전남지역 무논점파재배 파종시기별 수량성 및 쌀 품질 변이

민현경,이인,안규남,신서호,권오도,박흥규 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

Nitrogen Availability Strongly Affects Productivity of Ratoon Rice Plants

민현경,신세호,권오도,최우정,김한용 한국토양비료학회 2018 한국토양비료학회지 Vol.51 No.3

Warming trends and concomitant increases in frost-free period are expected to alter cropping systems and subsequent land productivity in temperate climate regions. Our agricultural and food systems need to adapt to such changes. Here, we examined how nitrogen (N) availability would affect productivity of rice double cropping in combination with its ratoon regenerated from their parents rice plant (Oryza sativa, cv. Jomyeong) with early maturing habit. For main cropping season, rice plants were transplanted in experimental paddy field (35°10'N, 26o53'E, alt. 33.0m) of Chonnam National University, on April 25, 2016, and grown under local farmers’ agronomic practices. After main crops harvested on August 17, ratoon rice plants were grown at five different levels of N availability [0 (N0), 9 (N9), 18 (N18), 28 (N28) and 37 (N37) kg N ha-1] and harvested on November 20. Unexpectedly, plant height of ratoon rice was unaffected by N availability. However, aboveground biomass (AGB) and yield of ratoon rice were significantly affected by N availability, displaying an increase of 56.5 kg ha-1 and 26.3 kg ha-1 per unit (1 kg ha-1) increase in N fertilization, respectively. As a result, while at N0, the AGB and yield of ratoon rice plants were 4.14 t ha-1 and 1.46 t ha-1, respectively, they increased to 6.32 and 2.35 t ha-1 at N37, corresponding to 47% and 41% of those (i.e. 13.39 t ha-1 in AGB and 5.68 t ha-1 in yield) of main rice plants. Under high N availability, the greater number of regenerated tillers and panicle per m2 contributed to greater ratoon rice productivity. Combined annual productivity of the main and ratoon seasons ranged from 17.5 to 19.7 t ha-1 for AGB and from 7.1 t to 8.0 t ha-1 for yield depending on N availability. The results suggest that ratoon rice double cropping could provide an ample opportunity to consolidate national food security in the warming world by increasing annual land productivity.

Porphyran-청국장 추출물의 암세포 성장 억제효과

민현경(Hyun-Kyeng Min),김효주(Hyo-Ju Kim),장해춘(Hae Choon Chang) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.7

김 가공 후 발생되는 자투리 김으로부터 porphyran을 추출(13.9% 수율)하고, 이를 청국장에 첨가하여 porphyran-청국장을 제조하고 이의 항암활성을 조사하였다. Crude porphyran의 암세포에 대한 증식억제효과는 AGS와 HT-29에서 모두 농도가 증가할수록 농도 의존적으로 높은 억제율을 나타내었다. Crude porphyran의 정상세포 BJ에 대한 세포독성은 거의 없는 것으로 관찰되었으며 0.25 ㎎/mL의 농도까지는 농도 의존적으로 세포성장효과를 보였다. Bacillus subtilis DJI으로 제조한 청국장의 물 추출물과 메탄올 추출물의 세포증식에 미치는 효과를 살펴보았다. 정상세포 BJ에 대해 청국장 물 추출물의 경우 0.5 ㎎/mL의 농도에서는 최고 153%의 생존율을 나타냈으며, 메탄올 추출물의 경우 동일 농도에서 140%의 생존율을 보여 청국장이 정상세포에 대해 세포성장효과가 있는 것으로 관찰되었다. Porphyran-청국장의 정상세포 BJ에 대한 세포독성을 관찰한 결과 물, 메탄올 추출물 모두 독성이 없었으며, 물 추출물의 경우 1.0 ㎎/mL 농도 처리 시 160%, 메탄올 추출물의 경우 0.25 ㎎/mL에서 최대 127%의 생존율을 보이므로 porphyran-청국장이 정상세포에 대해 세포독성이 없는 것으로 관찰되었다. 청국장 추출물과 porphyran-청국장 추출물의 암세포 증식 억제효과를 농도 1.0 ㎎/mL 구간에서 비교해보았을 때 porphyran을 첨가하지 않은 청국장 물 추출물에서 최고 17%, 메탄올 추출물은 24%의 AGS 세포증식억제효과를 나타내는 것에 비해, porphyran-청국장의 물 추출물과 메탄올 추출물은 최고 23%와 38%의 세포증식 억제효과를 각각 나타내었다. 장암세포 HT-29에 대해서는 porphyran을 첨가하지 않은 청국장 물 추출물에서 19%, 메탄올 추출물은 27%의 세포증식억제효과를 나타내는 것에 비해 porphyran-청국장의 물 추출물과 메탄올 추출물은 최고 27%, 32%를 각각 나타내었다. 이로부터 청국장과 porphyran-청국장의 물 추출물보다 메탄올 추출물이 더 높은 항암활성을 나타내며, 청국장보다 porphyran-청국장이 1.2∼1.5배 더 높은 암세포 성장 억제율을 나타냄을 알 수 있었다. 본 실험에서 김으로 부터 유용한 기능을 가지고 있는 porhyran을 추출하여 항암활성 기능을 가지는 porphyran-청국장을 제조하여 그 우수성을 확인하였다. 앞으로 이러한 기능성 식품을 널리 이용하여 해조가공산업에 기여하고 부가가치를 향상시켜 새로운 소비를 창출할 수 있을 것으로 기대된다. The effects of porphyran-chungkookjang on cytotoxicity of human normal cell line (BJ) and human cancer cell lines (AGS and HT-29) were examined. Porphyran, which was prepared from laver (Porphyra yezoensis), decreased the viability of the cancer cells, however, it did not affect the viability of normal cells. Porphyranchungkookjang was prepared by the addition of 5% (w/w) porphyran into chungkookjang which was fermented by starter, Bacillus subtilis DJI. The cytotoxicity effects of the chungkookjang and porphyran-chungkookjang were evaluated with MTT assay. The methanol and the water extract of porphyran-chungkookjang at 1.0 ㎎/mL showed 23~38% decreases in proliferation of cancer cells (AGS and HT-29). However, the methanol and the water extracts of porphyran-chungkookjang did not inhibit the growth of normal cell. Moreover, the methanol extract of porphryan-chungkookjang at 1.0 ㎎/mL showed 1.2~1.5 fold higher anticancer effects than that of the chungkookjang.

벼 무논점파재배 파종시기별 피 엽령 변이 및 제초제 처리시기 설정

민현경(Min H. K),이인(I. Lee),안규남(G. N. An),신서호(S. H. Shin),권오도(O. D. Kwon),박흥규(H. G. Park),국용인(Y. I. Kuk) 한국잡초학회 2016 한국잡초학회 별책(학술대회 초록집) Vol.36 No.2

남부 평야지 벼 등숙기 기상환경에 따른 품종별 수량성 변이

이인,민현경,안규남,신서호,권오도,박흥규 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

비료·농약 혼합제 처리에 따른 벼 생육 및 수량에 미치는 영향

권오도,안규남,민현경,이인,신서호,박흥규,이준석 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

연구개발사업 평가에 관한 문헌 연구

홍대근,서의호,민현경 한국경영과학회 2010 한국경영과학회 학술대회논문집 Vol.2010 No.10

Evaluation of R&D links engineering, science and management disciplines to plan, to develop, and to implement technological capabilities to shape and accomplish the strategic and operational goals of an organization. This paper surveys research & development(R&D) evaluation using a literature review and classification of articles from 1970 to 2009 with keyword index in order to explore how R&D evaluation have developed in this period. Based on the scope of 105 articles of R&D evaluation, this paper surveys and classifies R&D evaluation using the three layers: Research, R&D, and Evaluation. The goal of this paper is to look back at literatures that were published in journals, suggest new classification framework of R&D evaluation, and see each feature of classification framework. We think that this paper allows researchers to extract several lessons learned that are important for R&D evaluation.

풍력발전시설 소음 측정 방법에 대한 고찰

이영진,이종태,민현경,권선용,이병찬 한국환경영향평가학회 2023 환경영향평가 Vol.32 No.5

Recently, as wind farms using wind power as new and renewable energy have been installed nationwide, noise problems have emerged. The environmental impact assessment and postenvironmental impact assessment also require the measurement of background noise and lowfrequency noise for wind farms, especially by applying the living noise measurement method according to the low-frequency noise management guidelines issued by the Ministry of Environment in 2018. Due to the nature of wind power generators that generate loud noise in high winds, noise measurement should be made at high winds, but when wind speed increases, wind noise increases and living noise and low-frequency noise are not properly evaluated. Therefore, the type of noise generated by wind power generators was confirmed, and matters to be considered when measuring wind noise such as wind noise were confirmed.

벼 유기재배 연차별 토양 및 수량성 변이

안규남,이인,민현경,신서호,권오도,박흥규 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

전남 유통 브랜드쌀 품질의 연중 및 연차 변이 특성

안규남,이인,신서호,민현경,권오도,박흥규,신해룡,김한용 한국작물학회 2017 한국작물학회지 Vol.62 No.2

This study was conducted to analyze seasonal and annual variations in rice quality and factors affecting the quality, for quality evaluation of the brand rice varieties produced in Jeonnam region. Coefficient of variation (CV) values for the seasonal variation in the rice quality were 3.1% in Toyo value, 2.1% in whiteness, 1.6% in protein content, 1.0% in moisture content, and 0.4% in head rice ratio. Quality characteristics of the brand rice varieties generally showed a decreasing tendency after April, as the months progressed. CV values for the annual variation in the rice quality were relatively high at 5.6% in protein content and 5.2% in Toyo value whereas those for whiteness and head rice ratio were relatively low, at 2.7% and 1.8%, respectively. Palatability and protein content showed high correlations with minimum air temperature, sunshine hours, rainfall, and daily temperature range. Head rice ratio had a negative correlation with daily temperature range whereas chalky rice ratio had a positive correlation with rainfall. Based on these results, we formulated a multiple regression equation to estimate palatability of cooked rice using protein content, whiteness, head rice ratio, and moisture content as follows:y =-6.71a + 2.27b + 1.29c + 0.51d - 15.34 (R2=0.51*)(y: palatability of cooked rice, a: protein content, b: moisture content, c: whiteness, d: head rice ratio).