Carl D. Gregory

  • Citations Per Year
Learn More
Exercise-induced decreases in the (1)H transverse relaxation rate (R(2)) of muscle have been well documented, but the mechanism remains unclear. In this study, the hypothesis was tested that R(2) decreases could be explained by pH decreases and apparent intracellular volume (V(i)') increases. (31)P and (1)H spectroscopy, biexponential R(2) analysis, and(More)
In 1H NMR spectroscopic studies of fatiguing skeletal muscles, two peaks consistently arise near 1.3 ppm, typically 15-20 Hz apart at 300 MHz. From a variety of NMR and biochemical evidence, both peaks are identified as lactate. Both the CH3 and CH protons of lactate experience the same shift in intact muscle; this rules out chemical bonding or(More)
The authors ask the question whether the parameters “number” and “volume” are suitable for the morphometric analysis of mitochondria. In several types of cell, irregularity of mitochondrial shape makes it technically difficult, if not impossible, to obtain reliable stereological estimates of mean organelle volume or number per unit volume. Of more(More)
Quantitative magnetic resonance imaging of lactate using a zero-quantum/double-quantum filter and generalized spectral localization by imaging (GSLIM) was applied to a model of unilateral stroke in gerbil brain. GSLIM lactate images at 4T clearly reveal elevated concentrations of lactate in the ischemic compared with the normal hemisphere 100-175 minutes(More)
The standard model for the origin of galactic magnetic fields is through the amplification of seed fields via dynamo or turbulent processes to the level consistent with present observations. Although other mechanisms may also operate, currents from misaligned pressure and temperature gradients (the Biermann battery process) inevitably accompany the(More)
We investigated the time evolution of a strong collisionless shock in counterstreaming plasmas produced using a high-power laser pulse. The counterstreaming plasmas were generated by irradiating a CH double-plane target with the laser. In self-emission streaked optical pyrometry data, steepening of the self-emission profile as the two-plasma interaction(More)
Magnetic resonance imaging and spectroscopy techniques are now being used to detect changes in blood flow, volume and oxygenation level associated with brain function. In this paper, we describe a prototype system, called a Neuroscope, that provides a real-time acquisition, control and processing environment for functional brain studies. Preliminary(More)
J. S. GREEN1,2, K. L. LANCASTER1, K. U. AKLI3,4, C. D. GREGORY5, F. N. BEG6, S. N. CHEN6, D. CLARK7, R. R. FREEMAN7, S. HAWKES1, C. HERNANDEZ-GOMEZ1, H. HABARA8, R. HEATHCOTE1, D. S. HEY3,4, K. HIGHBARGER7, M. H. KEY3, R. KODAMA8,9, K. KRUSHELNICK10, I. MUSGRAVE1, H. NAKAMURA9, M. NAKATSUTSUMI8, N. PATEL4, R. STEPHENS11, M. STORM12, M. TAMPO9, W.(More)