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作者:O. V. Karpenko , V. I. Kravets’ , O. M. Stanzhyts’kyi
来源:[J].Ukrainian Mathematical Journal(IF 0.154), 2013, Vol.65 (2), pp.249-259Springer
摘要:We establish conditions required for the oscillation behavior of solutions of linear functional-difference equations and discrete linear difference equations of the second order in the case where the corresponding solutions of their differential analogs are oscillating on a segme...
作者:O. M. Antypenko , S. I. Kovalenko , O. V. Karpenko
来源:[J].Synthetic Communications(IF 1.06), 2016, Vol.46 (6), pp.551-555Taylor & Francis
摘要:ABSTRACT(#br)A series of tetrazolo[1,5- c ]quinazolines were synthesized by [4 + 1]-cyclocondensation of 4-hydrazinoquinazolines with sodium nitrite with good yields. Peculiarities of this reaction were discussed, namely, the influence of halogen on the reaction yield. Hydrolytic...
作者:O. V. Karpenko , B. O. Priimenko
来源:[J].Journal of Heterocyclic Chemistry(IF 1.224), 2018, Vol.55 (4), pp.1033-1041Wiley
摘要:Synthesis of 1‐methyl‐6‐((2‐(aryl‐(heteryl‐))‐2‐oxoethyl) pteridine‐2,4,7(1 H ,3 H ,8 H )‐triones via [4 + 2]‐cycloaddition of 1‐methyl‐5,6‐diaminouracil with ethyl 4‐aryl(heteryl)‐2,4‐dioxobutanoates is described in presented work. It was estab...
作者:O. V. Karpenko , S. A. Kornii ...
来源:[J].Materials Science(IF 0.214), 2016, Vol.51 (5), pp.618-626Springer
摘要:The problem of inhibition of the corrosion of D16T aluminum alloy by surface-active products obtained as a result of the biosynthesis of Pseudomonas sp. PS-17 strain (rhamnolipid biocomplex) is studied by using the electrochemical and quantum-chemical methods. It is shown th...
作者:... V. I. Baranov , V. P. Novikov , O. V. Karpenko
来源:[J].Biotechnologia Acta, 2015, Vol.8 (5), pp.71-77DOAJ
摘要:The aim of the work was to study the influence of rhamnolipid biocomplex and ethylthiosulfanilate on field pea and sorghum plants when growing in petroleum contaminated soil. Plant seeds were treated with solutions of rhamnolipid biocomplex or ethylthiosulfanilate (0.01 g/l)...
作者:O. V. Karpenko , N. I. Koretska ...
来源:[J].Biotechnologia Acta, 2013, Vol.6 (6), pp.94-99DOAJ
摘要:The effect of biogenic surfactants which were synthesized by the culture Pseudomonas sp. PS-17, particularly rhamnolipid biocomplex, on the growth of cereal plants — wheat and barley in the early stages of vegetation, as well as its effect on the activity of indole-3-acetic ...

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