scholarly journals Thermodynamic properties of a tetramer Ising-Heisenberg bond-alternating chain as a model system forCu(3−Chloropyridine)2(N3)2

2005 ◽  
Vol 72 (2) ◽  
Author(s):  
Jozef Strečka ◽  
Michal Jaščur ◽  
Masayuki Hagiwara ◽  
Kazuhiko Minami ◽  
Yasuo Narumi ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Model System ◽  
Alternating Chain

scholarly journals Characterising Lithium-Ion Electrolytes via Operando Raman Microspectroscopy

2020 ◽  
Author(s):  
Jack Fawdon ◽  
Johannes Ihli ◽  
Fabio La Mantia ◽  
Mauro Pasta
Keyword(s):  
Thermodynamic Properties ◽  
Concentration Gradient ◽  
Electrolyte Concentration ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Transference Number ◽  
Model System ◽  
Raman Microspectroscopy ◽  
Apparent Diffusion ◽  
Li Ion

<div><div><div><p>Knowledge of electrolyte transport and thermodynamic properties in Li-ion and ”beyond Li-ion” technologies is vital for their continued development and success. Here, we present a method for fully characterising electrolyte systems. By measuring the electrolyte concentration gradient over time via operando Raman microspectroscopy, in tandem with potentiostatic electrochemical impedance spectroscopy, the Fickian ”apparent” diffusion coefficient, transference number, thermodynamic factor, ionic conductivity and resistance of charge-transfer were quantified within a single experimental setup. Using lithium bis(fluorosulfonyl)imide (LiFSI) in tetraglyme (G4) as a model system, our study provides a visualisation of the electrolyte concentration gradient; a method for determining key electrolyte properties, and a necessary technique for correlating intermolecular electrolyte structure with the described transport and thermodynamic properties.</p></div></div></div>

scholarly journals Effects of Chickpea Protein on Carbohydrate Reactivity in Acrylamide Formation in Low Humidity Model Systems

Foods ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 167 ◽  
Author(s):  
Karolina Miśkiewicz ◽  
Justyna Rosicka-Kaczmarek ◽  
Ewa Nebesny
Keyword(s):  
Thermodynamic Properties ◽  
Reducing Sugars ◽  
Model System ◽  
Model Systems ◽  
Protein Preparation ◽  
Acrylamide Formation ◽  
Low Humidity ◽  
Egg Yolks ◽  
Hen Egg

Asparagine and reducing sugars are the principal precursors of acrylamide in foods. Their main sources in pastries are flour and hen egg yolks. One method of reducing acrylamide content in food may be to add a chickpea protein preparation. The aim of the study was to determine the effects of the chickpea protein preparation on the thermodynamic properties of carbohydrates and the amount of acrylamide formed in low humidity model systems. In the studied systems, the type and amount of acrylamide precursors and humidity were designed to reflect the parameters typical of shortcrust cookies. In the study, the highest amounts of acrylamide were formed in the reaction between asparagine and fructose and the lowest in the reaction between asparagine and sucrose. Furthermore, the addition of chickpea protein to the analyzed carbohydrate–asparagine model systems reduced the content of acrylamide formed during baking at 180 °C regardless of the type of carbohydrate. The greatest acrylamide reduction (41%) was found in the model system containing fructose.

Thermodynamic Properties From Static-Lattice Calculations with Soft Modes

2002 ◽  
Vol 718 ◽  
Author(s):  
Graeme J. Ackland ◽  
Neil D. Drummond
Keyword(s):  
Phase Space ◽  
Thermodynamic Properties ◽  
Soft Mode ◽  
Model System ◽  
Structure Calculation ◽  
Zero Temperature ◽  
Mode Behavior ◽  
Simple Model System ◽  
Quantum Limits ◽  
Static Lattice

AbstractWhile phase transition pressures and zero temperature thermodynamic properties can be accurately determined from electronic structure calculation, transition temperatures are more problematic because of the need to sample phase space and quantise vibrations. The quasiharmonic method has proved extremely accurate for calculating thermodynamic properties up to 90% of the melting point without explicit phase space sampling for most materials, but has low temperature divergences for soft mode materials such as perovskites. Here we present a modified quasiharmonic method which avoids these difficulties. Using a simple model system, we demonstrate trends of behaviour in both the classical and quantum limits showing the importance of phonon quantisation in soft-mode behavior.

scholarly journals Characterising lithium-ion electrolytes via operando Raman microspectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jack Fawdon ◽  
Johannes Ihli ◽  
Fabio La Mantia ◽  
Mauro Pasta
Keyword(s):  
Thermodynamic Properties ◽  
Concentration Gradient ◽  
Electrolyte Concentration ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Transference Number ◽  
Model System ◽  
Raman Microspectroscopy ◽  
Apparent Diffusion ◽  
Li Ion

AbstractKnowledge of electrolyte transport and thermodynamic properties in Li-ion and beyond Li-ion technologies is vital for their continued development and success. Here, we present a method for fully characterising electrolyte systems. By measuring the electrolyte concentration gradient over time via operando Raman microspectroscopy, in tandem with potentiostatic electrochemical impedance spectroscopy, the Fickian “apparent” diffusion coefficient, transference number, thermodynamic factor, ionic conductivity and resistance of charge-transfer were quantified within a single experimental setup. Using lithium bis(fluorosulfonyl)imide (LiFSI) in tetraglyme (G4) as a model system, our study provides a visualisation of the electrolyte concentration gradient; a method for determining key electrolyte properties, and a necessary technique for correlating bulk intermolecular electrolyte structure with the described transport and thermodynamic properties.

scholarly journals Characterising Lithium-Ion Electrolytes via Operando Raman Microspectroscopy

2020 ◽  
Author(s):  
Jack Fawdon ◽  
Johannes Ihli ◽  
Fabio La Mantia ◽  
Mauro Pasta
Keyword(s):  
Thermodynamic Properties ◽  
Concentration Gradient ◽  
Electrolyte Concentration ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Transference Number ◽  
Model System ◽  
Raman Microspectroscopy ◽  
Apparent Diffusion ◽  
Li Ion

<div><div><div><p>Knowledge of electrolyte transport and thermodynamic properties in Li-ion and ”beyond Li-ion” technologies is vital for their continued development and success. Here, we present a method for fully characterising electrolyte systems. By measuring the electrolyte concentration gradient over time via operando Raman microspectroscopy, in tandem with potentiostatic electrochemical impedance spectroscopy, the Fickian ”apparent” diffusion coefficient, transference number, thermodynamic factor, ionic conductivity and resistance of charge-transfer were quantified within a single experimental setup. Using lithium bis(fluorosulfonyl)imide (LiFSI) in tetraglyme (G4) as a model system, our study provides a visualisation of the electrolyte concentration gradient; a method for determining key electrolyte properties, and a necessary technique for correlating intermolecular electrolyte structure with the described transport and thermodynamic properties.</p></div></div></div>

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

A Protozoan Model for Golgi-Associated Calcification

1971 ◽  
Vol 29 ◽  
pp. 332-333
Author(s):  
D. C. Williams ◽  
D. E. Outka
Keyword(s):  
Golgi Apparatus ◽  
Organic Matrix ◽  
Model System ◽  
Sequential Formation

Many studies have shown that the Golgi apparatus is involved in a variety of synthetic activities, and probably no Golgi product is more elaborate than the scales produced by various kinds of phytoflagellates. The formation of calcified scales (coccoliths, Fig. 1,2) of the coccolithophorid phytoflagellates provides a particularly interesting model system for the study of biological mineralization, and the sequential formation of Golgi products.The coccoliths of Hymenomonas carterae consist of a scale-like base (Fig. 2 and 4, b) with a highly structured calcified (CaCO3) rim composed of two distinct elements which alternate about the base periphery (Fig. 1 and 3, A, B). Each element is enveloped by a sheath-like organic matrix (Fig. 3; Fig. 4, m).

Existence of DNA in yeast microbodies

1978 ◽  
Vol 36 (2) ◽  
pp. 232-233
Author(s):  
Masako Osumi ◽  
Misuzu Nagano ◽  
Hiroko Kazama
Keyword(s):  
Catalase Activity ◽  
Buoyant Density ◽  
Model System ◽  
Contour Length ◽  
Native State ◽  
Normal Alkane ◽  
Remarkable Increase ◽  
Dna Molecule ◽  
Mitochondrial Dnas

We have found that microbodies appeared profusely together with a remarkable increase in catalase activity in normal alkane-grown cells of hydrocarbon-utilizing Candida yeasts, and that the microbodies multiplied by division in these cells. These features of Candida yeasts seem to provide a useful model system for studies on the biogenesis of the microbody. Subsequently, we have succeeded in isolation of Candida microbodies in an apparently native state, as judged biochemically and morphologically. The presence of DNA in the purified microbody fraction thus obtained was proved by the diphenylamine method. DNA molecule of about 15 urn in contour length was released from an isolated microbody. The physicochemical analyses of the microbody DNA revealed that its buoyant density differed from nuclear and mitochondrial DNAs. All these results lead us to the possibility that there is a novel type of DNA in microbodies.

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