AIM To evaluate the ability of four clinical methods to reflect arm and hand function at impairment and activity level and to determine their ability to discriminate among SMA II patients of all ages and in all stages of the disease. METHODS Fifty-two patients with SMA II (age range: 8-73 years) were assessed by means of the Egen Klassifikation 2 (EK2 scale), the Motor Function Measure Scale ...

A new technique of magnetic imaging on a spin-stand @Mayergoyz et al., J. Appl. Phys. 87, 6824 ~2000!# is further developed and extensively tested. The results of successful imaging of digital patterns overwritten with misregistration ranging from 0.3 to 0.07 mm are reported. The results are compared with magnetic force microscopy ~MFM! images and the conclusion is reached that the spin-stand i...

Quantized magnetic disks consisting of an array of single domain Ni pillars with a density of 18 Gbits/in. were fabricated using nanoimprint lithography ~NIL! and electroplating. The total disk area, limited by the NIL mold, is 4 cm34 cm, leading to a total 45 Gbits. Magnetic force microscope ~MFM! images show that all pillars 70 nm in diameter and 400 nm in height are single domain. The magnet...

A commercial atomic force microscope/magnetic force microscope ~MFM! was modified to cool magnetic samples down to around 100 K under a high vacuum while maintaining its routine imaging functionality. MFM images of a 120 nm thick La0.7Ca0.3MnO3 film on a LaAlO3 substrate at low temperature show the paramagnetic-to-ferromagnetic phase transition. Evolution of magnetic domains and magnetic ripple...

A substantial understanding in the interaction of nanoparticles with normal and cancer cells in vitro will enable the capabilities of improving diagnostic and treatment methods in cancer research, such as imaging and targeted drug delivery. We first demonstrate the integration of a novel nanoparticle hybrid attained by the covalent attachment of IO (iron oxide, γ-Fe2O3) nanoclusters onto the su...

High-resolution magnetic imaging is of utmost importance to understand magnetism at the nanoscale. In the present work, we use a magnetic force microscope (MFM) operating under in-plane magnetic field in order to observe with high accuracy the domain configuration changes in Co nanowires as a function of the externally applied magnetic field. The main result is the quantitative evaluation of th...

Cylindrical Fe28Co67Cu5 nanowires modulated in diameter between 22 and 35 nm are synthesized by electroplating into the nanopores of alumina membranes. High-sensitivity MFM imaging (with a detection noise of 1 μN m(-1)) reveals the presence of single-domain structures in remanence with strong contrast at the ends of the nanowires, as well as at the transition regions where the diameter is modul...

We have developed the variable temperature scanning force microscope capable of performing both magnetic resonance force microscopy (MRFM) and magnetic force microscopy (MFM) measurements in the temperature range between 5 and 300 K. Modular design, large scanning area, and interferometric detection of the cantilever deflection make it a sensitive, easy to operate, and reliable instrument suita...

In this paper, we report on the magnetic properties of isolated nanoparticles and interacting nanochains formed by the self-assembly of Ni nanoparticles. The magnetic properties were studied using superconducting quantum interference device (SQUID) magnetometry and magnetic force microscopy (MFM). We demonstrate that single-domain Ni nanoparticles spontaneously form one-dimensional (1D) chains ...

Objetivo: Realizar o acompanhamento de crianças e adolescentes com Atrofia Muscular Espinhal (AME) Distrofia Duchenne (DMD) em um centro referência, por meio avaliações parâmetros respiratórios motores. Métodos: Conduziu-se 3 período 24 meses, pacientes até 15 anos, DMD AME. Avaliações respiratórias incluíram: cardiorrespiratórios, força muscular respiratória, pico fluxo tosse espirometria. Ana...