• Journal of Microbiology and Biotechnology
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• 제26권4호
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• pp.730-738
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• 2016

est19 is a gene from Bacillus sp. K91 that encodes a new esterase. A comparison of the amino acid sequence showed that Est19 has typical Ser-Gly-Asn-His (SGNH) family motifs and could be grouped into the SGNH hydrolase family. The Est19 protein was functionally cloned, and expressed and purified from Escherichia coli BL21(DE3). The enzyme activity was optimal at 60℃ and pH 9.0, and displayed esterase activity towards esters with short-chain acyl esters (C₂-C₆). A structural model of Est19 was constructed using phospholipase A1 from Streptomyces albidoflavus NA297 as a template. The structure showed an α/β-hydrolase fold and indicated the presence of the typical catalytic triad Ser49-Asp227-His230, which were further investigated by site-directed mutagenesis. To the best of our knowledge, Est19 is a new member of the SGNH hydrolase family identified from thermophiles, which may be applicable in the industrial production of semisynthetic β-lactam antibiotics after modification.

• KIEAE Journal
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• 제10권3호
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• pp.81-88
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• 2010

Current trend on sustainable tall building shows significant efforts on the integrated design approaches for the performative design to achieve efficient building for the energy, structural and materials. The design of tall buildings should take into consideration of environmental impact and economic benefits from sustainable approaches to ensure low energy consumption and CO2 emissions. Designing sustainable tall building require concerns and comprehensive understanding of sustainable building technology, sustainable rating system and supporting incentive policy. The research has been conducted on available rating system and the incentive policy for sustainable building design methodology through cases studies for this study. In the paper, author tried to emphasis the role of the incentive policy for the sustainable building and provides survey of the impact on rating, adaptable use of sustainable building technology on the current practice of tall building design.

• 유통과학연구
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• 제20권7호
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• pp.47-56
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• 2022

Purpose: As the need to transition into the distribution of cleaner energy has garnered corporate and scholarly interests, this study aims to track the research trends in sustainable energy supply chains for five years before 2021. Research methodology: This study was conducted by a bibliometric literature review and analysis to map the field's evolution between 2016 and 2020. Out of an initial title search result of 2,484 papers from the Scopus engine, filtering led to 180 documents obtained. The data was exported in excel format (CSV) to VOSviewer software to generate and analyze network visualization of sustainable energy supply chain trends. Results: The results revealed China's the highest publishing country, with 36 research papers. The Journal of Cleaner Production was the top publishing source, with 22 papers per year. These findings showed five clusters formed in the bibliographic coupling of countries. Circular Economy and Green Supply Chain Management represent the current hot topics. Research gaps identified in the field included limited cross-industry testing and modifying sustainable supply chain models. Conclusion: This paper contributes to the sustainability literature on supply chains by providing an overview of trends and research directions for scholars' and practitioners' consideration in future research.

• Asia Pacific Journal of Business Review
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• 제2권1호
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• pp.21-52
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• 2017

Nowadays every technology is becoming smarter. Consequently, intensive use of ICT in the whole industries and cities enables a sustainable approach to meet enormous productivity, efficiency, transparency and conservation of natural recourses. Likewise, the role of ICT in terms of controlling, monitoring in the energy industry allows integrating potential renewables, bulk energy conservation and reliable optimized operation in the entire system. In this paper outlines challenging issues in renewable energy integration in Mongolia and proposes potential recommendations and conclusions. The author investigated the main technologies used in energy industry mainly smart grid, challenges and policy aspect in Mongolian energy sector by using the primary and secondary approach with case studies and literature based methodologies. Based on the policy aspect and current implementation of smart grid, the paper tries to address the readiness for the main application and future potential ICT driven applications. Furthermore, it concluded that ICT convergence is demanded to overcome the current vulnerabilities and significant momentum to leave behind by using its potential energy recourses and favorable geographical state. Policymakers may find this study useful, as it answers the question of whether ICT investment can ultimately reduce energy consumption and may aid in future planning. Even tough, in order to develop a smart grid and integrating renewables firstly set an appropriate market structure, ICT will key enabler to make energy system more profitable and sustainable. Regarding the result of this study, ICT deployment contribution is a huge demand for future opportunities energy in Mongolia.

• 자원ㆍ환경경제연구
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• 제25권1호
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• pp.61-87
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• 2016

독일은 환경 친화적이며 지구온난화현상에 직접적으로 영향을 미치는 이산화탄소 배출을 억제하는 방향으로 에너지정책을 실시하고 있다. 이를 기초로 환경 및 에너지 기술개발을 통한 지속가능한 성장정책을 실시하여 왔다. 따라서 독일의 에너지정책과 지속성장정책의 핵심을 이루는 요소는 재생에너지개발 보급제도, 생태적 에너지세, 배출권 거래제도 등이라고 할 수 있다. 특히 재생에너지 개발 및 보급을 통하여 화석연료 사용을 최소화하고 동시에 화석에너지 사용으로 인한 탄소배출비용을 지불하게 하는 탄소세 및 배출권거래 제도를 실시하여 재생에너지개발을 정책적으로 지원하고 있다. 본 논문은 재생에너지정책을 추진하면서 재생에너지 사용을 실질적으로 증가시키고 경제성장을 달성하여 환경에 미치는 부정적 영향을 최소화 하면서 지속가능한 발전이 현실적으로 가능한지에 대해 독일의 정책사례를 중심으로 한 조사 및 분석에 관한 연구이다. 실제로 경제성장을 위한 증가하는 에너지소비를 재생에너지로 대체할 수 있거나 경제성장을 달성하면서도 에너지소비가 증가하지 않는다면 환경에 부정적인 영향을 미치지 않고 지속가능한 성장을 달성할 수 있다. 이러한 전제조건을 충족시키는 모델사례가 독일의 에너지정책과 지속가능발전전략이며 이를 정책과 전략으로서 논리적으로 증명하는 것이 본 논문의 목적이다.

• 신재생에너지
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• 제20권1호
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• pp.110-115
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• 2024

Global sustainable energy needs and carbon neutrality goals make hydrogen a key future energy source. South Korea and Japan lead with proactive hydrogen policies, including South Korea's Hydrogen Law and Japan's strategy updates aiming for a hydrogen-centric society by 2050. A notable advance is the solar thermal chemical water-splitting cycle for green hydrogen production, spotlighted by Korea Institute of Energy Research (KIER) and Niigata University's joint initiative. This method uses solar energy to split water into hydrogen and oxygen, offering a carbon-neutral hydrogen production route. The study focuses on international collaboration in solar energy for thermochemical water-splitting and E-fuel production, highlighting breakthroughs in catalyst and reactor design to enhance solar thermal technology's commercial viability for sustainable fuel production. Collaborations, like ARENA in Australia, target global carbon emission reduction and energy system sustainability, contributing to a cleaner, sustainable energy future.

• 에너지공학
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• 제27권2호
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• pp.89-94
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• 2018

UNESCO is an international specialized agency based on the United Nations (UN) located in the Paris. The United Nations Educational, Scientific and Cultural Organization abbreviated as UNESCO. The mission and goal of UNESCO are to maintain the peace and security throughout the globe by encouraging international collaborations through educational, scientific, and cultural heritage in order to increase respect for principals of justice, international rules of law, and international human rights. Recently, the UNESCO published a new set of 17 goals for the nation's sustainable society. The Organization ensures to actively participate in UN activities to improve harmony and planning within the United Nations system. The 2030 agenda is primarily about shifting the world on to a sustainable and most in-depth. Currently, UNESCO launched broad goals and objectives for the international community including the Millennium Development Goals (MDGs). Among these sustainable goals, climate change, water security is more significant. In this paper, we briefly reviewed the seventeen goals by UNESCO.

• 국제초고층학회논문집
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• 제4권2호
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• pp.103-107
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• 2015

China's rapidly growing cities offer a unique opportunity to create highly sustainable communities. Architects and their clients, typically real estate developers, are highly focused on strategies that are effective at reducing energy and water usage at the scale of the individual building or within a master plan of multiple related buildings. However, a closer look at energy consumption reveals that transportation uses more energy worldwide than residential and commercial buildings combined. In light of this, it is appropriate that China is making massive investments in transportation infrastructure like heavy rail rapid transit and grade separated expressways, but the end result of these investments to date has been to enable people to live further from where they work and shop rather than closer - while simultaneously not creating walkable communities. Using positive and negative examples from Asia and the rest of the world, this article will investigate the specific urban design policies such as height limits, setbacks, land use restrictions, parking ratios, and parcel size which might change to enable the creation of truly sustainable communities for China's 21st century.

• Nuclear Engineering and Technology
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• 제52권4호
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• pp.797-801
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• 2020

Most of irradiated graphite that should be disposed comes from moderators and reflectors of nuclear power plants. The quantity of irradiated graphite could be higher in the future if high-temperature reactors (HTRs) will be deployed. In this case noteworthy quantities of fuel pebbles containing semi-graphitic carbonaceous material should be added to the already existing 250,000 tons of irradiated graphite. Industry graphite is largely used in industrial applications for its high thermal and electrical conductivity and thermal and chemical resistance, making it a valuable material. Irradiated graphite constitutes a waste management challenge owing to the presence of long-lived radionuclides, such as ¹⁴C and ³⁶Cl. In the ENEA Nuclear Material Characterization Laboratory it has been successfully designed a procedure based on the exfoliation process organic solvent assisted, with the purpose of investigate the possibility of achieving graphite significantly less toxic that could be recycled for other purpose [1]. The objective of this paper is to evaluate the possibility of the scalability from laboratory to industrial dimensions of the exfoliation process and provide the prototype of a chemical plant for the treatment of irradiated graphite.

• 한국환경과학회지
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• 제18권2호
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• pp.177-186
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• 2009

The changes in the worldwide paradigm of the sustainable development have started to be applied in the entire industry fields, and they come out as the sustainable tourism in the field of tourism. And the ecotourism has emerged as a practical method to meet the needs of the actual practice and the intellectual system for the sustainable tourism. In the type of tourists based on tourist attitude, 82.3% has the environment-friendly tourist attitude as a potential ecological tourist or an ecological tourist. In addition, there are the potentials of increase in ecological tourists as well as the revitalization of ecological tourism. First, the ecological tourists are mostly the well-educated and married professional workers at 40, housewives, and people earning a high income. Next, the potential ecological tourists are mainly the well-educated and married professional workers at 30, workers in the service industry, and middle-class citizens. Lastly, the general tourists are the students at 20 who are single, earn a low income, and has low level of education. This study presents useful data to the tourist business in terms of the development, operation and management of sustainable ecological tourism.