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Excitation Wavelength Dependence of Photocatalyzed Oxidation of Methanol on TiO2(110)

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Chinese Journal of Chemical Physics 2015年第4期28卷 -页

作者： Zhi-qiang Wang Qun-qing Hao chuan-yao zhou Dong-xu Dai Xue-ming Yang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 China

Post-irradiation temperature-programmed desorption (TPD) has been used to study the photocatalyzed oxidation of methanol on TiO2(110) surface under the irradiation of 360, 380 and 400 nm light. The photocatalytic process initiated by ultraviolet light of different wavelength are similar. Methanol has been photocatalytically converted into formaldehyde, and the released hydrogen atoms transfer to the neighboring twofold coordinated oxygen to form bridging hydroxyls. The reaction rate, however, is strongly wavelength dependent. The reaction rate under 360 nm light irradiation is 4.8 times of that in the case of 400 nm exposure, consistent with a previous femtosecond time-resolved absorption measurement on TiO2 which shows the faster charge carrier recombination in the near-band-gap than the over-band-gap excitation. So far, the underlying factors which govern the excitation wavelength dependence of photocatalytic activity of TiO2 and other photocatalysts remain unclear, and future studies are needed to address this important issue.

关键词： Titanium dioxide Photocatalysis Excitation wavelength dependence Temperature-programmed desorption

17β-Estradiol Regulates Cultured Immature Boar Sertoli Cell Proliferation via the cAMP-ERK1/2 Pathway and the Estrogen Receptor β

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Agricultural Sciences in China 2010年第8期9卷 1201-1210页

作者： WANG Xian-zhong ZHAO Bo-chuan zhou Yu-lan zhou Yin-tao MA Kai-ge ZHANG Jia-hua Chongqing Key Laboratory of Forage ＆ Herbivore College of Animal Science and Technology Southwest University Chongqing 400716P.R. China

Estrogen plays an important role in regulating Sertoli cell number in the testis. The objective of the study was to identify whether 17β-estradiol affected the proliferation of cultured, immature boar Sertoli cells via the estrogen receptor β （ERβ） and the cAMP-extracellular signal-regulated kinase （ERK1/2） pathway. Low levels （10-10-10-8 mol L-1） of 17β-estradiol increased cell number, but high levels （10-7-10-6 mol L-1） decreased it （P〈0.05）. Sertoli cell number began to recover for an additional 24 h in the medium without 17β-estradiol （10-6 mol L-l）（P〉0.05）. The effects of 17β-estradiol （10-9 mol L-1） peaked at the first 24 h （P〈0.05）. 17β-estradiol activated ERK1/2 from 5 min to 24 h, but the activiy of ERK1/2 began to decrease after 4 h. Both PD98059 and U0126, two ERK inhibitors, blocked cell division （P〈0.05）. 17β-estradiol （10-10-10-6 mol L-1） dose-dependently increased cAMP production （P 〈 0.05）, and both 17β-estradiol （10-9 mol L-1） and forskolin, which increases cAMP levels, induced cell proliferation and activated ERK1/2 （P〈 0.05）. Rp-cAMP, an antagonist of cAMP, blocked this 17β-estradiol activity （P〈 0.05）. Two estrogen receptor antagonists, ICI 182780 and ERβ antagonist （ERβAnt）, reduced Sertoli cell number, cAMP production and ERK1/2 activation （P〈 0.05）, but ERaAnt did not （P〉 0.05）. Therefore, 17β- estradiol mainly promotes pig Sertoli cell proliferation via ERβ to induce cAMP production and ERK activation to promote cell proliferation.

关键词： 17β-estradiol Sertoli cell cell proliferation estrogen receptor ERK1/2

Mechanical Properties of Silicone Rubber Using Carbosilane Dendrimers as the Cross-linker

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Chinese Chemical Letters 2005年第10期16卷 1383-1385页

作者： Shi Gui ZHAO chuan Jian zhou Jian Ming ZHANG Sheng Yu FENG School of Material Science and Engineering Shandong University Jinan 250061 School of Chemistry and Chemical Engineering Shandong University Jinan 250100

Peroxide-cured high-temperature vulcanized （HTV） silicone rubber was prepared by using allyl-capped carbosilane dendrimers, in which the core molecule is Si（CHaCH=CH2）4, as the cross-linker. It showed that this ki... 详细信息

关键词： Carbosilane dendrimers cross-linker silicone rubber mechanical properties.

Nd^(3+)-doped Li_3V_2(PO_4)_3 cathode material with high rate capability for Li-ion batteries

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Chinese Chemical Letters 2015年第8期26卷 1004-1007页

作者： Yue-Jiao Li chuan-Xiong zhou Shi Chen Feng Wu Liang Hong Beijing Key Laboratory of Environmental Science and Engineering School of Chemical Engineering and the Environment Beijing Institute of Technology National Development Center for High Technology Green Material

A series of Nd^3＋-doped LiNdxV2-x（PO4）3（x = 0.00, 0.02, 0.05, 0.08 or 0.1） composites are synthesized by the rheological phase reaction method. The XRD results indicate that Nd3＋ions have been successfully merged into a lattice structure. Doped samples show good electrochemical performance in high discharge rate and long cycle. In the potential range of 3.0–4.3 V, Li3Nd0.08V1.92（PO4）3exhibits an initial discharge capacity of 115.8 m Ah/g at 0.2 C and retain 80.86% of capacity retention at 2 C in the 51 st *** addition, Li3Nd0.05V1.95（PO4）3holds at 100.4 m Ah/g after 80 cycles at 0.2 C with a capacity retention of92.4%. Finally, the CV test proves that the potential polarization of Li3Nd0.08V1.92（PO4）3decreased compared with the un-doped one.

关键词： retention cathode rheological retain cycle doping satisfactory holds lithium helpful

Cu-catalyzed cross-couplings under ligandless conditions

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Chinese Chemical Letters 2007年第10期18卷 1199-1202页

作者： chuan zhou Tao Juan Li Xin Cui Yao Fu Qing Xiang Guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

The possibility to carry out Cu-catalyzed cross-couplings under ligandless conditions was studied. It was found that by using K3PO4 as the base, the cross-coupling could proceed successfully between aryl iodides and s... 详细信息

关键词： Cu Catalysis Cross-coupling Ligand free

Serotonin Signaling Modulates Sexual Receptivity of Virgin Female Drosophila

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Neuroscience Bulletin 2022年第11期38卷 1277-1291页

作者： Baoxu Ma Rencong Wang Yaohua Liu Bowen Deng Tao Wang Fengming Wu chuan zhou State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China Department of Plant Protection Shanxi Agricultural UniversityJinzhong 30801China Chinese Institute for Brain Research Zhongguancun Life Sciences ParkBeijing 102206China Institute of Molecular Physiology Shenzhen Bay LaboratoryShenzhen 518132China

The choice of females to accept or reject male courtship is a critical decision for animal ***(5-hydroxytryptamine;5-HT)has been found to regulate sexual behavior in many species,but it is unclear how 5-HT and its receptors function to regulate different aspects of sexual *** we used Drosophila melanogaster as the model animal to investigate how 5-HT and its receptors modulate female sexual *** found that knockout of tryptophan hydroxylase(Trh),which is involved in the biosynthesis of 5-HT,severely reduced virgin female receptivity without affecting post-mating *** identified a subset of sexually dimorphic Trh neurons that co-expressed fruitless(fru),in which the activity was correlated with sexual receptivity in *** also found that 5-HT1A and 5-HT7 receptors regulate virgin female *** findings demonstrate how 5-HT functions in sexually dimorphic neurons to promote virgin female receptivity through two of its receptors.

关键词： Female sexual receptivity Serotonin 5-HT Fruitless Neurochemical 5-HT receptors Drosophila

Two new species of the genus Boysidia from China, with a preliminary discussion of its geography (Pulmonata: Stylommatophora: Pupillidae)

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Zoological Systematics 2014年第4期39卷 570-575页

作者： Wei-Hong Zhang De-Niu Chen Wei-chuan zhou College of Life Sciences and Technology Xinjiang University Institute of Zoology Chinese Academy of Sciences Key Laboratory of Molluscan Quarantine and Identification of AQSIQ Fujian Entry-Exit Inspection & Quarantine Bureau

Two species of the genus Boysidia Ancey, 1881 were reported as new to science, Boysidia（Boysidia） xianfengensis sp. nov. and B.（B.） xiaoguanensis sp. nov., while the distribution of the 23 species of Boysidia from China was discussed. The materials of the new species were collected from Hubei Province, China by authors. The shell of B.（B.） xianfengensis sp. nov. looks small（height 4.90 mm, diameter 3.10 mm）, and has five apertural teeth： one large parietal tooth, one long columellar tooth, one small nipple-shaped upper palatal tooth, one large flake-shaped lower palatal tooth, one small infrapalatal tooth. The shell of B.（B.） xiaoguanensis sp. nov. looks small（height 3.55 mm, diameter 2.20 mm）, and has four apertural teeth： one large parietal tooth, one long columellar tooth, one large flake-shaped upper palatal tooth, one slightly small flake-shaped lower palatal tooth. The type specimens of the new species are deposited in the Institute of Zoology, Chinese Academy of Sciences, China.

关键词： Land snail Boysidia taxonomy new species

Optimization on cut-hole of mining tunnel excavation

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Mining Science and Technology 2009年第1期19卷 70-73页

作者： zhou chuan-bo WANG peng LEI Yong-jian YIN Xiao-peng Engineering College China University of Geosciences Wuhan Hubei 430074 China Wisdri Engineering ＆ Research Incorporation Limited Wuhan Hubei 430223 China Ming Company of Wuhan Steel and Iron Unite Company WuhanHubei 430080 China

The efficiency of excavation a mining tunnel is definitely linked with modes of cut-holes. According to experience and methods of engineering analogy, the double-wedge cut, the 9-hole cut and the single spiral cut were determined originally by considering the production conditions and blasting environment of the mining tunnels of the-74 m horizontal in the Da-ye iron mine. Based on acquired modes of cut-holes, the effect of the cut was studied, on the one hand, by a numerical simulation method with the aid of LS-DYNA3D, a nonlinear dynamic finite element program; on the other hand, a spot experiment was carried out in the mining tunnels. Both the numerical simulation and the spot experiment demonstrated and agreed that a single spiral cut provides the optimum excavation effect.

关键词： mining tunnel excavation cut-hole optimization numerical simulation spot experiment

Cu-catalyzed arylation of phosphinic amide facilitated by (±)-trans-cyclohexane-1,2-diamine

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Chinese Chemical Letters 2007年第9期18卷 1033-1036页

作者： Juan Li Song Lin Zhang chuan zhou Tao Yao Fu Qing Xiang Guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

Cu-catalyzed cross coupling between phosphinic amides and aryl halides was accomplished for the first time by using (±)-trans-cyclohexane-1,2-diamine as the ligand. This reaction provided a novel approach for synthesizing arylated phosphinic amides. Both kinetic measurement and theoretical calculation indicated that phosphinic amides were much less reactive than amides by about 10 times in Cu-catalyzed cross coupling.

关键词： Phosphinic amide Copper Catalyst Cross coupling