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61.
  • Gao, Aiping, et al. (författare)
  • Asymmetric oxidation of sulfides catalyzed by vanadium(IV) complexes of dibromo- and diiodo-functionalized chiral Schiff bases
  • 2006
  • Ingår i: Cuihuà xuébào. - 0253-9837 .- 1872-2067. ; 27:8, s. 743-748
  • Tidskriftsartikel (refereegranskat)abstract
    • The catalyst system of VO(acac)(2) and Schiff base ligands derived from 3,5-dibromo- or 3,5-diiodosalicylaldehyde and inexpensive chiral amino alcohols was prepared. This catalyst displayed good yields and moderate to high enantioselectivity for the asymmetric oxidation of aryl methyl sulfides at room temperature when 1% catalyst (VO(acac)(2)/ligand molar ratio of 1: 2) and H2O2 Oxidant were used. The ligands derived from ( S)valinol exhibited considerably higher enantioselectivity than those ligands derived from ( S)-phenylalaninol and (R)-leucinol. The enantiomeric excess values were improved up to 88% for methyl phenyl sulfoxide and 92% for methyl p-bromophenyl sulfoxide by slow dropwise addition of H2O2 with the ligand prepared from 3 15-diiodosalicylaldehyde and (s)-valinol. The present study showed that the catalytic efficiency of VO(acac)(2) /Schiff base systems could not be improved by the addition of carboxylic acids or carboxylate salts.
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62.
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64.
  • Gao, Qin, et al. (författare)
  • 甲基对硫磷水解酶分离条件的量热学优化
  • 2012
  • Ingår i: Guangzhou Chemical Industry and Technology. ; 40:8, s. 7-9
  • Tidskriftsartikel (refereegranskat)abstract
    • Methyl parathion hydrolase ( MPH ) as and bovine serum albumin (BSA) as hybrid proteins, the target protein, bovine hemoglobin (BHb), myoglobin (Mb) enzyme thermal analysis was used to determine the best separation condition of methyl parathion hydrolase through the study of pH and the NaC1 concentration in mobile phase. The results showed that at pH 8.0, NaC1 concentration of 0.8 mol/L, the separation condition of methyl parathion hydrolase was the best which consistent with the condition reported in the literature.
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65.
  • Ge, Li, et al. (författare)
  • Higher Nursing Education in Sweden
  • 2007
  • Ingår i: CHINESE JOURNAL OF NURSING EDUCATION. - Beijing : 《中华护理教育》杂志编辑委员会. - 1672-9234. ; 4:5, s. 235-236
  • Tidskriftsartikel (refereegranskat)abstract
    •  2005年9月和2006年10月,笔者应瑞典韦克舍大学 Växjö University)的邀请,先后两次赴瑞典韦克舍讲学.在讲学期间,对瑞典韦克舍大学健康科学和社会工作学院、韦克舍中心医院、社区医院及老人院进行参观、学习与研讨,其护理教育给我们留下深刻的印象
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66.
  • Ge, Li, 1974-, et al. (författare)
  • The Investigation and Analysis on Chinese Medicine Constitution Types of Pregnant Metaphase Women in Fuzhou
  • 2013
  • Ingår i: Chinese General Practice. - Beijing. - 1007-9572. ; 16:6A, s. 1920-1922
  • Tidskriftsartikel (refereegranskat)abstract
    • 【Abstract】Objective To investigate and analyze the Chinese medicine constitution types of pregnant metaphase women in Fuzhou of China. Methods Cross-sectional study and stratified sampling were used. A scale, , was as a tool for investigation. 1000 scale copies were handed out. 989 scale copies were got after excluding the scale copies with logic error. Constitution types were described by constituent ratio. Results In Fuzhou, the Chinese medicine constitution types of pregnant metaphase women were as following: Yang-deficiency type was 28.5%, damp-heat type was 25.5%, Yin-deficiency type was 25.2%, Qi-depression type and Qi-deficiency type were 23.1% respectively, gentleness type was 20.2%, stasis type was 19.1%, phlegm type was 10.9%, and special intrinsic type was 7.0%. The front three constitution types in different age groups: 20 years old~group: Qi-deficiency type was 29.4%, gentleness type was 24.8%, Yin-deficiency type and yang-deficiency type were 24.2% respectively; 25 years old~group:Yang-deficiency type was 27.6%, Yin-deficiency type and damp-heat type were 23.3% respectively; 30 years old~group: damp-heat type was 34.4%, Yang-deficiency type was 33.9%, Yin-deficiency type was 30.8%. The distribution of constitution types in different education background groups was similar as that of total constitution types of pregnant metaphase women. Conclusions The constitution type’s characteristics of pregnant metaphase women in Fuzhou were inclined to deficiency, heat and damp, and Qi-depression. Guided by the theory of “Preventive Treatment of Disease”, the staff working on antepartum care may provide targeted care according to different body constitution types of pregnant women.
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70.
  • Guo, X. W., et al. (författare)
  • Methylation of 4-methylbiphenyl with methanol over metal oxide-modified HZSM-5 zeolite catalysts
  • 2003
  • Ingår i: Cuihuà xuébào. - 0253-9837 .- 1872-2067. ; 24:5, s. 333-337
  • Tidskriftsartikel (refereegranskat)abstract
    • A series of HZSM-5 zeolite catalysts modifed with metal oxides (MgO, CaO, SrO, BaO, ZnO, La2O3 and CeO2) were prepared by impregnation method and characterized by XRD, TPD and N-2-adsorption. Methylation of 4-methylbiphenyl (4-MBP) with methanol to 4,4'-dimethylbiphenyl (4,4'-DMBP) was carried out over the prepared catalysts under fixed-bed down-flow conditions. The results showed that the MgO-modified HZSM-5 can significantly improve the selectivity for target product 4,4'-DMBP (up to 80 % vs only 13 % over the parent HZSM-5). The effects of metal oxides on 4,4'-DMBP selectivity are arranged in the following order: MgO>SrOapproximate toZnOapproximate toCaOapproximate toLa(2)O(3)>BaO>CeO2. The effects of MgO contents, precursor-salt types, and loading methods were further investigated, and the results revealed that during 4-MBP conversion, proper MgO loading (5.6 %) can be more effective, and the ion-exchange methed is much better than the impregnation method. However, it is difficult to get higher metal oxide loading by using the ion-exchange method. The high selectivity over HZSM-5 modified with MgO largely results from the depression of 4,4-DMBP second reactions such as isomerization, dealkylation and alkylation, as demonstrated by the reaction of 4,4'-DMBP as reactant over MgO/ZSM-5 catalyst and HZSM-5 zeolite.
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