Results 51 to 60 of about 22,354,229 (295)
Recent Progresses in Stable Isotope Analysis of Cellulose Extracted from Tree Rings
Plants, 2021 In this work, the challenges and progression in stable isotope investigation, from the analytical tools and technical sample preparation procedures to the dendroclimatological experiments, were reviewed in terms of their use to assess tree physiological ...
Silviu-Laurentiu Badea +2 more
doaj +1 more source
A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation [PDF]
, 2009 The isotopic composition of molecular hydrogen (H<sub>2</sub>) produced by photochemical oxidation of methane (CH<sub>4</sub>) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H<sub>2 ...
Sub Atmospheric physics and chemistry +8 more
core +3 more sources
Measurement of soil respiration and its isotope signature using an automated closed-chamber system [PDF]
, 2014 A variety of methods is currently used for measuring soil and plant respiration and its isotope composition. Limitations found in the literature show a lack of a single set of specifications for these measurements. This report details a unique laboratory
Downie, Matthew
core +5 more sources
Advanced Engineering Materials, EarlyView.Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees +6 more
wiley +1 more source
Energies, 2019 A geochemistry study has been done in four geothermal manifestations—Ie-Seu’um, Ie-Brôuk, Ie-Jue and the Van-Heutz crater—located in the north zone of Seulawah Agam mountain (Aceh Besar District, Indonesia). The study was performed
Rinaldi Idroes +10 more
doaj +1 more source
Scientific Reports, 2022 Magnetic resonance-guided radiotherapy (MRgRT) has been developed and installed in recent decades for external radiotherapy in several clinical facilities.
Yoshie Yachi +5 more
doaj +1 more source
Calibration of isotope amount ratios by analysis of isotope mixtures
Analytical and Bioanalytical Chemistry, 2012 The question as to what constitutes a fully calibrated isotope amount ratio measurement still remains a topic of active research. For years, the definitive calibration approach has been by means of synthetic mixtures of highly enriched isotopes with known chemical purity to give gravimetrically defined ratios.
openaire +3 more sources
Advanced Engineering Materials, EarlyView.Near‐surface deuterium enrichment profiles for different microstructural types of TiAl after exposure at 700 °C in a heavy water‐containing environment. The deuterium levels are significantly higher than expected from natural occurrence, indicating that the heavy water dissociated during the exposure treatment and entered the specimens.
Jonathan D. H. Paul +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg +6 more
wiley +1 more source
Crown-of-Thorns Starfish Larvae Can Feed on Organic Matter Released from Corals
Diversity, 2016 Previous studies have suggested that Crown-of-Thorns starfish (COTS) larvae may be able to survive in the absence of abundant phytoplankton resources suggesting that they may be able to utilize alternative food sources.
Ryota Nakajima +5 more
doaj +1 more source