[Extreme Climatic Events in the Altai Republic According to Dendrochronological Data].

The results of dating of extreme climatic events by damage to the anatomical structure and missing tree rings of the Siberian larch in the upper forest boundary of the Altai Republic are given. An analysis of the spatial distribution of the revealed dates over seven plots (Kokcy, Chind, Ak-ha, Jelo, Tute, Tara, and Sukor) allowed us to distinguish the extreme events on interregional (1700, 1783, 1788, 1812, 1814, 1884), regional (1724, 1775, 1784, 1835, 1840, 1847, 1850, 1852, 1854, 1869, 1871, 1910, 1917, 1927, 1938, 1958, 1961), and local (1702, 1736, 1751, 1785, 1842, 1843,1874, 1885, 1886, 1919, 2007, and 2009) scales. It was shown that the events of an interregional scale correspond with the dates of major volcanic eruptions (Grimsvotn, Lakagigar, Etna, Awu, Tambora, Soufriere St.

[Alterations in the isozyme spectrum and the activity of lactate dehydrogenase in development of Ehrlich ascites tumor].

By means of polyacrylamide gel disc electrophoresis lactate dehydrogenase belonging only to the M-type was observed in mice liver tissue, muscles, ascite cells and ascites fluid in the course of development of Ehrlich ascites tumor. In the tissues studied and in the tumor the LDH type was not altered in the course of development of the tumor. At the same time the LDH activity was slightly decreased in muscles; in the terminal period it was increased in liver tissue; in ascitic cells or fluid it was increased in the course of development of the tumor.