A5050810663- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Silicon Nanostructures and Photoluminescence
- Crystallization and Solubility Studies
- Religion, Theology, and Education
- X-ray Diffraction in Crystallography
- Chemical Thermodynamics and Molecular Structure
- Religious Education and Schools
- German legal, social, and political studies
- Ionic liquids properties and applications
- Chemical and Physical Properties in Aqueous Solutions
- Crystallography and molecular interactions
- Semiconductor materials and devices
- Thermal and Kinetic Analysis
- Phase Equilibria and Thermodynamics
- Semiconductor materials and interfaces
- Civil and Structural Engineering Research
- Free Radicals and Antioxidants
- Crystal structures of chemical compounds
- Religion, Theology, History, Judaism, Christianity
- Advanced Fiber Laser Technologies
- Glass properties and applications
- Analytical Chemistry and Chromatography
- Inorganic and Organometallic Chemistry
- Sociology and Education Studies
Technische Universität Berlin
1968-2024
University of Göttingen
2015-2024
Praxis
2023
Universitätsmedizin Göttingen
2021
University of Aveiro
2010-2020
University of Southern Mississippi
2016
Hochschule Aalen
2014-2015
Fernando Pessoa University
2013
Universidade do Porto
2004-2011
Universidade Estadual de Campinas (UNICAMP)
2009
Among new potential solvents for lignocellulosic materials, ionic liquids (ILs) are attracting considerable attention. Hence, the knowledge of thermophysical properties such fluids is essential design related industrial processes. Therefore, in this work, a set properties, namely, density, viscosity, and refractive index, as function temperature, isobaric thermal expansivity heat capacities at constant were determined eight with 1-ethyl-3-methylimidazolium cation combined following anions:...
For the first time, two distinct trends are clearly evidenced for enthalpies and entropies of vaporization along [Cnmim][Ntf2] ILs series. The trend shifts observed Δ(l)(g)H(m)(o) Δ(l)(g)S(m)(o), which occur at [C6mim][Ntf2], related to structural modifications. thermodynamic results reported in present article constitute quantitative experimental evidence percolation phenomenon make a significant contribution better understanding relationship among cohesive energies, volatilities, liquid...
New classes of acidic or basic ionic liquids (ILs) are gaining special attention, since the efficiency many processes can be enhanced by judicious manipulation these properties. The absorption sour gases character IL. fluorination cation anion also contribute to enhance gas solubility. In this work two characteristics evaluated through study gas-liquid equilibrium based on similar anions, 1-butyl-3-methylimidazolium acetate ([C4mim][Ac]) and trifluoroacetate ([C4mim][TFA]), with carbon...
Although specific binding sites for LH-releasing hormone (LHRH) and its analogs have been demonstrated in biopsy samples of human endometrial cancer, their biological significance remains obscure. In this study we evaluated whether LHRH are also present the cancer cell lines HEC-1A Ishikawa if such could mediate antiproliferative effects analogs. Using [125I,D-Trp6]LHRH as a ligand, high affinity/low capacity site was detected both lines: line, dissociation constant (Kd)1 = 5.7 x 10(-9)...
The influence of the cation's central atom in behavior pairs ammonium- and phosphonium-based ionic liquids was investigated through measurement densities, viscosities, melting temperatures, activity coefficients at infinite dilution, refractive indices, toxicity against Vibrio fischeri. All properties are affected by nature, with ammonium-based presenting higher enthalpies. Activity dilution show to present slightly for non-polar solvents, becoming lower polar suggesting that somewhat...
The electron energy-loss spectrum of 25-keV electrons in molecular nitrogen has been re-investigated the 12.5–14.9 eV range with improved energy resolution 10 meV. band intensities b and b′ progressions, which consist bands j, b, m, p, q, b′, g, f, r, s, t as recently turned out, exhibit strong perturbations due to configuration interaction c c′ state, respectively. disturbed intensity progressions is quite analogous one two-electron excitation region helium. Intensity o series, if any,...
In this work, ionic liquids are evaluated for the first time as solvents extraction and entrainers in separation processes involving terpenes terpenoids. For that purpose, activity coefficients at infinite dilution, γ13∞, of terpenoids, [C4mim]Cl, [C4mim][CH3SO3], [C4mim][(CH3)2PO4] [C4mim][CF3SO3] were determined by gas–liquid chromatography six temperatures range 398.15 to 448.15 K. On basis experimental values, a correlation γ13∞ with an increase solubility parameters is proposed. The...
The spectrum of molecular oxygen has been studied in the energy-loss range 6.8–21 eV by means a high-resolution electron spectrometer using 25-keV primary electrons. resulting compared with uv absorption spectrum. In contrast to results for nitrogen, fair agreement is stated disregarding some deviations Schumann–Runge region. At high energy (E > 17 eV) resolution exceeds that Some bands could be grouped new.
Abstract The frequencies are measured of the magnetic excitations (magnons) Rb 2 MnCl 4 and (CH 3 NH ) by means inelastic neutron scattering for [ξ, 0, 0] at 8 K resonance techniques k = 0 various temperatures. From temperature dependence intensity a Bragg peak, experimental values obtained sublattice magnetization those two 2D Heisenberg antiferromagnets. data analyzed theoretically within framework Oguchi's renormalized spin wave theory. parameters (exchange field anisotropy field)...
Abstract Amorphous hydrogenated silicon carbide (a‐SiC:H) films are prepared by magnetron sputtering of crystalline in an argon—hydrogen—methane atmosphere. The specific absorption modes (wagging, rocking, deformation, stretching) the SiC, (CH m ) n C/Si( = 1, 2, 3; 3), and SiH −( 1,2) groups assigned analyzed. composition is determined nuclear reaction techniques. Structural, electrical, optical properties show characteristic changes near alloy a‐Si 1− x C :H, 0.5 which indicate...
The energy-loss spectra of 25-keV electrons transmitted through thin amorphous Ge and Si films have been measured in the range very small energy losses between 25 400 meV. resolution was 4 6 main intensity is located at low caused by "defect-induced" two phonon excitation.
Abstract Hydrogenated amorphous germanium-carbon alloy (a-Ge1-xCx: H) films have been prepared by magnetron sputtering of a Ge target in an argon hydrogen methane atmosphere. The carbon fraction x, determined secondary neutrals mass spectrometry, depended linearly on pressure and was the range × 10−4 ⩽ x 0-4. film properties do not show significant influence carbonation until reaches 0-03. main absorptions features infrared spectra are related to Ge-C, Ge-H C-H vibration modes their...