• 미생물학회지
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• 제23권4호
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• pp.241-247
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• 1985

Pseudomonas fluorescens에 의해 세포외에 생산된 furfural의 furoic acid로의 생물학적 전환을 촉진시키는 ninhydrin 반응에 양성인 대사물 (Ninhydrin positive Substance=NPS)을 ion exchange chromatography와 gel permeation chromatography 그리고 cellulose columm chromatography에 의하여 분리, 정제하였다. IR spectrophotometry와 $^H$-NMR spectrometry 그리고 $^{13}C-NMR$ spectrometry에 의해 이 NPS는 -$^H$ and $-NH_2$와 그리고 $-CH_2-OH$group을 갖는 유기물질로 추정된다.

• 한국약용작물학회지
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• 제12권3호
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• pp.179-182
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• 2004

단삼(丹蔘)을 bioassay-directed fractionation에 의한 에탄올 추출물의 클로로포롬 분획물을 silica gel column chromatography, recycling preparative-HPLC 등을 실시하여 항균활성을 나타내는 2개의 화합물을 분리하여 이화학적 성상 및 spectra data (IR,$^1H-NMR,\;^{13}C-NMR$ 및 Mass)에 의해 각각 Cryptotanshinone과 dihydrotanshinone I으로 동정하였으며, 이들 화합물의 항균성 (MIC)은 각각 S. epidermidis에 대하며 $6.3,\;3.1\;{\mu}g/ml$와 S. pyogenes에 대해 $6.3\;{\mu}g/ml$로 비교적 높은 활성을 나타내어 항생제로서 개발 가능성을 보여주었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.191-194
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• 2002

Humic acid, fulvic acid and humin present in volcanic ash soil were isolated by IHSS standard procedure and their characteristics were analyzed as a basic study to evaluate the effect of humic substances on the behaviour of pollutants in contaminated surface soil. The volcanic ash soil contained 42.1 % of total organic matter based on the oven-dried soil, and humin, humic and fulvic acids corresponded to 67.5 %, 15.2 %, 7.6 % of TOM respectively. Structural informations of the humic fractions were obtained from their elemental analysis and IR, CPMAS C-13 NMR spectral analysis and the differences among them are discussed with their C/H, O/C ratios and distributions of carbon types in the molecules.

• 대한화학회지
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• 제51권6호
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• pp.520-525
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• 2007

Thiourea/urea, 다양한 aromatic aldehydes, ammonium acetate의 세가지 요소를 가지고 마이크로파의 조 사하에서 무수조건의 활성화된 비산화재를 촉매로 사용하여 높은 수율의 6-aryl-1,2,4,5-tetrazinan-3-thiones/ones를 얻었 다. 6-aryl-1,2,4,5-tetrazinan-3-thiones/ones의 구조는 녹는점, MS, IR, 1H NMR, D2O 교환, 13C NMR, 이차원의 NMR 스펙트럼(HOMOCOR, HSQC)을 바탕으로 증명되었다.

• Journal of the Korean Wood Science and Technology
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• 제31권1호
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• pp.16-21
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• 2003

느릅나무 근피의 메탄올 추출물을 분획하여 항균성을 측정한 결과 항균력이 가장 우수한 수용성 분획을 silicagel column chromatograpy 및 TLC에 의해 분리·정제한 다음 정제 화합물을 UV, IR, ¹H-NMR, ¹³C-NMR를 사용하여 구조를 동정하고 그 화합물의 항균력을 검정하였다. 수용성 분획물로부터 두 종류의 정제 화합물을 단리하였다. 기기분석 결과, 화합물 B는 Catechin rhamnoside로 확인되었다. 단리된 정제화합물은 Staphylococcus aureus 및 Salmonella typhimurium에 대하여 항균활성을 나타내었다.

• Bulletin of the Korean Chemical Society
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• 제34권3호
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• pp.875-883
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• 2013

Ten new derivatives of 1,3-diazabicyclo[3.1.0]hex-3-enes linked via ether linkage to chalcones were synthesized and characterized by UV, FT-IR, $^1H$ NMR and $^{13}C$ NMR spectral techniques. The spectra of all synthesized compounds, confirmed structure-photochromic behavior relationships (SPBR) both in solution or in solid state by irradiation under UV light at 254 nm. In other efforts for first time photochromic behavior of ketoaziridines has been investigated.

• Bulletin of the Korean Chemical Society
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• 제27권6호
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• pp.893-898
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• 2006

Novel bis- and tris-crown ethers were synthesized from 1-aza and diaza-crown ethers with 2-acryloyloxy-methyl crown ethers through Michael addition. The synthesized bis- and tris-crown ethers were characterized by their elemental analyses, $^1H$-NMR, $^{13}C$-NMR, mass spectra, IR spectra, respectively. The complexation behavior of the bis- and tris-crown ethers with $Li^+$, $Na^+$, $Na^+$, $Rb^+$, $Cs^+$ was examined by $^1H$-NMR, FAB mass, and UV spectrometry.

• Preventive Nutrition and Food Science
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• 제13권3호
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• pp.241-244
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• 2008

Methanol extracts were prepared from Z. schinifolium leaf and successively fractionated with chloroform, butanol, and water. The butanol fraction exhibited the highest antioxidative activities. Therefore the butanol fraction was purified and a chemical structure was identified by $^1H-^{13}C-NMR$ spectra, and FT-IR. The isolated antioxidative substance was identified as quercitrin.

• Bulletin of the Korean Chemical Society
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• 제20권3호
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• pp.355-361
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• 1999

To improve the volatility and stability of lead complexes, the principle of stabilization by saturating the metal coordination sphere by intramolecular coordination through a β-diketonates with an ethereal group has was tested. Several new lead complexes with alkoxyalkyl-substituted β-diketonates, Pb(R1C(O)CHC(O)(CH2)3OR2)2(Rl=t-Bu, Me, OMe, i-Pr, R2=Me, Et), or carboxylate, Pb(OC(O)(CH2)3OEt)2, were prepared by the reaction between Pb(OAc)2 and corresponding alkoxyalkyl-substituted β-diketonates, and they were found to have a viscous liquid phase. The nature of the head (β-diketonate or carboxylate) or tails and substituents of β-diketonates appeared not to be important for the formation of the liquid phase. It is worth mentioning that Pb(OAc)2, which has limited use due to its low solubility, was successfully adopted as a starting material for the preparation of new lead complexes. Easy hydrolysis, reaction with HCl, and 13C NMR spectra indicated that tail portions were not coordinated to the metal as a copper derivative, Cu(t-BuC(O)CHC(O)(CH2)3OMe)2. All these complexes were not volatile enough for the MOCVD experiments, but a methyl derivative, Pb(MeC(O)CHC(O)(CH2)3OEt)2, showed some sublimation. The methoxy derivative, Pb(MeOC(O)CHC(O)(CH2)3OEt)2, was thermally unstable due to possible equilibrium between species coordinating with a keto oxygen atom and an ethereal atom of a methoxy group, which was confirmed by IR and 13C NMR spectra.

• 공업화학
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• 제4권4호
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• pp.785-790
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• 1993

키틴의 글루코오스 단위에 메탄술폰산 존재하에서 아세트산 무수물, 프로피온산 무수물과 n-부틸산 무수물을 반응시켜 아세틸 키틴(AC), 프로피오닐 키틴(PC) 그리고 n-부티릴 키틴(BC) 등의 에스테르 형태를 갖는 개질화 키틴을 합성하였고 이들의 구조를 FT-IR과 solid state CP/MAS $^{13}C-NMR$ spectra로 확인하였다. 에스테르 형태의 키틴유도체는 대체로 키틴의 글루코오스 단위의 6번 탄소위치에 치환되었다. 유도체를 유기용매와 수용성 약산 유기용매에서 용해성을 검토하여 포름산에서 세 가지 유도체 모두 좋은 용해성을 나타냈고, 수용성 약산에서는 대부분의 유도체는 팽윤되는 것을 고찰할 수 있었다.