Materials Literature
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Perylene derivatives are industrially important pigments used not only as colorants, but also as materials for optical disks and photoconductors for electrophotographic photoreceptors. These pigments cover a variety of shades in the solid state from vivid red, via maroon to black, although their molecular absorption s…
The FTIR spectra were measured for raw Uplands Sicala-V2 cotton fibers over a temperature range of 40-325 degrees C to explore the temperature-dependent changes in the hydrogen bonds of cellulose. These cotton-cellulose spectra exhibited complicated patterns in the 3800-2800 cm(-1) region and thus were analyzed by bot…
In the fabrication process of Ni / Y 2 O 3 ZrO 2 (YSZ) cermet anodes for solid oxide fuel cells, it has been found that sintering and reducing processes of the cermet anodes at high temperatures (1000 to 1400°C) cause significant grain growth and agglomeration of YSZ and in particular Ni particles. This paper report…
Aqueous dispersions of a regioregular polythiophene, bearing enantiomerically pure oligo(ethylene oxide) side chains, are obtained by injecting small volumes of a THF solution of the polymer into water. The interplay of hydrophilic and hydrophobic interactions accounts for the unprecedented formation of hexagonal plat…
Diethyl fumarate and propylene glycol were reacted in the presence of a zinc chloride catalyst to synthesize poly(propylene fumarate) (PPF) over a period of 12 hours. The kinetics of the transesterification polymerization at 130 degrees C, 150 degrees C, and 200 degrees C were determined by gel permeation chromatograp…
The effect of trace boron in steels, especially the influence of boron on microstructure and properties of low carbon bainitic steels were summarized. It was pointed out that the hardenability of boron steels is determined by non-equilibrium boron segregation on grain boundaries. The synergistic effect of boron with o…
A dynamic covalent polymer incorporating thermally alkoxyamine units in the main chain was synthesized. Due to a radical crossover reaction between the alkoxyamine units, an interchange of the main chains in poly(alkoxyamine ester) was observed on heating.
Cobalt ferrite nanowires with an average diameter of 50 nm and lengths up to several micrometers were synthesized inside carbon nanotubes under mild reaction conditions using the confinement effect provided by the carbon tubular template.
Book Review| January 01 2002 Environmental Science Eye of the CyclopsBioMedia AssociatesBackyard Biodiversity (EC 108) The American Biology Teacher (2002) 64 (1): 70. https://doi.org/10.2307/4451239 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter L…
The synthesis and properties of a novel set of building blocks for the preparation of self-assembling biomaterials are described. These molecules consist of a relatively short oligo( l -lactic acid) n̄ segment ( n̄ = 10−40) that is substituted with a cholesterol moiety as an end group and in some cases has a second bi…
Various ABA-type tri-block copolymers composed of poly(L-lactide) (PLA) or poly (lactide-co-glycolide) (PLGA) as the side A block and poly(epsilon-caprolactone) (PCL) as the middle B block were synthesized to produce rapidly degrading elastic matrices useful for tissue engineering scaffolds. The terminal di-hydroxyl g…
The novel framework [{Co(en)2}2SbIII8VIV14O42(H2O)]·6H2O is composed of two-dimensional arrays of {SbIII8VIV14O42(H2O)} clusters interlinked via {Co(en)2} bridging groups; such antimony–vanadium clusters with antimony and vanadium in low oxidation states were previously unknown.
Results are presented for the self-diffusion properties of monodisperse n-alkanes and cis-1,4 polyisoprene (PI) oligomer melts, as obtained through detailed atomistic molecular dynamics (MD) simulations. The simulations have been conducted in the NVT statistical ensemble on model systems thoroughly pre-equilibrated th…
The friction and wear behavior of amorphous diamond-like nanocomposite (DLN) coatings (C:H:Si:0) in low speed, dry sliding contact has been investigated using a home-built in situ tribometer. Tests were performed under reciprocating sliding against sapphire and steel hemispheres in dry (∼4% RH) and moist (35 to 52% RH…
Numerous derivatives of BODIPY (4,4-difluoro-4-borata-3a-azonia-4a-aza-s-indacene) are frequently used as fluorescent probes in modern protein and lipid research. Present studies of purpose-synthesised molecules show that the BODIPY chromophore can form two different ground state dimers, denoted DI and DII. In practis…
Abstract I. Introduction 108 II. Structural Analysis 109 III. Copolymer Composition 111 A. Composition by the Direct Method 111 B. Composition by the Method Based on Statistics 111 C. Copolymer Composition by the Hard‐Ionization Method 113 IV. Copolymer Sequence 114 V. Molar Mass Determination 115 VI. MS as a Detector…
The chemical diffusion coefficient and oxygen-transfer coefficients of selected compositions in the series La<sub>1-x</sub>Sr<sub>x</sub>CoO<sub>3-δ</sub> were studied using the conductivity relaxation technique. Measurements were performed in the temperature range 600-850°C and oxygen partial pressure 10<sup>-4</sup>…
Three denitrifying strains of bacteria capable of degrading poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were isolated from activated sludge and characterized. All of the isolates had almost identical phenotypic characteristics. They were motile gram-negative rods with single p…
The results obtained in experiments on the growth of zinc oxide, ZnO, under hydrothermal conditions are generalized. The polar growth and nonstoichiometry of ZnO crystals are analyzed in terms of crystal chemistry with due regard for the physicochemical conditions of the growth medium. The effect of the Li+ and of di-…
Abstract Epoxidized oils, epoxidized triacylglycerols, and epoxidized fatty acid methyl esters were made by reaction with performic acid formed in situ . The extent of epoxidation was ca. 95% for all of the epoxidized samples, as determined by 1 H nuclear magnetic resonance. The epoxidized samples were reacted with an…