Results 271 to 280 of about 6,617,754 (307)

Evaluation of Carbon-11 Labelled Phenylglycine and Phenylalanine for Pancreas Scintigraphy

Nuklearmedizin, 1975
SummaryCarbon-11 (t½ = 20.4 min, β+) labelled DL-α-phenylalanine and DL-α-phenylglycine were administered intravenously to rats and the distribution of the radioactive amino acids over pancreas, liver, spleen, kidneys and blood was measured after several time intervals.
VAALBURG, W, BEERLINGVANDERMOLEN, HD, WOLDRING, MG   +2 more
openaire   +3 more sources

Relationship of molecular structure to in vivo distribution of carbon-11-labeled compounds

European Journal of Nuclear Medicine, 1980
Six 11C-labeled aliphatic diamines containing 4–9 linear carbon atoms were synthesized in radiochemical yields of 57% to 84% by reduction of the intermediate 11C-dinitriles prepared from Na 11CN and the corresponding bromonitrile or dibromoalkane. The biodistribution of each 11C-diamine was studied in male Sprague-Dawley rats.
M B, Winstead, D D, Dischino, N A, Munder, C, Walsh, H S, Winchell   +4 more
openaire   +2 more sources

A new synthesis of carbon-11 labelled phosgene

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1987
Abstract [11C]Phosgene is an important precursor in the 11C labelling of certain medically useful molecules. Phosgene allows a carbonyl function to be inserted between two stereo-chemically close amino functions. Until now, [11C]phosgene has been synthesized from [11C]carbon dioxide.
P. Landais, C. Crouzel
openaire   +1 more source

Reactions of recoiling carbon-11 atoms with toluene

The Journal of Physical Chemistry, 1986
Formation of benzocyclobutene, a characteristic rearrangement product of tolylmethylenes, strongly suggests that these species are formed as intermediates in the reactions of recoiling carbon-11 atoms and toluene. Degradation and additive studies indicated that both singlet and triplet carbon atoms can lead to benzocyclobutene formation through ...
Peter P. Gaspar, David M. Berowitz, Daniel R. Strongin, Daniel L. Svoboda, Matthew B. Tuchler, Richard A. Ferrieri, Alfred P. Wolf   +6 more
openaire   +1 more source

Carbon-11 and radiopharmaceuticals

The International Journal of Applied Radiation and Isotopes, 1977
A P, Wolf, C S, Redvanly
openaire   +2 more sources

In vivo demonstration of enzyme activity in endocrine pancreatic tumors: decarboxylation of carbon-11-DOPA to carbon-11-dopamine.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 1996
We used PET to characterize the uptake and decarboxylation of 11C-L-DOPA in vivo in two patients with endocrine pancreatic tumors: one glucagonoma and one gastrinoma.With L-DOPA labeled with 11C in the beta position, in which the radioactive label follows the molecule through decarboxylation to dopamine, significant uptake was observed in the tumors ...
M, Bergström, B, Eriksson, K, Oberg, A, Sundin, H, Ahlström, K J, Lindner, P, Bjurling, B, Långström   +7 more
openaire   +1 more source

Carbon-11 Amino Acids, Labeling and Metabolites

1993
The preparation methods available for 11C-amino acids and the different aspects of the value of these amino acids for measuring the protein synthesis rate in vivo are discussed.
Willem Vaalburg, Philip H. Elsinga, Anne M. J. Paans   +2 more
openaire   +1 more source

Permafrost carbon emissions in a changing Arctic

Nature Reviews Earth & Environment, 2022
Kimberley R Miner, Merritt R Turetsky, Edward Malina   +2 more
exaly  

Carbon and nitrogen cycling on the Qinghai–Tibetan Plateau

Nature Reviews Earth & Environment, 2022
Huai Chen, Xingliang Xu, Yongheng Gao
exaly  

PET studies on dopamine D1 receptors in the human brain with carbon-11-SCH 39166 and carbon-11-NNC 756.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 1995
PET studies were carried out on brain dopamine D1 receptors using two new ligands, [11C]SCH 39166 and [11C]NNC 756.Four normal subjects and eight predominantly unilateral patients with early Parkinson's disease were investigated. Each of them underwent both a PET scan with [11C]SCH 39166 and one with [11C]NNC 756.
A O, Laihinen, J O, Rinne, H M, Ruottinen, K A, Någren, P K, Lehikoinen, V J, Oikonen, U H, Ruotsalainen, U K, Rinne   +7 more
openaire   +1 more source