Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Mair, R. W."'
Autor:
Aptekar, J. W., Cassidy, M. C., Johnson, A. C., Barton, R. A., Lee, M. Y., Ogier, A. C., Vo, C., Anahtar, M. N., Ren, Y., Bhatia, S. N., Ramanathan, C., Cory, D. G., Hill, A. L., Mair, R. W., Rosen, M. S., Walsworth, R. L., Marcus, C. M.
Publikováno v:
ACS Nano 3, 4003 (2009)
Silicon nanoparticles are experimentally investigated as a potential hyperpolarized, targetable MRI imaging agent. Nuclear T_1 times at room temperature for a variety of Si nanoparticles are found to be remarkably long (10^2 to 10^4 s) - roughly cons
Externí odkaz:
http://arxiv.org/abs/0902.0269
The human lung and its functions are extremely sensitive to orientation and posture, and debate continues as to the role of gravity and the surrounding anatomy in determining lung function and heterogeneity of perfusion and ventilation. However, stud
Externí odkaz:
http://arxiv.org/abs/0707.3455
Nuclear magnetic resonance (NMR) experiments are described for two granular-flow systems, the vibrofluidized bed and the gas-fluidized bed. Using pulsed field gradient, magnetic resonance imaging, and hyperpolarized gas NMR, detailed information is o
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510611
In this work we present measurements of permeability, effective porosity and tortuosity on a variety of rock samples using NMR/MRI of thermal and laser-polarized gas. Permeability and effective porosity are measured simultaneously using MRI to monito
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407710
We report initial NMR studies of gas dynamics in a particle bed fluidized by laser-polarized xenon (129Xe) gas. We have made preliminary measurements of two important characteristics: gas exchange between the bubble and emulsion phases; and the gas v
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407708
Autor:
Mair, R. W., Hrovat, M. I., Patz, S., Rosen, M. S., Ruset, I. C., Topulos, G. P., Tsai, L. L., Butler, J. P., Hersman, F. W., Walsworth, R. L.
The human lung and its functions are extremely sensitive to gravity, however the conventional high-field magnets used for most laser-polarized 3He MRI of the human lung restrict subjects to lying horizontally. Imaging of human lungs using inhaled las
Externí odkaz:
http://arxiv.org/abs/physics/0403090
We report simultaneous measurements of the permeability and effective porosity of oil-reservoir rock cores using one-dimensional NMR imaging of the penetrating flow of laser-polarized xenon gas. The permeability result agrees well with industry stand
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312543
A three-dimensional granular system fluidized by vertical container vibrations was studied using pulsed field gradient (PFG) NMR coupled with one-dimensional magnetic resonance imaging (MRI). The system consisted of mustard seeds vibrated vertically
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305267
Publikováno v:
Magnetic Resonance Imaging 19, 345 (2001)
We have extended the utility of NMR as a technique to probe porous media structure over length scales of ~ 100 - 2000 micron by using the spin 1/2 noble gas 129Xe imbibed into the system's pore space. Such length scales are much greater than can be p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211184
Publikováno v:
Magnetic Resonance in Chemistry, 40, S29-S39 (2002)
We report initial NMR studies of i) xenon gas diffusion in model heterogeneous porous media, and ii) continuous flow laser-polarized xenon gas. Both areas utilize the Pulsed Gradient Spin Echo techniques in the gas-phase, with the aim of obtaining mo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211179