• 대한화학회지
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• 제21권4호
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• pp.235-245
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• 1977

교감신경 흥분성 amine류의 분자구조와 약리효과 간의 관계를 설명하기 위하여 phenethylamine에서 benzene 고리와 ethylamine의 ${\alpha},{\beta}$ 위치와 amine의 질소에 hydroxy기와 methyl기 등을 도입한 23종의 약품에 대한 분자 특성을 EHT법으로 계산하여 검토하였다.

• 반도체디스플레이기술학회지
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• 제11권2호
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• pp.23-26
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• 2012

The monodispersed polystyrene spheres were prepared by emulsion polymerization in aqueous alcohol system. They coated with silver by reduction of silver ion percolated on the surface of them. The spherical hollow type silver has been prepared by dissolving polystyrene with toluene. Epoxy resin compositions with spherical hollow type silver were manufactured, which were composed of a bisphenol F type epoxy resin (RE-304S), amine type hardener (Kayahard AA), and 1-benzyl 2-methyl imidazole (1B2MI) as catalyst. The electrical conductivity with silver content ratio were investigated after cure, the percolation threshold weight ratio for conductance in this epoxy resin system was obtained above the 70 wt% of silver.

• Toxicological Research
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• 제25권2호
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• pp.85-92
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• 2009

4,4'-Methylenedianiline (MDA) is an aromatic amine that is widely used in the industrial synthetic process. Genotoxic MDA forms DNA adducts in the liver and is known to induce liver damage in human and rats. To elucidate the molecular mechanisms associated with MDA-induced hepatotoxicity, we have identified genes differentially expressed by microarray approach. BALB/c male mice were treated once daily with MDA (20 mg/kg) up to 7 days via intraperitoneal injection (i.p.) and hepatic damages were revealed by histopathological observation and elevation of serum marker enzymes such as AST, ALT, ALP, cholesterol, DBIL, and TBIL. Microarray analysis showed that 952 genes were differentially expressed in the liver of MDA-treated mice and their biological functions and canonical pathways were further analyzed using Ingenuity Pathways Analysis (IPA). Toxicological functional analysis showed that genes related to hepatotoxicity such hyperplasia/hyperproliferation (Timp1), necrosis/cell death (Cd14, Mt1f, Timp1, and Pmaip1), hemorrhaging (Mt1f), cholestasis (Akr1c3, Hpx, and Slc10a2), and inflammation (Cd14 and Hpx) were differentially expressed in MDA-treated group. This gene expression profiling should be useful for elucidating the genetic events associated with aromatic amine-induced hepatotoxicity and for discovering the potential biomarkers for hepatotoxicity.

• 한국발생생물학회지:발생과생식
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• 제5권1호
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• pp.9-16
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• 2001

Biogenic amine 류에는 catecholamine, indoleamine 그리고 histamine이 있으며, 동물의 다양한 생리 현상과 행동양식 조절에 중요한 역할을 담당한다. 이중 indoleamine 류인 세로토닌(serotonin혹은 5-hydroxytryptamine, 5-HT)의 경우 최근 들어 그 수용체 아형의 유전자 규명과 발현 조절, 중추신경계 및 표적 기관에서의 역할, 특히 항우울 효과와 같이 행동 및 심리적인 영향 등에 대해 광범위하게 연구되고 있다. 본 논문은 5-HT의 합성 경로, 수용체 아형, 생식과 관련된 기능에 대해 서술하였다. 특히 생식과 관련된 5-HT의 신경내분비학적인 역할로 GnRH-LH-sex steroids 축 조절 기능과 이에 관여하는 수용체 아형들, 생식 조절에 있어서 5-HT 효과의 성적 이형 양상, 중추신경계 이외 기관에서의 역할, 성행동의 조절에 대한 연구 결과들을 요약하였다. 5-HT의 기능에 대한 연구는 특히 현재 주목 받고 있는 '삶의 질' 고양과 밀접하게 연관되어있는 유망한 주제 가운데 하나로 판단된다.

• Journal of Applied Biological Chemistry
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• 제60권3호
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• pp.249-256
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• 2017

The Monascus azaphilone (MAz) pigment is a well-known food colorant that has yellow, orange and red components. The structures of the yellow and orange MAz differ by two hydride reductions, with yellow MAz being the reduced form. Orange MAz can be non-enzymatically converted to red MAz in the presence of amine derivatives. It was previously demonstrated that mppE and mppG are involved in the biosynthesis of yellow and orange MAz, respectively. However, ${\Delta}mppE$ and ${\Delta}mppG$ knockout mutants maintained residual production of yellow and orange MAz, respectively. In this study, we deleted the region encompassing mppD, mppE and mppG in M. purpureus and compared the phenotype of the resulting mutant (${\Delta}mppDEG$) with that of an mppD knockout mutant (${\Delta}mppD$). It was previously reported that the ${\Delta}mppD$ strain retained the ability to produce MAz but at approximately 10% of the level observed in the wildtype strain. A chemical analysis demonstrated that the ${\Delta}mppDEG$ strain was still capable of producing both yellow and orange MAz, suggesting the presence of minor MAz route(s) not involving mppE or mppG. Unexpectedly, the ${\Delta}mppDEG$ strain was observed to accumulate fast-eluting pigments in a reverse phase high-performance liquid chromatography analysis. A LC-MS analysis identified these pigments as ethanolamine derivatives of red MAz, which had been previously identified in an mppE knockout mutant that produces high amounts of orange MAz. Although the underlying mechanism is largely unknown, this study has yielded an M. purpureus strain that selectively accumulates red MAz.

• Korean Chemical Engineering Research
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• 제55권3호
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• pp.287-295
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• 2017

Using nanotechnology, magnetic nanoparticles of iron oxide were produced via co-precipitation method and followed modification with organic compounds. In the next step, functionalized monomer was provided via coupling ${\beta}$-cyclodextrine and allylamine onto modified magnetic nanoparticles. These nanoparticles were used to establish the adsorption rate of celecoxib. Magnetic nanoparticles are modified by (3-mercaptopropyl)trimethoxysilane. Nano-adsorbent was characterized by analytical and spectroscopic methods, such as Fourier transform infrared spectroscopy, elemental analysis, thermo-gravimetric analysis, and transmission electron microscopy (TEM). Laboratory parameters, such as the kinetics of adsorption isotherms, pH, reaction temperature and capacity were optimized. Finally, by using this nano-adsorbent in the optimized condition, extraction of celecoxib from biological samples as urine, drug matrix and blood plasma was carried out by high performance liquid chromatography with sensitivity and high accuracy.

• 분석과학
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• 제15권1호
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• pp.80-86
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• 2002

흡착/열탈착/GC/MS를 이용하여 우리나라와 일본의 법정 악취성분을 한 컬럼으로 동시분석이 가능한가를 검토하였다. 트리메틸아민, 아세트알데히드, 메틸메르캅탄, 이메틸황 은 대략적인 농도를 추정할 수 있었으며, 스티렌, 이황화메틸, 이황화이메틸 그리고 프로피온알데히드 n-부틸알데히드 i-부틸알데히드 n-발레르알데히드 i-발레르알데히드, 아세트산에틸, 톨로엔, 자일렌, 메틸이소부틸케톤, 이소부탄올에 대해서는 최소감지농도까지 검출할 수 있음을 확인할 수 있었다. 악취성분의 동시 분석 예로서 음식물 쓰레기의 퇴비화 과정에서 발생되는 휘발성 성분을 농축시켜 흡착/열탈착/GC/MSD에 의해 분석하고 각 성분의 농도와 최소 냄새감지 농도로부터 악취원인 성분을 예측하였다. 분석결과 34가지 물질에 대해 확인하였고, 이 중 트리메틸아민, 이소발레르알데히드, 메틸메르캅탄, 메틸알리황, 이메틸황, 아세트알데히드, 에탄올, n-부틸알데히드의 순으로 악위에 기여할 것으로 예상되었다.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 춘계학술대회
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• pp.47-50
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• 1997

We synthesized N-Hydroxysuccinimidyl (NHS) azidobenzoate as a cross-linking reagent for immobilization of peptide onto the solid surface. Thin polystyrene(PS) films spin-coated with a NHS azidobenzoate solution were exposed with ultraviolet light at 245nm$(3.3mW/cm^2)$ for 5 min. The NHS active ester groups became covalently attached to the polymer via photogenerated, highly reactive nitrene intermediates derived from NHS azidobenzoate. Using this technique, it is demonstrated that well-defined surface regions can be functionalized with a minimum observable feature size of 1mm for UV exposure. Through reaction of this functionalized PS surface with primary amine-containing biomolecules, biological molecule had been immobilized on the polymer surface.

• Applied Biological Chemistry
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• 제6권
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• pp.29-31
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• 1965

면양근육(緬羊筋肉)의 부위별(部位別)로 본 수용성(水溶性) 유리(遊離) Amino산(酸)의 분포(分布)를 조사(調査)한 결과(結果) 1. 분포(分布) Amino산(酸)의 종류(種類)는 대체(大體)로 cystine, histidine, arginine, aspartic acid, hydroxy proline, threonine, glutamic acid, alanine, proline, methionine, tryptophan, leucine, isoleucine, glycine, creatine 과 몇 종(種)의 amine 태화합물(態化合物)이 검출(檢出)되었다. 2. 조직별(組織別)로본 각(各) Amino산(酸)의 함량(含量)이 많은 것은 M. longissimus dorsi이고 다음이 M. glutaeus였다. 3. Amino산(酸)의 분포(分布)는 조직(組織)마다 함량(含量)의 차(差)는 있는듯하고, hydroxyproline이 M. masseter, M. pectorlis profundus, M. flexor digitalis pedis profundus 및 M. Quadriceps fomoris에서는 negative이었다.

• Journal of Microbiology and Biotechnology
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• 제18권11호
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• pp.1803-1808
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• 2008

For practical application, the stability of permeabilized Ochrobactrum anthropi SY509 needs to be increased, as its half-life of enzymatic denitrification is only 90 days. As the cells become viable after permeabilization treatment, this can cause decreased activity in a long-term operation and induce breakage of the immobilization matrix. However, the organic solvent concentration causing zero cell viability was 50%, which is too high for industrial application. Thus, whole-cell immobilization using glutaraldehyde was performed, and 0.1% (v/v) glutaraldehyde was determined as the optimum concentration to maintain activity and increase the half-life. It was also found that 0.1% (v/v) glutaraldehyde reacted with 41.9% of the total amine residues on the surface of the cells during the treatment. As a result, the half-life of the permeabilized cells was increased from 90 to 210 days by glutaraldehyde treatment after permeabilization, and no cell viability was detected.