Materials Literature
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The vibrational spectrum of tetraethylorthotitanate (TET) has been assigned by using vibrational and structural data from the series Ti(OEt)yCl4 − y (y = 1 to 4), to distinguish between bands due to bridging and terminally coordinated ethoxide. EXAFS studies of the series showed an increase in association with increas…
Instrumental manipulations during minimal access surgery (MAS) are limited by the four degrees of freedom (d.o.f.) possible when long instruments are introduced into the peritoneal cavity through access ports. This is in sharp contrast to an equivalent instrument held in the hand by the surgeon during open conventiona…
Phenolic resin/silica hybrid ceramers were prepared through sol–gel technology. Differential scanning calorimetry and thermogravimetric analysis methods were utilized to study the thermal properties of the fabricated hybrid ceramers. The results showed that the heat resistance of the ceramers was slightly higher than…
A technique has been established to grow large diamonds up to 2 cm. The crystals are bulky polyhedron with yellow, blue, green or brown color as well as colorless, which depend on impurities. The impurities incorporated into the diamond are limited, i.e. nitrogen, boron, nickel, cobalt, silicon and phosphorus.
Photolysis (254–350 nm) of a variety of aroyl-substituted phenylacetic acids and p-acetylphenylacetic acid in aqueous solution at pH > pKa resulted in efficient photodecarboxylation (Φ = 0.2–0.7), to give in most cases a single product arising via the corresponding arylmethyl carbanion, indicating that photodecarboxyl…
The combustion behaviour and thermal decomposition of ethylene–vinyl acetate copolymer (EVA) (26 wt% vinyl acetate content) formulations containing alumina trihydrate, ammonium polyphosphate, melamine, pentaerythritol and their co-mixtures, were studied using cone calorimetry and thermogravimetric analysis. Formulatio…
Dynamic viscoelastic properties of binary blends consisting of an isotactic polypropylene (i-PP) and ethylene-1-octene copolymer (PEE) were investigated to reveal the relation between miscibility in the molten state and the morphology in the solid state. In this study, PEE with 24 wt % of 1-octene was employed. The PE…
Microchannels having highly enhanced surface area have been fabricated by a thin‐film deposition technique known as glancing angle deposition. Porosimetry and simulation of the microstructures was used to estimate the surface area enhancement of the new microchannels. Two distinct types of microchannels have been crea…
The differences in the polymerization abilities of N-vinylformamide (NVF) and N-vinylisobutyramide (NVIBA) and the synthesis of their copolymers were studied. The polymerization abilities were fairly good and quite similar to those of N-vinyl- acetamide (NVA), a monomer in the same class as N-vinylalkylamides. Since t…
Previously reported fibre/intumescent composite textile systems are leading to the development of a range of high performance thermal barrier fabrics. These systems comprise nonwoven cores of flame retardant cellulose/regenerated cellulose throughout which fibre-interactive intumescent chemicals (melamine and phosphat…
The adsorption of a cationic azobenzene derivative into both siliceous and aluminium containing mesoporous silica films has been investigated; photoisomerization was found to occur in the temperature range 80–300 K and the mesoporous aluminium containing silica films were proved to be useful reaction media to immobili…
Results from fracture toughness and tensile and delayed hydride cracking (DHC) tests on Zr-2.5Nb pressure tubes removed from CANDU power reactors in the 1970s and 80s for surveillance showed considerable scatter. At that time, the cause of the scatter was unknown and prediction of fracture toughness to the end of the…
Thermal analytical studies of synthesized mixtures of powdered wool, wool/flame retardant viscose blended fibre/intumescent combinations and intumescent-coated fabrics have shown previously that while enhanced volatilization occurs during char formation below 400 °C, the chars formed show higher-than-expected oxidativ…
The synthesis of a novel bent-shaped, four-ring thiophene-based chiral liquid crystalline ester derived from 5-(4-n-decyloxyphenyl)thiophene-2-carboxylic acid and (S)-1-methylheptyl 4′-hydroxybiphenyl-4-carboxylate is reported, i.e., (S)-4′-(1-methylheptyloxycarbonyl)biphenyl-4-yl 5-(4-n-decyloxyphenyl)thiophene-2-car…
Electrochemical techniques, complemented by weight change and ex situ X‐ray spectroscopic measurements, were employed to characterize the corrosion of nickel in concentrated solutions. By use of a rotating cylinder electrode, it was found that corrosion is a mass‐transport controlled process with the convective diffus…
For a diruthenium complex, charge migration between different moieties of a bridging ligand with extended conjugation is directly monitored for the first time by using time-resolved emission and absorption spectroscopy.
The synthesis of a new ligand, H3BBAC (N,N-bis(2-hydroxybenzyl)aminoacetic acid) and its first VIVO2+ complex, [Et3NH]2[OV(BBAC)]2 (1), are presented in order to model the active site of vanadium transferrins. Spectroscopic (EPR, UV-VIS), magnetic properties and crystal data of 1 are discussed and a new magneto-struct…
Hydrogen doped zinc oxide (ZnO:H) films have been deposited by radio‐frequency reactive magnetron sputtering and then heat treated at fixed temperature. The roles of hydrogen on transparent conducting properties as well as on microstructural evolution have been investigated. It is identified from X‐ray diffraction pat…
The synthesis and polymerization of two new electroactive bisphenols derived from 3,4,9,10-perylenetetracarboxylic dianhydride and 1,4,5,8-naphthalenetetracarboxylic dianhydride with 2-(4-aminophenyl)-2-(4-hydroxyphenyl)propane, respectively, are described. Copolymerization using the two new bisphenols and 4,4′-isopro…
Silver colored ribbon-like crystals of K1 − xSn5 − xBi11 + xSe22 (x ≈ 0.33) were prepared by direct combination of K2Se, Bi2Se3, Sn and Se at 800 °C. A structure determination was carried out for K0.66Sn4.82Bi11.18Se22. Bi2Te3-type and NaCl-type building units are connected to form a new kind of three-dimensional anio…