Materials Literature
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Article Alkylpolyglucoside - physikochemische Eigenschaften und Anwendung / Alkylpolyglucosides, their Physico-chemical Properties and their Uses was published on December 1, 1991 in the journal Tenside Surfactants Detergents (volume 28, issue 6).
Ausgeprägte Lewis‐Acidität ist die Erklärung für die außergewöhnliche Aktivität der Titelverbindung in der katalytischen Olefin‐Epoxidierung mit Wasserstoffperoxid. Das System MTO/ t ‐C 4 H 9 OH/H 2 O 2 epoxidiert selektiv und effizient Olefine unter sehr schonenden Bedingungen (‐ 30 bis + 60°C, in der Regel Raumtempe…
We have found a decrease in the intensity of the 7.6-eV band and the appearance of the Si-H band upon heating ${\mathrm{SiO}}_{2}$ glasses, which were prepared by a method involving processes of dehydration with ${\mathrm{Cl}}_{2}$ gas, in ${\mathrm{H}}_{2}$ gas. The absorption cross section of the 7.6-eV band evaluat…
A novel serine/threonine protein kinase (termed rac-PK) has recently been identified and cloned from cDNA libraries derived from the human cell lines MCF-7 and WI38. A second form of this protein kinase, termed rac protein kinase beta, has been identified from cDNAs derived from the same cell lines. These two closely…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure of chromyl nitrate (CrO2(NO3)2) in the gas phase: a novel form of coordination for chromium?Colin J. Marsden, Kenneth Hedberg, M. M. Ludwig, and Gary L. GardCite this: Inorg. Chem. 1991, 30, 25, 4761–4766Publication Date (Print):December 1, 1991Publicatio…
Infrarødspektra, vaterit, calcit, analysis
Experiments investigating thermocavitation in binary solutions induced by continuous laser radiation are described. The cavitation consists in periodic rise and collapse of vapor-gas bubbles, accompanied by hydraulic shocks. The necessary condition for obtaining periodic pressure pulses by thermocavitation are investi…
Two mesongenic homologous series containing azo group are synthesized. The esters of Series II, III and IV exhibit only the smectic phase. The smectic phase exhibits focal conic or fan-shaped textures. Members of Series I exhibit nematic phases, whereas the members of Series II and IV exhibit enantiotropic smectic pha…
The corrosion rate and changes in the microstructure and fracture strength of alumina ceramics (93.0% Al 2 O 3 and 99.5% Al 2 O 3 ) were studied in 0.1 m to 25 m NaOH solutions at 150°C to 200°C, where m = mol/(kg of H 2 O). The attack of the caustic alkaline solution started at the grain boundaries. Consequently, the…
Data have been obtained for the rate of reaction of freshly generated iron surfaces at low potentials with aqueous solutions containing chloride ions. The presence of chloride ions accelerates the formation of the first monolayer of oxidized iron, but with no significant increase in the charge required to form it. The…
The fabric geometric models based on lamination analogy and stiffness averaging method are utilized to numerically characterize a 2-step braided composite. The model predictions were found to be in good agreement with results of mechanical tests performed in this study. The architecture of this material is investigate…
Individual bundles of ceramic fibers were infiltrated with SiC to study the reaction and diffusion kinetics during isothermal chemical vapor infiltration (CVI). More uniform infiltration was observed in samples where baffles were placed in the reactor and when HCl was added to the inlet gases. The evolution of the mic…
Abstract The crystal structure of fedotovite, K 2 Cu 3 O(SO 4 ) 3 has been determined, space group C 2/ c , a 19.037(6), b 9.479(2), c 14.231(5) Å, β 111.04(3)°, Z = 8, D x = 3.09 g/cm 3 . The main units of the fedotovite structure are formed around two additional oxygen atoms and consist of edge-sharing [OCu 4 ] tetr…
Using a viscometric assay and various electron microscopic procedures (negative staining, rotary shadowing, ultrathin sectioning) we have determined the influences of different kinds of ions and of ionic strength on the structures formed by assembly of soluble subunits of vimentin from bovine lens tissue or from Esche…
Two extreme textural types of cultivated surface soils are mainly considered here, non-shrinking red-brown earths and highly shrinking cracking clays. Total porosity is used to assess the structural status of the former. Values are compared with the highest and lowest values found in the field. For the latter, the cri…
The nematic-isotropic transition temperatures for aromatic calamitic compounds with terminal alkyl chains attached via a methylene group are usually found to be lower than those with an ether link. This difference is generally attributed to the higher anisotropy of the molecular polarizability expected for an ether li…
A disclination line or a shifting effect of the lens center had been observed in a homogeneously aligned or a hybrid-aligned liquid crystal microlens with an asymmetric electrode structure of a hole-patterned electrode and a plane electrode. These deteriorating factors of lens properties can be eliminated by a homogen…
Clay particle interaction as mediated by water is considered within the context of attractive and repulsive inter-particle forces-van der Waals forces, ion correlation forces responsible for the potential minimum between Ca-clay particles, cation hydration, ion induced structural forces and diffuse double layer forces…
The problem of obtaining asymptotic expressions describing the shape of small sessile and pendant drops is revisited. Both cases display boundary-layer behaviour and the method of matched asymptotic expansions is used to obtain solutions. These give good agreement when compared with numerical results. The sessile solu…
The intensity profile of the X-ray reflection from a crystalline material is related to the lattice disorder and the distribution of crystal sizes through its Fourier cosine coefficients. However, existing methods of obtaining these structural parameters from the coefficients require more than one order of reflection…