Synthesis of New Silylated and N-Si-N bridged Urea Derivatives from Aminosilanes and Diisocyanates.

Urea derivatives of the general motifs R(N(SiMe)C(O)NRR) and [R(NC(O)NRR)SiMe] (R=difunctional organic linker, i. e., core of diisocyanate used; R,R= H,Pr; H,Ph; Et,Et) were synthesized by insertion of four different diisocyanates (1,6-HMDI, 2,4-TDI, 1,3-TMXDI and 4,4'-MDI) into aminotrimethylsilanes MeSiNRR and diaminodimethylsilanes MeSi(NRR).

CO Capture with Silylated Ethanolamines and Piperazines.

Amine treatment is commonly used to capture CO from exhaust gases and from ambient air. The Si-N bond in aminosilanes is capable of reacting with CO more readily than amines. In the current study we have synthesized trimethylsilylated ethanolamines, diethanolamines and piperazines and investigated their reaction toward CO.

CO Capture with Silylated Ethanolamines and Piperazines.

Invited for this month's cover is the group of Marcus Herbig from the TU Bergakademie in Freiberg. The cover picture shows the reaction of CO with a silyl derivative of the biogenic amine ethanolamine. The role of CO as a contributor to climate change makes "carbon capture" a desirable goal.

Borrelia persica Infection in Immunocompetent Mice--A New Tool to Study the Infection Kinetics In Vivo.

Borrelia persica, a bacterium transmitted by the soft tick Ornithodoros tholozani, causes tick-borne relapsing fever in humans in the Middle East, Central Asia and the Indian peninsula. Immunocompetent C3H/HeOuJ mice were infected intradermally with B. persica at varying doses: 1 x 10(6), 1 x 10(4), 1 x 10(2) and 4 x 10(0) spirochetes/mouse.

Borrelia persica: In vitro cultivation and characterization via conventional PCR and multilocus sequence analysis of two strains isolated from a cat and ticks from Israel.

Borrelia persica, one of the pathogenic agents of tick-borne relapsing fever, is transmitted by the soft tick Ornithodoros tholozani. It causes infections in humans as well as in animals. In this study, we developed a medium, termed Pettenkofer/LMU Bp, for reliable in vitro cultivation.