Materials Literature
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Fourier-transform infrared photoacoustic spectroscopy (FTIR-PAS) is shown to be a useful tool for structural studies of hydrogen and/or oxygen chemisorption on the surface of diamond powders. As compared with the diffuse reflectance method or the KBr pellet method, it has become clear that PAS has an advantage in term…
The effects of plasticizers, triacetin and three different molecular weights of polyethylene glycol, on the water permeation and mechanical properties of cellulose acetate were investigated. At 37°C, the water permeability of cellulose acetate was found to decrease with increasing plasticizer to a minimum and then to…
Hydrogen-bonded dimers of 4-alkoxy-4′-stilbazole homologues (C n OSB, proton acceptors) and the mono-(2-methylbutyl)ester of terephthalic acid (MBTA, proton donor) behaved like conventional thermotropic mesogens. For chiral MBTA mixtures, chiral nematic and blue phases were observed with n = 1 and 2, and chiral smecti…
A remote plasma reactor, with air as the plasma gas, has been used for in-line surface modification of linear low-density polyethylene tape (LLDPE) passing 10 cm below the main plasma zone. Line speeds of up to 0.70 m/s were tested, allowing the study of 0.014 s exposure times to the plasma. Oxygen to carbon (O/C) rat…
Many different failure criteria have been suggested for mixed-mode delamination toughness, but few sets of mixed-mode data exist that are consistent over the full range of Mode I opening load to Mode II shear load range. The mixed-mode bending (MMB) test was used to measure the delamination toughness of a brittle epox…
The synthesis and non-linear optical properties of a series of Icosahedral carboranes are described. The carboranes are substituted on both carbon atoms, with a series of electron-donating and electron-withdrawing substituents. The single-crystal X-ray structure of two of the series 1,2-bis(3-nitrophenyl)-1,2-dicarba-…
Two different methods for classifying partial discharge (PD) phenomena by a personal-computer-aided system are described. The first is concerned with common minimum distance classification, using statistical data on pulse quantities such as apparent charge, energy and phase. Applying the correct algorithms and feature…
Setting up an electron microscopy facility biomedical specimens materials specimens basic materials specimen preparation techniques for TEM specialized specimen-dependent preparation techniques for TEM immunocytochemical techniques for TEM and SEM general techniques for TEM observation general preparation techniques f…
Lamprin, an insoluble non-collagen, non-elastin protein, is the major connective tissue component of the fibrillar extracellular matrix of lamprey annular cartilage. Here we demonstrate that the soluble monomer of lamprin is a family of highly hydrophobic, self-aggregating proteins with molecular masses of 12 and 10 k…
Special production techniques enable the preparation of highly dispersed MgO with a specific surface area up to 400 m2 g–1. This results in a significant accumulation of highly reactive, low-coordinated surface centres which are related to two fundamentally different processes of H2 chemisorption on neat MgO: the homo…
The formation of colloidal gold particles of diameter less than 10 nm has been achieved by the irradiation of aqueous HAuCl4 solutions with 20 kHz ultrasound; the particle size and efficiency of particle formation is highly dependent on the presence of alcohol, its type and concentration, in the solutions.
Tetrafluoroethylene (TFE) glow discharge-treated Dacron vascular grafts resist thrombus deposition, embolization and thrombotic occlusion. In addition, albumin adsorbed on TFE-treated surfaces resists elution by sodium dodecyl sulfate (SDS). Since the tight binding of albumin to TFE-treated surfaces may contribute to…
Abstract Measurements of the electron range R, and the backscattering coefficient η and the secondary electron yield δ at normal and tilted incidence for different elements show characteristic differences for electron energies in the range of 0.5 to 5 keV, compared with energies larger than 5 keV. The backscattering c…
By marrying warhead fundamentals with more modern design approaches, this book will assist new members of the warhead community to learn more rapidly, as well as provide a reference text for those working actively in the field. The book's chapters are each self-contained articles; however, the topics are linked and ma…
The sponge-, cotton-, and flake-type remedies made of chitin (chitin-sponge, chitin-cotton, and chitin-flake, respectively), and non-woven fabric of polyester (NWF) composited with chitin (chitin-NWF) were applied to various types of trauma, abscess, surgical tissue defect and herniorrhaphy in 147 clinical cases inclu…
The influence of impurities on the luminescence quantum efficiency of and has been studied. The transition metal ions Fe and Mn are not built into the lattice under a reducing firing atmosphere. Tetravalent Ce 4+ is probably present in a second phase. Codoping with cations with different valencies has no influence on…
DSC and X-ray studies on a series of 1,2-phenylene bis[4-(4-alkoxyphenyliminomethyl)benzoates] are presented. The phases were shown to be classical nematic and/or smectic by their continuous miscibilities with reference mesophases. The layer spacings in the smectic A phase measured as a function of the alkyl chain len…
Titanium alloys for medical implants were cast using 5∼20 mass%Zr, 10∼20%Sn, 4∼8%Nb, 2∼4%Ta and 0∼0.2%Pd as alloying elements instead of using harmful Al and V.The alloys were forged in their α and α+β regions and then annealed at 973 K for 7.2 ks. The annealed microstructures of the alloys consisted mainly of the aci…
The monoesters of mono-(1a), di-(1b), tri-(1c) and tetra-(ld) ethylene glycol with 3,4,5-tris[p-(n-dodecan-1-yloxy)benzyloxy]benzole acid (1), the polymethacrylates derived from them (2) and the complexes of both 1 and 2 with LiCF3SO3 and NaCF3SO3 self-assemble into cylindrical supra-molecular architectures which exhi…
A critical evaluation of empirical and mechanistically based modelling of pit propagation kinetics has been made. Empirical models of pit growth kinetics based on the application of Faraday s law to measurement of the total current flowing to potentiostatically controlled specimens have the limitation that only averag…