• The Korean Journal of Mycology
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• v.28 no.1
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• pp.32-37
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• 2000

The objectives of this study was to identify genetic variations of Tricholoma matsutake (S. Ito et Imai) Sing. growing in different geographic ranges in South Korea. Mushrooms were collected during fruiting seasons from 1994 to 1997 from 11 major sites which included four sites (Bonghwa, UIjin, Goryoung, and Chungdo) in Kyongbuk Province, three sites (Changnyung, Hadong, and Hamyang) in Kyongnam Province, two sites (Yangyang and Inje) in Kangwon Province, one site (Goisan) in Choongbuk Province, and one site (Namwon) in Chonbuk Province. Two mushrooms each from three to eight shiros in each sites were collected. Genetic characteristics were analyzed by Inter-Simple Sequence Repeat Polymerase Chain Reaction (I-SSR PCR) method using six primers. With a total of 131 DNA bands identified, Nei's genetic distance and UPGMA tree were constructed. It was estimated that genetic variations between sites amounted to 12.9%, while 87.1% of total variation was explained by variations among individuals within sites. The cluster analysis indicated that the eleven major sites were clustered into four groups, group I (Yangyang, Hamyang, Inje, Hadong and UIjin), group II (Changnyung, Namwon and Chungdo), group III (Goryoung), and group IV (Bonghwa and Goisan). It is concluded that matsutake mushrooms in South Korea have a considerable degree of genetic variations between major sites.

• Journal of Korean Society of Environmental Engineers
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• v.35 no.12
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• pp.943-952
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• 2013

Algae blooms have soared recently in the lakes across the nation due to eutrophication. Blue-green algae cause unpleasant scene, produce taste and odor problem, and hinder processes in drinking water treatment. Algae toxicity monitoring has been strengthened, because the damages of wild lives and livestocks by algal toxins have been reported. Investigation on the characteristics of cyanobacterial occurrence and concentration distribution of Cyanotoxins in Hoeya reservoir have been conducted. Physical and chemical influences of water environment on cyanobacterial occurrences have also been studied. Movements of four species of Microcystin and five species of Anatoxin-a among Cyanotoxins were observed by LC-MS/MS analysis. Microcystis spp. among the cyanobacteria have mainly dominated in the Hoeya reservoir during the investigating period. The density of cyanobacteria were positively correlated with temperature and pH of water. Highest concentrations of Microcystin-LR and Microcystin-RR were $0.424{\mu}g/L$ and $0.117{\mu}g/L$ at the sampling points. Total concentration of Cyanotoxins in water coming into the water treatment plant was $0.182{\mu}g/L$, and they were not detected in treated water.

• Journal of Korea Technology Innovation Society
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• v.17 no.3
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• pp.540-562
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• 2014

Although the impact of technological partner selection on the success of technological alliance is critical, little attention has been paid to the area of technological alliance partner selection criteria and the relationship between partner selection criteria and success factors of alliance. This study bridges this gap by understanding previous studies of general alliance partner selection criteria such as marketing, international, logistics and production alliances. I drew technological alliance partner selection criteria using AHP method with 12 experts who are currently in charge of technological alliance activities at Korean Venture Companies. This study found 4 criteria such as 'task-related', 'partner-related', 'learning-related', 'risk-related' criteria with 14 items and the relative importance of technological alliance partner selection showed as follows: 'risk-related', 'learning-related', 'partner-related', 'task-related' criteria. In order to test the relationship between technological partner selection criteria and performance, I used 215 survey data of Korean Venture Companies. The results showed that 'partner-related' and 'task-related' criteria had strong positive impacts on the success of technological alliance. Further, I put 4 moderating variables into the study model in order to see their moderating effects. However, no moderating variable showed significant effects. In conclusion section, I discussed the findings and implications of this study and directions for future studies.

• Journal of The Korean Society of Grassland and Forage Science
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• v.33 no.1
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• pp.30-38
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• 2013

This study was carried out to investigate the growth characteristics, yield, chemical compositions and nutritive yield of whole crop barley varieties harvested in a paddy field. The experimental design was arranged in a randomized block design with three replications. The treatments consisted of five whole crop barley varieties (Yuyeon, Youngyang, Wooho, Dami, Soman). The planting date was on 21 October 2009 and the samples were harvested on 21 May 2010. Dry matter yield was higher in Youngyang and Dami than other varieties (p<0.05). Crude protein, crude fat, crude ash, ADF and TDN were not significantly different. Crude fiber was the highest at Dami (31.4%), and Youngyang (31.4%) exhibited the lowest crude fiber compared to other varieties (p<0.05). NDF was higher in the order of Wooho > Dami > Soman > Yuyeon > Youngyang (p<0.05). Total mineral content was higher in the order of Youngyang > Wooho > Dami > Soman > Yuyeon (p<0.05). The contents of both essential and non-essential amino acids were not different among whole crop barley varieties. Yields of crude protein was the highest in Wooho (p<0.05), and yields of mineral, amino acid, free sugar and TDN were the highest in Youngyang. Based on the results from this study, it can be suggested that Youngyang and Wooho showed to have higher productivity and high nutritive values compared to other varieties.

• Journal of Korea Port Economic Association
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• v.27 no.2
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• pp.355-372
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• 2011

Various incentive policies for transshipment cargo have been enforced without any evaluation of the effectiveness. Therefore, the purpose of this study is to evaluate the effect of volume incentive on container transshipment cargo. To be different from previous studies, this study tries to quantitatively assess the incentive effects by using econometric techniques. The result derived from the ARIMA type models indicates that the total amount of the increased transshipment cargo during the last 7 years is about one million TEU. In the meanwhile, the multivariate long run equilibrium model implies that the increased transshipment cargo is less than 0.5 million TEU for the 7 years. Furthermore, the structural break tests indicate that the volume incentive does not change the model structures. It means that the effect of volume incentive is not statistically significant. Consequently, the test results conclude the effect of volume incentive on transshipment cargo is not significant although the volume of transshipment cargo is increased to some extent by volume incentive. Considering the magnitude of BPA's expenditure, we doubt the effectiveness of volume incentive. This study, therefore, encourages the port authority to research a more efficient way to induce transshipment cargo rather than focusing on only volume incentives.

• Journal of Plant Biotechnology
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• v.41 no.1
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• pp.19-25
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• 2014

The total production volume has been sharply increased from year 2008 in Gyeongnam province, South Korea by the policy of preservation and promotion of indigenous balloon flower germ lines. In an attempt to assist the Gyeongnam province's policy, in this study, we tried to establish a technique to differentiate the indigenous balloon flower germ lines with those collected within South Korea and China. Our preliminary results indicated that RAPD analyses with five different primers exhibited high frequency of polymorphic DNA bands up to 76.9% and phylogenetic tree indicated that some of the indigenous lines can be easily differentiated with others. However, it was suggested that more advanced techniques such as single nucleotide polymorphic markers need to be developed in particular, by using extra-chromosomal DNA.

• Journal of the Korean Society of International Agriculture
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• v.30 no.4
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• pp.285-291
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• 2018

The System of Rice Intensification (SRI) has been spread very quickly in southern Cambodia. To understand the motivation of farmers in adapting SRI, and its benefits, we conducted an on-farm study at Popel commune, Tramkak district, Takeo province in southern Cambodia, during the 2012 and 2013 wet season. We noticed a significant difference between SRI and conventional farmers' practices (FP) in rainfed lowland rice ecosystem. Despite of low nitrogen input, without chemical fertilizers, high grain yield was achieved in SRI 1 (6.0 t ha) and SRI2-Bottom ($7.2t\;ha^{-1}$) in 2013. SRI 1 and SRI 2 of panicle and number of panicle were high than SR 3, FP 2, and FP 3 due to early transplant. Relationships between total number of spikelet and plant nitrogen were ($r^2=0.95$) highly positive at harvest. SRI fields were, most of them achieving highly superior yield and number of panicle compared to their FP fields. The results indicated that SRI practices of planting younger seedling, with organic material and topography of paddy, lead to increased grain yield.

• Journal of Nutrition and Health
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• v.56 no.1
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• pp.24-34
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• 2023

Purpose: The prevalence of diabetes mellitus (DM) continues to increase worldwide, and blood glucose control may reduce mortality from diabetic complications and healthcare costs. Mulberry twig (MT) has been used as a herbal medicine in Asia, and its antidiabetic efficacy has recently been reported, but research in this area is still limited. This study examined the antidiabetic effects of water extracts of MT in diabetic animals. Methods: Six weeks old male ICR mice were divided randomly into three groups; normal control (NC, n = 10), DM control (DC, n = 10), and MT (n = 10). Streptozotocin (STZ, 50 mg/kg/day) was injected intraperitoneally into mice in the DC and MT groups for 5 consecutive days. After 10 days of the last STZ injection, the mice in the MT group were administered orally with MT water extracts (5 g/kg body weight) for 16 days. Results: The MT water extracts ameliorated the swelling of the liver in the diabetic mice and reduced the elevated levels of fasting blood and plasma glucose, total cholesterol (T-CHO), low density lipoprotein-CHO, and the ratio of high density lipotrotein (HDL)-CHO/T-CHO. The liver triglyceride (TG) and glycogen contents were also significantly lower in the MT group mice than in the DC group. The small intestine disaccharidase activity was analyzed to understand the therapeutic effects and the mechanism of MT water extracts in diabetic animals. MT group mice showed reduced lactase and sucrase activity in the proximal part of the small intestine. On the other hand, body weight, plasma insulin, TG, HDL-CHO, and hepatic T-CHO levels were similar in the DC and MT groups. Conclusion: These results suggest that MT water extracts have antidiabetic effects and can be developed as a functional source to reduce the postprandial blood glucose or to prevent DM incidence.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.85-85
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• 2020

껍질째 먹는 청포도 품종인 '샤인머스켓'은 망고포도라고 불릴 정도로 단맛이 강하고 풍부한 머스켓향을 가지는 것이 특징이다. 또한 포도알이 크고 무핵처리에 의해 씨가 제거되어 소비자 만족도가 높아 최근 각광받고 있는 포도 품종이다. 샤인머스켓에 대한 국내연구는 주로 재배조건에 따른 과실특성 위주로 보고되고 있어, 본 연구는 소비가 늘고 있는 샤인머스켓의 기능성에 대한 기초자료를 제시하고자 부위별 추출조건에 따른 총폴리페놀, 총플라보노이드 함량 및 항산화 활성을 조사하였다. 샤인머스켓은 2019년 11월에 경북 상주지역에서 생산된 것으로, 과피와 과육의 2가지로 나누어 동결건조하였으며, 추출용매(증류수, 에탄올, 메탄올)와 추출용매농도(30%, 50%, 70%, 100%) 조건에 따라 시료 무게대비 10배의 용매를 가한 후 초음파방법으로 2시간 추출하였으며, 이를 2회 반복하였다. 부위별 총폴리페놀과 총플라보노이드 함량은 과육보다 과피에서 유의적으로 높게 나타났으며, 항산화 활성 또한 과피에서 월등히 높은 값을 나타냈다. 추출조건에 따른 생리활성 물질의 함량과 항산화 활성은 과육과 과피에서 다르게 나타났는데, 과육의 경우 메탄올 추출 시 활성이 높게 나타난 반면, 과피는 에탄올 추출 조건에서 활성이 더 높게 나타났다. 과육의 경우, 70% 메탄올 추출 조건에서 가장 높은 활성을 보였으며, 총폴리페놀 0.99 mg CE/g dw, 총플라보노이드 0.31 mg CE/g dw, DPPH 라디칼 소거능 2.94 mM TE/g dw, ABTS 라디칼 소거능 6.82mM TE/g dw, ORAC 11.40 mM TE/g dw, FRAP 4.92 mM Fe(II)/g dw이었다. 이와 달리 과피는 30% 에탄올 추출 조건에서의 활성이 유의적으로 높게 나타났으며, 총폴리페놀 10.23 mg CE/g dw, 총 플라보노이드 5.22 mg CE/g dw, DPPH 라디칼 소거능 44.72 mM TE/g dw, ABTS 라디칼 소거능 123.25 mM TE/g dw, ORAC 208.38 mM TE/g dw, FRAP 96.24 mM Fe(II)/g dw이었다. 이상의 결과를 볼 때, 껍질째 샤인머스켓을 섭취하는 것은 기능성 측면에서 유익하며, 추후 부위를 나누지 않은 샤인머스켓을 대상으로 추출조건 설정 및 기능성 평가에 대한 연구를 진행할 예정이다.

• Journal of Korea Technology Innovation Society
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• v.16 no.4
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• pp.1032-1054
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• 2013

An increase of national R&D has brought the growth of research performance such as paper and patent quantitatively. However, the results of technology transfer and commercialization still leave much to be desired in Korea. Therefore, it has to be drawn up a plan for effective management & application of research performance created by public research institutes. We select four leading institutes (two universities, two government-funded research institutes) that performed efficient performance management & application. Then, we analyze the best practices and suggest contributions. The results show that four institutes build up a framework of performance management & application from research planning to technology transfer and commercialization. At an early planning phase, institutes set up definite needs-oriented goals, and prior review as well as prior art search is executed through experts. Besides, they systematically promote strategic patent management, technology marketing, post management, and so forth. For such a performance management & application process, capabilities have to be supported with regard to specialized organization, system, routine. This study can give an hint to improve performance management & application from public research institutes in Korea.