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Search Results: 1 - 10 of 114271 matches for " LIU Yan-lan "
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Crystallization Properties of Schoenite in Ethanol-Water and Methanol-Water Mixed Solvents
软钾镁矾在乙醇-水和甲醇-水混合溶剂中的结晶特性

YUAN Jun-sheng,HAN Rong-min,LIU Yan-lan,GUO Xiao-fu,
袁俊生
,韩荣敏,刘燕兰,郭小甫

过程工程学报 , 2012,
Abstract: Using wet slag method,the solubilities of schoenite in ethanol-water and methanol-water systems were determined.With conductivity method,the metastable zone widths of schoenite were measured,and the influences of temperature,cooling rate and agitating rate on it also investigated.The results show that the higher proportion the ethanol or methanol in the mixed solvents,the smaller solubility the schoenite has.When the volume ratio of methanol or ethanol to water is 1:1,the solubility of schoenite nearly reach zero.Moreover,the crystalline area of K2SO4 in methanol-water solvent is bigger than that in ethanol-water solvent under the same solvent ratio.Under the present experimental conditions,the metastable zone width of schoenite is expanded from 0.40% to 1.48% with the cooling rate increasing from 15 to 35℃/h,decreasing from 1.54% to 1.04% along with the stirring rate increasing from 250 to 460 r/min,and changing from 1.61% to 1.24% when the temperature rises from 25℃ to 35℃.
3-Chloro-N-(4-hydroxy-3-methoxybenzyl)-2,2-dimethylpropanamide
Yan-Lan Huang,Wen-Long Wang,Shang Shan
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810009529
Abstract: In the molecular structure of the title compound, C13H18ClNO3, the amide group is nearly perpendicular to the benzene ring, making a dihedral angle of 85.66 (9)°. The C=O bond distance of 1.242 (3) and the C—N bond distance of 1.333 (3) suggest electron delocalization in the amide fragment. Intermolecular O—H...O and N—H...O hydrogen bonding helps to stabilize the crystal structure.
ATP synthase ecto-α-subunit: a novel therapeutic target for breast cancer
Jian Pan, Li-Chao Sun, Yan-Fang Tao, Zhuan Zhou, Xiao-Li Du, Liang Peng, Xing Feng, Jian Wang, Yi-Ping Li, Ling Liu, Shui-Yan Wu, Yan-Lan Zhang, Shao-Yan Hu, Wen-Li Zhao, Xue-Ming Zhu, Guo-Liang Lou, Jian Ni
Journal of Translational Medicine , 2011, DOI: 10.1186/1479-5876-9-211
Abstract: Differential protein expression in two breast cancer cell lines, one with high and the other with low metastatic potential, was analyzed using two-dimensional liquid phase chromatographic fractionation (Proteome Lab PF 2D system) followed by matrix-assisted laser desorption/time-of-flight mass spectrometry (MALDI-TOF/MS).Up regulation of α-subunit of ATP synthase was identified in high metastatic cells compared with low metastatic cells. Immunohistochemical analysis of 168 human breast cancer specimens on tissue microarrays revealed a high frequency of ATP synthase α-subunit expression in breast cancer (94.6%) compared to normal (21.2%) and atypical hyperplasia (23%) breast tissues. Levels of ATP synthase expression levels strongly correlated with large tumor size, poor tumor differentiation and advanced tumor stages (P < 0.05). ATP synthase α-subunit over-expression was detected on the surface of a highly invasive breast cancer cell line. An antibody against the ATP synthase α-subunit inhibited proliferation, migration and invasion in these breast cancer cells but not that of a non-tumor derived breast cell line.Over-expression of ATP synthase α-subunit may be involved in the progression and metastasis of breast cancer, perhaps representing a potential biomarker for diagnosis, prognosis and a therapeutic target for breast cancer. This finding of this study will help us to better understand the molecular mechanism of tumor metastasis and to improve the screening, diagnosis, as well as prognosis and/or prediction of responses to therapy for breast cancer.Breast cancer is one of the most frequently diagnosed and deadly cancers, with an estimated incidence of 7.6-9.1/10 000 inhabitants worldwide per year [1]. For some decades, studies of molecular alterations in tumors have successfully elucidated some mechanisms of mammary carcinogenesis, progression and metastasis, and identified key genes such as ERBB2, TP53, CCND1, BRCA1 and BRCA2 [2,3]. Although the survival of pa
An Innovative Gas Sensor with On-Chip Reference Using Monolithic Twin Laser
ZHANG Yong-Gang,TIAN Zhao-Bing,ZHANG Xiao-Jun,GU Yi,LI Ai-Zhen,ZHU Xiang-Rong,ZHENG Yan-Lan,LIU Sheng,
张永刚
,田招兵,张晓钧,顾溢,李爱珍,祝向荣,郑燕兰,刘盛

中国物理快报 , 2007,
Abstract: An innovative gas sensor with on-chip reference using a monolithic twin laser is proposed. In this sensor a monolithic twin laser generates two closer laser beams with slight different wavelengths alternatively, one photodiode is used to catch both absorption and reference signals by time division multiplexing. The detection of nitrous oxide adopting this scheme using a 2.1 I~m antimonide laser and an InGaAs photodiode has been demonstrated experimentally with detection limit below i ppm. Using this on chip reference scheme the fluctuations from the optical path and devices can be compensated effectively; the sensor system is simplified distinctly.
(E)-3-(3-Chlorophenyl)-N-(4-hydroxy-3-methoxybenzyl)acrylamide
Liang-You Xia,Wen-Long Wang,Yan-Lan Huang,Shang Shan
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810022713
Abstract: In the title compound, C17H16ClNO3, the 4-hydroxy-3-methoxybenzyl group is planar [maximum atomic deviation = 0.0138 (16) ] and is nearly perpendicular to the chlorobenzene ring, making a dihedral angle of 84.67 (4)°. The chlorobenzene and amide groups are located on the opposite sides of the C=C bond, showing an E configuration. The relatively long C=O bond distance of 1.2364 (19) and the short C—N bond distance of 1.341 (2) suggest electron delocalization in the amide fragment. Intermolecular O—H...O, N—H...O and weak C—H...O hydrogen bonding is present in the crystal structure.
N′-[(E)-3-Indol-3-ylmethylene]isonicotinohydrazide monohydrate
Liang-You Xia,Wen-Long Wang,Shan-Heng Wang,Yan-Lan Huang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809027329
Abstract: Crystals of the title compound, C15H12N4O·H2O, were obtained from a condensation reaction of isonicotinylhydrazine and 3-indolylformaldehyde. The molecule assumes an E configuration, with the isonicotinoylhydrazine and indole units located on the opposite sites of the C=N double bond. In the molecular structure the pyridine ring is twisted with respect to the indole ring system, forming a dihedral angle of 44.72 (7)°. Extensive classical N—H...N, N—H...O, O—H...O and O—H...N hydrogen bonding and weak C—H...O interactions are present in the crystal structure.
(E)-Benzaldehyde (2,4,6-trichlorophenyl)hydrazone
Yan-Lan Huang,Deng-Feng Li,Jian Sun,Jin-Hua Gao
Acta Crystallographica Section E , 2011, DOI: 10.1107/s160053681100328x
Abstract: The title compound, C13H9Cl3N2, was obtained from a condensation reaction of benzaldehyde and 2,4,6-trichlorophenylhydrazine. The molecule assumes an E configuration with the phenyl ring and trichlorophenyl ring located on opposite sides of the C=N bond. The phenyl ring is oriented at a dihedral angle of 42.58 (12)° with respect to the tricholorophenyl ring. In the crystal, the molecules are linked via N—H...N hydrogen bonds, forming supramolecular chains running along the c axis. π–π stacking is present between parallel trichlorophenyl rings of adjacent molecules, the face-to-face and centroid–centroid distances being 3.369 (14) and 3.724 (2) , respectively.
(E)-N′-[1-(Thiophen-2-yl)ethylidene]benzohydrazide
Shang Shan,Yan-Lan Huang,Han-Qi Guo,Deng-Feng Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811033101
Abstract: The title compound, C13H12N2OS, was obtained from the condensation reaction of 2-acetylthiophene and benzohydrazide. In the molecule, the formohydrazide fragment is approximately planar (r.m.s deviation = 0.0146 ) and the mean plane is oriented at dihedral angles of 24.47 (11) and 28.86 (13)°, respectively, to the phenyl and thiophene rings. The thiophene and phenyl rings make a dihedral angle of 53.21 (8)°. The benzamide fragment and thiophene ring are located on the opposite sides of the C=N bond, showing an E conformation. Classical intermolecular N—H...O hydrogen bonds and weak C—H...O interactions are present in the crystal structure: three such bonds occur to the same O-atom acceptor.
Benzyl 3-[(E)-2-nitrobenzylidene]dithiocarbazate
Shang Shan,Yan-Lan Huang,Han-Qi Guo,Deng-Feng Li
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811028686
Abstract: The title compound, C15H13N3O2S2, was obtained from a condensation reaction of benzyl dithiocarbazate and 2-nitrobenzaldehyde. In the molecule, the nearly planar dithiocarbazate fragment [r.m.s deviation = 0.0264 ] is oriented at dihedral angles of 7.25 (17) and 74.09 (9)°with respect to the two benzene rings. The nitro group is twisted by a dihedral angle of 22.4 (7)° to the attached benzene ring. The nitrobenzene ring and dithiocarbazate fragment are located on the opposite sides of the C=N bond, showing an E configuration. In the crystal, molecules are linked via intermolecular N—H...S hydrogen bonds, forming centrosymmetric supramolecular dimers. Weak C—H...π interaction is also observed in the crystal structure.
Benzyl (E)-3-(2-methylbenzylidene)dithiocarbazate
Shang Shan,Zhao Wang,Yan-Lan Huang,Han-Qi Guo
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811033113
Abstract: The title compound, C16H16N2S2, was obtained from the condensation reaction of benzyl dithiocarbazate and 2-methylbenzaldehyde. The asymmetric unit contains two independent molecules. In both molecules, the methylphenyl ring and the dithiocarbazate fragment are located on opposite sides of the C=N bond, showing an E conformation. In each molecule, the dithiocarbazate fragment is approximately planar, the r.m.s deviations being 0.018 and 0.025 . The mean plane of dithiocarbazate group is oriented at dihedral angles of 7.9 (3) and 68.24 (12)°, respectively, to the methylphenyl and phenyl rings in one molecule, while the corresponding angles in the other molecule are 10.9 (3) and 69.76 (16)°. Intermolecular N—H...S hydrogen bonding occurs in the crystal structure to generate inversion dimers for both molecules.
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