• 한국환경농학회지
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• 제15권1호
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• pp.37-45
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• 1996

수도재배환경(水稻栽培環境) 및 현탁배양세포(懸濁培養細胞) 조건에서 생성된 PCP의 수용성대사물(水溶性代謝物)을 확인에 필요한 정보를 확보하기 위해서 이를 여러 chromatography로 충분히 정제한 다음 이것의 aglycons과 glycon(전보(前報)에서 ${\beta}-glucose$ conjugates인 것으로 추정)을 GC/MS로 분석, 동정하였다. Glycon, 즉 대사물의 polar부위(endocon)가 glucose임을 확인하므로써 전보에서 효소특이성을 통해 추론한 것을 입증할 수 있었다. 또한 conjugates의 source에 따라 다르기는 하였지만 배양세포에서의 aglycon(exocon)s는 주로 PCP, tetrachlorophenol이성체 및 tetra chlorocatechol을, 그리고 수도재배환경에서는 이 외에도 2,4,5- 및 2,4,6-trichlorophenol을 각각 확인할 수 있었다. 이러한 사실은 PCP glucose conjugates의 구조는 PCP뿐만 아니라 이것의 대사물인 Polychlorinated phenols가 개별적으로 glucose와 ${\beta}-anomeric$ conjugation을 이루고 있는 것으로 판단할 수 있었다. 그리고, 대사초기에 이미 여러 종류의 aglycon이 생성되는 것으로 보아 PCP자체도 빠르게 PCPs로 전환되는 것을 알 수 있었다.

• 한국환경농학회지
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• 제15권2호
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• pp.167-178
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• 1996

전보에서 대두(大豆)와 벼의 현탁배양세포(懸濁培養細胞)에서 생성된 PCP의 주요 수용성대사물은 PCP를 비롯한 여러 종류의 염화페놀과 glucose간 ${\beta}-linkage$로 연결된 ${\beta}-glucoside$ 구조를 가질 것으로 추정한 바 있다. 본 연구에서는 conjugates를 가수분해시키지 않는 조건에서 기기적인 방법으로 그 구조를 확인하고자 하였다. Acetyl화(化) 한 glucose conjugates는 aglycones 분석에서 예상한 대로 3종류 이상이 존재하는 것으로 확인할 수 있었으며, 충분히 정제한 각각의 acetyl화(化) 대사물을 FAB-MS로 분석한 결과 분자량과 aglycones part와 관련된 특징적 spectral data 등 conjugates 구조 확인에 필수적인 정보를 얻을 수 있었다. 이러한 구조적 정보와 지금까지의 연구 결과, 즉 현탁배양초기에 생성된 PCP의 glucose conjugates는 ${\beta}-glucosidase$에 의해 특징적으로 가수분해되고, aglycones이 PCP 외에도 tetrachlorophenol 및 tetrachlorocatechol 등이라는 사실을 종합할 때 현탁배양에서 생성된 conjugates는 주로 pentachlorophenyl ${\beta}-D-glucopyranoside$, tetrachlorophenyl ${\beta}-D-gluco$ pyranoside 및 2-hydroxy-3,4,5,6-tetrachlorophenyl ${\beta}-D-glucopyranoside$인 것으로 확인할 수 있었다.

• 한국환경농학회지
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• 제11권3호
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• pp.215-223
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• 1992

Pentachlorophenol(PCP)가 대두(大豆) 및 벼 현탁배양(縣濁培養)과 과 수도체 중에서 수용성성분(水溶性成分)으로 전환(轉換)되는 것을 경시적으로 조사하여 다음과 같은 결과를 얻었다. 1. 현탁배양에서 처리한 PCP의 50%가 수용성 대사물로의 전환되는 시간은 대두의 경우 4시간, 벼는 48시간 이내였다. 수용성 대사물의 생성속도와 양은 PCP의 cell 생육 저해 정도와 밀접한 관계가 있었다. 2. 식물 cell에서 PCP의 주(主) 대사과정(代謝過程)은 생육시기(生育時期) 및 약제(藥劑) 처리시간(處理時間)을 달리한 전환시험에서 얻은 수용성 대사물 및 glucose cunjugates 함량변화 조사와 conjugates가 가수분해 되는 성질로부터 glucose conjugates(${\beta}$-anomers)형성 반응(反應)임을 알 수 있었다. 3. Cell에서 glucose conjugates는 약제처리(藥劑處理) 초기 및 대수성장기 이전에 생성 속도가 매우 빨라 전체 수용성 대사물의 70% 이상이었으며, 점차 비가수분해성 극성성분(極性成分)으로 전환되었고, 일부는 배양액(培養液)으로 분필(分泌)되었다.

• Journal of Microbiology and Biotechnology
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• 제28권2호
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• pp.298-304
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• 2018

The single-vessel multienzyme UDP-${\alpha}$-$\text\tiny{D}$-glucose recycling system was coupled with a forward glucosylation reaction to produce novel glucose moiety-conjugated derivatives of different tetracycline antibiotic analogs. Among five tetracycline analogs used for the reaction, four molecules (chlorotetracycline, doxytetracycline, meclotetracycline, and minotetracycline) were accepted by a glycosyltransferase enzyme, YjiC, from Bacillus licheniformis to produce glucoside derivatives. However, the enzyme was unable to conjugate sugar units to rolitetracycline. All glucosides of tetracycline derivatives were characterized by ultraviolet absorbance maxima, ultra-pressure liquid chromatography coupled with photodiode array, and high-resolution quadruple time-of-flight electrospray mass spectrometry analyses. These synthesized glucosides are novel tetracycline derivatives.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.297-298
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• 2001

Numerous studies have shown that ascorbic acid is an indispensable micronutrient required to maintain the physiological processes of different animals including most of fishes. L-ascorbyl-2-glucose (AA2G) is an $\alpha$-glucose conjugate of AA on the C-2 position and a newly found AA derivative front Kimchi, Korean traditional fermented vegetable food, AA2G s stable to ascorbate oxidase and heating, it can be effectively hydrolyzed in vitro by the rice seed $\alpha$-glucosidase. (omitted)

• Bulletin of the Korean Chemical Society
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• 제18권5호
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• pp.515-519
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• 1997

In a competitive enzyme immunoassay, the performance was tested with different analyte-enzyme conjugates (signal generators) in their binding constants to antibody. Analyte (progesterone)-enzyme (glucose oxidase; GO) conjugates were chemically synthesized and purified by using a gel column with an immobilized antibody to progesterone. In an elution range from the column, four peaks were detected by measuring total enzyme activities. Results from further analysis indicated that the first peak contained mainly unreacted GO while the next three peaks conjugated GO with progesterone. These three conjugate preparations were compared in dose-response curves along with the unpurified mixture. The purified conjugates showed higher detection capabilities than did the mixture. Especially, the preparation in the second peak next to the free GO peak improved the detection limit five times. This performance was comparable to that of a progesterone-horseradish peroxidase conjugate that has been identified to have one progesterone ligand.

• Food Science and Biotechnology
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• 제14권6호
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• pp.743-746
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• 2005

A dipstick-type immunochemical biosensor for the detection of the organophosphorus insecticide fenthion was developed using a screen-printed electrode system as an amperometric transducer with polyclonal antibodies against fenthion as a bioreceptor. The assay of the biosensor involved competition between the pesticide in the sample and pesticide-glucose oxidase conjugate for binding to the antibody immobilized on the membrane. This was followed by measurement of the activity of the bound enzyme by the supply of the enzyme substrate (glucose) and amperometric determination of the enzyme reaction product ($H_2O_2$). The activity of the bound enzyme was inversely proportional to the concentration of pesticide. The optimized sensor system showed a linear response against the logarithm of the pesticide concentration ranging from $10^{-2}$ to $10^3\;{\mu}g/L$.

• 약학회지
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• 제48권6호
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• pp.369-373
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• 2004

We previously reported that Streptococcus pneumoniae capsule attached to the surface protein (JY-Pol) was protective to systemic pneumococcal infection. The JY -Pol antigen induced IgM, IgG, and IgA in mice and provoked cell-mediated immunity. In this current study, we investigated the effect of anti JY-Pol antiserun and monoclonal antibody C2 (Mab C2) specific for the JY-Pol antigen against the pneumococcal disease. Mice that were given the antiserum survived longer than mice that received antiserum pre-absorbed with S.pneumoniae cells or DPBS as a negative control. Heat-treated anti JY-Pol antiserum resulted in survival rates similar to intact fresh JY-Pol antiserum. Mab C2 isolated from JY-Pol-immunized mice also enhanced resistance of naive mice against the pneumococcal diseaser. This protection by Mab C2 appeared to be mediated by opsonization as determined in a RAW 264.7 monocyte/macrophage cell line. Epitope analysis showed that Mab C2 epitope consisted of glucuronic acid and glucose that blocked the interaction of JY-Pol to the C2. Taken together, these data indicate that the antiserum induced by the JY-Pol, a naturally pneumococcal conjugate formula, mediated the protection by passive transfer, which was confirmed by protective effect of Mab C2.

• Journal of Microbiology and Biotechnology
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• 제17권6호
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• pp.1002-1009
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• 2007

A rapid, convenient homogeneous competitive enzyme immunoassay for estimating the amount of fenthion is described. The assay utilizes glucose-6-phosphate dehydrogenase-hapten conjugates that are inhibited in solution by antibodies obtained from bovine serum albumin-hapten conjugates. In order to investigate the effects of bridging group recognition on the sensitivity of dose response characteristics, the bridging groups of varying alkyl chain length were attached at the phosphate position of fenthion. Among the antibodies used, the one obtained from the use of hapten (fenthion analog) with the same bridging group structure that was used in preparing the enzyme-fenthion conjugates showed maximum inhibition (up to 51.8%) in the absence of fenthion. In the presence of fenthion, the activity of the enzyme-hapten conjugate is regained in an amount proportional to the fenthion concentration. Under the optimized condition, the $ED_{50}$ value for fenthion was $0.809{\mu}g/ml$. The assay developed in this study is a rapid effective screening method for fenthion prior to precise analysis.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.755-758
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• 2005

This paper describes the novel immunoassay sensing system for a portable clinical diagnosis system. It consists of a bead cage reactor and a CMOS integrated biosensor. It showed the simple and easy antibody coating method on beads by flow-through avidin biotin complex technology in a microfluidic device. It showed just 90 nL sample consumption and good result for the application of alpha feto protein. The bead cage reactor has the role of the antibody coating, antigen binding and enzyme linking for the electrochemical sensing method. The CMOS biosensor consists of ISFET (ion selective field effect transistor) biosensor and temperature sensor for detecting pH that is the byproduct of enzyme reaction. The sensitivity is 8 $kHz/^{\circ}C$ in a temperature sensor and 33 mV/pH in a pH sensor. After filling the 15 um polystyrene beads in bead cage, antibody flowed and reacted to beads. Subsequently, the biotinylated antigen flowed and bound to the antibody and GOD (glucose oxidase)-avidin conjugate flowed and reacted to the biotin of the biotinylated antigen. After this reaction process, glucose solution flowed and reacted to the GOD on beads. The hydrogen was generated by glucose-GOD reaction. And it was detected by the pH sensor.