• Title/Summary/Keyword: Science Experiment

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The Effect of the 'Chemistry and Experiment' Course Employing Small-Scale Chemistry on Pre-service Elementary Teachers' Attitude toward Laboratory Work and Science Teaching Efficacy (Small-Scale Chemistry를 적용한 '화학 및 실험' 강좌가 초등 예비 교사의 실험 활동에 대한 태도 및 과학 교수 효능감에 미치는 효과)

  • Yoon, Hee-Sook;Yoo, Mi-Hyun
    • Journal of Korean Elementary Science Education
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    • v.26 no.4
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    • pp.449-458
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    • 2007

  • The purpose of this study was to investigate the effect of the 'Chemistry and Experiment' course employing the Small-Scale Chemistry(SSC) experiment on the 30 pre-service elementary teachers' attitude toward laboratory work and their science teaching efficacy. This study also examined the perception of the pre-service elementary teachers about the SSC experiment. In the result, there were found significant interactions between the treatment and prior level in attitude toward laboratory work. The attitude toward laboratory work of low-level pre-service teachers was improved while that of high-level pre-service teachers remained unchanged. However, there was no significant change in their beliefs regarding science teaching efficacy. Through the analysis of questionnaire, it was also found that they had positive perceptions about the SSC experiment, and most of them as pre-service teachers found the SSC experiment helpful to teach chemistry experiments.

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Hanwoo cattle: origin, domestication, breeding strategies and genomic selection

  • Lee, Seung-Hwan;Park, Byoung-Ho;Sharma, Aditi;Dang, Chang-Gwon;Lee, Seung-Soo;Choi, Tae-Jeong;Choy, Yeon-Ho;Kim, Hyeong-Cheol;Jeon, Ki-Jun;Kim, Si-Dong;Yeon, Seong-Heum;Park, Soo-Bong;Kang, Hee-Seol
    • Journal of Animal Science and Technology
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    • v.56 no.1
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    • pp.2.1-2.8
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    • 2014

  • Hanwoo (Korean cattle) is the native, taurine type of cattle breed of Korea and its history as a draft animal dates back to 5000 Years. In earlier times Hanwoo was used extensively for farming, transportation. Over the period of time, Hanwoo has changed to be meat type cattle. Full-scale production of Hanwoo as meat-type cattle has occurred since 1960s with the rapid growth of the Korean economy. Hanwoo is one of the most economically important species in Korea as it is a significant source of nutrition to the Korean people. Hanwoo beef is the most cherished food of Korea. One of the main goals of researchers is to increase the meat quality, quantity and taste of the beef. In this review we describe the origin, domestication of Hanwoo cattle and breeding program initiated from 1980's. Moreover the advent of technological advancement had provided us a platform to perform genome wide selection on economic traits and its implementation into traditional breeding programs.

  • https://doi.org/10.1186/2055-0391-56-2 인용 PDF KSCI

Studies on the Cultivation Establishment of Sprouted Seedling for Machine Transplanting of Rice Plant II. Optimum Days of Raising Sprouted Seedling and Effects of Endosperm Rate on Rice Growth in Paddy Field (벼 출아묘 기계이앙 재배기술 확립에 관한 연구 II. 벼출아묘 육묘온도에 따른 적정육묘일수 및 배유양분 잔존량이 초기생육에 미치는 영향)

  • Yang W. H.;Yun Y. D.;Song M. T.;Lee M. H.;Lim M. S.;Park R. K.
    • Proceedings of the Korean Society of Crop Science Conference
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    • 1989.10a
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    • pp.20-21
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    • 1989

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