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Search Results: 1 - 10 of 147929 matches for " LI Zhi-rong "
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(E)-5,5′-(Diazene-1,2-diyl)diisophthalic acid N,N-dimethylformamide disolvate
Li Zhang,Zhi-Rong Qu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808032819
Abstract: The title compound, C16H10N2O8·2C3H7NO, was synthesized by the reductive condensation reaction of 5-nitroisophthalic acid in the presence of NaOH. The tetra-acid molecule, which has a crystallographically imposed centre of symmetry, adopts an E configuration with respect to the azo group. In the crystal packing, molecules are linked through intermolecular O—H...O and C—H...O hydrogen-bonding interactions, forming chains propagating in [2overline{1}0].
2-Carboxy-1-phenylethanaminium perchlorate
Xiu-Zhi Li,Hui Li,Zhi-Rong Qu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809016171
Abstract: In the title compound, C9H12NO2+·ClO4 , an intramolecular N—H...O interaction results in the formation of a six-membered ring having a twisted chair conformation. In the crystal structure, intermolecular O—H...O, N—H...O and C—H...O interactions link the molecules into a network. A weak C—H...π interaction is also found.
catena-Poly[cadmium(II)-(μ-3-ammonio-3-phenylpropanoato-κ2O:O′)-di-μ-chlorido]
Zhi-Rong Qu,Xiu-Zhi Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808023179
Abstract: The title compound, [CdCl2(C9H11NO2)]n, is a coordination polymer prepared by the hydrothermal reaction of cadmium(II) chloride and 3-amino-3-phenylpropanoic acid. Geometric parameters are in the usual ranges. The cadmium cation is octahedrally coordinated by four Cl atoms at equatorial sites and two O atoms from two ligands at the axial sites. The material is composed of one-dimensional extended polymeric chains in which two Cl atoms bridge Cd atoms. The crystal structure is stabilized by an intramolecular N—H...O hydrogen bond.
(2Z,2′Z,4E,4′E)-4,4′-(Cyclohexane-1,2-diyldinitrilo)dipent-2-en-2-ol
Xiu-Zhi Li,Zhi-Rong Qu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680800977x
Abstract: A new tetradentate chiral Schiff base ligand, C16H26N2O2, has been synthesized by the reaction of acetylacetone with (1R,2R)-( )-1,2-diaminocyclohexane. Both of the molecules in the asymmetric unit are of the same chirality (R configuration), since the absolute configuration was determined by the starting reagent (1R,2R)-( )-1,2-diaminocyclohexane. The six-membered cyclohexane ring is in a chair conformation, and the substituents are equatorial in the most stable conformation (trans-cyclohexyl). At the ring substituents, large conjugated —C=N—CH=C—OH systems exist, resulting from the original ketone converted into the enol form. With H atoms excluded, the atoms of each substituent lie in the same plane. The two molecules in the asymmetric unit have almost the same structure, with slight differences in the torsion angles between the substituents and the cyclohexane ring; the corresponding N1—(C—C—C)cyclohexane torsion angles are 177.2 (3) and 179.3 (4)° in one molecule and 176.5 (3) and 178.4 (4)° in the other. Two intramolecular O—H...N hydrogen bonds exist in each molecule.
Dichlorido(dimethylformamide-κO)[1,4,7-tris(2-cyanoethyl)-1,4,7-triazacyclononane-κ3N1,N4,N7]nickel(II)
Zhong Zhang,Li-Zhen Wu,Zhi-Rong Geng,Zhi-Lin Wang
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808024422
Abstract: The title complex, [NiCl2(C15H24N6)(C3H7NO)], is isomorphous with the CoII analogue. Three N-atom donors from the facially coordinating triaza macrocyclic ligand, one O-atom donor from dimethylformamide and two Cl anions surround the NiII ion in a distorted octahedral coordination geometry. Intermolecular C—H...Cl and C—H...N hydrogen-bonding interactions link the complex molecules into a three-dimensional supramolecular architecture.
Poly[diaqua-1κ2O-bis[μ3-2-(1H-tetrazol-5-yl)benzoato(2 )]dicadmium(II)]
Xiu-Zhi Li,Bao-Zhen Wu,Zhi-Rong Qu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808020503
Abstract: The title compound, [Cd2(C8H4N4O2)2(H2O)2]n, is a coordination polymer prepared by the hydrothermal reaction of cadmium(II) chloride and 2-(1H-tetrazol-5-yl)benzoic acid. Two types of coordinated cadmium cations exist in the structure. One is located on a twofold axis and is coordinated by four O and two N atoms from four symmetry-related ligands, forming a trigonal-prismatic coordination polyhedron. The other is located on an inversion center and is octahedrally coordinated by two N and two O atoms from two ligands in equatorial sites, and two water molecules in axial sites. The organic ligand bridges three Cd atoms, through a carboxylate group and two N atoms of the tetrazolate unit. This mode of coordination results in a two-dimensional framework. The crystal structure is stabilized by intermolecular O—H...O and O—H...N hydrogen bonds.
APPLICATION OF BAYESIAN CLUSTERING TO THE ANALYSIS OF GENE EXPRESSION PROFILES
贝叶斯聚类在基因表达谱知识挖掘中的应用

BAO Lei,LI Ze,SUN Zhi-rong,
包雷
,李泽,孙之荣

生物物理学报 , 2002,
Abstract: A novel clustering algorithm based on Bayesian model was introduced into the analysis of large-scale gene expression profiles. It was applied to analyze two public gene expression data sets and some new biological knowledge was discovered. Compared with other clustering algorithms used in the gene expression profile analysis, this algorithm worked better both in the algorithmic and the biological sense.
Effects of air temperature,solar radiation and soil water on dry matter accumulation and allocation of greenhouse muskmelon seedlings and related simulation models
温度、光辐射及水分对温室甜瓜幼苗干物质积累与分配的影响及其模拟模型

LI Jian-ming,ZOU Zhi-rong,
李建明
,邹志荣

应用生态学报 , 2007,
Abstract: With different sowing dates and irrigation upper limits, the effects of air temperature, solar radiation and soil water on the dry matter accumulation and allocation of greenhouse muskmelon seedlings were studied, with related simulation models established. The results showed that the dry matter accumulation and allocation of the seedlings had correlations with the changes of effective accumulative temperature, accumulative solar radiation, and irrigation upper limits at different seasons in a year, but the correlation coefficients differed with sowing dates and irrigation upper limits. Comprehensive analysis showed that the dry matter accumulation model was an exponential function, while the dry matter allocation model was a conic function, both of which were driven by effective accumulative temperature. The constant term in the functions was driven by accumulative daily temperature difference and accumulative solar radiation, and the correlation was a linear function. Model test showed that the models were able to objectively simulate and predict the changes of plant dry matter accumulation and allocation, and possessed practical value for the growth analysis and production management of muskmelon seedling.
2-Carboxy-1-(3-nitrophenyl)ethanaminium perchlorate
Wen-Xian Liang,Yan Li,Gang Wang,Zhi-Rong Qu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809051319
Abstract: In the cation of the title compound, C9H11N2O4+·ClO4 , the conformation is stabilized by an intramolecular N—H...O hydrogen bond. In the crystal packing, centrosymmetrically related cations interact through intermolecular O—H...O hydrogen bonds involving the carboxy groups, forming dimers. The dimers and the perchlorate anions are further linked into layers parallel to the ab plane by C—H...O and N—H...O hydrogen-bonding interactions.
Ethyl 4-[(4-chlorophenoxy)methyl]-2-(4-nitrophenyl)-1,3-thiazole-5-carboxylate
Zhi-Rong Deng,Shu-Qing Wang,Wei-Li Dong,Run-Ling Wang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811049774
Abstract: The title compound, C19H15ClN2O5S, contains two molecules (A and B) in the asymmetric unit. In molecule A, the dihedral angles between the thiazole ring and the pendant chlorobenzene and nitrobenzene rings are 72.14 (15) and 3.03 (15)°, respectively. The corresponding angles for molecule B are 45.56 (16) and 1.51 (14)°, respectively. In the crystal, both molecules form inversion dimers linked by pairs of weak C—H...O interactions.
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