Silicate glasses are ubiquitous on terrestrial planets wherever molten rock – generated by volcanism or impacts is quenched air water. Hence, they provided ready and abundant reactive solid surfaces for prebiotic chemistry the early Earth. Here, we show that glass composition determines basicity, which in turn modulates outcome of synthetic processes such as polymerization 3’,5’ cyclic guanosin...

Previously we discovered that OmpA of Escherichia coli increases biofilm formation on polystyrene surfaces (González Barrios et al., Biotechnol Bioeng, 93:188-200, 2006a). Here we show OmpA influences biofilm formation differently on hydrophobic and hydrophilic surfaces since it represses cellulose production which is hydrophilic. OmpA increased biofilm formation on polystyrene, polypropylene, ...

We propose a general paradigm for generating optimal coordinate frame fields that may be exploited to annotate and display curves and surfaces. Parallel-transport framings, which work well for open curves, generally fail to have desirable properties for cyclic curves and for surfaces. We suggest that minimal quaternion measure provides an appropriate generalization of parallel transport. Our fu...

Let F be a polystable sheaf on smooth minimal projective surface of Kodaira dimension 0. Then the DG-Lie algebra RHom(F,F) derived endomorphisms is formal. The proof based study equivariant $L_{\infty}$ models algebras equipped with cyclic structure degree 2 which non-degenerate in cohomology, and does not rely (even for K3 surfaces) previous results same subject.

To investigate the mechanism of interaction of gramicidin S-like antimicrobial peptides with biological membranes, a series of five decameric cyclic cationic beta-sheet-beta-turn peptides with all possible combinations of aromatic D-amino acids, Cyclo(Val-Lys-Leu-D-Ar1-Pro-Val-Lys-Leu-D-Ar2-Pro) (Ar identical with Phe, Tyr, Trp), were synthesized. Conformations of these cyclic peptides were com...