• 한국식품영양학회지
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• 제11권5호
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• pp.506-512
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• 1998

In order to replance systhetic colors by natural colors as food additive, properties of Gardenia yellow color and Gardenia blue color were compared with Food yellow No. 4 and Food blue No. 1. Color differeance between Food yellow No. 4 and Gardenia yellow color was 7.55. Thermal stability of Food yellow No. 4 was above 99%. On the other hand, in case of Gardenia yellow color, showed adove 90% of residual color units in 8$0^{\circ}C$$\times$30min and 10$0^{\circ}C$$\times$30min at pH 7.0 but 75% in 121$^{\circ}C$$\times$15min. Difference of light stability between Food yellow No. 4 and gardenia yellow color was about 18%. Addition of ascorbic acid was increased about 6% in light stability. Color difference between Food blue No. 2 and Gardenia blue color was 107. Thermal stability of Food blue No. 2 was above 99%. But Gardenia blue color showed 92% of residual color units in 8$0^{\circ}C$$\times$30min and 10$0^{\circ}C$$\times$30min at pH 7.0 but 90% in 121$^{\circ}C$$\times$15min. Difference of light stability between Food blue No. 4 and Gardenia blue color was about 8%. Addition of -tocopherol was increased about 4% in light stability of Gardenia blue color.

• ALGAE
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• 제19권1호
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• pp.7-14
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• 2004

Blue-Min was initially developed as an adsorbent for harmful gas removal and recently improved to apply to livestock, agriculture and aquaculture as an assistant feed. In the Blue-Min treatment, growth of harmful algae (Cochlodinium polykrikoides and the others causing the red-tide in the ocean) were inhibited below 10% in comparison with control and coagulation removal of harmful alge with Blue-Min treatment was more efficient than that of yellow loess treatment. It would be expected that the Ble-Min can be useful for the extirpator against the red-tide organisms and restrain the toxic algal growth around the fish aquaculture using the assistant feed. Recently, its utility has become to be diverse as it was revealed that aquaculture productivity increase by its application and, in addition, that it improve the water quality or sediment conditions in the aquaculture of Chinese White Shrimp. When Blue-Min was treated with the proper dose, the growth inhibition of Microcystis aeruginosa and lsochrysis galbana, which are typical red-tide organisms in freshwaters and food organisms in aquaculture, respectively, were less than that of marine red-tide organisms, while their growth slightly increased with low concentration treatiment. In addition, polyunsaturated fatty acids (PUFA) content of I. galbana slightly increase with the Blue-Min treatment. Through our research, the Blue-Min has diverse and comples function against various biological organisms and is proved as a biological activator or depressor.

• 미생물학회지
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• 제10권1호
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• pp.35-40
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• 1972

1) The photodecomposition rate of guanine being catalized by methylene blue ws 53.7% in contrast with 9.3% that of dark control for 180 min. 2) In guanine control, the decomposition rate was very low. For 180 min., the rate was 8.1% in illuminated sample and 3.9% in non-illuminated sample. 3) The decomposition rate of methylene blue was obviously interfered by the existence of guanine. In guanine and methylene blue mixture solution, the net decomposition rate, excluding that of dark control ws 39.2% and in dye only solution, it was 48.5%.

• 공업화학
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• 제16권3호
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• pp.366-371
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• 2005

본 연구에서는 methylene blue의 오존 산화하는 동안 BOD, COD, TOC, 흡광도 그리고 탈색 비율을 분석하였으며, 오존산화반응은 methylene blue가 충진되어 있는 원형모양의 반응기에서 수행한 결과 다음과 같은 결론을 얻었다. 탈색도는 최대파장(${\lambda}_{max}$, 660 nm)에서 흡광도를 측정하였다. 오존농도는 $50{\pm}10mg/L$를 사용하였으며 40 min 후 거의 오존산화반응이 끝났다. 그 결과로 $30^{\circ}C$에서 오존산화 반응 후 $TOC/TOC_0$ 비율은 83.8%로 나타났고, COD는 초기값보다 44.0% 감소하였다. 그리고 $BOD_5/COD$ 비율은 64.2%에서 90.8%로 오존산화 반응 후 생분해도가 증가하는 것으로 나타났다. 반응속도상수는 $3.30{\times}10^{-2}min^{-1}$로 나타났으며, 활성화 에너지는 $3.01kcal{\cdot}mol^{-1}$로 나타났다.

• Journal of Plant Biology
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• 제38권1호
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• pp.1-10
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• 1995

Photoinhibition and its recovery of spectrally adapted Anacystis nidulans were studied. Phycocyanin and Chl content and phycocyanin/Chl ratio were increased in cells grown under blue-green light compared with those grown in white light. Photosynthetic activities of white light and blue-green light grown cells were reduced by 50% after 15 min and 10 min of photoinhibitory light treatment (1.2 mmol·m-2s-1), respectively, largely due to the decline of PSII activities. However, their activities were recovered fully after 30 min incubation under weak light. Treatment of rifampicin and chloramphenicol magnified the photoinhibitory effects and suppressed the recovery with disappearance of susceptibility to photoinhibition and delayed the recovery process, indicating no significant differences in phosphorylation, dephosphorylation and protease activity between two cells. Therefore, it is suggested that the increased sensitivity of blue-green adapted cells might be attributed to the decline of protein synthesis, and phosphorylation-dephosphorylation of protein and protease activity might be involved in the recovery process.

• Fisheries and Aquatic Sciences
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• 제8권4호
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• pp.195-200
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• 2005

This study optimized the mixing ratios of seafood sauce with blue crab for maximal sensory attributes using a response surface methodology with central composite design. It evaluated sensory appeal, nutritional value, and some rheological properties. The optimal formulation appeared to be 252 g of tomato paste, 78 g of chopped garlic, and 519 g of blue crab block; this ratio resulted in a predicted sensory score of 5.7 (on a 7-point scale) for overall acceptability. Addition of blue crab block increased moisture, ash, and protein contents in various sauces, but fat contents were similar in every sauce. Major free amino acids such as glutamic acid, phospho serine, asparagine, and arginine composed about $60\%$ of the total amino acid content. Standard and optimized sauces were red and light yellow, and those color values were significantly higher than in American-style sauces. Optimal viscosity was half the value of American-style sauces; more blue crab block added to the sauce resulted in lower viscosity. Adding this sauce to seafood dishes will likely aid development of flavoring substances.

• Bulletin of the Korean Chemical Society
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• 제22권9호
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• pp.975-978
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• 2001

A novel poly[9,10-diphenylanthracene-4',4"-ylenevinylene-3,6-(N-2-ethyl hexyl)carbazole] containing alternate diphenylanthracene and carbazole unit was synthesized by the Wittig reaction. The obtained polymer was soluble in common organic solvents and thermally stable up to 380 $^{\circ}C.$ The polymer gives rise to bright blue fluorescence both in solution and in thin solid films. The light emitted from the device (ITO/polymer/Al) was greenish-blue in color and clearly visible in daylight.

• 한국환경과학회지
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• 제13권6호
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• pp.599-603
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• 2004

In a batch reactor, the characteristics of photocatalytic degradation of brilliant blue FCF in titanium dioxide suspension was studied under the irradiation of ultra-violet ray. Photocatalytic degradation in anatase type of TiO$_2$ was more effective than in rutile type of $TiO_2$ below the dosage of 5g. The degradation rate was slightly increased with decreasing initial pH of brilliant blue FCF aqueous solution, but rapidly increased with the addition of oxidant. Potassium bromate acted as more effective oxidant than ammonium persulfate. The photocatalytic degradation rate of brilliant blue FCF was pseudo-first order with rate constants of 0.012, 0.006 and $0.003min^{-1}$ at initial pH 3.1, 5.2 and 7.1 of brilliant blue FCF solution, respectively.

• Bulletin of the Korean Chemical Society
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• 제33권5호
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• pp.1443-1444
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• 2012

• 접착 및 계면
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• 제13권3호
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• pp.109-115
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• 2012

2단계 유화중합에 의한 단분산의 블루칼라 착색 poly(styrene-co-acrylic acid) 라텍스를 성공적으로 제조하였다. 0.21 ${\mu}m$의 polystyrene 시드를 이용하여 중합 2단계에서 Blue 606 염료와 acrylic acid의 중합으로 carboxyl 음이온을 갖는 블루칼라 라텍스를 합성하였다. 본 연구에서 제조한 블루칼라 라텍스는 모두 1.01 이하의 우수한 단분산도를 가지며 0.25~0.42 ${\mu}m$ 범위의 입자경을 나타내었다. 중합 2단계에서 acrylic acid 부가시간이 늘어남에 따라 입자경은 증가하였고 30 min 이상으로 늘어남에 따라 콜로이드 안정성을 갖는 블루칼라 라텍스가 제조되었다. 20 wt% AA 농도에서 -145 mV의 제타전위와 $-9.4{\times}10^{-6}\;cm^2/Vs$의 전기영동이동도를 나타내었다. 25 wt% DVB 농도하에서 396.7 K의 높은 유리전이온도를 나타내었다.