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Search Results: 1 - 10 of 4719 matches for " LUZ; DELLE MONACHE "
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BENZODIHYDROFURANS IN THE RESINOUS EXUDATE FROM DIPLOSTEPHIUM CINEREUM
ALEJANDRO URZúA,RENé TORRES,LUZ ANDRADE,GIULIANO DELLE MONACHE
Boletín de la Sociedad Chilena de Química , 2001,
Abstract: Two new benzodihydrofurans have been isolated from the resinous exudate of Diplostephium cinereum. Their structures were elucidated by high-resolution spectroscopic methods as 13-(2-methylpropanoyloxy)toxol (2) and 13-[(R)-3-hydroxy-3-phenylpropanoyloxy]toxol (3) Del exudado resinoso de Diplostephium cinereum, se han aislado dos benzodihidrofuranos. Sus estructuras fueron determinadas por espectroscopía de alta resolución como: 13-(2-metilpropanoiloxi)toxol (2) y 13[(R)-3-hidroxi-3-fenilpropanoiloxi]toxol (3)
BENZODIHYDROFURANS IN THE RESINOUS EXUDATE FROM DIPLOSTEPHIUM CINEREUM
URZúA,ALEJANDRO; TORRES,RENé; ANDRADE,LUZ; DELLE MONACHE,GIULIANO; DELLE MONACHE,FRANCO; BRIANSó,JOSé LUIS; SANCHEZ-FERRANDO,FRANCISCO; PARELLA,TEODOR;
Boletín de la Sociedad Chilena de Química , 2001, DOI: 10.4067/S0366-16442001000100012
Abstract: two new benzodihydrofurans have been isolated from the resinous exudate of diplostephium cinereum. their structures were elucidated by high-resolution spectroscopic methods as 13-(2-methylpropanoyloxy)toxol (2) and 13-[(r)-3-hydroxy-3-phenylpropanoyloxy]toxol (3)
Nemorosonol B, A polyisoprenylated alkyl-aryl-ketone from clusia nemorosa
Franco Delle Monache
Bulletin of the Chemical Society of Ethiopia , 1990,
Abstract: Bull. Chem. Soc. Ethiop., 4(l), 67-69 (1990).
Nemorosonol B, A polyisoprenylated alkyl-aryl-ketone from clusia nemorosa
Franco Delle Monache
Bulletin of the Chemical Society of Ethiopia , 1990,
Abstract: Bull. Chem. Soc. Ethiop., 4(l), 67-69 (1990).
Catching What We Can't See: Manual Interception of Occluded Fly-Ball Trajectories
Gianfranco Bosco, Sergio Delle Monache, Francesco Lacquaniti
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0049381
Abstract: Control of interceptive actions may involve fine interplay between feedback-based and predictive mechanisms. These processes rely heavily on target motion information available when the target is visible. However, short-term visual memory signals as well as implicit knowledge about the environment may also contribute to elaborate a predictive representation of the target trajectory, especially when visual feedback is partially unavailable because other objects occlude the visual target. To determine how different processes and information sources are integrated in the control of the interceptive action, we manipulated a computer-generated visual environment representing a baseball game. Twenty-four subjects intercepted fly-ball trajectories by moving a mouse cursor and by indicating the interception with a button press. In two separate sessions, fly-ball trajectories were either fully visible or occluded for 750, 1000 or 1250 ms before ball landing. Natural ball motion was perturbed during the descending trajectory with effects of either weightlessness (0 g) or increased gravity (2 g) at times such that, for occluded trajectories, 500 ms of perturbed motion were visible before ball disappearance. To examine the contribution of previous visual experience with the perturbed trajectories to the interception of invisible targets, the order of visible and occluded sessions was permuted among subjects. Under these experimental conditions, we showed that, with fully visible targets, subjects combined servo-control and predictive strategies. Instead, when intercepting occluded targets, subjects relied mostly on predictive mechanisms based, however, on different type of information depending on previous visual experience. In fact, subjects without prior experience of the perturbed trajectories showed interceptive errors consistent with predictive estimates of the ball trajectory based on a-priori knowledge of gravity. Conversely, the interceptive responses of subjects previously exposed to fully visible trajectories were compatible with the fact that implicit knowledge of the perturbed motion was also taken into account for the extrapolation of occluded trajectories.
Divergioic Acid, a Triterpene from Vochysia divergens
Hess, Sonia C.;Monache, Franco Delle;
Journal of the Brazilian Chemical Society , 1999, DOI: 10.1590/S0103-50531999000200005
Abstract: a new lupane triterpene, divergioic acid, has been isolated from the stem bark of vochysia divergens together with b-sitosterol, betulinic, sericic and 24-hydroxytormentic acids and the (28 ? 1) b-d-glucopyranosyl ester of the latter. the structure of divergioic acid was elucidated by spectroscopic techniques and characterized as 2a,3b,6b-trihydroxy-lup-20(29)-en-28-oic acid.
Divergioic Acid, a Triterpene from Vochysia divergens
Hess Sonia C.,Monache Franco Delle
Journal of the Brazilian Chemical Society , 1999,
Abstract: A new lupane triterpene, divergioic acid, has been isolated from the stem bark of Vochysia divergens together with beta-sitosterol, betulinic, sericic and 24-hydroxytormentic acids and the (28 -> 1) beta-D-glucopyranosyl ester of the latter. The structure of divergioic acid was elucidated by spectroscopic techniques and characterized as 2alpha,3beta,6beta-trihydroxy-lup-20(29)-en-28-oic acid.
New vismiones from psorospermum tenuifolium
Giuliano Delle Monache, Bruno Botta, James U. Oguakwa, Franco Delle Monache
Bulletin of the Chemical Society of Ethiopia , 1987,
Abstract: Bu11.Chem.Soc.Ethiop., 1(1), 42-46 (1987).
New vismiones from psorospermum tenuifolium
Giuliano Delle Monache,Bruno Botta,James U. Oguakwa,Franco Delle Monache
Bulletin of the Chemical Society of Ethiopia , 1987,
Abstract: Bu11.Chem.Soc.Ethiop., 1(1), 42-46 (1987).
Tetranortriterpenoids and Dihydrocinnamic Acid Derivatives from Hortia colombiana
Suarez, Luis E. Cuca;Menichini, Francesco;Monache, Franco Delle;
Journal of the Brazilian Chemical Society , 2002, DOI: 10.1590/S0103-50532002000300008
Abstract: a novel tetranortriterpenoid and two dihydrocinnamic acid derivatives were obtained from the wood of hortia colombiana. their structures were elucidated by detailed nmr investigations and the relative configurations established by difference noe experiments. in addition, alloxanthoxyletin, nerolidol, epoxynerolidol, three known dihydrocinnamic acid derivatives and two amides were isolated. detailed analysis of nmr data of hortiolide a, whose structure was previosly established by x ray, are also provided.
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