Sensitization to Aeroallergens in Asthmatic Children Living in Rural or Urban Area in Montes Claros, Minas Gerais, Brazil

Univ Estadual Montes Claros, Montes Claros, BrazilUNIFESP EPM, São Paulo, BrazilUNIFESP EPM, São Paulo, BrazilWeb of Scienc

Earliest occurrence of Hydrocynus (Characiformes, Alestidae) from Eocene continental deposits of Méridja Hamada (northwestern Sahara, Algeria)

We here report the oldest remains (teeth) of the African tigerfish (Hydrocynus) from the Oued MĂŠridja and Garet Dermchane sections, Hamada of MĂŠridja deposits, in southwestern Algeria. The tigerfish, a large carnivorous fish today represented by several species in the freshwaters of Africa, was previously found in upper middle to upper Eocene deposits in Egypt and Libya. The remains described here are several million years older, being early to middle Eocene in age, and are associated with other fish elements including lungfish, polypterid, amiiform, possible cichlid, and Alestes/Brycinus material, along with several fish elements that cannot be associated with a specific taxon and some fragmentary amphibian bones. This represents the first description of a freshwater fish assemblage from the Eocene of Algeria, although a short list of fish taxa from Eocene Algerian deposits was previously reported. Furthermore, these new Algerian fossils allow us to assess the hypothesized existence of an east-west or west-east permanent hydrological connection between eastern and western parts of northern Africa. We suggest that the shared presence of tigerfish in the Eocene deposits of Algeria, Libya and Egypt does not necessarily indicate a permanent (i.e., non-seasonal) connection east-west or west-east among these areas. Rather, the observed faunal similarities could have been the result of seasonal flooding that caused the dispersal of Hydrocynus and associated taxa across coastal flood plains.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Anaphylaxis in Latin America: a Report of the Online Latin American Survey on Anaphylaxis (OLASA)

Universidade Federal de São Paulo, São Paulo, BrazilSLAAI, Buenos Aires, DF, ArgentinaSLAAI, Caracas, VenezuelaUniv Estadual Montes Claros, Montes Claros, BrazilUniv Fed Parana, BR-80060000 Curitiba, Parana, BrazilUniv Fed Rio Grande do Sul, Porto Alegre, RS, BrazilSLAAI, São Paulo, BrazilUniversidade Federal de São Paulo, São Paulo, BrazilWeb of Scienc

Different origins of green-light photoluminescence emission in structurally ordered and disordered powders of calcium molybdate

A strong greenish-light photoluminescence (PL) emission was measured at room temperature for disordered and ordered powders of CaMoO4 prepared by the polymeric precursor method. The structural evolution from disordered to ordered powders was accompanied by XRD. Raman spectroscopy, and TEM imagery. High-level quantum mechanical calculations in the density functional framework were used to interpret the formation of the structural defects of disorder powders in terms of band diagram and density of states. Complex cluster vacancies [MoO3 center dot V-O(z)] and [CaO7 center dot V-O(z)] (where V-O(z) = V-O(X), V-O(center dot), V-O(center dot center dot)) were suggested to be responsible to the appearance of new states shallow and deeply inserted in the band gap. These defects give rise to the PL in disordered powders. The natural PL emission of ordered CaMoO4 was attributed to an intrinsic slight distortion of the [MoO4] tetrahedral in the short range