Results 11 to 20 of about 140,334 (356)
Comparison of 15N isotope methods to determine the recovery efficiency of nitrogen from green manure [PDF]
Pesquisa Agropecuária Brasileira, 2019 : The objective of this work was to compare three methods of 15N isotope application to the soil in order to determine the recovery efficiency of nitrogen derived from green manure by corn (Zea mays).
Ednaldo da Silva Araújo +6 more
doaj +1 more source
A candidate reference measurement procedure for quantification of glycocholic acid in human serum based on isotope dilution liquid chromatography-tandem mass spectrometry [PDF]
Anal Bioanal ChemP Zhang +5 more
openalex +2 more sources
Use of isotope dilution method to predict bioavailability of organic pollutants in historically contaminated sediments. [PDF]
, 2014 Many cases of severe environmental contamination arise from historical episodes, where recalcitrant contaminants have resided in the environment for a prolonged time, leading to potentially decreased bioavailability.
Bao, Lian-Jun +4 more
core +2 more sources
Journal of Lipid Research, 1997 In hypertriglyceridemic subjects, bile acid synthesis measured by isotope dilution is consistently higher than synthesis measured by fecal acidic sterol output.
W C Duane
doaj +1 more source
Blank Correction in Isotope Dilution
Analytical Chemistry, 2015 A novel method for compensation of the procedural blank in isotope dilution is presented. This method, entitled "blank-matching", copes with the blank through experimental design. Both sample and calibration solutions are exposed to the same amount of isotopic standard and same procedural blank.
Pagliano, Enea +2 more
openaire +4 more sources
Journal of Lipid Research, 2001 A stable isotope dilution method is described that allows measurement of cholic acid (CA) kinetics, that is, pool size, fractional turnover rate (FTR), and synthesis rate in mice, rats, and humans.
Christian V. Hulzebos +10 more
doaj +1 more source
Synthesis and analysis of stable isotope-labelled N-acyl homoserine lactones [PDF]
, 2016 Aliphatic aldehydes were deuterated at the alpha-position via a base-catalyzed exchange reaction with D2O. These deuterated building blocks were used for the synthesis of labelled analogues of quorum sensing signal molecules belonging to the three major ...
De Kimpe, Norbert +3 more
core +2 more sources
Journal of Lipid Research, 1990 We have developed an isotope dilution method for determination of deoxycholic acid pool size and input rate which employs oral administration of 50 mg of [24-13C]deoxycholic acid and serum sampling.
F Stellaard +3 more
doaj +1 more source
Determination of Creatinine in Human Urine with Flow Injection Tandem Mass Spectrometry [PDF]
, 2012 Background/Aims: Excretion of urinary compounds in spot urine is often estimated relative to creatinine. For the growing number of liquid chromatography-tandem mass spectrometry (LC-MS/MS) assays of urine-excreted molecules, a fast and accurate method ...
Koletzko, Berthold +2 more
core +1 more source
Solution to the isotope dilution challenge [PDF]
Analytical and Bioanalytical Chemistry, 2015 Over the years, isotope dilution mass spectrometry (IDMS) has witnessed many reformulations. One of the earliest expressions for this quantitation model was given by the single isotope dilution (IDMS). In IDMS, the mass fraction of an analyte A is obtained from mass spectrometric analysis of a mixture (blend) of sample and an isotopically-enriched form
openaire +3 more sources