The electrical conductivity of black phosphorus has been measured as a function of temperature and pressure up to 350\ifmmode^\circ\else\textdegree\fi{}C and 8000 kg/${\mathrm{cm}}^{2}$. The Hall constant of the same material has been measured as a function of temperature at atmospheric pressure. At low temperatures $…

2D Materials and Applications

Bakerian Lecture: Dislocations, plastic flow and creep

Nevill Mott1953-10-22Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Abstract An outline is given of the experimental evidence that dislocations normally exist in crystalline solids, that they are formed during crystal growth and that they can move when the crystal is stressed. It is shown also from observations of silver halides that networks of dislocations can be formed, and also fr…

Microstructure and mechanical propertiesForce Microscopy Techniques and ApplicationsAdvanced Materials Characterization Techniques

Thermoelectric Power of Germanium below Room Temperature

H. P. R. Frederikse1953-10-15Physical Review

The thermoelectric power of germanium single crystals has been measured in the temperature range 10 to 300\ifmmode^\circ\else\textdegree\fi{}K. $N$-type samples of various impurity content have been investigated. Results show that the thermoelectric power $Q$ decreases with increasing concentration of carriers. A few…

Advanced Thermoelectric Materials and DevicesSurface and Thin Film PhenomenaThermal properties of materials

On the magnetic properties of covalent XY 6 complexes

K W H Stevens、Maurice Henry Lecorney Pryce1953-10-07Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Abstract An account is given of present ideas about the electron orbits in octahedral complexes containing 4d and 5d transition elements, with particular reference to paramagnetic resonance. The complex is treated by the method of molecular orbitals with the assumption that the magnetic carriers are partly in central…

Magnetism in coordination complexesMolecular spectroscopy and chiralityAdvanced NMR Techniques and Applications

Responses of Plants to Rhenium

R. D. Wood、Henrietta Harrison1953-10-01PLANT PHYSIOLOGY

Preliminary studies of the effects of rhenium salts on plants were initi- ated by the junior author at Harvard University during 1946 and 1947 under the direction of Professor K. V. Thimann. The interest in this metal was stimulated by his results in an earlier proj ect testing physiological effects of various unusual…

Diatoms and Algae Research

The Chemistry of Bipyrryls. II. The Preparation and Resolution of A 1,1'-Disubstituted 2,2'-Bipyrryl Exhibiting Restricted Rotation

James L. A. Webb1953-10-01The Journal of Organic Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Chemistry of Bipyrryls. II. The Preparation and Resolution of A 1,1'-Disubstituted 2,2'-Bipyrryl Exhibiting Restricted RotationJames L. A. WebbCite this: J. Org. Chem. 1953, 18, 10, 1413–1417Publication Date (Print):October 1, 1953Publication History Published online1 Ma…

Porphyrin and Phthalocyanine Chemistry

Effect of a Metal Plate on Total Reflection

W. Culshaw、D. S. Jones1953-10-01Proceedings of the Physical Society Section B

The phase changes which occur on total reflection are modified when a metal plate is placed near and parallel to a totally reflecting boundary. In particular the phase difference between plane waves of equal amplitude, polarized in and perpendicular to the plane of incidence, can be varied from -π through zero and up…

Optical Coatings and Gratings

Gutta. II. Interconversion of alpha and beta forms

H. M. Leeper、Walter Schlesinger1953-10-01Journal of Polymer Science

Abstract The gutta isolated from chicle has been demonstrated to be structurally identical with trans ‐polyisoprene from gutta percha and balata but has a molecular weight of 16,000–18,000, about one‐half that of the latter two polymers. Its ease of purification and marked crystalline behaviour suggested its use in a…

biodegradable polymer synthesis and propertiesNatural Fiber Reinforced CompositesPolymer crystallization and properties

Binary Mixtures of UO 2 and Other Oxides

Leo F. Epstein、William H. Howland1953-10-01Journal of the American Ceramic Society

The phase diagrams of the binary systems containing UO 2 and the oxides MgO, Al 2 O 3 , and BeO have been constructed using (1) the laws of ideal solutions and (2) the approximation that the entropy of fusion of polyatomic molecules is N R , where N is the number of atoms per molecule. Reasonable values of the eutecti…

Nuclear reactor physics and engineeringRadioactive element chemistry and processingNuclear Materials and Properties

Structure and Moisture Permeability of Film-Forming Polymers

Paul W. Morgan1953-10-01Industrial & Engineering Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Moisture Permeability of Film-Forming PolymersP. W. MorganCite this: Ind. Eng. Chem. 1953, 45, 10, 2296–2306Publication Date (Print):October 1, 1953Publication History Published online1 May 2002Published inissue 1 October 1953https://pubs.acs.org/doi/10.1021/ie…

Synthesis and properties of polymersPolymer crystallization and propertiesPolymer Nanocomposites and Properties

Rapid Precipitation of Barium Sulfate

R. B. Fischer、R. B. Rhinehammer1953-10-01Analytical Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRapid Precipitation of Barium SulfateR. B. Fischer and R. B. RhinehammerCite this: Anal. Chem. 1953, 25, 10, 1544–1548Publication Date (Print):October 1, 1953Publication History Published online1 May 2002Published inissue 1 October 1953https://pubs.acs.org/doi/10.1021/ac6008…

Chemical and Physical Properties in Aqueous SolutionsMine drainage and remediation techniquesCalcium Carbonate Crystallization and Inhibition

Preparation of Soluble Yarns by the Carboxymethylation of Cotton

George C. Daul、Robert M. Reinhardt、J. David Reid1953-10-01Textile Research Journal

Water- and alkali-soluble cotton fibers, yarns, and threads have been prepared by two methods. The cotton is preferably pretreated by pressure-kiering in 2% sodium hydroxide to remove the noncellulosic materials, and then treated with monochloroacetic acid and sodium hydroxide by either a one-step or a two-step proces…

Textile materials and evaluationsDyeing and Modifying Textile Fibers

Viscosity and Electrical Resistivity of Molten Alkali Borates

L. Shartsis、W. Capps、S. Spinner1953-10-01Journal of the American Ceramic Society

The viscosity and electrical resistance of members of the systems Li 2 O–B 2 O 3 , Na 2 O–B 2 O 3 , and K 2 O–B 2 O 3 have been measured in the approximate temperature range 600° to 1000°C. The log viscosity isotherms in the range 700° to 800°C. showed a minimum in the low‐alkali region followed by a maximum as the al…

Material Dynamics and PropertiesGlass properties and applicationsAdvanced Battery Materials and Technologies