• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 총회 및 춘계학술발표회
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• pp.287-291
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• 2003

To delineate the internal structures of alluvial aquifer, high resolution seismic and GPR methods were adopted in Buyeo Gunsu-Ri area. The result of seismic refraction survey shows the water table of the aquifer and the result of seismic reflection reveals the basement and somewhat dominant internal structures of alluvial aquifer. The internal heterogeneity due to variations in channel behavior can be delineated using GPR survey. GPR profiles for the point bar deposits near Buyeo county reveals two different stratigraphic units the lower inclined heterogeneous strata and the upper horizontally stratified strata. According to the increase of demand for water resource using artificial recharge in alluvium, it is believed that the information acquired by high resolution geophysical methods will have an important roles for the effective and sustainable development and usage of groundwater in alluvial aquifer.

• Mycobiology
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• 제47권4호
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• pp.449-456
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• 2019

Invasive fungal infections caused by Cyberlindnera fabianii have recently increased. However, biochemical kits such as API 20 C AUX and Vitek-2C have misidentified this species as other Candida spp. such as C. pelliculosa or C. utilis due to no information of Cy. fabianii in yeast database. During our 2016-2017 surveys, eleven isolates of Cy. fabianii were obtained in International St. Mary's Hospital in Korea. Here, we describe its morphological and molecular characteristics and tested its antifungal susceptibility against nine antifungal agents. The sequences of the ITS region and the D1/D2 region of LSU revealed 100% identity with the sequences of Cy. fabianii. In comparison with the results from MALDI-TOF mass spectrometry, we found that Cy. fabianii can be distinguished from other species. In antifungal susceptibility test, voriconazole and echinocandins exhibited good antifungal activities against the majority of Cy. fabianii isolates despite the absence of standard criteria.

• Parasites, Hosts and Diseases
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• 제53권3호
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• pp.299-305
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• 2015

Tapeworms of the genus Spirometra are pseudophyllidean cestodes endemic in Korea. At present, it is unclear which Spirometra species are responsible for causing human infections, and little information is available on the epidemiological profiles of Spirometra species infecting humans in Korea. Between 1979 and 2009, a total of 50 spargana from human patients and 2 adult specimens obtained from experimentally infected carnivorous animals were analyzed according to genetic and taxonomic criteria and classified as Spirometra erinaceieuropaei or Spirometra decipiens depending on the morphology. Morphologically, S. erinaceieuropaei and S. decipiens are different in that the spirally coiled uterus in S. erinaceieuropaei has 5-7 complete coils, while in S. decipiens it has only 4.5 coils. In addition, there is a 9.3% (146/1,566) sequence different between S. erinaceieuropaei and S. decipiens in the cox1 gene. Partial cox1 sequences (390 bp) from 35 Korean isolates showed 99.4% (388/390) similarity with the reference sequence of S. erinaceieuropaei from Korea (G1724; GenBank KJ599680) and an additional 15 Korean isolates revealed 99.2% (387/390) similarity with the reference sequences of S. decipiens from Korea (G1657; GenBank KJ599679). Based on morphologic and molecular databases, the estimated population ratio of S. erinaceieuropaei to S. decipiens was 35: 15. Our results indicate that both S. erinaceieuropaei and S. decipiens found in Korea infect humans, with S. erinaceieuropaei being 2 times more prevalent than S. decipiens. This study is the first to report human sparganosis caused by S. decipiens in humans in Korea.

• 한국태양에너지학회 논문집
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• 제36권1호
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• pp.63-73
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• 2016

How effectively a wind farm captures high market prices can greatly influence a wind farm's viability. This research identifies and creates an understanding of the effects that result in various capture prices (average revenue earned per unit of generation) that can be seen among different wind farms, in the current and future competitive SMP (System Marginal Price) market in South Korea. Through the use of a neural network to simulate changes in SMP caused by increased renewables, based on the Korea Institute of Energy Research's extensive wind resource database for South Korea, the variances in current and future capture prices are modelled and analyzed for both onshore and offshore wind power generation. Simulation results shows a spread in capture price of 5.5% for the year 2035 that depends on both a locations wind characteristics and the generations' correlation with other wind power generation. Wind characteristics include the generations' correlation with SMP price, diurnal profile shape, and capacity factor. The wind revenue cannibalization effect reduces the capture price obtained by wind power generation that is located close to a substantial amount of other wind power generation. In onshore locations wind characteristics can differ significantly/ Hence it is recommended that possible wind development sites have suitable diurnal profiles that effectively capture high SMP prices. Also, as increasing wind power capacity becomes installed in South Korea, it is recommended that wind power generation be located in regions far from the expected wind power generation 'hotspots' in the future. Hence, a suitable site along the east mountain ridges of South Korea is predicted to be extremely effective in attaining high SMP capture prices. Attention to these factors will increase the revenues obtained by wind power generation in a competitive electricity market.

• 지구물리와물리탐사
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• 제8권3호
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• pp.201-206
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• 2005

한국 남동해역에서 취득한 고해상 탄성파 탐사자료의 해석에 의하면 연구해역에 분포하는 해저퇴적층은 후 제4기 동안 형성된 7 개의 퇴적단위로 구성된다. 이들 퇴적단위들은 저해수면계열, 해침계열, 그리고 고해수면계열을 구성한다. 저해수면 계열은 저해수면 쐐기 퇴적단위(SU1) 와 슬럼프 및 슬라이드를 포함하는 질량류 퇴적단위(SU2)로 구성된다. 해침계열은 고해빈/연안 퇴적단위(SU3), 수로충진 퇴적단위(SU4), 해침 사질 퇴적단위(SU5), 해침사퇴 퇴적단위(SU6)등 4 개의 퇴적단위를 포함한다. 고해수면계열은 내대륙붕 니질 퇴적단위(SU7)로 구성 되며, 해수면이 현 수준에 도달한 지난 6000년 이후동안 낙동강과 섬진강에서 공급된 퇴적물로 구성된다.

• Asian-Australasian Journal of Animal Sciences
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• 제25권7호
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• pp.1003-1008
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• 2012

One hundred and twenty weanling pigs in experiment 1 (Exp. 1) ($6.91{\pm}0.99kg$; 21 d of age) and Exp. 2 ($10.20{\pm}1.09kg$; 28 d of age) were used in two 42-d and 35-d experiments to evaluate the effect of medium-chain-triglyceride (MCT) on growth performance, apparent total tract digestibility (ATTD) of nutrients and blood profile. In both of Exp. 1 and Exp. 2, the same dietary treatments were utilized as follows : i) negative control (NC), ii) positive control (PC), NC+antibiotics (40 mg/kg Tiamulin, 110 mg/kg Tylosin, and 10 mg/kg Enramycin, iii) MCT3, NC+0.32% (phase 1, 2 and 3) MCT, and iv) MCT5, NC+0.55% (phase 1), 0.32% (phase 2 and 3) MCT. In Exp. 1, the pigs fed MCT5 diets had higher (p<0.05) ADG compared to NC treatment during the first 2 wk. From d 15 to 28, the ATTD of energy was improved (p<0.05) by MCT3 compared to the PC treatment. No effect has been observed on the blood profiles [red blood cell (RBC), white blood cell (WBC), immunoglobulin-G (IgG), lymphocyte concentration] measured in this study. In Exp. 2, the ADG were increased (p<0.05) by the MCT5 treatment than the PC treatment from d 0 to 14. Pigs fed PC treatment diet had lower ADFI (p<0.05) and better FCR (p<0.05) than NC treatment, whereas no differences were shown between MCT treatments and NC or PC treatment from d 15 to 35 and overall phase. The ATTD of DM and nitrogen were improved (p<0.05) by the effect of MCT5 related to the NC and PC treatment at the end of 2nd and 5th wk. The pigs fed MCT3 had higher (p<0.05) energy digestibility than PC treatment. No effects were seen in the blood profiles we measured (WBC, RBC, lymphocyte and immunoglobulin-G). In conclusion, the addition of MCT in the weanling pigs diet can improve the ADG and digestibility during the earlier period (first 2 wks), but had little effect on the blood characteristics.

• 정보관리학회지
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• 제36권3호
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• pp.109-129
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• 2019

대학의 재정 악화는 대학도서관 예산 삭감으로 이어지고, 특히 자료구입비 예산에 큰 영향을 끼쳤다. 이에 대한 해결책으로 대학도서관 자원공유에 관한 논의가 이루어지고 있으며, 상호대차 데이터를 분석하는 연구들이 진행되었다. 본 연구는 이러한 연구 흐름과 같이 국내 4년제 대학도서관 상호대차 장서 프로파일을 규명하고자 하였다. 이를 위해 2011년부터 2017년까지 KERIS 종합목록의 서지와 상호대차 데이터를 활용하여 상호대차 현황을 분석하였다. 그 결과로 첫째, 2011년에는 대규모 대학도서관을 중심으로 서양서 상호대차의 제공이 이루어졌으나, 2014년 이후 점차적으로 고유장서의 비율이 증가하면서 상호대차 네트워크 내 주요 권역의 범위가 확대되고, 권역 내 영향력이 증가하는 기관이 다수 출현하였다. 둘째, 2012년에는 서양서 소장 종수가 많고, 공통장서의 비율이 높을수록 상호대차 네트워크 내 영향력이 크게 나타났으나, 2016년에는 이러한 경향과 더불어 고유장서의 비중이 높을수록 제공 측면에서 영향력이 증가하였다. 셋째, 서양서 소장과 상호대차 지수에 의한 계층적 군집 분석에 따른 6개 군집의 대학도서관이 규명되었다. 이러한 연구결과는 향후 대학도서관 자원공유를 위한 정책 수립에 있어서 활용할 수 있으리라 기대한다.

• 미생물학회지
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• 제45권2호
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• pp.170-176
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• 2009

제주도에 서식하는 2종의 해양 해면, Dictyonella sp.와 Spirastrella abata의 공생세균 군집구조를 16S rDNA-DGGE(denaturing gradient gel electrophoresis) 방법에 의해 분석하였다. 해면으로부터 total genomic DNA를 추출하여 GC clamp가 추가된 세균에 특이적인 341f primer와 518r primer를 이용하여 16S rRNA gene의 V3 부위를 증폭한 후 DGGE 전기 영동하고 재증폭하여 염기서열을 분석하였다. 그 결과 Dictyonella sp.에서 8개, Spirastrella abata에서 7개의 band를 확인할 수 있었다. 공통된 주요 band가 없는 패턴을 나타내었으며, DGGE band로부터 DNA를 추출하여 부분 염기서열을 분석한 결과, NCBI에 등록된 서열들과 93%~98%의 유사도를 나타내었다. Dictyonella sp.의 주요 해면 공생세균은 uncultured Gammaproteobacteria, Spirastrella abata의 경우 uncultured Alphaproteobacteria, Firmicutes에 각각 포함되어 해면 종에 따른 숙주 특이적 분포를 보이는 것으로 나타났다.

• Safety and Health at Work
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• 제9권2호
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• pp.133-139
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• 2018

Background: Selecting priority occupational carcinogens is important for cancer prevention efforts; however, standardized selection methods are not available. The objective of this paper was to describe the methods used by CAREX Canada in 2015 to establish priorities for preventing occupational cancer, with a focus on exposure estimation and descriptive profiles. Methods: Four criteria were used in an expert assessment process to guide carcinogen prioritization: (1) the likelihood of presence and/or use in Canadian workplaces; (2) toxicity of the substance (strength of evidence for carcinogenicity and other health effects); (3) feasibility of producing a carcinogen profile and/or an occupational estimate; and (4) special interest from the public/scientific community. Carcinogens were ranked as high, medium or low priority based on specific conditions regarding these criteria, and stakeholder input was incorporated. Priorities were set separately for the creation of new carcinogen profiles and for new occupational exposure estimates. Results: Overall, 246 agents were reviewed for inclusion in the occupational priorities list. For carcinogen profile generation, 103 were prioritized (11 high, 33 medium, and 59 low priority), and 36 carcinogens were deemed priorities for occupational exposure estimation (13 high, 17 medium, and 6 low priority). Conclusion: Prioritizing and ranking occupational carcinogens is required for a variety of purposes, including research, resource allocation at different jurisdictional levels, calculations of occupational cancer burden, and planning of CAREX-type projects in different countries. This paper outlines how this process was achieved in Canada; this may provide a model for other countries and jurisdictions as a part of occupational cancer prevention efforts.

• 농업과학연구
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• 제46권2호
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• pp.285-292
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• 2019

This study was done to evaluate the effects of a mixture of essential oils and organic acid supplementation on growth performance, blood profiles, leg bone length and intestinal morphology in Ross broilers. A total of 40 Ross 308 broilers ($1140{\pm}80g$) were randomly allocated to 2 groups, a basal diet (CON) and a basal diet + 0.05% $Avi-protect^{(R)}$ (AVI, Mixture of 25% citric, 16.7 sorbic, 1.7% thymol, and 1.0% vanillin), with 20 replicates for every group and 1 chicken per replicate per cage. The broilers were raised in a temperature-controlled room maintained at $24{\pm}1^{\circ}C$ and $50{\pm}5%$ humidity. The body weight (p < 0.05) and weight gain (p < 0.05) of the broilers were increased in the AVI group compared with the CON group. The triglyceride (p < 0.05) and low density lipoprotein (LDL) (p < 0.05) contents were significantly decreased in the AVI group compared with the CON group. There was no significant difference in the leg bone length between the AVI and CON groups (p > 0.05). The villi height (p < 0.05) and goblet cell count (p < 0.05) were significantly increased in the AVI group compared with the CON group. In conclusion, $Avi-protect^{(R)}$ as a feed additive improved the growth performance and lipid metabolism and promoted the development of the intestinal morphology of broilers.