• Journal of Animal Science and Technology
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• 제45권6호
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• pp.939-948
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• 2003

본 연구는 돼지의 염색체 6번에 존재하는 주요 경제형질에 관여하는 양적형질 유전자좌위(Quantitative trait loci; QTL)를 밝히기 위하여 초위성체 마커를 이용하여 유전자지도를 작성하였다. 기준집단의 조성은 재래돼지 수컷 5마리와 Landrace 암컷 9마리를 자연교미하여 생산된 F$_1$의 동복 자손별로 수컷 1두를 임의적으로 선발하여 암컷 2두 이상과 전형매 교배시켜 F$_2$ 240두를 생산하였고 QTL 분석에는 F$_2$ 183두만을 이용하였다. 기준집단의 표현형 성적은 3주령체중, 등지방두께, 도축 24시간 후의 pH, 전단력, 조단백질 함량 등을 조사 분석하였다. F$_2$ 집단은 재래돼지와 Landrace의 두 종의 평균성적을 갖고 있었으며, 개체간 표현형적 변이가 매우 높아서 경제형질과 연관된 QTL을 탐색하기 적절한 기준집단이라고 평가되었다. 연관지도는 29개의 초위성체 마커와 1개의 PCR-RFLP 마커(AMPKα2)를 이용하여 작성하였으며, 연관지도상의 염색체 길이는 169.3cM이었고, 마커간 평균 간격은 6.05cM이었다. 염색체 6번에서 경제형질과 연관된 유의적인 QTL은 모두 5개가 탐색 되었다. 3주령 체중과 연관된 QTL이 5cM 위치에서 탐색되었으며, 전단력, 도축 24시간 후 pH, 등지방두께, 조단백질 함량 등의 육질관련 QTL이 서로 다른 위치에서 5% 수준의 통계적 유의성이 확인되었다.

• 한국염색가공학회지
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• 제13권4호
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• pp.272-281
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• 2001

Shrink resist finishing of wool fabric was carried out with MONAMIN BTN shrink resist agent after chlorination with D.C.C.A.(dichloro isocyanuric acid). The purpose of this study is to investigate the effect of treating conditions, such as concentrations of D.C.C.A and MONAMIN BTN, pH of treating bath, dying times, curing times and temperatures, on shrink resist finishing. Mechanical properties of the treated fabric were measured by KES-FB system. The optimum chlorination of wool corresponds to 2∼3%(o.w.f.) of D.C.C.A. without rendering the damage on surface of wool fiber. Also it seems likely that the shirink resist finishing carried out at 2 ∼3%(o.w.f.) of MONAMIN BTN and pH 7∼8 of treating bath is effective in increasing a softness of hand.

• 한국표면공학회지
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• 제44권2호
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• pp.50-54
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• 2011

Hydrophobic a-C:F film was coated on polycarbonate film with $CF_4$, $C_2F_6$ and HFC ($C_2F_4H_2$) gas in helium discharge generated by 5~100 kHz AC power supply at atmospheric pressure and room temperature. The highest water contact angle of the a-C:F film formed with $He/C_2F_6$ mixed gas is $155^{\circ}$. X-ray photoelectron spectrum showed that there was 40% of C-$CF_3$ bond at the surface of the super hydrophobic film. The contact angle and deposition rate were decreased with increasing substrate temperature. The contact angle was generally increased with the surface roughness of the film. The contact angle was high when the surface microstructure of the film was fine and sharp at the similar roughness and chemical composition of the surface.

• 한국결정학회지
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• 제3권2호
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• pp.67-71
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• 1992

The crystal structure of the title compound was determined from single crystal X-ray dirt fraction study : C16H16NO3, Mr=271.316, orthorh ombic, Aba2, a=15.750(3), b=13.470(2), c=13.356 (2) A, V=2833A, Z=8, Dx=1.26 Mgm-3, λ(MoK a) =0.71069A, r=0.51mm-2, F(000)=1136, T=291 K, R=0.0414 for 728 unique observed [F≥3e(F)] reflections and 240 parameters. The molecule is nearly planar within 0.2 A with the torsion angle -179(2)°for C(4)-C(7)-C(8)-C(9).The into rmolecular interactions are mainly by van der Waals force with the nearest intermolecular distance 3.647A between O(3) and C(4) translated by half unit along band c-axes.

• 한국균학회지
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• 제10권2호
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• pp.67-73
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• 1982

2% CMC (Carboxymethyl cellulose)를 탄소원으로 하여 $28^{\circ}C$에서 8일간 배양한 도열병균 (Pyriculariaoryzae, $C-7^{+t}$)의 배양액을$(NH_4)_2SO_4$ 염석, Sephadex G-150 및 DEAE-Sephadex A-25 column chromatography를 거쳐 순화하였다. 순화결과 $F_1,\;F_2,\;F_3$ 3개의 CMCase $(C_x)$, 1개의 Avicelase $(C_1)$ 및 1개의 ${\beta}-glucosidase$를 얻었는데 그중 $C_1$ 효소의 $F_3$만을 골라 실험을 계속했다. 이 효소의 활성도는 pH 6.0 과 $40^{\circ}C$에서 가장 높았으며 $40^{\circ}C$까지 안정한 효소인 것을 알 수 있었다. 이 효소의 Km과 Vmax값은 각각 $2.8{\times}10^{-3}mM$, 5.9 mmoles/hour이었고, 분자량은 Sephadex G-150 column chromatography에 의해 약 80,000으로 나타났다. 약 7배로 순화된 이 효소의 순화정도를 polyacrylamide gel electrophoresis에 의해 검증한 결과 1개의band를 나타냈다.

• 한국미생물·생명공학회지
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• 제23권5호
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• pp.624-631
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• 1995

The fermentation characteristics of Saccharomyces cerevisiae F38-1, a newly isolated thermotolerant yeast strain from a high temperature environment have been studied using a fermentation medium containing 20% glucose, 0.2% yeast extract, 0.2% polypeptone, 0.3% (NH$_{4}$)$_{2}$SO$_{4}$, 0.1% KH$_{2}$PO$_{4}$, and 0.2% MgSO$_{4}$ without shaking at 30$\circ$C to 43$\circ$C for 5 days. The fermentability was over 90% at 30$\circ$C, 88% at 37$\circ$C, 77% at 40$\circ$C and 30% at 43$\circ$C. A similar fermentation result was obtained at pH between 4 and 6 at 30$\circ$C and 40$\circ$C. Aeration stimulated the growth of the strain at the beginning of the fermentation, but it reduced alcohol production at the end of alcohol fermentation. Optimal glucose concentration was determined to be between 18 and 22% at 40$\circ$C as well as 30$\circ$C, but the growth was inhibited at the glucose concentration of over 30%. A fermentability of over 90% was observed at 40$\circ$C in 2 days when the medium was supplemented by 2% yeast extract. A higher inoculum size increased the initial fermentation rate, but not the fermentation. A fermentability of over 90% was achieved in 2 days at 40$\circ$C in a fermentor experiment using an optimized medium containing 20% glucose and 1% yeast extract.

• 한국결정성장학회지
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• 제24권4호
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• pp.140-144
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• 2014

Co(0.7 wt%)와 Pr(2.0, 3.5 및 5.0 wt%)이 첨가된 큐빅지르코니아($ZrO_2:Y_2O_3=50:50wt%$) 단결정을 스컬용융법으로 성장 후 $N_2$ 분위기에서 $1150^{\circ}C$로 5시간 동안 열처리 하였다. 갈색의 단결정들은 각각 어두운 갈녹색, 녹청색 또는 밝은 녹색으로 변화되었다. 열처리 전 후의 YSZ 단결정들을 직경 7.5, 두께 3 mm의 웨이퍼로 연마 하여 UV-VIS 분광광도계 및 XRD(X-ray diffraction)로 광학적 또는 구조적 특성 분석을 행하였다. $Co^{2+}$(약 589 nm: ${\Gamma}_8[^4A_2(^4F)]{\rightarrow}{\Gamma}_8+{\Gamma}_7[^4T_1(^4F)]$, 약 610 nm: ${\Gamma}_8[^4A_2(^4F)]{\rightarrow}{\Gamma}_8[^4T_1(^4F)]$, 약 661 nm: ${\Gamma}_8[^4A_2(^4F)]{\rightarrow}{\Gamma}_6[^4T_1(^4F)]$ 및 $Pr^{3+}$(약 450 nm: ${^3}H{_4}-{^3}P{_2}$, 약 473 nm: ${^3}H{_4}{\rightarrow}{^3}P{_1}$, 약 484 nm: ${^3}H{_4}{\rightarrow}{^3}P{_0}$)에 의한 흡수, 이온화에너지 및 격자상수 변화를 확인하였다.

• Bulletin of the Korean Chemical Society
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• 제14권2호
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• pp.266-271
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• 1993

The reaction of $(CO_5$)M=C(OMe)Tol (M=Cr, Mo, W and $Tol=p-C_6H_4Me)$ and $BBr_3$ followed by treatment with tetramethylethylenediamine (TMEDA) yields a mixture of two diastereomers, trans, $cis-Br(CO)_2(tmeda)M{\equiv}$CTol [M=Cr(1a), Mo(2a), W(3a)] and cis, $trans-Br(CO)_2(tmeda)M{\equiv}$CTol [M=Cr(1b), Mo(2b), W(3b)], respectively. These compounds have been isolated as crystalline solids and characterized by spectroscopic (infrared, mass, $^1H$ and $^{13}C-NMR)$ data. The trans, cis-Br(CO)2(tmeda)Cr${\equiv}$CTol (1a), has been examine via a single crystal X-ray diffraction study : $BrCrO_2N_2C_{16}H_{23}$, Mr=407.27, triclinic, $P{\bar{1}},\;a=12.792(2),\;b=13.400(5),\;c= 11.645(4)\;{\AA},\;{\alpha}=101.26(2)^{\circ},\;{\beta}=103.04(2)^{\circ},\;{\gamma}=91.88(2)^{\circ},\;{\nu}=1907(1){\AA}^3,\;Z=2,\;{\rho}(calcd)=1.418\;gcm^{-3},\;{\lambda}(MoK{\alpha})=0.71069\;{\AA},\;{\mu}=26.25 cm^{-1},\;F(000)=831.97,\;T=295K,\;R=0.0977$ for 1332 significant reflections $[F_0>5{\sigma}(F_0)]$. There are two essentially equivalent molecules in the crystallographic asymmetric unit. Each molecule is octahedral with the bromide ligand trans to the alkylidyne carbon, the two cis-carbonyl ligands, and the bidentate TMEDA ligand.

• Bulletin of the Korean Chemical Society
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• 제35권11호
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• pp.3205-3208
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• 2014

Catalytic gasification of cellulose was carried out in a U-type fixed reactor with Ni loaded MSU-F catalyst (Ni/MSU-F) and Ni loaded ${\gamma}-Al_2O_3$ (Ni/${\gamma}-Al_2O_3$). The characteristics of the catalysts were analyzed by using X-ray diffraction, $H_2$-temperature programmed reduction, and Brunauer-Emmett-Teller analyses. The operation conditions of catalytic gasification reactions were $750^{\circ}$ and 0.2 equivalence ratio. Air was used as gasification agent. Catalytic gasification characteristics, such as gas yield and gas composition ($H_2$, CO, $CO_2$, $C_1-C_4$), were measured and calculated. The gas yield of Ni/MSU-F was much higher than that of Ni/${\gamma}-Al_2O_3$. Especially high amount of hydrogen was produced by Ni/MSU-F.

• 센서학회지
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• 제13권3호
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• pp.182-187
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• 2004

The fluorinated amorphous carbon thin films (a-C:F) were deposited by PECVD(plasma enhanced chemical vapor deposition). The precursors were $C_{4}F_{8}$ which had a similar ratio of target film's carbon to fluorine ratio, and $Si_{2}H_{6}$/He for capturing excessive fluorine ion. We varied deposition condition of temperature and working pressure to survey the effect of each changes. We measured dielectric constant, composition, and etc. At low temperature the film adhesion to substrate was very poor although the growth rate was very high, the growth rate was very low at high temperature. The EDS(energy dispersive spectroscopy) result showed carbon and fluorine peak for films and Si peak for substrate. There was no oxygen peak.