EXPONENTIAL GENERALIZED DISTRIBUTIONS

In this paper we generalize the Fourier transform from the space of tempered distributions to a bigger space called exponential generalized distributions. For that purpose we replace the Schwartz space S by a smaller space X0 of smooth functions such that, among other properties, decay at infinity faster than any exponential. The construction of X0 is such that this space of test functions is closed for derivatives, for Fourier transform and for translations. We equip X0 with an appropriate locally convex topology and we study it’s dual X'0; we call X&#8242;0 the space of exponential generalized distributions. The space X&#8242;0 contains all the Schwartz tempered distributions, is closed for derivatives, and both, translations and Fourier transform, are vector and topological automorphisms in X&#8242;0. As non trivial examples of elements in X&#8242;0, we show that some multipole series appearing in physics are convergent in this space.</p

Behaviour of NBD-head group labelled phosphatidylethanolamines in POPC bilayers: a molecular dynamics study

A complete homologous series of fluorescent phosphatidylethanolamines (diCnPE), labelled at the head group with a 7-nitrobenz-2-oxa-1,3-diazo-4-yl(NBD) fluorophore and inserted in 1-palmitoyl, 2-oleoyl-snglycero- 3-phosphocholine (POPC) bilayers, was studied using atomistic molecular dynamics simulations. The longer-chained derivatives of NBD-diCnPE, with n = 14, 16, and 18, are commercially available, and widely used as fluorescent membrane probes. Properties such as location of atomic groups and acyl chain order parameters of both POPC and NBD-diCnPE, fluorophore orientation and hydrogen bonding, membrane electrostatic potential and lateral diffusion were calculated for all derivatives in the series. Most of these probes induce local disordering of POPC acyl chains, which is on the whole counterbalanced by ordering resulting from binding of sodium ions to lipid carbonyl/glycerol oxygen atoms. An exception is found for NBD-diC16PE, which displays optimal matching with POPC acyl chain length and induces a slight local ordering of phospholipid acyl chains. Compared to previously studied fatty amines, acyl chain-labelled phosphatidylcholines, and sterols bearing the same fluorescent tag, the chromophore in NBD-diCnPE locates in a similar region of the membrane (near the glycerol backbone/carbonyl region) but adopts a different orientation (with the NO2 group facing the interior of the bilayer). This modification leads to an inverted orientation of the P–N axis in the labelled lipid, which affects the interface properties, such as the membrane electrostatic potential and hydrogen bonding to lipid head group atoms. The implications of this study for the interpretation of the photophysical properties of NBD-diCnPE (complex fluorescence emission kinetics, differences with other NBD lipid probes) are discussed

Generalized Hermitean ultradistributions

summary:In this paper we define, by duality methods, a space of ultradistributions \G _\omega ' (\Bbb R ^N). This space contains all tempered distributions and is closed under derivatives, complex translations and Fourier transform. Moreover, it contains some multipole series and all entire functions of order less than two. The method used to construct $\Bbb G _\omega ' (\Bbb R ^N)$ led us to a detailed study, presented at the beginning of the paper, of the duals of infinite dimensional locally convex spaces that are inductive limits of finite dimensional subspaces

Análise sensorial de cocada saborizada com polpa de maracujá do mato.

A produção de maracujá é de grande importância para a economia brasileira devido ao emprego intensivo de mão-de-obra, geração de renda e, principalmente, pela colheita continuada da safra ao longo do ano

Recursos genéticos de abóbora: caracterização morfoagronômica e incremento do valor nutricional.

A deficiência de vitamina A é um problema de saúde pública e a Região Nordeste é a mais atingida no país, principalmente a população rural. Para combatê-la são indicadas fontes alimentares reconhecidamente ricas em substâncias precursoras dessa vitamina, a exemplo dos carotenóides encontrados em hortaliças como a abóbora (Cucurbita moschata L.). Com o compromisso de contribuir para a redução do problema nas comunidades rurais no semiárido, a Embrapa Semiárido tem realizado estudos para a identificação de fontes ricas em carotenóides. O objetivo do presente trabalho é descrever os principais resultados obtidos com a caracterização de acessos de abóbora para características morfoagronômicas e nutricionais. Foram caracterizados 72 acessos de C. moschata do Banco Ativo de Germoplasma de Cucurbitáceas da Embrapa Semiárido, coletados em seis estados do Nordeste. O delineamento experimental utilizado foi em blocos ao acaso com três repetições, avaliando-se caracteres qualitativos e quantitativos para frutos. Os resultados evidenciaram variabilidade entre os acessos. Quatorze acessos apresentaram altos teores de carotenóides e serão utilizados na obtenção de linhagens, visando o desenvolvimento de variedades ricas em carotenóides, com ênfase em ?-caroteno