摘要:

AbstractThe birefringence of flow in solutions of macromolecular substances is discussed briefly from the point of view of flexible, randomly kinked molecules. The formulae obtained elsewhere5) are compared with experiments mentioned in the literature. The agreement is satisfactory. These formulae are based on the model offlexible, randomly kinkedmolecules. It would seem to us that the experimental evidence must be regarded as a substantial support for this model.

ISSN:0165-0513    

DOI:10.1002/recl.19440630202

出版商:WILEY‐VCH Verlag    

年代:1944

数据来源: WILEY

摘要:

AbstractNaBiS2and KBiS2both have the NaCl structure with Bi3+and Na+(resp. K+) in averaged structure. The cell dimensions are 5.76 Å for NaBiS2and 6.01 Å for KBiS2. The ionic radius of Bi3+is discusse

ISSN:0165-0513    

DOI:10.1002/recl.19440630203

出版商:WILEY‐VCH Verlag    

年代:1944

数据来源: WILEY

摘要:

AbstractPendant la maturation de l'herbe, il s'effectue une diminution marquée de la teneur en acides gras de la matière sèche, tandis que le degré de non‐saturation de ces acides ne baisse que légèrement. Pendant le séchage artificiel de l'herbe et la conservation de l'herbe séchée, il se produit une destruction modérée des acides gras non saturés. Pendant le fanage et la conservation du foin, il se produit une destruction plus importante de ces acides. Toutes ces données sont parfaitement en accord avec l'hypothèse que la teneur en acide oléique de la graisse du beurre dépend en premier lieu des acides gras non satu

ISSN:0165-0513    

DOI:10.1002/recl.19440630204

出版商:WILEY‐VCH Verlag    

年代:1944

数据来源: WILEY

摘要:

AbstractNH4CN crystallizes in a tetragonal structure. Cell dimensions: a = 4.16,c = 7.61 Å. space group:D104h‐P4/mcm. The atomic positions are given on p. 40, on which also a figure is seen showing the structure. This bears much resemblance to the CsCl‐structure of the other NH4‐halides. (The cell is doubled in the direction of the c‐axis by the orientation of the CN‐groups.The CN‐groups oscillate in the planes (110) and (1¯10), respectively. This follows from the fact, that at room temperature intensity calculation of reflections with large third index, as compared with neighbouring reflections with small third index, give much too high results, the addition of an anisotropic heat factor yielding agreement between observed and calculated intensities both at room and low temperatures. The fact that the c‐axis increases considerably with temperature points to the

ISSN:0165-0513    

DOI:10.1002/recl.19440630205

出版商:WILEY‐VCH Verlag    

年代:1944

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19440630201

出版商:WILEY‐VCH Verlag    

年代:1944

数据来源: WILEY