Excitation of Spin Waves in a Ferromagnet by a Uniform rf Field
It is important to avoid taking the Laplacian of H. Variation of the Elastic Constants of CrystallineAluminum with Temperature between 53'K and 773'K, PAUL M
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The structure of vanadinite
Two-dimensional Fourier and difference syntheses have been used to solve and refine the structure of vanadinite, Pb 5 (VO 4 ) 3 Cl. The isostructural relation ship of vanadinite to other apatite-like minerals has been confirmed. The chlorine ion is surrounded by 6 divalent Pb ions at the corners of a regular octahedro…
Effects of Crimp and Cross-Sectional Area on the Mechanical Properties of Wool Fibers
Force-extension data for a large number of wool fibers of various types have been analyzed in detail by statistical methods in order to determine the effects of fiber crimp and cross-sectional area on mechanical behavior. During the initial stages of crimp removal, the extensional behavior is controlled by fiber bendi…
Die Pyrolyse des α‐ und β‐Methyl‐naphthalins
Abstract Die Pyrolyse von α‐ und β‐Methyl‐naphthalin liefert im Gegensatz zu derjenigen des Naphthalins keine durch primäre Kernverknüpfung entstandenen Kohlenwasserstoffe. Aus α‐Methyl‐naphthalin wurden Picen (II), 1.2;5.6‐Dibenzo‐anthracen (III), 1.2;7.8‐Dibenzo‐anthracen (IV), und 3.4‐Benzo‐tetraphen (V) gewonnen.…
Untersuchung der binären Systeme BaOSnO2 und BaOPbO2. I. Phasenanalysen
Abstract Die Systeme BaOSnO 2 und BaOPbO 2 , die als Komponenten von Mischkristallen mit wertvollen dielektrischen Eigenschaften auftreten, wurden näher untersucht. Durch thermische Analyse und auf Grund von D EBYE ‐S CHERRER ‐Diagrammen wurden in den beiden Systemen je zwei Verbindungen aufgefunden und durch Reakti…
The sulphides, Selenides, and Tellurides of Titanium, Zirconium, Hafnium, and Thorium. II. Chemical properties
Reactions of the main phases (AXn where n=l) occurring in the 12 systems ,comprising the sulphides, selenides, and tellurides of Ti, Zr, Hf, and Th are discussed. These reactions include those with oxygen, chlorine, alkali metals, sulphur, and selenium, acids, alkalis, oxidizing agents, alcohols, hydrogen, and thermal…
Two Hall Effects of Iron-Cobalt Alloys
The Hall coefficients and the resistivity of Fe-Co alloys have been measured at 77\ifmmode^\circ\else\textdegree\fi{}K, 169\ifmmode^\circ\else\textdegree\fi{}K, and room temperature using fields up to 3.3 webers/${\mathrm{m}}^{2}$. For up to 0.2% Co in Fe the ordinary Hall coefficient ${R}_{0}$ is positive at room tem…
Nitrogen-Nitrogen Elastic Scattering
An optical-model analysis of the measurements of nitrogen-nitrogen elastic scattering is made, and a quasi-classical discussion of the corresponding phase shifts is given.Received 24 July 1958DOI:https://doi.org/10.1103/PhysRev.112.1722©1958 American Physical Society
Mechanism of stress-corrosion cracking in the az31b magnesium alloy
The mechanism of s tre?s-co rrosion crt;tcking of annealed AZ31B magnesium a lloy in an a queous ~aClI(2 CrO . solutIOn was lI1vestlgated . Cracking was predom ina ntly an electrochem ical pro.cess a nd was s hown to be dependent on t he rate of stra in i n t he sp ecim en f01l0wtng load lll g ] 11 tensIOn. It ] S pos…
X-Ray Diffraction and Magnetic Measurements of the Fe-Cr Spinels
X-ray diffraction intensity measurements and magnetic moment measurements were made on the spinel system $\mathrm{Fe}{\mathrm{Fe}}_{2\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{4}$, $0\ensuremath{\le}x\ensuremath{\le}2$, for the purpose of finding structural details in this system which were unknown. The x-ray meas…
The formation of negatively birefringent spherulites in polyhexamethylene adipamide (nylon 66)
Abstract Crystallization of nylon 66 at and above the optical melting point of the polymer has been studied. When heated at constant temperature in the ∼250–265°C. range, the polymer, originally crystallized in the form of positively birefringent spherulites, melts and subsequently crystallizes in the form of negative…
Polymeric Phthalocyanines. II1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymeric Phthalocyanines. II1C. S. Marvel and Michael M. MartinCite this: J. Am. Chem. Soc. 1958, 80, 24, 6600–6604Publication Date (Print):December 1, 1958Publication History Published online1 May 2002Published inissue 1 December 1958https://doi.org/10.1021/ja01557a037Requ…
The pyrolysis of dimethylpolysiloxanes
Abstract The pyrolysis of linear dimethylpolysiloxanes was investigated by weight loss studies in vacuum over the temperature range 360–540°C. Rate maxima were observed at 14–16% weight loss; these were attributed to the presence of ionizable impurities in the polymer molecules.
Infrared spectroscopy of polyethylene terephthalate
Abstract The absorption spectra of polyethylene terephthalate, polyethylene‐D 4 terephthalate and polyethylene terephthalate‐D 4 were investigated. From these spectra and those of other known compounds, assignments were made for most of the bands in the 2 to 15 micron region. The 13.7 μ band was shown to be due to the…
Static electricity in polymers. I. Theory and measurement
Abstract A versatile instrument, The Static Propensity Tester, was constructed for the measurement of the rate of electrostatic charge build up and decay on polymer films and fabrics. The tester was used for measuring the rates of both positive and negative potentials in the voltage range of 1000–10,000 volts. From su…
Reactions Of Boron Trichloride With Organic Compounds
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions Of Boron Trichloride With Organic CompoundsW. Gerrard and M. F. LappertCite this: Chem. Rev. 1958, 58, 6, 1081–1111Publication Date (Print):December 1, 1958Publication History Published online1 May 2002Published inissue 1 December 1958https://pubs.acs.org/doi/10.10…
Polarization Reversal in Tri-Glycine Fluoberyllate and Tri-Glycine Sulfate Single Crystals
Time and field dependence of switching current at room temperature was studied for tri-glycine fluoberyllate as well as for tri-glycine sulfate. It is shown that the theory describing polarization reversal in BaTiO3 c-domain crystals based on observed time and field dependence of polarization P=f(E,t) developed by the…
The degradation of polymer molecules in solution under the influence of ultrasonic waves. Part I. Kinetic analysis
Abstract Starting from the assumption that a polymer molecule in solution will only degrade under the influence of ultrasonic irradiation if both the resulting fragments are greater than P e /2 in size, where P e is the so‐called limiting degree of polymerization, rela tionships are derived giving the rate of degradat…
Method for Growing Large CdS and ZnS Single Crystals
A new technique for growing single crystals of CdS and ZnS has been devised in which single crystals up to 115 g in weight are obtained. The conversion of sphalerite into wurtzite and vice versa is described. The growth mechanism of the single ZnS crystals is described and compared with that for CdS crystals previousl…
The Effects of Ionizing Radiation on Natural and Synthetic High Polymers.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Effects of Ionizing Radiation on Natural and Synthetic High Polymers.Malcolm DoleCite this: J. Am. Chem. Soc. 1958, 80, 24, 6694Publication Date (Print):December 1, 1958Publication History Published online1 May 2002Published inissue 1 December 1958https://pubs.acs.org/do…