Results 101 to 110 of about 544,006 (376)

Determination of itraconazole and hydroxyitraconazole in plasma by use of liquid chromatography-tandem mass spectrometry with on-line solid-phase extraction [PDF]

, 2003
In this paper a method for the simultaneous quantification of the anti-fungal drug itraconazole and its co-active metabolite hydroxyitraconazole in plasma employing liquid chromatography tandem-mass spectrometry and automated solid-phase extraction is ...
Schiel, Xaver, Spöhrer, Ute, Vogeser, Michael   +2 more
core   +1 more source

A Dual‐Emissive DNA‐Templated Silver Nanocluster with Near‐Infrared I and II Emission

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study presents a dual‐emissive DNA‐stabilized silver nanocluster with a nanosecond‐lived NIR‐I emission band and a microsecond‐lived NIR‐II emission band. Mass spectrometry establishes that the nanocluster has molecular formula (DNA)2[Ag17]11+. DNA sequence variations reveal critical nucleobases for stabilization, and modifications at the DNA 5 ...
Anna Gonzàlez‐Rosell, Vanessa Rück, Mikkel B. Liisberg, Cecilia Cerretani, Villads R. M. Nielsen, Tom Vosch, Stacy M. Copp   +6 more
wiley   +1 more source

Comprehensive Molecular Characterization of Atmospheric Brown Carbon by High Resolution Mass Spectrometry with Electrospray and Atmospheric Pressure Photoionization.

Analytical Chemistry, 2018
Light-absorbing components of atmospheric organic aerosols, which are collectively termed "brown carbon" (BrC), are ubiquitous in the atmosphere. They affect absorption of solar radiation by aerosols in the atmosphere and human health as some of them ...
Peng Lin, Lauren T. Fleming, S. Nizkorodov, Julia Laskin, Alexander Laskin   +4 more
semanticscholar   +1 more source

The path of biomolecular mass spectrometry into open research

Nature Communications, 2019
Originally designed for measuring isotope abundances and elemental masses, mass spectrometry is becoming a mainstay across life sciences. As electrospray ionization of biomolecules turns 30 and the Orbitrap mass analyzer 20, we take this opportunity to ...
doaj   +1 more source

Radical Mechanism in the Elimination of 2-Arylsulfinyl Esters [PDF]

, 2012
The mechanism of the dehydrosulfenylation of 2-arylsulfinyl esters was investigated. The reaction was found to follow a homolytic cleavage mechanism as verified by electrospray ionization tandem mass spectrometry and experimental work.
González, Florenci, Izquierdo Ferrer, Javier, Latorre, Antonio, López Martín, Irakusne, Ramírez, Victoria, Rodríguez Pastor, Santiago, Vicent Barrera, Cristian   +6 more
core   +1 more source

Development of Photo‐Biocatalytic Redox System for Asymmetric Synthesis of Optically Active Amines Using Blue Light and Transaminases. A Case Study Toward Mavacamten

Advanced Synthesis &Catalysis, EarlyView.
Abstract α‐Chiral amines are versatile building blocks for the asymmetric synthesis of optically pure high‐added‐value chemicals, including pharmaceuticals, agrochemicals, and natural products. Herein, we report a one‐pot, two‐step sequential deracemization of racemic sec‐alcohols to optically enriched primary amines throught a photo‐biocatalytic ...
Natalia Antos, Aleksandra Rudzka, Anna Hoser, Tamara Reiter, Wolfgang Kroutil, Paweł Borowiecki   +5 more
wiley   +1 more source

Characterization of Proanthocyanidins from Parkia biglobosa (Jacq.) G. Don. (Fabaceae) by Flow Injection Analysis — Electrospray Ionization Ion Trap Tandem Mass Spectrometry and Liquid Chromatography/Electrospray Ionization Mass Spectrometry

Molecules, 2013
The present study investigates the chemical composition of the African plant Parkia biglobosa (Fabaceae) roots and barks by Liquid Chromatography - Electrospray Ionization and Direct Injection Tandem Mass Spectrometry analysis.
Wagner Vilegas, Lourdes Campaner dos Santos, Augustin Ephrem Nkengfack, Clenilson Martins Rodrigues, Viviane Candida da Silva, Viviane Raïssa Sipowo Tala   +5 more
doaj   +1 more source

Top-Down Mass Spectrometry Imaging of Intact Proteins by LAESI FT-ICR MS [PDF]

arXiv, 2013
Laser Ablation Electrospray Ionization is a recent development in mass spectrometry imaging. It has been shown that lipids and small metabolites can be imaged in various samples such as plant material, tissue sections or bacterial colonies without anysample pre-treatment.
arxiv  

Charge emissions from Electrosprays in vacuum: mixtures of formamide with methylammonium formate [PDF]

D. Garoz y J. Fernandez de la Mora, Journal of Applied Physics, vol. 113, n. 6, pp. 064901-064901-8, feb. 2013
The charge/mass distribution f(q/m) of nanodrops and ions electrosprayed in vacuum from mixtures of formamide (FM) and methylammonium formate (MAF) is studied by time of flight mass spectrometry at MAF/FM volumetric concentrations of 5%, 10%, 25% and 50%.
arxiv   +1 more source

Rapid and comprehensive evaluation of (poly)phenolic compounds in pomegranate (punica granatum L.) juice by UHPLC-MSn [PDF]

, 2012
The comprehensive identification of phenolic compounds in food and beverages is a crucial starting point for assessing their biological, nutritional, and technological properties.
Alan Crozier, Chiara Dall'Asta, Cristina García-Viguera, Cristofori, Daniele Del Rio, Di Stefano, Eklund, Gasperotti, Gianni Galaverna, Gil, Hukkanen, Kähkönen, Luca Calani, Mena, Mena, Pedro Mena, Perestrelo, Pérez-Vicente, Renato Bruni, Törrönen, Venzie, Wang   +21 more
core   +2 more sources