Search Results - "Mair, R W"

Systemic inactivation and phenotypic characterization of two‐component systems in expression of Streptococcus mutans virulence properties by Lévesque, C.M., Mair, R.W., Perry, J.A, Lau, P.C.Y., Li, Y.‐H., Cvitkovitch, D.G.

“…Aim:  To assess potential function of each two‐component signal transduction system in the expression of Streptococcus mutans virulence properties. Methods and…”
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Measuring surface-area-to-volume ratios in soft porous materials using laser-polarized xenon interphase exchange nuclear magnetic resonance by Butler, J P, Mair, R W, Hoffmann, D, Hrovat, M I, Rogers, R A, Topulos, G P, Walsworth, R L, Patz, S

“…We demonstrate a minimally invasive nuclear magnetic resonance (NMR) technique that enables determination of the surface-area-to-volume ratio (S/V) of soft…”
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Probing porous media with gas diffusion NMR by Mair, R. W., Wong, G. P., Hoffmann, D., Hurlimann, M. D., Patz, S., Schwartz, L. M., Walsworth, R. L.

“…We show that gas diffusion nuclear magnetic resonance (GD-NMR) provides a powerful technique for probing the structure of porous media. In random packs of…”
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Measurements of grain motion in a dense, three-dimensional granular fluid by Yang, Xiaoyu, Huan, Chao, Candela, D, Mair, R W, Walsworth, R L

“…We have used an NMR technique to measure the short-time, three-dimensional displacement of grains in a system of mustard seeds vibrated vertically at 15 g. The…”
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Involvement of Streptococcus mutans regulator RR11 in oxidative stress response during biofilm growth and in the development of genetic competence by Perry, J.A, Lévesque, C.M, Suntharaligam, P, Mair, R.W, Bu, M, Cline, R.T, Peterson, S.N, Cvitkovitch, D.G

“…To identify the genes regulated by RR11, the regulator of the Streptococcus mutans HK/RR11 two-component system. The S. mutans RR11-encoding gene was…”
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Tortuosity measurement and the effects of finite pulse widths on xenon gas diffusion NMR studies of porous media by Mair, R.W., Hürlimann, M.D., Sen, P.N., Schwartz, L.M., Patz, S., Walsworth, R.L.

“…We have extended the utility of NMR as a technique to probe porous media structure over length scales of ∼100–2000 μm by using the spin 1/2 noble gas 129Xe…”
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Measurement of persistence in 1D diffusion by Wong, G. P., Mair, R. W., Walsworth, R. L., Cory, D. G.

“…Using a novel NMR scheme we observed persistence in 1D gas diffusion. Analytical approximations and numerical simulations have indicated that for an initially…”
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The Narrow Pulse Approximation and Long Length Scale Determination in Xenon Gas Diffusion NMR Studies of Model Porous Media by Mair, R.W., Sen, P.N., Hürlimann, M.D., Patz, S., Cory, D.G., Walsworth, R.L.

“…We report a systematic study of xenon gas diffusion NMR in simple model porous media, random packs of mono-sized glass beads, and focus on three specific areas…”
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Low-field MRI of laser polarized noble gas by Tseng, C. H., Wong, G. P., Pomeroy, V. R., Mair, R. W., Hinton, D. P., Hoffmann, D., Stoner, R. E., Hersman, F. W., Cory, D. G., Walsworth, R. L.

“…NMR images of laser polarized 3He gas were obtained at 21 G using a simple, homebuilt instrument. At such low fields magnetic resonance imaging (MRI) of…”
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Applications of controlled-flow laser-polarized xenon gas to porous and granular media study by Mair, R.W., Wang, R., Rosen, M.S., Candela, D., Cory, D.G., Walsworth, R.L.

“…We report initial NMR studies of continuous flow laser-polarized xenon gas, both in unrestricted tubing, and in a model porous media. The study uses Pulsed…”
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NMR experiments on a three-dimensional vibrofluidized granular medium by Huan, Chao, Yang, Xiaoyu, Candela, D, Mair, R W, Walsworth, R L

“…A three-dimensional granular system fluidized by vertical container vibrations was studied using pulsed field gradient NMR coupled with one-dimensional…”
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Pulsed-Field-Gradient Measurements of Time-Dependent Gas Diffusion by Mair, Ross W., Cory, David G., Peled, Sharon, Tseng, Ching-Hua, Patz, Samuel, Walsworth, Ronald L.

“…Pulsed-field-gradient NMR techniques are demonstrated for measurements of time-dependent gas diffusion. The standard PGSE technique and variants, applied to a…”
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Diffusion NMR methods applied to xenon gas for materials study by Mair, R. W., Rosen, M. S., Wang, R., Cory, D. G., Walsworth, R. L.

“…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…”
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A System for Low Field Imaging of Laser-Polarized Noble Gas by Wong, G.P., Tseng, C.H., Pomeroy, V.R., Mair, R.W., Hinton, D.P., Hoffmann, D., Stoner, R.E., Hersman, F.W., Cory, D.G., Walsworth, R.L.

“…We describe a device for performing MRI with laser-polarized noble gas at low magnetic fields (<50 G). The system is robust, portable, inexpensive, and…”
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Single-Shot Diffusion Measurement in Laser-Polarized Gas by Peled, Sharon, Tseng, Ching-Hua, Sodickson, Aaron A., Mair, Ross W., Walsworth, Ronald L., Cory, David G.

“…A single-shot pulsed gradient stimulated echo sequence is introduced to address the challenges of diffusion measurements of laser polarized 3He and 129Xe gas…”
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Novel MRI applications of laser-polarized noble gases by Mair, R. W., Walsworth, R. L.

“…Gas-phase nuclear magnetic resonance (NMR) has great potential as a probe for a variety of interesting physical and biomedical problems that are not amenable…”
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Simultaneous measurement of rock permeability and effective porosity using laser-polarized noble gas NMR by Wang, R, Mair, R W, Rosen, M S, Cory, D G, Walsworth, R L

“…We report simultaneous measurements of the permeability and effective porosity of oil-reservoir rock cores using one-dimensional NMR imaging of the penetrating…”
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Can direct field-evaporation of doubly charged ions and post-ionisation from the singly charged state co-exist? by Ganetsos, Th, Mair, A. W. R., Mair, G. L. R., Bischoff, L., Akhmadaliev, Ch, Aidinis, C. J.

“…A tin liquid metal ion source (LMIS) containing ∼14% Pb has been studied. From a careful examination of the mass spectra of the source, it is concluded that…”
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Peptide pheromone induced cell death of Streptococcus mutans by Qi, Fengxia, Kreth, J., Lévesque, Celine M., Kay, Olga, Mair, Richard W., Shi, Wenyuan, Cvitkovitch, Dennis G., Goodman, Steven D.

“…Streptococcus mutans is considered one of the main causative agents of human dental caries. Cell–cell communication through two-component signal transduction…”
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NMR velocimetry and spectroscopy at microscopic resolution in small rheometric devices by Britton, M. M., Callaghan, P. T., Kilfoil, M. L., Mair, R. W., Owens, K. M.

“…We describe several different rheometric devices for use within the nuclear-magnetic-resonance probe of a standard widebore microimaging system. These include…”
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