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Search Results: 1 - 10 of 146499 matches for " Jian Li "
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A Study of γ-Fe2O3 Nanoparticles Modified Using ZnCl2 during Synthesis  [PDF]
Longlong Chen, Jian Li
Advances in Materials Physics and Chemistry (AMPC) , 2013, DOI: 10.4236/ampc.2013.31A004
Abstract:

Surface modification of γ-Fe2O3 nanoparticles synthesized by a chemically induced transition has been attempted by adding ZnCl2 during synthesis. The structure of the modified particles was studied using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The experimental results showed that ZnFe2O4 grew epitaxially on the γ- Fe2O3 crystallites to form composite nanoparticles with the spinel structure, on which FeCl3 might be adsorbed. The apparent grain size dc estimated by XRD using the Scherrer equation was larger rather than smaller than the average particle size measured by TEM. This paradox can be explained by the effect of absorption in the coating heterolayer.

A Review of Psychological Contract  [PDF]
Jian Li, Liangtie Dai
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.612150
Abstract: This thesis starts from the fuzzy sets and related concepts of Psychological Contract which includes its notion, content, dimension, formation and violation of the Psychological Contract. The writer puts forward some opinions on the basis of previous research achievements by native and foreign scholars. At the same time, the drawbacks, research focal points and trends in the future are pointed out.
Study on TMT Heterogeneity’s Effects on Corporate Performance from the Perspective of Leadership Structure  [PDF]
Jian He, Li Li, Weining Li
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.41017
Abstract: Based on Upper Echelons theory, this article makes use of a sample of 130 companies that experienced CEO succession due to performance decline to investigate whether the TMT heterogeneity impact on corporate performance and how the leadership structure of corporation moderates the relationship between them. It is shown that TMT age heterogeneity has a U-shaped relationship with corporate performance; TMT tenure heterogeneity and TMT educational levels heterogeneity have inverted U-shaped relationship with corporate performance; while the leadership structure of corporation has a moderating effect on the relationship between TMT age heterogeneity, TMT tenure heterogeneity and corporate performance. The findings of this study would be helpful to cultivate and construct the entrepreneurial TMT, and to design corporate leadership structure.
2-Methylpropan-2-aminium 3,4,5,6-tetrabromo-2-(methoxycarbonyl)benzoate methanol monosolvate
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811008518
Abstract: In the crystal structure of the title compound, C4H12N+·C9H3Br4O4 ·CH4O, intermolecular O—H...O, N—H...O and C—H...O hydrogen bonds link the components into columns stacked along the b axis. Between the columns, short Br...O contacts [3.122 (4) ] and C—H...O hydrogen bonds are observed.
2-Methylanilinium 3,4,5,6-tetrabromo-2-(methoxycarbonyl)benzoate methanol monosolvate
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811008543
Abstract: In the anion of the title compound, C7H10N+·C9H3Br4O4 ·CH3O, the dihedral angles formed by the benzene ring and the mean planes of the carboxylate and methoxycarbonyl groups are 74.8 (5) and 75.0 (5)°, respectively. In the crystal, intermolecular N—H...O and O—H...O hydrogen bonds link the components into chains along [100]. Additional stabilization is provided by weak intermolecular C—H...O hydrogen bonds.
2-Hydroxyethanaminium 3,4,5,6-tetrabromo-2-(methoxycarbonyl)benzoate methanol monosolvate
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s160053681100852x
Abstract: In the title compound, C2H8NO+·C9H3Br4O4 ·CH4O, intermolecular N—H...O and O—H...O hydrogen bonds link the components into chains along [001].
Cyclohexanaminium 3,4,5,6-tetrachloro-2-(methoxycarbonyl)benzoate
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811008531
Abstract: In the title compound, C6H14N+·C9H3Cl4O4 , the cyclohexane ring of the cation adopts a chair conformation. In the anion, the mean planes of the methoxycarbonyl and carboxylate groups form dihedral angles of 67.3 (3) and 55.7 (3)°, respectively, with the benzene ring. In the crystal, intermolecular N—H...O hydrogen bonds connect the components into chains along [100].
Benzothiazol-2-amine–3-methoxycarbonyl-7-oxabicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1/1)
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810052542
Abstract: In the title 1:1 adduct, C7H6N2S·C9H10O5, all non-H atoms of the benzothiazol-2-amine molecule are essentially coplanar, with a maximum deviation of 0.0286 (9) for the S atom. In the crystal, intermolecular N—H...O and O—H...N hydrogen bonds connect two molecules of each type into centrosymmetric four-component clusters.
Ethanaminium 3,4,5,6-tetrabromo-2-(methoxycarbonyl)benzoate methanol monosolvate
Jian Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810052591
Abstract: In the crystal structure of the title compound, C2H8N+·C9H3Br4O4 ·CH4O, intermolecular N—H...O and O—H...O hydrogen bonds link the components into chains along [001]. Additional stabilization is supplied by weak C—H...O and C—H...Br interactions.
N-(4-Chlorophenyl)-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide
Jian Li
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810047537
Abstract: In the title racemic compound, C14H10ClNO3, which contains four stereogenic centres, the cyclohexane ring tends towards a boat conformation, while the tetrahydrofuran and dihydrofuran rings adopt envelope conformations. The dihedral angle between the mean planes of the pyrrolidine-2,5-dione unit and the 4-chlorophenyl ring is 49.0 (2)°.
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