A anemia é um problema muito comum entre as crianças brasileiras1. Assim, não surpreende que a incidência de deficiência de ferro e anemia por deficiência de ferro seja consideravelmente elevada em lactentes nascidos em um hospital no estado do Rio Grande do Sul entre os 12 e os 16 meses de idade. Dos 369 lactentes que tiveram seus níveis de hemoglobina sérica mensurados no relato de Bortolini ...

O ácido fólico tem sido identificado como uma das mais importantes vitaminas para a função normal do metabolismo humano. A deficiência de ferro é um sério problema de saúde que afeta uma grande proporção da população do mundo. No Brasil, foi publicada uma regulamentação indicando que farinhas de milho e trigo devem ser fortificadas com ácido fólico e ferro. O objetivo deste trabalho foi avaliar...

A framework of ferro-magnetization on apparent weightiness, through electro-magnetic induction, is proposed in this study. Here the integral solution of ferro-magnetization, based on Boltzmann probabilistic theory in modified Bessel function, avoids unstable result accessed from traditional Langevin’s analysis. Also, a self-designed electromagnetism mechanism measuring gravitational counteracti...

The properties of lyotropic ferronematic liquid crystals based on new Ni, Cu and Zn ionic magnetic uids are discussed. The eÆciency of these new ferro uids in the lyotropic nematic liquid crystal doping is veri ed and compared with the conventional surfacted ferro uid lyotropic doping. It was observed that the structural characteristics of the lyotropics and ferro uids determine the good format...

To the Editor: A recent article in PNAS by Asikainen and Werle (1) reports on the occurrence and morphology of ferromanganese nodules found in a New Hampshire lake. The authors offer data on the shapes, banding, composition, and distribution of the nodules and crusts. They also state that my paper (2) claims that the morphology of such nodules is controlled by elemental concentrations and that ...

Measurement of the variation of relaxation frequency of Brownian rotation of magnetic nanoparticles in a ferrofluid due to binding of organic molecules is a possible tool for detection of biomolecules in solution. We investigate frequencyand temperature-dependent magnetic behavior of model ferro-fluids of surfactant-coated Co nanoparticles, 20 nm in diameter, in dichlorobenzene in a wide concen...

Using SMEAGOL, an ab initio computational method that combines the non-equilibrium Green's function formalism with density-functional theory, we calculated spin-specific electronic conduction in systems consisting of single Fen and Nin nanostructures (n = 1-4) adsorbed on a hydrogen-passivated zigzag graphene nanoribbon. For each cluster we considered both ferromagnetically and antiferromagneti...

We study bosons loaded in a one-dimensional optical lattice of twofold p-orbital degeneracy at each site. Our numerical simulations find an anti-ferro-orbital p(x)+ip(y), a homogeneous p(x) Mott-insulator phase, and two kinds of superfluid phases distinguished by the orbital order (anti-ferro-orbital and paraorbital). The anti-ferro-orbital order breaks time-reversal symmetry. Experimentally ob...

Integrated pumps and valves make up an essential part of most microfluidic devices and produce increased control in the device. Some existing micro-pumps and valves utilized in microfluidics involve electrical, pneumatic, and thermal actuation. However, electrical micro-pumps and valves generally entail a complicated and expensive fabrication process, and are limited to samples free of any ions...

Stem cell transfection agents have traditionally included lipofectamine, but newer agents include polyethyleneimine-coated magnetic ferro-ferric oxide nanoparticles. This study was done to compare these two methods in transfecting cultured ratmesenchymal stem cells. Magnetic ferro-ferric oxide nanoparticles were coated with polyethyleneimine using co-precipitation of alkali metal ions, forming ...