On the correlation between dye coverage and photoelectrochemical performance in dye-sensitized solar cells

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)Concentration depth profiles of the ruthenium based dyes Z907 and N719 adsorbed onto titania are measured directly and used for determining the adsorption isotherm of the dyes. Dye layers formed by both grow in islands on the titania which do not cover the entire titania surface even at the maximum coverage. Impedance spectroscopy in conjunction with the adsorption isotherms shows that recombination losses mainly appear between the dye and the electrolyte solution. The short circuit current and the efficiency increase linearly with the dye coverage. The open circuit voltage slightly increases with increasing dye coverage which is interpreted as most likely to be a consequence of the higher charge in the particles upon higher dye loading on the TiO2 surface

On the solubility of wood in non-derivatising ionic liquids

Peer reviewe

Molecular alliance of Lymantria dispar multiple nucleopolyhedrovirus and a short unmodified antisense oligonucleotide of its anti-apoptotic IAP-3 gene: A novel approach for gypsy moth control

Baculovirus IAP (inhibitor-of-apoptosis) genes originated by capture of host genes. Unmodified short antisense DNA oligonucleotides (oligoDNAs) from baculovirus IAP genes can down-regulate specific gene expression profiles in both baculovirus-free and baculovirus-infected insects. In this study, gypsy moth (Lymantria dispar) larvae infected with multiple nucleopolyhedrovirus (LdMNPV), and LdMNPV-free larvae, were treated with oligoDNA antisense to the RING (really interesting new gene) domain of the LdMNPV IAP-3 gene. The results with respect to insect mortality, biomass accumulation, histological studies, RT-PCR, and analysis of DNA apoptotic fragmentation suggest that oligoRING induced increased apoptotic processes in both LdMNPV-free and LdMNPV-infected insect cells, but were more pronounced in the latter. These data open up possibilities for promising new routes of insect pest control using antisense phosphodiester DNA oligonucleotides

Molecular Alliance of Lymantria dispar Multiple Nucleopolyhedrovirus and a Short Unmodified Antisense Oligonucleotide of Its Anti-Apoptotic IAP-3 Gene: A Novel Approach for Gypsy Moth Control

Baculovirus IAP (inhibitor-of-apoptosis) genes originated by capture of host genes. Unmodified short antisense DNA oligonucleotides (oligoDNAs) from baculovirus IAP genes can down-regulate specific gene expression profiles in both baculovirus-free and baculovirus-infected insects. In this study, gypsy moth (Lymantria dispar) larvae infected with multiple nucleopolyhedrovirus (LdMNPV), and LdMNPV-free larvae, were treated with oligoDNA antisense to the RING (really interesting new gene) domain of the LdMNPV IAP-3 gene. The results with respect to insect mortality, biomass accumulation, histological studies, RT-PCR, and analysis of DNA apoptotic fragmentation suggest that oligoRING induced increased apoptotic processes in both LdMNPV-free and LdMNPV-infected insect cells, but were more pronounced in the latter. These data open up possibilities for promising new routes of insect pest control using antisense phosphodiester DNA oligonucleotides

Assessment of the pedagogical and psychological criteria for aesthetic education of middle and high school students

The purpose of the present study is to test and determine the effectiveness of the unique method for quantifying the aesthetic and psychological criteria of aesthetic education of middle and senior school-age students. This method allows conducting a group study on the criteria of aesthetic education of students for a limited time (one academic hour). The results allow performing a comparative analysis of the level of aesthetic education of individual students on certain criteria of aesthetic education in general (as well as on the components of these criteria), and conducting a comparative analysis of the aesthetic education between individual groups. The method is based on the use of some already known technics of psychological diagnosis of teenagers and young persons, developed by R.S. Nemov, as well as methods for researching the activity of thinking by I.M. Lushikhina. The new interpretive schemes of well-known methods proposed by the authors allow quantifying not only the cognitive abilities of students, but also assessing the level of development of their visual skills. The latter is particularly important because, when combined with a quantitative assessment of the social criterion of aesthetic upbringing, it provides the most complete picture of the level of aesthetic development of students at a certain period

On the Influence of Anions in Binary Ionic Liquid Electrolytes for Monolithic Dye-Sensitized Solar Cells

Five ionic liqs. (ILs) Im+A-, where Im+ = 1-methyl-3-n-butyl-imidazolium, A- = I- (1), BF4- (2), SCN- (3), CF3CO2- (4), and CF3SO3- (5), were used in electrolytes for dye-sensitized monolithic solar cells. The properties of the electrolytes and various characteristics of the solar cell performance, such as electron transport and electron lifetime, were studied. The compn. of the binary electrolytes, i.e., the different anions, have a significant effect on the viscosity, but only a modest effect of the measured diffusion coeff. for triiodide. No significant effect of the electrolyte compn. on the electron transport time in the mesoporous TiO2 film was found, while there was a pronounced effect on the electron lifetime. Monolithic solar cells with thiocyanate, IL 3, showed overall light-to-electricity conversion efficiency up to 5.6% in 250 W m-2 simulated sunlight and have promising stability

A photoelectrochemical device for visible light driven water splitting by a molecular ruthenium catalyst assembled on dye-sensitized nanostructured TiO2

A photoelectrochem. device with a mol. Ru catalyst assembled via pH-modified Nafion on a dye-sensitized nanostructured TiO2 film as anode and a Pt foil as cathode has been successfully demonstrated to split water into O2 and H2 driven by visible light

Double-layered NiO photocathodes for p-type DSSCs with record IPCE

The P1- or C343-sensitized NiO photocathodes for p-DSSCs were optimized to obtain substantial current from thin films prepd. in two steps rather than one. These films are capable of adsorbing more dye, in comparison to one step films with the same thickness, due to their greater d., and appear to show better charge collection efficiency. Consequently, a significant photocurrent is obtained from the p-DSSC, giving 64% IPCE. The electrode should have sufficient current to match an n-type photoanode in a tandem cell, allowing an improvement the Voc above that of TiO2-based n-DSSCs

Hysteretic damper based on the Ishlinsky-Prandtl model

In this paper we consider the mathematical model of hysteretic damper based on the Ishlinsky-Prandtl model. The numerical results for the observable characteristics such as force transmission function and “force-displacement” transmission function are obtained and analyzed. The comparison of the efficiency of non-linear viscous damper and hysteretic damper is also presented and discussed

Hysteretic damper based on the Ishlinsky-Prandtl model

In this paper we consider the mathematical model of hysteretic damper based on the Ishlinsky-Prandtl model. The numerical results for the observable characteristics such as force transmission function and “force-displacement” transmission function are obtained and analyzed. The comparison of the efficiency of non-linear viscous damper and hysteretic damper is also presented and discussed