Oeuvres complètes de Boileau Despréaux. Tome 1 / , précédées d'une notice sur sa vie par M. Daunou,...

Collection : Collection des meilleurs ouvrages de la langue française en prose et en vers

Oeuvres complètes de Boileau Despréaux. Tome 3 / , précédées d'une notice sur sa vie par M. Daunou,...

Collection : Collection des meilleurs ouvrages de la langue française en prose et en vers

Oeuvres complètes de Boileau Despréaux. Tome 2 / , précédées d'une notice sur sa vie par M. Daunou,...

Collection : Collection des meilleurs ouvrages de la langue française en prose et en vers

Oeuvres poétiques de Boileau Despréaux / avec une notice biographique et littéraire et des notes par E. Géruzez,...

Collection : Nouvelles éditions classiques, publiées avec des notes historiques et littéraires

Semana Cultural

Archivo Fotográfico

Resolución N° 47 del 26 de marzo de 2007 ¿Cuáles son los criterios que tiene en cuenta la Cámara de Comercio cuando evalúa los eventos de fallecimiento del socio gestor y la representación de las cuotas de este en las sociedades en comandita?

Servicios registrales

Dr. Barry Keith Grant

Professor of Popular Culture and Film

The crystal and molecular structure of bis (pyridoxamine) copper (II) dinitrate monohydrate

The crystal structure of Cu(PM)2(N03hoH20 (where PM is pyridoxamine, CSHI2N202) has been determined from three dimensional x-ray diffraction data. The crystals are triclinic, space group pI, a = 14.248 (2), b = 8.568 (1), c = 9.319 (1) 1, a = 94.08 (1), e = 89.73 (1), y~~ 99.18 (1)°, z = 2, jl(MoK) = 10.90 em-I, Po = 1.61 g/cm3 and Pc = 1.61 g/em3• The structure a was solved by Patterson techniques from data collected on a Picker 4-circle diffractometer to 26max = 45°. All atoms, including hydrogens, have been located. Anisotropic thermal parameters have been refined for all nonhydrogen atoms. For the 2390 independent reflections with F ? 3cr(F) , R = 0.0408. The results presented here provide the first detailed structural information of a metal complex with PM itself. The copper atoms are located on centres of symmetry and each is chela ted by two PM zwitterions through the amino groups and phenolate oxygen atoms. The zwitterionic form found in this structure involves the loss of a proton from the phenolate group and protonation of the pyridine ring nitrogen atoms. The two independent Cu(PM)2 moieties are symmetrically bridged by a single oxygen atom from one of the nitrate groups. The second nitrate group is not coordinated to the copper atoms but is central to an extensive hydrogen bonding network involving the water molecule and uncoordinated functional groups of PM.

Characterization of black fly (Diptera: Simuliidae) silk proteins

Black fly (Simuliidae) silk is produced by the larvae and pharate pupae and is used for anchorage and cocoon production. There exists limited information on simuliid silks, including protein composition and genetic sequences encoding such proteins. The present study aimed to expand what is known about simuliid silks by examining the silks of several simuliid species and by making comparisons to the silk of non-biting midges (Chironomidae). Silk glands were dissected out of larval and pupal simuliids, and protein contents were separated by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and visualized with silver stain. Protein contents were compared by mass in kilodaltons (kDa) between life stages and among species. Polymerase chain reaction (PCR) was used to expand upon known gene sequence information, and to determine the presence of genes homologous to chironomid silk. SDS-PAGE of cocoons revealed the presence of a 56 kDa and a 67 kDa protein. Silk gland contained as many as 28 different proteins ranging from 319 kDa to 8 kDa. Protein profiles vary among species, and group into large (>200), intermediate(>100), and small (<100) protein classes as is found in chironomids. It is likely that silk evolved in a common ancestor of simuliids and chironomids

Aplicación del enfoque de la teoría general de sistemas en la enseñanza de las ciencias sociales (Historia de México) en el nivel medio básico

Tesis (Maestría en Enseñanza Superior) UANL

Portraits et souvenirs littéraires

UANL