Materials Literature
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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 $…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarboxymethylcellulose in the Free Acid FormS. F. Dieckman, J. G. Jarrell, and R. S. VorisCite this: Ind. Eng. Chem. 1953, 45, 10, 2287–2290Publication Date (Print):October 1, 1953Publication History Published online1 May 2002Published inissue 1 October 1953https://pubs.acs.…
The UO 2 –Al 2 O 3 phase equilibrium system was found to contain no new compounds or solid solutions. Uranium dioxide melted at 2878°± 22°C. and Al 2 O 3 melted at 2034°± 16°C. The eutectic temperature was approximately 1930°C. There is an indication that two immiscible liquids formed above the eutectic temperature be…
Microphone carbon has been produced by deposition of pyrolytic carbon films over the surfaces of small spherules of silica. The properties of contacts between these spherules are shown to be dependent on the structure and geometry of the carbon surface as determined by electron diffraction and microscopic studies. The…
J. H. Rediske, A. A. Selders; The Absorption and Translocation of Strontium by Plants 1, Plant Physiology, Volume 28, Issue 4, 1 October 1953, Pages 594–60
(1953). THERMAL PROPERTIES OF TEXTILE MATERIALS. Journal of the Textile Institute Transactions: Vol. 44, No. 10, pp. T449-T476.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Cupric and Ferric Citrate Complexes1Robert C. Warner and Ione WeberCite this: J. Am. Chem. Soc. 1953, 75, 20, 5086–5094Publication Date (Print):October 1, 1953Publication History Published online1 May 2002Published inissue 1 October 1953https://pubs.acs.org/doi/10.1021/j…
Abstract After making preliminary tests of methods proposed by other investigators for determining the fixed potassium of soils and also of several new approaches, the approach found most promising — heating at 500° C for two hours — was investigated in considerable detail. It was found that on heating ammonium satura…