The chemical compositions of the aerial parts essential oils of Chamaemelum mixtum (L.) Alloni from Corsica and Sardinia were investigated employing gas chromatography and gas chromatography-mass spectrometry (GC-MS). The structure of (Z)-heptadeca-9,16-dien-7-one, a natural compound not previously described, was elucidated by GC-MS (electron impact and chemical ionization) and one-dimensiona...

Dendronobilins K - N, four new sesquiterpenes with copacamphane-type (1), picrotoxane-type (2, 3) and cyclocopacamphane-type (4) skeletons, were isolated from the n-BuOH soluble fraction of the 60% ethanol extract of the stems of Dendrobium nobile. Their structures were established as 2beta,11,12-trihydroxycopacamphan-15-one (1), (2beta,3beta,4beta,5beta)-2,4,11,12-tetrahydroxypicrotoxan-3(15)-...

Robin Foà,1 Antonella Vitale,1 Marco Vignetti,2 Giovanna Meloni,1 Anna Guarini,1 Maria Stefania De Propris,1 Loredana Elia,1 Francesca Paoloni,2 Paola Fazi,2 Giuseppe Cimino,1 Francesco Nobile,3 Felicetto Ferrara,4 Carlo Castagnola,5 Simona Sica,6 Pietro Leoni,7 Eliana Zuffa,8 Claudio Fozza,9 Mario Luppi,10 Anna Candoni,11 Ilaria Iacobucci,12 Simona Soverini,12 Franco Mandelli,13 Giovanni Marti...

In this paper we propose and analyze a stochastic collocation method for solving the second order wave equation with a random wave speed and subjected to deterministic boundary and initial conditions. The speed is piecewise smooth in the physical space and depends on a finite number of random variables. The numerical scheme consists of a finite difference or finite element method in the physica...