Now showing items 1-10 of 256
First description of the female of the jumping spider Balmaceda nigrosecta Mello-Leitão (Salticidae, Dendryphantini, Marpissina)
(Pensoft Publishers, 2016-02)
The female of Balmaceda nigrosecta Mello-Leitão, 1945 is described and illustrated for the first time. In addition, this paper further illustrates the male, and provides the first known observations on the natural history ...
Um exemplo de negação do conceito de elemento na filosofia natural
The focus of this work is to present an example of refutation of the concept of element inside the seventeenth-century scientific revolution, mainly through Robert Boyle’s The Sceptical Chymist. On the first section of ...
Eigenproblems in timber structural elements with uncertain properties
A stochastic model of sawn timber structural elements of Argentinean Eucalyptusgrandis is applied to the study of two eigenproblems. One is the free vibrations problem which, after being solved, yields the natural frequencies ...
Major- and trace-element composition of olivine, perovskite, clinopyroxene, Cr-Fe-Ti oxides, phlogopite and host kamafugites and kimberlites, Alto Paranaiba, Brazil
(MINERALOGICAL ASSOC CANADA, 2008)
An integrated whole-rock petrographic and geochemical study has been carried out on kamafugites and kimberlites of the Late Cretaceous Alto Paranaiba igneous province, in Brazil, and their main minerals, olivine, clinopyroxene, ...
First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
(Sociedade Brasileira de Genética, 2008-01-01)
Several species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first ...
On the harmonic response of plates with the shear deformation effect using the elastodynamic solution in the boundary element method
(Elsevier Sci LtdOxfordInglaterra, 2007)
Biogeography, vicariance and conservation of snakes of the neglected and endangered Caatinga region, north-eastern Brazil
AimOur aims were to test the predictions of the vicariance model, searching for natural, non-random biogeographical units using data on snake distributions, and to assess the conservation of biogeographical patterns and ...
Elemental composition of airborne particulate matter from Santiago City, Chile, 1976
(Air Pollution Control Association, 1984)
In Chile, the State Public Health Office (Ministerio de Salud Pública) is responsible for pollution control and for air quality. This office has been monitoring only toxic gases and total suspended particulate matter.1.2 ...
An experimentally validated finite element formulation for modeling 3D rotational energy harvesters
Piezoelectric energy harvesting devices convert mechanical energy into electrical energy due to the mechanical deformations of the structures. Energy harvesting prototypes are used to feed low-power electronic devices and ...
Imprints of fast-rotating massive stars in the Galactic Bulge
(NATURE PUBLISHING GROUP, 2011)
The first stars that formed after the Big Bang were probably massive(1), and they provided the Universe with the first elements heavier than helium (`metals`), which were incorporated into low-mass stars that have survived ...