David R. Turton

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Carbon-11-labeled flumazenil combined with positron emission tomography (PET) was used to measure the concentration (Bmax) of the benzodiazepine (Bz) receptor in the brain and its equilibrium dissociation constant (KD) for flumazenil in five normal subjects. The steady-state approach was used injecting the tracer as a bolus of high specific activity. In(More)
PK 11195 is a selective ligand for the peripheral-type benzodiazepine binding site (PTBBS). There are few such sites in normal brain but their number increases in association with tissue necrosis. The time-course of appearance of PTBBS around a focally induced ischaemic lesion in frontal cortex of rat brain was established by autoradiography using(More)
S-[11C]Nomifensine (S-[11C]NMF) is a positron-emitting tracer suitable for positron emission tomography, which binds to both dopaminergic and noradrenergic reuptake sites in the striatum and the thalamus. Modelling of the cerebral distribution of this drug has been hampered by the rapid appearance of glucuronide metabolites in the plasma, which do not cross(More)
The first transition-metal complex-based two-photon absorbing luminescence lifetime probes for cellular DNA are presented. This allows cell imaging of DNA free from endogenous fluorophores and potentially facilitates deep tissue imaging. In this initial study, ruthenium(II) luminophores are used as phosphorescent lifetime imaging microscopy (PLIM) probes(More)
[(11)C]-(+)-PHNO is a new dopamine D(2/3) receptor agonist radiotracer which has been successfully used to measure D(2/3) receptor availability in experimental animals and man. Here we report in vivo evaluation in the rat of the biodistribution, metabolism, specificity, selectivity, and dopamine sensitivity of carbon11-labeled PHNO ([(11)C]-3-PHNO) produced(More)
Regional cerebral [IIC]3-0-methyl-D-glucose ([IICMeG) uptake kinetics have been measured in five in­ sulin-dependent diabetic patients and four normal con­ trols using positron emission tomography (PET), Con­ comitant measurement of regional cerebral blood volume and CBF enabled corrections for the presence of intra­ vascular [IICJMeG signal in cerebral(More)
The history of watershed research in the Interior Highlands can be divided into four periods: While each of these periods was marked by different societal concerns and scientific questions, experimental forests played a central role in accomplishing watershed research during all of these periods. Unlike other regions of the country, there was no dominating(More)