Search Results - "Keen, R E"

Estimation of local cerebral protein synthesis rates with L-[1-11C]leucine and PET: methods, model, and results in animals and humans by Hawkins, R A, Huang, S C, Barrio, J R, Keen, R E, Feng, D, Mazziotta, J C, Phelps, M E

“…We have estimated the cerebral protein synthesis rates (CPSR) in a series of normal human volunteers and monkeys using L-[1-11C]leucine and positron emission…”
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A model of salmonid planktivory: field test of a mechanistic approach to size-selection by Link, Jason S, Keen, Robert E

“…A mechanistic model was developed to simulate the planktivory process for the pelagic lake herring ( Coregonus artedi) on common crustacean zooplankton of Lake…”
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3-(2'-[18F]fluoroethyl)spiperone: in vivo biochemical and kinetic characterization in rodents, nonhuman primates, and humans by Barrio, J R, Satyamurthy, N, Huang, S C, Keen, R E, Nissenson, C H, Hoffman, J M, Ackermann, R F, Bahn, M M, Mazziotta, J C, Phelps, M E

“…3-(2'-[18F]fluoroethyl)spiperone (FESP), a recently developed dopamine D2-receptor binding radiopharmaceutical, was used for dynamic characterization of…”
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In vivo cerebral protein synthesis rates with leucyl-transfer RNA used as a precursor pool: determination of biochemical parameters to structure tracer kinetic models for positron emission tomography by Keen, R E, Barrio, J R, Huang, S C, Hawkins, R A, Phelps, M E

“…Leucine oxidation and incorporation into proteins were examined in the in vivo rat brain to determine rates and compartmentation of these processes for the…”
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Analysis of femtomole concentrations of alpha-ketoisocaproic acid in brain tissue by precolumn fluorescence derivatization with 4,5-dimethoxy-1,2-diaminobenzene by Keen, R E, Nissenson, C H, Barrio, J R

“…An extremely sensitive fluorimetric HPLC method used to determine in vivo cerebral alpha-ketoisocaproic acid (KIC) concentration with less than 2 g of tissue…”
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Changes in the Lake Superior Crustacean Zooplankton Community by Link, Jason, Selgeby, James H., Keen, Robert E.

“…We examined crustacean zooplankton densities at five locations in two regions of Lake Superior during a time period that spanned two decades, for three years…”
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Criteria for the tracer kinetic measurement of cerebral protein synthesis in humans with positron emission tomography by Phelps, M E, Barrio, J R, Huang, S C, Keen, R E, Chugani, H, Mazziotta, J C

“…The principles and initial results of the use of PET to measure the local cerebral metabolic rate for protein synthesis ( lCRPS ) in humans are described. The…”
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L-[1-11C]Leucine: Routine Synthesis by Enzymatic Resolution by Barrio, J. R, Keen, R. E, Ropchan, J. R, MacDonald, N. S, Baumgartner, F. J, Padgett, H. C, Phelps, M. E

“…L-[1-11C]leucine, suitable for the determination of cerebral protein synthesis rates in man using positron emission tomography, has been synthesized using a…”
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Hepatic transport of magnetic resonance imaging contrast agents. Ferrioxamine B derivatives by White, D L, Eason, R G, Alkire, A L, Price, D C, Hoener, B A, Milco, L A, Keen, R E, Barnhart, J L

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Kinetic characterization of 13NH3 and [13N]glutamine metabolism in rabbit heart by Krivokapich, J, Barrio, J R, Phelps, M E, Watanabe, C R, Keen, R E, Padgett, H C, Douglas, A, Shine, K I

“…The isolated arterially perfused rabbit interventricular septum was used to study the effects of methionine sulfoximine (MSO) on 13N-labeled ammonia (13NH3)…”
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Effects of Anoxia on Kinetics of [13N] Glutamate and 13NH3 Metabolism in Rabbit Myocardium by Krivokapich, Janine, Keen, Randy E, Phelps, Michael E, Shine, Kenneth I, Barrio, Jorge R

“…Positron emission tomography is a unique noninvasive imaging technique that provides cross-sectional images of radiotracer concentrations in myocardium and…”
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One sound or two? Object-related negativity indexes echo perception by Sanders, Lisa D, Joh, Amy S, Keen, Rachel E, Freyman, Richard L

“…The ability to isolate a single sound source among concurrent sources and reverberant energy is necessary for understanding the auditory world. The precedence…”
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Nitrogen-13 flux from L-[13N]glutamate in the isolated rabbit heart: effect of substrates and transaminase inhibition by Keen, R E, Krivokapich, J, Phelps, M E, Shine, K I, Barrio, J R

“…Kinetic and biochemical parameters of nitrogen-13 flux from L-[13N]glutamate in myocardium were examined. Tissue radioactivity kinetics and chemical analyses…”
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Characterization of organic extracts from standard reference materials 1649, 'urban dust/organics,' and 1650, 'diesel particulate matter', using a microsuspension assay. A WHO/IPCS/CSCM study by Bagley, S T, Stoltz, S L, Becker, D M, Keen, R E

“…Mutagenicity associated with replicate organic extracts from standard reference materials 1649 'urban dust/organics' (air particles), and 1650, 'diesel…”
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Continuities and discontinuities in infants' representation of objects and events by Keen, Rachel E, Berthier, Neil E

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The elusive 8-fluoroadenosine by Barrio, Jorge R., Namavari, Mohammad, Keen, Randy E., Satyamurthy, Nagichettiar

“…The synthesis of 8-fluoroadenosine has been accomplished for the first time. The kinetics of deamination of 8-fluoroadenosine with the enzyme adenosine…”
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In Vivo Binding of 18F-fluoroethyl-spiperone (FESP) to Dopamine D-2 Receptors: 11:00 AM: 3 by Mazziotta, J. C., Barrio, J. R., Satyamurthy, N., Hoffman, J. M., Huang, S-C., Bida, G. T., Keen, R. E., Hawkins, R. A., Nissenson, C. H., Phelps, M. E.

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