• 수산해양기술연구
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• 제47권4호
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• pp.316-326
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• 2011

In this study, the entrapped number is investigated on the UV light with different illuminance to fluorescent bait cage for swimming crab in order to find the appropriate illuminance which has the best attraction effect of fluorescent bait cage for pots. In addition, preference to the light, arrival time and residence time at light area are compared and analyzed to fluorescent bait cage and non-fluorescent bait cage for American lobster at the UV light and ordinary light according to the illuminance condition. Pot with red non-fluorescent bait cage at the no lighting (<0.01lux), pot with blue fluorescent bait cage at the 20W UV lighting (0.16lux) and pot with blue fluorescent bait cage at the 30W UV lighting (0.22lux) were soaked for 6 hours and the entrapped number of swimming crab was examined. The mean entrapped number of swimming crab in pot with red non-fluorescent bait cage at the no lighting (<0.01lux) was 1.0, but the mean entrapped number of swimming crab in pot with blue fluorescent bait cages at the 20W UV lighting (0.16lux) and 30W UV lighting (0.22lux) were 1.4 and 0.4, respectively (P<0.05). The rate of preference to the blue fluorescent bait cage at the UV lighting shows 1.6-4.8 times higher than that of preference to the red non-fluorescent bait cage at the ordinary lighting. In addition, The rate of preference to the blue fluorescent bait cage at the UV lighting is higher when the illuminance of ordinary light is same as or is lower than that of UV light (P<0.05). However, the preference to the light depending on gender shows no significant difference (P>0.05). The arrival time to UV light area of lobster is shown as 1.2-2.4 times faster than that to ordinary light area. Generally, it is shown that arrival time to UV light area is faster than the arrival time to ordinary light area when the illuminance of ordinary light is the same as or lower than that of UV light (P<0.05). However, arrival time to the light area depending on gender shows no significant difference (P>0.05). The residence time at UV light area of lobster is 1.2-1.7 times longer than that at ordinary light area. The residence time depending on different illuminance of ordinary light and genders showed no significant difference (P>0.05).

• 동아시아식생활학회지
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• 제15권2호
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• pp.207-212
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• 2005

To determine changes of chlorophyll and potato glycoalkaloid(PGA) contents in potato tubers after lightening, Dejima potatoes cultivated in Korea were used and PGA was analyzed by HPLC. Potatoes were stored under fluorescent and UV light exposure or darkness for 7 days at $5^{\circ}C$. The contents of chlorophyll and glycoalkaloid in the peel of potatoes exposed to fluorescent light were increased to $84\%,\;69.5\%$ respectively compared to potatoes stored without lightening. While a marked effect of lightening on the peel of potatoes exposed to fluorescent light, UV light lead to no change of chlorophyll and less increase in glycoalkaloid than fluorescent did. The increase of chlorophyll was provoked by only fluorescent light. Cortex part did not accumulate any chlorophyll or glycoalkaloid.

• 한국의류학회지
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• 제23권6호
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• pp.909-918
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• 1999

The indigo-dyed blue denim garments are favored not only by young people but also by almost everyone of life, In the early years they were casually worn on most occasions but became universal recently. Such denim garments are treated with various process to give it optimal softness and color contrast of blue and white. The processess can generate photoyellowing and thus the yellowing may damage their appearance and quality. So this study is to find the solutions to reduce the photoyellowing problem. For this prupose sample denim were treated with cellulase fluorescent brightener UV absorbent etc. The results were as follows; The yellowing would be more accelerated by fluorescent brightening. Since the yellowing was reduced by 90% In particular the application of the UV absorbent before using of the fluorescent brightener was most effective. The optimal concentration was 0.5% (o.w.f) and the benzophenone compounds were found most effective for the indigo denim. And reduction effect of yellowing by UV absorbent was lowered with repeated laundering but metal compound treatment on fabric made a removal of UV absorbent by laundering prevented.

• 한국농공학회지
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• 제45권3호
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• pp.84-93
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• 2003

Photoreactivation of microorganism following UV-disinfection is one of the research topics of interest in assessing the UV-disinfection performance. Apparent photoreactivation was examined under fluorescent lamp and solar radiation as well as in darkness. Total coliform, fecal coliform, and Escherichia coli were used as indicator microorganisms, and their concentration was monitored with time after UV-disinfection. Under the darkness, their initial concentration of 10∼30 MPN/100 mL increased to the level of 100 MPN/100 mL after 24 hours, which implied that part of damaged microorganisms by UV-disinfection might be repairable with time. Under the fluorescent lamp, photoreactivation was more apparent that their concentration increased up to 1,000 MPN/100 mL which might significantly impair the water uses specially in reuse of reclaimed wastewater. However, their concentration further decreased down to below 2 MPN/100 mL under the solar radiation primarily due to additional disinfection by solar radiation rather than photoreactivation. Samples not disinfected by UV-disinfection also demonstrated substantial decrease of their concentration under solar radiation from about 5,000 MPN/100 mL to less than 30 MPN/100 mL in 24 hours. But direct reuse of effluent without disinfection is not recommended because natural decay by solar radiation may take time and be affected by climatic conditions. The result suggests that photoreactivation of pathogenic microorganisms may not be concerned in agricultural reuse of reclaimed wastewater because solar radiation may provide further disinfection after UV-disinfection.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.703-706
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• 2009

The external electrode fluorescent lamp(EEFL) has recently been applied to backlight of LCD TV as a new light source. The dependence of the electro-optic characteristics of the EEFL used in direct-lit backlights on the glass thickness was examined in detail, and the ultraviolet(UV)-light efficiency was estimated. It was found that the lamp efficiency became larger as the glass thickness decreased if other conditions were the same.

• 수산해양기술연구
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• 제44권3호
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• pp.174-183
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• 2008

In order to develop the substitutive materials for natural baits of swimming crab pots, the fluorescent characteristics of the baits were analyzed, and the preference of fluorescent dyes were investigated by the mean entrapped catch number to the pots through the water tank experiments and fishing experiments. On the investigation of fluorescent characteristics by the 5 kinds of baits, mackerel, krill, manila clam, pig's fat and chicken's head which were used in substitutive baits for test in the UV long wave(365nm) area, it showed clear blue fluorescence in the skin of mackerel, shell of krill, manila clam and bill of chicken's head, and green fluorescence in the mackerel s muscle and internals, and yellow fluorescence in the pig's fat and chicken's head. On the investigation of fluorescent characteristics by the bait cages in the UV short wave(254nm) and long wave(365nm) area, it showed each green, red and blue fluorescence in the cylinderical or hexahedral red plastic bait cages which were painted each green, red and blue fluorescence dyes, but it showed yellowish green flourescence in the cylinderical or hexahedral red plastic bait cage which was painted yellow fluorescent dye. On the preference investigation of the fluorescent dyes of swimming crabs by the 5 kinds of the bait cages which were put the mackerel in the non-fluorescent red plastic cage($RF_N$), red, yellow, green and blue fluorescent plastic cages(RF, YF, GF, BF) each, nonfluorescent red plastic cage($RF_N$) was entrapped mean 2.0(6.7%), but blue fluorescent plastic cage(BF) was mean 5.0(16.7%) and it was more 2.5 times comparing to $RF_N$, and red fluorescent cage(RF) was same level and green fluorescent cage(GF) was 50% of catch number comparing to $RF_N$, and yellow fluorescent cage(YF) was entrapped nothing(F 46.324, P < 0.05). On the investigation of the entrapped catch number to the pots which were put the mackerel in the blue fluorescent hexahedral plastic cage(HP) and blue fluorescent silicon mackerel model cage(SM), HP was mean 3.4(11.3%) and it was a little more comparing to SM which was entrapped mean 3.2(10.7%)(t 0.775, P > 0.05). Fishing experiments on the preference investigation of swimming crabs by the pots which were put in the non-fluorescent red plastic cage($RF_N$) and blue fluorescent plastic cage(BF) were conducted 3 times. Mean catching number and weight of $RF_N$ were 71.7 ind.(18.3%) and 16.9kg(64.3%), and those of BF were 93.0 ind.(23.1%) and 19.8kg(64.5%), respectively.

• 원예과학기술지
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• 제35권2호
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• pp.178-187
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• 2017

인공 광원에 따른 rocketsalad(Eruca sativa L.) 내 GSL 함량을 조사하였다. 실험에 사용한 광원의 종류는 자연광(Control-1 또는 2), Red LED, Blue LED, Mix(R+B) LED(Red LED+Blue LED), White LED, Fluorescent Lamp(FL), Fluorescent Lamp+UV-C(FL+UV-C). 실험은 식물 생장기 대수 제한 때문에 [실험 I;Control-1, Red LED, Blue LED, Mix(R+B) LED]과 [실험 II;Control-2, White LED, FL, FL+UV-C]로 구분하여 수행하였다. 그 결과, Red LED와 FL에서 rocket salad의 잎의 길이의 증가율이 가장 높았다. 그러므로 Red LED와 FL이 rocketsalad의 성장과 관계가 있음을 확인했다. Rocketsalad로부터 총 7종류의 GSLs(glucoraphanin, diglucothiobeinin, glucoerucin, glucobrassicin, dimeric 4-mercaptobutyl GSL, 4-methoxy glucobrassicin, gluconasturtiin)를 분리 및 동정하였다. [실험 I]에서 총 GSL 함량은 Red LED(4.30)에서 가장 높고 Blue LED($0.17{\mu}mol{\cdot}g^{-1}\;DW$)에서 가장 낮았다. [실험 II]에서 총 GSL 함량은 FL(13.45)에서 가장 높고 FL+UV-C($0.39{\mu}mol{\cdot}g^{-1}\;DW$)에서 가장 낮았다. 특히 Rocket salad의 강한 향과 매운 맛을 돋아주는 dimeric 4-mercaptobutyl 함량은 [실험 II]에서 Control-2에 비해 FL과 White LED가 각각 14.9, 3.2배 증가했다. 따라서 Red LED, White LED, FL은 rocket salad의 GSL 축적에 영향을 주었다고 판단된다.

• 분석과학
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• 제7권1호
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• pp.17-23
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• 1994

졸-겔법에 의해 dye host로 사용될 수 있는 무기/유기 복합체(ORMOSIL)를 제조하였으며, 이 복합체가 dye host로 적합한 조건을 갖췄음을 UV/VIS Spectrophotometer를 이용하여 90% 정도의 투광성을 얻음으로써 알 수 있었다. 이 투광성은 졸-겔 공정 중 촉매로 쓰이는 염산의 양이 적고 묵힘시간이 짧을수록 커짐을 알 수 있었다. 또한 이렇게 제조된 Host에 Rhodamine 6G Perchlorate를 도핑하여 유기염료의 형광 및 투광성을 측정한 결과 겔화온도가 증가될수록 형광 강도가 증가하며 투광성은 감소하는 것을 관찰할 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제35권1호
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• pp.35-38
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• 2014

Herein, we report on the preparation of red fluorescent Si nanoparticles stabilized with styrene. Nano-sized Si particles emit fluorescence under UV excitation, which could be used to open up new applications in the fields of optics and semi-conductor research. Unfortunately, conventional methods for the preparation of red fluorescent Si nanoparticles suffer from the lack of a fully-established standard synthesis protocol. A common initial approach during the preparation of semi-conductors is the etching of crystalline Si wafers in a HF/ethanol/$H_2O$ bath, which provides a uniformly-etched surface of nanopores amenable for further nano-sized modifications via tuning of various parameters. Subsequent sonication of the etched surface crumbles the pores on the wafer, resulting in the dispersion of particles into the solution. In this study, we use styrene to occupy these platforms to stabilize the surface. We determine that the liberated silicon particles in ethanol solution interact with styrene, resulting in the substitution of Si-H bonds with those of Si-C as determined via UV photo-catalysis. The synthesized styrene-coated Si nanoparticles exhibit a stable, bright, red fluorescence under excitation with a 365 nm UV light, and yield approximately 100 mg per wafer with a synthesis time of 2 h. We believe this protocol could be further expanded as a cost-effective and high-throughput standard method in the preparation of red fluorescent Si nanoparticles.

• 공업화학
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• 제29권3호
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• pp.303-306
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• 2018

DMT 생산과정의 부산물로서 폐기 처리되어 왔던 methyl 4-formylbenzoate (MFB)를 출발 물질로 하여 고급 형광 증백제 family와 동일한 4,4'-di((E)-styryl)-1,1'-biphenyl 기본 골격을 갖고 aromatic ester가 도입된 새로운 형광 증백제(fluorescent whitening agent) 후보 물질 6종을 합성하였다. 후보 물질 6종은 MFB 및 그의 유도체와 tetraethyl biphenyl-4,4'-diylbis(methylene)diphosphonate와 Wittig-Horner 반응을 이용하여 합성하였다. 합성된 6종에 대하여 형광증백제로의 가능성을 확인하기 위하여 UV 스펙트럼을 기록하여 흡광 계수를 얻었으며, 6종 모두 전반적으로 기존 상용 제품(log ${\varepsilon}$ 4.85)과 유사한 몰 흡광 계수(log ${\varepsilon}$ 4.59~5.00)를 보여주고 있다. 특별히 화합물 디메톡시 페닐그룹을 갖는 16, 17은 기존 상용 제품보다 우수한 몰흡광 계수를 나타내고 있어 상용화를 위한 현장 테스트를 진행할 예정이다.