Tumskiy Roman Sergeevich RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia 410010rome.ru@yandex.ru Author's articles The Peculiarities of Synthesis of Acid Esters of Methylphosphonic Acid Stereochemical Aspects of Reaction of 1,3-dipolar Cycloaddition in a Row of Conjugated Enones Synthesis of Spiro-fused Hydropyrimidinthiones with Use of Thiobarbituric Acid The Determination of Biological Effects of New Heterocyclic Compounds on Plants and the Evaluation of Environmental Safety of Their Application Exploration of Possibilities for Organic Selenides and Dihydroselenochromilium Salt Interaction with Diphenylpicrylhydrazyl