We study the duality between M-theory compactified on Calabi-Yau fourfolds and the heterotic string compactified on Calabi-Yau threefolds times a circle. Our analysis is based on a comparison of the low energy effective actions in three dimensions. Non-perturbative N=1 vacua of the heterotic string in D=4 are of particular interest due to their phenomenological prospects [1]. A certain class of...

which is a nonalgebraic integral of the system (1; 1, 0). This conclusion contradicts the fact of Fo being an algebraic function, therefore the initial hypothesis that assumes F to be dependent upon x3 and y3 is absurd. F being independent of x3 and y3, it follows, as initially said, that any algebraic integral of the system (1; 1, 1) is an algebraic combination of the four integrals (12; 1,1),...

Lateral diffusion of GFP-tagged H2Ld molecules in the ER membrane reports on their interaction with the TAP complex during synthesis and peptide loading. Peptide-loaded H2Ld molecules diffuse rapidly, near the theoretical limit for proteins in a bilayer. However, these molecules are retained in the ER for some time after assembly. H2Ld molecules, associated with the TAP complex, diffuse slowly,...

aromatic hydrocarbons, are of interest not only from fundamental viewpoints, but also from applied ones, such as physiological activities and advanced materials. Benz[a]azulene and its derivatives, formed by condensation of a benzene ring with an azulene ring, are also interesting compounds. During the course of our work on the reaction of o-[2-furyl]cycloheptatrienylbenzene and triphenylmethyl...

We report here kinetic and thermodynamic studies on differential isomerization of intramolecular Pyr*Pur.Pyr triplexes in supercoiled plasmids. Two structural isomers of the triplex exist: one with the 3'-half of the Pyr strand as the third strand (H-y3 form) and the other with the 5'-half as the third strand (H-y5 form). The relative populations of the two triplex isomers was determined using ...