• 한국환경성돌연변이발암원학회지
• /
• 제25권1호
• /
• pp.32-39
• /
• 2005

In order to identify potential biomarkers of environmental monitoring, we evaluated heat shock genes expressions as effects of various environmental pollutants (nonylphenol, bisphenol-A, 17a­ethynyl estradiol, bis(2-ethylhexyl)phthalate, endosulfan, paraquat dichloride, chloropyriphos, fenitrothion, cadmium chloride, lead nitrate, potassium dichromate, benzo[a]pyrene and carbon tetrachloride) on larvae of aquatic midge Chironomus tentans (Diptera, Chironomidae). Heat shock protein 70 gene expression increased in most of chemicals treated larvae compared to control. The response was rapid and sensitive to low chemical concentrations but not stressor specific. In conjunction with stressor specific biomarkers, heat shock protein 70 gene expression in Chironomus might be developed for assessing exposure to environmental stressors in the fresh water ecosystem. Considering the potential of Chironomus larvae as biomonitoring species, heat shock gene expression has a considerable potential as a sensitive biomarker for environmental monitoring in Chironomus.

• 한국유가공학회:학술대회논문집
• /
• 한국유가공기술과힉회 2008년도 추계학술대회 논문집
• /
• pp.39-50
• /
• 2008

The immune system of mammals includes a complex array of cells and molecules, which interact to provide protection from pathogenic microorganisms. The beneficial role played by lactic acid bacteria and milk-derived peptide in the humans, including the effects on the immune system, has been extensively reported. They are present in dairy products and are frequently used as nutraceuticals to some improve some biological functions in the host. The activation of the systemic and secretory immune response by lactic acid bacteria and milk-derived peptide requires many complex interactions among th different constituents of the intestinal ecosystem. The aim of this review was to make the point about the immunological potential of lactic acid bacteria and milk-derived peptide.

• KDI Journal of Economic Policy
• /
• 제44권4호
• /
• pp.1-24
• /
• 2022

We investigate how reforestation contributed to stabilization of riverine water levels in South Korea. For the purpose, we estimate an equation capturing dynamic relationships among rainfall, upstream-area tree stock, and downstream water levels in three river systems of Hongcheon, Mangyeong, and Hyeongsan, using daily observations of precipitation and water levels for the period from 1985 to 2005. Simulation based on estimation results shows that increase in the tree stock in a river basin leads to a significantly suppressed peaking in riverine water levels in response to an abrupt and concentrated rain in the upstream area. For instance, an hour-long concentration of 100mm rain results in 0.7m rise in water level if the volume of growing stock is 1 million m³, whereas the rise in water level stays below 0.27m with 5 million m³ in the growing-stock volume.

• 한국환경복원기술학회지
• /
• 제19권5호
• /
• pp.47-57
• /
• 2016

In the recent years, the incidence of abandoned concrete roads have been increasing rapidly due to road improvements and facilities route construction, these abandoned expressway and unused roads are scattered throughout the country but the management system is not clear, they does not be an effectively managed because there is no maintenance cost. In response to these social concern and expectation, the Korea Expressway Corporation that is management authority of the expressway is developing policy initiatives and various projects to restore the closed road to ecological for eco-friendly projects of the existing expressway. And as part of these projects, Hwanggan IC unmanaged abandoned concrete roads restoration project was done and it was conducting monitoring for ecological restoration that is not one-off but sustainable. After test construction over seven years at the time, test construction of four ways enforced but the boundaries have become blurred over time. And Pinus koraiensis, Callicarpa dichotoma and Sorbaria stellipilla var. typica planted in the site are dominating, else Amorpha fruticosa and Indigofera pseudotinctoria sowed are dominating. Invasive species is that Robinia pseudoacacia was growing in the colony. Over monitoring result time, the vegetation was taking root and the ecosystem was being restore. But the disturbance of vegetation happens due to planting of tree species that doesn't fit in the restoration area and advent of ecosystem Disturbing Species. The study will be providing a basic data that identify change of plant environment by monitoring of the site and soil environment during June to November 2016 and secure an objective evaluation data by analyzing the effects of ecological restoration for revegetation test bed evaluation for ecological restoration of expressway in ecological restoration construction in later.

• 융합보안논문지
• /
• 제20권3호
• /
• pp.89-97
• /
• 2020

산업기술 보안 이슈는 대내외적으로 급격한 변화를 겪고 있다. 미국 등 선진국은 글로벌 가치사슬 및 해외자본 이동과 갈등을 빚으면서도 자국의 핵심 기술 보호를 위한 대응전략을 수립하고 있으며, 국내 또한 중장기 산업경쟁력 속에서 산업안보이슈를 접근하고 있다. 본 연구에서는 국내 산업보안 관련 이해관계자들을 대상으로 산업보안 생태계 정책인식 조사를 통해 주요 이슈를 도출하였다. 조사결과, 이해관계자 모두 산업보안의 중요성에 대해 인식하나 아직까지 국가전체 보안관리 역량은 낮다고 인식하고 있으며, 국가핵심기술은 국가에서 보다 책임을 지고 관리할 필요성이 있음을 제기하였다. 3라운드에 걸친 종합 델파이 조사를 기반으로 '산업보안 컨트롤타워 중심 시스템 체계화', '보안전문기업 기술력 강화 및 보안인력 양성', '인력 및 자본을 통한 기술유출 방지제도 개선', '연구개발 과정에서의 연구보안 및 선제적 기술보호 강화'를 정책개선 과제로 제시하였다. 본 연구가 산업보안 현장의 수요를 반영한 증거 기반 연구로서 관련 정책수립의 기초가 될 수 있기를 기대한다.

• 환경정책연구
• /
• 제13권2호
• /
• pp.21-38
• /
• 2014

지구의 온난화로 인하여 기온이 상승하고 이에 대응하여 수온 증가가 감지되고 있다. 하천의 수온 변화는 수질과 생태계, 특히 용존산소변화와 생물체의 이동으로 이어진다. 기온 변화가 하천의 수질과 생태 환경에 미치는 영향을 추정하기 위해서 수온 상승의 시기와 하천 어종에 대한 이해가 필요한데 이를 위하여 미래의 수온을 예측할 필요가 있다. 환경부 산하 국립환경과학원에서 설치한 국가수질관측망 자료와 기상청 기상관측소의 기온 자료를 활용하여 기온-수온 비선형 상관관계모형을 구축하였다. 기온-수온 대표 관계인 비선형 로지스틱(Logistic) 함수에 포함된 4개의 매개변수를 결정하기 위하여 SCE최적화 기법을 이용하였다. 기온-수온 상관관계는 시간규모에 따른 최대 온도와 최소 온도에 차이가 있으나 수질 또는 생태 반응의 적당한 시간규모에 해당하는 주 평균 온도를 이용하여 분석하였다. 전반적으로 우리나라 하천의 기온-수온 관계는 선형보다는 비선형 모형에서 NSC와 RMSE가 더 우수하여 비선형 모형이 적합한 것으로 나타났다. 연구 결과는 미래의 기온 상승 변화에 반응하는 수질, 수문 및 생태반응에 대비하여 공학기술자 또는 정책입안자에게 적절한 기후변화 대책 방향을 설정하는 데 지침을 제공할 것이다.

• 한국기후변화학회지
• /
• 제7권3호
• /
• pp.269-282
• /
• 2016

Watershed area can be submerged due to constructions and management of dams, and these change can impact not only on ecosystem and environment of river basin area but also on local climate. This study is conducted to construct and classify climate zones of Andong Dam watershed where the area is submerged due to the construction of the dam. By applying Principal Components Analysis (PCA) and Getis-Ord $Gi^*$ statistics, three climate zones were classified for the result. Each zone was then analyzed and validated with climatic and geological features including topography, land cover, and forest type map. As a result of the analysis, there was a difference in temperature, elevation, precipitation and tree species distribution among the zones. Also, an analysis of land cover map showed that there were more agricultural land near Andong Reservoir. This study on the climatic classification is considered to be useful as the basis for decision-making or policy enforcement regarding ecosystem, environmental management or climate change response.

• 아태비즈니스연구
• /
• 제10권3호
• /
• pp.113-124
• /
• 2019

With the decline in the college student population and the increase in the youth unemployment rate, the university began to be interested in starting a business. Under the initiative of the government, the start-up support project was reflected in the university's educational programs, which led to the university students receiving various start-up support benefits. In response to the expansion of entrepreneurship education, various entrepreneurship education programs and support programs were applied in line with the government's efforts to start college students. As a result, students' entrepreneurial competence and willingness to start up increased. College student entrepreneurs and entrepreneurs are increasing. The increase of university student start-up companies is taking place in the entrepreneurial education environment within the university, and the support of university, community, and start-up support institutions for university student start-up, the starting point of the start-up ecosystem, is paying off. It can be seen that the youth entrepreneurship ecosystem based on university entrepreneurship education is in place. The university supports the entire business process from idea development, such as start-up classes, start-up club support, patent application support, prototype development support, and investment linkage. However, there is a university that develops and operates a unique program for each school and a university that does not. Therefore, it is necessary to develop an education program that can produce efficient results. The purpose of this study is to support the start-up program of the university to be the consumer-centered start-up support.

• Journal of Ecology and Environment
• /
• 제47권1호
• /
• pp.1-13
• /
• 2023

Background: The positive effects of Arctic plants on the soil environment and plant-species co-occurrence patterns are known to be particularly important in physically harsh environments. Although three dominant plants (Cassiope tetragona, Dryas octopetala, and Silene acaulis) are abundant in the Arctic ecosystem at Ny-Ålesund, Svalbard, few studies have examined their occurrence patterns with other species and their buffering effect on soil-temperature and soil-moisture fluctuation. To quantify the plant-species co-occurrence patterns and their positive effects on soil environments, I surveyed the vegetation cover, analyzed the soil-chemical properties (total carbon, total nitrogen, pH, and soil organic matter) from 101 open plots, and measured the daily soil-temperature and soil-moisture content under three dominant plant patches and bare soil. Results: The Cassiope tetragona and Dryas octopetala communities increased the soil-temperature stability; however, the three dominant plant communities did not significantly affect the soil-moisture stability. Non-metric multidimensional scaling separated the sampling sites into three groups based on the different vegetation compositions. The three dominant plants occurred randomly with other species; however, the vegetation composition of two positive co-occurring species pairs (Oxyria digyna-Cerastium acrticum and Luzula confusa-Salix polaris) was examined. The plant species richness did not significantly differ in the three plant communities. Conclusions: The three plant communities showed distinctive vegetation compositions; however, the three dominant plants were randomly and widely distributed throughout the study sites. Although the facilitative effects of the three Arctic plants on increases in the soil-moisture fluctuation and richness were not quantified, this research enables a deeper understanding of plant co-occurrence patterns in Arctic ecosystems and thereby contributes to predicting the shift in vegetation composition and coexistence in response to climate warming. This research highlights the need to better understand plant-plant interactions within tundra communities.

• 한국어병학회지
• /
• 제33권1호
• /
• pp.35-43
• /
• 2020

Hypoxia is a serious problem in the marine ecosystem causing a decline in aquatic resources. MicroRNAs (miRNAs) regulate the expression of genes through binding to the corresponding sequences of their target mRNAs. Especially, miRNAs in the cytoplasm can be secreted into body fluids, which called circulating miRNAs, and the availability of circulating miRNAs as biomarkers for hypoxia has been demonstrated in mammals. However, there has been no report on the hypoxia-mediated changes in the circulating miRNAs in fish. miR-210 is known as the representative hypoxia-responsive circulating miRNA in mammals. To know whether fish miR-210 also respond to hypoxia, we analyzed the change of circulating miR-210 quantity in the serum of olive flounder (Paralichthys olivaceus) in response to hypoxia. The expression of hypoxia related genes, hypoxia inducible factor 1α (HIF-1α) and the heat shock protein 90α (HSP90α) was also analyzed. Similar to the reports from mammals, miR-210-5p and miR-210-3p were significantly increased in the serum of olive flounder in response to hypoxia, suggesting that circulating miR-210 levels in the serum can be used as a noninvasive prognostic biomarker for fish suffered hypoxia. The target genes of miR-210 were related to various biological processes, which explains the major regulatory role of miR-210 in response to hypoxia. The expression of HIF-1α and HSP90α in the tissues was also up-regulated by hypoxia. Considering the critical role of HIF-1α in miR-210 expression and HSP90 in miRNAs function, the present up-regulation of HIF-1α and HSP90α might be related to the increase of circulatory miR-210, and the interaction mechanism among HIF-1α, HSP90α, and hypoxia-responsive microRNAs in fish should be further studied.