[The circulation of the California encephalitis complex and Batai viruses in the Lake Baikal region (serological research data)]. / O tsirkuliatsii virusov kompleksa kaliforniiskogo éntsefalita i Batai v Pribaikal'e (dannye serologicheskikh issledovanii).

The serological materials of the indigenous population and cattle suggest that there are viral foci of a complex of California encephalitis with the circulation of viruses of Inkoo, Tahyna [correction of Tyagin], and the white hare. The results of examining the residents of Irkutsk also suggest that there are urban viral foci of a complex of California encephalitis. The epidemiological potential of the natural foci of Batai virus is insignificant in the Baikal region.

[Nitrogen fixing activity of pea nodule bacteria during different phases of host plant development]. / Azotfiksiruiushchaia aktivnost' kluben'kovykh bakterii gorokha v razlichnye fazy razvitiia rasteniia-khoziaina.

The activity of nitrogenase in nodules of pea plants and the rate of diurnal nitrogen fixation were studied at different phases of the plant growth using the acetylene and isotope techniques. At the same time, the morphology of nodule bacteria was studied by electron and phase-contrast microscopy. About 90% of the bacteria in nodules were found in the form of bacteroids from the early phase of the plant growth (budding) to ripening when gemmated arthrospores could be observed on some bacteroids. The highest activity of nitrogenase and nitrogen fixation was detected at the reproductive stage of growth. Therefore, in order to obtain more active strains of pea nodule bacteria, they should be isolated from nodules at this stage of plant growth.