Kinetics of the electrocrystallization of thin films of calomel
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The Anodic Oxidation of Iron in a Neutral Solution
Iron was anodically oxidized in a borate‐boric acid buffer solution of p H 8.4 in the potential range extending from the active region to oxygen evolution. In the active region there appeared to be some on the surface. In the passive region the iron was covered with an oxide film 10–30Aå thick, depending on the potent…
Theoretical Analysis of Current Distribution in Porous Electrodes
General equations describing the behavior of porous electrodes are developed. These equations are used to determine the initial and the steady‐state conditions in one‐dimensional porous electrodes of uniform geometry and polarization parameters. In particular, it is shown that the current and reaction distributions in…
CYTOPLASMIC COMPONENTS IN HEPATIC CELL LYSOSOMES
De Duve and his colleagues, a few years ago, originated the concept of lysosomes based on the biochemical analysis of isolated cytoplasmic particles (1). He reported that a number of hydrolytic enzymes are concentrated in a fraction consisting of small subcellular units which sediments between the usual mitochondrial…
The detection of sub-units within the crystallographic asymmetric unit
In this paper, Rossmann & Blow describe how they have detected the existence of partial, approximate symmetry from a knowledge of the intensities alone. The effect of noncrystallographic symmetry, whether partial or total, results in decreasing the size of the structure to be determined, while the number of observable…
The plastic deformation of polycrystalline aggregates
For a number of metallic polycrystalline aggregates, it is shown experimentally that [sgrave]f, the flow stress at constant strain, is related to the grain diameter l by where [sgrave]0 and k are constants. This has the same form as the relationship between the lower yield point, when this occurs, and grain size. An e…
The dynamic properties of carbon black‐loaded natural rubber vulcanizates. Part I
Abstract The dynamic properties of a natural vulcanized rubber containing carbon black were studied for dynamic tensions of amplitude varying greatly. It was shown that both the elastic responses and viscosity change with amplitude of oscillation and with concentration and type of carbon black. The effects of thermal…
Melting process and the equilibrium melting temperature of polychlorotrifluoroethylene
A new method of estimating the equilibrium melting temperature, Tm, of a polymer isdescribed, and applied to polychlorotrifluoroethylene (PCTFE). Experimentally de-termined values of the so-called observed melting point,!F^(obs), are plotted as a function of the isothermal crystallization temperature, Tx. When freed o…
Zur Kenntnis der Azulene, IX. Azulen‐π‐Komplexe
Abstract Es werden Darstellung und Eigenschaften einiger kristallisierter Azulen‐Tetracyanäthylen‐Komplexe und deren Umwandlung in 1‐ bzw. 3‐Tricyanvinyl‐azulene beschrieben.
The structure of haemoglobin VIII. A three-dimensional Fourier synthesis at 5.5 Å resolution: determination of the phase angles
Abstract Determination of the phase angles of a crystalline protein requires a series of isomorphous heavy-atom compounds, with heavy atoms attached to different sites on the protein molecule. The asymmetric unit of horse oxyhaem oglobin was found to combine with heavy atoms at two different sites which are now known…
Ion-Pair Resonance Mechanism of Energy Transfer in Rare Earth Crystal Fluorescence
Received 22 November 1961DOI:https://doi.org/10.1103/PhysRevLett.7.442©1961 American Physical Society
Static Dielectric Constant of Rutile (TiO2), 1.6-1060°K
The static dielectric constant $\ensuremath{\epsilon}$ of rutile has been measured as a function of temperature from 1.6 to 1060\ifmmode^\circ\else\textdegree\fi{}K. Rutile does not appear to be ferroelectric or antiferroelectric in this temperature range. At low temperatures, $\ensuremath{\epsilon}$ approaches a limi…
über bi‐ und polycyclische Azulene, XLVIII. Einige Reaktionen von Azulen‐Aldehyden, ‐Nitrilen und ‐Carbonsäuren
Abstract Azulenaldehyde‐(1 bzw. 3) sowie die entsprechenden Nitrile und Carbonsäuren geben als Pseudoaromaten unter geeigneten Bedingungen Reaktionen der analogen benzoiden Verbindungen, wobei in einigen Fällen die funktionelle Gruppe abgespalten wird. Die Azulenaldehyde entsprechen in ihrem Reaktionsvermögen weitgehe…
Spin-lattice relaxation in rare-earth salts: field dependence of the two-phonon process
Abstract The field dependence of the two phonon process is computed taking into account hyperfine and dipolar fields. The general Gorter-Van Vleck-Hebel-Slichter (G.V.H.S.) formalism is adapted to the rare-earth ions, the effective Hamiltonian techniques of the previous paper being used. It is found that a distinction…
Spin-lattice relaxation in rare-earth salts
Abstract A general approach to spin-lattice relaxation is given for salts to which a crystalline field theory is appropriate. In particular, the theory of Elliott & Stevens for the interaction of a rare-earth ion with static ionic surroundings is generalized phenomenologically to represent the interaction of the r…
Health Aspects of the Commercial Melting of Radium Contaminated Ferrous Metal Scrap
Procedures and tests are described whereby it is shown that radium in ferrous metal scrap is virtually all removed in the slag on remelting. The smelting of radium-contaminated ferrous scrap can be performed with safety for the workers by use of proper ventilation and other simple precautions. The purified ferrous met…
A Modification of the Method for Defining and Measuring Crimp of Textile Fibers1
The main parameter used to describe the geometry of the crimp of a fiber is the crimp diameter. This corresponds to an average amplitude of the fiber in space while the fiber is kept in a static position of stress. In order to measure the crimp diameter, it is necessary to measure the coordinates of a sufficient numhe…
Harmonic Generation and Frequency Mixing in Ferromagnetic Insulators
When a transverse rf magnetic field is applied to a ferromagnetic insulator, a second harmonic frequency term arises in mz (the axial or longitudinal component of the rf magnetization). If in addition an axial component of the rf field is applied, then a second harmonic frequency term appears in mt (the transverse com…
Algal species lists
During the joint meeting of the British Phycological Society and the Soci~t~ Phycologique de France held in the Channel Islands in September 1960 a number of excursions were made to various localities in Guernsey, Herm and Sark.Algal records collected during these excursions are listed below.It should be realised that…
An Analysis of the Infrared Absorption Spectrum of Am+3(5f6) in LaCl3
The polarized infrared absorption spectrum of single crystals of Am+3(5f6) in LaCl3 has been studied from 0.79 to 16.0 μ. In almost every instance the spectrum is sharp and completely polarized, and appears in definite groupings. Transitions from the ground level, 7F0, to excited levels of the ground term, 7F1, 7F2, 7…