Manuela, la impensable: un diálogo entre Amor y gloria: el romance de Manuela Sáenz y el Libertador Simón Bolívar (1952), de María Jesús Alvarado, y Manuela Sáenz, la divina loca (195?), de Olga Briceño (Estudios)

En este artículo se analiza el diálogo que establecen las intelectuales latinoamericanas con la Historia oficial por medio de determinadas ficciones de archivo publicadas en la década de 1950. Al respecto, es importante tener en cuenta que tras la adquisición de derechos civiles por parte de las mujeres latinoamericanas en las décadas de 1930 y 1940 –cuando conquistaron el derecho al voto, ingresaron masivamente a las universidades y se erigieron como posibles representantes de los intereses públicos–, las intelectuales del continente demandaron la adscripción a alguna genealogía histórica que les proporcionara coherencia y profundidad identitaria. En muchas ocasiones debieron echar mano del discurso literario para negociar su existencia presente con el pasado histórico y ampliar los límites de la fundación continental con la visibilización de las voces y subjetividades femeninas. En este marco se publican los dos libros que componen el corpus: Manuela Sáenz, la divina loca (195?), de la venezolana Olga Briceño, y Amor y gloria: el romance de Manuela Sáenz y el Libertador Simón Bolívar (1952), de la peruana María Jesús Alvarado. Estas lecturas permitirán reflexionar en torno al proceso de historización de la alteridad demandado por las nuevas ciudadanas del continente, determinar sus alcances y la subjetividad resultante de este enfrentamiento.

Dating archeological ceramics from the Valley of Vitor, Arequipa by the TL method

The age of some ancient pottery from the Valley of Vitor in the region of Arequipa, Peru, is determined by the thermoluminescence (TL) method. For dating, a 325 degrees C TL peak was used and irradiation with -dose from 5 to 50Gy was carried out for the additive method, and from 0.4 to 5Gy for the regeneration method. For these dose values, the TL intensity is observed to grow linearly, obtaining an accumulated dose of 1.62 +/- 0.09Gy and 1.36 +/- 0.03Gy for the additive and regeneration methods, respectively. The age (A) of the sample was calculated by the two methods, being A=867 +/- 195 years after Christ (AC) for the additive method and A=1050 +/- 157 years AC for the regeneration method. Both results are within 800-1200 years AC, which is the period of the Wari culture.

Network genealogy of 195-bp satellite DNA supports the superimposed hybridization hypothesis of Trypanosoma cruzi evolutionary pattern

Trypanosoma cruzi is highly diverse genetically and has been partitioned into six discrete typing units (DTUs), recently re-named T. cruzi I-VI. Although T. cruzi reproduces predominantly by binary division, accumulating evidence indicates that particular DTUs are the result of hybridization events. Two major scenarios for the origin of the hybrid lineages have been proposed. It is accepted widely that the most heterozygous TcV and TcVI DTUs are the result of genetic exchange between TcII and TcIII strains. On the other hand, the participation of a TcI parental in the current genome structure of these hybrid strains is a matter of debate. Here, sequences of the T. cruzi-specific 195-bp satellite DNA of TcI, TcII, Tat, TcV, and TcVI strains have been used for inferring network genealogies. The resulting genealogy showed a high degree of reticulation, which is consistent with more than one event of hybridization between the Tc DTUs. The data also strongly suggest that Tat is a hybrid with two distinct sets of satellite sequences, and that genetic exchange between TcI and TcII parentals occurred within the pedigree of the TcV and TcVI DTUs. Although satellite DNAs belong to the fast-evolving portion of eukaryotic genomes, in >100 satellite units of nine T. cruzi strains we found regions that display 100% identity. No DTU-specific consensus motifs were identified, inferring species-wide conservation. (C) 2010 Elsevier B.V. All rights reserved.

Genomic organization and transcription analysis of the 195-bp satellite DNA in Trypanosoma cruzi

The 195-bp satellite DNA is the most abundant Trypanosoma cruzi repetitive sequence. Here we show by RNA blotting and RT-PCR that 195 SAT is intensely transcribed. We observed a positive correlation between the level of satellite RNA and the abundance of the satellite copies in the genome of T cruzi strains and that the satellite expression is not developmentally regulated. By analyzing CL Brener individual reads, we estimated that 195 SAT corresponds to approximately 5% of the CL Brener genome. 195 SAT elements were found in only 37 annotated contigs, indicating that a large number of satellite copies were not incorporated into the assembled data. The assembled satellite units are distributed in non-syntenic regions with Trypanosoma brucei and Leishmania major genomes, enriched with surface proteins, retroelements, RHS and hypothetical proteins. Satellite repeats were not observed in annotated subtelomeric regions. We report that 12 satellite sequences are truncated by the retroelement VIPER. (C) 2008 Elsevier B.V. All rights reserved.

Estudo eletroquímico de revestimentos ambientalmente amigáveis aplicados para proteção da liga de alumínio 1200

Pós-graduação em Química - IQ