Materials Literature
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Abstract Stainless steel (SS) 304L is widely used as a construction material in industries requiring corrosion resistance in nitric acid environments. Representative samples from 20 heats of SS 304L products were subjected to a testing procedure consisting of testing as per the rapid screening test (Practice A) and th…
Abstract A number of novel nonlinear optically (NLO) active polymethacrylates were prepared from the NLO active methacrylates 2a–d with azobenzene side groups and the bulky comonomer 1‐adamantyl methacrylate. The polymers exhibit unusually high glass transition temperatures between 160°C and 190°C. The copolymerizatio…
The diameter-distribution of collagen fibrils in the dermis of human skin and scar tissue has been investigated. In samples of normal skin, normal scar, and hypertrophic scar, prepared for transmission electron microscopy, collagen fibrils were systematically random-sampled and their diameters measured. There was a st…
Cu–Mg–Al hydroxycarbonate, derived from Cu–Mg–Al hydrotalcite, affords yields of >80% for the heterogeneous coupling of phenylethyne to 1,4-diphenylbuta-1,3-diyne in the presence of sodium hydroxide and oxygen.
The distributions of the tangential and radial stresses acting on the yam of a fabric during sewing as the sewing needle is inserted into the fabric have been discussed by means of the mechanical principles of elasticity. The influence on the needle penetration force caused by the shape of the cross section and the pr…
The effects of heat treatment on PVA films containing water soluble plasticizers were investigated. Propylene glycol, glycerol and polyethylene glycol were used as plasticizers. There was synergism between heat treatment and the presence of plasticizers in enhancing the water resistance of PVA films. In the absence of…
Soft magnetic composite (SMC) materials offer design advantages when compared with steel laminations due to their isotropic nature and the relative ease of producing complex net shaped components by the powder metallurgy production route. Iron loss is low at elevated frequencies as the eddy current loss is a small por…
The thermal decomposition of ammonium metavanadate, NH4VO3, has been studied by differential scanning calorimetry (DSC), mass spectrometry (MS) and X-ray diffraction (XRD) in the temperature range 50–500 °C. Different experimental conditions (heating rate and atmosphere) have been explored in various combinations. Dif…
Lattice chains, chain length 200 monomers, generated by the Monte Carlo method, have been studied on a tetrahedral lattice. Real-chain features such as conformational restrictions, variable segment interaction and chain thickness were assumed in the model. The chain vector density distribution function W(R) and the re…
Oxotitanium and oxovanadium β-alkylcorrolates have been synthesized by reaction of corroles H3L with different metal carriers. These complexes retain an aromatic π-electron system and exist as mononuclear species [MO(HL)] containing a MO double bond. Optical and NMR spectroscopy indicated reaction with base leading to…
The unique memory property of thermodynamic wire is only partially understood. It is believed to result from the wire's inherent capability to markedly alter its atomic bonding forces as a function of temperature. This shape recovery phenomenon may be the result of a transition in crystal structure that occurs by defo…
The morphotropic phase boundary (MPB) in PbZr x Ti1-x O3 (PZT) powders prepared by a novel semi-wet route is shown to be around x = 0.525. XRD evidence is presented for the first time to demonstrate the coexistence of the tetragonal (T) and rhombohedral (R) phases in such powders over a very narrow composition range o…
Examples of mesogenic 1,4,8,11,15,18,22,25-octaalkylphthalocyanines and their zinc analogues, series 1, have been deposited as spin-coated films onto glass slides. Thermally induced molecular reorganisations within the films have been investigated by optical spectroscopy. Temperatures of transitions observed in the fi…
Poly morphs are attracting a great deal of attention in present-day pharmaceutical literature. Most often the polymorphic forms are distinguished by way of solubility (or dissolution rates), DSC and X-ray diffraction. The writing to follow deals with a polymorphic pair which is virtually indistinguishable except by me…
The interaction between partial discharge (PD) phenomena occurring in insulating systems is investigated in this paper. In particular, the recognition of two PD phenomena simultaneously active is approached by means of a five-parameter additive Weibull distribution. Various shapes of the PD height distribution, obtain…
Article Planktonic Diatoms from the Gulf of California and Coasts off Baja California: Species of the Genus Thalassiosira was published on January 1, 1995 in the journal Botanica Marina (volume 38, issue 1-6).
The first optical resolution of a photochromic fulgide is performed for a thermally irreversible indolylfulgide to give a pair of enantiomers of helical chirality, and their optical properties and photochemical and thermal enantiotopomerization processes are investigated.
The effect of titanium dioxide and polydextrose on film adhesion to microcrystalline cellulose tablet surface and mechanical properties of aqueous-based hydroxypropyl methylcellulose free films were evaluated using a Lloyd LRX materials testing machine. The free films and the films applied to tablets were prepared by…
A series of Na2MoO4/SiO2 catalysts with various loadings of Na2MoO4 have been characterized using secondary ion mass spectrometry (SIMS), X-ray photoelectron spectroscopy (XPS), FTIR and X-ray diffraction (XRD). Their catalytic activity for methane oxidative coupling (MOC) has been tested. The results revealed some ty…
The behavior of large induction motors during transient as well as steady state running conditions is of significant interest to the power industry. A variety of analytical predictive tools are employed to aid the design and predict their operation under transient and steady state conditions. This paper presents a str…