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Magnetism in Ni-W textured substrates for coated conductors
Song K. J.,Park Y. M.,Yang J. S.,Kim S. W.,Ko R. K.,Kim H. S.,Ha H. S,Oh S. S.,Park C.,Joo J. H.,Kim C. J. The Korea Institute of Applied Superconductivity a 2005 한국초전도저온공학회논문지 Vol.7 No.2
The magnetic properties of a series of both annealed (biaxially textured) and as-rolled (non-textured) Ni-xW alloy tapes with compositions x = 0,1,3, and 5 at.$\%$, were studied. Characterization methods included XRD analyses to investigate the biaxial cube texturing of the annealed Ni-W alloy tapes and studies of the magnetization M for both annealed and as-rolled Ni-W alloy tapes. Both the isothermal mass magnetizations M(H) of a series of samples at different fixed temperatures and M(T) in fixed field, employing a PPMS-9 (Quantum Design), were measured. The Ni-W alloys have shown much reduced ferromagnetism as W-content x increases. Both the saturation magnetization Msat and Curie temperature Tc decrease linearly with W-content x, and both Msat and Tc go to zero at critical concentration of Xc - 9.50 at. $\%$ W.
Yin, Q.Q.,Chang, J.,Zuo, R.Y.,Chen, L.Y.,Chen, Q.X.,Wei, X.Y.,Guan, Q.F.,Sun, J.W.,Zheng, Q.H.,Yang, X.,Ren, G.Z. Asian Australasian Association of Animal Productio 2010 Animal Bioscience Vol.23 No.2
In order to improve the availability of phytase and probiotics together, a phytase gene from Aspergillus ficuum has been expressed in Lactobacillus. In this study, the transformed Lactobacillus with phytase gene was fed to pigs to determine its effect on pig production, feed conversion and gut microbes. Forty eight, 60-day-old, castrated pigs (Duroc${\times}$Landrace${\times}$Pietrain) were assigned to 6 groups, 8 pigs for each group. Group 1 was the control, group 2 was added with chlortetracycline (500 mg/kg), group 3 was added with the transformed Lactobacillus (500 mg/kg) with 20% (w/w) of calcium monohydrogen phosphate (CMP, $CaHPO_{4}$) removed, group 4 was added with the natural Lactobacillus (500 mg/kg) with 20% (w/w) of CMP removed, group 5 was added with the transformed Lactobacillus (500 mg/kg) with 40% (w/w) of CMP removed, group 6 was added with phytase (500 mg/kg) with 40% (w/w) of CMP removed. The results showed: i) the average daily gain (ADG) was improved in groups 2, 3 and 4 (p<0.05); ii) the diarrhea rates in the groups added with Lactobacillus were lower than in the other groups (p<0.05), in which the transformed Lactobacillus had more effect on reducing digestive disease; iii) the transformed Lactobacillus was most effective in improving the digestibilities of crude protein (CP), calcium (Ca), phosphorus (P), compared with the other groups (p<0.05); iv) Lactobacillus could increase lactic acid bacterium number and ammonia concentrations, and decrease pH values and E. coli number in pig feces (p<0.05); v) the phytase activity in the feces of pigs fed with the transformed Lactobacillus was 133.32 U/g, which was higher than in group 4 (9.58 U/g, p<0.05), and was almost the same as group 6 (135.94 U/g); vi) the transformed Lactobacillus could increase serum concentrations of IgA, triglyceride, and glutamic oxaloacetic transaminase activity (p<0.05), and had no significant effect on other serum indexes (p>0.05).
양현수,김영호,양지원 한국화학공학회 1989 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.27 No.2
황과 알칼리금속계(IA) 황화합물 특히 Na₂S₂O₃와 K₂S는 국내의 Pink-C급 고령토(약 1.9% Fe₂O₃함유)를 염화반응할 때 반응속도 및 전환율을 현저히 증가시키는 우수한 촉진효과를 나타내었다. 황과 Na₂S₂O₃를 첨가한 경우 950K에서 20분간 반응할 때 고령토에 포함된 Si, Al 그리고 Fe 성분은 유사한 전환율을 나타내었으며 고령토만의 탄소-염화반응에 비하여 각각 20±1.2%, 60±2.0% 그리고 79±1.5%의 증가를 보였고 K₂S를 첨가할 때에는 각각 27±1.5%, 68±1.8% 그리고 80±0.6%의 비율로 증가하였다. 본 실험에서 사용한 황 및 황화합물은 반응 온도가 높아질수록 Al 성분의 전환율은 Si 성분에 비하여 크게 나타났다. 그러나 일정한 온도에서 반응 시간에 따르는 염화속도를 볼 때 반응 초기단계에서는 Al 성분의 염화속도는 Si 성분에 비하여 매우 크게 나타났으며 반응 시간이 증가함에 따라 Si 성분의 염화속도가 더 크게 나타났다. Elemental sulfur and alkali metal sulfur compounds, especially Na₂S₂O₃ and K₂S, enhanced to a greater extent the rate of carbo-chlorination and conversions of Si, Al and Fe portions in pink-C grade of kaolinic clay(about 1.9 % Fe₂O₃). In carbo-chlorination of kaolinic clay at 950 K for 20 minutes, the addition of elemental sulfur and Na₂S₂O₃ increased to the similar ratio the conversions of Si, Al and Fe portions in clay by 20 ±1.2%, 60 ±2.0% and 79±1.5%, respectively, more than those in carbo-chlorination of clay in the absence of additives. The addition of K₂S increased the chlorination of Si, Al and Fe portions by 27±1.5%, 68±1.8% and 80±0.6%, respectively. Elemental sulfur and sulfur compounds produced a higher conversion of Al portion than that of Si portion as the reaction temperature increases. However, the rate of chlorination of Al portion, in the early stage, increased to be much faster than that of Si portion, whereas the Si portion was chlorinated at a higher rate in the later stage of reaction.