Results 21 to 30 of about 101,472 (247)

Stable isotope analysis of human hair and nail samples: the effects of storage on samples [PDF]

, 2008
When submitting samples for analysis, maintaining sample integrity is essential. Appropriate packaging must be used to prevent damage, contamination or loss of sample.
Fraser, Isla, Kalin, Robert M., Meier-Augenstein, Wolfram   +2 more
core   +1 more source

Emerging techniques in vegetable oil analysis using stable isotope ratio mass spectrometry

Grasas y Aceites, 2002
As the practice of vegetable oil adulteration becomes more sophisticated, the possibility to subvert detection using established techniques such as capillary gas chromatography is increasing.
Simon D. Kelly, Christopher Rhodes
doaj   +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

41Ca in tooth enamel. part I: A biological signature of neutron exposure in atomic bomb survivors [PDF]

, 2010
The detection of 41Ca atoms in tooth enamel using accelerator mass spectrometry is suggested as a method capable of reconstructing thermal neutron exposures from atomic bomb survivors in Hiroshima and Nagasaki.
A. Arazi, A. Wallner, Arakawa E. T., Auxier J. A., Feldman G. J., Fink D., Fink D., G. Korschinek, G. Rugel, H. J. Maier, Huber T., K. Knie, Knie K., Knie K., Korschinek G., Korschinek G., Kutschera W., Kutschera W., Maier H. J., Marchetti A. A., McAninch J. E., Müller D., N. Nakamura, Nagashima Y., Nakamura N., Nolte E., Paul M., Preston D. L., Preston D. L., Preston D. L., Raisbeck G. M., Romanyukha A. A., Rugel G., Rugel G., Rühm W., Rühm W., Rühm W., Shizuma K., Straume T., Straume T., T. Faestermann, W. Rühm, Wallner A., Wallner A., Wallner A.   +44 more
core   +1 more source

A New Method for Silicon Triple Isotope Analysis With Application to Siliceous Sponge Spicules

Geochemistry, Geophysics, Geosystems, 2023
Multiple isotope ratios of elements disclose information on the fractionation mechanism that cannot be obtained from a single isotope ratio alone.
Andreas Pack, Eike‐Matthias Bultmann, Michael Tatzel, Joachim Reitner   +3 more
doaj   +1 more source

Application of Carbon Stable Isotope Ratio Mass Spectrometry in Authenticity of “Zero-Added-Glutamate” Soy Sauces

eFood, 2021
The zero-added exogenous monosodium glutamate (MSG) soy sauce market is developing rapidly, but its authenticity remains a challenge for the industry. In this study, carbon stable isotope ratio mass spectrometry was utilized to determine 13C/12C ratio ...
Jianbo Xiao, Mingfu Wang, Jian-Lin Wu
doaj   +1 more source

High-precision measurements of seawater Pb isotope compositions by double spike thermal ionization mass spectrometry [PDF]

, 2014
A new method for the determination of seawater Pb isotope compositions and concentrations was developed, which combines and optimizes previously published protocols for the separation and isotopic analysis of this element.
Bridgestock, L, Paul, M, Rehkämper, M, van DeFlierdt, T, Weiss, D   +4 more
core   +2 more sources

Sex-specific energy expenditure during the Alaska mountain wilderness ski classic; insights from an Arctic winter expedition

Frontiers in Physiology
PurposeThe Alaska Mountain Wilderness Ski Classic (AMWSC) is a self-supported and self-oriented winter expedition that occurs in the remote North American Brooks Range, ∼200 km north of the Arctic Circle.
Melynda S. Coker, Michelle N. Ravelli, Timothy C. Shriver, Dale A. Schoeller, Dustin R. Slivka, Brent C. Ruby, Robert H. Coker   +6 more
doaj   +1 more source

Competition and Predation in Soil Fungivorous Microarthropods Using Stable Isotope Ratio Mass Spectrometry

Frontiers in Microbiology, 2019
The soil food web is often described as having three main energy channels: root, bacterial and fungal. Here we provide quantitative data using a sensitive stable isotope ratio mass spectrometry procedure with microcosms on species interactions in the ...
Felicity V. Crotty, Sina M. Adl
doaj   +1 more source

Probing rapid carbon fixation in fast-growing seaweed Ulva meridionalis using stable isotope 13C-labelling

Scientific Reports, 2020
The high growth rate of Ulva seaweeds makes it a potential algal biomass resource. In particular, Ulva meridionalis grows up to fourfold a day. Here, we demonstrated strong carbon fixation by U.
Shuntaro Tsubaki, Hiroshi Nishimura, Tomoya Imai, Ayumu Onda, Masanori Hiraoka   +4 more
doaj   +1 more source