Ácido ent-16alfa,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16

Phytochemical investigation of the leaves and branches of a specimen of Ouratea semiserrata led to the isolation and characterization of ent-16alpha,17-dihydroxykauran-19-oic acid, along with other natural products. This diterpenoid and its derivatives were used to unambiguous ¹H and 13C chemical shifts assignments and to indicate some mistake data described in the literature as consequence mainly of the stereochemicals of the chiral carbons C-4 and C-16. The HRMS spectra were also analysed.

Hungarian Dances : No. 17

Soitinnus: Ork.

Preludeja op. 17 nrot 2, 6, 9, 10, 11, 12, 15 & 23

Digitoitu 13. 8. 2008.

Centenario del Protectorado de Marruecos, Madrid: Instituto de Historia y Cultura Militar, 2012. Número Extraordinario II de la Revista de Historia Militar, LVI. 316 págs. [17 x 24].

Monografía publicada en la Revista de Historia Militar del Instituto de Historia y Cultura Militar con motivo del centenario de la creación del Protectorado español sobre Marruecos en 1912 y al que este instituto no podía quedar indiferente.

De cantico Israëlitarum ad Beerah, numer. XXI. 17. 18

Arkit: 1 arkintunnukseton lehti, A4 B1.

Ad capitis III. Esai. comm. 16. et 17

Arkit: A-B4 C2.

Remoção dos hormônios 17β-estradiol e 17α-etinilestradiol de soluções aquosas empregando turfa decomposta como material adsorvente

This paper describes the adsorption of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) from aqueous solution by decomposed peat. The peat presented a good adsorption process, close to 76.2% for E2 removal and approximately 55.0% for EE2. Moreover, the results indicated a probable multi-layered process. Adsorption isotherms were well fitted by Freundlich model. The data were evaluated considering the pseudo-first-order and pseudo-second-order approaches, being the second more significant mechanism in the rate-controlling step. Thermodynamic data revealed that hormones adsorption onto peat is spontaneous under the employed experimental conditions. The results confirmed the potential of this adsorbent to be employed for effluents treatment.

Muuttuvat tilat lasten- ja nuortenkirjallisuuden tutkijoiden pohdittavana : : metamorphic spaces in children's literature and culture 17.-19.1.2008 Jyväskylä

Ajankohtaista

Melody I, Op. 17 N:o 1

Ei vapaa, vapautuu 2027. Kosti Vehanen (1887-1957).

Melody II, Op. 17 N:o 2

Ei vapaa, vapautuu 2027. Kosti Vehanen (1887-1957).

Melody III, Op. 17 N:o 3

Ei vapaa, vapautuu 2027. Kosti Vehanen (1887-1957).