• Journal of fish pathology
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• v.20 no.2
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• pp.189-200
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• 2007

To investigate the innate immune response involved in early stage of anti-viral defence, carps were injected with UV-inactivated spring viraemia of carp virus (SVCV), poly inosinic:cytidylic acid (Poly I:C) and concanavalin A (Con A), respectively and examined lysozyme activity, serum complement activity and chemiluminescent (CL) response of leucocytes isolated from head kidney at 3 days post-injection. There was no significant difference in plasma lysozyme activities among all experimental groups. However, lysozyme activities of head kidney in the groups injected with antiviral activity inducers were significantly higher than those of the control injected with physiological saline. Bactericidal activities of serum of the groups injected with antiviral activity inducers were not significantly different from control group. However, the CL responses were significantly higher at lower dose of Poly I:C and Con A, whilst dose-dependent increase was shown in UV-inactivated SVCV-injected group. In the challenge test with 1×104 TCID50/fish of SVCV at 4 days post-injection, UV-inactivated SVCV- and Poly I:C-injected groups showed higher relative percent survival (RPS) than Con A-injected group. Furthermore, strong protection was observed in the group injected higher dose of Poly I:C although showed lower activities in lysozyme and CL response. These results suggested that Poly I:C might stimulate other factors belonging to non-specific immune system have induced protective immunity against the SVCV challenged.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.10a
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• pp.70-70
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• 2011

본 논문에서는 에너지 절감형 선박평형수 처리장치를 개발하기 위하여 $TiO_2$ 광촉매와 자외선 램프를 적용한 선박평형수 처리장치에 대하여 기술하였다. 제작된 처리장치의 정격 출력과 처리용량은 각각 2.16 kW 및 $100m^3/h$이다. 처리장치의 살균효율은 플랑크톤을 사용하여 IMO 규정에 따라 평가하였다. 실험결과로부터 시제작 선박평형수 처리장치의 살균효율은 동물성 플랑크톤에서 99.7 %, 식물성 플랑크톤에서 98.84 %로 나타났다.

• Environmental Mutagens and Carcinogens
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• v.9 no.2
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• pp.97-109
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• 1989

살균제 Captan, 살충제 Diazinon, MEP, Malathion 및 EPN 의 단독 처리 그리고 Captan 반복처리와 이들 살충제와 서로 다른 조합으로의 동시적, 시간적 복합처리가 E. coli WP2S(uvrA-, trp-) 균주의 돌연변이유발 빈도 및 생잔율에 미치는 영향을 검토하여 다음과 같은 결과를 얻었다. 1. Captan, Diazinon, MEP, Malathion, EPN 및 UV 의 동시적 복합처리는 이들 농약의 단독 처리에서 보다 E. coli WP2S (uvrA-, trp-)균주의 돌연변이유발빈도가 높았고 이들 농약의 단독처리효과를 합한 가산적 영향으로 나타났으며, 동일조건하에서 이들 농약의 처리농도를 배로 늘렸을 때는 배가효과를 보였으나 이 균주의 증가된 돌연변이 유발빈도는 cinnamaldehyde 30ng 및 60ng/ml 그리고 tannic acid 50ng/ml 배지로 각각 첨가했을 때 감소되었고 생잔율은 증가되었다.

• Korean Journal of Microbiology
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• v.27 no.3
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• pp.291-296
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• 1989

Campylobacter jejuni was studied for its disinfection by heat-and cold-treatment and UV-irradiation. When C. jejuni was treated by heat, no viable cell was found after 10 min treatment at $55^{\circ}C$, whereas small fraction of cell population was survived after 60 min treatment at $45^{\circ}C$ and $50^{\circ}C$. When they were treated by cold temperature for 30 days, no cell was survived at -$23^{\circ}C$ but about 4 log of the cells were survived at both temperature of $4^{\circ}C$ and -$40^{\circ}C$. When the organisms were UV-irradiated, thier survival rates were proportionally varied to the distance of irradiation. The scanning electron microscopic studies of C. jejuni cells treated by the disinfecting agents revealed that shapes of thecells were deformed from spiral rod into spherical form. The heat-treated cells showed rough and damaged surface on the scanning electron micrographs. In the heat-treated cells, some proteins of high molecular weight appeared to become accumulated in the electrophoretic analysis. The DNAs extracted from the cells treated with the physical agents showed some differences in agarose gel electrophoresis, comparing those of normal cells.

• Journal of the Korean Society for Precision Engineering
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• v.29 no.9
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• pp.931-937
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• 2012

In this study, we assessed environmental impacts of compound humidifiers using environmental life cycle assessment and presented the ways to improvements in energy consumption of them. We found eco-design parameters and $CO_2$-eq emissions in each stage of raw material acquisition, manufacturing, transportation, use and disuse in life cycle of the compound humidifiers. The highest $CO_2$ emission is found to be in the stage of use among all stages of life cycle, which is mainly due to power consumption in thermal heating of heating coil for sterilization during humidification. The power consumption and $CO_2$ emission in the stage of use can be reduced to 1/4 and 1/3 at the highest estimate through improvement of sterilization method, respectively. We suggested the replacement of conventional thermal heating coil by ultra violet light-emitting diodes (UV-LED) for sterilization and then presented the experimental results on the sterilization effects of UV-LEDs.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.30-30
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• 2011

산업화 과정에 방출된 할로겐 화합물 및 프레온 가스가 오존층을 파괴하면서 많은 양의 자외선이 지표에 도달하여 생태계에 적지 않은 영향을 끼치고 있다. 자외선은 살균, 소독작용 및 Vitamin D 합성을 위해 생명체에 필수적이지만 과다할 경우 색소침착, 피부노화, 피부암 발생, 백내장의 증가, 면역기능저하 등의 피해를 준다. 자외선은 파장 영역에 따라 UV-A(장파장 자외선), UV-B(중파장 자외선)및 UV-C(단파장 자외선)으로 나뉜다. 이 중 인체에 가장 유해한 것으로 알려진 단파장의 UV-C는 파장이 짧아 침투력이 미약해 오존층과 성층권에서 대부분 흡수되므로 생물학적으로 큰 의미는 없다. 그러나 자외선 중 UV-B와 UV-A 영역의 자외선은 인체에 영향을 가장 많이 미치므로 이들 영역의 자외선을 차단하는 것이 필요하다. Vitamin C는 아스코르브산(ascorbic acid)이라고도 불리며 미백효과, 주름 개선, 자외선 차단 및 항산화 작용을 하지만 섬유가공 시 Vitamin C는 쉽게 산화되며 세탁 내구성이 떨어지기 때문에 가교제를 필요로 한다. Vitamin C를 이용하여 자외선 차단성 섬유제품을 개발하기 위해, 포름알데히드를 유리하지 않는 폴리카르복시산 가교제 중 하나인 Citric Acid(CA)를 사용하여 고온에서 면직물에 처리했을 때 에스테르 형 가교를 형성하여 내세탁성을 가질 수 있었다. 자외선 차단 효과를 알아보기 위하여 KS K 0850 섬유제품의 자외선 차단율 및 차단지수 시험방법으로 평가하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.4
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• pp.2602-2608
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• 2015

The aim of this research was microbiological hazard analysis which is required to application of HACCP(Hazard Analysis Critical Control Point) system to chili powder. A processing had been conducted in Yong-Geum Agricultural Production located in Dongnyang-myeon, Chungju-si between January 10, 2014 to June 13, 2014. A manufacturing process chart was prepared by entire level of processing. A changes of microorganism was tested by changing sterilization time in ultraviolet ray sterilization processing which can control microbiological Hazard. As a result, critical Limits is decided as ultraviolet rays lamp $20W{\times}12EA$, sterilization $63{\pm}3$ min of each. The result of the microorganism test after ultraviolet ray sterilization was safe. On the other hand, a microorganism test of manufacturing environment and workers suggested that the microbiological hazard should be reduced through systematic cleaning and disinfection accompanied by personal hygiene based on hygiene education on workers.

• Electronics and Telecommunications Trends
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• v.30 no.6
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• pp.42-49
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• 2015

질화물 반도체 기반 가시광 청색 Light Emitting Diode(LED) 기술은 디스플레이의 Back Light Unit(BLU)뿐 아니라 일반 조명에 활용되며 우리 실생활에서 매우 밀접하게 사용하고 있다. 가시광보다 짧은 파장을 가지는 자외선 LED의 경우 경화기 및 위폐감지기에 기존의 유해 가스를 사용하는 자외선 램프를 대체하고 있다. 자외선 광원의 또 다른 거대 시장으로 살균 및 정화, 의료 및 바이오 응용 시장에서 자외선 램프를 대체할 수 있는 자외선 LED 기술이 활발히 발전하고 있다. 본고에서는 이들 자외선광원 시장동향과 국내외 자외선 LED의 기술동향을 파악하므로 앞으로 연구개발의 방향을 모색하고자 한다.

• Safe Food
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• v.7 no.2
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• pp.26-34
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• 2012

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.445-446
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• 2000

Disinfection of pathogenic protozoa Giardia has been done by using $TiO_2$ prepared by hydrothermal process. $TiO_2$ suspended in a photoreactor or immobilized on the optical-fiber surface immersed in a photoreactor has been applied with the ultraviolet light. It has been shown that disinfection effect with $TiO_2/UV$ system 2 times as that with only the UV light and disinfection capability of Giardia increased with an increased $TiO_2$ concentration up to 0.1g/L in a $suspended-TiO_2$ reactor.