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Effect of Toxic Industrial Pollutants on the Activity and Isoforms of Acid DNase in the Freshwater Snail Viviparus viviparusL.
      
A preparation of lysozyme from a freshwater bivalve, Unio pictorum, has been isolated by sorption to chitin, and its physicochemical properties have been studied.
      
Respiration Rate and Species-Specific Lifespan in Freshwater Bivalves of Margaritiferidae and Unionidae Families
      
We studied changes in the respiration rate in five species of freshwater bivalves as a function of animal age and size.
      
The longest and shortest lifespan among the studied mollusks was specific for the pearl mussel Margaritifera margaritifera(Ru= 37 kJ and T20= 36 years) and the freshwater mussel Anodonta anatina(Ru= 8 kJ and T20= 8 years), respectively.
      
Study of Freshwater Bodies in Asiatic Part of Russia and Uzbekistan
      
Ecologically tolerable levels (ETL) of environmental factors have been determined for freshwater ecosystems in Asiatic part of Russia and neighboring countries (basins of Ob, Yenisei, Lena, Amur, and Syr-Darya rivers).
      
Biological, Hydrochemical, and Hydrological Data on Freshwater in Russia and Neighboring Countries for Constructing a Computeriz
      
Causes of Technogenic Changes in a Freshwater Zooplanktonic Community
      
Morphological, behavioral, physiological, and biochemical adaptations of marine and freshwater mollusks favoring their survival in conditions of drying were reviewed.
      
A unique case is analyzed when the accelerated senescence program (progeria) in salmon (Salmonidae) can be canceled by larval parasite of the gills-freshwater pearl mussel Margaritifera margaritifera.
      
The accelerated senescence program was successfully canceled in holarctic stickleback Gasterosteus aculeatus by crossing the marine and freshwater forms in ponds and selection of hybrids.
      
Intracellular Symbiosis and Energetic Role of Bacteria in Gill Epithelium of Freshwater Mollusks and Fishes
      
Penetration of bacteria by endocytosis into gill epithelial cells has been revealed in animals of different evolutionary levels (freshwater mollusks and fishes).
      
Technical Aspects of Using Rank Distributions of Phytoplankton Abundance for the Analysis of Mass Data of Freshwater Ecological
      
Some patterns of age and geographical variation in fecundity indices were analyzed in three freshwater fishes (river perch, bream, and Sevan khramulya).
      
Seasonal variation in the content of free reducing sugars in body fluids of freshwater mollusk Lymnaea stagnalis
      
In this context, the effect of seasonal temperature variation on the content of free reducing sugars was studied in freshwater snail Lymnaea stagnalis.
      
Variation in the content of free amino acids in body fluids of freshwater mollusk Lymnaea stagnalis during seasonal adaptation t
      
The effect of autumn and winter decrease in environmental temperature on the content of free amino acids in body fluids has been studied in freshwater snail Lymnaea stagnalis.
      
 

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