Materials Literature
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Niobium oxide thin films have been successfully fabricated on the indium‐tin oxide coated glasses by pulsed laser deposition in an O 3 / O 2 gas mixture. Films are characterized by X‐ray diffraction and Raman spectrometry. Electrochemical and electrochromic properties of Nb 2 O 5 films are examined by cyclic voltammog…
The acylneuraminate pyruvate-lyase gene from Clostridium perfringens was sequenced and found to be most similar to the lyase gene from Haemophilus influenzae. Both the recombinant clostridial enzyme and the native enzyme from pig kidney were purified in larger amounts and characterized. The properties of the porcine l…
Abstract Polymers are already being used as implant materials in several biomedical applications by today. The present paper shows actual concepts for innovative degradable biomaterials as well as established polymers. Basic terms will be explained. Methods for biocompatibility testing of polymers will be introduced.…
Wrinkling is one of the most important fabric performance properties, which are routinely evaluated in reference to a set of visual standards in the textile industry. The visual evaluation is unreliable and time-inefficient. An industrial need for objective and automatic evaluation methods has been increasing markedly…
Hydrolytic reactions of metal alkoxides offer a broad range of possibilities for their use in the preparation of ceramic powders. This paper reports a unique and novel process to prepare fine powders of BaTiO 3 and SrTiO 3 from stable precursor solutions by carefully controlling the pH and temperature. This simple rou…
The initial stage of hydrogen–metal reactions leading to the formation of metallic hydrides, frequently proceeds (on massive metallic samples) by the appearance of hydride “spots” (or “patches”) on the surface of the metal. These spots (henceforth denoted as growth centers, GC’s) grow at a certain velocity, overlap, a…
Two different types of structure called X1 and X2 are existing in Y2SiO5 at normal conditions. In X1 type, Y3+ ions occupy two sites where they are surrounded respectively by nine and seven oxygen ions, while in X2 structure, only six and seven oxygen ions are involved. Nanometric scale X1-Y2SiO5 crystals were prepare…
The aim was to define the morphology and roughness of dentin from different tooth areas after various pretreatments to identify the effect of hybrid layer, resin tags, and mineralised dentin surface on shear bond strength. Thirty-eight extracted molars were used, each providing two sections of cervical (c) and lateral…
The synthesis of a pure phase of very long and hollow WS2 nanotubes from short but asymmetric oxide nanoparticles is described. In this process, the oxide nanoparticles grow along their longest axis; and subsequently their outermost layer is being sulfidized, while the growing oxide tip remains uncoated as long as the…
SUMMARY Subjective and objective methods were compared for the assessment of the quality of unretted and retted straw, and the fibres obtained after dew‐retting of four flax cultivars, Ariane, Evelin, Laura and Viola. Maturity of straw, degree of retting, ease of decortication after retting, divisibility, handle, clea…
Cells from the prostate tumor cell line LNCaP have been grown as spheroids. The growth kinetics of the spheroids have been characterized by fitting a Gompertz equation to spheroid growth curves. The proliferation state of cells within spheroids of different diameters was assessed by bromodeoxyuridine staining. Scannin…
Abstract The crystal chemistry characteristics of a hydroxyl-fluor apatite from a recently discovered kalsilite-bearing leucitite from Abruzzi, Italy, were investigated by electron microprobe, single crystal X-ray diffraction, IR, Raman and micro-Raman spectroscopy. The apatite has exceptionally high S and relatively…
Hybrid metal nickel/cobalt hexacyanoferrate (Ni/CoHCNFe) has been prepared in the form of thin films on electrode surfaces and as bulk precipitates (powders). This heteronuclear metal hexacyanoferrate cannot be considered a simple mixture of hexacyanoferrates of nickel and cobalt, and it shows different voltammetric a…
A mail survey was conducted to assess the types of household footwear currently being worn by a random sample of independently living men and women aged 65 years and older as well as their needs related to the purchase and wearing of household footwear. Questionnaires were completed by 128 people. The greatest number…
Using a scanning electron microscope, pleomorphism (notably filamentation) was seen when Escherichia coli was grown under starvation conditions for 14 d on microporous silicon wafers, titanium, glass and plastic discs. Under these conditions, the 'standard', rod shaped cell (1-3 microns) failed to separate after divis…
We report the calculation of the second-harmonic-generation (SHG) coefficients of ${\mathrm{LiB}}_{3}{\mathrm{O}}_{5}$ (LBO), ${\mathrm{CsB}}_{3}{\mathrm{O}}_{5}$ (CBO), and ${\mathrm{BaB}}_{2}{\mathrm{O}}_{4}$ (BBO) using the linearized augmented plane-wave band method in the local-density approximation with a scisso…
Abstract Chitosan has been used to form miscible, biodegradable blends with hydrophilic synthetic polymers as PVA and PEO. Characterisation of the blends by DSC, IR and microscopy analysis was made giving much attention to possible interactions of molecular polar group in the polymer chains. PVA/chitosan are found to…
Powder samples of were prepared at 1000°C by the combustion method. The emission spectrum of showed two kinds of emissions, which could be assigned to ions in the Sr site and the Y site. Reducing brought a broad band emission around 470 nm, which could be attributed to crystal defects introduced by the reduction. The…
The biodegradable polymer poly(D,L-lactide-co-glycolide) was synthesized by a ring-opening precipitation polymerization in supercritical CO2 using stannous octoate as initiator. Following polymerization, unreacted monomer was removed by supercritical fluid extraction and the polymer was recovered as a porous solid upo…
Kinetics of various α/β-Si3N4→α′/β′-SiAlON transformations were investigated for SiAlON ceramics with additions of rare-earth cations. It was determined that α-Si3N4 starting powders lead to faster Si3N4→α′/β′-SiAlON transformations than β-Si3N4 powders. In reactions with a two-phase α′/β′-SiAlON product, the formatio…