Predicting the Lattice Thermal Conductivity in Nitride Perovskite LaWN from ab initio Lattice Dynamics.

Using a density functional theory-based thermal transport model, which includes the effects of temperature (T)-dependent potential energy surface, lattice thermal expansion, force constant renormalization, and higher-order quartic phonon scattering processes, it is found that the recently synthesized nitride perovskite LaWN displays strong anharmonic lattice dynamics manifested into a low lattice thermal conductivity (κ ) and a non-standard κ ∝T dependence. At high T, the departure from the standard κ ∝T law originates in the dual particle-wave behavior of the heat carrying phonons, which includes vibrations tied to the N atoms. While the room temperature κ =2.

Four-phonon and electron-phonon scattering effects on thermal properties in two-dimensional 2H-TaS.

Thermal transport characteristics of monolayer trigonal prismatic tantalum disulfide (2H-TaS) are investigated using first-principles calculations combined with the Boltzmann transport equation. Due to a large acoustic-optical phonon gap of 1.85 THz, the four-phonon (4ph) scattering significantly reduces the room-temperature phononic thermal conductivity ().

Cytotoxicity Effect of Iron Oxide (FeO)/Graphene Oxide (GO) Nanosheets in Cultured HBE Cells.

Iron oxide (FeO), a classical magnetic material, has been widely utilized in the field of biological magnetic resonance imaging Graphene oxide (GO) has also been extensively applied as a drug carrier due to its high specific surface area and other properties. Recently, numerous studies have synthesized FeO/GO nanomaterials for biological diagnosis and treatments, including photothermal therapy and magnetic thermal therapy. However, the biosafety of the synthesized FeO/GO nanomaterials still needs to be further identified.

Interferon-alpha-2b and ribavirin for retreatment of chronic hepatitis C.

Background/aims: Subjects with chronic hepatitis C who fail treatment with interferon-alpha are generally divided into two groups: "relapsers" who normalized serum aminotransferase activity and have undetectable viral RNA during treatment and "non-responders" who do not achieve these results. The aim of this study was to examine retreatment of such subjects.

Methodology: We studied 117 subjects with chronic hepatitis C who failed treatment with interferon-alpha, 87 of whom were "non-responders" and 30 "relapsers.