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黃正儀,鄭倧在,朴龍泰,池鍾基,박은숙 慶北大學校 物理化學硏究所 1984 硏究論文集 Vol.5 No.-
Anilinium ion, o-toluidinium ion, phenol 및 o-chorophenol의 해리상수를 10∼40℃ 온도범위와 1∼2000 bar의 압력범위에서 분광광도법으로 측정하였다. phenols에서는 일반적인 약산에서처럼 온도와 압력이 증가할수록 해리상수가 증가하였으나 anilinium ions의 해리상수는 온도가 증가할수록 증가하였고, 압력이 증가할수록 감소하였다. 해리상수의 압력의 효과는 해리반응시의 하전의 증감으로 설명된다. 즉 phenols와 같이 하전이 증가하는 산은 압력이 증가할수록 해리상수가 증가하나 anilinium ions와 같이 하전의 증감이 없으면 해리상수는 감소한다. 이들 해리상수값에서 열역학적 파라미터, ΔH˚, ΔG˚, ΔS˚, ΔV˚ 및 β를 계산하고 해리반응의 성질을 고찰하였다. The dissociation constants of anilinium ion, o-toluidinium ion, phenol and o-chlorophenol were measured spectroscopically in aqueous solution over the temperature range of 10∼40℃ and at the pressures up to 2,000 bars. The effects of temperature and pressure on the dissociation of the phenols are the same as those of the ordinary weak acids. Meanwhile the dissociation constants of anilinium ions are increased with temperature raising and decreased with pressure elevation. The effects of pressure on the constants can be explained by taking account of change of charge during dissociation reaction; there are increase in charge in the dissociation of phenols but anilinium ions are not. Several thermodynamic properties, ΔH˚, ΔG˚, ΔS˚, ΔV˚ and β are calculated from those constants, and the dissociation reactions are discussed by item.
황정의,차성극,박의환 慶北大學校 物理化學硏究所 1982 硏究論文集 Vol.3 No.-
2-염화 및 2-수산화피리딘의 해리상수를 몇 가지 온도에서 압력을 1∼2,500bar까지 변화시키면서 측정하였다. 측정은 수용액중에서 행하였으며 전도도법으로 측정하였다. 해리상수는 두 가지 치환피리딘 모두 온도나 압력이 높아지면 증가하였다. 이들 해리상수값에서 열역학적 성질을 계산하였으며 이들 결과에서 해리 반응은 하전분리가 크지 않은 반응임을 알았으며 상대적 해리상수 K_p/K_1은 약 2정도이고 보통 약전해질의 3∼4배보다 작은 값을 나타내었다. The ionization constants of 2-Chlor-and 2-hydroxypyridine in aqueous solution wene neasured in the pressure range, to 2500bars and at soveral temperature 20 to 40℃ by the methood of conductivity. The constants were increased as the both temperature and pressure. From the ionization constants various thermodynomics were also calculated. Refering to the data it is aes mates that the ionization reaetion proceed no many charge repation. Therefore, the relative ionization constants (K_P/K_I) are not large as the ordiuary acids.
인삼,산약,한약부산물의 급여가 재래닭의 생산성에 미치는 영향
김병기,황인업,강삼순,신상희,우선창,김영직,황영현 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.3
본 연구는 경상북도 축산기술연구소에서 보유하고 있는 재래닭 160수를 공시하여 인삼부산물(잎·줄기), 산약부산물(박피후 건조껍질), 한약(달인후 찌꺼기) 부산물을 각각 5%씩 기본사료에 첨가 급여하였다. 시험기간은 부화후 8주령에 시작하여 20주령에 종료하였으며, 재래닭의 사료섭취량, 증체량, 사료요구율, 폐사율 등의 생산성에 미치는 영향을 조사하였다. 영양소 섭취량에서 건물섭취량은 대조구가 125.79g 인삼구 122.26g, 산약구 122.30g, 한약구 123.72g으로 대조구가 처리구에 비해 가장 많이 섭취하였으나 통계적 유의성은 없었다. 건물소화율은 대조구와 산약구에서 62.89% 및 61.20%로서 인삼구의 55.44%, 한약구의 59.76%보다 높았다(p<0.05). 체중변화는 전체적으로 수탉이 암탉보다 월등히 무거웠으며, 16주령에서는 대조구, 인삼구, 산약구, 한약구가 각각 1,436.6g, 1,427.2g, 1,546g, 1,442.0g로서 특히 산약구가 가장 무거웠다(p<0.05). 사료섭취량은 대조구 인삼구, 산약구, 한약구에서 각각 6,087g, 5,947g, 5,816g and 5,852g으로 대조구가 가장 높았다. 사료요구율은 전 시험기간 동안 대조구에 비해 처리구가 다소 높은 경향이었고, 특히 인삼구에서 가장 높은 결과를 나타내었다. 폐사수는 대조구에 비해 처리구에서 유의성 있게 낮은 결과를 나타내었다(p<0.05). 재래닭의 생체중, 도체중 및 각 부분육 생산량은 처리구 사이에 유의성이 없었으나, 복강지방량은 대조구와 한약구에서 산약구와 인삼구에 비해 높았다(p<0.05). This study was conducted to investigate the influence of dietary Panax Ginseng Refuse(PGR), Dioscorea Japonica Refuse(DJR) and Oriental Medicine Refuse(OMR) on performance(feed intake, body weight gain, feed conversion, mortality) of Korean Native Chicken(KNC). KNC were randomly assigned to one of the 4 dietary treatment : 1) control(commercial feed), 2) PGR(commercial feed supplemented with 5% panax ginseng leaves) 3) DJR(commercial feed with 5% dioscorea japonica hulls and 4) OMR(commercial feed with 5% oriental medicine refuse). 160 KNC were fed one of the above experimental diet for 12 weeks and slaughtered at 20 weeks of age. Daily DM intake of control, PGR, DJR and OMR diet were 125.79g, 122.26g, 122.30g and 123.72g, respectively, with no significantly difference(p<0.05). The DM utilizability of control and DJR(62.89% and 61.20%) diets were higher(p<0.05) than those of PGR and OMR(55.44% and 59.76%)(p<0.05). 16 weeks weight of bird fed control, PGR, DJR and OMR diets were 1,436.6g, 1,427.2g, 1,546g and 1,422.0g respectively with DJR being the highest than other treatments(p<0.05). Total feed intake of control, PGR, DJR and OMR diets were 6,087g, 5,947g, 5,816g and 5,852g, respectively where control was higher than other treatments. The feed conversion of PGR, DJR and OMR were higher than the control. Chicken housed mortality of control, PGR, DJR and OMR were respectively 24, 15, 13 and 20 birds with rather lower mortality in the supplented groups(p<0.05). The body weight, carcass weight and carcass yield were not different among the treatment. But abdominal fat of chicken in control and OMR groups were higher than that of DJR and PGR groups.
Hwang, B.U.,Kim, D.I.,Cho, S.W.,Yun, M.G.,Kim, H.J.,Kim, Y.J.,Cho, H.K.,Lee, N.E. Elsevier Science 2014 ORGANIC ELECTRONICS Vol.15 No.7
We investigated flexible amorphous InGaZnO (a-IGZO) thin film transistors (TFTs) on a polyimide (PI) substrate by using organic/inorganic hybrid gate dielectrics of poly-4vinyl phenol (PVP) and ultrathin Al<SUB>2</SUB>O<SUB>3</SUB>. IGZO TFTs were fabricated with hybrid PVP/Al<SUB>2</SUB>O<SUB>3</SUB> gate dielectrics having Al<SUB>2</SUB>O<SUB>3</SUB> layers of different nanoscale thicknesses, which were deposited by atomic layer deposition (ALD). The electrical characteristics of the TFTs with the organic/inorganic hybrid gate dielectrics were measured after cyclic bending up to 1,00,000 cycles at the bending radius of 10mm. The ultrathin Al<SUB>2</SUB>O<SUB>3</SUB> layer in the hybrid gate dielectrics improved the mechanical flexibility and protected the organic gate dielectric against damage during the sputter deposition of the IGZO layer. Finite elements method (FEM) simulations along with the structural characterization of the cyclically bent device showed the importance of optimizing the thickness of the Al<SUB>2</SUB>O<SUB>3</SUB> layer in the hybrid gate dielectrics to obtain mechanically stable and flexible a-IGZO TFTs.
Hwang, S.,Lee, J.,Hong, U.G.,Seo, J.G.,Jung, J.C.,Koh, D.J.,Lim, H.,Byun, C.,Song, I.K. Korean Society of Industrial and Engineering Chemi 2011 Journal of industrial and engineering chemistry Vol.17 No.1
Nickel-alumina xerogel catalysts (XNiAl) with different nickel contents (X, wt%) were prepared by a single-step sol-gel method for use in the methane production from carbon monoxide and hydrogen. The effect of nickel content on the catalytic performance of XNiAl catalysts was investigated. Conversion of CO and yield for CH<SUB>4</SUB> over XNiAl catalysts drastically increased with increasing nickel content from 20 to 40wt%, but they were almost constant at nickel content above 40wt%. This indicates that XNiAl catalysts with nickel content above 40wt% served as efficient catalysts in the methane production from carbon monoxide and hydrogen. The enhanced catalytic performance of nickel-alumina xerogel catalysts with nickel content above 40wt% was attributed to the abundant active surface nickel species caused by well-developed framework mesopores and large pore size of the catalysts. When considering the amount of nickel used for the preparation of catalyst, it is reasonable to conclude that the optimal nickel content of nickel-alumina xerogel catalyst for methanation reaction was 40wt%.