Le juif errant d'aujourd'hui : et́ude sur l'eḿigration des Israélites de l'Europe orientale aux Etats-Unis de l'Amérique du Nord ; avec 40 tabl. statistiques et 9 diagr.

par L. Hersch

Les juifs d'aujourd'hui

par E. Eberlin

Guy, Alain, Les philosophes espagnols d'hier et d'aujaurd'hui, Privat éditeur, Toulouse, 1956, Tomo I Époques at auteurs, 409 p. y Tomo II, Textes choisis, 300 págs.

Fil: Roig, Arturo Andrés.

Romanç nou hon se reciten los treballs de la gent pobra, per lo càres que shan possàt en València totes les coses y en especial lo menjatìu de modo que hui costa el viure mes afanys [Texto impreso] : escrit en aquest any 1763

Hay un ejemplar encuadernado con: Poesías colocadas en el pórtico del Convento de San Francisco de Valencia (NP849.91/3086).

Identification of 10 novel snoRNA gene clusters from Arabidopsis thaliana

Ten novel small nucleolar RNA (snoRNA) gene clusters, consisting of two or three snoRNA genes, respectively, were identified from Arabidopsis thaliana. Twelve of the 25 snoRNA genes in these clusters are homologous to those of yeast and mammals according to the conserved antisense sequences that guide 2′-O-ribose methylation of rRNA. The remaining 13 snoRNA genes, including two 5.8S rRNA methylation guides, are new genes identified from A.thaliana. Interestingly, seven methylated nucleotides, predicted by novel snoRNAs Z41a–Z46, are methylated neither in yeast nor in vertebrates. Using primer extension at low dNTP concentration the six methylation sites were determined as expected. These snoRNAs were recognized as specific guides for 2′-O-ribose methylation of plant rRNAs. Z42, however, did not guide the expected methylation of 25S rRNA in our assay. Thus, its function remains to be elucidated. The intergenic spacers of the gene clusters are rich in uridine (up to 40%) and most of them range in size from 35 to 100 nt. Lack of a conserved promoter element in each spacer and the determination of polycistronic transcription from a cluster by RT–PCR assay suggest that the snoRNAs encoded in the clusters are transcribed as a polycistron under an upstream promoter, and individual snoRNAs are released after processing of the precursor. Numerous snoRNA gene clusters identified from A.thaliana and other organisms suggest that the snoRNA gene cluster is an ancient gene organization existing abundantly in plants.

Functional morphology and ontogeny of Keichousaurus hui (Reptilia, Sauropterygia) / Kebang Lin --, Olivier Rieppel --.

n.s. no.39(1998)

Zhongguo ren ming da ci dian ; Zang Lihe deng bian.

Mode of access: Internet.

Allemands d'hier & d'aujourd'hui; esquisses historiques.

Mode of access: Internet.