Isolation and GC/MS quantitative determination of ursolic acid in the herb of Nepeta cataria var. citriodora have been performed. The content of this compound was in the range 0.95 ñ 1.30%. Daucosterol (βsitosterol 3-O-β-D-glucoside) was also isolated from the plant, in addition to small amounts of β-sitosterol, campesterol, α-amyrin and β-amyrin. The content and composition of essential oil in...

interpretation, introduced in the late 1970’s [24] by P. Cousot and R. Cousot, is a framework of semantics approximation. We briefly review the major terminology of this theory. Informally, abstract interpretation aims to construct two different meanings for a programming language where the first gives the usual meaning of programs in the language, and the second can be used to answer certain q...

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Àííîòàöèÿ Ðàññìîòðåíà çàäà÷à Time-Dependent Shortest-Path, ðàñøèðåíèå çàäà÷è î êðàò÷àéøåì ïóòè â ãðàôå, êîãäà âåñ äóãè ãðàôà ÿâëÿåòñÿ ôóíêöèåé îò âðåìåíè îòïðàâëåíèÿ èç íà÷àëüíîé âåðøèíû ýòîé äóãè. Òàêîé ãðàô íàçûâàþò íåñòàöèîíàðíîé ñåòüþ. Ïðåäëîæåíà ìîäèôèêàöèÿ àëãîðèòìà ALT (A* with Landmarks & Triangle), îñóùåñòâëÿþùàÿ öåëåíàïðàâëåííûé ïîèñê ïóòè â íåñòàöèîíàðíîé ñåòè ïî îðèåíòèðàì. Îðèåíòèð...

In this work we prove that the set of points at infinity S8 :“ ClRPm pSqXH8 of a semialgebraic set S Ă R that is the image of a polynomial map f : R Ñ R is connected. This result is no longer true in general if f is a regular map. However, it still works for a large family of regular maps that we call quasi-polynomial maps.

Let V n be an open manifold of non-negative sectional curvature with a soul Σ of co-dimension two. The universal cover Ñ of the unit normal bundle N of the soul in such a manifold is isometric to the direct productM×R. In the study of the metric structure of V n an important role plays the vector field X which belongs to the projection of the vertical planes distribution of the Riemannian subme...

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The Ginzburg-Landau equation ∂tu = ∂ 2 xu+u−|u|u on the real line has spatially periodic steady states of the the form Uη,β(x) = √ 1−η2 ei(ηx+β), with |η| ≤ 1 and β ∈ R. For η+, η−∈(− 1 3 , 1 √ 3 ), β+, β−∈R, we construct solutions which converge for all t > 0 to the limiting pattern Uη±,β± as x → ±∞. These solutions are stable with respect to sufficiently small H2 perturbations, and behave asy...