• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.25 no.1
• /
• pp.39-46
• /
• 1980

A male sterile facilitated recurrent selection population was developed by the barley breeding team of Yeongnam Crop Experiment Station. To breed this population, three composite cross populations and a composite population of breeding lines in our country were used as the materials. This population was developed in order to breed early maturing, wet-soil tolerant and high yielding barley varieties, adapted for double cropping with rice in southern part of Korea. The population was named by RSPYB#l which means Recurrent Selection Population No.1. of Yeongnam Barley.

• Korean journal of applied entomology
• /
• v.35 no.1
• /
• pp.74-79
• /
• 1996

General esterases were analysed quantitatively and qualitatively to see their role in deltamethrin resistance mechanisms of the diamondback moth, Plutella xylostella L. Selection with 0.1 g of deltamethrin in each generation induced the moth to decrease susceptibility to the insecticide and to increase esterase activities of the fourth instar larvae. Both characters were highly correlated so that the correlation coefficient (r) between LDSo @g) of deltamethrin and esterase activities (~M/min/pg) was 0.9918 (P=0.0082). Nondenaturing PAGE (6%) separated 17 esterase bands from the whole body extracts of the fourth instar larvae. Deltamethrin-selected populations had fewer esterase bands than had the unselected. Four esterase bands (E3, E4, Ell, and E13) were, however, specific to deltamethrin-selected populations.

• Journal of Gifted/Talented Education
• /
• v.22 no.4
• /
• pp.929-942
• /
• 2012

The purpose of this study was to propose for efficient selection with observation and nomination system and efficient operation of Convergence Science class in a Science Institute for Gifted Youth attached in university. For this purpose, we analyzed the result of entrance exam with observation and nomination system, and the correlation between enterance exam score and achievement to perform at the Convergence Science class. As a result, despite observation and nomination system is highly dependent on observers and recommenders, they have very different perspectives each other. In addition it was founded that selection and education process after admission is inconsistent.

• Proceedings of the Korean Society for Applied Microbiology Conference
• /
• 1978.10a
• /
• pp.205.2-205
• /
• 1978

우리나라 전국명지에서 약 1400여점의 토양시료를 채취하여 이 토양 시료에서 방사선균 1635균주를순수분리 배양하고, 명 균주를 배양하여 생산되는 항생물질 중 paper disk method에 의해 벼문고 병균 Pellicularia sasakii에 대한 항균력을 나타내는 균주를 선발하고, 이차선발로서 Dendroid test method와 최종적 선발방법으로 벼를 대상으로 문고병 발생에 대한 green house test에 의하여 우수한 균주를 취득하였다.

• Proceedings of the Korean Society of Grassland Science Conference
• /
• 1999.06a
• /
• pp.77.1-77
• /
• 1999

1996-1998년에 걸쳐 경기 수원, 경북 경산 및 제주에서 수행된 시험결과 우량품종으로 선발된 호밀 품종의 평균 생육특성, 건물수량 및 사료가치는 다음과 같았다. 월동률에 있어서는 대조품종인 Kodiak(91%)과 함께 선발된 품종들은 90-94%로 내한성이 비슷하였다. 숙기에 있어서는 만생종인 Kodiak을 제외하고는 선발된 다른 품종(Oklon 및 Bates)은 모두가 4월 8일에 출수가 시작되어 조생종으로 평가되었다.(중략)

• Proceedings of the Korea Society of Mathematical Education Conference
• /
• 2007.06a
• /
• pp.51-66
• /
• 2007

본 연구에서는 수학영재교육의 정상화라는 측면에서 서울교육대학교 과학영재교육원의 사례를 중심으로 수학과 영재선발 과정 중에서도 수학분야 문항의 분석을 통하여 지원한 학생들의 수학 개념에 대한 반응을 알아보고 영재교육원에 지원하는 학생들의 수학 학습의 문제점을 진단하고, 수학 영재학습 대상자 선발을 위하여 보다 바람직한 수학 문항 개발 위한 개선점에 대하여 알아보았다. 지원자들의 수학 개념, 원리, 법칙에 대한 이해도는 예상보다 매우 낮게 나왔으며 향후 수학영재 선발 문항의 개발에서는 문항의 개발자들이 수학영재 판별을 위한 진지한 고민과 함께 수학영재들의 능력을 적절히 측정할 수 있는 문항을 개발할 필요성을 제기하였다.

• Journal of Animal Science and Technology
• /
• v.52 no.2
• /
• pp.83-90
• /
• 2010

Hanwoo proven bulls have been selected since 1987 and consequently contributed to farmers for the improvement of beef cattle in Korea. The demand for the quality beef production as well as higher production efficiency was erupted after early 2000 as relatively cheap imported beef released. Therefore the pressure on the reformation of selection index for Hanwoo proven bulls have been piled up to furnish with Hanwoo's competitive. A total of 734 progeny test data were analyzed to select traits and their weights in the selection index to meet the beef market requirement. Regression analysis with stepwise selection method was used to select proper trait and its weight for selection index. A series of computer simulation was carried out to compare the currently using selection index with the alternate two selection indices proposed in this study. New selection index using standardized breeding values of Loin eye Muscle Area (LMA), Backfat Thickness (BFT) and Marbling Score (MS) with weight ratio 1:-1:6 was proposed. Results showed higher performance in improving MS and BFT gain by 22% and 31% still holding 86%~89% of genetic gain achieved by current index in Carcass Weight (CW) and LMA when new selection index was fitted. Because, new index has little consideration for production cost, further research should be performed to build selection index including cost and income simultaneously.

• Journal of Gifted/Talented Education
• /
• v.14 no.4
• /
• pp.47-70
• /
• 2004

We analyzed the validity of Science Highschool's selection process for the students from Science Gifted Education Center in order to suggest the direction of improvement. First of all, we invested the students' achievement in Mathematics and Science. As a result, we found that the students are not so good at mathematics and science through the selection process for the students from Science Gifted Education Center. However the difference is not statistically meaningful. On the contrary, The achievement of the students from Science Gifted Education Center is above average who were selected through the other course, e. g. the students who acquired the recommendation of principal, winner of prize in Olympiad of Mathematics or Science. We didn't find any meaningful result in the investigation of Affective Domain in Science. And then we found that the students prefer the generous environment through the selection process for the students from Science Gifted Education Center. As a whole, the selection process for the students from Science Gifted Education Center was not so satisfying. It should be reformed; we should examine the students' portfolio on the activities in the Science Gifted Education Center, and the entrance examination should include both divergent and convergent problems to find out the students' creativity. And the 3 dimensional process is also essential through the multiple steps.

• Korean Journal of Comparative Education
• /
• v.27 no.4
• /
• pp.231-254
• /
• 2017

The purpose of this study was to identify the actual condition and problems of Mongolian teacher quality management of selection and qualification and to recommend improvement. We examined the Mongolian teacher qualification management system with four criteria based on previous research. The results of this study are as follows. Mongolian government established quality management mechanisms such as selection of pre-service teachers, verification of teacher certificate, and appointment of in-service teachers, and teacher qualification standards. These Mongolian teacher selections and qualification systems were operated to attract the manpower required for teaching, to verify their qualifications and to induce professional development. However, the systems have not been able to verify the teachers' ability to practice in the field. We also found that the systems themselves were criticized for failing to guarantee conformity, fairness and transparency. Based on the results of this study, we discussed and draw policy implications for improvement of teacher quality management of selection and qualification in Mongolia.

• Journal of Ginseng Research
• /
• v.13 no.2
• /
• pp.143-146
• /
• 1989

In order to clarify the characteristics of anthocyanln-producing cell line selected by in vitro grown cultures of ginseng (Panax ginseng C.A. Meyer), the calli of anthocyanin-Producing strain were cultured on media supplemented with different concentrations of 2,4-D and sucrose under light or dark condition. The light was found to be essential for anthocyanin synthesis. Anthocyanin synthesis of ginseng cell line was inhibited by the increase of 2,4-D in the medium. On the other hand, sucrose promoted the anthocyanin-production and the optimum concentration of sucrose for the highest production of anthocyanin was 5%. The growth of anthocyanin-producing tell line was best on the medium supplemented with 0.5 mg/l 2,4-D and 5% sucrose.