The role of the "Thiodendron" consortium in postulating the karyomastigont chimaera of the endosymbiosis theory by Lynn Margulis.

The endosymbiosis theory of the origin of eukaryotic cell was first proposed more than a hundred years ago. In the second half of the 20th century, Lynn Margulis suggested a new interpretation of the origin of the nucleus in modern eukaryotes. The background was the study of the consortium "Thiodendron", a symbiotic bacterial community, which includes anaerobic aerotolerant motile spirochaetes and sulfidogenic bacteria (sulfidogens) of vibrioid form with a fermentation type of metabolism.

Description of sp. nov. and reclassification of as gen. nov., comb. nov.

A novel obligately anaerobic spirochete strain K2 was isolated from bottom marine sediments at Crater Bay of Yankicha Island (Kuril Islands, Russia). Strain K2 had helical shape and Gram-negatively stained. The optimal growth conditions were as follows: the optimum temperature was 28-30 °C with range 5-34 °C; optimal pH at 7.

Complete Genome Sequences and Methylome Analysis of Two Environmental .

Here, we report the finished closed genomes of two environmental bacteria, K2 and P (formally known as P). In addition, we provide methylation data and the associated enzymes predicted and confirmed to be responsible for each modified motif.

Complete Genome Sequence and Methylome Analysis of Sphaerotilus natans subsp. D-507.

subsp. D-507 is an environmental isolate from a sulfate spring in the northern Caucasus region of Russia. This heterotrophic bacterium is involved in the oxidation of reduced sulfur derivatives.

Stereochemical Effects on Platinum Acetylide Two-Photon Chromophores.

A series of -platinum(II) acetylide complexes containing two-photon-absorbing chromophores have been synthesized and characterized to explore the effects of stereochemistry on the nonlinear absorption properties. The molecules feature 4-(phenylethynyl)phenylethynylene (PE2), diphenylaminofluorene (DPAF), and benzothiazolylfluorene (BTF) ligands. The photophysical properties were investigated under one- and two-photon conditions and compared to the known analogues via UV-visible absorption, photoluminescence, femtosecond and nanosecond transient absorption (TA), nanosecond z-scan, and femtosecond two-photon absorption (2PA).