摘要:

AbstractOf the seven modifications of ice that are stable at temperatures above −80°C, modification I has so far been investigated in especially great detail. An eighth modification (ice Ic)which is stable only below −80°C is alsowell known. In the following, the crystal lattice structure of these modifications and the formations of mixed crystals are disc

ISSN:0570-0833    

DOI:10.1002/anie.196205631

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractSeveral examples are used to show that the reactivity of dichloro‐ and trichloropyrimidyl dyes and the sensitivity of their dyeings to hydrolysis are determined by the nature of the bridge unit between the chromophore and the reactive system. The tendency of the dyeings to hydrolyze in acid and, more particularly, in alkaline media increases with increasing reactivity of the dyes. In alkaline media, dyeings made with dyes containing oxygen bridges are cleaved mainly between the reactive system and the chromophore, while in dyeings made with dyes containing imino or methylimino bridges, the linkage between the reactive system and the cellulose is hydrolyze

ISSN:0570-0833    

DOI:10.1002/anie.196205681

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractStriking differences are observed when the sugar components of digitaloid lactones ( as well as of two additional minor groups of substances) are compared with those of the other glycosides in higher plants: non‐digitaloid glycosides almost always contain one or more of the following eight sugars as a structural unit: D‐glucose, D‐glucuronic acid, D‐xylose, L‐arabinose, D‐galactose, D‐galacturonic acid, L‐fucose, and L‐rhamnose. Oligosaccharide moieties almost always contain hexoses “on the inside”. i.e. linked directly onto the aglycone, and pentoses and methyl pentoses “on the outside”. Oligosaccharide moieties containing more than two sugars often appears to be branched. Cardioactive glycosides ( and two related minor groups of substances) chiefly contain only two sugars of the eight listed, viz. D‐glucose and L‐rhamnose. Very often numerous other sugars are found, particularly hexamethyloses. Oligosaccharide moieties always contain the hexose (D‐glucose) “on the outside”. As far as is known, oligosaccharide moieties with more than two

ISSN:0570-0833    

DOI:10.1002/anie.196205721

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractA method was developed for continuous automatic measurement of the radioactivity distribution of weak β‐emitters on open columns, for example, thin‐layer chromatograms. It may be used for analytical separations, as well as for preparative separations on a semi‐micro scale. During the measurements the substances are not contaminated by addition of other mat

ISSN:0570-0833    

DOI:10.1002/anie.196205801

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

摘要:

AbstractIndustrial anode materials should show small tendency to corrode in order to have a long life and, from energy considerations, should give low anodic overvoltages. The maximum corrosion in the active state in the presence and absence of complex formation is discussed of porous outer films of more difficulty soluble corrosion products. Corrosion in the passive state is treated as a property of the nonporous passive layer; several examples are presented, and the Flade potential for transitions from the active to the passive state and its properties are discussed. The influence of pH and complexing agents on passive corrosion is treated. Anode processes or, as treated here, redox processes such as the evolution of oxygen or chlorine can take place at passive electrodes only if the passive film has a sufficiently high electron conductivity. This is not the case with films on aluminum, titanium, and tantalum, for example. The overvoltage on passive anodes is a property of the passive film at the electrolyte side of the phase boundary. – Semiconducting materials and graphite as anode materials are discussed separatel

ISSN:0570-0833    

DOI:10.1002/anie.196205831

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196205901

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196205911

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196205922

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196205932

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY

ISSN:0570-0833    

DOI:10.1002/anie.196205942

出版商:Hüthig&Wepf Verlag    

年代:1962

数据来源: WILEY