Relevant bibliographies by topics / Tracer studies

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Tracer studies'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Tracer studies"

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Cobelli, C., G. Toffolo, D. M. Bier, and R. Nosadini. "Models to interpret kinetic data in stable isotope tracer studies." American Journal of Physiology-Endocrinology and Metabolism 253, no. 5 (1987): E551—E564. http://dx.doi.org/10.1152/ajpendo.1987.253.5.e551.

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In contrast to "weightless" radioactive tracers, stable isotope tracers have nonnegligible mass and are naturally present in the system, and the measured variable is a ratio of two isotopic species. These features do not allow stable isotopic tracer data analysis using straightforward analogy with radioactive tracer approaches, even though this practice is common. In this study, we present kinetic variables, models, and measurements for the analysis and interpretation of stable isotope tracer data. Assumptions and mathematical techniques for modeling the data when perturbation is both nonnegligible and negligible are discussed. Emphasis is placed on the rich information content of the dynamic portion of a stable isotope tracer curve and on the role of compartmental and noncompartmental modeling approaches for its interpretation. A presumed and commonly used analogy between the radioactive specific activity and stable isotopic enrichment is shown to be incorrect. We show that the proper analogue of specific activity is the tracer-to-tracee molar ratio. This variable is not a directly measurable one, but a formula is derived that allows its computation from the data. A method for reconstructing the time course in blood of the concentration component due to endogenous synthesis is presented. This allows measurement of the extent of the perturbation in the case where a nonweightless tracer is used. Special attention is given to data analysis originating from a multiple tracer experiment, a configuration necessary for studying more complex systems, e.g., the kinetics of interacting substrates.
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Koeppe, Robert A., David M. Raffel, Scott E. Snyder, Edward P. Ficaro, Michael R. Kilbourn, and David E. Kuhl. "Dual-[11C]Tracer Single-Acquisition Positron Emission Tomography Studies." Journal of Cerebral Blood Flow & Metabolism 21, no. 12 (2001): 1480–92. http://dx.doi.org/10.1097/00004647-200112000-00013.

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The ability to study multiple physiologic processes of the brain simultaneously within the same subject would provide a new means to explore the interactions between neurotransmitter systems in vivo. Currently, examination of two distinct neuropharmacologic measures with positron emission tomography (PET) necessitates performing two separate scans spaced in time to allow for radionuclide decay. The authors present results from a dual-tracer PET study protocol using a single dynamic-scan acquisition where the injections of two tracers are offset by several minutes. Kinetic analysis is used to estimate neuropharmacologic parameters for both tracers simultaneously using a combined compartmental model configuration. This approach results in a large reduction in total study time of nearly 2 hours for carbon-11–labeled tracers. As multiple neuropharmacologic measures are obtained at nearly the same time, interventional protocols involving a pair of dual-tracer scans become feasible in a single PET session. Both computer simulations and actual human PET studies were performed using combinations of three different tracers: [11C]flumazenil, N-[11C]methylpiperidinyl propionate, and [11C]dihydrotetrabenazine. Computer simulations of tracer-injection separations of 10 to 30 minutes showed the feasibility of the approach for separations down to 15 to 20 minutes or less. Dual-tracer PET studies were performed in 32 healthy volunteers using injection separations of 10, 15, or 20 minutes. Model parameter estimates for each tracer were similar to those obtained from previously performed single-injection studies. Voxel-by-voxel parametric images were of good quality for injections spaced by 20 minutes and were nearly as good for 15-minute separations, but were degraded noticeably for some model parameters when injections were spaced by only 10 minutes. The authors conclude that dual-tracer single-scan PET is feasible, yields accurate estimates of multiple neuropharmacologic measures, and can be implemented with a number of different radiotracer pairs.
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Romijn, J. A., D. L. Chinkes, J. M. Schwarz, and R. R. Wolfe. "Lactate-pyruvate interconversion in blood: implications for in vivo tracer studies." American Journal of Physiology-Endocrinology and Metabolism 266, no. 3 (1994): E334—E340. http://dx.doi.org/10.1152/ajpendo.1994.266.3.e334.

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We have evaluated lactate and pyruvate kinetics in whole blood or plasma by the addition of [1-13C]lactate (n = 5) or [1-13C]pyruvate (n = 5) and application of compartmental modeling to the resulting data. Pyruvate and lactate concentrations and tracer-to-tracee ratios were measured at frequent intervals for 45 min. Pyruvate and lactate tracer-to-tracee ratios equilibrated almost completely within 3-4 min in whole blood, whereas there was no isotopic exchange in plasma. The average rate of interconversion between unlabeled lactate and pyruvate was four to five times (pyruvate to lactate) and three to four times (lactate to pyruvate) the net production rate of lactate. We conclude that there is a very rapid interconversion between lactate and pyruvate in blood that has to be considered in the interpretation of in vivo tracer studies.
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Minchin, Peter E. H., and Michael R. Thorpe. "Using the short-lived isotope 11C in mechanistic studies of photosynthate transport." Functional Plant Biology 30, no. 8 (2003): 831. http://dx.doi.org/10.1071/fp03008.

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Tracer techniques have been central in studies of transport in plants. In the case of carbon, the only readily available radioactive tracer has been 14C, although 11C was used for a short time before 14C could be made. Tracers have usually had to be measured by destructive harvesting of the plant, giving a practical limit to the data resolution in both time and space. A major advantage of the short-lived, positron-emitting tracers, of which 11C is one example, is that in vivo measurement is possible, giving detailed time series of tracer data in many locations and opening up powerful new techniques of data analysis. Medical applications of these isotopes have utilised both dynamic imaging and time courses of uptake or washout. Unfortunately, few plant biology laboratories have realised the potential of these techniques, possibly because of the large physics infrastructure needed. In this paper we review the concepts behind the use of these short-lived tracers in plant physiology, and illustrate with several cases where 11C was an essential tool.
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Jensen, M. D., P. J. Rogers, M. G. Ellman, and J. M. Miles. "Choice of infusion-sampling mode for tracer studies of free fatty acid metabolism." American Journal of Physiology-Endocrinology and Metabolism 254, no. 5 (1988): E562—E565. http://dx.doi.org/10.1152/ajpendo.1988.254.5.e562.

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To determine the preferred infusion-sampling mode for isotopic studies of free fatty acid (FFA) metabolism, tracer [( 14C]palmitate) was infused into the left ventricle of five anesthetized dogs, and tracee ([3H]palmitate) was infused into three separate peripheral veins of each dog. The [14C]palmitate specific activity (SA) was lower in mixed venous than arterial blood, and [3H]palmitate SA was equal in both sites. The actual infusion rate of [3H]palmitate [2.15 +/- 0.31 X 10(5) disintegrations/min (dpm).kg-1.min-1] could be accurately predicted (2.14 +/- 0.32 X 10(5) dpm.kg-1.min-1) using the known [14C]palmitate infusion rate and the arterial plasma [14C]-to-[3H]palmitate ratio. In contrast, the mixed venous [14C]-to-[3H]palmitate ratio resulted in overestimates (P less than 0.05) of the actual [3H]palmitate infusion rate. In summary, venous tracer infusion with arterial blood sampling for FFA tracer studies provides the most accurate estimates of tracee rate of appearance.
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Cobelli, C., and G. Toffolo. "Constant specific activity input allows reconstruction of endogenous glucose concentration in non-steady state." American Journal of Physiology-Endocrinology and Metabolism 258, no. 6 (1990): E1037—E1040. http://dx.doi.org/10.1152/ajpendo.1990.258.6.e1037.

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In vivo studies on the glucose system often require its perturbation by an exogenous input of glucose, whereas glucose turnover is assessed by infusing a glucose tracer. The constant infusion represents the usual format of tracer administration, but it has no clear advantage other than simplicity. Here we propose a different tracer infusion format. It consists of infusing the tracer in parallel with unlabeled glucose so as to maintain a constant specific activity in the infusate. This protocol does not increase experimental complexity and provides new information on the glucose system in non-steady state by allowing reconstruction of the endogenous component of glucose concentration. This reconstruction only requires very general assumptions, such as tracer-tracee indistinguishability and mass conservation; in particular it is independent of the glucose model structure, i.e., number of compartments and their interconnections. A proof of the result is given for a general nonlinear model of the glucose system. The constant specific activity input is also advantageous for non-steady-state calculations, because it reduces the variation in the measured plasma glucose specific activity. The glucose system has served as the prototype, but the protocol is applicable to other blood-borne substances. The radioactive tracer case has been considered, but the same results apply to stable isotope tracers as well; in this case they also become relevant in a somewhat different context, i.e., kinetic studies in steady state.
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McCarthy, I. D., and S. P. Hughes. "Multiple tracer studies of bone uptake of 99mTc-MDP and 85Sr." American Journal of Physiology-Heart and Circulatory Physiology 256, no. 5 (1989): H1261—H1265. http://dx.doi.org/10.1152/ajpheart.1989.256.5.h1261.

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Multiple tracer outflow dilution studies were performed on the normal canine tibia. In all cases 125I-labeled albumin was used as a vascular tracer. In one series of experiments 99mTc-labeled methylene diphosphonate and [14C]sucrose were used as test tracers, and in a second series 85Sr and 22Na were used. A bolus of three tracers was injected into the tibial nutrient artery, and fractional concentrations appearing in the ipsilateral femoral vein were measured for a period of 5 min. A distributed model, containing parameters for capillary and bone permeability and apparent volumes of distribution of interstitial fluid, was fitted to these data. It was found that there was no discrimination between movement of 85Sr or 22Na from interstitial fluid space into bone. Transcapillary exchange does not appear to be a significant barrier to exchange between blood and bone surfaces.
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Broughton, Alistair, and Andy Shilton. "Tracer studies on an aerated lagoon." Water Science and Technology 65, no. 4 (2012): 611–17. http://dx.doi.org/10.2166/wst.2012.906.

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The city of Palmerston North, New Zealand, has two aerated lagoons as its secondary treatment facility. Interest about treatment efficiency led to an investigation into the hydraulics in the second lagoon to determine if further optimisation was viable. A tracer study using rhodamine WT was undertaken to ascertain the stimulus response output. Samples were also taken at 24 points within the lagoon to determine the tracer concentration profile throughout the lagoon. The mean residence time was determined to be 39.9 h compared with a theoretical residence time of 55.4 h. Peak concentration of the tracer at the outlet occurred at 0.44 of the mean residence time. The results of the tracer study pointed to 28% of volume being dead space. A subsequent sludge survey indicated that 26% of the design volume of the lagoon was filled with sludge. While the curved geometry of the lagoon did not appear to impact the hydraulics the fact that the first aerator is confined in a relatively smaller area will have locally boosted the mixing energy input in this inlet zone. From interpretation of the tracer response and the tracer distribution profiles it appears that the aerators are mixing the influent into the bulk flow effectively in the front end of the lagoon and that there was no evidence of any substantive short-circuiting path of concentrated tracer around to the outlet. The tracer distribution profiles gave direct insight as to how the tracer was being transported within the pond and should be used more often when conducting tracer studies. Comparison with the literature indicated that the lagoon's hydraulic efficiency was on par with a baffled pond system and it would be expected that addition of several baffles to the lagoon would provide minimal further improvement.
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Luca, Liliana, Stefan Ghimişi, and Iulian Popescu. "Studies Regarding the Movement on the Cochleoid." Advanced Materials Research 463-464 (February 2012): 147–50. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.147.

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There are given details about the cochleoid geometry and there are traced, based on equations, different areas of cochleoid, based on a supporting mechanism. They are shown the laws of variation of the curvature radius and of the tracer point coordinates. It is studied the material point movement on the cochleoid and there are presented relationships and diagrams for speeds and accelerations.
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Joshi, Aniket D., Robert A. Koeppe, Jeffrey A. Fessier, and Michael R. Kilbourn. "Signal Separation and Parameter Estimation in Noninvasive Dual-Tracer PET Scans using Reference-Region Approaches." Journal of Cerebral Blood Flow & Metabolism 29, no. 7 (2009): 1346–57. http://dx.doi.org/10.1038/jcbfm.2009.53.

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This is the first study to report results from a noninvasive dual-tracer positron emission tomography (PET) in humans not requiring arterial sampling, in which two radiotracers were injected closely in time within the same scan. These studies yield near simultaneous information on two different neuropharmacological systems, providing better characterization of a subject's neurologic condition. The noninvasive dual-tracer approach described in this study is based on the primary assumption that an appropriate bolus plus constant infusion protocol brings the reference tissue of the first radiotracer to steady state before injection of the second tracer. Two methods for separation of time-activity curves (TACs) and parameter estimation were investigated, namely (1) an extrapolation method, in which TACs of the first tracer were extrapolated over total scan duration followed by subtraction from dual-tracer TACs and (2) a simultaneous fitting method, in which reference-region models for both tracers were fitted simultaneously to dual-tracer TACs. Combinations of two reversible tracers ([11C]flumazenil and [11C]dihydrotetrabenazine) or one reversible and one irreversible tracer ([11C] N-methylpiperidinyl propionate) were used. After the dual-tracer scan, a single-tracer (ST) scan using one of the tracers was obtained for comparison of the dual-tracer results. Both approaches provided parameter estimates with intersubject regions-of-interest means typically within 10% of those obtained from ST scans without an appreciable increase in variance.
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Dissertations / Theses on the topic "Tracer studies"

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Sharratt, Andrew Paul. "Silica supported nickel catalysts : tracer studies." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843407/.

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A series of silica supported catalysts were prepared by impregnation of the support materials with a nickel(II) nitrate precursor under standard conditions. The catalysts and silicas were characterised using temperature programmed reduction (TPR) techniques, neutron diffraction, small angle neutron scattering, and 29Si magic angle spinning nuclear magnetic resonance (MAS-NMR). These analyses revealed one significant variable in the silicas:- the surface concentration of strained siloxane rings containing three silicon atoms. The catalysts were tested using ethene as a probe molecule and the amination of ethanol as a test reaction in conjunction with various tracers (2H, 3H, 13C and 15N). Significant differences in behaviour and activity were observed, these differences correlated with the surface concentration of the strained three membered rings. Possible interactions between reactants and the rings were proposed to explain the observed differences in behaviour. Based on the tracer studies it was possible to propose a mechanism for the animation reaction over the catalysts. The role of the silica surfaces in influencing the activity of the catalysts was illustrated in terms of the proposed reaction mechanism.
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Leo, Timothy Patrick 1961. "Computer studies of heat tracer experiments in fractured rock." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191982.

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The computer model PT is used to analyze a three-corehole recirculation heat tracer test conducted in a fractured granitic rock mass near Oracle, Arizona. Results of hydraulic tests and geophysical logs are cross-correlated =o determine the location, orientation and thickness of a high permeability fault zone, in which flow between the potencies during the heat tracer test is believed to occur. A quasi-three-dimensional model of fluid flow and heat transport in the fault zone is used to qualitatively reproduce a steep rise in measured temperature within a monitoring borehole. Computed thermal breakthroughs are found to be sensitive to two numerical grid parameters-- Thickness and width. A grid thickness of 1.0 cm and a grid width of 0.7 m are sufficient to qualitatively reproduce the steep temperature increase. Further research into the importance of heat convection under static conditions during the test is recommended.
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Price, C. S. "Tracer studies of pollutant dispersion in the urban atmosphere." Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525828.

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Suksi, Juhani. "Natural uranium as a tracer in radionuclide geosphere transport studies." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/suksi/.

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Mehta, Neha Ph D. Massachusetts Institute of Technology. "Radium cycling in groundwater : implications for bioremediation and tracer studies." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121704.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: Ph. D. in Environmental Engineering, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2019<br>Cataloged from student-submitted PDF version of thesis. Page 133 blank.<br>Includes bibliographical references.<br>Radium (Ra) is a radioactive alkaline earth element and forms naturally from the decay of uranium (U) and thorium (Th), elements that are ubiquitous within most rocks, soils and sediments. Radium contamination associated with anthropogenic activities such as hydraulic fracturing, uranium mining, and nuclear waste disposal poses significant public and ecological health risks. While occurrence of Ra in groundwater is concerning for public health and safety reasons, Ra is also a powerful tracer for calculating groundwater discharge and pollutant loading to coastal water. In this thesis, I investigate processes controlling Ra mobility in groundwater that are important for developing remediation strategies and improving our understanding of Ra tracer applications.<br>In first section of this thesis, I use a novel closed loop flow-through system to measure recoil-derived fluxes of Ra and other daughter nuclides from two crushed rock types with disparate physical and geochemical characteristics. Next, I model the effect of alpha recoil on fractionation of Ra isotopes in groundwater. Our findings showed that alpha-recoil process drives the widespread variability in Ra isotopes observed numerous field measurements and highlight the importance of understanding the hydrology of a groundwater flow system prior to interpreting Ra activities. In the second section of this thesis, I experimentally studied geochemical controls on processes affecting Ra and metal mobility in shale-water system. The results elucidate role of pH, ionic strength and additive in fracture fluid on Ra mobility in produced water. The findings from this work illuminated processes responsible for retention and mobilization of Ra and potentially problematic solutes in the subsurface.<br>In the last section of this thesis, the role of biomineralization on Ra uptake from solution by the cyanobacteria species Candidatus gleomargarita lithophora was investigated. Our results showed that G. lithophora grew normally in presence of Ra and sequestered 99% of the total aqueous Ra over this time period within biomass and biominerals. The findings suggest that under certain conditions, biomineralization of Ra could be used to develop in-situ bioremediation schemes for removal of Ra in groundwater and contaminated effluent streams.<br>by Neha Mehta.<br>Ph. D. in Environmental Engineering<br>Ph.D.inEnvironmentalEngineering Massachusetts Institute of Technology, Department of Civil and Environmental Engineering
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Byrén, Lars. "Deposit-feeding in benthic macrofauna : Tracer studies from the Baltic Sea." Doctoral thesis, Stockholm University, Department of Systems Ecology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62.

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<p>A low content of organic matter, which is largely refractory in nature, is characteristic of most sediments, meaning that aquatic deposit-feeders live on a very poor food source. The food is derived mainly from sedimenting phytodetritus, and in temperate waters like the Baltic Sea, from seasonal phytoplankton blooms. Deposit-feeders are either bulk-feeders, or selective feeders, which preferentially ingest the more organic-rich particles in the sediment, including phytodetritus, microbes and meiofauna.</p><p>The soft-bottom benthos of the Baltic Sea has low species biodiversity and is dominated by a few macrobenthic species, among which the most numerous are the two deposit-feeding amphipods <i>Monoporeia affinis</i> and<i> Pontoporeia femorata</i>, and the bivalve <i>Macoma balthica</i>. This thesis is based on laboratory experiments on the feeding of these three species, and on the priapulid <i>Halicryptus spinulosus.</i> </p><p>Feeding by benthic animals is often difficult to observe, but can be effectively studied by the use of tracers. Here we used the radioactive isotope <sup>14</sup>C to label food items and to trace the organic matter uptake in the animals, while the stable isotopes <sup>13</sup>C and<sup> 15</sup>N were used to follow feeding on aged organic matter in the sediment. </p><p>The abundance of<i> M. balthica</i> and the amphipods tends to be negatively correlated, i.e., fewer bivalves are found at sites with dense populations of amphipods, with the known explanation that newly settled <i>M. balthica</i> spat are killed by the amphipods. Whether the postlarvae are just accidentally killed, or also ingested after being killed was tested by labelling the postlarvae with <sup>14</sup>C and Rhodamine B. Both tracer techniques gave similar evidence for predation on and ingestion of postlarval bivalves. We calculated that this predation was likely to supply less than one percent of the daily carbon requirement for <i>M. affinis</i>, but might nevertheless be an important factor limiting recruitment of <i>M. balthica. </i></p><p>The two amphipods <i>M. affinis</i> and <i>P. femorata </i>are partly vertically segregated in the sediment, but whether they also feed at different depths was unknown. By adding fresh 14C-labelled algae either on the sediment surface or mixed into the sediment, we were able to distinguish surface from subsurface feeding. We found <i>M. affinis</i> and <i>P. femorata</i> to be surface and subsurface deposit-feeders, respectively. </p><p>Whether the amphipods also feed on old organic matter, was studied by adding fresh <sup>14</sup>C-labelled algae on the sediment surface, and using aged, one-year-old <sup>13</sup>C- and <sup>15</sup>N-labelled sediment as deep sediment. Ingestion of old organic matter, traced by the stable isotopes, differed between the two species, with a higher uptake for <i>P. femorata</i>, suggesting that <i>P. femorata</i> utilises the older, deeper-buried organic matter to a greater extent.</p><p>Feeding studies with juveniles of both <i>M. affinis</i> and <i>P. femorata</i> had not been done previously. In an experiment with the same procedure and treatments as for the adults, juveniles of both amphipod species were found to have similar feeding strategies. They fed on both fresh and old sediment, with no partitioning of food resources, making them likely to be competitors for the same food resource. </p><p>Oxygen deficiency has become more wide-spread in the Baltic Sea proper in the last half-century, and upwards of 70 000km<sup>2</sup> are now devoid of macrofauna, even though part of that area does not have oxygen concentrations low enough to directly kill the macrofauna. We made week-long experiments on the rate of feeding on <sup>14</sup>C-labelled diatoms spread on the sediment surface in different oxygen concentrations for both the amphipod species, <i>M. balthica</i> and <i>H. spinulosus. </i>The amphipods were the most sensitive to oxygen deficiency and showed reduced feeding and lower survival at low oxygen concentrations.<i> M. balthica</i> showed reduced feeding at the lowest oxygen concentration, but no mortality increase. The survival of <i>H. spinulosus</i> was unaffected, but it did not feed, showing that it is not a surface deposit-feeder. We conclude that low oxygen concentrations that are not directly lethal, but reduce food intake, may lead to starvation and death in the longer term.</p>
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Byrén, Lars. "Deposit-feeding in benthic macrofauna : tracer studies from the Baltic Sea /." Stockholm : Institutionen för systemekologi, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62.

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Sutton, David G. M. "Stable isotope tracer studies for the measurement of equine gastrointestinal motility." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422249.

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Aravindhan, Karpagam Jucker Beat M. DiNardo N. John. "Assessing the effects of LXR agonists in cholesterol handling: stable isotope tracer studies /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/613.

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Cline, David James 1956. "Tracer experiments using bromide ion and two bacteriophages during soil aquifer treatment studies." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278114.

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The fate and transport of a conservative and two bacteriophage tracers during Soil Aquifer Treatment (SAT) has been examined. A 12 foot x 12 foot mini-basin containing seven stainless steel suction samplers ranging in depth from 1 to 20 feet below land surface was constructed in an existing recharge basin. Bromide ion and MS-2 and PRD-1 virus tracers were introduced into the mini-basin during recharge of secondary effluent during three of nine flooding cycles in order to aid in interpreting transport processes and to determine the presence of preferred-flow channels. High infiltration rates and discontinuous impeding layers resulted in 150 feet of horizontal transport. Preferential-flow channels were observed in both the vertical and horizontal directions. Less removal of bacteriophage MS-2 (hydrophilic, 28 nm dia) was observed at all depths compared to PRD-1 (hydrophobic, 62 nm dia). Results suggest that the fate of the virus transport in sandy alluvium is determined by the size and hydrophobicity of the viral particles, the quality of the percolating fluid, and composition of the soils.
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Books on the topic "Tracer studies"

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Kachi, S. Tracer studies of the chalk aquifer near Cambridge. University of East Anglia, 1987.

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Teefy, Susan. Tracer studies in water treatment facilities: A protocol and case studies. AWWA Research Foundation and American Water Works Association, 1996.

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Baskaran, Mark. Radon: A Tracer for Geological, Geophysical and Geochemical Studies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21329-3.

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Stith, Jeffrey Len. Tracer studies of transport and transformation in cumuli: Project summary. U.S. Environmental Protection Agency, National Exposure Research Laboratory, 1995.

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Ward, Robert S. Artificial tracer and natural 222Rn studies of the East Anglian chalk aquifer. University of East Anglia, 1989.

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Vinne, G. Van Der. Winter tracer dye studies on the North Saskatchewan River, Edmonton to Saskatchewan border. Environmental Research and Engineering Dept., Alberta Research Council, 1991.

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Tracer studies in a quest for academic improvement: The process and results of a University-Wide Tracer Study Project conducted in 2002-2003. Dar es Salaam University Press, 2004.

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Vinne, G. Van Der. Winter low flow tracer dye studies, Athabasca River, Athabasca to Bitumount, February and March, 1992. The Study, 1993.

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Haggerty, Roy. Application of the multirate diffusion approach in tracer test studies at Äspö HRL: Final report. SKB, 1999.

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Vinne, G. Van Der. Low flow, open water tracer dye studies on the North Saskatchewan River, Edmonton to Saskatchewan border. Environmental Research and Engineering Dept., Alberta Research Council, 1991.

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Book chapters on the topic "Tracer studies"

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Kilner, J. A., R. J. Chater, and P. L. F. Hemment. "Isotope Tracer Studies Using SIMS." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82724-2_89.

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Dueker, Stephen R., A. Daniel Jones, and Andrew J. Clifford. "Protocol Development for Biological Tracer Studies." In Advances in Experimental Medicine and Biology. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4899-1959-5_23.

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Engesgaard, Peter, Dorte Seifert, and Paulo Herrera. "Bioclogging in Porous Media: Tracer Studies." In Nato Science Series: IV: Earth and Environmental Sciences. Springer Netherlands, 2006. http://dx.doi.org/10.1007/978-1-4020-3938-6_5.

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Baskaran, Mark. "Radon: A Tracer for Atmospheric Studies." In Radon: A Tracer for Geological, Geophysical and Geochemical Studies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21329-3_4.

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Leenders, K. L. "Parkinson’s disease and PET tracer studies." In Continuous Dopaminergic Stimulation in Parkinson’s Disease. Springer Vienna, 1988. http://dx.doi.org/10.1007/978-3-7091-8954-2_19.

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Baskaran, Mark. "Radon as a Tracer for Earthquake Studies." In Radon: A Tracer for Geological, Geophysical and Geochemical Studies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21329-3_10.

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Schlosser, P., B. Ekwurzel, S. Khatiwala, B. Newton, W. Maslowski, and S. Pfirman. "Tracer Studies of the Arctic Freshwater Budget." In The Freshwater Budget of the Arctic Ocean. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4132-1_19.

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Liehn, J. C., A. Venot, and J. F. Lebruchec. "A New Approach to Double Tracer Studies." In Information Processing in Medical Imaging. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-009-4261-5_21.

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Baskaran, Mark. "Radon: A Tracer for Geochemical Exploration." In Radon: A Tracer for Geological, Geophysical and Geochemical Studies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21329-3_9.

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Barrio, Jorge R., Randy E. Keen, Diane C. Chugani, Gerald Bida, Nagichettiar Satyamurthy, and Michael E. Phelps. "Concepts and Techniques Used in Metabolic Tracer Studies." In Analytical and Chromatographic Techniques in Radiopharmaceutical Chemistry. Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4612-4854-5_10.

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Conference papers on the topic "Tracer studies"

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Ellis, Erika S., Dmitry Kosynkin, and Mohammad N. Askar. "Transforming Oil Tracer Studies." In SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/182773-ms.

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Pruszak, Zbigniew, Ryszard Wierzchnicki, Andrzej Owczarczyk, and Ryszard B. Zeidler. "Nearbed Sediment Concentration from Tracer Studies." In 25th International Conference on Coastal Engineering. American Society of Civil Engineers, 1997. http://dx.doi.org/10.1061/9780784402429.301.

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Yiping Shao, Rutao Yao, Tianyu Ma, and Phani Manchiraju. "Initial studies of PET-SPECT dual-tracer imaging." In 2007 IEEE Nuclear Science Symposium Conference Record. IEEE, 2007. http://dx.doi.org/10.1109/nssmic.2007.4437043.

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Widemann, Baltasar Trancon y., and Christina Bogner. "Image analysis for soil dye tracer infiltration studies." In 2012 3rd International Conference on Image Processing Theory, Tools and Applications (IPTA). IEEE, 2012. http://dx.doi.org/10.1109/ipta.2012.6469517.

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Panguluri, Srinivas, Y. Jeffery Yang, Roy C. Haught, Robert M. Clark, E. Radha Krishnan, and Donald A. Schupp. "Tracer Dispersion Studies for Hydraulic Characterization of Pipes." In World Environmental and Water Resources Congress 2007. American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40927(243)501.

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Tiutiaev, Andrei, Georgy Mozgovoy, and Evgeny Biktimirkin. "STUDING THE POSSIBILITIES OF PHOSPHORS USING IN TRACER STUDIES OF OIL WELLS." In 20th SGEM International Multidisciplinary Scientific GeoConference Proceedings 2020. STEF92 Technology, 2020. http://dx.doi.org/10.5593/sgem2020/1.1/s02.091.

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Bian, Xiaoming, Srinivasa K. Prabhu, Weiying Yang, David L. Miller, and Nicholas P. Cernansky. "Tracer Fuel Injection Studies on Exhaust Port Hydrocarbon Oxidation." In International Fall Fuels and Lubricants Meeting and Exposition. SAE International, 1998. http://dx.doi.org/10.4271/982559.

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Du, Yuqi, and Linhua Guan. "Interwell Tracer Tests: Lessons Learnted from Past Field Studies." In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers, 2005. http://dx.doi.org/10.2118/93140-ms.

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Hu, Hui, and Manoochehr Koochesfahani. "Molecular Tagging Techniques for Micro-Flow and Micro-Scale Heat Transfer Studies." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78059.

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Abstract:
We report recent progresses made in development of novel molecule-based flow diagnostic techniques, named as Molecular Tagging techniques, to achieve simultaneous measurements of multiple important flow variables (such as flow velocity and temperature) for micro-flows and micro-scale heat transfer studies. Instead of using tiny particles, specially-designed phosphorescent molecules, which can be turned into long-lasting glowing molecules upon excitation by photons of appropriate wavelength, are used as tracers for both velocity and temperature measurements. A pulsed laser is used to “tag” the tracer molecules in the regions of interest, and the movements of the tagged molecules are imaged at two successive times within the photoluminescence lifetime of the tracer molecules. The measured Lagrangian displacement of the tagged molecules between the two image acquisitions provides the estimate of the fluid velocity vector. The simultaneous temperature measurement is achieved by taking advantage of the temperature dependence of phosphorescence lifetime, which is estimated from the intensity ratio of the tagged molecules in the two images. The implementation and application of the MTV&amp;T technique are demonstrated by conducting simultaneous velocity and temperature measurements to qunatify the transient behavior of electroosmotic flow (EOF) inside a microchannel and to reveal the unsteady heat transfer, mass transfer and phase changing process inside micro-sized water droplets pertinent to wind turbine icing phenomena.
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Yang, Weiying, Jincai Zheng, David L. Miller, and Nicholas P. Cernansky. "Tracer Fuel Injection Studies on Exhaust Port Hydrocarbon Oxidation: Part II." In CEC/SAE Spring Fuels & Lubricants Meeting & Exposition. SAE International, 2000. http://dx.doi.org/10.4271/2000-01-1945.

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Reports on the topic "Tracer studies"

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Shiller, Alan M. KERE Hydrographic/Tracer Studies. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada267269.

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Feddersen, Falk. Dispersion in the Surfzone: Tracer Dispersion Studies. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada557187.

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Ledwell, James R., and Timothy F. Duda. Tracer Studies of Mixing in Stratified Coastal Waters. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada380586.

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Roddick, J. C., R. W. Sullivan, and F. O. Dudas. Precise Calibration of Tracer Compositions For Sm - Nd Isotopic Studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/132926.

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Senum, G. I. Application of multitracer technology to petroleum reservoir studies. [Perfluorocarbon tracer technology]. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/7117982.

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Goddard, J. D. Non-Invasive Photochromic-Tracer Studies of Particulate Suspensions and Granular Media. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada329666.

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Daniels, Jeanette. Results of Chemical Analyses for Alcove 8/Niche 3 Tracer Studies. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/876579.

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Stokes, A. W., S. G. Hardcastle, and D. J. Kennedy. A real-time tracer gas analyzer - an investigational tool for mine ventilation studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304940.

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Krishna, K. R. Isotopic tracer studies of Fischer-Tropsch Synthesis over Ru/TiO sub 2 catalysts. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/5128268.

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Luong, Elise. Inductively coupled plasma mass spectrometry for stable isotope metabolic tracer studies of living systems. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/355038.

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