• 한국습지학회지
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• 제21권4호
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• pp.354-364
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• 2019

스리랑카는 지리적으로 섬으로 형성된 국가로 기후변화에 민감한 나라이다. Kurunegala시는 2009년부터 2019년까지 약 11년 동안 도심지 내 연평균 기온이 0.69±0.37℃로 꾸준하게 증가하였으며, 강우패턴도 변화하고 있다. 그러나 도시 개발 계획시 기후변화 및 기후재난에 대한 규정이 미흡하여 인적 및 물적 피해가 우려되고 있다. 따라서 본 연구는 스리랑카 Kurunegala시의 인문학적 및 자연적 특성을 조사분석하고 기후변화 적응에 대한 방안을 수립하기 위하여 수행되었다. Kurunegala시의 기후변화 적응방안은 기후변화에 대한 정성적 위험 평가를 수행하여 개발하였다. 정성적 위험평가 결과 Kurunegala시의 주요 문제점은 음용수, 수자원 및 건강 관련 인프라로 분석되었다. 물부족 및 도시 내 온도를 완화하기 위한 방안으로는 기존 사회인프라에 비점오염저감, 도시 열섬현상 저감 및 건전한 물순환 체계 구축 등 다양한 효과를 유도하는 저영향개발기술(Low Impact Development, LID)의 적용이 효과적인 것으로 나타났다. 본 자료는 Kurunegala시와 같이 기후변화에 따른 물문제를 안고 있는 도시의 물문제 해결에 활용될 수 있다.

• 대한치과의사협회지
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• 제57권12호
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• pp.747-756
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• 2019

This paper reviews the adaptation accuracy and mechanical properties of currently used denture processing systems with base resin materials and introduces the latest research on the development of antimicrobial denture base resins. Poly(methyl methacrylate) has been successfully used as a dental denture base resin material by the compress-molding method and heat polymerization for a long time, but recently, new processing techniques, injection molding-methods or fluid-resin technique are also used for fabricating denture base. However, studies indicated that there was no difference between the injectionmolding and the conventional compression-molding method in terms of adaption accuracy of denture base. The fluid-resin fabrication and one injection-molding systems exhibited better adaptation accuracy than the other processing methods. Resin denture bases in the oral cavity may undergo midline fractures due to flexural fatigue from repeated masticatory loading. For those patients, impact resistant denture base resins are recommended to prevent denture fracture during service. Thermoplastic denture base resins can be helpful for patients suffering from allergic reaction to resin monomers with a soft-fit, however, thermoplastic resins with low stiffness can irritate gum tissues and accelerate abnormal alveolar ridge resorption. Moreover, due to low chemical durability in oral cavity, those should be used for a limited period of time.

• 미생물학회지
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• 제38권1호
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• pp.45-49
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• 2002

Bradyrhizobium japonicum 은 콩과 식물의 뿌리에 감염하여 뿌리흑을 형성 질소를 고정하는 독특한 능력을 갖는 토양 세균이며 미생물 비료제로 사용되고 있다. 본 연구에서는 저온에서 전처리한 B . japonicum 균주를 여러 가지 환경스트레스 조건에 노출하였을 때 생균수의 변화를 확인하였다. 저온 전처리는 16시간 동안 $4^{\circ}C$의 조건을 유지했다. 다양한 스트레스(알콜, 과산화수소, 고온, 건조)에 노출하였을 때, 저온 전처리한 것이 그렇지 않는 것보다 10~1,000배 정도 높은 생균수를 유지하였다. 이러한 내성중진 현상에 전처리 동안 새로운 단백질 합성이 수반되는 것을 단백질 합성 저해제 인 chloramphenicol을 전처리 과정에 포함하여 확인하였다. 저온 스트레스 내성에 관여하는 유전자를 B. japonicum genome 으로부터 중폭하였고 염기서열 분석을 실시하였다. 실험에서 확인된 B . japonicum의 CSP (Cold shock protein) 단백질의 부분적 아미노산 서열은 이미 확인된 다른 균주의 Csp 단백질과 유사함을 확인하였다.

• 한국가금학회지
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• 제47권4호
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• pp.219-227
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• 2020

기후변화는 현대 축산업이 직면한 가장 큰 위협 중의 하나이고, 특히 열 스트레스는 가금의 생산성 저하뿐만 아니라, 가축의 불편함과 고통을 증가시켜 동물의 복지에도 치명적 영향을 미칠 수 있다. 열 스트레스를 완화시키기 위한 다양한 전략들이 요구되는데, 가축의 열 스트레스에 대한 정확한 평가와 생물학적 평가지표의 개발은 기후변화에 대한 적응과 열 저항성 가금의 육종, 지속 가능한 가금 산업과 동물복지를 위해서 매우 중요하다. 스트레스호르몬, hetero- phils lymphocytes의 비율, 텔로미어 마모 정도 등 열 스트레스에 대한 다양한 바이오마커 중에 열충격단백질(HSPs)은 세포내 온도계로 여겨지며, HSPs 중에서도 HSP70은 가장 풍부한 단백질이면서 열 충격에 민감하게 반응하는 바이오 마커로 알려져 있다. HSP는 또한 열 충격으로부터 세포를 보호해주는 샤페론 활성을 지니고 있다. 따라서 HSP70 바이오마커는 가축의 열 스트레스에 대한 체계적 평가방법으로 주목받고 있으며, HSP70의 발현 변화의 이해는 기후변화에 대처하면서 지속가능한 가금 산업을 위해 매우 중요하고 판단된다. 이에 본 논문에서는 닭의 열 스트레스와 관련하여 HSP70을 중심으로 HSP의 작용기전과 역할, 열 스트레스와 HSP, 내열성 가축 선발을 위한 HSP70의 잠재성, 그리고 열 스트레스 바이오마커로서의 HSP70 등에 대한 최근까지의 연구들을 소개한다.

• 한국기후변화학회지
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• 제4권4호
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• pp.331-348
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• 2013

기후변화로 인해 우리나라는 이상기후 현상의 빈도와 강도가 증가하고 있으며, 이로 인한 재난재해 피해가 급증하고 있다. 취약성 평가는 환경적, 사회적, 경제적 요인에 취약한 지표를 분석하고, 기후변화로 인한 피해를 방지하고, 적응대책을 수립하기 위해 계속적으로 연구되고 있다. 본 연구에서는 가중치 산정 방법인 회귀분석을 활용한 취약성 평가를 실시하였다. 평가는 전국을 대상으로 홍수에 의한 농경지 침식/침하 취약성, 폭염에 의한 건강 취약성, 가뭄에 의한 산불 취약성 평가를 실시하였다. 이를 위해 각 부문별로 규준 별 지표를 선정한 뒤, GIS 프로그램을 통해 지표를 공간자료 형태로 구축하였다. 그 결과, 폭염에 의한 건강 취약성 평가에서는 기후적인 요인의 영향이 큰 것으로 나타났으며, 산불 취약성과 농경지 침식/침하 취약성 평가에서는 인위적인 요인의 영향이 큰 것으로 나타났다. 이후 가중치를 적용하지 않은 취약성 평가와 비교를 통하여 회귀분석의 효율성을 분석하였다. 본 연구는 회귀분석 방법이 현실적으로 기후변화 적응 대책을 수립하는데 효율성이 있다고 제시하며, 향후 취약성 평가에 활용될 가능성이 있을 것으로 기대된다.

• 농업과학연구
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• 제47권3호
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• pp.597-604
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• 2020

Exposure to heat stress (HS) has negative effects on pig production and health. Plasma concentrations of amino acids (AAs) can be used as indicators of HS. Therefore, this study was conducted to evaluate the effect of acute HS on feed intake, water drink, and plasma AAs in pigs. A total of 6 growing pigs (n = 6, 3 boars and 3 gilts) were raised in thermal neutral (TN; 25℃) conditions for the 5-d adaptation period as a control. After the adaptation, pigs were exposed to HS at 33℃ (HS33) for 24 h. All the pigs were fed the same diet formulated to meet or exceed predicted requirements during the whole experimental period. Blood samples were collected after the adaptation and heat treatment to verify the AAs. Measurements were the average daily feed intake (ADFI), average daily water intake (ADWI), water loss, tumor necrosis factor (TNF)-α, nitrate, total nitric oxide, and AAs in the plasma samples. Data were analyzed using the PROC GLM of SAS. HS33 had a lower ADFI (p < 0.05) and a tendency for an increased ADWI and water loss compared to TN. The level of TNF-α was significantly decreased (p < 0.05) in HS33. HS33 had a lower concentration of histidine and sarcosine compared to TN; however, there were no differences in the levels of nitrates and total nitric oxide. In conclusion, the results of this study show the differential effect of HS on the plasma concentration of AAs. We expect that the changed AAs could be potential indicators of HS.

• 보건교육건강증진학회지
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• 제31권4호
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• pp.51-62
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• 2014

Objectives: The objective of study was to calculate the municipal level environmental burden of disease (EBD) due to heat wave. Methods: The data used were Korea National Health Insurance 2011 claim data and 2011 death registry. Heatwave related diseases included hypertensive heart diseases, ischemic heart diseases, cerebrovascular disease, and heat related illness. According to the method that WHO proposed, the study computed population-attributable fraction with relative risk which come from previous study and proportion of exposure which the study calculated with historical meteorology data. Results: The Average of 251 municipal EBD was 2.11 per thousand persons. The value of years lost due to disability was 11 times higher than that of years of life lost. On average EBD of county and southern geographical areas tended to be higher than those of District or city areas. The relationship between municipal deprivation index (composite deprivation index) and EBD showed the positive association, which means that the worse deprived municipal is, the higher EBD takes. Conclusions: Climate change is getting one of the major risk factors of cardio-cerebrovascular disease, which is the second leading cause of death. The study results suggested the urgent policy planning and reaction of climate change adaptation.

• 한국지역사회생활과학회지
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• 제17권2호
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• pp.49-60
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• 2006

It was measured the energy expenditure in each season, the cold tolerance in winter and the heat tolerance in summer. Farmers' adaptability to the change of environment was compared with those of city-dwellers such as indoor workers and street cleaners to determine the effect of living environment, especially living temperature, on the health of human body. It turned out that farmers had experienced wide range of temperature that was higher in summer and lower in winter than indoor workers. Farmers and street cleaners showed seasonal adaptation in energy expenditure, which was high in winter and low in summer. However, indoor workers did not show seasonal changes. Energy expenditure had an inverse correlation with the temperature in work place where subjects spend the longer time in a day except in female indoor workers in Seoul. And It was proved that farmers and street cleaners had stronger cold tolerance and heat tolerance than indoor workers.

• 한국환경보건학회지
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• 제39권6호
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• pp.492-504
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• 2013

Objectives: This analysis seeks to evaluate the impact of environmental health factors (EHF; e.g. hospital beds per capita, employees of medical institutions) on extreme-heat vulnerability assessment in Busan Metropolitan City during 2006-2010. Methods: According to the vulnerability concept suggested by the Intergovernmental Panel on Climate Change (IPCC), extreme-heat vulnerability is comprised of the categories of Exposure, Sensitivity, and Adaptive Capacity (including EHF). The indexes of the Exposure and Sensitivity categories indicate positive effects, while the Adaptive capacity index indicates a negative effect on extreme-heat vulnerability. Variables of each category were standardized by the re-scaling method, and then each regional relative vulnerability was computed with the vulnerability index calculation formula. Results: The extreme-heat vulnerability index (EVI) excepting EHF was much higher in urban areas than in suburban areas within the metropolitan area. When EHF was considered, the difference in the EVI between the two areas was reduced due to the increase of the Adaptive capacity index in urban areas. The low EVI in suburban areas was induced by a dominant effect of natural environmental factors (e.g. green area) within the Adaptive capacity category. Conclusions: To reduce the vulnerability to extreme heat in urban areas, which were more frequently exposed to extreme heat than others areas, public health and natural environments need to be improved in sensitive areas.

• 한국환경과학회지
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• 제28권7호
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• pp.617-627
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• 2019

This study investigated the relationship between heat-related illnesses obtained from healthcare big data and daily maximum temperature observed in seven metropolitan cities in summer during 2013~2015. We found a statistically significant positive correlation (r = 0.4~0.6) between daily maximum temperature and number of the heat-related patients from Pearson's correlation analyses. A time lag effect was not observed. Relative Risk (RR) analysis using the Generalized Additive Model (GAM) showed that the RR of heat-related illness increased with increasing threshold temperature (maximum RR = 1.21). A comparison of the RRs of the seven cities, showed that the values were significantly different by geographical location of the city and had different variations for different threshold temperatures. The RRs for elderly people were clearly higher than those for the all-age group. Especially, a maximum value of 1.83 was calculated at the threshold temperature of $35^{\circ}C$ in Seoul. In addition, relatively higher RRs were found for inland cities (Seoul, Gwangju, Daegu, and Daejeon), which had a high frequency of heat waves. These results demonstrate the significant risk of heat-related illness associated with increasing daily maximum temperature and the difference in adaptation ability to heat wave for each city, which could help improve the heat wave advisory and warning system.