(Reseña sobre) Vicente Blasco Ibáñez: An Annotated Bibliography 1975-2002, de Christopher L. Anderson y Paul C. Smith

Fil: Contreras, María de los Angeles. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Thomas K. Hubbard. The Mask of Comedy. Aristophanes and Intertextual Parabasis, Ithaca y London, Cornell University Press, 1991, xii + 284 pp.

Fil: Fernández, Claudia Nélida. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

(Reseña sobre) Vicente Blasco Ibáñez: An Annotated Bibliography 1975-2002, de Christopher L. Anderson y Paul C. Smith

Fil: Contreras, María de los Angeles. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Little journeys to homes of great scientists ... written by Elbert Hubbard ...

bk. 2

Little journeys to homes of great scientists ... written by Elbert Hubbard ...

bk. 1

Molecular cloning and sequence analysis of the complestatin biosynthetic gene cluster

Streptomyces lavendulae produces complestatin, a cyclic peptide natural product that antagonizes pharmacologically relevant protein–protein interactions including formation of the C4b,2b complex in the complement cascade and gp120-CD4 binding in the HIV life cycle. Complestatin, a member of the vancomycin group of natural products, consists of an α-ketoacyl hexapeptide backbone modified by oxidative phenolic couplings and halogenations. The entire complestatin biosynthetic and regulatory gene cluster spanning ca. 50 kb was cloned and sequenced. It consisted of 16 ORFs, encoding proteins homologous to nonribosomal peptide synthetases, cytochrome P450-related oxidases, ferredoxins, nonheme halogenases, four enzymes involved in 4-hydroxyphenylglycine (Hpg) biosynthesis, transcriptional regulators, and ABC transporters. The nonribosomal peptide synthetase consisted of a priming module, six extending modules, and a terminal thioesterase; their arrangement and domain content was entirely consistent with functions required for the biosynthesis of a heptapeptide or α-ketoacyl hexapeptide backbone. Two oxidase genes were proposed to be responsible for the construction of the unique aryl-ether-aryl-aryl linkage on the linear heptapeptide intermediate. Hpg, 3,5-dichloro-Hpg, and 3,5-dichloro-hydroxybenzoylformate are unusual building blocks that repesent five of the seven requisite monomers in the complestatin peptide. Heterologous expression and biochemical analysis of 4-hydroxyphenylglycine transaminon confirmed its role as an aminotransferase responsible for formation of all three precursors. The close similarity but functional divergence between complestatin and chloroeremomycin biosynthetic genes also presents a unique opportunity for the construction of hybrid vancomycin-type antibiotics.

VO: a strongly correlated metal close to a Mott-Hubbard transition

Here, we present experimental and computational evidences to support that rocksalt cubic VO is a strongly correlated metal with non-Fermi-liquid thermodynamics and an unusually strong spin-lattice coupling. An unexpected change of sign of metallic thermopower with composition is tentatively ascribed to the presence of a pseudogap in the density of states. These properties are discussed as signatures of the proximity to a magnetic quantum phase transition. The results are summarized in an electronic phase diagram for the 3d monoxides, which resembles that of other strongly correlated systems. The structural and electronic simplicity of 3d monoxides makes them ideal candidates to progress in the understanding of highly correlated electron systems.

Letter from Thomas Dawes of Boston to Thomas Hubbard, March 27, 1764

This letter to Harvard Treasurer Thomas Hubbard accompanied a gift of books from Dawes.

List of books believed to be bequest of Thomas Hubbard, undated

A pencilled annotation in the hand of John Langdon Sibley reads: "Is not this the bequest of Thos. Hubbard in 1773-4." Thomas Hubbard, who served as Harvard's treasurer and as Commissary General of the Province of Massachusetts Bay, died in 1773.