Information about molecular interactions in DNA can be obtained from experimental melting temperature data by using mesoscopic statistical physics models. Here, we extend the technique to RNA and show that the new parameters correctly reproduce known properties such as the stronger hydrogen bonds of AU base pairs. We also were able to calculate a complete set of elastic constants for all 10 irr...

Available information concerning the elastic moduli of refractory carbides at temperatures (T) relevance for practical applications is sparse and/or inconsistent. We carry out ab initio molecular dynamics (AIMD) simulations T = 300, 600, 900, and 1200 K to determine temperature-dependences constants rocksalt-structure (B1) TiC, ZrC, HfC, VC, TaC compounds as well multicomponent high-entropy (Ti...

Discovering the mechanical properties of biological composite structures at the Nano-scale is much interesting today. Top Neck mollusk shells are amongst biomaterials Nano-Composite that their layered structures are composed of organic and inorganic materials. Since the Nano indentation process is known as an efficient method to determine mechanical properties like elastic modulus and hardness ...

Abstract The use of high-frequency (HF) generators for HF surgical treatment biological tissue has become an indispensable part today's applications all kinds. Generally, alternating electric currents between 300 kHz and 1 MHz are used to induce hemostasis by heating at the cellular level. This effect can be attributed Joule heating, in which a current dissipated conductor converts electrical e...

Abstract: A pulse-echo technique, based on ultrasonic "long-bar" mode (LBM) velocity measurements, working up to 1700°C is described. Magnetostrictive transducers and ultrasonic lines used in a 40-85 kHz frequency range are detailed. The conditions of choice of fundamental parameters (frequency, line geometry, sample size) are discussed in relation with the nature and the microstructure of ...

An analysis of mixed convective MHD visco-elastic flow with heat and mass transfer from a vertical plate in presence of ohmic heating and viscous dissipation has been presented. The governing equations of the momentum, thermal and concentration fields are solved by perturbation technique. Expressions for velocity, temperature, concentration profiles and non-dimensional skin-friction coefficient...

The estimation of temperature-dependent thermal expansion coefficient (TEC) of graphene is quite challenging. There exist significant disagreements within theoretical calculations and equally with the experimental estimates of this quantity, both with reference to the magnitude and sign of the TEC. The difficulty in the estimation broadly arises from the fact that not only can graphene expand o...