Results 41 to 50 of about 18,323 (221)

Guidelines for Sample Preparation and Stable Isotope Analysis of Food for Traceability Studies

Food Safety and Health, EarlyView.
This workflow illustrates sample preparation and analysis steps in stable isotope ratio mass spectrometer (IRMS) for food traceability. It emphasizes standardized preparation, encapsulation, calibration, and quality control to ensure accurate, comparable isotope data critical for verifying food origin and authenticity across complex supply chains ...
Bayan Nuralykyzy, Syed Abdul Wadood, Jing Nie, Hanyi Mei, Shengzhi Shao, Yongzhi Zhang, Chunlin Li, Yuwei Yuan, Karyne M. Rogers   +8 more
wiley   +1 more source

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

Floresta e Ambiente, 2018
This study aimed to analyze relations between the distribution of tree species and variations in soil texture, fertility and organic matter levels in a rupestrian cerrado area located in Diamantina-MG.
Daniel Dantas, Maria José Souza, Arthur Vieira, Marcio Oliveira, Israel Pereira, Evandro Machado, Claudio Marcio Souza, Wellington Rocha   +7 more
doaj   +1 more source

Muon Catalyzed Fusion in 3 K Solid Deuterium

, 1997
Muon catalyzed fusion in deuterium has traditionally been studied in gaseous and liquid targets. The TRIUMF solid-hydrogen-layer target system has been used to study the fusion reaction rates in the solid phase of D_2 at a target temperature of 3 K ...
Adamczak, A., Bailey, J. M., Beer, G. A., Beveridge, J. L., Fujiwara, M. C., Huber, T. M., Jacot-Guillarmod, R., Kammel, P., Kim, S. K., Knowles, P. E., Kunselman, A. R., Marshall, G. M., Martoff, C. J., Mason, G. R., Mulhauser, F., Olin, A., Petitjean, C., Porcelli, T. A., Zmeskal, J.   +18 more
core   +1 more source

Twin‐compartment solid–liquid cells for neutron reflectometry

Journal of Applied Crystallography, EarlyView.
We introduce a twin‐compartment solid–liquid cell for neutron reflectometry that divides a single substrate into two independent measurement areas, doubling sample capacity and enabling direct side‐by‐side comparisons. This sample environment also reduces alignment and sample preparation time and has been successfully tested on both vertical and ...
Nicoló Paracini, Hannah Burrall, Thomas Saerbeck, Philipp Gutfreund, Giovanna Fragneto, Luke A. Clifton, Thomas Arnold, Marité Cárdenas   +7 more
wiley   +1 more source

Measuring deuterium concentration in water

Reviews in Analytical Chemistry
Deuterium is a heavy nonradioactive isotope of hydrogen, present in ocean water at a concentration of around 150 parts per million (ppm). In terrestrial nature, deuterium content in water varies by at least a factor of two, while in industry and research,
Zubarev Roman A., Uspenskaya Elena V., Vasil’ev Vasilii G., Levitskaya Olga V., Ivlev Vasilii A., Syroeshkin Anton V.   +5 more
doaj   +1 more source

New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

, 2015
New approach to highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions is developed. This effective, fast and numerically stable method is based on the use of the Rayleigh's formula for the spherical ...
Frolov, Alexei M.
core   +1 more source

Differences in xylem and leaf hydraulic traits explain differences in drought tolerance among mature Amazon rainforest trees [PDF]

, 2017
Considerable uncertainty surrounds the impacts of anthropogenic climate change on the composition and structure of Amazon forests. Building upon results from two large-scale ecosystem drought experiments in the eastern Brazilian Amazon that observed ...
da Costa, Antonio Carlos Lola, de Oliveira, Alex A. R., Meir, Patrick, Moorcroft, Paul R., Powell, Thomas L., Saleska, Scott R., Wheeler, James K.   +6 more
core   +1 more source

Interfacial Behavior of Methane in Methane/p‐Xylene/Water Systems: First Principles Inspected Using Neutron Imaging and Molecular Dynamics Simulations

Advanced Materials Interfaces, Volume 13, Issue 6, 16 March 2026.
Pressurized gases reduce interfacial tension (IFT) at the gas‐liquid interfaces, their influence on the liquid–liquid interfaces remains unclear. For model compounds methane, water, and p‐xylene, neutron imaging observation of pressurized three‐phase systems is combined with Molecular Dynamics simulations.
Martin Melčák, Tereza‐Markéta Durďáková, Petr Číhal, Jonatan Šercl, Jongmin Lee, Pierre Boillat, Jan Heyda, Pavel Trtik, Ondřej Vopička   +8 more
wiley   +1 more source

Marked changes in electron transport through the blue copper protein azurin in the solid state upon deuteration

, 2012
Measuring electron transport (ETp) across proteins in the solid-state offers a way to study electron transfer (ET) mechanism(s) that minimizes solvation effects on the process.
Alessandrini, Antonello, Battistuzzi, Beratan, D. Cahen, Davis, Gray, Groeneveld, Hammes-Schiffer, I. Pecht, Kovacs, M. Sheves, Marcus, Marshall, MEI, N. Amdursky, Regan, Ringe, Ron, Rosen, Sepunaru, Sepunaru, Teeter, Whitmire, Zhao   +24 more
core   +1 more source

Pharmacological effects of the isomeric mixture of alpha and beta amyrin from Protium heptaphyllum: a literature review

Fundamental & Clinical Pharmacology, 2018
Protium heptaphyllum Aubl. belongs to the Burseraceae family. It is commonly called ‘almecegueira’ and is known to produce an amorphous resin which has constituents such as α‐ and β‐amyrin, taraxastan‐3‐oxo‐20‐ol and sitostenonein.
A. O. Nogueira, Yasmin Ingrid S Oliveira, Beatriz L Adjafre, Maria Elisabete Amaral de Moraes, G. Aragão   +4 more
semanticscholar   +1 more source