Gregorio Weinberg : en el umbral de la historia

Semblanza de Gregorio Weinberg y apreciación de su obra en los campos de la educación, la historia de la ciencia y la historia de las ideas en América Latina. Señala su condición de eminente intelectual hispanoamericano.

La lección de Gregorio Weinberg en la UNESCO, o, la impaciencia como virtud

Gregorio Weinberg colaboró con la UNESCO durante más de veinte años en importantes proyectos como la Historia de la Humanidad y la Historia General de América Latina. Se recuerda con admiración y reconocimiento los hitos de esa colaboración y los de la amistad personal forjada a su socaire.

Intereses intelectuales de Gregorio Weinberg

Se destaca la labor de Gregorio Weinberg como historiador de las ideas y de la política latinoamericanas; como promotor de los estudios de la ciencia y su historiografía en América Latina; como así también su desempeño institucional y su compromiso con un nuevo humanismo.

Gregorio Weinberg : educador de “Nuestra América"

Entre las múltiples cualidades humanas e intelectuales de Gregorio Weinberg, se pone de relieve la faz educativa: como docente, director de colecciones y editor. Se destaca especialmente la fecunda integración que logró entre modernización e identidad en sus proyectos editoriales y educativos, de los que resulta una suerte de vindicación hispanoamericana de inspiración martiana.

Gregorio Weinberg : un editor necesario

Recuerdo personal acerca del afecto generado por Gregorio Weinberg. De manera lateral se intenta dar cuenta de la relación entre la literatura de viajes y el estatuto de esa escritura entre los intelectuales del siglo XVIII. Literatura menor que Weinberg se animó a editar.

Entrevista al Dr. Gregorio Weinberg

Fil: Segal, Alicia.

Liliana Weinberg: El ensayo, entre el paraíso y el infierno. México, Universidad Nacional Autónoma de México, Fondo de Cultura Económica, 2001, 115 p., 21 x 14 cm.

Fil: Nállim, Magdalena Ercilia.

Dick Weinberg, Harry Holiday, Patrick Hayes(?), UM Men's Swimming, 1949, 300-yard Medley Relay Team

[L-R: ]

300-yard medley relay team, 1947 NCAA Champion, UM Swimming, Richard Weinberg, Harry Holiday, Bob Sohl.

[The medley relay team won the 1947 NCAA crown with a time of 2:54.9. In the 1947/48 meet with Iowa they set a world record of 2:49.1]

Characterization Of Microsatellite Markers Developed From Prosopis Rubriflora And Prosopis Ruscifolia (leguminosae - Mimosoideae), Legume Species That Are Used As Models For Genetic Diversity Studies In Chaquenian Areas Under Anthropization In South America.

Prosopis rubriflora and Prosopis ruscifolia are important species in the Chaquenian regions of Brazil. Because of the restriction and frequency of their physiognomy, they are excellent models for conservation genetics studies. The use of microsatellite markers (Simple Sequence Repeats, SSRs) has become increasingly important in recent years and has proven to be a powerful tool for both ecological and molecular studies. In this study, we present the development and characterization of 10 new markers for P. rubriflora and 13 new markers for P. ruscifolia. The genotyping was performed using 40 P. rubriflora samples and 48 P. ruscifolia samples from the Chaquenian remnants in Brazil. The polymorphism information content (PIC) of the P. rubriflora markers ranged from 0.073 to 0.791, and no null alleles or deviation from Hardy-Weinberg equilibrium (HW) were detected. The PIC values for the P. ruscifolia markers ranged from 0.289 to 0.883, but a departure from HW and null alleles were detected for certain loci; however, this departure may have resulted from anthropic activities, such as the presence of livestock, which is very common in the remnant areas. In this study, we describe novel SSR polymorphic markers that may be helpful in future genetic studies of P. rubriflora and P. ruscifolia.

Microsatellite In Aeschynomene Falcata (leguminosae): Diversity, Cross-amplification, And Chromosome Localization.

Aeschynomene falcata is an important forage species; however, because of low seed production, it is underutilized as forage species. Aeschynomene is a polyphyletic genus with a challenging taxonomic position. Two subgenera have been proposed, and it is suggested that Aeschynomene can be split in 2 genera. Thus, new markers, such as microsatellite sequences, are desirable for improving breeding programs for A. falcata. Based on transferability and in situ localization, these microsatellite sequences can be applied as chromosome markers in the genus Aeschynomene and closely related genera. Here, we report the first microsatellite library developed for this genus; 11 microsatellites were characterized, with observed and expected heterozygosities ranging from 0.0000 to 0.7143 and from 0.1287 to 0.8360, respectively. Polymorphic information content varied from 0.1167 to 0.7786. The departure from Hardy-Weinberg equilibrium may have resulted from frequent autogamy, which is characteristic of A. falcata. Of the 11 microsatellites, 9 loci were cross-amplified in A. brevipes and A. paniculata and 7 in Dalbergia nigra and Machaerium vestitum. Five of these 7 cross-amplified microsatellites were applied as probes during the in situ hybridization assay and 2 showed clear signals on A. falcata chromosomes, ensuring their viability as chromosome markers.