• 미생물학회지
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• 제19권4호
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• pp.179-185
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• 1981

한강 수계에서 SDBS (Sodium Dodecyl Benzene Sulfonate)를 유일한 탄소원으로 가지는 최소배지에서 서란 120 균주중 $4^{\circ}C$에서 생장이 좋은 8균주를 선택하여 동정하였으며. 이들의 온도에 따른 생장파 분해능을 흡광도 분석기를 이용하여 측정하였다. 동정 결과. Ps. fluorescens가 4균주, Ps. putida가 2균주 이었다. 이들중 Ps. fluorescens LP6, Ps. lido Lei, Ps. fluorescens LS 6의 비생장율은 모두 $25^{\circ}C$에서 가장 높은 값을 나타냈으나 정체기에서의 균체량은 $5^{\circ}C$ 에서 가장 높았다. 따라서 이들 3 균주는 faculfative psychrophilic bacteria로 사료된다. 한편 SDBS의 분해는 세포가 정체기에 들어가면서 시작되었으며, 분해능은 $25^{\circ}C$C에서 가장 좋았다.

• Journal of Microbiology and Biotechnology
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• 제23권6호
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• pp.843-849
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• 2013

A dye-decolorizing bacterium was isolated from a soil sample and identified as Bacillus thuringiensis using 16S rRNA sequencing. The bacterium was able to decolorize three different textile dyes, namely, Reactive blue 13, Reactive red 58, and Reactive yellow 42, and a real dyehouse effluent up to 80-95% within 6 h. Some non-textile industrially important dyes were also decolorized to different extents. Fourier transform infrared spectroscopy and gas chromatography-mass spectrometer analysis of the ethyl acetate extract of Congo red dye and its metabolites showed that the bacterium could degrade it by the asymmetric cleavage of the azo bonds to yield sodium (4-amino-3-diazenylnaphthalene-1-sulfonate) and phenylbenzene. Sodium (4-amino-3-diazenylnaphthalene-1-sulfonate) was further oxidized by the ortho-cleavage pathway to yield 2-(1-amino-2-diazenyl-2-formylvinyl) benzoic acid. There was induction of the activities of laccase and azoreductase during the decolorization of Congo red, which suggests their probable role in the biodegradation. B. thuringiensis was found to be versatile and could be used for industrial effluent biodegradation.

• 한국의류학회지
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• 제20권2호
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• pp.390-397
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• 1996

The effects of the mixture of surfactants on the removal of triolein applied to cotton and polyester fabrics were studied. The sunactants which were usually formulated to the Iriundry detergents, such as sodium dodecyl sulfonate (LAS), sodium lauryl sulfate (AS), $\alpha$-olefin sulfonate (AOS, C=14), sodium laurethoxy sulfate (AES, EO=3) and lauryl ethoxylate (AE, EO=7) were used. Washing was done at 40'C, 60"C, 80'c and the surfactant concentration was 0.05%. Backscattered electron imaging was made to study the location of triolein in the yarns. Triolein was removed easily from polyester than cotton fabrics.01eic acid added triolein wa9 removed greater than triolein only, except in AE solutions. In AE solutions, the removal of triolein was increased as the tremperature went higher and the increasing rate of the removal of triolein only was greater than that of oleic acid added triolein. In the result, more triolein was removed from triolein only than from oleic acid added triolein at 80t When the other surfactant was added to LAS, AES was the best to cotton fabrics, AOS was to polyester fabrics. Triolein was located in the lumen and grooves of the fibers and the deeper interfiber spaces. Triolein did not make thin film arround the cotton fiber in the surface, but polyester fibers. These are the main reason why the removal of triolein was difficult from cotton fabrics.rics.

• Bulletin of the Korean Chemical Society
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• 제33권1호
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• pp.204-208
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• 2012

A novel chemiluminescence (CL) flow injection method for the determination of balofloxacin is described. The method is based on the weak CL signal arising from the reaction of $KBrO_3$ with $Na_2S_2O_4$ in acidic medium being significantly enhanced by balofloxacin in the presence of europium (III) ion and sodium dodecyl benzene sulfonate (SDBS). The experimental conditions that affected CL intensity were carefully optimized and the CL reaction mechanism was briefly discussed. Under the optimum conditions, the relative CL intensity was proportional to the concentration of balofloxacin in the range of $7.0{\times}10^{-11}$ to $3.0{\times}10^{-7}g\;mL^{-1}$. The detection limit was $2.7{\times}10^{-11}g\;mL^{-1}$ and the relative standard deviation was 2.1% for $7.0{\times}10^{-10}g\;mL^{-1}$ balofloxacin (n = 13). The proposed method was successfully applied to the determination of balofloxacin in pharmaceutical formulations and biological fluids.

• 접착 및 계면
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• 제15권3호
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• pp.93-99
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• 2014

본 Styrene (ST)과 sodium 1-allyloxy-2-hydroxypropane sulfonate (COPS-I)의 무유화 공중합을 다양한 중합조건(ST, COPS-I, KPS, DVB의 농도 및 중합온도)하에서 실시하여, 165~550 nm 입자경 범위의 단분산 라텍스를 제조하였다. 일반적으로 COPS-I와 KPS의 농도, 중합온도, DVB의 농도 등의 변화는 고분자 입자수(입자경), 중합속도, 분자량, 제타전위 등에 밀접한 영향을 미침을 발견하였다. 입자수의 증가는 중합속도와 제타전위를 증가시켰으나 분자량은 감소하였다.

• Journal of Magnetics
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• 제21권2호
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• pp.229-234
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• 2016

Aiming to prepare high performance magnetorheological fluid, firstly, oleic acid and sodium dodecyl benzene sulfonate are chosen as surfactants. And then, the mechanical stirring process including stirring time, stirring temperature and stirring speed are optimized by measuring sedimentation ratio and zero-field viscosity. Finally, the properties of prepared magnetorheological fluid are elaborated. The results indicate that the compounding of oleic acid and sodium dodecyl benzene sulfonate can improve the properties of magnetorheological fluid distinctively, and the optimistic compounding content is 4g:4g or 5g:5g. The surfactants adding orders and the second stirring time have little effect on the properties of magnetorheological fluid, while obviously of the first stirring time, temperature and speed. Moreover, the sedimentation ratio of prepared magnetorheological fluid is less than 5.2% in two weeks, the zero-field viscosity is smaller than $0.6Pa{\cdot}s$ at $20^{\circ}C$, and the maximum yield stress is higher than 50 kPa.

• 한국자원식물학회지
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• 제25권5호
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• pp.652-655
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• 2012

좀비비추 'Blue Edge'는 돌연변이 유기용 화학물질인 EMS(ethyle methane sulfonate)용액을 이용하여 돌연변이개체를 유기하고 그 중에서 잎 가장자리에 진한 녹색무늬가 들어간 식물체를 선발하여 영양번식한 품종이다. 2003년부터 3년간 특정검정을 실시하였는데, 'Blue Edge'는 잎가장자리에 진한 녹색무늬가 년 중 변함없이 균일하게 발현 되는 것이 특징이다. 잎의 무늬가 독특하여 분화 및 화단용 반음지성 지피식물로 이용될 수 있는 유용한 신품종이다.

• 한국자원식물학회지
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• 제25권4호
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• pp.504-506
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• 2012

'Yellow Tiara'는 돌연변이 유기용 화학물질인 MMS(methyle methane sulfonate)용액을 이용하여 돌연변이 개체를 유기하고 그 중에서 연두색의 잎을 가진 식물체를 선발하여 영양번식한 품종이다. 2004년부터 3년간 특정검정을 실시하였는데, 'Yellow Tiara'는 잎 전체가 순수한 연두색으로서 년 중 색상에 변함이 없고 특성이 균일하게 발현된다. 잎의 색상이 독특하고 분화 및 화단용 반음지성 지피식물로 이용될 수 있는 유용한 신품종이다.

• Environmental Analysis Health and Toxicology
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• 제22권3호
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• pp.271-277
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• 2007

Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are fully flurorinated organic compounds which are highly persistent in environment and accumulated in organism. These chemicals are released to the environment at their manufacture, during their use in industrial and consumer applications and from disposal after their use. The purpose of this study was to determine the effects of PFOA and PFOS on the freshwater flea (Moina macrocopa). Acute toxicity test and chronic toxicity test were performed for 2 days and 10 days, respectively. Acute toxicity was assessed on the basis of mortality, while chronic toxicity was assessed by fecundity as well as mortality. The acute toxicity studies on PFOA and PFOS showed that the values of $LC_{50}$ were $73.9\;mg/L\;and\;27.7\;mg/L$ respectively. In the chronic toxicity test, fecundity was reduced significantly at 24.1 mg/L of PFOA and 9.3 mg/L of PFOS, respectively. Conclusively, the results of this work suggest that Moina macrocopa could be a suitable model organism for screening and assessing of environmental pollutants in water.

• 자원리싸이클링
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• 제9권6호
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• pp.9-14
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• 2000

CSAC와 WPAC의 흡착특성을 보면 H공장 2차 처리수와 D공장 배출수에 함유된 ABS흡착에서 얻어진 Freundlich흡착등온식은 WPAC인 경우 q=23.12 $C^{ 0.42}$, q=18.32 $C^{0.38}$ 이고 CSAC인 경우 각각 $q=36.76C^{1.37}$ , q=26.67 $C^{0.42}$ 이었다. H공장 방류수의 파과점은 CSAC인 경우 680분이었고 WPAC는 610분이었다. 한편 D공장 배출수의 파과점은 CSAC인 경우 720분이었고 WPAC은 640분이었다. 이상의 결과로부터 CSAC 대체물로서 WPAC이 가능성이 있을 것으로 생각된다.