The flow properties of microcrystalline cellulose powders
Keith Marshall, David Sixsmith; The flow properties of microcrystalline cellulose powders, Journal of Pharmacy and Pharmacology, Volume 28, Issue 10, 1 Oct
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The preferential trapping of interstitials at dislocations
The swelling of metals during irradiation is due to the preferential drift of interstitials to dislocations thus allowing vacancies to condense in excess of interstitials at voids. Previously the dislocation preference for interstitials has been calculated from an isolated dislocation model, here the effect of the com…
Current and Potential Distributions in Plating Corrosion Systems
The numerical determination of current and potential distributions has been performed for plating corrosion systems, where failure to coat a small area leads to corrosion at the pinhole. The distributions depend on characteristic parameters for the disk anode and surrounding plane cathode and reveal that each of the e…
Optical transitions from d core states in amorphous selenium, arsenic and arsenic triselenide
Absorption measurements on amorphous selenium, arsenic and arsenic triselenide have been performed using synchrotron radiation. The results obtained reveal the importance of many body effects, matrix elements, and site of the initial state in the interpretation of optical data corresponding to transitions from core le…
Präparation von SrNiO2‐Einkristallen mit eben koordiniertem Nickel
Abstract SrNiO 2 ‐Einkristalle wurden bei hohen Temperaturen unter O 2 ‐Druck dargestellt. SrNiO 2 ist isotyp mit SrCuO 2 (Raumgruppe D —Cmcm, a = 3,581, b = 16,362, c = 3,915 Å) Die kristallchemische Verwandtschaft zum K 2 NiF 4 ‐Typ wird diskutiert.
The effect of cobalt substitutions on some properties of manganese zinc ferrites
The effect of cobalt substitutions in manganese zinc ferro ferrites for inductor applications is discussed. Permeability-temperature curves are presented over the range -50 degrees C to 200 degrees C for compositions where the cobalt level is varied between 0 and 0.010 per formula unit, the Mn/Zn ratio and Fe 2+ level…
A Mössbauer Study of Graphite Intercalated with Iron(III) Chloride and Aluminum Chloride
Abstract The Mössbauer spectra of graphite–FeCl3 and graphite–FeCl3–AlCl3 compounds with varying FeCl3/AlCl3ratios were measured. At 298 K, the isomer shift of the Fe3+ peak of FeCl3 intercalated in the graphite–FeCl3 compounds was larger than that of pure anhydrous FeCl3, and two sets of Fe2+ quadrupole doublets appe…
Unusual hydrogen bonds. A neutron diffraction study of the hydrogen dinitrate ion, (O2NO.cntdot.H.cntdot.ONO2)-, in cesium hydrogen dinitrate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusual hydrogen bonds. A neutron diffraction study of the hydrogen dinitrate ion, (O2NO.cntdot.H.cntdot.ONO2)-, in cesium hydrogen dinitrateJacques. Roziere, Marie T. Roziere-Bories, and Jack M. WilliamsCite this: Inorg. Chem. 1976, 15, 10, 2490–2494Publication Date (Print)…
Triazole, Benzotriazole, and Naphthotriazole as Corrosion Inhibitors for Brass
The use of triazole, benzotriazole, and naphthotriazole as corrosion inhibitors for brass is briefly reviewed. The corrosion of 70/30 brass immersed in a wide range of solutions is reported both with and without the inhibitors. The inhibitor efficiency of benzotriazole is given as a function of the solution pH and the…
Ordered and disordered phases in mixed dodecylammonium and hexadecylammonium tetrachloromanganate(II)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered and disordered phases in mixed dodecylammonium and hexadecylammonium tetrachloromanganate(II)Vincenzo Salerno, Andrea Grieco, and Michele VacatelloCite this: J. Phys. Chem. 1976, 80, 22, 2444–2448Publication Date (Print):October 1, 1976Publication History Published o…
Stress distribution within circumferential clasp arms
An analysis of stress distributions within circumferential clasp arms with various tapers, was undertaken in an effort to (1) determine the area of maximum stress concentration in both tapered and non-tapered clasps, and (2) to compare this point of maximum stress concentration with the area of frequent clasp breakage…
Photochromism in Ni-doped SrTiO3
Electron-paramagnetic-resonance conversion-rate measurements combined with optical-absorption data in Ni-doped ${\mathrm{SrTiO}}_{3}$ have been carried out. From these experiments in oxidized and reduced crystals, assignment of the photochromic bands in the visible could be made and the trapping mechanism identified.…
New materials for optical thin films
New materials for optical thin films are presented. Zirconium oxide, titanium oxide, cerie oxide, and hafnium oxide in the form of black tablets or cones of various sizes for the electron beam evaporation technique were developed. These materials are oxygen depleted and give an uniform melt during the evaporation to g…
Differentiation in Avian Keratinocytes
An investigation to determine the number of proteins comprising the keratin of the chick down feather was carried out using anion‐exchange chromatography of the carboxymethylated derivatives of reduced feather proteins, followed by examination of discrete protein fractions by polyacrylamide gel electrophoresis at pH 9…
Thermal properties of collagen in helical and random coiled states in the temperature range from 4° to 300°K
Abstract The low‐temperature heat capacity of collagen (in the hydrated and dehydrated states) and the large entropy of collagen in the coiled state relative to the same protein in the helical state were investigated. The heat capacity for collagen in the solid state in the temperature range 4°–50° K changes proportio…
Induced side forces at high angles of attack
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Crystal data for lanthanide orthophosphates
Monoclinic unit-cell parameters for LnPO4 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb and Dy) have been redetermined from Guinier photographs, and are plotted against effective ionic radii of the lanthanides. Full powder-diffraction data are given for LaPO4 and GdPO4.
Tetrahalo- and (mixed-tetrahalo)cuprates of the piperazinium dication. Coordination geometry changes in some CuX42- anions
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetrahalo- and (mixed-tetrahalo)cuprates of the piperazinium dication. Coordination geometry changes in some CuX42- anionsGiuseppe Marcotrigiano, Ledi Menabue, and Gian C. PellacaniCite this: Inorg. Chem. 1976, 15, 10, 2333–2336Publication Date (Print):October 1, 1976Publica…
Preparation of Polyvinylamine by the Hofmann Degradation of Polyacrylamide
Abstract Polyvinylamine which contained 95.6 mol% amine units was obtained when the Hofmann degradation was applied to polyacrylamide by use of a very slight excess of sodium hypochlorite and a large excess of sodium hydroxide at 0 to −15 °C for about 15 h. Polyvinylamine hydrochloride (PVAm·HCl) was isolated almost q…
Collective electron description of the conduction mechanism inMxFe3−xO4,M=Cd,Zn
For ${\mathrm{Cd}}_{x}{\mathrm{Fe}}_{3\ensuremath{-}x}{O}_{4}$ and ${\mathrm{Zn}}_{x}{\mathrm{Fe}}_{3\ensuremath{-}x}{O}_{4}$, the conduction-electron concentration has been varied over a wide range without the introduction of $B$-site impurities or defects. Analysis of the $^{57}\mathrm{Fe}$ M\"ossbauer-effect data i…