Results 21 to 30 of about 140,334 (356)

Apolipoprotein A-I assayed in human serum by isotope dilution as a potential standard for immunoassay.

Journal of Lipid Research, 1988
We measured the amount of apoA-I in serum by isotope dilution, finding 1.33 mg/ml (standard deviation 0.177) in six normolipidemic, healthy subjects. We developed this method by adapting published techniques to purify apoA-I from 3 ml of serum in two ...
P K Weech, D Jewer, Y L Marcel
doaj   +1 more source

Accurate quantification of selenoproteins in human plasma/serum by isotope dilution ICP-MS : focus on selenoprotein P [PDF]

, 2017
Acknowledgements The research leading to these results was funded by the EMRP Joint Research Project “Metrology for metalloproteins” (HLT-05 2012). The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.Peer ...
Busto, M. Estela del Castillo, Cuello-Nunez, Susana, Deitrich, Christian L., Fisicaro, Paola, Goenaga-Infante, Heidi, Konopka, Anna, Lehmann, Wolf D., Oster, Caroline, Raab, Andrea   +8 more
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Measurement of bile acid production in hyperlipidemic man: does phenotype or methodology make the difference?

Journal of Lipid Research, 1981
Bile acid production has been measured in 13 studies in 10 hyperlipidemic subjects by simultaneous use of isotope dilution kinetics and chemical balance methodology.
N O Davidson, P Samuel, S Lieberman, S P Shane, J R Crouse, E H Ahrens, Jr   +5 more
doaj   +1 more source

Combining Isotope Dilution and Standard Addition—Elemental Analysis in Complex Samples

Molecules, 2021
A new method combining isotope dilution mass spectrometry (IDMS) and standard addition has been developed to determine the mass fractions w of different elements in complex matrices: (a) silicon in aqueous tetramethylammonium hydroxide (TMAH), (b) sulfur
Christine Brauckmann, Axel Pramann, Olaf Rienitz, Alexander Schulze, Pranee Phukphatthanachai, Jochen Vogl   +5 more
doaj   +1 more source

Characterization of the key aroma compounds in three types of bagels by means of the sensomics approach

BMC Chemistry, 2021
Background To evaluate the impact of cold fermentation time on bagel rolls, the key aroma-active compounds in the volatile fractions obtained from three different bagel rolls through solvent assisted flavor evaporation (SAFE) were sequentially ...
Ola Lasekan, Fatma Dabaj, Megala Muniandy, Nurul Hanisah Juhari, Adeseye Lasekan   +4 more
doaj   +1 more source

Existing and emerging technologies for measuring stable isotope labelled retinol in biological samples: isotope dilution analysis of body retinol stores [PDF]

, 2014
This paper discusses some of the recent improvements in instrumentation used for stable isotope tracer measurements in the context of measuring retinol stores, in vivo.
Preston, Tom
core   +1 more source

Ultra-trace Cu isotope ratio measurements via multi-collector ICP-mass spectrometry using Ga as internal standard : an approach applicable to micro-samples [PDF]

, 2018
The capabilities of Cu isotope ratio measurements are often restricted by the small volumes of sample available and/or their low Cu concentration. In this work, an analytical approach was developed for performing Cu isotopic analysis via multi-collector ...
Costas Rodriguez, Marta, Lauwens, Sara, Vanhaecke, Frank   +2 more
core   +1 more source

A critical examination of substoichiometric isotope dilution analysis using thymidine and leucine

Scientia Marina, 1999
Isotope dilution analysis is used to determine the specific activity of radiolabelled precursors such as 3H-thymidine and 3H-leucine incorporated into DNA or protein in environmental samples.
David F. Bird
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Validation by collaborative trial of a method for the determination by GC–MS and LC–MS/MS of boar taint marker compounds in pork tissue

Food Chemistry: X, 2020
Meat from male pigs may develop an off-flavour, commonly known as boar taint. Castration of male piglets prevents the potential formation of off-flavour.In the suggested method, three marker compounds for boar taint (skatole, androstenone and indole) are
Gerhard Buttinger, Thomas Wenzl
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Quantitative analysis and detection of chaptalization and watering down of wine using isotope ratio mass spectrometry

BIO Web of Conferences, 2019
In early 1990's European Union has established new isotopic approach for detection of wine authenticity. In this article we setup the possibility of using new approach using new EIM – Module – IRMS (Ethanol Isotope Measurement – Module – Isotope Ratio ...
Smajlovic I., Wang D., Túri M., Qiding Z., Futó I., Veres M., Sparks K.L., Sparks J.P., Jakšić D., Vuković A., Vujadinović M.   +10 more
doaj   +1 more source