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성민규,조윤기,박창식,성낙도 한국동물생명공학회(구 한국동물번식학회) 2008 Reproductive & developmental biology Vol.32 No.3
돼지 페르몬성 냄새 물질을 탐색하기 위하여 tetrahydrofuran-2-yl 계 화합물들과 관측된 결합 친화력상수(Obs.p[Od]50) 사이의 정량적인 구조-활성관계(QSAR)로부터 4개 형태의 모델(2D-QSAR, HQSR, CoMFA 및 CoMSIA)들이 유도되었다. Ligand based approache로부터 최적화된 CoMFA 모델(예측성; r2cv.(q2)=0.886 및 상관성 r2RCV 0.984)이 가장 좋은 모델이었다. CoMFA 모델로부터 돼지 페르몬성 냄새 물질로 예측된 N1-allyl-N2 -(tetrahydrofuran-2-yl)methyl) oxalamide (P1), 2- (4-trimethylammoniummethylcyclohexyloxy)tetrahydrofurane (P5) 및 2- (3-trimethylammonium-methylcyclohexyloxy)tetrahydrofurane (P6) 분자들은 비교적 높은 결합 친화력 상수값(Pred.p[Od]50) =8~10)과 몇 가지 독성에 대하여 낮은 독성간을 나타내었다. To search a new porcine pheromonal odorant, the models of four type (2D-QSAR, HQSAR, CoMFA & CoMSlA) were derived from quantitative structure-activity relationship (QSAR) between tetrahydrofuran-2-yl family compounds and their observed binding affinity constants (Obs.p[Od]50). The optimized CoMFA model (predictability; r2cv.(q2)=0.886 & correlation coefficient r2RCV =0.984) from ligand based approaches was confirmed as the best model among them. The N1-allyl-N2 -(tetrahydrofuran-2-yl)methyl)oxalamide (P1), 2-(4-trimethylammoniummethylcyclohexyloxy)tetrahydrofurane (P5) and 2-(3-trimethylammoniummethylcyclohexyloxy)tetrahydrofurane (P6) molecules predicted as porcine pheromonal odorant by the CoMFA model were showed relatively high binding affinity constant values (Pred.p[Od]50) =8~10) and very lower toxicity values against some sorts of toxicity.
박창식,송석오,임재삼,성민규,성낙도 한국동물생명공학회(구 한국동물번식학회) 2009 Reproductive & developmental biology Vol.33 No.1
To search a new pig pheromonal odorant, the N1-allyl-N2-(tetrahydrofuran-2-ylmethyl)oxalamide molecule predicted by ligand based approach and molecular docking method was synthesized by nucleophilic addition-elimination reaction (AdNU-E) between N-allyloxalamic acid ethylester and tetrahydrofurylmethylamine. According to the evaluation results for efficiency of pig estrus control, the synthesized pig pheromonal N1-allyl-N2-(tetrahydrofuran-2- ylmethyl)oxalamide molecule advanced the estrus by 11.3 days (p<0.05) compared with the non-pheromone group. And from these results, it is predicted that the synthesized pig pheromonal compound will be able to increase the reproduction efficiency of pig.
Wei Jiang,Guosong Ni,Pingping Zuo,Shijie Qu,Yunmei Li,Hongxian Niu,Wenzhong Shen 한국탄소학회 2019 Carbon Letters Vol.29 No.5
Isotropic pitch-based carbon fiber was successfully prepared from tetrahydrofuran-soluble fraction of coal tar pitch cocarbonization with petrolatum by air-blowing. The effects of reaction temperature and time, amount of petrolatum added on the composition and spinning properties of resultant pitches were investigated. It indicated that petrolatum could effectively improve the softening point, aromaticity, hydrogen content and molecular weight of the resultant pitches by promoting cross-linking and dehydrogenation polymerization reactions at low air-blowing temperature. Moreover, more aliphatic and naphthenic structures had been introduced into resultant pitches as addition of petrolatum and also inhibited the generation of quinoline-insoluble particles. The obtained green fibers were facile to be stabilized and carbonized and the resultant carbon fibers showed fully isotropic and finer, uniform diameter with smooth surface and higher tensile strength of up to 0.92 GPa. It provided a facile chemical modification method for isotropic pitch-based carbon fiber production.
고체 추진제용 폴리우레탄 바인더를 위한 새로운 폴리에테르 공중합체 디올(HTPE)의 합성
신범식(Bum-Sik Shin),이범재(Bum-Jae Lee),유호준(Ho-Joon You),박영철(Young-Chul Park) 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.5
Hydroxy-terminated polyether의 새로운 합성방법인 양이온 개환 공중합에 의해서 Ethylene oxide와 Tetrahydrofuran을 공중합 하였다. 중합은 1,4-Butandiol 존재 하에 BF3.THF를 촉매로 반응이 진행되어 잘 제어된 Polyetherdiol을 합성할 수 있었다. Polyurethane 반응은 Polyetherdiol과 경화제로써 I-PDI/N-100 혼합물을 사용하였고, 경화촉매로 TPB/MA 혼합물을 사용하여 합성하였다. 이렇게 합성된 Polyurethane은 현재 미국에서 시판중인 ATK HTPE를 이용한 Polyurethane과 기계적 특성과 경화 거동을 비교 분석하였다. Novel synthetic routes were proposed for hydroxy-terminated Poly(EO-co-THF) by Cationic ring-opening copolymerization of Tetrahydrofuran(THF) and Ethylene oxide(EO). It was carried out using Boron trfluoride tetrahydrofuranate(BF3?THF complex) as catalyst in the presence of 1,4-butandiol. The resultant products are well-defined linear polyetherpolyol. Polyurethane(TPU) were prepared using resultant polyetherpolyol with IPDI/N-100 as curing agent and TPB(Triphenylbismuth) /MA(Maleic anhydride) mixture as cure catalyst. Mechanical properties of TPU prepared from poly(EO-co-THF) polyol were investigated and compared with polyurethane using ATK HTPE
Jiang Wei,Ni Guosong,Zuo Pingping,Qu Shijie,Li Yunmei,Niu Hongxian,Shen Wenzhong 한국탄소학회 2019 Carbon Letters Vol.29 No.5
Isotropic pitch-based carbon fiber was successfully prepared from tetrahydrofuran-soluble fraction of coal tar pitch co-carbonization with petrolatum by air-blowing. The effects of reaction temperature and time, amount of petrolatum added on the composition and spinning properties of resultant pitches were investigated. It indicated that petrolatum could effectively improve the softening point, aromaticity, hydrogen content and molecular weight of the resultant pitches by promoting cross-linking and dehydrogenation polymerization reactions at low air-blowing temperature. Moreover, more aliphatic and naphthenic structures had been introduced into resultant pitches as addition of petrolatum and also inhibited the generation of quinoline-insoluble particles. The obtained green fibers were facile to be stabilized and carbonized and the resultant carbon fibers showed fully isotropic and finer, uniform diameter with smooth surface and higher tensile strength of up to 0.92 GPa. It provided a facile chemical modification method for isotropic pitch-based carbon fiber production.
성낙도,박창식,정훈성,성민규 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10
생물학적 자극통제 수단으로 활용하기 위한 돼지 웅성 페르몬성 분자를 탐색하고자 일련의 냄새 분자로서 2-(cyclo-hexyloxy) tetrahydrofurane 유도체들의 정량적인 구조와 수용체인 porcine odorant binding protein (pOBP)간의 결합 친화력 상수(p(Od)_(50))에 대한 비교 분자장 분석(CoMFA)을 실행하였다. 가장 양호한 CoMFA 모델 ATV (r²_(cv.)(q²)=O.886 및 r²(ncv.)=0.984)은 기질 분자 내 입체 중심(chiral center)의 절대 배열이 C₁(R),C₂(S)인 분자를 atom based fit 방법으로 배열하였을 경우의 standard field와 indicator field가 조합된 CoMFA장의 조건에서 유도되었다. 이 CoMFA 모델은 입체장 40.8%,정전기장 14.6% 및 소수성장 44.6%가 결합 친화력 상수에 영향을 미치는 요소임을 나타내었다. 등고도의 분석 결과로부터 효과적인 결합 친화력 냄새 분자를 수식하는 데 몇 가지 가치 있는 정보를 얻을 수 있었다. To search of new porcine pheromonal odorants for biostirnulation control system technologies to improve reproductive efficiency in livestock species, the comparative molecular field analysis (CoMFA) for binding affinity constant (p(Od)_(50)) between porcine odorant binding protein (pOBP) and ligands of odorant 2-(cyclohexyloxy) tetrahydrofurane derivatives as substrate molecule was conducted and discussed. In the optimized CoMFA model AIV with chirality (C₁'(R), C₂(S)) in substrate molecule and atom based fit alignment (A) of odorants, the statistical results showed the best predictability of the binding affinities (p(Od)_(50)) based on the LOO cross-validated value r²_(cv.) (q²=O.886) and non-cross-validated conventional coefficient (r²_(ncv.)=O.984). The binding affinity constants exhibited a good correlation with steric (40.8%), electrostatic (14.6%) and hydrophobic (44.6%) factors of the substrate molecules. From the analytical results of the contour maps, which may give us some valuable informations to the modification of odorants for effective binding affinity.
Rizwan Hussain,Mohd Quasim Khan,Asif Ali Khan 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-
A novel Poly-1-napthylamine-titanium(IV)sulphosalicylophosphate (PNA-TSP) cation exchange nanocompositewas synthesized by in-situ chemical oxidative polymerization of 1-naphthylamine in thepresence of titanium(IV)sulphosalicylophosphate (TSP) nanoparticles. PNA-TSP doped with silvernanoparticles was synthesized by chemical reduction method. Synthesis of PNA-TSP and Ag/PNA-TSP wasconfirmed by FTIR, FE-SEM, XRD, TGA and EDX characterization techniques. Nanocomposite showedgood ion-exchange capacity (IEC) (2.20 meq g 1) and enhanced DC electrical conductivity from 0.163 S/cm (PNA-TSP) to 0.7112 S/cm (Ag/PNA-TSP). Ag/PNA-TSP nanocomposite based sensor was fabricated forthe detection of tetrahydrofuran vapours over the concentration range from 0.1 M (vapour concentration2.90%) to 0.7 M (vapour concentration 4.24%) tetrahydrofuran solution.
성낙도,박창식,정훈성,성민규 한국동물번식학회 2006 Reproductive & developmental biology Vol.30 No.1
생물학적 자극통제 수단으로 활용하기 위한 돼지 웅성 페르몬성 분자를 탐색하고자 일련의 냄새 분자로서 2-(cyclo-hexyloxy) tetrahydrofurane 유도체들의 정량적인 구조와 수용체인 porcine odorant binding protein (pOBP)간의 결합 친화력 상수(p(Od)50)에 대한 비교 분자장 분석(CoMFA)을 실행하였다. 가장 양호한 CoMFA 모델 AIV (r2 cv.(q2)=0.886 및 r2 ncv.=0.984)은 기질 분자 내 입체 중심(chiral center)의 절대 배열이 C1(R),C2(S)인 분자를 atom based fit 방법으로 배열하였을 경우의 standard field와 indicator field가 조합된 CoMFA장의 조건에서 유도되었다. 이 CoMFA 모델은 입체장 40.8% 정전기장 14.6%및 소수성장 44.6%가 결합 친화력 상수에 영향을 미치는 요소임을 나타내었다. 등고도의 분석 결과로부터 효과적인 결합 친화력 냄새 분자를 수식하는 데 몇 가지 가치 있는 정보를 얻을 수 있었다. To search of new porcine pheromonal odorants for biostimulation control system technologies to improve reproductive efficiency in livestock species, the comparative molecular field analysis (CoMFA) for binding affinity constant (p(Od)50) between porcine odorant binding protein (pOBP) and ligands of odorant 2-(cyclohexyloxy) tetrahydrofurane derivatives as substrate molecule was conducted and discussed. In the optimized CoMFA model AIV with chirality (C1'(R), C2(S)) in substrate molecule and atom based fit alignment (A) of odorants, the statistical results showed the best predictability of the binding affinities (p(Od)50) based on the LOO cross-validated value r2 cv.(q2=0.886) and non-cross-validated conventional coefficient (r2 ncv.=0.984). the binding affinity constants exhibited a good correlation with steric (40.8%), electrostatic (14.6%) and hydrophobic (44.6%) factors of the substrate molecules. from the analytical results of the contour maps, which may give us some valuable informations to the modification of odorants for effective binding affinity.