• 한국응용과학기술학회지
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• 제26권3호
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• pp.233-239
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• 2009

A reaction device raising a generation yield by efficiently removing water generated in an esterified reaction between diethylene glycol monoethyl ether and succinic acid with mixture of an azeotropic point was newly developed as a new product in development of more stabilized emulsifier with a semi-solid phase(cream) in an emulsified phase of interfacial activity. The bis-(diethylene glycol monoethyl ether succinate(hereinafter, called as BDGS) with a high yield of more than 95% was obtained. As this has a property containing amphoteric emulsified functions such as W/O type or O/W type, etc., and has a merit that can be used regardless of any emulsified phase, there is no need using other emulsified surfactant. therefore, as this has excellent skin wetability in the cosmetics industry, a product having a wider range in quality compatibility or cost saving, etc. as a humectant has been developed.

• 유기물자원화
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• 제4권2호
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• pp.71-75
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• 1996

Trimethylamine, dimethylamine, methylamine 등의 아민류를 분해할 수 있는 미생물을 TMA를 성장기질로 사용한 농화배양으로부터 분리하였다. 분리된 균은 Methylobacterium sp. T32에 속하는 균으로 동정되었다. 이 균은 메탄올, 메틸아민류를 분해할 수 있으나, 다탄소화합물중에서는 malate, succinate, betaine과 같이 극히 제한된 종류의 유기화합물만을 분해할 수 있는 restricted facultative methylotroph였다. 이 균을 분변토에 고정하여 biofilter를 제작하였을 때 TAM gas를 SV $30h^{-1}$, 농도 120ppm를 연속적으로 분해했다.

• 미생물학회지
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• 제28권4호
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• pp.290-296
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• 1990

Putrescine, spermidine, and spermine were found to persent in Methylobacterium extorquens AM1 growing on methanol, succinate, glucose, or nutrient broth as an energy source. Spermidine was found to be a major polyamine in cells growing on methanol or succinate, while putrescine to be the one in nutrient broth-grown cells. The overall content of polyamines in cells growing on glucose was less than that in cells growing on other substrates. Spermine was the most abundant polyamine in glucose-grown cells. Accumulation of polyamines in M. extorquens AM1 was maximal at the mid-exponential or early stationary phase during growth on each substrate. The effect of polyamines added into the medium on the polyamine composition in M. extorquens AM1 was variable. Each polyamine added into the nutrient broth medium was found to increase the amount of the respective polyamine in the cell. Exogeneously added polyamines had no effect on the growth of M. extorquens AM1.

• 미생물학회지
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• 제3권2호
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• pp.15-21
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• 1965

Using the synchronous culture method and the manometric technique, changes in respiratory activities, utilization of some organic acids (succinate, malate, lactate and acetate etc.) and its effect on glucose metabolism in Chlorella cells at different growing stages were measured. 1) Endogenous respiration of the cells was not active at growing stage and was almost constant throughout the early ripening, maturing and division stages. 2) Lactate was utilized as respiratory substrate better than other organic acids tested. Exogenous respiration of glucose was most active at growing and maturing stages and was decreased strikingly at division stage. 3) Succinate and citrate inhibited endogenous and glucose respiration of the cells throughout the all life cycle. 4) Malate and acetate were utilized in the cells at early growing and division stages better, and malate enhanced the glucose respiration while in case of acetate it was depressed. 5) Calcium ion inhibited not only permeability of respiratory substrate but endogenous respiration itself.

• Bulletin of the Korean Chemical Society
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• 제25권1호
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• pp.122-126
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• 2004

Biofunctional nanohybrids are synthesized from layered double hydroxide (LDH) and the vitamins such as ascorbic acid and topopherol acid succinate. Either ion exchange or copricipitaion leads to successful intercalation of the vitamins into gallery space of LDH that offers a new route to safe preservation of bioactivity as well as controlled release. Intercalations of vitamins are clearly reflected on the increase in the basal spacing of ZnAl-(Nitrate) LDH from 8.5 ${\AA}$ to 10.5 ${AA}$ for ascorbate, and 49.0 ${AA}$ for tocopherol acid succinate, respectively. No significant change in UV-Vis and IR absorption characteristics of the intercalated vitamins strongly supports the safe maintenance of their bioactivities without any deterioration of chemical and structural integrity. Furthermore, it is shown that the hybridized vitamins could be discharged in a controlled kinetics.

• Bulletin of the Korean Chemical Society
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• 제1권2호
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• pp.49-54
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• 1980

Solutions of $Ni^{2+}$ and $Cd^{2+}$ were mixed with the solutions of various dibasic organic acids in the presence of cation exchange resin at room temperature. The distribution ratios of the metal ions between resin and solution were measured, using radioactive metal ions as tracer. From the observed variation of the distribution ratios with acid anion concentrations, it was concluded that $Ni^{2+}$ and $Cd^{2+}$ formed one-to-one complexes with succinate, malonate, o-phthalate and tartarate ions in aqueous, 20 % ethanol-water and 20 % acetone-water solutions. The results of the present study indicated that the relative stabilities of the complexes in solution increased generally in the order : $Ni^{2+}$ < $Cd^{2+}$ complexes. Succinate < malonate < o-phthalate < tartarate complexes. Aqueous < mixed solvent systems.

• 미생물학회지
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• 제31권3호
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• pp.214-217
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• 1993

Carbon monoxide dehydrogenase (CO-DH) was found to be present in Acinetobacter sp. strain JC1 grown on CO and also on methylotrophic and heterotrophic substrates, except for pyruvate and nutrient broth. The amounts of CO-DH in cells grown on methylamine, glucose, galactose, and succinate were comparable to that of the CO-grown cells. CO-DH activity, however, was onot deteted by the dye-linked assay method in cell extracts prepared from cells grown on organic substrates, except on ethanol and succinate. THe activity was detected when the CO-DH was stained by activity using CO as a substrate. CO-DHs in cells grown on different substrates were found to be identical in immunological properties.

• Journal of Pharmaceutical Investigation
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• 제18권3호
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• pp.161-165
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• 1988

• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 공동 춘계학술대회
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• pp.64.2-64
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• 1999

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 1997년도 공동 춘계학술대회
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• pp.78.2-78
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• 1997

No Abstract, See Full Text