The corrosion products of an ancient Chinese bronze
Examines the analysis of a fragment of a bronze, Chinese vessel.
Materials Literature
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Elastic Modulus and Swelling of Butyl Vulcanizates
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic Modulus and Swelling of Butyl VulcanizatesR. L. Zapp and Eugene GuthCite this: Ind. Eng. Chem. 1951, 43, 2, 430–438Publication Date (Print):February 1, 1951Publication History Published online1 May 2002Published inissue 1 February 1951https://pubs.acs.org/doi/10.1021…
On the Theory of Plastic Deformation
A model for plastic deformation in soft metals, i.e. metals which are not age-hardened or severely cold-worked, is given. It is based on the assumption that in real crystals there is always a number of regions present which, by an unknown process, act as sources of dislocations. Furthermore, it is assumed that in soft…
Measurements of Gamma-Ray Absorption Coefficients
The absorption of $\ensuremath{\gamma}$-rays in Al, Cu, Sn, Ta, and Pb was measured using $\ensuremath{\gamma}$-rays from ${\mathrm{I}}^{131}$, ${\mathrm{Cu}}^{64}$, ${\mathrm{Mn}}^{54}$, ${\mathrm{Co}}^{60}$, ${\mathrm{Zn}}^{65}$, and ${\mathrm{Na}}^{24}$. Tests showed that scattering from nearby objects and from the…
Studies in carotenogenesis. 1. General conditions governing β-carotene synthesis by the fungus Phycomyces blakesleeanus Burgeff
1. The amount of pseudo-cholinesterase in the livers of adult male rats decreased from 96 to 70 units/100 g. initial body weight during a 6-day fast, but the activity per g. liver changed very little, and the activity of the serum enzyme remained constant at 7-1 units/ml. serum.
King-Armstrong Phosphatase Estimation by the Determination of Liberated Phosphate
If the disodium phenylphosphate contains appreciable inorganic phosphate the solid material should be extracted with 95% alcohol in a Soxhlet.
Über die katalytische Ammoniak‐Oxydation und die schnellverlaufenden katalytischen Prozesse
Abstract Die Theorie der schnellverlaufenden katalytischen Prozesse wird weiterentwickelt und für den Fall der Ammoniak‐Oxydation 1 ) erläutert. Einfache Beispiele werden herangezogen, zugleich wird eine allgemeine Theorie der Ammoniak‐Oxydation gegeben. Als Grundlagen werden im wesentlichen Ergebnisse eigener systema…
Replica techniques in electron microscopy
Precautions for obtaining clean and reliable replicas for the study of large areas of metal surfaces are outlined. Modifications to the backed replica technique, and the application of preshadowing in metallographic studies are described.
Physical changes in rubbing surfaces on scuffing
Cast-iron surfaces rubbing against steel have been found to develop a thin layer of a white constituent when scuffing occurs or is approached. This material has not been fully identified, but the results point to it having a basis of two phases, viz. cementite and a quenched high-carbon ferritic phase developed from a…
Échanges de chaleur dans l'hydrogène bouillant sous pression atmosphérique
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439. The configuration of flexible polymethylene molecules in the gas phase
The first page of this article is displayed as the abstract.
301. The oxides of uranium. Part II. The binary system UO 2 –CaO
K. B. Alberman, R. C. Blakey and J. S. Anderson, J. Chem. Soc., 1951, 1352 DOI: 10.1039/JR9510001352
The Relation of Length to Other Physical Properties of Cotton Fibers
Results are reported on tests of breaking load and elongation of single fibers at constant specimen length from the length groups of 6 cotton samples. A description is given of the instrument used in these tests. Average weight fineness of the center section of fibers from each length group was determined, and the ten…
The Entropies of Melting of Metals
The melting process can be conceived as consisting of first an expansion, and then a disordering of the crystalline structure. The entropy contribution from the first effect is calculated by analogy with the process occurring in a volume expansion within an individual phase; the entropy contribution from the melting d…
The Mobility of Electrons in Diamond
The mobility of electrons in diamond has been measured by means of the Hall effect. In agreement with the theory of Seitz, the mobility is inversely proportional to the three-halves power of the absolute temperature. The measured room temperature value of the mobility is 900 ${\mathrm{cm}}^{2}$/volt-sec as compared wi…
Évolution et aspect actuel du microscope électronique: Le congrès international de microscopie électronique, Paris, 14–22 September 1950
Resume Le Congres de Paris rassembla au mois de septembre de cette annee, 600 congressistes appartenant a 17 nations, qui apporterent plus de 120 communications originales et de tres nombreuses photographies; les Professeurs Wyckoff 2 , Finch 3 , Mark 4 , Cosslett 5 , firent quatre conferences d'ensemble particulierem…
Carotinoidsynthesen VIII. Synthese des Dodecapreno‐β‐carotins
Abstract Vitamin A wurde mit Aluminium‐t‐butylat und Aceton zum 4,8‐Dimethyl–10‐„1′,1′,5′‐trimethyl‐c.‐hexen‐(5′)‐yl‐(6′)”︁‐ decapentaen‐ (1, 3,5,7,9)‐methylketon kondensiert und letzteres in kristallisierter Form dargestellt (C 23 ‐Keton).
Dissoziationsregeln bei Polyaminen. Dissoziation und Quaternisierbarkeit
Abstract 1. Die Dissoziationszahlen einer Reihe von aliphatischen, gesättigten Polyaminen werden ermittelt und miteinander verglichen.
Vapor Pressure of Beryllium Oxide
The vapor pressure of beryllium oxide has been measured by a modification of the Knudsen effusion method, utilizing radioactive 4 Be 7 as tracer. In the experimental temperature range of 1950° to 2150°C the vapor pressure is given by the equation The boiling point of liquid beryllium oxide is estimated to be 4120 ± 17…
Effects of Mechanical Pressures on the Dielectric Properties of Polycrystalline Barium-Strontium Titanate
The effects of the following three kinds of mechanical pressures upon the dielectric properties of barium-strontium titanate ceramics have been investigated: (1) hydrostatic pressure, (2) compression parallel to the electrode surface and (3) compression normal to the electrode surface (as shown in Fig. 1). Especially…