• 인터넷정보학회논문지
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• 제25권1호
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• pp.17-27
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• 2024

수산자원의 남획, 기후변화 및 어업종별 경쟁 조업 등으로 어업생산량은 지속적으로 감소하고 있다. 이러한 문제점을 개선하고자 개별어종에 대해 연간 어획량을 설정하여, 그 한도 내에서만 어획을 허용하는 수산자원 관리제도인 TAC(총허용어획량 제도)를 제정하였다. TAC 제도의 일환으로 육상 조사원이 위판장 어종의 체장, 체고를 측정하여 무게를 산출하여 TAC 소진량을 산출한다. 하지만 육상 조사원의 숙련도에 따라 취득 데이터의 정확도가 상이하고 노동 집약적 업무로 인해 지속가능 하지 못하다. 이러한 문제점을 개선하고자 본 논문에서는 물제와의 거리를 측정할 수 있는 스마트 패드의 카메라를 이용하여 TAC 관리 여덟 어종의 체장, 체고를 측정하고 무게를 산출하고 자동화하는 어종 인식 및 체장 측정 시스템을 제안하고자 한다. 이를 통해 현행 노동 집약적 업무의 스마트화와 데이터 누락을 최소화하여 TAC 제도 확립을 기대할 수 있다.

• Fisheries and Aquatic Sciences
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• 제15권4호
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• pp.265-273
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• 2012

The effects of processing and frozen storage conditions on the quality of anchovy Engraulis japonica fried surimi gels were investigated. Protein content decreased after surimi gel processing from 19.6% (raw meat) to 12.1% (kamaboko) due to the added ingredients and change in water content. Lipid content decreased from 2.8% (raw meat) to 1.3% in minced and 0.5% in surimi, but fried kamaboko showed a 6.9 % lipid level. Thiobarbituric acid values and thiobarbituric acid reactive substances levels were highest in kamaboko samples, 89.5 and 1.9 mg/g solid, and increased gradually with storage time to 101.8 and 4.6 mg/g solid, respectively. In vitro protein digestibility increased from 79.2% in raw anchovy to 88.5% in kamaboko samples. Levels of trypsin inhibitor decreased gradually with processing and during storage time from 2.43 in raw anchovy to 0.31 mg/g solid in the kamaboko sample after 60 days of frozen storage. No noticeable changes in total essential amino acid was observed during processing conditions. Computed protein efficiency ratio for kamaboko was highest (2.59) compared with whole anchovy (1.96), minced (1.94) and surimi (2.50). Fresh fried anchovy kamaboko showed similar values of hardness, springiness, gumminess and chewiness to commercial surimi gel, but a higher values were seen for fracturability and adhesiveness, and lower values for cohesiveness and resilience. The frozen and thawed anchovy kamaboko showed higher values for all of these rheological parameters compared with fresh and commercial kamaboko. Anchovy kamaboko showed the lowest lightness (62.9) and redness (0.16) and similar yellowness (11.9) compared with commercial kamaboko. Frozen storage and vacuum packaging were effective maintaining the shelf life of anchovy kamaboko within 30 days, but were not effective after 45 days due to fat oxidation.

• 생명과학회지
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• 제28권4호
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• pp.472-477
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• 2018

Pravastatin은 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) 환원효소 억제제이며, 혈청 콜레스테롤 농도를 낮추어 심혈 관계 위험성 및 사망률을 감소시킨다. 이번 연구는 부형제, 안정화제, 붕해제, 활택제, 착색제로 사용되는 첨가제들 및 pravastatin과의 적합성 연구를 위해 진행되었다. 모든 첨가제들과의 혼합은 PTP 포장으로 포장되어 가속시험장치($40^{\circ}C/75%$ Relative Humidity)에서 3개월 동안 진행하였다. 가시적인 시험결과로는 백색의 가루 또는 밝은 갈색으로 변화는 없었다. 모든 첨가제들과 pravastatin 혼합 시 pravastatin 함량 및 순도에 있어 아주 적은 수준으로 영향을 주었으며, 그 중 pravastatin의 lactone 함량의 변화가 조금 있는 첨가제로는 microcrystalline cellulose 및 croscamellose sodium이었다. 초기의 pravastatin의 lactone 함량과 비교 시 약 0.22% 및 0.18%로 증가하였고 모든 첨가제들과의 전체 혼합 시도 3개월에서 lactone 함량이 0.43%로 증가하는 것을 확인 하였다. 이번 연구 결과들은 복용편리성을 위한 pravastatin 정제 크기 감소 연구에 크게 기여 할 것으로 판단된다.

• Animal cells and systems
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• 제16권5호
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• pp.391-399
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• 2012

We cloned cDNA-encoding arginine vasotocin (AVT) from the brain of the cinnamon clownfish Amphiprion melanopus, and that was predicted to encode a protein of 153 amino acids. We examined changes in the expression of AVT mRNA in the brain and arginine vasotocin receptor (AVTR) mRNA and osmotic stress transcription factor 1 (OSTF1) mRNA in the gills of the cinnamon clownfish using quantitative real-time PCR in an osmotically changing environment (seawater (35 psu) ${\rightarrow}$ brackish water (BW, 17.5 psu) and BW with prolactin [PRL]). The expression of AVT, AVTR, and OSTF1 mRNA in the brain and gills increased after transfer to BW, and the expression was repressed by PRL treatment. AVT-immunoreactive cells were almost consistently observed in the telencephalon. The plasma $Na^+$ and $Cl^-$ levels decreased in BW, but the level of this parameter increased in BW with PRL treatme during salinity change. These results suggest that AVT, AVTR, and OSTF1 play important roles in hormonal regulation in osmoregulation organs, and that PRL improves the hyperosmoregulatory ability of cinnamon clownfish in BW environment.

• Ecology and Resilient Infrastructure
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• 제4권1호
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• pp.3-11
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• 2017

본 논문은 연구대상 하천인 내성천에서 2013년 3월부터 본격적으로 영주댐이 담수되던 2016년 7월 중순까지 주요 관심 지점에 대한 각종 수문자료와 지형 측량 그리고 사진 모니터링 자료를 이용하여 사주에 형성된 식생의 변화를 분석하였다. 각 시기별 홍수사상이 사주에 형성된 식생의 매립 또는 제거에 어떤 영향을 주었는지 수위-단면 비교 그래프와 사진 모니터링 자료를 통해 알 수 있었다. 그 결과 모니터링 기간내 식생이 활착된 사주 위를 흐르던 홍수흐름이 식생의 매립 또는 제거에 기여한 결과를 판단할 수 있었으며 특히 2015년은 식생이 형성된 사주 위를 홍수흐름이 지나가지 않고 적절한 지하수위로 인해 수분 공급으로 식생이 번성한 것도 알 수 있었다. 영주댐의 담수가 시작되어 인위적인 조절이 되기 시작하면서 자연적인 흐름이 발생하던 시기와는 다른 양상이 발생할 것으로 예상된다. 본 연구는 향후 담수로 인한 조절 상황과 비교하는데 중요한 분석 자료로 판단된다.

• 동의생리병리학회지
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• 제27권4호
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• pp.409-415
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• 2013

We attempted to determine the action target of Shiitake mushroom extract with a known anti-hyperlipidemic effect in poloxamer(P) 407-induced hyperlipidemia model. We investigated the anti-hyperlipidemic effects of the water extract from Shiitake mushroom on the progress of high fat diet for 4 weeks. Experimental rats were divided into 5 different experimental groups including an normal group (normal diet; n=10), control group (hyperlipidemia; n=10), Experimental group I (hyperlipidemic rats treated with Shiitake mushroom extract (100 mg/kg, PO), n=10), Experimental group II (hyperlipidemic rats treated with Shiitake mushroom extract (300 mg/kg, PO), n=10), and Experimental group III (hyperlipidemic rats treated with Shiitake mushroom extract (500 mg/kg, PO), n=10). It is to analysis changes in body weight, visceral fat weight, blood lipid profiles, HMG-CoA reductase and histological findings. Body weight and epididymal fat weight was not significantly change in experimental groups (p>0.05). The level of total cholesterol, TG, arthrogenic index, and HMG-CoA reductase were significantly lower in experimental groups than control group (p<0.05). These results suggested that the Shiitake mushroom extract administration may act by inhibitory the release of cholesterol related factors and HMG-CoA from the hepatocyte without liver and kidney cell damage in hyperlipidemia rats.

• 한국환경복원기술학회지
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• 제9권2호
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• pp.1-15
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• 2006

As the imports of foreign agricultural products are liberalized and the consumption of agricultural products declines, abandoned rice paddy fields continues to rise. However, such abandoned rice paddy fields has not been precisely surveyed yet. In this backdrop, a necessity to develop technology to utilize such abandoned rice paddy fields has emerged. Utilization of abandoned rice paddy fields as wetlands may be a good example. This study aimed to survey the current status and characteristics of wetlands created within abandoned rice paddy fields by selecting abandoned rice paddy fields throughout the nation and conducting field surveys on the sites that had transformed into wetlands. The abandoned rice paddy fields almost transformed into wetland and the types of wetlands transformed from abandoned rice paddy fields were mainly Inland/Moutain/Depression/Abandoned rice paddy fields/Marsh/Phragmites communis community and Inland/Moutain/Depression/Abandoned rice paddy fields/Swamp/Salix koreensis community. Abandoned rice paddy fields that had transformed into wetlands was depending heavily on waterways for water supply than other reservoirs and lakes do. Abandoned rice paddy fields transformed into wetlands was most observed in mountainous area. Abandoned rice paddy fields are because agricultural land is no longer profitable due to international and social changes and is not cultivated as government policy. Wetland period and dimension originated from abandoned rice paddy fields are very various and its surrounding land its mostly forest and the next largest follow roads and rural community. The abandoned rice paddy fields transformed into wetlands is mostly deserted currently. Despite their value as wetlands, no restoration and utilization efforts are made in Korea today. Therefore, it is imperative to conduct a precise current status survey on these areas and introduce management and restoration plans at the government level in the case of important habitats.

• 한국환경과학회지
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• 제29권8호
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• pp.819-826
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• 2020

Production of Bacterial Cellulose (BC) by Gluconacetobacter sp. A5 was studied in shaken culture using different cost-effective carbon sources and its structural and mechanical properties were evaluated. Glycerol showed the highest level (7.26 g/l) of BC production, which was about three times higher than the yield in glucose medium. BC production depended not only on the decrease in pH, but also on the ability of Gluconacetobacter sp. A5 to synthesize glucose from different carbon sources and then polymerize it into BC. All BC produced from different carbon sources exhibited a three-dimensional reticulated structure consisting of ultrafine cellulose fibriles. Carbon sources did not significantly change the microfibrile structure of the resulting BC. BC produced from glucose medium had the lowest water-holding capacity, while BC from molasses medium had the highest. XRD data revealed that all BC were cellulose type I, the same as typical native cellulose. The crystalline strength of BC produced in glucose medium was the highest, and that in molasses medium was the lowest. Our results suggest that glycerol could be a potential low-cost substrate for BC production, leading to the reduction in the production cost, and also to produce BC with different mechanical properties by selecting appropriate carbon source.

• 한국환경교육학회지:환경교육
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• 제17권2호
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• pp.94-105
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• 2004

The purpose of this study is to understand what kind of effects a local residents’ participation on a local environmental problem has on the Environmental consciousness of the resident, and on the local community. I (researcher) employed qualitative research methods on the residents' environmental movement, which claimed to preserve the Sung Mi Mountain from the Seoul City Hall's plan of the water reservoir construction. I tried to understand the participation motivation and participating actions, and also the changes and effects the participation brought at both a personal, and community level. The data were gathered by means of in-depth interview with the local residents and unstructured questionnaire. At first, through the residents' environmental movement, the participants acquired a growth in environmental consciousness. For example, they obtained better understanding of the environment, change of attitude to environment, and participation function. Secondly, it is meaningful that a local tie intervened by the environment, enforced self-governing, and shows how community sentiment plays an important role for local community organization. Moreover, the environmental movement contributed to developing a ‘culture for participation’. In conclusion, participating in a local environmental problem can be an integration of learning and practice and also leads to reflective thinking about the relationship not only between human beings and nature, but also among human beings. In addition, it can buildup a systemic cooperation for local problem-solving and the ability to make an alternative culture in the community. These are the significances of the local environmental problem-participation on the environmental education.

• 대한토목학회논문집
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• 제12권1호
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• pp.141-150
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• 1992

급격한 도시화로 인해 기존의 배수체계에 의한 내수배제에 문제가 발생하게 되고, 이에 따른 홍수 발생시의 내수침수 피해가 도시지역 홍수의 새로운 문제로 대두되고 있는 실정이다. 본 연구에서는 기존의 배수체계 중 유수지 및 우수배제 펌프장의 안전도를 검토하였다. 펌프조작에 있어서는 증수부와 감수부에 따라 우수배제 펌프를 조작하는 기준이 기존 펌프보유대수로도 홍수대처능력을 현재보다 월동하게 증가시킬 수 있음을 수치적으로 확인하였다. 또한 유수지내 유입량과 펌프조작에 대한 민감도 분석을 실시하여 펌프 한대가 담당하는 적정 유입량의 범위를 검토하였다. 연구결과 서울특별시 관내 57개소의 유수지 및 우수배제 펌프장중 10년 빈도의 설계호우에 대해서도 60% 정도만이 안전한 것으로 나타나 이에 대한 근본적 대책이 시급한 것으로 판명되었다.