Desenvolvimento de metodologia para detecção simultânea de organismo geneticamente modificado e de patógenos em extrato hidrossolúvel de soja.

bitstream/item/83118/1/2012-310.pd

Desenvolvimento de metodologia para detecção simultânea de organismo geneticamente modificado e de patógenos em extrato hidrossolúvel de soja.

bitstream/item/75059/1/pub-130.pd

Quality assessment of soy milk: RR® event traceability, detection of Salmonella enteritidis and sensory analysis.

The objective of this work was to produce hydrosoluble soybean extract ? soy milk, through the processing of organic, conventional and transgenic ? RR® soybeans and to evaluate the analysis sensory affective of product, the RR® traceability and the microbiological quality through the technique of q-PCR SYBR Green®

Avaliação do Método MSRV (Draft Annex D/ISO 6579:2002) para detecção de Salmonella spp em farelo de soja.

bitstream/item/74869/1/pub-147.pd

Scanning Tunneling Microscope Operating as a Spin-diode

We theoretically investigate spin-polarized transport in a system composed of a ferromagnetic Scanning Tunneling Microscope (STM) tip coupled to an adsorbed atom (adatom) on a host surface. Electrons can tunnel directly from the tip to the surface or via the adatom. Since the tip is ferromagnetic and the host surface (metal or semiconductor) is non-magnetic we obtain a spin-diode effect when the adatom is in the regime of single occupancy. This effect leads to an unpolarized current for direct bias (V > 0) and polarized current for reverse (V < 0) bias voltages, if the tip is nearby the adatom. Within the nonequilibrium Keldysh technique we analyze the interplay between the lateral displacement of the tip and the intra adatom Coulomb interaction on the spindiode effect. As the tip moves away from the adatom the spin-diode effect vanishes and the currents become polarized for both V > 0 and V < 0. We also find an imbalance between the up and down spin populations in the adatom, which can be tuned by the tip position and the bias. Finally, due to the presence of the adsorbate on the surface, we observe spin-resolved Friedel oscillations in the current, which reflects the oscillations in the calculated LDOS of the subsystem surface+adatom.Comment: 11 pages, 4 figures. Submitte