Analyses of the Effects of Arginine, Nicotine, Serotype and Collagen-Binding Proteins on Biofilm Development by 33 Strains of .

serotype strains comprise <3% of oral isolates of but are prominent in diseased cardiovascular (CV) tissue. Collagen binding protein (CBP) genes, and , are prevalent in serotype strains and are associated with endothelial cell invasion. Nicotine increases biofilm formation by serotype strains of , but its effects on serotype strains and strains with CBP are unknown.

Anisotropy of resistivity in hexagonal late transition metals and their alloys.

Transport properties of hexagonal transition metals Co, Ru, and Os at finite temperatures are studied by means of ab initio electronic structure techniques and the Kubo linear response theory. An alloy analogy model for a quantitative treatment of the electrical conductivities due to temperature-induced lattice vibrations (phonons) and spin fluctuations is applied with focus on anisotropy induced by the hexagonal structure. The resistivity anisotropy in Co is found opposite to that in Ru and Os, in agreement with existing experimental data.