Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A mild procedure has been developed for the O-alkylation of 2-hydroxynaphthoquinones by using phase-transfer catalysts. Optimal yields were obtained when 18-crown-6 (10 mol%) and tetrabutylammonium iodide (10 mol% ) were used as cocatalysts in refluxing tetrahydrofuran containing potassium carbonate. Variability in t…
This article examines the chemical reaction pathways of stable neutral species in fluorocarbon plasmas. Octafluorocyclobutane (c-C4F8) inductively coupled plasma discharges were found to primarily produce stable and metastable products downstream from the discharge, including c-C4F8, C2F4, C2F6, CF4, C3F8, C4F10, C3F6…
The theoretical foundations for the characterization of the properties of solids were devised by Robert Hooke (1635-1703). Hooke observed that, for small elongations, the amount of elongation of a spring, ΔL, was directly proportional to the applied force. This observation is expressed mathematically as Hooke’s law: F…
The development of Ni/Au contacts to Mg-doped GaN nanowires (NWs) is examined. Unlike Ni/Au contacts to planar GaN, current-voltage (I-V) measurements of Mg-doped nanowire devices frequently exhibit a strong degradation after annealing in N(2)/O(2). This degradation originates from the poor wetting behavior of Ni and…
A 3-D dynamic analysis of an entire structure is used to determine the effects of an explosion and the response of a structure. Damage to the structure is assessed accordingly, firstly by the angle of rotation of the middle axis/surface, and secondly by the limit internal forces of the selected structure. The extreme…
Corrosion of steel in concrete is an electrochemical process and electrochemical techniques have been used to control corrosion. The simplest of these techniques is galvanic protection. In this case a galvanic anode is connected to the steel and the anode corrodes while delivering a protection current to the steel. An…
Silver is used worldwide in dressings for wound management. Silver has demonstrated great efficacy against a broad range of microorganisms, but there is very little data about the systemic absorption and toxicity of silver in vivo. In this study, the antimicrobial effect of the silver-coated dressing (SilverCoat(®)) w…
Abstract The design and synthesis of new light‐activated contrast agents for theranostics (therapy/diagnosis) has the potential to facilitate multifunctional and improved personalized medicine. The use of light as a remote activation strategy provides spatial and temporal control of drug effect and nanotechnology can…
Induction hardening is a key manufacturing process in the production of ductile iron automotive camshafts. Its desirable features include low-cost, a wearresistant surface, and ease of manufacturing. Due to the asymmetrical geometry of the camshaft, induction hardening generates non-uniform heating/cooling which leads…
Abstract Unusual magnetoresistance observed in weak itinerant ferromagnetic metal Fe0.9Co0.1Si is addressed. We invoke localization effects significantly contributing to the positive magnetoresistance apart from quantum interference effects (QIE), a new mechanism for magnetoresistance at low temperatures. QIE are domi…
The objective of this study was to compare gelatinization properties and molecular composition of starches extracted from locally grown organic and conventional spelt using thermal, rheological, and SEC analyses, along with Concanavalin A method. Organic and conventional spelt was planted in six replicated plots, and…
Galvanic replacement (GR) reactions involving active-metal nanoparticles (NPs) as seeds have a number of distinctive features and can produce various noble-metal nanoparticles. The oxide layer on the surfaces of such active-metal seeds may make a remarkable impact on the final products. Taking the Zn/Cu(2+) system as…
In the fiber-reinforced resin matrix composites, the “interphase” is an important component. And the “cohesive element” is usually used to characterize the mechanical properties of “interphase” in numerical models based on the general finite element software ABAQUS. But the corresponding parameters of it are difficult…
Density functional theory has been employed to investigate the deformation behaviors of glassy Fe-Si-B model systems prepared by ab initio molecular dynamics. The atomistic deformation defects which are closely related to the local dilation volumes or excess volumes and unstable bonding have been systematically analyz…
Catalytic atom maps (CAMs) are minimal models of enzyme active sites. The structures in the Protein Data Bank (PDB) were examined to determine if proteins with CAM-like geometries in their active sites all share the same catalytic function. We combined the CAM-based search protocol with a filter based on the weighted…
Ru(3)(TSA)(6) (1; H(2)TSA=2-thiosalicylic acid), which bears six peripheral carboxylate groups and was isolated in the form [NEt(4)](1.5)[Ru(3)(HTSA)(2)(TSA)(4)](OAc)(0.5)·3.5H(2)O, serves as a building block for assembly of heterometallic coordination polymers. Treatment of 1 with [Fe(acac)(3)] (acac=acetylacetonate)…
A novel metamaterial-inspired loop antenna is proposed towards wideband operation, size reduction and frequency scanning capabilities. The high permeability characteristic of split rings resonators (SRRs) is utilised to reduce the size of a loop antenna. The SRRs also improve the impedance matching of the loop antenna…
Spectroscopic and viscosity methods were applied to investigate the interaction between methylene blue (MB)-Sm(III) complex and herring sperm DNA by using acridine orange as a spectral probe in Tris-HCl buffer (pH 7.40). By means of molar ratio method, the binding ratios between MB-Sm(III) and DNA were determined as n…
The scandium oxydifluoride free radical, OScF(2), is produced by the spontaneous, specific reaction of laser ablated Sc atoms with OF(2) in solid argon and characterized by using matrix infrared spectroscopy and theoretical calculations. The OScF(2) molecule is predicted to have C(2v) symmetry and a (2)B(2) ground sta…
Here we present a structural study of pentacene (Pn) thin films on vicinal Ag(111) surfaces by He atom diffraction measurements and density functional theory (DFT) calculations supplemented with van der Waals (vdW) interactions. Our He atom diffraction results suggest initial adsorption at the step edges evidenced by…