摘要:

AbstractRaoult's law for dilute solutions is derived theoretically from a model of the liquid state by the use of statistical mechanics. This method seems to be better adapted to the problem than Planck's method. It is shown that the decrease of the molecular potential of the solvent is caused by the fact that the number of configurations of the mixture contains factors originating from the solute molecules and proportional to the number of solvent molecules. When every solute molecule contributes one such factor, the mixture obeys Raoult's law in great dilution.

ISSN:0165-0513    

DOI:10.1002/recl.19410600202

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractThe paper is an introduction to a series of studies about the density and other physical properties of glasses.

ISSN:0165-0513    

DOI:10.1002/recl.19410600203

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractDie in der Literatur vorkommenden Kennzahlen des Sterculiaöls sind sehr verschieden. Diese Tatsache muss ohne Zweifel dem Umstand zugeschrieben werden, dass es zwei Sterculiaöle gibt, nämlich das Kernöl (Cotyledonenöl) und das Fruchtfleischöl (Mesocarpöl), welche in vielen Fällen nicht getrennt gewonnen werden. Ihre Zusammensetzung aber ist sehr verschieden, sodass für die richtige Kenntnis der Eigenschaften der beiden Öle eine getrennte Herstellung und Untersuchung erw

ISSN:0165-0513    

DOI:10.1002/recl.19410600204

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractBy means of the determination of the true densities in helium and the apparent densities in air, hydrogen, benzene and water of some samples of wool, the dyeing process of wool with acid and basic dyes and the felting process of wool are studied, and some conclusions with regard to these processes are drawn.Moreover the sorptive capacities of wool for air and hydrogen are calculated, and the nature of these sorption phenomena is discussed.

ISSN:0165-0513    

DOI:10.1002/recl.19410600205

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractIn this communication a method for the estimation of tocopherol in butter is described.

ISSN:0165-0513    

DOI:10.1002/recl.19410600206

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractDas Isanoöl enthält eine (oder mehrere) ungesättigte Hydroxysäure(n), welche zu der 9‐Hydroxystearinsäure hydrogeniert wurde(n), wie durch Wasserabspaltung und durch Ozonisierung der dabei gebildeten Octadecensäuren bewiese

ISSN:0165-0513    

DOI:10.1002/recl.19410600207

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19410600208

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractUpon shaking αβ‐diacyl‐γ‐tritylglycerols in alcoholic solution with hydrogen in the presence of palladium on active carbon as a catalyst, hydrogen is taken up and the corresponding αβ‐diglycerides together with triphenylmethane are formed. However, when platinum oxide is used as a catalyst, no hydrogenation takes place, but deacylation. For example, αβ‐dibenzoyl‐γ‐tritylglycerol can be converted quantitatively into ethyl benzoate and α‐monotritylglycerol.The same contrast between the two catalysts was observed in the case of the β‐acyl‐αγ‐benzylideneglycerols. Upon shaking these compounds in alcoholic solution with hydrogen in the presence of palladium on active carbon, hydrogen is taken up and the corresponding β‐monoglycerides are formed in addition to toluene. When platinum oxide is used as a catalyst, however, a quantitative deacylation takes place; β‐stearyl‐αγ‐benzylideneglycerol, for example, can be converted into ethyl stearate and αγ‐benzylideneglycerol.This new method of deacylation is discussed in detail. The reaction takes place at least as smoothly when the substance, in alcoholic solution, is shaken in air with platinum oxid

ISSN:0165-0513    

DOI:10.1002/recl.19410600209

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19410600210

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19410600211

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY