Annual ceremony of the Pawnee medicine men / by Ralph Linton, Assistant Curator of North American Ethnology.

no.8(1923)

Use of tobacco among North American Indians / by Ralph Linton, Assistant Curator of North American Ethnology.

no.15(1924)

Pennsylvanian invertebrates of the Mazon Creek area, Illinois: the Essex fauna and medusae / Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. --

v.12:no.7(1968)

The Annelida Polychaeta / by Ralph V. Chamberlin.

v.48 (1919) plates

The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror in the Years 1839-1843 :under the command of Captain Sir James Clark Ross /by Joseph Dalton Hooker.

v.1 Text (1844)

La concepció evolucionista de la natura en el programa de difusió de la cultura cientí­fica d'Antoni Bergnes de las Casas (1801-1879)

La recerca es centra en l'™obra de divulgació cientí­fica d'™Antoni Bergnes de las Casas al llarg del segle XIX a Barcelona. En les obres i revistes que publicà destaca la difusió de noves concepcions en la història natural. En elles es divulga la teoria evolucionista de Lamarck i d'altres models evolutius similars, però que defensen la intervenció divina en el procés. Aquests fets posen de manifest la presència de teories evolutives a Catalunya i a Espanya en la primera meitat del segle XIX, i de la teoria evolucionista de Lamarck a principi dels anys seixanta del segle.

Catadiscus pomaceae sp. n. (Trematoda, Paramphistomatidae) from Pomacea canaliculata (Lamarck, 1801) (Prosobranchia, Ampullariidae)

Catadiscus pomaceae sp. n. from the intestine of the prosobranch mollusc Pomacea canaliculata (Lamarck, 1801), is described. The host snail was collected from a lenitic biotope belonging to the Riachuelo basin (Corrientes province, Argentina) during 1985-1986. So far the species of the genus Catadiscus Cohn, 1904 have been recorded in amphibians and reptiles. This is the first instance of a species of that genus parasitizing a mollusc.

Relocalization of telomeric Ku and SIR proteins in response to DNA strand breaks in yeast.

Telomeric TG-rich repeats and their associated proteins protect the termini of eukaryotic chromosomes from end-to-end fusions. Associated with the cap structure at yeast telomeres is a subtelomeric domain of heterochromatin, containing the silent information regulator (SIR) complex. The Ku70/80 heterodimer (yKu) is associated both with the chromosome end and with subtelomeric chromatin. Surprisingly, both yKu and the chromatin-associated Rap1 and SIR proteins are released from telomeres in a RAD9-dependent response to DNA damage. yKu is recruited rapidly to double-strand cuts, while low levels of SIR proteins are detected near cleavage sites at later time points. Consistently, yKu- or SIR-deficient strains are hypersensitive to DNA-damaging agents. The release of yKu from telomeric chromatin may allow efficient scanning of the genome for DNA strand breaks.

Lettres de la marquise DU CHATELET à M. de Maupertuis. (1734-1741).

Originaux.

Sir Birdwood [officier anglais] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54214

Général Sir Neville Macready, chef de la police à Londres : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55157