排序方式: 共有78条查询结果,搜索用时 31 毫秒
11.
L. H. Slooff E. E. Bende A. R. Burgers T. Budel M. Pravettoni R. P. Kenny E. D. Dunlop A. Büchtemann 《固体物理学:研究快报》2008,2(6):257-259
The Luminescent Solar Concentrator (LSC) consists of a transparent polymer plate, containing luminescent particles. Solar cells are connected to one or more edges of the polymer plate. Incident light is absorbed by the luminescent particles and re‐emitted. Part of the light emitted by the luminescent particles is guided towards the solar cells by total internal reflection. Since the edge area is smaller than the receiving one, this allows for concentration of sunlight without the need for solar tracking. External Quantum Efficiency (EQE) and current–voltage (I –V) measurements were performed on LSC devices with multicrystalline silicon (mc‐Si) or GaAs cells attached to the sides. The best result was obtained for an LSC with four GaAs cells. The power conversion efficiency of this device, as measured at European Solar Test Installation laboratories, was 7.1% (geometrical concentration of a factor 2.5). With one GaAs cell attached to one edge only, the power efficiency was still as high as 4.6% (geometrical concentration of a factor 10). To our knowledge these efficiencies are among the highest reported for the LSC. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
12.
H. Bende 《Fresenius' Journal of Analytical Chemistry》1968,237(6):444
Ohne Zusammenfassung 相似文献
13.
H. Bende 《Fresenius' Journal of Analytical Chemistry》1967,232(2):158
Ohne Zusammenfassung 相似文献
14.
H. Bende 《Fresenius' Journal of Analytical Chemistry》1967,231(5):372
Ohne Zusammenfassung 相似文献
15.
16.
H. Bende 《Fresenius' Journal of Analytical Chemistry》1967,228(4):299
Ohne Zusammenfassung 相似文献
17.
W. Bögershausen K. Behrends H. A. Rohleder E. Häberli W. Schmidt J. van Calker K. Bormann H. Monten H. Wagner M. Meyer zur Heyde B. Tvaroha A. Schmidt M. Müller H. Bende C. Hesse B. R. Glutz M. Mengel M. Hivná K. Henning A. E. Bühler L. Johannsen und A. Sylvester 《Fresenius' Journal of Analytical Chemistry》1968,240(3):186-212
Ohne Zusammenfassung 相似文献
18.
Sivacharan Kollipara Girish Bende Nitin Agarwal Brijesh Varshney Jyoti Paliwal 《Chromatographia》2011,73(3-4):201-217
US FDA released guidelines for bioanalytical method validation in 2001 and it became the basis for guidelines such as ANVISA and EMA. Even though there is a general agreement between these guidelines in terms of evaluation of validation parameters, significant diversity exists with respect to methodology employed. Present review compares and summarizes the regulatory guidelines issued by US FDA, ANVISA and EMA for bioanalytical method validation. This review also discusses evaluation of certain validation parameters such as matrix effect, incurred sample reanalysis, various stability aspects, effect of anticoagulant counter ions, specificity in the presence of concomitant medications, and identification of pharmacokinetic repeats wherein specific guidance and general consensus amongst scientific community does not exist. 相似文献
19.
Intermolecular interactions between a single water and two N,N′-dimethylethyleneurea (DMEU) molecules have been investigated using ab initio quantum chemistry method. The local and density-fitting approximations of the standard Møller-Plesset perturbation theory (DF-LMP2) have been employed together with the aug-cc-pVTZ basis set. Several trimeric systems were built where the water molecule, through the O-H?N hydrogen bond interactions, played the role of the bridge between the two DMEU molecules. The results show that the presence of the water molecule does not increase the stability of the trimeric systems. In the first three configurations the water molecule intercalates between two DMEU molecules, forming stable clusters. In the next three configurations, the water molecule is attached to a plane-parallel stacked DMEU dimer through the C=O?H-O hydrogen bond, and these structures are more stable than the first three. Small-angle neutron scattering data show clustering of DMEU molecules in their dilute aqueous solutions, and the ab initio results suggest that DMEU molecules could form contact pairs in dilute aqueous solutions. 相似文献
20.
We have calculated the charge transfer (CT) between the group of DNA and the lysine (Lys) and arginine (Arg) positive side chains of histones in presence of water and K+ ions. The calculations were performed at the HF + MP2 level, using the TZVP basis set. The calculations were corrected for basis set superposition error and besides Mulliken’s population analysis we have introduced the – for charged systems more reliable – natural population analysis. The results show that the bare -Lys and the -Arg interactions become weaker, mainly, due to the presence of the K+ ion. We have found 0.067e CT for Lys and 0.050e for Arg. 相似文献