Article
Chemistry, Physical
Wojciech Marczak
Summary: The paper discusses the calculation of characteristic acoustic impedance in liquid mixtures, highlighting the importance of thermodynamically correct formulas and illustrating substantial differences with conventional methods through four examples.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Physics, Fluids & Plasmas
A. V. Filippov
Summary: The thermodynamic stability of a multicomponent plasma is studied using Ornstein-Zernike integral equations. A transition is made to the one-component Ornstein-Zernike equation for the most non-ideal subsystem. It is shown that all pair correlation functions remain positive for the studied range of the non-ideality parameter. The conditions for the violation of thermodynamic stability of a three-component dusty plasma are investigated for different charge signs and number densities of the dust particles.
PLASMA PHYSICS REPORTS
(2023)
Article
Astronomy & Astrophysics
Dukjae Jang, Youngshin Kwon, Kyujin Kwak, Myung-Ki Cheoun
Summary: The study proposes a correction to the standard BBN scenario, suggesting that a deviation of the primordial plasma from the ideal state could resolve the primordial lithium problem by deviating from the Planck distribution.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Optics
S. A. Khrapak, S. A. Trigger
Summary: The optical properties of non-ideal completely ionized plasma are discussed using the kinetic theory approach. A modification of the Coulomb logarithm improves the theoretical description of the dynamical conductivity and optical properties of moderately non-ideal plasma. Analytical results for refractive index, absorption, and reflection coefficients can be used for practical calculations. Comparison between experimental and theoretical results for reflectivity is discussed.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Mechanics
Volker W. Elling
Summary: For an ideal non-polytropic gas, shock polars have a unique critical shock that is always transonic. Temperature, pressure, energy, enthalpy, normal mass flux, and entropy increase along the forward Hugoniot curves, while speed and Mach number decrease along the entire polar. Non-convex equations of state can lead to multiple critical shocks, causing theoretical problems and practical risks.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Claudio Cremaschini
Summary: Non-ideal fluids with pressure anisotropy effects are studied in the relativistic systems. The case of magnetized jet plasmas at equilibrium is considered, and a theoretical framework based on covariant statistical kinetic approach is implemented to calculate the system continuum fluid fields. The generation of temperature anisotropy is identified with magnetic moment conservation, and the non-isotropic pressure tensor is obtained by the analytical calculation of the fluid 4-flow and stress-energy tensor.
Article
Chemistry, Physical
Manjari Chakraborty, Sahadev Barik, Amita Mahapatra, Moloy Sarkar
Summary: The study investigated the properties of three different mixtures with a common anion through thermophysical properties, fluorescence measurements, and NMR techniques. The results indicated that the excess molar volume in imidazolium-based IL-IL mixtures might be linked to the alkyl chain of the imidazolium cation, and lowering of density in pyrrolidinium IL mixtures could give rise to free volume. The presence of free volume in the mixtures was supported by time-resolved fluorescence and NMR studies, showing deviations from ideal behavior.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Mathematical
Daniel Alexander Weiss
Summary: By analyzing the thermodynamic limit, we can study the phase structure of a Bose gas and the phenomenon of Bose-Einstein condensation. The coefficients of the asymptotic expansion can be used to calculate thermodynamic observables.
JOURNAL OF MATHEMATICAL PHYSICS
(2022)
Article
Chemistry, Physical
Chao-Wen Wang, Jun Wang, Yu-Song Liu, Ji Li, Xiao-Long Peng, Chun-Sheng Jia, Lie-Hui Zhang, Liang-Zhong Yi, Jian-Yi Liu, Chang-Jun Li, Xu Jia
Summary: The study introduces suitable analytical representations for the ideal-gas Gibbs free energy and entropy of water, which accurately predict values in agreement with experimental data. This novel approach provides a pathway for treating the anharmonic vibrations of water molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Polina V. Zhdanova, Alexander A. Lomzov, Daria V. Prokhorova, Grigory A. Stepanov, Alexander A. Chernonosov, Vladimir V. Koval
Summary: This article investigates the thermodynamics of the interaction between Cas9-RNA and DNA/DNA duplex and reveals its importance in the CRISPR-Cas9 system. The study findings suggest that the small energetic preference during Cas9-RNA/DNA formation may play a crucial role in sequence-specific recognition.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Mechanics
Paolo Gajoni, Alberto Guardone
Summary: This article investigates the properties of two-dimensional compressible flows in radial equilibrium, considering both ideal and non-ideal conditions. The study derives a differential relation for the Mach number dependency on the radius and analytically integrates it for ideal flows. Numerical simulations confirm the predicted flow evolution from uniform flow conditions to the radial equilibrium profile.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Madhusmita Tripathy, Viktor Klippenstein, Nico F. A. van der Vegt
Summary: In this study, a new method of applying coarse-grained (CG) simulation models to multi-component molecular systems was investigated to represent structural, thermodynamic, and dynamic properties. The effectiveness of the method was validated through comparisons with fine-grained (FG) reference systems.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Biotechnology & Applied Microbiology
Marko Popovic, Gavin B. G. Stenning, Axel Goettlein, Mirjana Minceva
Summary: The detailed elemental analysis and low-temperature calorimetric measurement results were reported for Gram-positive bacteria, Gram-negative bacteria, and mold fungi for the first time. The study calculated the microorganism unit carbon formulas and found different standard molar heat capacity and entropy values for various microorganisms. The study compared the measured heat capacities to predictions of Kopp's rule and Hurst-Harrison equation, and the measured entropies to predictions of Battley and Roels models, showing that the Battley model was more accurate in predicting the microorganism entropies.
JOURNAL OF BIOTECHNOLOGY
(2021)
Article
Thermodynamics
Mustafa Ilhan
Summary: The molar heat capacity parameters of CdNb2O6 and CdTa2O6 oxides were measured using DSC, and their thermodynamic functions were calculated. The results indicate that they follow the Neumann-Kopp rule at both room temperature and high temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Matthew Jura, Marvin Bishop
Summary: This paper computes the scattering functions of nine generations of ideal tri-functional comb and dendrimer polymers using novel graph techniques. The properties of polymers with 9 to 3069 branches are explored. The g-ratios and scattering functions indicate that as the number of branches increases, comb polymers behave more like linear polymers with half the number of branches, while dendrimers become more like spherical objects.
JOURNAL OF CHEMICAL PHYSICS
(2023)
