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감성돔(Acanthopagrus schlegelii) 및 참돔(Pagrus major) 치어에 대한 이산화염소(ClO<sub>2</sub>)의 급성 독성
이옥 ( Ock Lee ),서준혁 ( Junhyuk Seo ),서형원 ( Hyoungwon Seo ),장다희 ( Dahee Jang ),이재만 ( Jaeman Lee ),최태건 ( Taegun Choi ),박정환 ( Jeonghwan Park ) 한국수산과학회(구 한국수산학회) 2020 한국수산과학회지 Vol.53 No.3
This study evaluated acute toxicity of chlorine dioxide (ClO<sub>2</sub>) to juveniles of black seabream Acanthopagrus schlegelii (19.4±2.3 g, 10.7±0.4 cm) and red seabream Pagrus major (74.9±8.2 g, 15.9±1.0 cm). Thirty juveniles for each species were exposed to target ClO<sub>2</sub> concentrations of 0, 0.05, 0.1, 0.125, 0.15, 0.2, 0.3, 0.4, and 0.5 mg/L in triplicate for eight days. Half lethal concentrations for 96 hours were found at 0.14 and 0.24 mg ClO<sub>2</sub>/L for black seabream and red seabream, respectively. Red seabream larger than black seabream in body weight appears to be more resistance to chlorine dioxide. However, regardless of species or size, specific loading rates of chlorine dioxide to total fish weight (daily feeding amount of ClO<sub>2</sub> /total fish weight) were similar, showing 1.3 and 1.1 g ClO<sub>2</sub>/kg fish·day<sup>-1</sup> for black seabream and red seabream.
저소득층 아동을 위한 혼합연령 방과후 프로그램 개발 연구
이영자(Young Ja Lee),이종숙(Jong Sook Lee),이옥(Ock Rhee),신은수(Eun Soo Shin),이정욱(Jeong Wuk Lee) 한국아동학회 1999 兒童學會誌 Vol.20 No.4
The present study researched the development of a mixed-age after school program with a focus on the facilitation of emotional intelligence for low SES children. The model program was based on the Mayer and Salovey (1997) theory of emotional intelligence. Activities for 17 sessions were constructed on the basis of 43 objectives. The program was implemented with 53 children in the after school program classes of one elementary school in Kyuggi Province for 6 months. Participants were from low SES families, grouped into 3 mixed-age (K-3rd grade level) classes. Evaluation of the program showed positive effects on the development of children`s emotional intelligence. Validity and appropriateness were discussed.