Materials Literature
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The following dinuclear exchange-coupled manganese complexes are investigated: [dtneMn III Mn IV (μ-O) 2 μ-OAc](BPh 4 ) 2 (dtne = 1,2-bis(1,4,7-triazacyclonon-1-yl)ethane), [(CH 3 ) 4 dtneMn III Mn IV (μ-O) 2 μ-OAc](BPh 4 ) 2 ((CH 3 ) 4 dtne = 1,2-bis(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)ethane), [(CH 3 ) 4 dtneMn I…
Light-scattering spectra of the glasses polystyrene (PS), polycarbonate (PC), and ${\mathrm{Ca}}_{0.4}{\mathrm{K}}_{0.6}({\mathrm{NO}}_{3}{)}_{1.4}$ (CKN) are measured in the frequency interval $3\ensuremath{-}10000 \mathrm{GHz}$ covering a broad temperature range. The low frequency wing of the fast relaxation spectru…
Abstract Biodegradable polymers constitute a loosely defined family of polymers that are designed to degrade through the action of living organisms. They offer a possible alternative to traditional nonbiodegradable polymers if recycling is impractical or not economical. The main driving force behind this technology is…
The soil-dwelling microbe, Pseudomonas sp. strain CBS-3, has attracted recent attention due to its ability to survive on 4-chlorobenzoate as its sole carbon source. The biochemical pathway by which this organism converts 4-chlorobenzoate to 4-hydroxybenzoate consists of three enzymes: 4-chlorobenzoyl-CoA ligase, 4-chl…
Most apparel sizing systems are based on one or two body dimensions and rely on assumptions about proportional body relationships to project other dimensions necessary to design the garment pattern. Garments from these systems will not fit a population with large variations in body proportions. Using nonlinear optimiz…
A series of metal bis-mnt complexes (mnt = 1,2-dithiolatomaleonitrile) with the trimethylammonium methylferrocene cation have been synthesized and characterized using X-ray diffraction, magnetic susceptibility, and differential scanning calorimetry measurements. The complexes have the formulas (FcCH(2)NMe(3))[Ni(mnt)(…
We consider a fluid of hard boomerangs, each composed of two hard spherocylinders joined at their ends at an angle ψ. The resulting particle is nonconvex and biaxial. The occurence of nematic order in such a system has been investigated using Straley's theory, which is a simplificaton of Onsager's second-virial treatm…
Magnetite single crystals ${\mathrm{Fe}}_{3\ensuremath{-}x}{M}_{x}{\mathrm{O}}_{4}$ doped with $M=\mathrm{Ni},$ Co, Mg, Al, Ga, and Ti were grown and annealed under a controlled atmosphere to produce homogeneous and oxygen stoichiometric samples. The cation vacancy concentration of the samples was proved to be lower t…
The structures of the acid-paste-prepared α-form of cobalt phthalocyanine (α-PcCo) and of its corresponding β-form (β-PcCo) have been refined through X-ray powder diffraction using the Rietveld method. The α-polymorph is triclinic, space group P 1̄, cell parameters a = 12.090(8) Å, b = 3.754(2) Å, c = 12.800(9) Å, α =…
Mitochondrial complexes I, II, and III were studied in isolated brain mitochondrial preparations with the goal of determining their relative abilities to reduce O2 to hydrogen peroxide (H2O2) or to reduce the alternative electron acceptors nitroblue tetrazolium (NBT) and diphenyliodonium (DPI). Complex I and II stimul…
The atomic structure of lead zirconate, PbZrO 3 (PZ), was studied using Rietveld refinement and atomic pair distribution function analysis of pulsed neutron powder diffraction data for the antiferroelectric, intermediate and paraelectric phases. The symmetry of PZ at T = 20 K in the antiferroelectric phase was determi…
Abstract The effects of the filler content and size on the mechanical properties such as tensile modulus, E c , yield strength, σ yc , and impact strength, S IC , of glass bead–filled polypropylene (PP) composites have been investigated employing an Instron materials tester and a Ceast impact tester at room temperatur…
During the last decade, aromatic cyanate esters (CE) have become established as a new and unique class of high-performance thermosetting resins for use as prepreg matrices in both the electronic and aerospace industries. The basic properties of CE resins, such as low moisture absorption, excellent electrical propertie…
X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) are used to characterize the interface between poly(acrylic acid) (PAA) and an aluminium oxyhydroxide (AlOOH) surface. Reaction of the PAA carboxylic acid functionality with hydroxyl groups at the surface of the oxide to form a m…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe First Dinuclear Complex of Palladium(III)F. Albert Cotton, Jiande Gu, Carlos A. Murillo, and Daren J. TimmonsView Author Information Laboratory for Molecular Structure and Bonding and Department of Chemistry, Texas A&M University College Station, Texas 77843-3255 D…
Spray pyrolysis of aqueous solutions that include copper(II) acetate, glucose, and 2‐propanol was studied for the formation of cuprous oxide (Cu 2 O) thin films on glass substrates. The deposition conditions, based on the phase relations of the films, were investigated in terms of solution concentration and substrate…
This work reviews the publications concerning the use of polymerizable surfactants (surfmers) in heterophase polymeriza-tion in terms of the mechanisms relevant to the process. The goal was to gain some insight into these mechanisms and to help the reader on the way in trying to find a suitable surfmer and to apply it…
Polyhydroxyalkanoates (PHAs) are microbial polyesters that can be used as completely biodegradable polymers, but the high production cost prevents their use in a wide range of applications. Recombinant Escherichia coli strains harboring the Ralstonia eutropha PHA biosynthesis genes have been reported to have several a…
The design and synthesis of new linear-dendritic diblock copolymers with a linear PEO block and a dendrimeric PAMAM block are described. Two series with PEO molecular weights of 2000 and 5000 were synthesized. DSC results on the effect of diblock composition on the microphase segregation behavior of the diblocks are r…
Organic vapor phase deposition (OVPD) opens new opportunities in the control of composition and structure of organic thin films. The use of this recently developed process is examined for the growth of four archetypal organic systems: a crystalline organic salt (the optically nonlinear charge transfer salt DAST, see F…