2021. Vol. 163, No. 2

Kitaeva K.V., Rizvanov A.A., Solovyeva V.V. Modern methods of preclinical anticancer drug screening using test systems based on cell cultures

155

Rudakova M.A., Galitskaya P.Yu., Selivanovskaya S.Yu. Biosurfactants: Current application trends

177

Shormanov V.K., Shcherbakov D.P., Garmonov S.Yu. Features of albendazole determination and dynamics of its decomposition in biological material

209

Galieva G.S., Kuryntseva P.A., Galitskaya P.Yu., Tagirov M.Sh., Selivanovskaya S.Yu. Influence of chiken manure biochar on microorganisms and plants

221

Uliakhin A.V. Variability of the dermal elements of the pectoral girdle in Platyoposaurus (Temnospondyli, Archegosauridae) from the Middle Permian of Eastern Europe

238

Yakupova D.B., Akhmedenov K.M. Kazakhstanosaurus efimovi Yakupova et Akhmedenov sp.  nov. (Ichthyosauria, Undorosauridae), a new species from the Upper Jurassic deposits of the Middle Volga region

251

Snachev A.V. The geology of carbonaceous deposits (Carboniferous) of the South Urals (Fedorovskaya sequence, Sukharysh syncline)

264

Nazarov N.N. Ancient channel network of the Keltma hollow (Kama-Vychegda watershed)

274

Shikhova T.G., Soloviev A.N. Dynamics of the borders of phenological seasons in the east of the Russian Plain (Kirov, Russia)

289

Polyakova E.V., Kutinov Y.G., Mineev A.L., Chistova Z.B., Belenovich T.Ya. Using the ASTER GDEM v.2 global digital elevation model to identify areas of possible activation of karst processes in the Arkhangelsk region  (Russia)

302