Materials Literature
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Abstract The residual lattice strain observed by X-ray diffraction methods in plastically extended polycrystalline aggregates has been investigated. It is shown that, if several diffraction lines are examined, the residual lattice strains vary both in magnitude and in sign. It is known that one of the causes of intern…
A bstract Experimental low‐temperature viscosity data obtained by the fiber‐elongation method are presented for simple three‐ and four‐component alkali‐alkaline earth‐alumina silicate glasses. In this study, soda, potash, calcia, magnesia, strontia, baria, and alumina were systematically substituted molecularly for si…
Progress of Theoretical Physics Vol. 2 No. 2 (1947) pp. 63–70 On the Effect of the Field Reactions on the Interaction of Mesotrons and Nuclear Particles. IV Shin-ichirô Tomonaga Progress of Theoretical Physics Vol. 3 No. 1 (1948) pp. 26–37 On Wentzel's Method in the Meson Theory Tatuoki Miyazima, Takao Tati and Sin-it…
(1949). MEASURING THE SWELLING OF FIBRES IN WATER. Journal of the Textile Institute Proceedings: Vol. 40, No. 7, pp. P674-P688.
A theoretical method is described for reducing the diameter of the central bright disk in the diffraction pattern produced by an objective from an unresolved pinhole as object. On the basis of the Airy criterion the limit of resolution is therefore improved. The method offers a systematic approach for discovering how…
By increasing the thickness of the natural oxide film on evaporated aluminum mirrors, a much better surface protection can be achieved. Heat treatment in air is not practical for producing protective coatings on aluminum because the temperature required is more than 400°C and oxide films formed at this temperature are…
A bstract Using an improved technique, precision measurements of viscosities in the annealing range of temperature were made on sodium, potassium, and sodium‐potassium silicate glasses containing from 10 to 40 mol % alkali. The viscosities of certain of those glasses that contain both Na 2 O and K 2 O reach minima, an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Viscosity of Suspensions of Spheres.James V. RobinsonCite this: J. Phys. Chem. 1949, 53, 7, 1042–1056Publication Date (Print):July 1, 1949Publication History Published online1 May 2002Published inissue 1 July 1949https://doi.org/10.1021/j150472a007RIGHTS & PERMISSIONSArt…
Abstract Ga 2 S 3 kristallisiert in zwei Modifikationen; einer α‐Form mit Zinkblendegitter, a = 5,17 1 Å, die bei tiefen Temperaturen stabil ist, und einer Hochtemperaturmodifikation (β) mit Wurtzitstruktur, a = 3,67 8 Å; c = 6,01 6 Å; c/a = 1,63 6 . Die Umwandlungstemperatur liegt zwischen 550 und 600° C. 2. Ga 2 Se…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation and Properties of the Group IV-B Metal BorohydridesH. R. Hoekstra and J. J. KatzCite this: J. Am. Chem. Soc. 1949, 71, 7, 2488–2492Publication Date (Print):July 1, 1949Publication History Published online1 May 2002Published inissue 1 July 1949https://pubs.acs…
In seeking to circumvent the difficulties that have limited production of ruled gratings having resolving powers in excess of 400,000, it is observed that resolving power at a given wave-length depends only on the ruled width of the grating and the angles of illumination and observation, and not specifically on the nu…
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