全文获取类型
收费全文 | 75篇 |
免费 | 18篇 |
国内免费 | 1篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 7篇 |
2018年 | 7篇 |
2017年 | 3篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 3篇 |
2013年 | 7篇 |
2012年 | 2篇 |
2011年 | 1篇 |
2010年 | 1篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 7篇 |
2006年 | 4篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 2篇 |
排序方式: 共有94条查询结果,搜索用时 203 毫秒
31.
32.
Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction 下载免费PDF全文
Jun Tae Song Hyewon Ryoo Minhyung Cho Jaehoon Kim Jin‐Gyu Kim Sung‐Yoon Chung Jihun Oh 《Liver Transplantation》2017,7(3)
An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96% at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh‐type co‐catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91% Faradaic efficiency at positive potential than the CO2/CO equilibrium potential. 相似文献
33.
Highly fluorescent au nanoclusters: Electrostatically induced phase transfer synthesis for Cu2+ sensing 下载免费PDF全文
Qiansi Chen Yajuan Li Shenghao Xu Weiwei Tie Nan Wang Zhanhang He Pingping Liu Huina Zhou 《Luminescence》2017,32(3):271-276
This paper reports a convenient method for the synthesis of highly fluorescent Au nanoclusters (NCs) via electrostatically induced phase transfer. Furthermore, on the basis of an aggregation‐induced fluorescence quenching mechanism, the potential application for Cu2+ sensing on the fluorescence emission of the Au NCs is discussed. These prepared fluorescent Au NCs offer acceptable sensitivity, high selectivity, and a limit of quantitation of 0.02 μM for the measurement of Cu2+, which is lower than the maximum level (1 ppm, equals to 15.6 μM) of Cu2+ permitted in drinking water in China. This study contributes to the further development of practical applications with fluorescent NCs. 相似文献
34.
Keelung Hong Daniel S. Friend Charles G. Glabe Demetrios Papahadjopoulos 《生物化学与生物物理学报:生物膜》1983,732(1):320-323
A method is described for the preparation of liposomes containing colloidal gold as an electron-dense marker to trace liposome-cell interactions. Since gold sols would precipitate at the high concentrations necessary for loading a large proportion of liposomes, gold sols were formed within preformed liposomes which had encapsulated gold chloride. The optimal conditions for encapsulating the marker were ascertained for liposomes prepared by the method of reverse-phase evaporation. Gold sols formed rapidly at ambient temperature and without organic solvent, and produced homogeneous populations of gold granules inside liposomes. Most vesicles contained the marker, allowing us to determine unambiguously the intracellular fate of liposomes and their contents. The in vitro experiments showed that gold-liposomes were internalized by African green monkey kidney cells in a manner similar to receptor-mediated endocytosis of well-characterized ligands. Preliminary in vivo studies also indicated that liposomes were endocytosed by Kupffer cells via the coated vesicle pathway. 相似文献
35.
Close membrane associations between the endoplasmic reticulum and the plasma membrane (ER-PM) occur in specialized regions of the rat Sertoli cell cytoplasm. They are characterized, in freeze fracture replicas, as mesa-like modifications of E membrane fracture faces or as corresponding discoid depressions on P membrane fracture faces. When these structures lie along transitional regions in the membrane fracture plane, they are seen to be complementary, and the space between them to be greatly reduced. These specialized close membrane associations may represent adhesive sites between the endoplasmic reticulum and the plasma membrane. However, their resemblance to vascular endothelial fenestrae which are known to be sites of increased membrane permeability may suggest other functional roles. 相似文献
36.
Dennis M. McGinley Zoltan Posalaky Martin Porvaznik Lonnie Russell 《Tissue & cell》1979,11(4):741-754
Ultrastructural observations of rat seminiferous tubules show clearly the presence of plasma membrane junctions between Sertoli and germ cells in the basal and adluminal compartments. Results obtained from the freeze fracture and thin section techniques were correlated in order to elucidate the nature of these intercellular junctions. We suggest that these intercellular membrane specializations are gap junctions which occur within regions of plasma membrane that also exhibit adherens-like modifications. 相似文献
37.
38.
Bo Li Yuejin Zhang Juefu Liu Xin Xie Dan Zou Minqiang Li Jinhuai Liu 《Luminescence》2014,29(4):332-337
Au/La2O3 nanomaterials were prepared through calcining Au‐modified La(OH)3 precursors. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X‐ray diffractometry (XRD) were employed to characterize the as‐prepared samples. Benzene, a common volatile organic compound, was selected as a model to investigate the cataluminescence (CTL)‐sensing properties of the Au/La2O3 nanomaterials. Results indicated that the as‐prepared Au/La2O3 exhibited outstanding CTL properties such as stable intensity, high signal‐to‐noise values, and short response and recovery times. Under optimized conditions, the benzene assay exhibited a broad linear range of 1–4000 ppm, with a limit of detection of 0.7 ppm, which was below the standard permitted concentrations. Furthermore, the gas sensor system showed outstanding selectivity for benzene compared with seven other types of common volatile organic compounds (VOCs). The proposed gas sensor showed good characteristics with high selectivity, fast response time and long lifetime, which suggested the promising application of the Au/La2O3 nanomaterials as a novel highly efficient CTL‐sensing material. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
39.
As part of an investigation on the coordination ability of peptides, the dipeptide glycylalanine (H-Gly-Ala-OH), tripeptide glycylalanylalanine (H-Gly-Ala-Ala-OH) and their Au(III)-complexes have been characterized structurally. The quantum chemical calculations and linear-dichroic infrared (IR-LD) spectroscopy predict structures of the compound studied, which are compared with a single crystal X-ray diffraction of H-Gly-Ala-OH. The coordination processes with Au(III) are supported by data for 1H NMR, ESI-MS, HPLC-MS-MS, TGV and DSC methods. The [Au(Gly-Ala)H−1Cl] and [Au(Gly-Ala-Ala)H−2] · 2H2O complexes are formed via -NH2, N−amide/s and groups of the peptides. One Cl− ion is attached to the metal center as terminal ligand in the first complex. In both cases a near to square-planar geometry of the chromophors AuN2OCl and AuN3O is yielded. 相似文献
40.
Yurii Simonov Paulina Bourosh Nicolae Gerbeleu Maria Gdaniec 《Inorganica chimica acta》2006,359(2):721-725
Two complexes of Au(III) with dimethylglyoxime of compositions [AuIII(HDMG)2][AuIIICl4] (1) and [AuIII(HDMG)2][AuICl2] (2) were synthesized and characterized by X-ray structural analysis. It was shown that in [AuIII(HDMG)2]+ cation Au(III) has a square-planar environment, and the oxygen atoms of oxime groups are joined by intramolecular H-bond. The secondary Au?Au and Au?Cl interactions in the crystal are discussed. 相似文献