Le grand chemin de Compostelle - download pdf or read online

By Jean-Claude Bourles

ISBN-10: 2228891630

ISBN-13: 9782228891639

"Nous marchons, vers une ville de bout du monde. L'une de ces cit?s baroques, un peu mythiques, comme nous les aimons en Bretagne. L'un de ces hauts lieux de naufrage dispers?s dans le monde, avec lesquels l'humanit? errante aime ? entretenir d'illusoires rendez-vous."   Chapeau et manteau de feutre, besace au c?t?, bourdon en major : depuis plus d'un mill?naire les p?lerins de Saint-Jacques-de-Compostelle nourrissent l'imaginaire occidental. Chemin de foi, chemin de savoir et d'?changes, chemin d'initiation : Compostelle fut tout cela, et plus encore.  

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3) to afford blocked nucleosides (£) which were then de-protected with methanolic am­ monia to nucleosides (4). In similar fashion, condensation of halogenose (2,) with trimethylsilylatecl uracils followed by removal of blocking groups with methanolic ammonia gave the 2'-fluoro-ara-U nucleosides (J5). The synthesis of the 29 J. J. Fox, C. Lopez and K. A. Watanabe thymine nucleoside, 2'-fluoro-5-methyl-ara-U, [FMAU, 5f, Fig. 3] is more conveni­ ently prepared (Watanabe, Su, Fox, unpublished) by treatment of 4f with aqueous acetic acid at reflux temperature.

04 1 * ED 90 = effective dose to inhibit HSV-I replication by 9 0 % . t I D 5 0 = dose necessary for 5 0 % inhibition of growth of Vero cells. 25 substituent confers better antiviral activity to these 5-iodocytosine nucleosides than does a 2'-hydroxyl or a 2* -hydrogen substituent. A similar conclusion is warranted from a comparison of the 5-iodouracil nucleosides [ara-5-iodouracil (ara-IU), IdU, and FIAU (5§)j. In the thymine series, 2'-fluoro-5-methyl-ara-U (FMAU) is clearly more effective against HSV-1 than is ara-T.

4. H H Ri» H ) (R «CH 3 ■, R, - O H ) Chloramphenicol OH | N o r p l i c a c e t i n ( R = CH 3 HN ) (R« H ,N/1 CH 3 Plicacetin Bamicetin H C—C—CH,O H z I I OH H ό R,«H ) Oxamicetin ; NH 0 ( R = (CH3)2N) H X 0 CH2OH J-N-iH HO. *kNACH o H OH 0 Actinobolin Sparsomycin Chemical structures of pyrimidine nucleoside antibiotics that inhibit protein synthesis (gougerotin, blasticidin S , anthelmycin, amicetin, bamicetin, oxamicetin, plicamicetin and norplicacetin) and other protein synthesis inhibitors that act on the acceptor site of the peptidyl transferase center (chloramphenicol, actinobolin and sparsomycin) .

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Le grand chemin de Compostelle by Jean-Claude Bourles

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