We classified wind sectors according to the wind features in South Korea. In order to get the information of wind speed and wind direction, we used and improved on the atmospheric numerical model. We made use of detailed topographical data such as terrain height data of an interval of 3 seconds and landuse data produced at ministry of environment, Republic of Korea. The result of simulated wind field was improved. We carried out the cluster analysis to classify the wind sectors using the K-means clustering. South Korea was classified as 8 wind sectors to the annual wind field.

In order to make sure the impact of spatial resolution of wind energy map on the estimation of wind power density in the Korean Peninsula, the comparison studies on the characteristics of wind energy map with three different spatial resolutions were carried out. Numerical model used in the establishment of wind map is MM5 (5th generation Mesoscale Model) with RDAPS (Regional Data Assimilation and Prediction System) as initial and boundary data. Analyzed Period are four months (March, August, October, and December), which are representative of four seasons. Since high spatial resolution of wind map make the undulation of topography be clear, wind pattern in high resolution wind map is correspond well with topography pattern and maximum value of wind speed is also increase. Indication of island and mountains in wind energy map depends on the its spatial resolution, so wind patterns in Heuksan island and Jiri mountains are clearly different in high and low resolutions. And area averaged power density can be changed by estimation method of wind speed for unit area in the numerical model and by treatment of air density. Therefore the studiable resolution for the topography should be evaluated and set before the estimation of wind resources in the Korean Peninsula.

This study has analyzed the scale, location, resource potential and feasibility of offshore wind farm scientifically and systematically based on the national wind map and GIS. For long-term wind power development, this study pursues siting strategy building, selection of target area and deciding development priority as well as the presenting a basis for assessment that are necessary for policy decision making by making theme layers under GIS environment. According to the analysis after organizing technological development by stages, even if only the most suitable sites are developed among the area of offshore wind farm candidates that can be developed under the current technological standard, it has been evaluated as being able to develop about 3 times of the wind power dissemination target until 2012. It is expected that about 5% of territorial water area can be developed in a short-term future while the southern offshore area possessing relatively favorable wind resource than the western offshore has been identified as the most feasible site. While about 23% of territorial water area has been classified as potential area for offshore wind farm development in a long-term future, even Jeju Island and offshore of Ulsan possessing excellent wind resource have been analyzed as feasible sites. The feasibility assessment of offshore wind farm development established by this study is expected to assist national strategy building for accomplishing the wind power dissemination target.

The physical properties of an atmospheric boundary layer in Wolryong, a west coastal region of Jeju, South Korea, in terms of the atmospheric stability and roughness length, is important and relevant to both engineers and scientists. The study is aiming to understand the atmospheric stability around this region and its effect on the roughness length. We calculate the Monin-Obukhov length(L) against 3 typical regions of the atmospheric condition - unstable regime (-5<H/L<-0.2), neutral regime (-0.2≤H/L≤0.2) and stable regime (0.2<H/L<2), where H is the measurement height. The diurnal Monin-Obukhov length substantially varies in the night, but most of the H/L comes under the neutral regime. The roughness length scale can be derived by three different methods - logarithmic profile, standard deviation and gust factor method. The finding in the study is that the methods of the standard deviation and the gust factor, apart from the logarithmic profile, are all similar in terms of the roughness length under the different atmospheric conditions. In addition, they have sufficiently shown the effect of obstacles and surface conditions around the measurement site.

As a part of effort to establish an offshore wind resource assessment system of the Korean Peninsula, a numeric wind simulation using mesoscale climate model MM5 and a spatial distribution of offshore wind extracted from SAR remote-sensing satellite image is compared and analyzed. According to the analyzed results, the numeric wind simulation is found to have wind speed over predication tendency at the coastal sea area. Therefore, it is determined that a high-resolution wind simulation is required for complicated coastal landforms. The two methods are verified as useful ways to identify the spatial distribution of offshore wind by mutual complementation and if the meteor-statistical comparative analysis is performed in the future using adequate number of satellite images, it is expected to derive a general methodology enabling systematic validation and correction of the numeric wind simulation.

The effect of gamma irradiation on the storage stability of Undaria pinnatifida was investigated. A three-log reduction in total aerobic bacteria in U. pinnatifida samples was obtained by irradiation with 3 kGy. During storage for 2 weeks, the viable counts of microorganisms in non-irradiated U. pinnatifida increased to 6 log CFU/g. However, irradiation of U. pinnatifida by 5 kGy eliminated microorganisms. The Hunter of U. pinnatifida was slightly increased after 5 kGy of irradiation. The hardness properties of U. pinnatifida decreased during storage, but were not changed by irradiation with up to 3 kGy. These results indicate that low-dose irradiation (3 kGy) could be effective for improvement of the storage stability of U. pinnatifida.

본 연구는 찔레 에탄올 추출물의 세포 활성 및 티로시나아제활성 저해를 분석하였다. 찔레 추출물의 세포활성을 분석한 결과 찔레 잎과 뿌리 추출물의 경우에는 추출물을 처리하지 않은 대조군과 유사한 결과를 관찰하였다. 모든 농도에서 세포 활성이 나타나지 않아 티로시나아제 활성 저해 효과를 분석한 결과 찔레 잎과 뿌리추출물은 상대적으로 고농도(200 μg/ml)에서 약 30~32% 정도를 저해하는 효과를 나타냈다. 또한 B16 세포에서 티로시나아제활성 저해 효과를 분석한 결과 상대적으로 고농도(200 μg/ml)에서 양성대조군인 알부틴보다 20~25% 정도 낮은 저해 효과를 나타냈다. 멜라닌 함량 저해 효과를 분석한 결과 찔레 잎과 뿌리 추출물의 경우 티로시나아제의 저해 효과와 유사하게 농도 의존적인 저해효과를 나타내는 것을 관찰하였다. RT-PCR 방법으로 분석한 결과, 추출물 처리군들은 정상대조군과 비교하여 티로시나아제 mRNA 수준이 유의적으로 차이가 나지 않았으며, 또한 농도 의존적인 변화도 없었다.

In the present study, the anti-cancer activity of 80% ethanol extracts from 120 kinds of medicinal herbs and native plants were investigated. Among them, the barks of Melia azedarach L. var. japonica Makino showed the highest cytotoxicity in HCT-15 human colon cancer cell. With this result, we carried out hollow fiber (HF) assay and anti-metastasis study to confirm the anti-cancer effects of M. azedarach var. japonica. In MTT assay, M. azedarach var. japonica.inhibited the proliferation of HCT-15 cells in dose-dependent manner. HF assay was carried out using A549 human adenocarcinoma cell, HCT-15 and SK-Hep1 human liver cancer cell via intraperitoneal (IP) and subcutaneous (SC) site. As a results, SK-Hep1 implanted in IP site showed the highest cytotoxicity. The result from metastatic model using B16/BL6 mouse corresponded to that of HF assay. These results suggest that the ethanol extract from M. azedarach var. japonica. might have a potent anti-cancer activity and advanced study is needed for the development of novel natural anti-cancer drug.

본 연구는 프리저브드 플라워의 가공기술 개발의 일환으로 탈수를 위한 에탄올의 적정처리시간과 글리세린을 이용한 보존용액의 적정처리 농도 및 처리시간을 구명하여 장미 'Vital'의 프리저브드 플라워 가공 상품기술에 대한 기초자료를 얻고자 실시하였다. 에탄올을 이용한 탈수처리효과는 6∼36시간 처리시 모두 탈수는 가능하여 보존액 처리에는 문제가 없었으나 12시간 이내 탈수처리의 경우는 화색의 탈색이 덜 이루어졌고 24∼36시간처리에서는 화색의 탈색이 완전히 이루어져 경제적인 탈수처리시간은 24시간이 적정시간이라고 본다. 글리세린을 이용한 보존용액의 적정처리 농도와 처리시간에 대한 실험결과 5～10mg・L-1처리에서 최적농도로 나타났다. 보존용액 처리시간은 모두 12시간이 최적시간으로 나타났다. 보존용액처리는 글리세린 10gmL-1에서 화색, 화형, 유연성, 꽃잎말림, 기호도 등의 관능평가에서 총 평점 95점으로 높은 평가를 받았다.

UV-C 조사가 고춧가루의 저장 중 미생물학적 변화와 품질에 미치는 영향을 연구하였다. 고춧가루에 UV-C 조사를 27, 54, 으로 처리한 후 에서 4 주간 저장하였다. UV-C 조사에 의해 고춧가루에 존재하는 오염된 미생물 수의 감소는 호기성 세균과 B. cereus에서 대조구 대비 각각 1.03, 0.90 log CFU/g 감소하였으며, 4주 저장기간 동안 초기 감균 효과를 유지하였다. UV-C 조사된 시료의 Hunter L, a, b 값

뽕잎과 오디를 물, 50% 에탄올, 100% 에탄올 용매를 이용하여 microwave로 추출하여 이의 생리활성을 측정하였다. 뽕잎과 오디의 전자공여작용의 측정결과 모두 용매별 차이를 보였으며, 물과 50% 에탄올 추출물에서 로 높은 활성을 보였다. Tyrosinase는 로 20% 내외의 결과를 보였으며 용매별 차이는 없었다. SOD 유사활성 측정결과 뽕잎과 오디 모두 에탄올 농도가 증가할수록 활성이 감소하는 경향을 보여 물 추출물의 활성이 높게

후박추출물은 중국 원산인 당후박에서 제조되며, 항산화 및 항염증 효과로 알려져 있다. 후박의 성분으로는 폴레페놀인 honokiol 및 magnolol 등이 알려져 있다. 이 연구에서, 우리는 후박추출물이 triglyceride (TG)의 축척을 감소시킴으로써 지방세포 분화를 억제한다는 표면적인 결과를 얻었다. 또한, 후박 추출물이 hormone sensitive lipase (HSL) 단백질 수준을 증가시키고 adipocyte에 specific한 transcription factors로 peroxisome proliferator activated receptor (PPAR)-γ의 단백질과 mRNA 수준을 억제하였다. 결과적으로, 후박추출물이 항비만제로서 adipogenic transcription factor와 그들의 특이적인 유전자의 발현을 억제함으로써 지방세포 분화를 억제한다고 사료된다.