A5035578570- Phase Equilibria and Thermodynamics
- Chemical Thermodynamics and Molecular Structure
- Thermodynamic properties of mixtures
- Biblical Studies and Interpretation
- Theology and Canon Law Studies
- Analytical Chemistry and Chromatography
- Psychoanalysis and Social Critique
- Historical, Literary, and Cultural Studies
- Liquid Crystal Research Advancements
- Sociology and Education Studies
- German Literature and Culture Studies
- Adsorption, diffusion, and thermodynamic properties of materials
- Reformation and Early Modern Christianity
- Spectroscopy and Quantum Chemical Studies
- Ionic liquids properties and applications
- Historical and Religious Studies of Rome
- Thermal and Kinetic Analysis
- Crystallization and Solubility Studies
- Catalysis and Oxidation Reactions
- Photochemistry and Electron Transfer Studies
- Material Dynamics and Properties
- European history and politics
- Libraries and Information Services
- Chemical and Physical Properties in Aqueous Solutions
- German History and Society
University of Freiburg
2004-2023
Institut für Psychologische Psychotherapie
2018-2023
HES-SO University of Applied Sciences and Arts Western Switzerland
2018-2022
Hochschule Aalen
2008-2022
Goethe Institute
2013
Wittenberg University
2012-2013
Klinikum Saarbrücken
2013
Yeungnam University
2008
University of Kaiserslautern
2005-2008
Robert Bosch (Germany)
2007
Abstract In supercritical fluid chromatography (SFC) compressed gases in the region of their critical temperature are used as mobile phases. SFC has important advantages over gas (GC) for separation low‐volatile or thermally unstable substances. Like high pressure liquid (HPLC) and gel chromatography, it is various special applications preparative separations, e.g. petroleum industry oligomers. great interest fundamental research on extraction determination physicochemical properties...
Abstract Binary diffusion coefficients D 12 have been determined for benzene, n‐propylbenzene and 1,3,5‐trimethylbenzene in supercritical CO 2 at 40°C from 80 to 160 bar additionally between 35 55°C 110 130 with the chromatographic broadening technique (CBT). The effect of secondary flow was investigated. observed binary are order · 10 −4 cm s −1 . For a pressure rise bar, decrease by about 50%. isobaric temperature dependence is substantially higher than that bar; constant densities ρ,...
A DTA apparatus is applied to the calorimetric investigation of phase behaviour (especially rotational transition) 13 n-alkanes containing 9, 11, 12, 13, 15, 17, 18, 19, 21, 24, 25, 27, and 31 carbon atoms as well binary system nonadecane/heneicosane up 3000 bar. The pressure transmitting gas has be prevented from being dissolved in substances, otherwise will completely changed. measurements allow a rough calculation latent heats volume changes involved with transition. From these data...
Abstract In einer Hochdruckmeßzelle mit Fenstern aus farblosem, synthetischem Saphir wurden durch direkte Beobachtung die Phasengleichgewichte flüssig/flüssig, flüssig/gasförmig und flüssig/fest für binären Systeme n‐Octan/CO 2 , n‐Undecan/CO n‐Tridecan/CO n‐Hexadecan/CO bis zu Drücken von 1500 bar (mit vereinzelten Meßdaten 3000 bar) untersucht Teile der kritischen Kurven Gleichgewichte flüssig/flüssig bestimmt. Während kritische p(T)‐Kurven das Phasengleichgewicht besitzen, vom Punkt des...
Brain-computer interfaces (BCIs) require demanding numerical computations to transfer brain signals into control driving an external actuator. Increasing the computational performance of BCI algorithms carrying out these calculations enables faster reaction user inputs and allows using more decoding algorithms. Here we introduce a modular extensible software architecture with multi-threaded signal processing pipeline suitable for applications. The load latency (the time that system needs...
In March 2019, German-speaking scientists and scholars calling themselves Scientists for Future , published a statement in support of the youth protesters Germany, Austria, Switzerland (Fridays Future, Klimastreik/Climate Strike) verifying scientific evidence that protestors refer to. this article, they provide full text statement, including list supporting facts (in both English German) as well an analysis results impacts statement. Furthermore, reflect on challenges who feel dual...
Abstract Binary diffusion coefficients D12 have been determined for benzene, phenol, naphthalene and caffeine in supercritical CO2 at 40°C between 80 160 bar using the chrpmatographic peak-broadening method (CPB). The observed are of order 10−4 cm2/s decrease by about 50% a pressure rise from to bar. For effect temperature on was investigated 35 60°C constant C02 density 0.6 g/cm3; energy activation found be 4.7 kJ/mol, With increasing molecular size polarity diffusing compound, adsorption...
Abstract Using the Redlich‐Kwong equation of state (RK‐equation) thermodynamic relations are derived from which phase equilibria and critical phenomena in fluid binary systems can be calculated at high pressures. From these p‐T diagrams p‐x for mixtures with components differing considerably structure, molecular size and/or polarity (80K to 500 K; up 3 kbar); quadratic mixing rules assumed two parameters RK‐equation. All kinds hitherto known represented reasonably good agreement experimental data.
Abstract The present review considers some physicochemical properties of fluid mixtures that are importance for extraction and supercitical chromatography (SFC). Firstly, the important types phase diagrams treated, occurrence solid phases also being considered in simple cases. Specific examples given a highly volatile component I ( e.g. CO 2 , C H 6 ) with relatively involatile II squalane) very different molecular size, shape, structure, and/or polarity, it is shown how rather complicated...
Abstract Three different types of two‐phase equilibria have to be considered in fluid mixtures: liquid‐gas, liquid‐liquid, and gas‐gas equilibria. The pressure dependence critical phenomena these kinds phase will shortly reviewed recent data presented: since mainly high‐pressure work, say above 300 bar up several kbar, discussed, liquid‐liquid particular considered. New developments during years shown that the limits between three forms equilibrium mixtures are not well defined at high...
ADVERTISEMENT RETURN TO ISSUEPREVArticlePartial molar volumes of naphthalene and fluorene at infinite dilution in carbon dioxide near its critical pointU. Van Wasen G. M. SchneiderCite this: J. Phys. Chem. 1980, 84, 2, 229–230Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.acs.org/doi/10.1021/j100439a024https://doi.org/10.1021/j100439a024research-articleACS PublicationsRequest reuse permissionsArticle...