Materials Literature
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The Cretaceous record of the diatoms presented here outlines our understanding of their early morphological development. Recent documentation of well preserved Lower Cretaceous (Aptian/Albian) diatom assemblages provides a window into the early history of the diatoms and serves as a base for comparing their subsequent…
Abstract
A new method is presented of partial discharge data analysis for the investigation of space charge and degradation phenomena in high-voltage insulation systems. The basic principles of the pulse-sequence-analysis (PSA) are illustrated and the characteristic differences with regard to standard procedures that have been…
Low protein adsorbing polymer films have been prepared with which to fabricate intravenous containers, designed for compatibility with low concentrations of protein drugs. The material is economically manufactured utilizing physical melt blending of water-soluble surface-modifying polymers (PEO, PEOX, PVA, and PNVP) w…
The chloroplast genome consists of homogeneous circular DNA molecules. To date, the entire nucleotide sequences (120-190 kbp) of chloroplast genomes have been determined from eight plant species. The chloroplast genomes of land plants and green algae contain about 110 different genes, which can be classified into two…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThrough-Bond and Long-Range Ferromagnetic Spin Alignment in a .pi.-Conjugated Polyradical with a Poly(phenylenevinylene) SkeletonHiroyuki Nishide, Takashi Kaneko, Takeshi Nii, Kohya Katoh, Eishun Tsuchida, and Kizashi YamaguchiCite this: J. Am. Chem. Soc. 1995, 117, 1, 548–5…
Lysozyme structures at six different temperatures in the range 95-295 K have been determined using X-ray crystallography at a resolution of 1.7 A. The crystals at lower temperatures had a 7.4% decrease in the unit-cell volume. The volume change was discontinuous with the volume being near 238 000 A(3) from 295 to 250…
The self-assembly, by means of a slippage procedure, of three novel rotaxanes incorporating, respectively, one, two and three bisparaphenylene-34-crown-10 macrocyclic components and a single branched component, consisting of three bipyridinium units attached covalently to a 1,3,5-trisubstituted benzene central core an…
We study certain approximate solutions of a system of equations formulated in an earlier paper (Physica D 43, 44-62 (1990)) which in dimensionless form are $$u_t + gamma w(phi)_t = abla^2u,,$$ $$alpha epsilon^2phi_t = epsilon^2abla^2phi + F(phi,u),,$$ where $u$ is (dimensionless) temperature, $phi$ is an order paramet…
A p-type diamond metal semiconductor field-effect transistor (MESFET) structure, utilizing a boron pulse-doped layer as the conducting channel, has been successfully fabricated. The pulse-doped structure consists of an undoped diamond buffer layer, a highly doped thin diamond active layer, and an undoped diamond cap l…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNO Reduction by Activated Carbons. 4. Catalysis by CalciumM. Jose Illan-Gomez, Angel Linares-Solano, Ljubisa R. Radovic, and Concepcion Salinas-Martinez de LeceaCite this: Energy Fuels 1995, 9, 1, 112–118Publication Date (Print):January 1, 1995Publication History Published o…
Experimental evidences of both weak and strong confinement regimes are reported on CdS nanocrystals embedded in a sodium borosilicate glass matrix. A method, based on the sol-gel technique, is used for the preparation of CdS-activated glass. This route is capable of providing nanocrystals covering a wide range of radi…
Introduction: proteins at interfaces - an overview, John L. Brasch and Thomas A. Horbett. Part 1 Theory and molecular mechanisms of protein adsorption: reversibility and the mechanism of protein adsorption, Willem Norde and Charles A. Haynes logarithmic growth of protein films, Simon Alaeddine and Hakan Nygren compara…
The thermodynamical properties, structure and rheology of laponite dispersions have been studied as a function of solid fraction and ionic strength. The dispersions undergo a transition from Newtonian liquid to viscoelastic solid without phase separation. The increase of the ionic strength shifts the transition to low…
During the last decade, solidification modeling has known a sustained development effort, supported by academic as well as industrial research. The driving force behind this undertaking was the promise of predictive capabilities that will allow process and material improvement. The most significant recent rogress has…
The solid state structure of the fluorinated 1,2,3,5-dithiadiazolyl radical [p-NCC6F4[graphic omitted]]· is reported; it is the first dithiadiazolyl radical to retain its paramagnetic character in the solid state.
The structure of the boundary region between a metal and a solution (the so-called electrical double layer) depends on the chemical nature of the metal and of the solvent, the type and amount of solute, and the structure of the metal surface. This article is focussed on the effect of varying the crystallographic orien…
The diffusional coherency strain theory and its implications for chemically induced migration of liquid films and grain boundaries are reviewed and critically examined. The critical experiments in metals and oxides show the validity of this theory. The observed characteristics of this phenomenon: misfit dislocations a…
A new type of experiment involving temperature-variable in situ(one-dimensional)27Al MAS NMR studies, in which the sample is heated and studied directly in the NMR tube, has been developed. In the particular case chosen for study, the thermal conversion of the layered double hydroxide Mg6Al3.4(OH)18.82(CO3)1.5(NO3)0.3…
Abstract The dispersions of both reactive and nonreactive polymer‐polymer blend systems achieved in three different mixers are compared. The dispersions are prepared using an industrial scale twin‐screw extruder, a laboratory internal mixer, and a miniature cup and rotor mixer. The morphology development in the three…