STABILIZATION OF NEWLY FORMED AMINO ACID METABOLITES IN SOIL BY CLAY MINERALS
Agricultural Research Department, Danish Atomic Energy Commission Research Establishment RisØ, DK-4000 Roskilde, Denmark
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
s‒f exchange interactions and magnetic semiconductors
The title of these lectures reflects the intent more strongly than the content of them. For while we are particularly interested in how the s-f interaction appears differently in magnetic semiconductors than in metals, in which it has been studied extensively, it seemed necessary after the first lecture on the metals…
Principles of rotational molding
Abstract Rotational molding is a process by which powdered or liquid plastics are converted into hollow articles. This paper is devoted to the theoretical understanding of the process of rotational molding. There are seven sections: The Art , wherein we describe the process, discuss previous attempts at understanding…
Effect of Conducting Particles on AC Corona and Breakdown in Compressed SF6
This paper describes studies of the effects of conducting particles on breakdown phenomena in compressed SF6 under alternating voltage conditions. Results with free particles of different shapes and materials are compared with those obtained with fixed particles for both parallel-plane and coaxial electrode geometrics…
A dynamical theory for the contrast of perfect and imperfect crystals in the scanning electron microscope using backscattered electrons
A many-beam dynamical theory, which apporoximately takes into account multiple inelastic scvattering, has been formulated and used to calculate the intensity of electrons backscattered from perfect and imperfect crystals. The contrast of channelling pattern lines is discussed, and the occurrence of ‘missing’ lines is…
Electrode “Polarization” in Alkali‐Containing Glasses
A model is proposed to explain the phenomenon of electrode “polarization” in glasses containing alkali oxides. The application of a dc potential to Pt electrodes on an alkali‐containing glass causes a large electric field to develop in the immediate vicinity of the anode. This high‐field region is formed by local diss…
Hydrodynamics of Cholesteric Liquid Crystals
The equations governing the linearized hydrodynamics of cholesteric liquid crystals are systematically deduced. They are valid for compressible as well as incompressible cholesterics and for arbitrary direction of mode propagation. The variables which contribute to the hydrodynamics are the conserved variables, mass d…
High-speed photography of laser-induced breakdown in liquids
A giant pulse of a ruby laser is focused into water, silicone oils, and some other liquids. High-speed photography of the focal region with picture repetition rates up to 850 000 pps shows the dynamics of the produced bubbles. These are extremely well suited to study cavitation bubble dynamics. Spherical almost empty…
Refinement of the crystal structure of stibnite, Sb2S31
A refined set of atomic coordinates and temperature parameters have been obtained for stibnite, Sb 2 S 3 . This structure contains parallel (Sb 4 S 6 ) n chains, which are linked to form crumpled sheets (two per unit cell). The quinvalent Sb has fivefold coordination in a square pyramid, where the Sb is slightly displ…
Effect of the Solvent on Polymer Incompatibility in Solution
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of the Solvent on Polymer Incompatibility in SolutionL. Zeman and D. PattersonCite this: Macromolecules 1972, 5, 4, 513–516Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published inissue 1 July 1972https://pubs.acs.org/doi/10.1021/…
Preparation and Characterization of Four-Branched Star Polystyrene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of Four-Branched Star PolystyreneJ. E. L. Roovers and S. BywaterCite this: Macromolecules 1972, 5, 4, 384–388Publication Date (Print):July 1, 1972Publication History Published online1 May 2002Published inissue 1 July 1972https://pubs.acs.org/…
Surface-Charge Decay in Insulators with Nonconstant Mobility and with Deep Trapping
The motion of space charge initially located at the free surface of an insulator is studied as a function of time. Analytic results are given for the following cases: (a) mobility proportional to a power of the field; (b) mobility proportional to a power of the free-carrier concentration; and (c) fast deep trapping wh…
Optical Transition Probabilities for Trivalent Holmium in LaF3 and YAlO3
Optical absorption and emission intensities are investigated for trivalent holmium ions in crystals of LaF3 and YAlO3. Oscillator strengths of transitions to all levels up to 40 000 cm−1 were measured from absorption spectra recorded at 300°K. Corresponding oscillator strengths for transitions between J manifolds were…
The optical electrical and magnetic properties of the europium chalcogenides and the rare earth pnictides
Magnetism has been a topic of study since the ancient times of science. Judging by the number of papers appearing each year, the group of scientists concerned with the properties of magnetic materials is vastly expanding. The reason for the great interest in this field is not only the wide application which these mate…
Configurational Excitations in Condensed Matter, and the ``Bond Lattice'' Model for the Liquid-Glass Transition
The characteristics of glasslike transitions in supercooled liquids and plastic crystals are discussed and a nearest neighbor interaction scheme, termed the ``bond lattice'' model, is proposed to account for the thermodynamic aspects of the phenomenon. Although the excitations of the bond lattice have features in comm…
Thermal behavior of annealed organic glasses
Abstract The influence of annealing processes on the thermal behavior of organic glasses in the glass‐transition interval has been investigated and analyzed quantitatively. In detailed annealing studies of atactic polystyrene and Aroclor 5460, the absorption of thermal energy superposed on the increase in the specific…
High precision de Haas-van Alphen measurements in the noble metals
The de Haas-van Alphen frequencies for the symmetry direction orbits and the (110) plane belly turning point have been measured in copper, silver and gold with an absolute precision of better than 2 in 10 5 and a relative precision approaching 1 in 10 6 . The infinite-field phases have been determined by extrapolation…
Ultrasoft-X-Ray Reflection, Refraction, and Production of Photoelectrons (100-1000-eV Region)
The reflection, refraction, and associated production of photoelectrons by ultrasoft x rays (10-100 \AA{}) can be important bases for the determination of material constants such as the linear x-ray absorption coefficients and the electron mean free paths. These may then be used to establish directly the photoionizati…
High Temperature Properties and Decomposition of Inorganic Salts Part 3, Nitrates and Nitrites
The literature dealing with the high-temperature behavior of inorganic nitrates and nitrites has been critically reviewed. Values of (GTo−H298o)/T of the reactants and products of the decomposition reactions were calculated and have been tabulated from 298 K up to as high a temperature as possible. Equilibrium constan…
Nematic-Liquid-Crystal Order—A Monte Carlo Calculation
The lattice version of the Maier-Saupe model of a nematic liquid crystal, in which all molecules are restricted to be on a simple-cubic lattice with periodic boundary conditions and to interact only with their nearest neighbors through the interaction energy ${E}_{\mathrm{ij}}=\ensuremath{-}\ensuremath{\epsilon}(\frac…