• 생약학회지
• /
• 제29권3호
• /
• pp.237-242
• /
• 1998

We have tested tyrosinase inhibitory activity on the methanol extracts of 23 species marine algae and 23 species traditional medicinal plant. Among them, four medicinal plants, Ephedra sinica, Atractylodes japonica, Pinnelia ternata, and Citrus aurantium, showed strong inhibition potency over 90% at concentration of 0.33 mg/mL. Also, two marine algae, Enteromorpha compressa and Sargassum singgildianum showed mild inhibition potency over 50% at concentration of 0.33 mg/mL.

• Journal of Advanced Marine Engineering and Technology
• /
• 제20권3호
• /
• pp.29-43
• /
• 1996

In this paper the recent studies of digital governor for the Diesel Engine in Korea is summarized and that of usage in the marine and land field as of power plant is analyzed for the interest and development of the enterprise with relation with relation to this industrial part. Our investigation shows that until now the studies on the digitl governor are mainly carried out in KMU and land usage for the power plants is increased gradually because reliance of digital governor is improved and system for the maneuvering and monitoring the plants is computerized.

• 한국어병학회지
• /
• 제22권3호
• /
• pp.317-326
• /
• 2009

This study has shown the screening of anti-bacterial activity of three Indian medicinal plant choloroform : methanol (50:50) solvent leaf extracts (i.e. Azadirachta indica, Ocimum sanctum, and Curcuma longa) with different concentrations (10, 5, 2.5, 1.25, 0.625, 0.312, and 0.156 mg/ml) under in vitro conditions against fish pathogenic bacteria, Aeromonas hydrophila, Streptococcus iniae, Vibrio harveyi, V. anguillarum, and Edwardsiella tarda isolated from olive flounder farms, Jeju Island, South Korea. The anti-microbial activity of the A. indica and O. sanctum extracts yielded the zones of growth inhibition (ZI) was 3 and 1mm against A. hydrophila at concentration of 0.156 mg/ml when compared to that of tetracycline standard (3 mm). At highest concentration (10 mg/ml) of A. indica, O. sanctum, and C. longa, high inhibition was 9, 7, and 6 mm when compared to that of tetracycline (11 mm) against A. hydrophila. The minimum inhibitory concentration (MIC) of A. indica, O. sanctum, and C. longa at 0.156 mg/ml that yield 9, 10, and 13 CFU/ml for A. hydrophila, 16, 22, and 25 CFU/ml for S. iniae and 18, 22, and 23 CFU/ml for E. tarda compared to the tetracycline. At highest concentration (10 mg/ml) of the three extracts was better inhibiting the growth of A. hydrophila, S. iniae and E. tarda. A. indica, O. sanctum, and C. longa were determined to the potential antioxidant activityon the basis of their scavenging activity of the stable 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical. A. indica extract was 0.625 mg/ml which indicated that the strong anti-oxidant activity. However, O. sanctum and C. longa extracts showed weak anti-oxidant activity at this concentration. Hence, in vitro assay among the pathogens, A. hydropila is better inhibitory activity of the extracts. It is evident that the Indian medicinal plants extracts were subjected to its effectiveness against A. hydrophila, S. iniae, and E.tarda at low concentrations. The obtained results in the present study suggested that the Indian plant extracts is a prevention tools for Korean olive flounder aquaculture pathogens and its need further advance investigation.

• Journal of Advanced Marine Engineering and Technology
• /
• 제19권4호
• /
• pp.7-16
• /
• 1995

This article describes the working prnciple, structure and main characteristics of vacuum coolers for vegetables, and gives concrete examples of vacuum coolers that srebeing put to practical use. In particular, newly-developed cavuum coolers with cold storage, utilizing night-time electricity, are focused upon. Processing plants for vegetables, cold-storage rooms and vacuum cooling devices were investigated as possible application of vacuum cooling technology.

• 한국마린엔지니어링학회:학술대회논문집
• /
• 한국마린엔지니어링학회 2012년도 전기공동학술대회 논문집
• /
• pp.273-273
• /
• 2012

• 해양환경안전학회지
• /
• 제23권5호
• /
• pp.585-594
• /
• 2017

군사용으로 먼저 개발되어 온 드론은 요소기술의 급격한 발전을 통해 민간 분야로 확대되면서 최근 다양한 산업분야에 활용되고 있다. 이러한 시대적 흐름에 따라, 조선해양 산업계에서도 유지보수 및 점검용으로 드론의 활용이 유럽을 중심으로 본격화되고 있다. 이와 관련하여, 본 논문에서는 조선해양 분야에 적합한 드론의 기술개발을 위해 선박 및 해양플랜트의 유지보수 점검의 현상태를 진단함으로써 드론 기술개발의 방향성을 제시한다. 즉, 조선해양용 드론이 이미 상용화 된 선진국의 기술력을 살펴보고, 조선해양 산업계에서 드론시대를 대비하여 해결해야 할 기술적 과제들을 소개한다. 또한, 이러한 드론의 시장성장 가능성을 전망함으로써 기술개발의 추진력을 제공하고자 한다.

• 수산해양교육연구
• /
• 제27권4호
• /
• pp.938-947
• /
• 2015

As many offshore plants are built domestically, many workers get various jobs in the offshore plants directly or indirectly. But workers(including seaman and non-seaman) still have hard time to getting the job in offshore plants because they still rely on personal contacts and limitation of adaptable positions. Now people who want to work at offshore plants have to get safety training under the regulation and request of IMO/STCW and OPITO. Recently OPITO reinforced offshore safety training and discussed the mutual agreement between IMO/STCW and OPITO. Therefore this study searched legal standards for offshore plant work and the trend of offshore safety training. Base on a survey among domestic delegates who completed BOSIET course from 2010, we now understand the actual situations in finding an effective way on how to advance domestic workers in the offshore plant industry.

• KSBB Journal
• /
• 제24권6호
• /
• pp.521-526
• /
• 2009

지질은 생체내에서 여러 가지 중요한 기능을 한다. 하지만 부적절한 식이 섭취로 인한 지방산의 불균형은 성인병을 비롯한 여러 질병의 원인이 된다. 이러한 이유로 지방산에 대한 관심이 높아지고 있으며 특히 어류나 해조류에 다량 포함되어 있는 n-3계 다중불포화지방산과 질병과의 관련성이 밝혀지고 있다. 따라서 본 연구에서는 염생식물이 n-3계 다중불포화지방산을 함유할 가능성을 확인하기 위하여 26종의 염생식물에 대하여 지방산의 조성과 함량을 조사하였다. 용매 추출된 염생식물 시료는 gas chromatography를 이용하여 분석이 이루어졌으며, 그 결과, 퉁퉁마디, 수송나물, 염주괴불주머니, 사철쑥, 갯질경 등이 높은 총지방산 함량을 나타냈다. 또한 포화지방산인 palmitic acid (16:0)는 실험 대상 전체에서 나타났을 뿐만 아니라 그 %함량도 대부분의 염생식물에서 가장 높은 것으로 확인되었다. 불포화지방산의 경우, 단일불포화지방산에서는 oleic acid (18:1)가 그리고 n-6계 다중불포화지방산에서는 linoleic acid (18:2)가 높은 %함량을 보였다. 그리고 n-3계 다중불포화지방산 중에서 천일사초가 26.40%로 LNA의 함량이 가장 높았으며, 뒤이어 모래지치, 수송나물, 갯메꽃 순으로 나타났다. EPA의 함량은 상대적으로 낮은 비중으로 나타났으나 칠면초가 1.89%로 가장 높은 수치를 보였다. DHA는 여러 대상 식물에서 비교적 높은 함량을 보였으며 특히 흰명주아뀌가 14.54%로 높은 함량을 보였다. 이러한 결과는 염생식물이 해조류나 어류의 n-3계 다중불포화지방산의 함량에 있어서 뒤지지 않음을 보여줄 뿐만 아니라 천연물 화학적이나 식품학적 추가 연구를 통해 여러 질병의 예방과 치료분야에도 기여할 것으로 사료된다.

• 수산해양기술연구
• /
• 제34권2호
• /
• pp.223-230
• /
• 1998

Recently, with the rapid development in the industries such as mechanical plants, automobiles, ships and marine structures, it is enlarged by the use of the SS 41 steel. This mechanical plants and marine structures are exposed m corrosion because of Cl-under marine environments. To protect their accidents, mainly applied anti-corrosion epoxy coating and various protective its structures. In this study, corrosion control characteristics on the epoxy coating were investigated by the galvanic corrosion of impressed voltage tester under marine environments The main results obtained are as follows; 1. Corrosion current density of amine-epoxy coating becomes more increased than that of other epoxy coating and the time area rate of pin hole and pit until 5% becomes most rapid. 2. The potential of SUS 304 stainless steel(cathode) for Al-epoxy coating is nearly zero potential. 3. Corrosion current density of Amine-epoxy by shot blast becomes more decreased than that of not shot blast and cathodic potential becomes more noble. 4. As distance of anode and cathode is more decreased, corrosion current density of epoxy coating is more increased and cathodic potential becomes less noble.

• 한국식품영양과학회:학술대회논문집
• /
• 한국식품영양과학회 2004년도 Annual Meeting and International Symposium
• /
• pp.138-139
• /
• 2004