• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.7 no.4
• /
• pp.215-220
• /
• 1974

The sand-eel, Ammedytes Personatus is a commercially important fish abounantly found in west and east coast of Korea. Samples were collected from the Baegryeong Island (Yellow Sea), Geoje Island(southern coast) and Jumunjin (East Sea) from May 1973 to December 1974. In this paper the author dealt with some biological point of the fish, especially the relationship between total length ang body weight, and the major spawning season and sex ratio. 1. The major spawning season was confined to the end of November and the end of December at Jumunjin. 2. The sex ratio (male/female) is 0.75 before the main spawning season and increases up to 1.36 after spawning at Jumunjin in 1974. 3. The relationship between the total length (L) and body weight (In were represented as follows: $W=0.0001906L^{3.1998319}$ for the sample from Baegryeong Is. $W=0.0003419L^{3.0213438}$ for the sample from Geoje Is. $W=0.0002655L^{3.1408629}$ for the sample from Jumunjin.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.20 no.4
• /
• pp.354-362
• /
• 1991

To investigate nutritional and biochemical values of buckwheat, amino acids and minerals in buckwheat harvested from Kangweon-do were analysed. Mixed flour between buckwheat and wheat were made to be used for buckwheat noodle and were also analysed minerals and major nutrients in composite flours. When three different levels of flour mix were compared, major nutrients were about same among those mixes but minerals were higher by adding more buckwheat flour, especially by adding more imported buckwheat flour. From this mixed flour, 9 minerals and 16 amino acids including 9 essential amino acids were analysed. Contents of selenium, sodium and magnessium were very high in buckwheat flour, Therefore, nutritional value of domestic buckwheat was highly evaluated. BAP method was used to determine the change of gelatinization in the noodles prepared by extruder at 8$0^{\circ}C$, and in the noodles during freeze drying and refrigeration. 70% of gelatinization was done during noolding process and retrogradation was severe during refrigeration.

• Journal of Forest and Environmental Science
• /
• v.10 no.1
• /
• pp.38-48
• /
• 1994

This study was carried out to estimate drying schedule of Fagaceae four species grown in Kangwon-Do by oven-drying at $100^{\circ}C$ which aimed to elucidate the characteristics such as current moisture content, drying process, initial check, collapse and internal check during drying. The results were summerized as follows ; Current moisture content of each board showed a rapid drying curve with the hight initial moisture content of board and species with the high initial moisture content took long to do drying. Appearance of checks for Quercus variabilis were extremely severe and estimated schedule was $T_5-C_2$. The shrinkage rate of grain direction was in the order of tangential direction > radial direction > longitudial direction and the shrinkage rate of oven-drying at $100^{\circ}C$ was bigger than normal shrinkage rate.

• Journal of Korean Society of Forest Science
• /
• v.71 no.1
• /
• pp.74-81
• /
• 1985

Dimension analysis was used to estimate biomass and net primary production(NPP) in a 36-year-old Japanese red pine (Pines densiflora S. et Z.) natural forest in Kangwondo. Best estimation was made by the equation model of $Wt=aD^bH^c$ where Wt is weight in kg, D is DBH in cm, and H is total tree height in m. Total aboveground biomass was estimated at 198.82 t/ha. Organic matter was distributed in the Japanese red pine stand as follows ; bolewood 68.8%, live branches 16.5%, bolebark 5.4%, foliage 4.6%, dead branches 3.7%, and cones 0.6%. Net primary production was estimated at 15.87 t/㏊/yr and was distributed: bolewood 44.5%, live branches 30.9%, foliage 14.1%, current twig 7.1%, and bolebark 3.3%. Leaf efficiency was estimated at 1.876. The power equation for biomass and IVPP yielded similar results as the results for Pines densiflora in Japan.

• Animal Systematics, Evolution and Diversity
• /
• v.16 no.2
• /
• pp.169-176
• /
• 2000

As one of researches to clarify the taxonomic status of roe deer from Jeju island (C. pygargus tianschanicus), we analyzed partial sequences of mtDNA cytochrome b gene from six roe deers at Jeju island in Korea. Maximum nucleotide Tamura & Nei's distance among three haplotypes was 0.005, and this distance was comparable to the diversity within other roe deer subspecies: it is suggested that roe deers from the mainland dispersed rarely to Jejudo Island, although further analyses are ne-cessary to decide whether or not it was occurred by human introduction. Furthermore, nucleotide distance between cytochrome b sequences of roe deers from Jeju (C. pygargus tianschanicus) and the sequence of roe deer from west Siberia(C. p. pygargus), obtained from GenBank, was average 0.013, and it is suggested that C. p. tianschanicus diverged from C. p. pygargus of west Siberia 0.65 Myr ago.

• Korean Journal of Breeding Science
• /
• v.40 no.4
• /
• pp.377-386
• /
• 2008

The growth performance of Eastern white pine (Pinus storbus L.) was studied with six provenances in four plantations. All growth performances were significantly different among provenances and plantations. The most outstanding source in volume growth at age 39 is North Carolina in all plantations and this trends had been started from four years old seedlings. In plantations, the growth is best in ChunCheon plantation while that is worst in GunPo plantation. The Effect of plantations was thought to be larger than that of provenances growth of P. strobus. A pattern of growth by ages was different by among plantations and even ate age about 40, the growth was still vigorous. Annual precipitation, foggy days, altitude and sand contents in soil are positively correlated with growth and the correlations between by ages were very high.

• Korean Journal of Medicinal Crop Science
• /
• v.27 no.3
• /
• pp.194-201
• /
• 2019

Background: The Ministry of Environment, Korea recognizes Cotoneaster wilsonii Nakai as a second-class endangered plant. It is a native species that grows in Ulleung-do, Korea. To our knowledge, the bioactivity of this plant has not yet been reported. Therefore, in this study, we have reported the bioactivity of C. wilsonii Nakai. Methods and Results: The anti-oxidant activities of C. wilsonii methanolic extract were investigated in vitro. The anti-oxidant activity was evaluated using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical assay, and the total phenolic and flavonoid content were measured. The leaf methanolic extract had the highest DPPH radical scavenging activity ($IC_{50}$; $15.74{\mu}g/m{\ell}$), and it also had the highest total phenolic and flavonoid content ($220.95mg{\cdot}GAE/g$, and $36.46mg{\cdot}QE/g$ extract respectively). Through high performance liquid chromatography (HPLC) analysis, chlorogenic acid was found to be the predominant among all phenolic compounds, showing a concentration of 84.24 mg/g extract. More than 60% decrease in nitric oxide (NO) production was found in the leaf methanolic extract. Conclusions: To the best of our knowldege, this is the first report of the bioactivities of C. wilsonii. The results demonstrate that the leaf methanolic extract of C. wilsonii shows potent anti-oxidant, and anti-inflammatory activities.

• KOREAN POULTRY JOURNAL
• /
• v.38 no.11 s.445
• /
• pp.100-103
• /
• 2006

매년 초 정부에서는 뉴스를 통해 물가에 대한 문제를 다루지 않는 경우가 거의 없다. 가정에서도‘올해는 물가가 얼마나 올랐지?’하고 생각해 보면 물가가 빠르게 상승한다는 것을 체감하게 된다. IMF시절 고금리와 환율상승으로 수입원자재 가격이 상승하면서 많은 국내업계들이 도산을 하는 아픔을 겪었다. 그리고 그여파는 고스란히 생활경제로 돌아와 국민에게 전가되면서 각종 요금들이 줄줄이 인상되었다. 식품류 가격 또한 시대의 흐름과 함께 해 마다 상승해 왔으며 앞으로도 그러할 것이다. IMF이후 환율 급등으로 수입자재의 가격이 높아지면서 어린이들이 좋아하는 아이스크림의 경우는 300원에서 500원으로 큰 폭 상승하기도 하였다. 우리나라 물가는 경제성장에 발맞추어 매년 증가세를 보이고 있으며, 이에 우리 양계산업에도 자연히 영향을 받아 높은 가격상승은 없었지만 거의 지속적으로 가격상승이 이루어졌다. 다만 일순간 질병으로 인해 소폭의 하락세를 보인적은 있지만 대체적으로 꾸준한 가격상승이 있어왔음을 볼 수 있다.

• Korean System Dynamics Review
• /
• v.13 no.1
• /
• pp.63-80
• /
• 2012

This paper is aiming at providing the systems thinking perspective on the collapse of the savings and loan banking system in Korea. Two causal loop diagrams are developed to conduct the analysis: The first is focusing on the structural problems included in the establishment of S&L banking in 1990s. The later is developed based on the project financing mechanism by controlling the credit standard required during the due diligence. The result of this study shows that the main cause of the collapse of the S&L banking is the structural problem connected to real estate market including the failure of regulation.

• Bulletin of the Korea Photovoltaic Society
• /
• v.2 no.1
• /
• pp.41-47
• /
• 2016

세계 태양광 시장은 실리콘 태양전지를 중심으로 기술경쟁에서 가격 경쟁의 시대로 변화되면서 중국의 저가화 공세에 의해 많은 기업들이 수익성 악화로 인해 도산하거나 위기에 처하게 되었다. 이러한 위기를 극복하기 위해 세계 각국에서는 다양한 타입의 태양전지를 개발하여 사업화를 시도하고 있다. 이러한 시도 중 하나가 투명 태양전지이다. 기존의 태양전지 패널을 설치하기 위해서는 추가적인 공간이 필요하고 건물 위에 설치했을 경우 채광과 외관이 좋지 않은 단점을 가지고 있다. 이러한 문제점을 해결하기 위해 건물의 유리창을 태양전지로 활용하는 방안이 도입되고 있다. 만약 유리창을 대신하는 투명 태양전지가 상용화 된다면 추가적인 공간이 필요하지 않고 건물의 채광이나 외관을 해치지 않아 건물의 에너지 비용을 절감하고 활용도가 높아질 것이다. 본 논문에서는 투명 태양전지의 개발 동향 및 방향에 대하여 논하고자 한다.