Search results for "TAU"

In dicta ecclesia omni die fit maramma et non est pecunia. Restauri e penuria di fondi nella cattedrale di Agrigento tra il XII e il XV secolo, in La…

2010

Nel Trecento le famiglie nobiliari, mercantili e notarili di Agrigento e, in primo luogo, i Chiaromonte ebbero un ruolo fondamentale nella committenza degli affreschi della Cattedrale, attorno alla quale si sviluppò un vivace agglomerato urbano. Le uniche notizie certe sui responsabili della "maramma" della Cattedrale risalgono alla prima metà del Quattrocento, quando fu procuratore Salvatore de Palmerio, ricco e discusso esponente di una nota famiglia del ceto cavalleresco originaria di Naro.

Volatile constituents of aerial parts of three endemic Centaurea species from Turkey: Centaurea amanicola Hub.-Mor., Centaurea consanguinea DC. and C…

2008

The volatile constituents of the aerial parts of Centaurea amanicola Hub.-Mor., Centaurea consanguinea DC. and Centaurea ptosimopappa Hayek were extracted by hydrodistillation and analysed by GC and GC-MS. Altogether 94 components were identified. Sesquiterpenoids, fatty acids and carbonylic compounds were the most abundant components in the oils. Hexadecanoic acid and (Z,Z )-9,12-octadecadienoic acid were the main fatty acids in all the examined samples, that showed different patterns of composition. The study on the biological activity of the oils showed an action mainly against the Gram-positive pathogens.

Volatile components of Centaurea bracteata and C. pannonica subsp. pannonica growing wild in Croatia.

2010

This paper reports on the volatile components of oils from the aerial parts (CBA) and roots (CBR) of Centaurea bracteata Scop. and aerial parts of C. pannonica (Heuffel) Simonkai subsp. pannonica (CPA), two Asteraceae growing wild in Croatia. The volatile components, obtained by hydrodistillation, were determined by GC-MS analysis. The yields (w/w) of the dried oils were 0.10% (CBA), 0.22% (CBR) and 0.09% (CPA), respectively. A total of 91 compounds were identified accounting for 91.1%, 93.3% and 87.9% of the total oil for CBA, CBR and CPA, respectively. All the samples were characterized mainly by hydrocarbons (7.1-34.1%), fatty acids (9.7-45.9%), and oxygenated sesquiterpenes (15.2-16.6%)…

Chemical composition of the essential oils of Centaurea formanekii and Centaurea orphanidea ssp. thessala, two Centaurea species growing wild in Gree…

2012

The volatile constituents of the aerial parts of Centaurea formanekii Halacsy and the aerial parts, capitula and roots of C. orphanidea Heldr. & Sart. ex Boiss. ssp. thessala (Hausskn.) Dostál from Greece were extracted by hydrodistillation and analyzed. The main components in C. formanekii were hexadecanoic acid (13.6%), δ-elemene (9.1%), and spathulenol (6.9%). The main components in C. orphanidea ssp. thessala were γ-elemene (26.1%) and caryophyllene oxide (13.2%) in the aerial parts, hexadecanoic acid (33.5%) and heptacosane (6.3%) in the capitula, and hexadecanoic acid methyl ester (22.0%) and α-chamigrene (14.0%) in the roots. The chemotaxonomic significance with respect to other …

Guaianolides from the aerial parts of Centaurea hololeuca

2006

Seven guaianolides were isolated from the acetone extract of the aerial parts of Centaurea hololeuca Boiss. The antifeedant activity of the natural compounds (1-7) and of four chloro derivatives (8-11), synthesized from repin (1) and janerin (3) were tested against larvae of Spodoptera littoralis. Cebellin J (6) and chlorojanerin (11) showed significant antifeedant activity at 100 ppm, whereas at this concentration cebellin G (4) and 15-deschloro-15- hydroxychlorojanerin (7) stimulated feeding. Cebellin G (4) stimulated larvae of S. littoralis to feed at low concentration, but deterred feeding at high concentrations. The addition of chlorine to repin (1) resulted in an increase in antifeeda…

Sesquiterpene lactones and other constituents of Centaurea paniculata ssp. castellana

2002

Chemical composition of the essential oil of Centaurea sicana and C. giardinae growing wild in Sicily

2008

The essential oils of Centaurea sicana (S) and C. giardinae (G) were studied by GC and GC-MS. Thirty constituents for S, representing 81.5% of the total oil, and 24 compounds for G (94.2% of the total) were identified. The oils were rich in sesquiterpenoids (47.9% for S and 54.7% for G) and hydrocarbons (25.9% for S and 31.7% for G). Germacrene D (13.3%), (E)-β-farnesene (8.3%), nonacosane (7.3%), heptacosane (6.5%) and phytol (6%) were recognized as the main constituents for S, while caryophyllene oxide (17.7%), nonacosane (14.5%), germacrene D (11.5%), caryophyllene (11.2%) and heptacosane (10.3%) were the main compounds for G.

Volatile components from aerial parts of centaurea spinosociliata seenus ssp. Cristata (Bartl.) Dostál and centaurea spinosociliata seenus ssp. spino…

2010

The paper reports on the volatile components oil from aerial parts of two Asteraceae growing wild in Croatia: Centaurea spinosociliata ssp. cristata (syn. Centaurea cristata Bartl. subsp. rabenhorstiana (Sch.Bip.) Nyman) (CSC) and C. spinosociliata ssp. spinosociliata (CSS). The volatile components were obtained by hydrodistillation from selected plants and were determined by the GC-MS system on two fused-silica capillary columns of different polarity. The oil content was 0.08 % (CSC) and 0.07 % (CSS) on a dry weight basis. Altogether 73 compounds were identified accounting for 90.8 % (CSC) and 92.8 % (CSS) of the total oil, that were characterized mainly by hydrocarbons (37.9 %; 30.4 %), s…

Chemical composition of the essential oil of the local endemics Centaurea davidovii and C. parilica (Asteraceae, sect. Lepteranthus) from Bulgaria

2014

In the present study the chemical compositions of the essential oils from aerial parts of Centaurea davidovii Urum. and C. parilica Stoj. & Stef., both endemic to Bulgaria, were evaluated by GC and GC-MS. The main components of C. davidovii were β-eudesmol (13.9%), spathulenol (13.3%), caryophyllene oxide (10.1%) and ( Z)-phytol (5.4%). The main components of C parilica were hexadecanoic acid (39.2%), ( Z, Z)-9,12-octadecadienoic acid (11.9%), caryophyllene oxide (6.8%) and spathulenol (6.6%). In order to compare the essential oils composition of these taxa and of related species a PCA analysis was carried out.

El mosaico del centauro, un eco de la antigüedad clásica en el Museo de Bellas Artes de Valencia

1992

EN EL MUSEO DE BELLAS ARTES DE VALENCIA SE CONSERVA UN MOSAICO (57 X 59 CM.) EN EL QUE SE REPRESENTA LA LUCHA ENTRE UN CENTAURO Y UN TIGRE. PROCEDE DEL LEGADO QUE DON FRANCISCO MARTINEZ BLANCH HIZO A LA REAL ACADEMIA DE SAN CARLOS DE VALENCIA EN 1835. SE TRATA DE UNA IMITACION RENACENTISTA DE UN PAVIMENTO MOSAICO DE LA VILLA DE ADRIANO EN TIVOLI, ACTUALMENTE EN EL STAATLICHE MUSEUM DE BERLIN, SI BIEN LA VERSION DE VALENCIA ELIMINA TRES DE LAS FIGURAS DEL ORIGINAL. LA MITOLOGIA GRECORROMANA PRESENTA AL CENTAURO COMO UN SER PRIMITIVO Y SALVAJE; EL SIMBOLISMO CRISTIANO LO VINCULO A LAS PASIONES DESENFRENADAS, LA VENGANZA, LA FUERZA BRUTA Y EL ADULTERIO, SIENDO LOS BESTIARIOS MEDIEVALES LOS QUE…