• 한국수산과학회지
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• 제37권2호
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• pp.85-90
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• 2004

The effect of the hydraulic residence time (HRT) for the removal of aquarium waste, such as protein, total suspended solids (TSS) and turbidity were investigated by using a foam separator Protein, TSS and turbidity removal efficiencies were increased with the increase of hydraulic residence time. The optimum hydraulic residence time was 0.5 min, and the highest protein and TSS removal rates were $14.4\;g/L{\cdot}day\;and\;38.9\;g/L{\cdot}day,$ respectively. The tendency of turbidity removal rate and efficiency was similar to that of protein.

• Fisheries and Aquatic Sciences
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• 제20권11호
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• pp.28.1-28.17
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• 2017

Members of the phylum Echinodermata, commonly known as echinoderms, are exclusively marine invertebrates. Among the Echinodermata, sea cucumber belongs to the family Holothuroidea. The sea cucumber Stichopus (Apostichous) japonicus (Selenka) is an invertebrate animal inhabiting the coastal sea around Korean, Japan, China, and Russia. Sea cucumber has a significant commercial value, because it contains valuable nutrients such as vitamins and minerals. They possess a number of distinctive biologically and pharmacologically important compounds. In particular, the body wall of sea cucumber is a major edible part. It consists of peptide, collagen, gelatin, polysaccharide, and saponin, which possess several biological activities such as anti-cancer, anti-coagulation, anti-oxidation, and anti-osteoclastogenesis. Furthermore, the regenerative capacity of sea cucumber makes it a medically important organism. This review presents the various biological activities and biomedical potential of sea cucumber S. japonicus.

• 한국미생물·생명공학회지
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• 제48권3호
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• pp.358-365
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• 2020

An organic solvent- and bleach-stable protease-producing strain was isolated from a polluted river water sample and identified as Aeromonas veronii OB3 on the basis of biochemical properties (API 20E) and 16S rRNA sequence analysis. The strain was found to hyper-produce alkaline protease when cultivated on fish waste powder-based medium (HVSP, 4080 U/ml). The biochemical properties and compatibility of OB3 with several detergents and additives were studied. Maximum activity was observed at pH 9.0 and 60℃. The crude protease displayed outstanding stability to the investigated surfactants and oxidants, such as Tween 80, Triton X-100, and H₂O₂, and almost 36% residual activity when incubated with 1% SDS. Remarkably, the enzyme demonstrated considerable compatibility with commercial detergents, retaining more than 100% of its activity with Ariel and Tide (1 h, 40℃). Moreover, washing performance of Tide significantly improved by the supplementation of small amounts of OB3 crude protease. These properties suggest the potential use of this alkaline protease as a bio-additive in the detergent industry and other biotechnological processes such as peptide synthesis.

• 농촌계획
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• 제20권3호
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• pp.45-53
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• 2014

This study classifies the types of visitors to experiential fishing villages and analyses the features and target marketing strategies by categorical groups. Seven factors are extracted by Factor Analysis and the results of Cluster Analysis indicate the classification of five groups. The first group puts emphasis on the family connection, so family centered facilities and programs are necessary. The second group is composed of surrounding area residents whose purpose of visit is unclear. So environmentally friendly village development programs to encourage local patriotism are necessary. The third group puts emphasis on the necessary facilities and programs for experiencing the fishing village and traditional play, etc. The fourth group emphasizes programs related with the region and the means to satisfy visitor's aesthetic desires. Finally, the fifth group aims at various desires that are generally felt in experiential fishing villages. So this group requires marketing strategies from the public point of view. The existing research mostly surveys rural tourism villages, but this study highlights the difference in dealing with fishing villages as opposed to rural villages, from the perspective of industry and settlement.

• 한방안이비인후피부과학회지
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• 제22권2호
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• pp.223-237
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• 2009

본 임상연구는 임상연구 모집 공고를 통하여 모집된 대상자 중 Atopic Dermatitis Research Group (2005) 한국인 아토피 피부염 진단기준에 따라 아토피 피부염으로 판정되고 현재 약물(한약, 양약)치료나 외용제 치료를 하고 있지 않은 만 5$\sim$50세의 아토피 피부염 환자를 대상으로 하였다. 피험자들을 이중맹검, 블록무작위배정하여 시험군과 대조군으로 나누어 6주간의 시험기간 동안 육안적 평가, 혈액학적 검사, 피부측정 장비를 통한 기기적 평가를 시험 전후에 실시하여, 시험군에 사용된 제품이 대조군 사용된 제품에 비하여 얼마나 효과적으로 아토피 피부염으로 손상된 피부 장벽을 회복하는지 관찰하였다. 본 임상시험을 통해 'Atomento solution & cream'이 손상된 피부장벽을 회복시키고 피부 보습력을 증가시켜 아토피 피부염에 효과적이었으며, 인체에 이상반응이나 부작용 없이 안전하게 사용될 수 있음을 확인하였다.

• Journal of Welding and Joining
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• 제33권3호
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• pp.40-46
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• 2015

Welding is one of the most fundamental and necessary work in the industry that demand sophistication of skilled workers. This study is to introduce welding simulator as a training tool, to verify its effectiveness and to measure satisfaction of the trainees. A group of freshman students at a Korea Polytechnics College in their twenties with less experience of welding participated in the study. They were divided into two groups and took a traditional training course (comparison group) and a training course with welding simulator applied reality/haptic technology (experimental group) for same hours respectively. To evaluate training effect, a national certificate test and a survey based on Phillips' ROI (Return on Investment) methodology were conducted by the students and the college respectively. And satisfaction survey among the students based on Kirkpatrick's Four-Level Evaluation Model was also carried out. The results showed that all students in the experimental group passed the national certificate test and the ROI of the experimental group for five years were 110% higher than the comparison group. Furthermore, 25% more students in the experimental group replied "very satisfied" about the overall training course and 75% more students in the same group found that the simulation was very similar to the real welding.

• 한국식품저장유통학회지
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• 제17권1호
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• pp.165-168
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• 2010

쌀겨의 발효는 온도상승이 되면서 열을 많이 발생하여 온도가 60-70도로 상승한다. 이 발효에서 분리된 Bacillus coagulans는 효소온욕시 사용되는 주요 미생물로서, 이를 응용하여 피부미용건강에 사용되어질 수 있다. 쌀겨발효 중 온도유지에 관련이 있는 major microflora의 분리 연구를 수행한 결과, 고초균이라 판단되는 균주 10여종을 분리하였으며 이를 분자분류학적인 연구를 수행한 결과 Bacillus coagulans로동정하였다. 본 균주는 쌀겨발효에서 온도상승에 관여하는 주요 미생물로서 이의 피부미용에의 응용이 가능하리라 판단된다.

• 한국인터넷방송통신학회논문지
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• 제13권6호
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• pp.297-303
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• 2013

본 연구는 스마트폰 이용자들이 인식하고 있는 모바일 커머스 특성과 이러한 특성 인식이 모바일 쇼핑 이용의도에 미치는 영향을 파악하고자 이루어졌다. 연구결과, 스마트폰 이용자들의 모바일 커머스 특성 인식은 모바일 쇼핑 이용의도에 정의 영향을 미치는 것으로 나타났고, 모바일 쇼핑 이용경험 유무 집단별로 편재성, 개인화, 즉시접속성 등의 모바일 커머스 특성 인식과 모바일 쇼핑 이용의도에 유의한 차이가 있었다. 또한 모바일 커머스 특성 인식이 모바일 쇼핑 이용의도에 미치는 영향은 모바일 쇼핑 이용경험 집단에서 더 크게 나타났다. 따라서 본 연구결과를 토대로, 모바일 커머스 시장에서 경쟁하고 있는 기업들은 보다 효과적인 마케팅전략방안을 도출해야 할 것이다.

• 농촌지도와개발
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• 제11권1호
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• pp.175-189
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• 2004

There are many assertions related to biotechnology and genetically modified organisms(GMOs). Some experts have asserted that GM foods could be dangerous and that there is no reliable evidence that have been demonstrated safe through appropriate tests, and the others asserted these foods are as safe and nutritions as their conventional counterparts. The objectives of this study was to study an societal implications of biotechnology and GMOs in agriculture. To keep the balance in mind the researcher examined not only usefulness but also harmfulness of GMOs, along with the developmental process of biotechnology industry. It was observed that basically, multinational corporations developed GMOs to maximize their profit, and strengthened their control on agriculture and food through GMOs, as observed in alliance among big multinational corporations' food chain cluster and systems. Under the situation, farmers were losing their status as independent producer and were becoming propertied labor for multinational corporation through contract farming. If these trends continuous in the future, multinational corporations will have the control of genetic resources, these may bring about reduction of bio-diversity, thus may lead the opposite direction to eco-friendly agriculture. If multinational corporations' tendency to suppress the latent harmfulness for the profit continuous further, this may lead the degradation phase of farming and agriculture, thus leading negative socio-economic effects as well as culture and religion.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.468-474
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• 2005

SOx and NOx are known major precursors of acid rain and thus the abatement of their emissions is a major target in air pollution control. To obtain basic data on the removal process of simultaneous $SO_2/NO$, the optimal reaction condition and the composition of reaction solution for simultaneous removal of $SO_2/NO$, ware investigated using a bubble column reactor. Pilot scrubber was consisted of scrubber, filter and control box. Dust removal rate was 83, 92, and 97% with catalyst flux of 0.5, 0.8, 1.5 L/min, respectively Average dust removal efficiency with a kind of nozzle was about 94 and 90% in STS FF6.5 (5/8in.) and 14 of P.P W(1.0in.), respectively Dust and $SO_2$ were removed more than 98-96% regardless of reactor number. In the case of NO gas, removal yield of 83.3% was achieved after 48 hours in 1 stage, also removal yield of 95.7% was reached in 2 stages. In tile case of application of STS (5/8 in.) and P.P (1.0 in.) as used fill packing, removal efficiency was reached higher than 98% without related to of kind of fill packing.