Strategy and tactics of instrumental examination of patients with thoracic and thoracoabdominal aortic aneurysm.

The paper gives a detailed characterization and describes the importance of instrumental methods for examination of patients in the diagnosis of thoracic and thoracoabdominal aortic aneurysms. Provides a differentiated protocol of the examination of patients as dependent on the clinical course, disease stage and nemodynamic stability of the patient's status. Delineates the tactics of the examination of patients with acute and chronic dissection of the proximal and distal segments of the aorta as dependent on hemodynamic stability.

Regulation of the sulfate starvation response in Pseudomonas aeruginosa: role of cysteine biosynthetic intermediates.

Pseudomonas aeruginosa PAO1 grew in defined synthetic medium with any of a broad variety of single sulfur sources, including sulfate, cysteine, thiocyanate, alkanesulfonates, organosulfate esters and methionine, but not with aromatic sulfonates, thiophenols or organothiocyanates or isothiocyanates. During growth with any of these compounds except sulfate, cysteine or thiocyanate, a set of 10 sulfate starvation-induced (SSI) proteins was strongly up-regulated, as observed by two-dimensional protein electrophoresis of total cell extracts. A comparable level of up-regulation was found for the hydrolytic enzyme arylsulfatase, which has previously been used as a marker enzyme for the sulfate starvation response.

[Nitrosamine levels in the environmental air of several large cities].

Data of studies on the content of nitrosodimethylamine, nitrosodiethylamine and nitrogen oxides in the air medium of certain cities with different degrees of industrial development are presented in the paper. The dynamics of the concentrations of chemicals under study during the annual cycle is shown. A correlation between the content of those chemicals in the air medium and the main meteorological factor is established.