The influence of various solvents upon the conformation of gluten proteins, glutenin and gliadin, has been studied by optical rotatory dispersion (ORD), circular dichroism (CD), and infrared (lR) absorption measurements. From ORD data an alpha-helix content of 38% has been calculated for gliadin in trifluoroethanol; 35% for glutenin. Conversely, little or no alpha-helix was found when the prote...

We study the q-Cli ord algebras Clq2(N; c ), called FRT{Cli ord algebras, introduced by Faddeev, Reshetikhin and Takhtajan. It is shown that Clq2(N; c ) acts on the q-exterior algebra (O q2 ). Moreover, explicit formulas for the embedding of Uq2(soN ) into Clq2(N; c ) and its relation to the vector and spin representations of Uq2(soN ) are given and proved. MSC 2000: 81R50, 15A66

This paper continues Nebel and Biirckert’s investigation of Allen’s interval algebra by presenting nine more maximal tractable subclasses of the algebra (provided that P # NP), in addition to their previously reported ORD-HO~PE subclass. Furthermore, twelve tractable subclasses are identified, whose maximality is not decided. Four of these can express the notion of sequentiality between interva...