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‘Dongjanggun’ was developed at the Gyeongbuk Agricultural Research and Extension Services, Taegu in 2000. It was selected among the local varieties gathered korean native chinese chive from 1993 to 1996. It has longer and narrower leaves, stronger flavor than check variety ‘Greenbelt’. And also, contents of ascorbic acid in the leaves of ‘Dongjanggun’ was higher than the ‘Greenbelt’s. Number of tillers per plant was greater in ‘Dongjanggun’ than that in ‘Greenbelt’ during the winter in unheated plastic house. Its growth and regrowing velocity after cutting of top leaves were vigorous. Number of flowers and seeds per umbel were fewer in ‘Dongjanggun’ than in ‘Greenbelt’. Average yield was 6% higher than ‘Greenbelt’s during the thee years. 다수의 국내 재래종 중에서 선발 육성된 ‘동장군’의 주요 특성은 잎이 가늘고 길며, 부추 고유의 향기가 강하고 부추잎의 vitamin C 함량이 높은 품종이었다. 개체당 분얼력이 왕성하고, 예취후 잎의 재생기간이 빠르다. 개화기는 7월 18일로 ‘그린벨트’에 비해 10일 정도 빠르고 개화기간은 다소 짧은 편이다. 화경당 꽃수나 종자수는 대비품종에 비해 적은 편이었다. 잿빛 곰팡이병에 대한 저항성은 약한 편이며 저온에 대한 내성은 비교적 강하다. 3년간 생체수량을 검토한 결과 ‘그린벨트’에 비해 3회 예취 평균수량이 6% 증수되었다.
Photosynthetically active radiation (PAR; wavelength 400 ~ 700 nm) is the spectral range of solar radiation used by plants for photosynthesis. PAR data are used in various fields of research, such as that focusing on surface vegetation growth, the light energy-chemical energy conversion process, and the terrestrial carbon cycle. In this study, we analyze the variability between Global Horizontal Irradiance (GHI) and PAR according to the solar zenith angle, the clearness index, using GHI and PAR observations from 2016 to 2020 at Anmyeondo Flux Tower of Korea Forest Research Institute (KFRI). We confirm that the PAR decreases and the variability of the ratio of PAR to GHI increases as the atmospheric optical path increases. We also confirmed that the PAR increased and the ratio of PAR and GHI decreased as the clearness index increased. Using the results of these relationships and prior studies, we develop and evaluate empirical models that estimate PAR from GHI. The R² representing the estimation accuracy of the model was 0.988 to 0.996, indicating very high accuracy. With these results, the observation data from the KFRI’s Wando, Pyeongchang, and Samcheok Flux Towers during the same period showed that R² was very high at 0.977 ~ 0.988, confirming its transferability in other regions. Despite the high R², the Mean Bias Error (MBE) for each site was shown to be different. To solve this problem, a model with relative humidity and temperature was developed to apply regional conditions for each site, and showed similar R² to prior models with less MBE. It is expected that the results of this study will be used as policy references such as attracting solar power complexes by drawing up a seasonal map of the Korean peninsula of PAR with solar radiation data observed at the Korea Meteorological Administration"s Automated Synoptic Observing System (ASOS).
Photosynthetically active radiation (PAR; wavelength 400–700 nm) is the spectral range of solar radiation used by plants for photosynthesis. It is necessary to use PAR data in various fields, such as the surface vegetation growth, light energy–chemical energy conversion process, and terrestrial carbon cycle. In this study, a direct normal irradiance (DNI) spectroradiometer installed at the Korea Institute of Energy Research was used to observe direct insolation over the whole wavelength ranges including PAR. The variabilities in solar radiation and wavelength sensitivity according to the solar zenith angle and the clearness index (an indicator of atmospheric turbidity), were analyzed using data collected during June–October, 2020. As the optical path increased, PAR DNI—having a short wavelength—showed greater attenuation than the near-infrared radiation (NIR). Additionally, an increase in the clearness index under the same optical path increased the PAR DNI relatively more. These results mean that the attenuation effect of atmospheric constituents under optical path can be different depending on the wavelength range. Based on the empirical model presented in previous studies and the observation data in Daejeon, the PAR DNI estimation model using DNI in the entire wavelength range were developed and evaluated. Although it was a short analysis period, each model showed an R² of 90% or more, and the model with the clearness index, an indicator of atmospheric conditions, presented higher estimation accuracy. We expect that further data collection will enhance the accuracy of the model despite seasonal variability. Thus, this research will encourage broader applications of the model in other regions.
To extend the shelf-life of kidney bean (Phaseolus vulgaris L.) after harvest, we investigated the effect of packaging material and storage temperature. In case of film package, there was no weight loss during storage, but in paper-box package, remarkable weight loss occurred as storage period extended and storage temperature risen. Firmness of kidney bean was greater in low temperature than ambient temperature storage. Content of vitamin C was decreased rapidly during storage, and in paper package, low temperature storage group had lower decrease of vitamin C than that of room temperature. Total chlorophyll content was not difference among storage temperatures in film package treatments. However, in paper-box package, decrease of chlorophyll in room temperature storage was greater than that of low temperature (8 ~ 10oC). In terms of freshness of kidney bean, we suggest that shelf-life by low temperature storage (8 ~ 10oC) after PP film or paper package was 8 days, but that by room temperature storage after paper package was 4 days. 꼬투리째 먹는 채소인 풋꼬투리 강낭콩의 수확후 포장 및 저장 유통온도별 품질보존 및 상품성에 미치는 영향을 조사하였다. 저장중 중량의 변화에서 PP필름 포장시는 변화가 없었으나 골판지박스 포장시는 저장온도가 높고, 저장기간이 길어질수록 중량 감소율이 현저하였다. 저장중 경도는 저온저장이 상온저장보다 높게 유지되었다. 비타민 C함량은 저장중 모든 처리에서 감소되었고, 그 감소의 폭은 상온저장보다는 저온저장시 적었다. 엽록소함량은 비닐필름 포장시는 저장온도간에 차이가 없었으나, 박스포장시는 상온저장시 엽록소함량의 감소가 저온저장보다 컸다. 외관 상품성을 표시하는 신선도는 비닐포장이나 골판지박스에 속비닐 넣은 후 산물을 포장하여 8 ~ 10oC정도에서 저장 유통시는 상품유지기간이 8일 정도로 상온보관 대비 4일정도 연장되었다.
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These studies were carried out to develop native Calanthein Korea.Calanthenative tosouthern islands in Korea has beautiful flowers with various color and sweet fragrance, andit has been reported to have very good ornamental value. According to the morphologicalcharacteristics of leaves and flower color, 57 horticultural lines of Calanthecollected innatural crossing group were investigated. And the selected orchid was given a name ofhorticultural cultivar to ‘Narai’. In its color of flower, sepal was deep purplish red, petalwas yellow and lip was white. And also, ‘Narai’had strong fragrance and shape ofblooming was flat-blooming type.