Results 21 to 30 of about 1,589,585 (300)

The Suitability of RNA from Positive SARS-CoV-2 Rapid Antigen Tests for Whole Virus Genome Sequencing and Variant Identification to Maintain Genomic Surveillance

open access: yesDiagnostics, 2023
The COVID-19 pandemic has transformed laboratory management, with a surge in demand for diagnostic tests prompting the adoption of new diagnostic assays and the spread of variant surveillance tools. Rapid antigen tests (RATs) were initially used only for
Annamaria Cucina   +6 more
doaj   +1 more source

Pitfall in the high-throughput quantification of whole blood cyclosporin A using liquid chromatography-tandem mass spectrometry [PDF]

open access: yes, 2005
In a growing number of laboratories the technique of liquid chromatography-tandem mass spectrometry is used for the quantification of cyclosporin A in whole blood, employing cyclosporin D as the internal standard. Cyclosporin A is extensively metabolized
Michael Vogeser   +3 more
core   +2 more sources

Gel filtration chromatography [PDF]

open access: yes, 2011
Gel-filtration chromatography is a popular and versatile technique that permits the effective separation of proteins and other biological molecules in high yield. Here, the basis of the method is described and typical matrix types are contrasted.
Ó Fágáin, Ciarán   +3 more
core   +2 more sources

Development of SPE clean-up procedure for acrylamide determination from potato-based products by GC-MS/MS

open access: yesOpen Agriculture, 2020
The aim of this work was to develop an analytical method for determining acrylamide in potato-based products by gas chromatography and tandem mass spectrometry analysis (GC-MS/MS) using solid-phase extraction (SPE) clean-up.
Negoiță Mioara   +3 more
doaj   +1 more source

Analysis of total urinary catecholamines by liquid chromatography: methodology, routine experience and clinical interpretations of results [PDF]

open access: yes, 1983
A simple routine method is described for simultaneous assay of total urinary adrenaline, noradrenaline and dopamine. The catecholamines are pre-purified on a small ion-exchange column, separated by reversed phase ion-pair liquid chromatography, and are ...
Schleicher, E. D.   +2 more
core   +1 more source

Polymer separations by liquid interaction chromatography: Principles - prospects - limitations

open access: yes, 2022
S.62-79Most heterogeneities of polymers with respect to different structural features cannot be resolved by only size exclusion chromatography (SEC), the most frequently applied mode of polymer chromatography.
Radke, W.
core   +1 more source

Hydrophobic interaction chromatography [PDF]

open access: yes, 2011
Most proteins and large polypeptides have hydrophobic regions at their surface. These hydrophobic ‘patches’ are due to the presence of the side chains of hydrophobic or non-polar amino acids such as phenylalanine, tryptophan, alanine and methionine ...
Cummins, Phil, O'Connor, Brendan
core   +2 more sources

Comprehensive Characterization of 76 Pharmaceuticals and Metabolites in Wastewater by LC-MS/MS

open access: yesChemosensors, 2021
Wastewaters are considered one of the main sources of pollution in the aquatic environment as release a large number of contaminants every day. Emerging contaminants such as pharmaceuticals have special interest due to the high levels of consumption by ...
Cristian Gómez-Canela   +4 more
doaj   +1 more source

Countercurrent chromatography in analytical chemistry (IUPAC technical report) [PDF]

open access: yes, 2009
© 2009 IUPACCountercurrent chromatography (CCC) is a generic term covering all forms of liquid-liquid chromatography that use a support-free liquid stationary phase held in place by a simple centrifugal or complex centrifugal force field. Biphasic liquid
Sutherland, IA   +37 more
core   +2 more sources

Efficient Sub-1 Minute Analysis of Selected Biomarker Catecholamines by Core-Shell Hydrophilic Interaction Liquid Chromatography (HILIC) with Nanomolar Detection at a Boron-Doped Diamond (BDD) Electrode

open access: yesSeparations, 2021
A rapid, sensitive method for the separation of catecholamine biomarkers (CAs), of importance in traumatic brain injury (TBI) and in Parkinson’s disease (PD), has been successfully developed using hydrophilic interaction liquid chromatography (HILIC ...
Majidah Alsaeedi   +4 more
doaj   +1 more source

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