Works by Helfer, Andreas

Results: 7

Metabolic patterns of JWH-210, RCS-4, and THC in pig urine elucidated using LC-HR-MS/MS: Do they reflect patterns in humans?

Published in:

Drug Testing & Analysis, 2017, v. 9, n. 4, p. 613, doi. 10.1002/dta.1995

By:

Schaefer, Nadine;
Helfer, Andreas G.;
Kettner, Mattias;
Laschke, Matthias W.;
Schlote, Julia;
Ewald, Andreas H.;
Meyer, Markus R.;
Menger, Michael D.;
Maurer, Hans H.;
Schmidt, Peter H.

Publication type:

Article

Elucidation of the metabolites of the novel psychoactive substance 4-methyl- N-ethyl-cathinone (4-MEC) in human urine and pooled liver microsomes by GC-MS and LC-HR-MS/MS techniques and of its detectability by GC-MS or LC-MS<sup>n</sup> standard screening approaches

Published in:

Drug Testing & Analysis, 2015, v. 7, n. 5, p. 368, doi. 10.1002/dta.1682

By:

Helfer, Andreas G.;
Turcant, Alain;
Boels, David;
Ferec, Séverine;
Lelièvre, Bénédicte;
Welter, Jessica;
Meyer, Markus R.;
Maurer, Hans H.

Publication type:

Article

Blood pressure reductions following catheter-based renal denervation are not related to improvements in adherence to antihypertensive drugs measured by urine/plasma toxicological analysis.

Published in:

Clinical Research in Cardiology, 2015, v. 104, n. 12, p. 1097, doi. 10.1007/s00392-015-0905-5

By:

Ewen, Sebastian;
Meyer, Markus;
Cremers, Bodo;
Laufs, Ulrich;
Helfer, Andreas;
Linz, Dominik;
Kindermann, Ingrid;
Ukena, Christian;
Burnier, Michel;
Wagenpfeil, Stefan;
Maurer, Hans;
Böhm, Michael;
Mahfoud, Felix

Publication type:

Article

Metabolism of the new psychoactive substances N, N-diallyltryptamine (DALT) and 5-methoxy-DALT and their detectability in urine by GC-MS, LC-MS, and LC-HR-MS-MS.

Published in:

Analytical & Bioanalytical Chemistry, 2015, v. 407, n. 25, p. 7831, doi. 10.1007/s00216-015-8955-0

By:

Michely, Julian;
Helfer, Andreas;
Brandt, Simon;
Meyer, Markus;
Maurer, Hans

Publication type:

Article

Studies on the metabolism and toxicological detection of the new psychoactive designer drug 2-(4-iodo-2,5-dimethoxyphenyl)- N-[(2-methoxyphenyl)methyl]ethanamine (25I-NBOMe) in human and rat urine using GC-MS, LC-MS, and LC-HR-MS/MS.

Published in:

Analytical & Bioanalytical Chemistry, 2015, v. 407, n. 22, p. 6697, doi. 10.1007/s00216-015-8828-6

By:

Caspar, Achim;
Helfer, Andreas;
Michely, Julian;
Auwärter, Volker;
Brandt, Simon;
Meyer, Markus;
Maurer, Hans

Publication type:

Article

No-carrier-added labeling of the neuroprotective Ebselen with selenium-73 and selenium-75.

Published in:

Journal of Labelled Compounds & Radiopharmaceuticals, 2015, v. 58, n. 3, p. 141, doi. 10.1002/jlcr.3274

By:

Helfer, Andreas;
Ermert, Johannes;
Humpert, Sven;
Coenen, Heinz H.

Publication type:

Article

Carrier-effect on palladium-catalyzed, nucleophilic <sup>18</sup>F-fluorination of aryl triflates.

Published in:

Journal of Labelled Compounds & Radiopharmaceuticals, 2012, v. 55, n. 12, p. 450, doi. 10.1002/jlcr.2973

By:

Cardinale, Jens;
Ermert, Johannes;
Kügler, Fabian;
Helfer, Andreas;
Brandt, Marie R.;
Coenen, Heinz H.

Publication type:

Article