2,859 research outputs found
Механохимический синтез и физико-химические исследования новых материалов для сенсорного контроля газовых сред
Una introducción a la traducción científica
Sección: Reseñas bibliográficas. Http://www.medtrad.orgEsta obra del traductor y profesor francés
Jean Maillot (1905-1993) no es un tratado teórico
de traducción ni un manual de metodología de
la traducción, sino una exposición sencilla y clara
de algunos de los problemas de la traducción
científica y técnica a través de una abundante
acumulación de casos concretos extraídos del
francés, alemán, inglés y ruso.Peer reviewe
Evidence of secondary relaxations in the dielectric spectra of ionic liquids
We investigated the dynamics of a series of room temperature ionic liquids
based on the same 1-butyl-3-methyl imidazolium cation and different anions by
means of broadband dielectric spectroscopy covering 15 decades in frequency
(10^(-6)-10^9 Hz), and in the temperature range from 400 K down to 35 K. An
ionic conductivity is observed above the glass transition temperature T_{g}
with a relaxation in the electric modulus representation. Below T_{g}, two
relaxation processes appear, with the same features as the secondary
relaxations typically observed in molecular glasses. The activation energy of
the secondary processes and their dependence on the anion are different. The
slower process shows the characteristics of an intrinsic Johari-Goldstein
relaxation, in particular an activation energy E_{beta}=24k_{B}T_{g} is found,
as observed in molecular glasses.Comment: Major revision, submitted to Phys. Rev. Let
Convenient and Sustainable Hydrogen Storage using Liquid Organic Hydrogen Carrier (LOHC) Technologies
Exploration of diffusional phenomena during LOHC dehydrogenation with Pt/Al2O3-catalysts of varying pore sizes
Extraordinarily Efficient Conduction in a Redox-Active Ionic Liquid
Iodine added to iodide-based ionic liquids leads to extraordinarily efficient
charge transport, vastly exceeding that expected for such viscous systems.
Using terahertz time-domain spectroscopy, in conjunction with dc conductivity,
diffusivity and viscosity measurements we unravel the conductivity pathways in
1-methyl-3-propylimidazolium iodide melts. This study presents evidence of the
Grotthuss mechanism as a significant contributor to the conductivity, and
provides new insights into ion pairing processes as well as the formation of
polyiodides. The terahertz and transport results are reunited in a model
providing a quantitative description of the conduction by physical diffusion
and the Grotthuss bond-exchange process. These novel results are important for
the fundamental understanding of conduction in molten salts and for
applications where ionic liquids are used as charge-transporting media such as
in batteries and dye-sensitized solar cells.Comment: Article: 17 pages, 3 figures. Supplementary information: 14 pages, 6
figures. Table of contents figure: 1 page. Accepted for publication in
ChemPhysChe
Eine Kosten-Effektivitäts-Analyse der Impfung von Blutspendern zur Reduktion der Transmission des Hepatitis-B-Virus im Rahmen von Bluttransfusionen
Coke Formation during Propane Dehydrogenation over Ga−Rh Supported Catalytically Active Liquid Metal Solutions
Capturing spatially resolved kinetic data and coking of Ga–Pt supported catalytically active liquid metal solutions during propane dehydrogenation in situ
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