5,573 research outputs found
The Challenges of Setting Up a Clinical Study with the New European Union Medical Device Regulation
publishersversionpublishe
Avaliação de dados de radiação solar na escala diária modelada a partir de sensor remoto orbital para o Brasil.
Nesse trabalho, avaliou-se um método do qual se obtém dados estimados de radiação solar diária, derivados de satélites por banco de dados do Nasa-Power, já utilizado nos Estados Unidos, Argentina e Austrália, e que vem apresentando resultados satisfatórios quando comparados com os dados observados das estações automáticas
Avaliação de adubos orgânicos, elaborados a partir de resíduos de pescado, no cultivo da batata (Solanum tuberosum) em bases ecológicas.
Detection of Mycobacterium spp. in Coalho cheese commercialized in the city of Caicó-RN, Brazil.
Artisanal Coalho cheese is a popular dairy product, widely consumed in the Northeast region of Brazil, and is produced with raw or pasteurized milk. Microbial contamination of cheeses has very important consequences, both for the dairy industry, given the potential economic losses, and for public health, due to the risk of outbreaks of foodborne diseases. The present study aimed to detect Mycobaterium spp. in Coalho cheese commercialized in the city of Caicó-RN Brazil, using bacterial culture and molecular diagnosis. 50 samples of Coalho cheese obtained from local street market were analyzed, 35 of which were made from raw milk (artesanal cheese) and 15 with pasteurized milk (industrialized cheese)
Quasi-degenerate neutrinos and tri-bi-maximal mixing
Assuming high-energy tri-bi-maximal mixing we study the radiative running of
leptonic mixing angles and obtain limits on the high-energy scale from
requiring consistency with the observed mixing. We construct a model in which a
non-Abelian discrete family symmetry leads both to a quasi-degenerate neutrino
mass spectrum and to near tri-bi-maximal mixing.Comment: 7 pages, to appear in the proceedings of DISCRETE'0
Functional Bosonization of Non-Relativistic Fermions in Dimensions
We analyze the universality of the bosonization rules in non-relativistic
fermionic systems in . We show that, in the case of linear fermionic
dispersion relations, a general fermionic theory can be mapped into a gauge
theory in such a way that the fermionic density maps into a magnetic flux and
the fermionic current maps into a transverse electric field. These are
universal rules in the sense that they remain valid whatever the interaction
considered. We also show that these rules are universal in the case of
non-linear dispersion relations provided we consider only density-density
interactions. We apply the functional bosonization formalism to a
non-relativistic and non-local massive Thirring-like model and evaluate the
spectrum of collective excitations in several limits. In the large mass limit,
we are able to exactly calculate this spectrum for arbitrary density-density
and current-current interactions. We also analyze the massless case and show
that it has no collective excitations for any density-density potential in the
Gaussian approximation. Moreover, the presence of current interactions may
induce a gapless mode with a linear dispersion relation.Comment: 26 Pages, LaTeX, Final version to appear in International Journal of
Modern Physics
Plantas como potenciais biorreatores na produção de vacinas e fármacos.
bitstream/item/88008/1/DOC1800001.pd
- …