منابع مشابه
SQUID Magnetometry for Cancer Screening a Feasibility Study
The recent demonstration that nanoparticles associated with various biological molecules and pharmacological agents can be administered systemically to humans, without toxicity from the particles, has opened a new era in the targeting of such particles to specific tissues in the body for the imaging and therapy of disease. The majority of particles used for this purpose contain iron and are det...
متن کاملMRI Contrast Agent: Magnetic Property Characterization by SQUID Magnetometry
Introduction Ultra-short, single-walled carbon nanotube capsules internalized with paramagnetic gadolinium-ion clusters (Gadonanotubes), see Figure 1, possess the unusual ability to cause marked shortening of both T1 and T2 (1,2). In this work we report the magnetic properties of the Gadonanotubes that underlie the significantly shortened T1 and T2 * relaxation times. Thus, the Gadonanotubes re...
متن کاملMagnetic moment degradation of nanowires in biological media: real-time monitoring with SQUID magnetometry.
Magnetic nanoparticles are used throughout biology for applications from targeted drug and gene delivery to the labeling of cells. These nanoparticles typically react with the biological medium to which they are introduced, resulting in a diminished magnetic moment. The rate at which their magnetic moment is diminished limits their utility for targeting and can signal the unintended release of ...
متن کاملSQUID magnetometry as a tool for following a clock reaction in solution.
SQUID magnetometry, normally used to characterise the properties of solids, was used to follow a clock reaction in solution, namely the auto-catalytic oxidation of [Co(II)EDTA]2- by H2O2, in real time and it was shown that, in combination with other methods (e.g., magnetic resonance proton relaxation studies and UV-vis absorption analysis), SQUID magnetometry can be a powerful method in elucida...
متن کاملDetection of Magnetic moments using a NanoSQUID : Limits of resolution and sensitivity in near-field SQUID magnetometry
We investigate the coupling efficiency of a localized magnetic moment placed at a distance z from a DC-SQUID magnetometer of loop radius a with nanobridges of cross section r . Using simple magnetostatic considerations, we show that there exist two detection regimes: the usual far-field regime (z a) for which inductive coupling is achieved by the entire loop and a near-field regime (z ≪ a) wher...
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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2002
ISSN: 1678-2690,0001-3765
DOI: 10.1590/s0001-37652002000300036