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생물 관련 야외체험활동을 통한 대학생의 경험 탐색:학업적 흥미 및 진로선택을 중심으로
김충용,김선영 제주대학교 교육과학연구소 2021 교육과학연구 Vol.23 No.2
This study explored the effect of outdoor activities on academic interests and career choice of college students majoring in biology. The outdoor activities consisted of three times of outdoor collection of various plants and animals during spring, summer, and autumn, and exhibition. This study used a qualitative methodology with questionnaires and in-depth interviews. As results, the participants were divided into three groups; a group whose academic interest in biology greatly aroused: a group that arose academic interest in biology with further choice of career: a group that did not generate any academic interest. The students who arose academic interests mentioned that they could see, hear, and learn about life-related things in person; had a chance of acquiring biological knowledge; and further became consider a future career in biology area. However, some students mentioned that outdoor activities did not arouse any academic interest in biology. Instead, they generated their interest in forming social and community relationships. 본 연구는 야외체험활동의 경험이 대학생들의 학업적 흥미 및 진로선택에 어떠한 영향을 미치는지 살펴보았다. 연구대상은 광역시 소재 생물학과에 재학하는 총 13명의 학생으로 야외체험활동에 1년 동안 참여하였다. 심층면담과 수기형식의 설문지를 활용하여 질적자료를 수집하였다. 질적자료는 면담 자료, 수집된 수기형식의 설문지의 답변의 공통된 범주를 추출하는 반복적 비교분석법을 통해 분석되었다. 연구결과, 야외체험활동을 통하여 생물학에 대한 학업적 흥미가 유발된 그룹, 생물학에 대한 학업적 흥미가 높게 유발됨과 동시에 나아가 진로를 선택하는데 영향을 받은 그룹, 생물학에 대한 학업적 흥미가 유발되지 못한 그룹으로 나누어졌다. 학업적 흥미가 유발된 그룹의 학생들은 ‘직접 체험’, ‘새로운 경험’의 상황적 흥미 범주와 함께, ‘지식의 습득’, ‘생물학에 대한 흥미’의 개인적 흥미 범주를 언급하여 생물학에 대해 비교적 지속적으로 유지되는 관심과 선호도를 나타냈다. 또한, 야외체험활동은 대학생들의 생물학과 관련된 진로선택에도 직·간접적 영향을 끼치는 것으로 나타났다.
Formaldehyde 가스 흡입에 의한 마우스의 급성독성 및 소핵 유발성에 관한 연구
김충용,김균,심점순,김용화,노정구,Kim, Choong-Yong,Kim, Kyun,Shim, Jeom-Soon,Kim, Yong-Hwa,Roh, Jung-Koo 한국독성학회 1991 Toxicological Research Vol.7 No.1
The acute and genetic effect of formaldehyde on mice through inhalation route was studied. The Riley's chamber with one stack of cage was used for the exposure and the micronucleus test was performed under unprecedently maximum exposure concentration. LC50's of formaldehyde in mice by whole body exposure for 4 hours were 105.5 ppm with 95% confidence interval of 72.6 ppm and 143.2 ppm for male, and 159.2 ppm with 95% confidence interval of 116.5 ppm and 272.7 ppm for female. Cinicial symptoms by acute exposure were salivation, lacrimation, and abnormal respiration.
청목향 Aristolochiae radix에 있어 F344 랫드의 독성
김충용,김용범,양병철,이종화,정문구,양기화,장동덕,한상섭,강부현,Kim, Choong-Yong,Kim, Yong-Bum,Yang, Byung-Chul,Lee, Jong-Hwa,Chung, Moon-Koo,Yang, Ki-Hwa,Jang, Dong-Deuk,Han, Sang-Seop,Kang, Boo-Hyon 대한수의학회 2005 大韓獸醫學會誌 Vol.45 No.1
13-week orally repeated dose toxicity was investigated to ascertain the toxic effects of Aristolochiae radix in F344 rats at dose levels of 0, 1 (0.003 AA, aristolochic acid, mg/kg), 5 (0.014 AA mg/kg), 25 (0.068 AA mg/kg), 125 (0.34 AA mg/kg), and 500mg/kg (AA 1.36 mg/kg). No mortalities were found in any of the dose groups including vehicle control groups of both sexes during the study period. Hematologic and serum biochemical examinations revealed no changes related to the test item in any of the dose groups of both sexes. However, gross findings at necropsy implicated thickening of the stomach wall. In histopathological examinations, prominent findings related to the test item treatment were observed in the stomach and urinary bladder. There were squamous cell papilloma, squamous cell hyperplasia, ulceration and erosion observed in the non-glandular stomach. Squamouse cell hyperplasia was observed at dose levels of more than 125 mg/kg in both sexes and squamous cell papilloma was observed at dose level of 500 mg/kg in both sexes. The incidence and severity of these proliferating lesions including squamous cell hyperplasia and squamous cell papilloma increased with dose dependency. Transitional cell hyperplasia was also observed in the urinary bladder at dose levels of more than 25 mg/kg in both sexes and the incidence and severity of the lesion increased with dose dependency. In conclusion, the toxic changes related to the test item treatment were observed in the stomach and urinary bladder, and the no-observed-adverse-effect level (NOAEL) was estimated to be 5 mg/kg/day for both males and females in F344 rats.