Materials Literature
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The petalite-subtype Tanco granitic pegmatite, southeastern Manitoba, intrudes an amphibolite (metagabbro), which is metasomatically altered to tourmaline and magnesian annite close to the contact. The composition of exocontact tourmaline depends on the composition of the host rock and on the composition and amount of…
The results of a metallographic study of gray cast-iron water pipes are reported. These pipes were installed between 1885 and 1973 in eight different water systems. Each pipe had been extracted during scheduled maintenance or failure repairs to provide data for a larger study to produce a methodology for determining t…
The paper reports on a study of the effect of annealing in hydrogen on the structural phase transition in clusters of ultradisperse diamond (UDD) obtained by the detonation method. The samples studied were of two types, namely, prepared by the “dry” and “wet” techniques, which differ in the cooling rate of the detonat…
This paper provides a review of synthesis of the phthalocyanines containing various macrocycles at the peripheral position of the benzene rings. They are expected to be suitable to change the chemical and physical properties toward the need of technologycal applications. In addition, transition and alkali metal phthal…
Fluorescence spectroscopy, surface-enhanced Raman spectroscopy (SERS), and analytical centrifugation are applied in this work to study the interaction of the antitumor drug 9-aminoacridine (9AA) with a trypsin-like protease, guanidinobenzoatase (GB), extracted from an Erlich tumor. As a consequence of this interaction…
The kinetics of formation of α,α-dicyano- p -toluoylcyanide anion (DCTC - ) by reaction of TCNQ 0 and its radical anion salts with nitrite ion have been investigated spectroscopically; the reaction of TCNQ 0 with excess nitrite is first order, whereas oxidation of TCNQ • - appears to proceed via TCNQ 0 as an intermedi…
Solid state polymerization has the potential to afford topochemical control over reaction pathways. High-pressure solid state polymerization at low temperature may permit a single lowest energy reaction pathway to be favored and also allow reactants to approach more closely before reaction begins, both factors that ma…
Aiming to clarify spinodal decomposition of polymers in the induction period of crystallization, time-resolved small-angle x-ray scattering measurements have been made in situ for poly(ethylene naphthalate) while it was crystallized from the glass, or in the case of the so-called glass crystallization. It is confirmed…
The structures of the oxysubstituted triphenylene premesogens, 2,3,6,7,10,11-hexahydroxytriphenylene ( 4 ), 2,3,6,7,10,11-hexamethoxytriphenylene ( 5 ), 2,3,6,7,10,11-hexaethoxytriphenylene ( 6 ), and 2,3,6,7,10,11-hexapropoxytriphenylene ( 7 ) were determined, and the structural results were investigated in the aim t…
Spatial distributions of plasma temperature and densities of carbon species in DC arc discharge for generating carbon nanotubes have been investigated by measuring the spatial distributions of optical emission spectra as a function of pressure, current density for arc discharge, and cooling rate of the cathode. It is…
Quality data collection for macromolecular cryocrystallography requires suppressing the formation of crystalline or microcrystalline ice that may result from flash-freezing crystals. Described here is the use of lithium formate, lithium chloride and other highly soluble salts for forming ice-ring-free aqueous glasses…
Metal-free phthalocyanines and nickel phthalocyanines carrying four or eight oligo(ethyleneoxy)thia groups on peripheral positions have been synthesized from new phthalonitrile derivatives. These phthalocyanine derivatives were characterized both thermotropic and lyotropic mesophases by DSC and X-ray.
Abstract Al2O3 gel films were prepared on poly(ethylene terephthalate) substrates from Al(O–sec-C4H9)3 chemically modified with ethyl acetoacetate. A small roughness of about 20–50 nm was found to form on the Al2O3 gel films dried at room temperature and then immersed in hot water at 60 °C. When hydrolyzed fluoroalkyl…
Blends of polyamide-6 PA6 as matrix and a hyperbranched poly(ether amide) P1, based on 2-(3,5-dihydroxyphenyl)-1,3-oxazoline, were prepared. The content of the hyperbranched polymer was varied between 0.1 and 10 wt.-%. The blends were prepared in order to investigate the influence of the hyperbranched material on the…
Diffuse scattering is usually associated with some disorder in the analyzed material. Different kinds of disorder may produce different diffuse scattering - or not. In this letter, we demonstrate some aspects of the variety of diffuse scattering that occurs even in very simple examples, and how unawareness may lead as…
We report a Raman scattering study of ${\mathrm{PbTiO}}_{3}$ (PT) nanocrystals prepared by a sol-gel method at a low temperature of $400\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}.$ The Raman spectra indicated the existence of a stable ferroelectric phase in the PT nanocrystals at room temperature. The temperature d…
Phase diagrams of unpolymerized and UV-polymerized 2-ethyl hexyl acrylate (EHA) mixtures with the liquid crystal E7 are established using optical microscopy and differential scanning calorimetry. Both diagrams show upper critical solution temperature behavior. From 50 to 90 wt % liquid crystal (LC), the (I+I) phase lo…
The synthesis of novel Schiff's bases incorporating the five-membered 1,3,4-thiadiazole (series 7, 9) and 1,3,4-oxadiazole (series 8, 10) rings have been prepared and their liquid crystalline properties studied. All compounds of series 7 exhibit an enantiotropic smectic C phase. No liquid crystalline properties were o…
We report a novel soluble n-doped polyaniline in dimethyl sulfoxide (DMSO), which is obtained by doping the emeraldine base type polyaniline with the strong reductant, KH or NaH. At room temperature, it shows a broad strong new optical absorption peak above 1100 nm, indicating the formation of a new energy band within…
Microcrystalline diamond films have been prepared in a 13.56 MHz low pressure inductively coupled plasma. The bonding in the films obtained were studied by Raman spectroscopy with 514, 325, and 244 nm excitation wavelengths. 514 nm excited Raman spectra exhibit peaks at ∼1355 and ∼1580 cm−1 corresponding to sp2 bondin…