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- 저자 : 최규환(Gyu-Hwan Choi) (검색결과 6 건)
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이광재,노정석,최흥식,김장환,최규환,신헌석,Lee, Kwang-Jae,Roh, Jung-Suk,Choi, Houng-Sik,Kim, Jang-Hwan,Choi, Gyu-Hwan,Cynn, Heon-Seock 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.4
Purpose: This study is to identify how eye movement influences the static balance and fall efficacy of the elderly who have experienced fall-related injuries. Methods: Thirty nine elderly who scored 24 points in the Korean mini mental state examination, were able to walk, and had no specific disease, were selected as the research subjects among elderly who have experienced fall-related injury more than once in the past year. Thus, 20 for the experimental group, and 19 for the control group were selected as subjects. The experiment was conducted for 6 weeks, including periods of evaluation before and after intervention. Results: The results with respect to the dependent variables are as follows: Substitute sample t-testing showed significant differences between each group in eye movement to check difference in balance performance and fall efficacy. When independent sample t-tests were conducted to compare static balancing performance and fall efficacy between the two groups after intervention, they showed significant differences in statistical terms (p<0.05). Conclusion: From the above results of the study, it was found that the application of eye movement combined with diverse fall prevention programs is effective, when enhancing static balance performance power and improving fall efficacy.
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RUSLE 공식을 이용한 경사지 농경지의 토양유실 분석
김소래 ( Sorae Kim ),장민원 ( Min-won Jang ),유찬 ( Chan Yu ),최규환 ( Gyu-hwan Choi ),정환봉 ( Hwan-bong Jeong ),장은정 ( Eun-jeong Jang ),이상환 ( Sang-whan Lee ),지원현 ( Won-hyun Ji ) 한국농공학회 2017 한국농공학회 학술대회초록집 Vol.2017 No.-
급경사지 농경지에선 작토층의 토양과 유기물, 영양분 등의 유실이 쉬워 작물 생산성이 저하되고 가뭄 취약성이 높아지는 문제가 발생한다. 강우나 바람 등의 기상작용에 의한 침식발생은 일반적으로 논에 비해 밭에서 현저히 높다. 특히 고랭지 밭은 경사도 및 해발이 높은 곳에 위치하기 때문에 적은 강우에도 토사유출이 심하고 수직경운, 잦은 객토와 연작 등에 따라 토양유실이 많다. 토양유실의 발생은 오염토양복원 현장에서는 더욱 큰 문제를 야기할 수밖에 없다. 현재 광해로 인한 오염 농경지에서 주로 적용되고 있는 복원공법은 크게 오염토양에 대한 환토 혹은 복토공법이다. 특히 복토법은 복원공법에서 차지하는 비중이 큰 데 복토층 토양유실은 하부 오염토층의 지표노출과 오염성분의 누출 위험이 있다. 본 연구는 토양개량복원사업이 진행되고 있는 동아광산지구의 급경사지 농경지를 대상으로 범용토양유실예측공식(RUSLE)을 이용하여 복토사업 전후의 필지별 토양유실평가 및 토양침식위험을 비교·분석하였다. 그 결과 대상지역 전체에 걸친 평균 토양유실량은 사업전 약 127.85 ton/ha/yr, 사업후 약 310.57 ton/ha/yr로 약 2.4배 증가하였고, 토지이용별 평균 토양유실량은(사업전, 사업후) 논(0.13 ton/ha/yr, 0.31 ton/ha/yr), 밭(154.78 ton/ha/yr, 310.57 ton/ha/yr)로 복토사업 후 많은 양의 토양유실이 발생하며, 특히 대부분의 유실이 밭에서 발생하는 것으로 나타났다. 농업과학기술원의 토양침식위험기준에 따라 토양유실등급을 분류한 결과 매우심함(50 ton/ha/yr 이상) 등급으로 분류된 면적이 사업전 17.27 ha, 사업후 24.25 ha로 각각 전체면적의 54.74%, 76.86%의 매우 심각한 수준으로 복토사업 전후 모두 많은 양의 토양유실이 발생하는 것으로 나타났다.
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박정섭(Jeong-Seob Park),배재오(Jae-O Bae),최규환(Gyu-Hwan Choi),정봉우(Bong-Woo Chung),최동성(Dong-Seong Choi) 한국식품영양과학회 2011 한국식품영양과학회지 Vol.40 No.1
22종의 고구마에 대한 총 페놀함량 및 항돌연변이원성을 평가하였다. 17종의 비자색고구마 중 수, 하얀미, 신황미 품종의 총 페놀함량이 21.4, 21.5, 20.3 ㎍(GEA/g dried sweet potato)으로 가장 높았으며, 맛나미와 연황미 품종에서 4.6과 4.8 ㎍으로 가장 낮았다. 5종의 자색고구마에서 총 페놀함량은 자미 품종이 128.3 ㎍으로 가장 높았으나, 신자미 품종에서 44.9 ㎍으로 가장 낮았다. 1-NP, daunomycin, Trp-P-1, Trp-P-2, 2-AA에 의해 돌연변이가 유도된 S.Typhimurium TA 98과 1-NP에 의해 돌연변이가 유도된 S.Typhimurium TA 100에 있어서 돌연변이 억제효과는 고구마 메탄올 추출물은 대체적으로 효과적이었으며, 자색고구마에 있어서는 자미와 아야무라사키 품종에서 높았다. 총 페놀함량이 많은 자색고구마는 2-AA에 대해서만 높은 돌연변이 억제효과를 나타내었을 뿐 1-NP, daunomycin, Trp-P-1, Trp-P-2에 대해서는 비자색고구마와 뚜렷한 차이를 보이지 않았다. 자색고구마 품종 간에 있어서는 총 페놀함량이 많을수록 돌연변이 억제효과가 높았다. 고구마의 품종별 항돌연변이 효과는 총 페놀 함량보다는 사용된 돌연변이원 및 균주에 따라 좌우되는 경향이었다. Polyphenolic content and antimutagenicity of the methanol extracts prepared from 22 cultivars of sweet potato with different flesh colors were investigated using Folin-Ciocalteu's phenol reagent method and Ames test, respectively. There was a remarkable cultivar difference in the polyphenolic content of sweet potato. Su, Hayanmi and Shinhwangmi among 17 cultivars of non-purple sweet potato had higher polyphenolic contents of 21.4, 21.5 and 20.3 ㎍ (GAE/g dried sweet potato), respectively, whereas Manami and Yeonhwangmi were very much lower at 4.6 and 4.8 ㎍. Mokpo No.62, Borami, Sinjami, Jami and Ayamurasaki had much higher polyphenolic contents of 67.7, 76.9, 44.9, 128.3 and 93.2 μg, respectively, than non-purple sweet potato. The methanol extract from the sweet potato effectively inhibited the reverse mutation induced by 1-NP, daunomycin, Trp-P-1, Trp-P-2 and 2-AA on S. Typhimurium TA 98, and by 1-NP on S. Typhimurium TA 100. These results suggest that the antimutagencity properties may be influenced by the tested mutagen and strain rather than the polyphenolic content of non-purple and purple sweet potato. However, in the purple sweet potatoes, a high polyphenolic content may influence the antimutagencity properties.
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고지연(Ko Jee Yeon),송석보(Song Seok Bo),최명은(Choe Meyong Eun),곽도연(Kwak Do Yeon),최지명(Choi Ji Myeong),우관식(Woo Koan Sik),윤건식(Yoon Gun Sik),최규환(Choi Gyu Hwan),김용순(Kim Yong Soon) 한국육종학회 2018 한국육종학회지 Vol.50 No.3
‘Geumsilchal’ is a Proso millet (Panicum miliaceum L.) variety developed and registered by the Department of Southern Area Crop Science, NICS, RDA, in 2014. This variety was developed through pure line selection from K131247. ‘Geumsilchal’ was an erect type medium-maturing variety. Its growing period was 104 days when it was seeded on May 15, and 94 days when it was seeded on July 15 in Milyang, Korea. The culm length of ‘Geumsilchal’ was about 123 cm, which was 13 cm longer than that of the standard variety ‘Hwanggeumgijang’. ‘Geumsilchal’ was tolerant to lodging in the field because of its wide column width and erect plant type. The panicle type was droopy and its length was about 23 cm. Seed grain and dehusked grains were yellow, and the endosperm characteristic was glutinous. The yield potential of ‘Geumsilchal’ was about 2.41 ton ha⁻¹ in regional yield trials from 2013 to 2014 and was 27% higher than that of the standard variety ‘Hwanggeumgijang’ (Variety registration No. 6247).
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윤건식(Geon-Sig Yun),이재웅(Jae-Wung Lee),황세구(Se-Gu Hwang),김익제(Ik-Jei Kim),홍성택(Seong-Taeg Hong),최명은(Myeong-Eun Choe),최규환(Gyu-Hwan Choi),김용순(Yong-Soon Kim),김홍식(Hong-Sig Kim) 한국육종학회 2019 한국육종학회지 Vol.51 No.4
To improve their income, farmers should cultivate sorghum varieties with high productivity, short breeding period, and easy double cropping. To increase purchases by consumers, the sorghum variety must have health-related functions. To meet these demands, the Cheongpung variety has been raised through net separation from the traditional species of the Chungbuk region as a sorghum variety that can be harvested by machine, have the highest yield in the country, and have the most abundant antioxidant content. The seed coat of ‘Cheongpung’ was reddish-brown, and had the characteristic of early maturation; it required only 107 days from sowing to harvest. Its culm length was 89 cm, the smallest among domestic cultivated varieties. It could also be harvested by machine without difficulty. Compared with the ‘Hwanggeumchal’ variety, the number of ear per plant in ‘Cheongpung’ was approximately 1.3, but each ear piece weighed 66.2 g, weighing 3.8 g, and the thousand-grain weight was 1.4 grams higher than the rough-grain weight. A local adaptation test in five regions nationwide for two years led to a ‘Cheongpung’ yield of 359 kg/10a, which was the highest among domestic cultivated varieties. In addition, the polyphenol content of ‘Cheongpung’ was 29% higher than that of ‘Hwanggeumchal’. (Registration No. 7717)
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