Results 301 to 310 of about 240,361 (354)

Protein Stable Isotope Fingerprinting: Multidimensional Protein Chromatography Coupled to Stable Isotope-Ratio Mass Spectrometry

Analytical Chemistry, 2014
Protein stable isotope fingerprinting (P-SIF) is a method to measure the carbon isotope ratios of whole proteins separated from complex mixtures, including cultures and environmental samples. The goal of P-SIF is to expose the links between taxonomic identity and metabolic function in microbial ecosystems.
Mohr, W., Tang, T., Sattin, S., Bovee, R., Pearson, A.   +4 more
openaire   +3 more sources

Stable isotope analysis of white paints and likelihood ratios

Science & Justice, 2009
Architectural paints are commonly found as trace evidence at scenes of crime. Currently the most widely used technique for the analysis of architectural paints is Fourier Transformed Infra-Red Spectroscopy (FTIR). There are, however, limitations to the forensic analysis of white paints, and the ability to discriminate between samples.
Farmer, Nicola, Meier-Augenstein, Wolfram, Lucy, David   +2 more
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Heavy element stable isotope ratios : analytical approaches and applications

Analytical and Bioanalytical Chemistry, 2013
Continuous developments in inorganic mass spectrometry techniques, including a combination of an inductively coupled plasma ion source and a magnetic sector-based mass spectrometer equipped with a multiple-collector array, have revolutionized the precision of isotope ratio measurements, and applications of inorganic mass spectrometry for biochemistry ...
Masaharu, Tanimizu, Yoshiki, Sohrin, Takafumi, Hirata   +2 more
openaire   +2 more sources

Referencing strategies and techniques in stable isotope ratio analysis

Rapid Communications in Mass Spectrometry, 2001
Abstract Stable isotope ratios are reported in the literature in terms of a deviation from an international standard (δ‐values). The referencing procedures, however, differ from instrument to instrument and are not consistent between measurement facilities.
Werner, R., Brand, W.
openaire   +3 more sources

Stable isotope ratio analysis for authentication of lamb meat

Meat Science, 2003
The effectiveness of the analysis of stable isotope ratios ((13)C/(12)C and (15)N/(14)N) in fractions of lamb meat, measured by isotope ratio mass spectrometry, was evaluated as a method of feeding and geographical origin authentication. Analyses were carried out on meat from 12 lamb types, produced in couples in six European countries (country of ...
Piasentier E, Valusso R, Camin F, Versini G, RI Camin Federica/C-3765-2008   +4 more
openaire   +4 more sources

Stable Neodymium Isotope Ratios of Geological Reference Materials

Geostandards and Geoanalytical Research, 2022
 Here, we report the stable Nd isotopic compositions of twenty‐seven widely available geological reference materials (RMs) including silicates, sediments, soils and carbonates. Nd was purified from geological samples using a single TODGA resin column. The Nd isotopic ratios were determined via MC‐ICP‐MS using the combined standard‐sample bracketing and
Jianghao Bai, Jinlong Ma, Gangjian Wei, Le Zhang, Chengshuai Liu, Ting Gao, Yuhui Liu, Yufei Liu   +7 more
openaire   +1 more source

Stable isotope ratio analysis in human hair

2011
Stable isotope ratio analysis of human hair has the potential to provide a wealth of information about nutritional status, metabolism and disease states. While applications are relatively new in clinical nutrition and metabolic studies, the study of natural isotope abundances in hair have been routinely applied to archaeological and ecological research
Klaus J Petzke, Benjamin T Fuller
openaire   +1 more source

Determination of Bromine Stable Isotopes Using Continuous-Flow Isotope Ratio Mass Spectrometry

Analytical Chemistry, 2005
A new methodology for bromine stable isotope determination by continuous-flow isotope ratio mass spectrometry (CF-IRMS) was developed. The technique was tested on inorganic samples. Inorganic bromide was precipitated in the form of silver bromide by using silver nitrate in a standard methodology.
Orfan, Shouakar-Stash, Shaun K, Frape, Robert J, Drimmie   +2 more
openaire   +2 more sources

Measurement of light stable isotope ratios by SIMS:

International Journal of Mass Spectrometry, 1998
Abstract Mass bias occurring during analysis of the light stable isotopes of oxygen, carbon, and sulfur in geological materials by secondary ionization mass spectrometry has been investigated. The effects of instrumental parameters (primary ion beam, secondary ion energy, and polarity) were evaluated by measuring sulfur isotope ratios in conductive ...
Lee R Riciputi, Bruce A Paterson, Robert L Ripperdan   +2 more
openaire   +1 more source

Stable Isotope Ratio Analysis for Authenticity Control

2017
This chapter summarizes terms, definitions, and reference materials used for stable isotope ratio analysis (SIRA ) of the bioelements hydrogen, carbon, and oxygen. The principles of biotic and abiotic fractionation in biomolecules like flavor compounds are explained. A short review of the common methods for the determination of isotope ratios \(\mathrm{
Norbert Christoph, Antje Schellenberg, Wiebke Zander, Gerhard Krammer   +3 more
openaire   +1 more source