementary schools to develop more interest and motivation toward English, the curriculum should present the techniques and activities for meaningful repetitions and practices and should consider the connectedness to Kindergarten English curriculum. (Korea Institute for Curriculum & Evaluation)

조선후기 상품유통과 여객주인 ( 旅客主人 )

이병천 ( Byeong Cheon Lee ) 경제사학회 1983 經濟史學 Vol.6 No.-

영어교과 평가의 성취기준 비교 분석

이병천 ( Lee Byeong Cheon ) 한국중등영어교육학회 2018 중등영어교육 Vol.11 No.4

The purpose of this study is to provide suggestions for the ways of presenting Achievement Standards(AS) in National English Curriculum. To achieve the purpose of this study, foreign language national curricula of two countries were analyzed. The curricula of Finland and Singapore were selected based on the grounds that Finland has slimming curricular while Singapore has an independent volume with elaborated explication on the curriculum. The criteria for the analysis include the structure and connectedness of the AS, the level of elaboration, the content areas connecting to the AS, and the ways of connecting AS to the English subject key competences. The several main findings from the analysis include the following: First, the curricular include culture with integrating four language skills and attitudes, which enables content areas to maintain coherence with AS; Second, content areas and assessment standards are aligned with educational objectives, educational contents, and evaluation; Third, English subject key competences in the two countries are interconnected with subject content areas and assessment items, while 2015 English national curriculum often has been criticized for the lack of this connectedness. Based on these findings, some discussions are made along with the limitations of the study.

외부경제, 사회적 분업, 산업세계의 다양성 : 마샬의 『경제학원리』와 숲의 경제학

이병천(Lee Byeong Cheon) 韓國經濟發展學會 2016 經濟發展硏究 Vol.22 No.1

마샬 경제학은 주류와 비주류라는 두 개의 얼굴을 가지고 있다. 비주류 마샬은 경제사상사에서 보기 드물게 경쟁과 협력의 혼합에 기반한 산업조직론과 사회적 분업의 조정시장경제론을 제창했다. 마샬에서 외부경제는 그 이론의 핵심에 자리잡고 있는 집단적 수익체증의 개념이다. 이 논문을 마샬의 대표 저작인 『경제학원리』의 분석을 통해 마샬 외부경제론의 내용과 산업세계의 다양성론 및 경제민주화론의 기초로서 그 현재적 의의를 밝힌다. 또한 마샬이 해결하지 못한 이론적 공백과 결함에 대해 지적하고 마샬을 넘어선 마샬로 나아가기 위한 몇가지 방향을 제시한다. Marshall's economics has two faces of mainstream and non-mainstream. Nonmiinstream Marshall is a scholar of great rarity in the history of economic thought, who proposed the theory of industrial organization and social division of labor based on the compertiton and cooperation blended. marshallian external economies are the concept of collective increasing returns located in the heart of the theory. The paper says the contents and significances of Marshallian external economies through the analysis of [Principles of Economics]. In addition, pointing out the theoretical missing links and defects Marshall did not resolve, the paper proposes some ideas for "Marshall beyond Marshall" in the theory of the external economies.

혼합어를 사용한 동기적인 CMC의 활용이 초등학교 영어 학습자의 문자 중심 의사소통능력 향상에 미치는 영향

이병천(Lee Byeong Cheon) 새한영어영문학회 2004 새한영어영문학 Vol.46 No.3

This paper examines the effects of synchronous computer mediated communication(CMC) on the text-based communicative ability of students of English in an elementary school. Two classes of about 25 students were divided into two levels (high and low) using a written test on communicative ability. One class was given a session of task-based synchronous CMC in which task-based assignment was given to the class five days each week. The subjects of the experimental class performed the task through synchronous CMC interactions with their peers. The second class was not given the task-based synchronous CMC, but performed the task by themselves. The results indicated that 1) a significant difference in the rate of improvement appeared in the synchronous CMC class; 2) the rate of improvement in the achievement of each question item (including the two core elements) varied according to the two different levels; 3) a significant difference in the rate of improvement appeared in the high-level group learners within an experimental class. This suggests that task-based synchronous CMC in elementary school 6th graders offers benefits in the growth of text-based English communicative ability, especially in high-level learners of English.