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。
Abstract The stability of a variety of bidentate N‐base adducts of MoO 2 Cl 2 and (CH 3 )ReO 3 (MTO) was investigated in thf and CH 2 Cl 2 as solvents. The formation constants were determined from the spectrophotometric data based on 1:1 adduct formation. The adduct formation constants for [MoO 2 Cl 2 L 2 ] (L 2 = bid…
Abstract ~Small amounts of antimony shifts the thermal stability range of ht‐Cu 6 Sn 5 . To make this phase stable at room temperature, and easily accessible by prolonged annealing, a model previously suggested for the ht‐phase is shown to be entirely correct in this single crystal study.
Abstract In this work, the enzyme‐catalyzed degradation of hyperbranched polyesters (HBPEs) was investigated. Enzymatic degradation experiments were performed in a phosphate buffer in the presence of the lipases Candida cylindracea , Pseudomonas cepacia , Novozym 388, Amano CE, Lipomod 34P, and Cal‐B, whereas control…
Most dUTP pyrophosphatases (dUTPases) are homotrimers with interfaces formed between subunit surfaces, in the central channel, and by C-terminal beta-strand swapping. Analysis of intersubunit interactions reveals an important cohesive role for the C-terminus. This is reflected in the crystal structure of fruitfly dUTP…
13 C MAS NMR spectroscopy of isotopically enriched samples of the layered double hydroxide hydrotalcite (HT) [(Mg 2 Al)(OH) 6 A −, n H 2 O, where A − is a counteranion that may bear different charges] exchanged with glutamate (Glu) shows an unexpected preferential adsorption of the lower-charged species (Glu 1− ) rela…
The structural properties of the $A{\text{Fe}}_{2}{\text{As}}_{2}$ $(A=\text{Sr},\text{Ca})$ compounds have been extensively analyzed by transmission electron microscopy (TEM) from room temperature down to 20 K. The experimental results demonstrate that the ${\text{SrFe}}_{2}{\text{As}}_{2}$ compound, consistent with…
An effective method has been developed to remove ferromagnetic metals for the large scale purification of single-walled carbon nanotubes (SWNTs) produced by arc-discharge, which are generally regarded as the most challenging soot to remove metallic catalyst residues. The efficiency of the method has been evaluated by…
On the basis of the momentum-balance equation derived from the Boltzmann equation in which electron interactions with impurities and acoustic and optic phonons are included, we examine the dependence of the resistivity in graphene on temperature and electron density. Simple analytical expressions for the different con…
Abstract Ethylene vinyl acetate (EVA, 18 mol % vinyl acetate) and epoxidized natural rubber (ENR, 50 mol % epoxidation) were blended in an internal mixer and compared to EVA. Dicumyl peroxide (DCP) was used as a curing agent. The blends consisted of 10–50 wt % of ENR and were compared with crosslinked EVA in terms of…
Abstract Microfibrillar‐reinforced elastomer composites based on two dispersed phases, liquid crystalline polymer (LCP) and recycled poly(ethylene terephthalate)(rPET), and styrene‐(ethylene butylene)‐styrene (SEBS) were prepared using extrusion process. The rheological behavior, morphology, and thermal stability of S…
Abstract Mit erhobenem Stachel : Ein enantiomerenreiner Neodymkomplex (siehe Schema) wirkt als effizienter Initiator für eine kontrollierte Ringöffnungspolymerisation von rac ‐Lactid zu einem isotaktischen Polyester. Der Heteroskorpionatkomplex wurde spektroskopisch und durch eine Röntgenstrukturanalyse charakterisier…
Abstract In this work, we demonstrate nano‐structured silver particles photo‐reduced from silver nitride (AgNO 3 ) solution using visible‐light‐activated titanium dioxide (TiO 2 ), which can be a convenient and effective substrate for surface enhanced Raman spectroscopy (SERS) observation. Visible‐light‐activated carb…
Abstract In a row: Chemical concepts from the spin‐polarized conceptual DFT field are used to explain the spectrochemical and nephelauxetic series within a group of ruthenium complexes. magnified image The spectrochemical and nephelauxetic series are analyzed within the context of spin‐polarized conceptual DFT. For a…
We performed first-principles calculations of multiplet structures and the corresponding ground-state absorption and excited-state absorption spectra for ruby $({\text{Cr}}^{3+}:\ensuremath{\alpha}{\text{-Al}}_{2}{\text{O}}_{3})$ and alexandrite $({\text{Cr}}^{3+}:{\text{BeAl}}_{2}{\text{O}}_{4})$ which included latti…
In an attempt to develop a biofriendly sol-gel route for the rapid formation of biofunctional silica gels, a biopolymer with good biocompatibility was used to assist the gelation of glycol-modified tetraethoxysilane (GMT) in aqueous system without the addition of any organic solvents. It was found that the biopolymer…
A dinuclear nickel(II) complex, [Ni2(MOBPT)2(N3)4] · 2H2O (MOBPT = 4-(p-methoxyphenyl)-3,5-bis(pyridine-2-yl)-1,2,4-triazole), has been synthesized and characterized by elemental analysis, UV, IR, ESI-MS, and single crystal X-ray crystallography. The complex crystallizes in triclinic system, space group P 1 with a = 9…
In this work we report a new thermochemical method for the synthesis of ZnS:Mn nanocrystals. Zn(NO(3))(2) and Na(2)S(2)O(3) were used as the precursors and Mn(NO(3))(2) was the source of impurity. Thioglycerol (TG,C(3)H(8)O(2)S) was also used as the capping agent and the catalyst of the reaction. Na(2)S(2)O(3) is a he…
We demonstrate the fabrication and testing of a prototype microtome knife based on a multiwalled carbon nanotube (MWCNT) for cutting approximately 100 nm thick slices of frozen-hydrated biological samples. A piezoelectric-based 3D manipulator was used inside a scanning electron microscope (SEM) to select and position…
The magnetic properties, magnetic entropy change, and hysteresis loss in LaFe11.7(Si1−xCux)1.3 compounds were investigated. It was found that the compounds retain the cubic NaZn13 structure when the substitution of Cu reaches 20%. With increasing Cu content from x=0 to 0.2, the Curie temperature TC increases from 185…
In this paper a generalization of a stress-dependent magnetostriction phenomenological model is presented. The model makes use of a classical Preisach operator and of a memoryless bivariate function and includes a pure elastic contribution. It is shown that, even if the structure of the model is simple, the operator s…