Microbiological efficiency of the combinations of two carbapenems against antibiotic resistant Klebsiella pneumoniae strains.

Combined antibiotic therapy is widely used for infections caused by carbapenem-resistant K. pneumoniae. The objective of this work was to identify the synergistic activity of combinations of two carbapenems against multidrug- and extensively drug-resistant K.

Variability of the biological activity of oxidized titanium implants.

Oxidized titanium is a biologically inert material, but bioinertness reduces biomechanical characteristics of titanium implants. Modification of the structure of oxide surface layer of BT 5-1 titanium by increasing its thickness (by 1.7 times) and pore diameter (by 1.

Unexpected Splitting of ansa-Ytterboacene and ansa-Calcoacene: Formation of [(η -C H )ZrCl (thf) ] and (Me Si) C H.

A ligand-splitting transmetalation: The ansa-metalloacenes [(η -C H ) M(thf) ] (M=Yb, Ca) react with ZrCl or Me SiCl unexpectedly by splitting the ansa-bisacenyl ligand, leading to the formation of the zirconacycle [(η -C H )ZrCl (thf) ] (1) [Eq. (1)] and the 1,2-bistrimethylsilylacenaphthene (Me Si)C H , respectively.

Synthesis and Structure of the First Lanthanide Complex with the Bridging, Antiaromatic 2,2'-Bipyridine Dianion:

The two-electron reduction of 2,2'-bipyridine with naphthaleneytterbium resulted in the formation of the ytterbium complex [{Yb(µ(2)-bipy)(thf)(2)}(3)] (see picture) in which antiaromatic 2,2'-bipyridine dianions bridge the ytterbium atoms in a novel µ(2)-eta(2):eta(4) fashion.