[Biotransformation of nitrogen-containing compounds in the process of the continuous final purification of effluents from swine-breeding farms by immobilized cells]. / Biotransformatsiia azotsoderzhashchikh soedinenii v protsesse neprepyvnoi doochistki stokov svinokompleksov immobilizovannymi kletkami.

After their two-step purification in aeration tanks, effluents from a swine-breeding farm were subjected to final purification in a flow bioreactor with immobilized cells derived from activated sludge. The dynamics of nitrogen compounds were studied at the reactor inlet and outlet at three flow rates. The use of a simple mathematical model of the nitrogen balance allowed the rates of nitrogen assimilation-mineralization two nitrification stages, and nitrogen fixation-denitrification to be estimated. The first stage of nitrification was found to proceed intensely and produce high nitrite concentrations (up to 100 mg N/l, accounting for about half of the total N at the inlet). The second nitrification stage was inhibited, and nitrate was only produced after 3-4 weeks of continuous operation. The strategy of the final purification of effluents from nitrogen compounds is discussed on the basis of the known regulatory mechanisms of microbial activities in activated sludge.

[10-year monitoring of morbidity, mortality and lethality from myocardial infarct and stroke]. / 10-letnii monitoring zabolevaemosti, smertnosti i letal'nosti ot infarkta miokarda i mozgovogo insul'ta.

The data on the studies using WHO programs "Register of Acute Myocardial Infarction", "Register of Brain Apoplexy", "MONICA" in one of the districts of Novosibirsk have been pooled and analyzed. The studies have established objective trends in the incidence, mortality, lethality of myocardial infarction and brain apoplexy in the population aged 25-64 for 10 years.