• Title/Summary/Keyword: Succinate

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A New Chemosensing Ensemble for Colorimetric Detection of Oxalate in Water

  • Tang, Li-Jun;Liu, Ming-Hui
    • Bulletin of the Korean Chemical Society
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    • v.31 no.11
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    • pp.3159-3162
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    • 2010
  • To realize highly selective recognition of oxalate in water, a new chemosensing ensemble that behaves highly selective colorimetric recognition of oxalate in water at pH 7.4 has been developed. The ensemble was constructed by a pyrrole containing mononuclear copper complex and chromeazurol S. The ensemble shows a highly selective recognition of oxalate through an obvious color change from blue to yellow upon the addition of oxalate, whereas, other dicarboxylates such as malonate, succinate, fumarate, maleate, glutarate, adipate, phthalate, isophthalate and terephthalate do not induce any noticeable color changes. The oxalate recognition process is not significantly affected by other coexisting dicarboxylate.

Characterization of Heat-Stable Enterotoxin of Enterotoxigenic Escherichia coli eKT-53 (장독성 대장균 eKT-53균주의 내열성 장독소의 성질)

  • 도대홍;김교창;김도영
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.20 no.6
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    • pp.621-628
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    • 1991
  • Heat-stable enterotoxin(ST) from enterotoxigenic E. coli eKT-53($ST^{+}\;LT^{-}$, transformant from isolate KM-7) that was produced in succinate salts medium. The culture supernatant(crude ST) was purifed by mulitpled steps and investigated some characterization of the ST. The heatstability of purified ST activity was completely lost by treating at $100^{\circ}C$ for 30minutes. ST activity was lost by treatment at pH 1 and 12 conditions, while the activity was not reduced by treatment at pH 2~10, and then the ${\alpha}-amylase$ and pepsin was not decreased activity but disulfide reducing agnets was lost the activity. The molecular weight of the purified ST was approximately 4,200, the isoelectric point was about 4.0.

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BIOLOGICAL PRETREATMENT OF HIGH ENERGY SORGHUM (하이에너지수수의 생물학적 전처리)

  • ;H.K
    • KSBB Journal
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    • v.7 no.1
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    • pp.1-7
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    • 1992
  • Degradation of structural carbohydrates has been observed in samples of sweet sorghum inoculated with either Clostridium cellulolyticum or Bacteroides succinogenes. However, conditions under which these rellulolytic organisms can compete effectively with lactic acid bacteria have not yet been determined. Degradation of cellulose by B. succinogenes was found not to be inhibited by either glucose or succinate.

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Morphologically Controlled Growth of Aluminum Nitride Nanostructures by the Carbothermal Reduction and Nitridation Method

  • Jung, Woo-Sik
    • Bulletin of the Korean Chemical Society
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    • v.30 no.7
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    • pp.1563-1566
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    • 2009
  • One-dimensional aluminum nitride (AlN) nanostructures were synthesized by calcining an Al(OH)(succinate) complex, which contained a very small amount of iron as a catalyst, under a mixed gas flow of nitrogen and CO (1 vol%). The complex decomposed into a homogeneous mixture of alumina and carbon at the molecular level, resulting in the lowering of the formation temperature of the AlN nanostructures. The morphology of the nanostructures such as nanocone, nanoneedle, nanowire, and nanobamboo was controlled by varying the reaction conditions, including the reaction atmosphere, reaction temperature, duration time, and ramping rate. Iron droplets were observed on the tips of the AlN nanostructures, strongly supporting that the nanostructures grow through the vapor-liquid-solid mechanism. The variation in the morphology of the nanostructures was well explained in terms of the relationship between the diffusion rate of AlN vapor into the iron droplets and the growth rate of the nanostructures.

Rare Odontalgia of Mandibular Teeth Associated with Migraine: A Case Report

  • Im, Yeong-Gwan;Kang, Jin-Kyu
    • Journal of Oral Medicine and Pain
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    • v.43 no.3
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    • pp.92-96
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    • 2018
  • A 39-year-old male presented with severe pain in right posterior mandibular teeth and temporal area. Initially, the pain in the mandibular teeth was moderate, but the concomitant headache was unbearably severe. His medical history was non-contributory. The clinical and radiographic examination failed to reveal any pathology in the region. There was no tenderness to palpation in the temporalis and masseter muscles or temporomandibular joints. The clinical impression was migraine. The pain in the teeth and headache were aborted using ergotamine tartrate and sumatriptan succinate. Atenolol prevented further pain, while amitriptyline and imipramine had no effect. Migraine can present as non-odontogenic pain in the mandibular teeth, although not as frequently as in the maxillary teeth. A correct diagnosis is essential to avoid unnecessary dental treatments and to manage pain effectively. Clinicians should be able to identify migraine with non-odontogenic dental pain and establish a proper diagnosis through a comprehensive evaluation.

Studies on Effects of Antibiotics on Pyrogen Tests

  • Shin, Kwang-Bum;Song, Young-Joon;Kim, Jung-Woo
    • Journal of Pharmaceutical Investigation
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    • v.16 no.2
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    • pp.85-88
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    • 1986
  • To estimate the effect of some injectable antibiotics (ampicillin sodium, cefazolin sodium, cephaloridine, cefuroxime sodium and chloramphenicol sodium succinate) on pyrogen tests, the Limulus amebocyte lysate (LAL) test and an ultrafiltration technique were used. The rabbit pyrogen test was also used in the case of cafazolin sodium. At high antibiotic concentrations, these samples which were artificially contaminated with endotoxin inhibited the gelation reaction of LAL. But the gelation reaction occurred when most of the antibiotic was removed by ultrafiltration. Likewise, cefazolin sodium interfered not only with the LAL test but also with the rabbit pyrogen test. From these results it can be said that special modification to eliminate interference should be taken into consideration for valid method of pyrogen tests in the parenteral products containing these antibiotics.

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Metabolic Characterization of Lactic Acid Bacterium Lactococcus garvieae sk11, Capable of Reducing Ferric Iron, Nitrate, and Fumarate

  • Yun, Su-Hee;Hwang, Tae-Sik;Park, Doo-Hyun
    • Journal of Microbiology and Biotechnology
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    • v.17 no.2
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    • pp.218-225
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    • 2007
  • A lactic acid bacterium capable of anaerobic respiration was isolated from soil with ferric iron-containing glucose basal medium and identified as L. garvieae by using 16S rDNA sequence homology. The isolate reduced ferric iron, nitrate, and fumarate to ferrous iron, nitrite, and succinate, respectively, under anaerobic $N_2$ atmosphere. Growth of the isolate was increased about 30-39% in glucose basal medium containing nitrate and fumarate, but not in the medium containing ferric iron. Specifically, metabolic reduction of nitrate and fumarate is thought to be controlled by the specific genes fnr, encoding FNR-like protein, and nir, regulating fumarate-nitrate reductase. Reduction activity of ferric iron by the isolate was estimated physiologically, enzymologically, and electrochemically. The results obtained led us to propose that the isolate metabolized nitrate and fumarate as an electron acceptor and has specific enzymes capable of reducing ferric iron in coupling with anaerobic respiration.

The Effect of Complexing Agent on the Deposit Charateristics in the Electroless Nickel Plating Solution (무전해 니켈 도금액에서 착화제가 도금피막에 미치는 영향)

  • Jeon Jun-Mi;Koo Suck-Bon;Lee Hong-Kee;Park Hae-Duck;Shim Su-Sap
    • Journal of the Korean institute of surface engineering
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    • v.37 no.6
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    • pp.326-334
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    • 2004
  • Deposit charateristics of Electroless nickel(EN) were investigated with various complexing agents. As expected, the deposition rate of nickel is increased with pH and that of Phosphorous is decreased with pH. The result of SEM investigation shows that the rough surface crystallization is appeared with pH. It is show that the surface resistance of EN deposit is decreased with pH at 85$^{\circ}C$.

Magnetic Properties of a Perpendicular Magntic Film Made Electroless Plating a Succining Bath (Succinatw-Citrate 계 무전해 도금에 의한 수직자기 박막의 자성특성)

  • 김영우;박정일;고석수;이주성
    • Journal of the Korean institute of surface engineering
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    • v.21 no.1
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    • pp.3-9
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    • 1988
  • An electroless plating both for normal orientation of HCP-structure of Co-P to the film plane was developed. An ammonical succinate-citrate bath containg MnSo4, NiSO4 was studied Ni was codeposited into the films in order to decrease the saturation magentization (MS) since low Ms is necessary to decrease the magentizing fild. Mn was also codeposited to increase perpendicular orentaon of Co-P film. Effects on film composition and magnetic properties were studid in connection with follwing four factors such as concentration of NiSo4 and MnSo4, bath temp and pH.

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Enzyme-histochemical Studies of LDH and SDH on Developing Spirometro erinocei. (Spirometra erinacei의 발육에 따른 LDH와 SDH의 조직화학적 연구)

  • 곽기훈;김창환
    • The Korean Journal of Zoology
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    • v.35 no.3
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    • pp.362-371
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    • 1992
  • Spiromeiru erinocer익 유충(sparganum)을 전이숙주(paratenic host)인 흰쥐와 종숙주인 고양이에 감염시켜 발육단계에 따라 회수해서 유충과 성충조직의 LDH(lactate dehydrogenase)와 SDH(succinate dehydrogenase)의 분포상 및 동위효소 유형을 효소조직화학적 방법과 전기영동법으로 조사하였다. 첫째, 유충조직에서의 LDH분포는 발육과정에 따른 차이는 없었으며 표피층과 실질근층에 비해 표피근층이 많이 분포하였다. 성체조직에서도 표피근층에 많이 분포하였는데 특히 성체의 표피층에서의 LOH 활성은 수태편절에서 상당히 많은 활성을 보인 반면 다른 편절의 표피층에서는 LDH의 활성이 없었다. 둘째, SDH의 조직분포는 유충과 성충 모두 표피근층에 많이 분포하58h으며 유충에서의 발육 후기는 발육초기보다 SDH의 분포량이 증가하였다. 셋째, LDH등위효소 유형은 유충과 성충에서 2개씩 나타났는데 유충에서는 M.W. 140 Kd가, 성충에서는 56 Kd가 주분획(major band)이었다. 넷째, SDH등위효소는 유충에서 1개(132 Kd), 성충에서 2개(132 Kd, 45 Kd)가'분리되었으며 성충에서 활성이 높게 나타난 band는 45 Kd인 단백질이었다.

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