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Abstract X‐ray measurements on 16 different specimens of regenerated cellulose reveals that there exists a pronounced negative correlation between the integrated intensity of the 101 interference and its halfwidth. The 101 plane is a preferred cleavage plane and represents the lamellar plane of the ribbon‐shaped cryst…
A method is described for the determination of the amorphous content of polythene samples, based on a microphotometric comparison of the intensities of the amorphous band and the two strongest crystalline lines on X-ray powder photographs obtained from the samples in sheet form. Corrections for two types of orientatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Fat SplittingLucio LascarayCite this: Ind. Eng. Chem. 1949, 41, 4, 786–790Publication Date (Print):April 1, 1949Publication History Published online1 May 2002Published inissue 1 April 1949https://doi.org/10.1021/ie50472a025RIGHTS & PERMISSIONSArticle Views539Alt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotosensitive GlassS. D. StookeyCite this: Ind. Eng. Chem. 1949, 41, 4, 856–861Publication Date (Print):April 1, 1949Publication History Published online1 May 2002Published inissue 1 April 1949https://pubs.acs.org/doi/10.1021/ie50472a042https://doi.org/10.1021/ie50472a042re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Kinetics of the Decomposition of Potassium Persulfate in Aqueous Solutions of MethanolPaul D. Bartlett and John D. CotmanCite this: J. Am. Chem. Soc. 1949, 71, 4, 1419–1422Publication Date (Print):April 1, 1949Publication History Published online1 May 2002Published iniss…
Abstract The method for the evaluation of the percentage crystallinity in cellulose preparations from x‐ray intensity measurements, previously described in detail (J. Appl. Phys., in press) is reviewed briefly and new material presented consisting of crystallinity percentages between 8% and 70%. Cotton, flax, and rami…
Methods of correcting the systematic errors in electron-density maps due to using finite series of structure factors are discussed. Random errors in the maps are caused by experimental and computational rounding-off errors and by errors in the correction for finite series. Expressions are derived for the standard devi…
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Abstract A calculation of the maximum shear strain under which a two-dimensional close-packed lattice is stable has been carried out in terms of the forces between the lattice components. Two types of force were used; those between floating bubbles, which enabled a comparison with experiments on actual rafts of bubble…
Abstract A quantitative study of the mechanical properties of two-dimensional bubble rafts has been made. The elastic properties have been used to check the theory of the interaction of the bubbles, and reasonable agreement is obtained. The plastic properties are the main subject of this paper. Plastic deformation pro…