• 한국도서관정보학회지
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• 제48권4호
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• pp.283-301
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• 2017

최근 장애인과 일반인이 공통으로 사용가능한 통합 전자출판 포맷 출현이 예상된다. 이를 국가 대체자료 제작 전략에 적용한다면, 기존 DTD(Document Type Definition)를 이용한 대체자료 제작 전략의 문제점뿐만 아니라 수요자의 요구에 맞는 다양한 대체자료 보급도 가능할 것으로 예상된다. 이와같이 급변하는 장애인용 대체자료 제작 관리 전략의 변화에 대응하기 위해 국립장애인도서관의 주요 역할을 충분히 해내기 위해서는 '대체자료 제작', '대체자료 연구 교육', '대체자료 정보망 운영' 등 각 주요 역할을 중심으로 대체자료 관련 전문 인력으로 구성된 센터를 설립하여 전문 역량을 발휘할 수 있도록 조직을 확대 개편하여야 한다.

• 한국문헌정보학회지
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• 제51권3호
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• pp.215-246
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• 2017

시각장애인에게 대체자료는 정보접근 및 이용, 지식정보 격차해소, 사회참여 및 통합에 매우 중요한 요소이다. 그럼에도 불구하고 대체자료는 최근까지도 점자도서관 등의 자발적 노력과 자치단체의 재정지원 하에 개인의 요청이나 담당자의 판단으로 제작되고 있기 때문에 그 범위가 문학자료와 교양 취미도서로 한정되고 중복제작 될 뿐만 아니라 대체포맷 또한 매우 제한적이다. 이에 본 연구에서는 국내외 도서관 및 관련 단체의 대체자료 제작사례를 분석하고 시각장애인도서관과 시각장애인을 대상으로 설문조사 방식을 적용하여 대체자료 제작현황과 인식을 조사 분석하였다. 이를 바탕으로 대체자료 제작 및 이용 활성화를 위한 개선방안을 제시하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권3호
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• pp.410-416
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• 2010

Methane emitted from ruminant livestock is regarded as a loss of feed energy and also a contributor to global warming. Methane is synthesized in the rumen as one of the hydrogen sink products that are unavoidable for efficient succession of anaerobic microbial fermentation. Various attempts have been made to reduce methane emission, mainly through rumen microbial manipulation, by the use of agents including chemicals, antibiotics and natural products such as oils, fatty acids and plant extracts. A newer approach is the development of vaccines against methanogenic bacteria. While ionophore antibiotics have been widely used due to their efficacy and affordable prices, the use of alternative natural materials is becoming more attractive due to health concerns regarding antibiotics. An important feature of a natural material that constitutes a possible alternative methane inhibitor is that the material does not reduce feed intake or digestibility but does enhance propionate that is the major hydrogen sink alternative to methane. Some implications of these approaches, as well as an introduction to antibiotic-alternative natural materials and novel approaches, are provided.

• 융복합기술연구소 논문집
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• 제3권1호
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• pp.9-14
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• 2013

Recently, the development of renewable energy sources in Mongolia has been needed due to climate change and air pollution in Ulaanbaatar as rapid economic growth. Biodiesel can be considered as an alternative fuel for petroleum based diesel in order to decrease air pollution in Ulaanbaatar because of its no emission of particle materials from internal combustion engine in automobile. Rapeseed oil having low cloud point and pour point was suggested as a promising raw material for biodiesel production in Mongolia. Considering high population density and severe air pollution by particle materials and SOx in Ulaanbaatar, prior supplying site of biodiesel in Mongolia was the capital region including Ulaanbaatar. In the production of biodiesel in Mongolia, adsorption process was a effective alternative to washing process for the removal of residual alkali catalyst and reactants due to long winter time in Mongolia. For the stable supply of biodiesel, subsidy and no tax policy is needed in the early stage of biodiesel supply in Mongolia.

• Journal of Microbiology and Biotechnology
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• 제34권5호
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• pp.994-1002
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• 2024

The rise in plant-based food consumption is propelled by concerns for sustainability, personal beliefs, and a focus on healthy dietary habits. This trend, particularly in alternative meat, has attracted attention from specialized brands and eco-friendly food companies, leading to increased interest in plant-based alternatives. The dominant plant-based proteins, derived mainly from legumes, include soy protein isolates, which significantly impact sensory factors. In the realm of plant-based fats, substitutes are categorized into fat substitutes based on fats and fat mimetics based on proteins and carbohydrates. The production of these fats, utilizing gums, emulsions, gels, and additives, explores characteristics influencing the appearance, texture, flavor, and storage stability of final plant-based products. Analysis of plant-based proteins and fats in hamburger patties provides insights into manufacturing methods and raw materials used by leading alternative meat companies. However, challenges persist, such as replicating meat's marbling characteristic and addressing safety considerations in terms of potential allergy induction and nutritional supplementation. To enhance functionality and develop customized plant-based foods, it is essential to explore optimal combinations of various raw materials and develop new plant-based proteins and fat separation.

• 정보관리학회지
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• 제39권3호
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• pp.51-67
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• 2022

본 연구는 국내에서 서비스되는 대체자료 장서 수준을 진단하고 향후 대체자료 장서개발의 방향성과 목표지향점을 제시하는 데 목적이 있다. 국가대체자료종합목록과 국내 인기도서 및 신간도서 목록을 장서기반 평가방법을 활용하여 비교·분석하였다. 연구결과 첫째, 10년간 인기도서 목록 기준 대체자료 장서 비율은 90.1%이다. '언어', '예술', '기술과학' 주제의 대체자료 장서 비율이 낮은 편이며, 제작 매체별은 '텍스트 데이지자료'의 비율이 높았다. 둘째, 국가대체자료종합목록을 기준으로 주제별, 매체별, 제작기관별 공통장서 확보율과 장서고유성 지수를 분석한 결과 대체자료의 소장 장서량이 많은 도서관에서 공통장서와 고유장서의 편향성이 높게 나타났다. 공통장서 확보율이 높은 주제는 문학과 사회과학 순이며, 장서고유성 지수가 높은 주제는 종교, 예술, 언어 순으로 나타났다. 셋째, 최근 3년간 신간도서의 대체자료 장서 비율은 5.09%이며 같은 기간 동안 공공도서관의 평균 도서구입율은 8.83%이다. 신간도서 대비 대체자료 장서 비율의 적정 기준은 존재하지 않으며 시각장애인의 정보격차 해소를 위해 신간도서 대비 대체자료 장서 비율을 공공도서관 도서구입율 수준으로 높일 것을 제언하고자 한다.

• Journal of Microbiology and Biotechnology
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• 제25권2호
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• pp.185-195
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• 2015

Glucoamylase is an important industrial enzyme. Glucoamylase production by industrial Aspergillus niger strain featured with two major problems: (i) empirical substrate feeding methods deteriorating the fermentation performance; and (ii) the high raw materials cost limiting the economics of the glucoamylase product with delegated specification. In this study, we first proposed a novel three-stage varied-rate substrate feeding strategy for efficient glucoamylase production in a 5 L bioreactor using the standard feeding medium, by comparing the changing patterns of the important physiological parameters such as DO, OUR, RQ, etc., when using different substrate feeding strategies. With this strategy, the glucoamylase activity and productivity reached higher levels of 11,000 U/ml and 84.6 U/ml/h, respectively. The performance enhancement in this case was beneficial from the following results: DO and OUR could be controlled at the higher levels (30%, 43.83 mmol/l/h), while RQ was maintained at a stable/lower level of 0.60 simultaneously throughout the fed-batch phase. Based on this three-stage varied-rate substrate feeding strategy, we further evaluated the economics of using alternative carbon sources, attempting to reduce the raw materials cost. The results revealed that cornstarch hydrolysate could be considered as the best carbon source to replace the standard and expensive feeding medium. In this case, the production cost of the glucoamylase with delegated specification (5,000 U/ml) could be saved by more than 61% while the product quality be ensured simultaneously. The proposed strategy showed application potential in improving the economics of industrial glucoamylase production.

• International Journal of Industrial Entomology and Biomaterials
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• 제31권2호
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• pp.48-55
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• 2015

1-Deoxynojirimycin (DNJ) has been extensively investigated for its applications as an a-glucosidase inhibitor in postprandial hyperglycemia, and has been applied to nutraceuticals and medicines to prevent or delay the progression of type 2 diabetes. However, the amount of DNJ in mulberry leaves is low (approximately 0.1%), therefore, a more effective extraction method is needed. In this study, microbial DNJ production was developed as an alternative to chemical methods. We identified fermented sericultural products and bacteria that produce DNJ in large quantities using high performance liquid chromatography and thin layer chromatography. The inhibition of a-glucosidase activity was examined with respect to DNJ production or non-production. Crude DNJ from the isolated strains exhibited greater than 70% a-glucosidase activity. An investigation of the effect of mulberry leaf powder concentration (1~5%), using high DNJ producing bacteria, provided evidence for microbial mass production of DNJ.

• 한국도로학회논문집
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• 제2권2호
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• pp.149-161
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• 2000

회복탄성계수$(M_R)$로 표현되는 보조기층 재료의 탄성계수는 연성 포장체의 역학적 설계에 대단히 중요한 물성치이다. 그러나 반복재하식 $M_R$ 시험을 일상적 시험으로 적용하기에는 너무 시험과정이 복잡하고, 고가이며, 많은 시험시간을 필요로 한다. 본 연구에서는 보조기층 재료의 변형특성을 고려하여 현장공진주시험(EF-RC)을 이용한 대체 $M_R$ 시험법을 개발하였다. 보조기층 재료의 변형특성 평가를 위하여 변형률 크기 및 평균주응력의 탄성계수에 대한 영향을 조사하였다. 제안한 대체 $M_R$ 시험법으로 결정된 탄성계수와 반복재하식 $M_R$ 시험에서 결정된 회복탄성계수는 서로 잘 일치하여 제안된 기법의 효용성을 확인하였다.

• International Journal of Industrial Entomology and Biomaterials
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• 제33권1호
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• pp.24-30
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• 2016

1-Deoxynojirimycin (DNJ) have been extensively investigated for their α-glucosidase inhibitor on postprandial hyperglycemia, and applied in nutraceuticals and medicine for preventing or delaying progression of type 2 diabetes. However, the amount of DNJ in mulberry leaves is low (about 0.1%), therefore, more effective extraction method is needed. This study was performed to develop microbial DNJ for biological methods of DNJ as an alternative to the chemical methods. In this study, we obtained evidence for Bacillus subtilis that produce DNJ in large quantities by high performance liquid chromatography. Inhibition of α-glucosidase activity was determined to DNJ production or non-production. Investigation of the effect of mulberry leaves powder concentration (1~5%), using the DNJ high-production bacteria, provided evidence for microbial mass production of DNJ. When the 4% mulberry leaf powder for 9 days was used, the α-glucosidase inhibitory activity was over the 85%. Also, the results presented in this study confirm DNJ yield's increasement in microbes using the various of nutrients and provide insight of ways to improve DNJ yields in microorganisms.