نتایج جستجو برای: surface nmr signal
تعداد نتایج: 1078099 فیلتر نتایج به سال:
We have recently proposed the concept of soft N-modular redundancy (soft NMR) [1] in order to design robust and energy-efficient computing systems in nanoscale processes, where soft NMR was shown to achieve orders-of-magnitude improvement in robustness with significant power savings over NMR. In this paper, we analyze the performance of soft NMR and compare it with that of NMR and algorithmic n...
I will derive the NMR-AFP lineshape, specify the parameters that define the signal size, set up the equations to calculate the flux, and derive the water signal lineshape.
We explore the possibility for elemental analysis by NMR. To keep the efficiency of the signal acquisition common for all spin species, we propose to fix the frequency and vary the magnetic field to cover the isotopes involved in a sample. We introduce constant-frequency receptivity for quantitative elemental analysis in the frequency-fixed NMR experiment. Field-variable NMR experiments are dem...
The first in vivo nuclear magnetic resonance (NMR) images of tissue sodium in the intact animal are presented. The distribution of sodium in the normal cat's head is described. An experimental stroke was surgically induced. Sodium NMR imaging showed a pronounced focal increase in cerebral sodium concentration 9 hr after ligation of the middle cerebral artery. The method appears to be very sensi...
The depth of insertion of an antimicrobial peptide, protegrin-1 (PG-1), in lipid bilayers is investigated using solid-state NMR. Paramagnetic Mn(2+) ions bind to the surface of lipid bilayers and induce distance-dependent dipolar relaxation of nuclear spins. By comparing the signal dephasing of the peptide with that of the lipids, whose segmental depths of insertion are known, we determined the...
The changes in signal intensity of micro-PET and micro-MRI images of tumors were characterized using histology, »flow cytometry, DNA fragmentation analysis and NMR peaks. This approach was used to assay the chemotherapeutic efficacy based on FDG and intracellular(IC) sodium changes in tumor. A detailed methodology is presented for PC-3 tumor progression. The logic is presented for signal intens...
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