Search results for " aste"
showing 10 items of 125 documents
Asteroceras langi Dommergues & Meister, un hommage au Professeur J. Lang.
2007
4 pages; Une espèce d'ammonite du Sinémurien supérieur du Maroc, Asteroceras langi Dommergues & Meister, dédiée au professeur J. Lang est présentée à nouveau à l'occasion de ce mémoire jubilé.
Phytochemical analysis ofAchillea ligusticaAll. from Lipari Island (Aeolian Islands)
2016
A complete chemical investigation of Achillea ligustica All. growing at Lipari (Aeolian Island, Sicily) has been carried out. Seventeen metabolites have been isolated and characterised from dichloromethane and methanol extracts of flowers and aerial parts, and GC/MS analyses of petroleum ether extracts was carried out, revealing a composition in sesquiterpenoids similar to those reported for populations from Greece, Sicily and Algeria, showing the presence of (3RS,6RS)-2,6-dimethyl-1,7-octadiene-3,6-diol (1), 2,6-dimethyl-octa-3(E),7-diene-2,6-diol (2), iso-seco-tanapartholide (3) from DCM fraction. In addition from the methanolic extract of the aerial parts, peculiar flavonoid glucuronides…
Zvaigžņotā Debess: 2008, Pavasaris
2008
Latvijas Zinātņu akadēmija, Latvijas Universitāte
Zvaigžņotā Debess: 2016, Vasara (232)
2016
Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: A.Balklavs. New Studies and Conclusions on Nucleus of the Galaxy (abridged) ; U.Dzērvītis. Discussion on Planetary System of Barnard’s Star Continues (abridged) ; M.Eliāss. Meeting of Solar Radio Radiation Section (abridged) ; DEVELOPMENTS in SCIENCE: O.Dumbrājs. Neutrino Oscillations: from the Outset to the Nobel Prize ; R.Misa. Conversation with Andris Ambainis on Quantum Computing Science ; DISCOVERIES: F.Gahbauer. First Direct Detection of Gravitational Waves ; I.Pundure. ATLASGAL Survey of Milky Way Completed ; SPACE RESEARCH and EXPLORATION: J.Jaunbergs. The Story of Pluto’s Satellites ; K.Schwartz. Conducting Ice and Magnetic Field of Ur…
Il «Novus Avianus Astensis»
2006
Sono apparse nell’ultimo decennio le edizioni critiche del Novus Avianus del cosiddetto Astensis poeta, ignoto poeta italiano, originario di Asti che nell’XI secolo rielaborò le favole avianee sottoponendole ad una ponderata amplificatio e ridistribuendole, secondo l’argomento, in tre libri. Lo studio indaga le caratteristiche di questa produzione favolistica, studiando i modi di rimaneggiamento delle favole avianee sperimenate dai singoli rielaboratori mediolatini.
A guided online ACT intervention may increase psychological well-being and support school engagement in adolescents
2023
Objective The aim of the present study was to investigate the extent to which initial levels and changes in ninth-grade adolescents' (n = 243) psychological well-being were associated with their school engagement after the transition to upper secondary education. In addition, we investigated whether a brief guided online acceptance and commitment therapy (ACT) intervention program delivered during ninth grade was associated with adolescents’ subsequent school engagement through changes in their psychological well-being. Method Latent growth modeling (LGM) was used to examine the levels of and changes in well-being during ninth grade. Next, school engagement (measured by school satisfaction …
Cytotoxic activity of some natural and synthetic guaianolides
2005
Several natural guaianolides and synthetic derivatives of repin (1) were tested and found to be active against tumor cell replication. Repin (1) and both mono- and di-halohydrin analogues (2, 7-9, 11, 12) showed significant antitumor potency. A more effective compound (17) was obtained by esterificating repin with the paclitaxel side chain.
Volatile components of aerial parts of Centaurea nigrescens an C. stenolepis growing wild in the Balkans
2010
The volatile constituents of the aerial parts of Centaurea nigrescens Willd, collected in Romania and of two samples of C. stenolepis A. Kerner from Bulgaria and Romania were obtained by hydrodistillation and analyzed. The main components of C. stenolepis were caryophyllene oxide (6.9-15.6%), hexahydrofarnesyl acetone (6.5-4.4%), heptacosane (6.0-4.9%) and p-vinyl guiacol (4.3-5.0%). The main components of C. nigrescens were caryophyllene oxide (9.9%), β-eudesmol (9.5%), spathulenol (7.6%), heptacosane (6.1%) and p-vinyl guiacol (5.5%). The chemotaxonomic significance with respect to their co-location in Sections Lepteranthus and Nigrescentes, respectively, is discussed.
ASTEROID SEARCH RESULTS FOR DIGITIZED ASTROPLATES OF 1.2m TELESCOPE IN BALDONE
2019
The work on the mass search for asteroids on astroplate images and the determination of their coordi- nates was begun in 2016. The basis for current search was the processing results of digitized photographic plates and films obtained at the observatory in Baldone in 1967-1993. Observations with a single exposure in different spectral bands were carried out using the 1.2m Schmidt telescope in Baldone. We used all observations in the U Johnson's spec- tral band (on plates) and significant part of them in V band (on films). Photometric band U was realized by combining emulsion ORWO Zu1 (Zu2 or Zu21 or Kodak 103aO or IIaO) with UG1 filter. For films with A600 emulsion and filter ZS17 a photome…
LA VALORIZZAZIONE DELLA FLORA SPONTANEA ATTRAVERSO LO STUDIO DI NUOVI BIOPESTICIDI: ARTEMISIA ARBORESCENS L.
2012
Il termine “biopesticidi” identifica un vasto insieme di molecole, sintetizzate naturalmente da piante od altri organismi vegetali, in grado di manifestare un’attività biologica nei confronti di agenti fitopatogeni di diversa origine, quali virus, batteri, funghi, artropodi ed altri. Tale attività può spaziare dalla semplice repressione di un particolare stadio di sviluppo del patogeno (sporulazione, crescita vegetativa, riproduzione) fino alla induzione di reazioni e processi metabolici che ne determinano la morte. Negli ultimi anni sono stati proposti molti nuovi formulati con queste caratteristiche, la cui diffusione, pur se ancora contenuta, si presenta in continua espansione. Verso que…