Discovery of a very Lyman-α-luminous quasar at z = 6.62.

Distant luminous quasars provide important information on the growth of the first supermassive black holes, their host galaxies and the epoch of reionization. The identification of quasars is usually performed through detection of their Lyman-α line redshifted to 0.9 microns at z > 6.

[Indication of mycoplasmas in the synovial fluid of rheumatoid arthritis patients].

Specimens of synovial fluid taken from patients with rheumatoid arthritis were tested for the presence of mycoplasmas and mycoplasmic antigens. In 30% of cases the direct inoculation into cell-free media permitted the detection of mycoplasma-like agents which could not be subcultured on solid media for identification. Mycoplasmic antigens were detected in the tested material with the same frequency by means of the immunofluorescence test.

[Ultrastructure of the L forms of meningococcus].

The authors carried out an electron microscope study of the ultrastructure of the L-form of meningococcus. Several types of cells differing by shape, size, and electron density were revealed. Sharply angular cells closely adjacent to one another prevailed in the culture.

[In vitro obtaining stable L forms of group A beta-hemolytic streptococci type 1 and 12].

Stable L-forms of hemolytic streptococcus of group A of the 1st and 12th types were obtained in vitro under the effect of penicillin. L-form strains were passaged over 40 times and failed to reverse to the initial. Stability of the obtained L-cultures of the 1st and 12th types was confirmed by electron microscopy which showed the absence of cell wall in them.