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문미연 ( Mi Youn Moon ),백종석 ( Jong Seok Baik ),김상숙 ( Sang Suk Kim ),장원정 ( Won Jung Jang ),김미선 ( Mi Sun Kim ),이남호 ( Nam Ho Lee ) 대한화장품학회 2009 대한화장품학회지 Vol.35 No.3
개가시나무 가지의 에탄올 추출물에서 항산화활성을 관찰하였으며, 활성성분을 규명하기 위한 연구를 진행하였다. 그 결과, 4종류의 화합물을 분리하여 동정하였다. 분리 동정된 성분은 catechin(1), epi-catechin(2), tyrosol(3) 및 tiliroside(4)이다. 분리 성분의 항산화활성은 DPPH 라디칼 및 superoxide 음이온 라디칼 소거활성을 이용하여 측정하였다. 화합물 1, 2, 3, 4는 100 μL/mL 농도에서 각각 94.2 %, 93.4 %, 33.6 %, 11.2 %의 DPPH 라디칼 저해활성을 나타내었다. 또한, 화합물 1, 2, 3, 4는 200 μL/mL 농도에서 각각 60.2 %, 35.1 %, 20.6%, 4.5 %의 superoxide 음이온 라디칼 저해활성을 나타내었다. 화합물 1 ∼ 4는 개가시나무에서는 처음으로 분리된 물질이다. Investigation of antioxidative constituents from the ethanol extract of Quercus gilva branches led to the identification of four compounds; catechin (1), epi-catechin (2), tyrosol (3) and tiliroside (4). The antioxidative activity was examined using DPPH radical and superoxide anion radical scavenging method. The isolated compounds 1, 2, 3 and 4 exhibited 94.2 %, 93.4 %, 33.6 % and 11.2 % scavenging activities respectively against DPPH radicals at the concentration of 100 μL/mL. As well, the compounds 1 ∼ 4 showed respectively 60.2 %, 35.1 %, 20.6 %, 4.5 % inhibition activities against superoxide anion radicals at 200 μL/mL. Interestingly, the compounds 1 ∼ 4 were isolated for the first time from Quercus gilva Blume.
진구성 월상골 전방 탈구에서 발생한 수지 굴곡건의 다발성 파열과 압박 신경병증
박정현(Jung Hyun Park),강홍제(Hong Je Kang),백종석(Jong Seok Baik) 대한정형외과학회 2015 대한정형외과학회지 Vol.50 No.4
월상골 주위 탈구는 매우 드물게 발생한다. 진구성 월상골 주위 탈구는 6주 이후에 진단된 경우를 말하며 외상성 관절염을 비롯하여 다양한 합병증이 발생하며 정중신경 압박 신경병증을 유발하기도 한다. 이 중 진구성 월상골 주위 탈구에서 이차적으로 발생한 수지굴곡건의 다발성 파열은 매우 드물게 보고되고 있으며 전 세계적으로 3예가 보고되었으나 아직 국내 문헌에서는 보고된 적이 없다. 이에 저자들은 62세 남자에서 발생한 진구성 월상골 주위 탈구에서 전방 탈구된 월상골에 인하여 이차적으로 발생한 수지 굴곡건의 다발성 파열과 정중 신경 및 척골 신경 마비를 경험하였기에 문헌 고찰과 함께 보고하고자 한다. Perilunate dislocation represents approximately 3% of all carpal injuries and is diagnosed late in 25% of cases. Neglected perilunate dislocation accompanies many complications. Multiple flexor tendon rupture is a very rare complication of neglected perilunate dislocation. Three cases have been reported in the English literatures. No case has been reported in Korean literature. We report on a case of multiple flexor tendon ruptures with compressive neuropathy of median and ulnar nerve caused by neglected volar perilunate dislocation.
제주산 우뭇가사리(Gelidium amansii )로부터 DMSO 추출과 EDTA 수세법에 의한 상용화 아가로스 제조
강태환 ( Tai Hwan Kang ),이승홍 ( Seung Hong Lee ),백종석 ( Jong Seok Baik ),강병식 ( Byung Sik Kang ),이정석 ( Jung Suck Lee ),이남호 ( Nam Ho Lee ),전유진 ( You Jin Jeon ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.6
Agar was prepared from Gelidium amansii collected from Jeju Island, South Korea. This agar preparation has high gel strength and low sulfate content compared with G. amansii agar from Morocco. Accordingly, agarose was made from the Jeju agar through the consecutive refining processes of dimethyl sulfoxide (DMSO) extraction and ethylene diamine tetra acetic acid (EDTA) washing. The physicochemical properties of the resulting agarose were compared with those from agarose prepared using only DMSO extraction. Consecutive DMSO extraction and EDTA washing more strongly affected the physicochemical properties of the agarose (purified agarose) compared with the use of DMSO extraction alone. These properties were similar to those of commercial agarose used for electrophoresis. In DNA electrophoresis, the separation and movement speed of the purified agarose were similar to those of the commercial agarose. In a 13C NMR analysis, the purified agarose exhibited the same carbon peak as the commercial agarose. When observed under scanning electron microscopy, the agar had an even and smooth surface without irregularities or pores, and the purified agarose had a wide surface area with a large number of pores; the commercial agarose had an irregular surface that would allow the solvent to easily permeate. These results illustrate that the physicochemical properties of agarose prepared from DMSO extraction and EDTA washing were more effective than those observed after DMSO extraction alone; thus, these processes used in succession will be useful in agarose industries.
변종철,한충훈,이남호,백종석 濟州大學校 基礎科學硏究所 2001 基礎科學硏究 Vol.14 No.2
diamine류 { ethylenediamine, 1,3-propanediamine, 2,2-dimethyl-1,3-propanediarnine, o-phenyle-nediamine}와 aldehydes { salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-dichloro- salicylaldehyde, 3,5-di-tert-butyl-2-hydroxybenzaldehyde}를 methanol#액에서 축합반응시켜 네 자리 salen형 리간드(H₂L_(acn);n=1-11)를 합성하였다. 이들 리간드의 toluene(또는 methanol) 용액에 Mn(OAc)₂·4H₂O methanol용액을 첨가하고, 공기를 주입시켜[Mn(L_(acn))Cl] 착물을 얻었다. 이들 리간드 및 착물들은 원소분석, 전도도 및 NMR, IR, UV-VIS 분광학법을 이용하여 확인·고찰하였다. A series of tetradentate salen-type ligands(L_(ac)) were been prepared by condensation of diamines { ethylenediamine, 1,3-propanediamine, 2,2-dimethyl-1,3-propanediamine, and o-phenylenediamine} and aldehydes {salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-di-chlorosalicylaldehyde, and 3,5-di-tert-butyl-2-hydroxybenzaldehyde} in methanol. These [Mn(L_(ac))Cl] complexes were synthesized from the reaction of toluene(or methanol) of L_(ac) with methanol solution of Mn(OAc)₂·4H₂O in the presence of air. These ligands and complexes were characterized and confirmed by elemental analysis, conductivity, NMR, IR, and UV-VIS spectroscopy.
Trapping of the Dichlorocarbonyl Oxide Using a Chiral (Salen)Mn(Ⅲ) Complex
Baik, Jong Seok,Han, Sung-bin,Lee, Nam Ho 濟州大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.10 No.1
Carbonyl oxides 1 have long been established as key intermidiates in the ozonolusis of olefins. These oxides are also known to be generated by treatment of oxygen to the carbene species. The intermediacy of 1has been extensively characterized in terms of direct spectroscopic observation as well as theoretical calculation. Much attention has been devoted to study the reaction of the elusive intermediate 1, including the cycloaddition with carbon1 compounds to give trioxolane adducts. In addition, they may transfer an oxygen atom to organic substrates such as alkanes, alkenes, arenes, and sulfoxides.
산소분자와 NaBH₄를 이용한 (살렌)망간(Ⅲ) 착물 촉매 하의 올레핀 산화반응의 메카니즘에 대한 연구
이남호,백종석,변종철,한충훈,한성빈 濟州大學校 基礎科學硏究所 2000 基礎科學硏究 Vol.13 No.1
The mechanism of (salen)Mn(III)-catalysed olefin oxygenation to the alcohol in the presence of NaBH₄ was investigated. In the case of styrene, the oxidation proceeds through acetophenone to phenethyl alcohol, which was proved using NaBH₃CN as reducing agent. The overall catalytic cycle was suggested to invlove Mn(+2) and Mn(+3) species rather than Mn(+5) oxo intermediate. In addition, hydride radical and peroxo radicals are considered to play a pivot role in this oxygenation system.
NaBH₄존재 하에서 망간(Ⅲ)아세테이트를 촉매로 이용한 올레핀의 산소화반응
이남호,백종석,한성빈 濟州大學校 基礎科學硏究所 2003 基礎科學硏究 Vol.16 No.2
산소를 산화제로 이용하여 올레핀을 알콜로 산화하는 방법에서 (schiff-base)망간(Ⅲ) 착물 대신에 Mn(OAc)₃·2H₂O 염이 촉매로 사용되었다. 이 반응에서 NaBH₄가 hydride 소스로 사용되었다. 이 반응에서 외부 리간드로 사용된 schiff-base가 매우 중요함을 알 수 있었다. (Schiff-base)Mn(Ⅲ) complex has been used as the catalyst for the olefin oxygenation under O₂/NaBH₄ combination system. In this study, Mn(OAc)₃·2H₂O salt was used as the catalyst. Proper choice of external Schiff-base ligand as critical to achieve the effective oxidation.