Results 41 to 50 of about 157,168 (328)

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

On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion–isotope ratio mass spectrometry [PDF]

Atmospheric Measurement Techniques, 2013
Stable carbon isotope analysis of methane (δ13C of CH4) on atmospheric samples is one key method to constrain the current and past atmospheric CH4 budget.
J. Schmitt, B. Seth, M. Bock, C. van der Veen, L. Möller, C. J. Sapart, M. Prokopiou, T. Sowers, T. Röckmann, H. Fischer   +9 more
doaj   +1 more source

Radiocarbon dates and stable isotope data for human and animal skeletal remains from a passage grave in Kierzkowo, Poland (Late Neolithic and modern period)

Data in Brief, 2022
This dataset is comprised of paired radiocarbon (14C) dates, and carbon (δ13C) and nitrogen (δ15N) stable isotope ratios received for skeletal remains of 18 humans and 6 animals.
Łukasz Pospieszny, Szymon Nowaczyk
doaj   +1 more source

Proposal for International Agreement on Ca Notation resulting from discussion at workshops on stable isotope measurement held in Davos (Goldschmidt 2002) and Nice (EGS-AGU-EUG 2003) [PDF]

, 2004
A proposal is made to standardise the reporting of Ca isotope data to the δ44Ca/40Ca notation (or δ44Ca/42Ca) and to adopt NIST SRM 915a as the reference ...
Bock, Barbara, Eisenhauer, Anton, Fietzke, Jan, Gussone, Nikolaus, Hippler, Dorothee, Kramers, Jan, Nägler, Thomas F., Schmitt, Anne-Désirée, Stille, Peter   +8 more
core   +1 more source

Isotope determination of sulfur by mass spectrometry in soil samples

Revista Brasileira de Ciência do Solo, 2012
Sulphur plays an essential role in plants and is one of the main nutrients in several metabolic processes. It has four stable isotopes (32S, 33S, 34S, and 36S) with a natural abundance of 95.00, 0.76, 4.22, and 0.014 in atom %, respectively. A method for
Alexssandra Luiza Rodrigues Molina Rossete, Josiane Meire Toloti Carneiro, Carlos Roberto Sant Ana Filho, José Albertino Bendassolli   +3 more
doaj   +1 more source

Beryl Reference Materials for In Situ Oxygen Isotope Determination

Crystals, 2021
The mineral beryl (Be3Al2(SiO3)6) has the most abundant phase with industrial value for extracting a critical metal—beryllium. Due to multi-stage, fluid-induced growth, individual beryl grains may yield complex geochemical records, revealing variations ...
Xiaoxiao Ling, Qiuli Li, Lianjun Feng, Di Zhang, Yu Liu, Guoqiang Tang, Jiao Li, Shitou Wu, Liangliang Huang, Tiejun Li, Yan Liu, Ronald Werner, Xianhua Li   +12 more
doaj   +1 more source

Recent developments in isotope-ratio mass spectrometry for geochemistry and cosmochemistry

, 2016
Mass spectrometry is fundamental to measurements of isotope ratios for applications in isotope geochemistry, geochronology, and cosmochemistry. Magnetic-sector mass spectrometers are most common because these provide the best precision in isotope ratio ...
Ireland, Trevor
core   +1 more source

Analysis of Hydrogen Isotope Abundance by High Resolution Isotope Ratio Mass Spectrometry

Zhipu Xuebao
High resolution isotope ratio mass spectrometry (HR-IRMS) is often used to measure the abundance of deuterium to verify the efficiency of isotope isolation of a cryogenic distillation column system.
Chao WU, Shi-lin HU, Ying REN, Yan LIU, Bin-yong ZHANG, Yu-fei WANG   +5 more
doaj   +1 more source

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

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source