C/SiC Ceramic Matrix Composites with Extraordinary Thermomechanical Properties up to 2000 °C.

The thermomechanical properties of carbon fiber reinforced silicon carbide ceramic matrix composites (C/SiC CMCs) were studied up to 2000 °C using high-temperature in situ flexural testing in argon. The CMC specimens were fabricated using an ultrahigh concentration (66 vol%) aqueous slurry containing nano-sized silicon carbide powder. The SiC powder compacts were obtained by drying the slurry and were densified using the precursor impregnation and pyrolysis (PIP) method with field assisted sintering technology/spark plasma sintering (FAST/SPS).

The Critical Role of Fillers in Composite Polymer Electrolytes for Lithium Battery.

With excellent energy densities and highly safe performance, solid-state lithium batteries (SSLBs) have been hailed as promising energy storage devices. Solid-state electrolyte is the core component of SSLBs and plays an essential role in the safety and electrochemical performance of the cells. Composite polymer electrolytes (CPEs) are considered as one of the most promising candidates among all solid-state electrolytes due to their excellent comprehensive performance.

The nature of the polar covalent bond.

Quantum chemical calculations using density functional theory are reported for the diatomic molecules LiF, BeO, and BN. The nature of the interatomic interactions is analyzed with the Energy Decomposition Analysis-Natural Orbitals of Chemical Valence (EDA-NOCV) method, and the results are critically discussed and compared with data from Quantum Theory of Atoms in Molecules, Natural Bond Orbital, and Mayer approaches. Polar bonds, like nonpolar bonds, are caused by the interference of wave functions, which lead to an accumulation of electronic charge in the bonding region.

Design, Synthesis and Biological Evaluation of Coumarin Derivatives as NEDD8 Activating Enzyme Inhibitors in Pancreatic Cancer Cells.

Background: NEDD8 (neural precursor cell expressed developmentally downregulated protein 8) is one of the ubiquitin-like proteins which is activated by the NEDD8 activating enzyme (NAE). The overexpressed NAE can cause a variety of diseases such as numerous cancer types and inflammatory diseases. The selective inhibition of NAE could mediate the rate of ubiquitination and the subsequent degradation of proteins associated with cancer so as to achieve the purpose of treatment.

AgCO-Catalyzed H/D Exchange of Five-Membered Heteroarenes at Ambient Temperature.

AgCO-catalyzed hydrogen isotope exchange of five-membered heteroarenes is disclosed. The reaction can be conducted in the open air, at ambient temperature, and with DO as deuterium source. Moreover, this protocol showed orthogonal site selectivity to existing technology, thereby greatly expanding the scope of substrates for HIE reaction.

Intervention Effect of Repetitive TMS on Behavioral Adjustment After Error Commission in Long-Term Methamphetamine Addicts: Evidence From a Two-Choice Oddball Task.

Behavioral adjustment plays an important role in the treatment and relapse of drug addiction. Nonetheless, few studies have examined behavioral adjustment and its plasticity following error commission in methamphetamine (METH) dependence, which is detrimental to human health. Thus, we investigated the behavioral adjustment performance following error commission in long-term METH addicts and how it varied with the application of repetitive transcranial magnetic stimulation (rTMS) of the left dorsolateral prefrontal cortex (DLPFC).

APP upregulation contributes to retinal ganglion cell degeneration via JNK3.

Axonal injury is a common feature of central nervous system insults. Upregulation of amyloid precursor protein (APP) is observed following central nervous system neurotrauma and is regarded as a marker of central nervous system axonal injury. However, the underlying mechanism by which APP mediates neuronal death remains to be elucidated.

Enhanced valley splitting in monolayer WSe due to magnetic exchange field.

Exploiting the valley degree of freedom to store and manipulate information provides a novel paradigm for future electronics. A monolayer transition-metal dichalcogenide (TMDC) with a broken inversion symmetry possesses two degenerate yet inequivalent valleys, which offers unique opportunities for valley control through the helicity of light. Lifting the valley degeneracy by Zeeman splitting has been demonstrated recently, which may enable valley control by a magnetic field.

Microbial diversity of different modified atmosphere packed pot-stewed duck wings products during 8°C storage.

Unlabelled: The objective of this study was to investigate the effect of spices and packaging films on the bacterial dynamics of pot-stewed duck wings (PSDW) during storage at 8°C. The results showed that spices added at a 1 : 1 ratio (weight ratio of pungent spices and fragrant spices) could delay the lag period of bacterial growth and extend the shelf-life of PSDW. Denaturing Gel Gradient Electrophoresis (DGGE) analysis indicated that the predominant bacteria in PSDW at the end of storage were Weisella hellenica, Weisella diestrammenae, Staphylococcus equorum and Streptococcus parauberis, and spices added at a 1 : 1 ratio showed better inhibition for bacteria at the end of storage, except for W.