Results 181 to 190 of about 195,229 (259)

In Vivo and In Vitro Evaluation of PTeCA (1H‐Pyrrole‐2,3,4,5‐Tetracarboxylic Acid) in Hair Matrix as a Marker for Oxidative Cosmetic Treatment

Drug Testing and Analysis, EarlyView.
A total of 3378 self‐reported treated and untreated hair samples were analyzed for PTCA and PTeCA by LC‐MS/MS. Moreover, their in vitro formation was assessed in 225 untreated hair by different cosmetic treatments with and without oxidative agents. Data suggest that PTeCA could be a reliable marker for oxidative cosmetic treatments in hair.
Sara Casati, Alessandro Ravelli, Roberta F. Bergamaschi, Agata Magliocco, Sofia Vanerio, Gabriella Roda, Paola Rota, Marica Orioli, Alessio Battistini   +8 more
wiley   +1 more source

Chemical Straightening as a Source of Analytical Variability in Hair Testing: A Dual‐Analyte Case Report

Drug Testing and Analysis, EarlyView.
ABSTRACT Hair analysis is increasingly used in forensic toxicology; however, result interpretation may be influenced by cosmetic hair treatments. Although the effects of bleaching, dyeing, and thermal straightening have already been evaluated, data on permanent chemical hair straightening are scarce, particularly under in vivo conditions.
Miriam Blanco‐Ces, Ana de‐Castro‐Ríos, María Cobo‐Golpe, Ángela López‐Rabuñal, Angelines Cruz, Elena Lendoiro   +5 more
wiley   +1 more source

Tumor-Promoted Changes in Pediatric Brain Histology Can Be Distinguished from Normal Parenchyma by Desorption Electrospray Ionization Mass Spectrometry Imaging. [PDF]

Biomedicines
Seidinger AL, Silva FLT, Euzébio MF, Krieger AC, Meidanis J, Gutierrez JM, Bezerra TMS, Queiroz L, Silva AAR, Hoffmann IL, Daiggi CMM, Tedeschi H, Eberlin MN, Eberlin LS, Yunes JA, Porcari AM, Cardinalli IA.   +16 more
europepmc   +1 more source

Identification and Characterization of the Designer Opioid N‐Pyrrolidino Fluetonitazene in Nasal Spray

Drug Testing and Analysis, EarlyView.
N‐Pyrrolidino fluetonitazene, a synthetic opioid, was identified and characterized in a nasal spray using GC‐MS, LC‐QTOF‐MS, NMR and FT‐IR. ABSTRACT Detection of drugs in non‐biological samples serves as a fundamental basis for identifying emerging trends in the field of new psychoactive substances and provides valuable information for optimizing ...
Fabian Picht, Valentin Cepus, Rona Hohlfeld, Julian Klingbeil, Marco Weber   +4 more
wiley   +1 more source

Automated sample preparation for electrospray ionization mass spectrometry based on CLOCK-controlled autonomous centrifugal microfluidics. [PDF]

Biomed Microdevices
Futami M, Naito H, Ninomiya S, Chen LC, Iwano T, Yoshimura K, Ukita Y.   +6 more
europepmc   +1 more source

Analysis and Characterization of Kisspeptin and Its Analogues in Serum and Urine Samples by Liquid Chromatography–High‐Resolution Mass Spectrometry for Doping Control Purposes

Drug Testing and Analysis, EarlyView.
Sensitive LC‐HRMS methods were established for the detection of kisspeptin and its analogues in serum and urine, alongside their analytical and metabolic characterization. Stability studies were conducted in serum, plasma, and urine, highlighting the importance of appropriate sample handling for reliable anti‐doping analysis.
Sophia Krombholz, Linus Korsmeier, Andreas Thomas, Mario Thevis   +3 more
wiley   +1 more source

Real-Time Identification of Aerosol-Phase Carboxylic Acid Production Using Extractive Electrospray Ionization Mass Spectrometry. [PDF]

Environ Sci Technol
Surdu M, Top J, Yang B, Zhang J, Slowik JG, Prévôt ASH, Wang DS, El Haddad I, Bell DM.   +8 more
europepmc   +1 more source

Segmental Hair Analysis of Diphenhydramine and Cyclizine Following a Single Dose

Drug Testing and Analysis, EarlyView.
A single oral dose of diphenhydramine and cyclizine can be quantified in human head hair for a minimum of 5 months and, in certain cases, for up to 1 year following intake. Among 12 study participants, the measured concentrations ranged from 0 to 610 pg/mg within 1 year post‐intake.
Jan Bílek, Marie Katrine Klose Nielsen, Robert Kronstrand, Sys Stybe Johansen   +3 more
wiley   +1 more source

Hyphenation of microflow chromatography with electrospray ionization mass spectrometry for bioanalytical applications focusing on low molecular weight compounds: A tutorial review. [PDF]

Mass Spectrom Rev
Girel S, Meister I, Glauser G, Rudaz S.
europepmc   +1 more source

Elimination Profile of Deflazacort and Metabolites in Urine and Plasma Following Oral Administration: Relevance to Sports Drug Testing

Drug Testing and Analysis, EarlyView.
Results confirm that the MRL of 30 ng/mL for 21‐desacetyl‐deflazacort together with a 3‐day washout period is an appropriated strategy to detect oral deflazacort administration in sport competition. ABSTRACT Deflazacort (DEF) is a glucocorticoid prohibited in sports competitions when orally administered.
Sergi Coll, Claudia Bressan, Núria Monfort, Ana Aldea‐Perona, Marcel·lí Carbó, Rosa Ventura   +5 more
wiley   +1 more source