Materials Literature
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Abstract The cationic polymerization of cardanol using borontrifluoridediethyletherate as initiator has been investigated by gel permeation chromatographic techniques. The molecular weight and molecular weight distribution of the polymer at different temperatures and various initiator concentrations were studied, and…
CuI is known to undergo two phase transitions at T 1 = 367°C and T 2 = 407°C. The structural changes involve a rearrangement of the anions and disordered distributions of the cations. The low temperature γ -phase has zincblende structure, space group F [unk]3 m [ a = 6.0337(3) Å, Z = 4]. The intermediate β -phase belo…
It has been shown that increasing bacterial iron concentration enhances killing by hydrogen peroxide (H2O2) but not by polymorphonuclear granulocytes (PMN). It is possible that owing to the multiple bactericidal mechanisms of the PMN, differences in the killing rate of iron-loaded bacteria and control bacteria are obs…
Description STP 1030 provides the insulation community with an update on residential, commercial, and industrial application. Includes 50 papers on new materials assessments and properties of foams, properties and models, loose-fill behavior, systems performance testing, building applications and user interests, and i…
Abstract Treatment of cotton cellulose with 3 M sodium hydroxide solution at 260°C and 280°C gave a mixture of carboxylic acids with a yield of > 95%. The identified 50 carboxylic acids included both hydroxy monocarboxylic acids and dicarboxylic acids; their routes of formation are discussed. Among the main compoun…
Polystrene modification of chemical resistance modification of impact properties - of average density and thermoinsulating properties - of durability - of flammability - of electrical conductivity - of rheological properties - of strength characteristics - of heat resistance.
The Plasticity of single crystals of MgSiO 3 perovskite was studied (at room temperature) by the microhardness tests using a Vickers and a Knoop indenter. The Vickers hardness, H v , of MgSiO 3 perovskite was determined to be 18 +/− 2 GPa, about a factor of two larger than the hardness of either enstatite or olivine,…
Vacuum UV circular dichroism spectra measured down to 178 nm for hexameric 2-zinc human insulin, zinc-free human insulin, and the two engineered and biologically active monomeric mutants, [B/S9D] and [B/S9D,T27E] human insulin, show significant differences. The secondary structure analysis of the 2-zinc human insulin…
Crystal structures of di- and tri-nuclear palladium(II) complexes with the azamacrocycles[18]aneN6 and [21]aneN7 have been solved by X-ray analysis; in the case of the trinuclear complex deprotonation of a secondary amino group occurs, both in solution and in the solid state.
Abstract Magnesium and magnesium alloys are used in a wide variety of structural and nonstructural applications. This article provides information on selection and application of magnesium and magnesium alloys, mainly, casting alloys and wrought alloys. It also provides tabulated data for the composition, properties o…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Abstract When starch was treated with KMnO 4 solution, MnO 2 was deposited overall the starch. The amount of MnO 2 deposited relied on the KMnO 4 concentration. Subjecting the MnO 2 ‐containing starch to a solution consisting of monomer (methacrylic acid, MAA) and acid (citric, tartaric, oxalic or sulphuric acid) resu…
The preparation of racemic and optically active glyceric acid de rivatives as suitable precursors for the formulation of a new class of bioerodible and/or biodegradable polymers is described. Details are provided for the prepa ration of chiral 3-0-alkyl substituted methyl glycerates and on their potential to form the…
Abstract Thermogravimetric analysis (TGA), in which the mass of a sample is monitored as a function of temperature, is one of the oldest analytical techniques used in clay mineralogy. One of the first applications to the study of minerals was reported in 1903 by Nernst and Riesenfeld. Since then, TGA has been used to…
Infrared spectra of NO, NO2 and CO adsorbed on Rh/Al2O3 have been recorded in order to identify the role of surface Rh—NO+ species in the reactions of NO and CO on Rh surfaces. Rh—NO+ was generated by thermally activated adsorption of NO, adsorption of NO on oxidised Rh or by adsorption of NO2. The latter also gave ad…
A series of novel binuclear cobalt(II) complexes containing the µ-hydroxo-bis(µ-carboxylato)-dicobalt(II) core have been prepared where each cobalt(II) centre is capped by the tridentate macrocycle N,N′,N″-trimethyl-1,4,7-triazacyclononane (L, C9H21N3): [CoII2(µ-RCO2)2L2(µ-OH)]PF6[R = Me (1); ClH2C (2), or Cl2HC (3)].…
In this paper, we study a tight-binding Hamiltonian for codimension one quasicrystals by means of a new numbering which orders the sites according to their environment. This includes the general 1D quasiperiodic chain. We exhibit exact extended wave functions on approximants for the general quasiperiodic chain, for wh…
A study has been made of the effect of hydrogen on the shape memory effect and transformation behavior of Ti-Ni alloy. The material was evaluated in the temperature range from 300 to 473 K using a bent specimen. The transformation behavior was analyzed by differential scanning calorimetry (DSC) and X-ray diffraction t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTESR, XRD, and DRS studies of paramagnetic titanium(3+) ions in a colloidal solid of titanium oxide prepared by the hydrolysis of titanium trichlorideAkira Ookubo, Eiji Kanezaki, and Kenta OoiCite this: Langmuir 1990, 6, 1, 206–209Publication Date (Print):January 1, 1990Publi…
The mechanisms of hydrogen-induced losses in silica-based fibers due to reaction are analyzed, and novel experimental results are presented. The mechanisms of hydrogen reaction with a glass structure were studied and found to be divided into two groups. One was responsible for the reaction with glass networks, not def…