Results 31 to 40 of about 347,722 (310)
Isotope fractionation during the synthesis of MDMA.HCl from helional
, 2022 An investigation into isotopic fractionation during the production of 3,4-methylenedioxymethylamphetamine (MDMA) from the novel precursor helional, and during the hydrochloric (HCl) salt precipitation of MDMA was conducted.
Cresswell, Sarah L +9 more
core +1 more source
Spatial and temporal variations of fractionation of stable isotopes in East-Antarctic snow
Journal of Glaciology, 2021 Stable isotope ratios (δ18O and δD) in Antarctic snow and ice are basic proxy indices of climate in ice core studies. The relation between the ratios has important indicative significance for moisture sources.
Chuanjin Li +15 more
doaj +1 more source
Quantum Information Processing, 2019 The concept of entanglement fraction is generalized to define coherence fraction of a quantum state. Precisely, it quantifies the proximity of a quantum state to maximally coherent state and it can be used as a measure of coherence. Coherence fraction has a connection with $l_1$-norm coherence and provides the criteria of coherence distillability ...
Sumana Karmakar +4 more
openaire +2 more sources
Membranes, 2022 The objective of this work was to evaluate the effect of operating conditions and fructans size distribution on the tight Ultrafiltration process for agave fructans fractionation.
Noe Luiz-Santos +5 more
doaj +1 more source
The geochemical and fractionation study on toxic elements in road dust collected from the arterial roads in Kraków [PDF]
Archives of Environmental Protection, 2023 Road dust should be considered as a secondary source of contamination in the environment, especially when re-suspended. In our study road dust samples were collected from 8 high-capacity urban roads in two districts of Kraków (Krowodrza and Nowa Huta ...
Ewa Adamiec +6 more
doaj +1 more source
Using Fractionation and Diffusion Ordered Spectroscopy to Study Lignin Molecular Weight.
ChemistryOpen, 2019 Recent reports demonstrate that applications of the biopolymer lignin can be helped by the use of a fraction of the lignin which has an optimal molecular weight range.
James R. D. Montgomery +3 more
doaj +1 more source
Frontiers in Physiology, 2017 Purpose: Complex fractionated atrial electrograms (CFAE)-guided ablation after pulmonary vein isolation (PVI) has been used for persistent atrial fibrillation (persAF) therapy.
Tiago P. Almeida +11 more
doaj +1 more source
Fractional Differential Equations and Expansions in Fractional Powers
Symmetry, 2023 We use power series with rational exponents to find exact solutions to initial value problems for fractional differential equations. Certain problems that have been previously studied in the literature can be solved in a closed form, and approximate solutions are derived by constructing recursions for the relevant expansion coefficients.
Diego Caratelli +2 more
openaire +3 more sources
Radiation Oncology, 2011 Background The increased resistance of hypoxic cells to ionizing radiation is usually believed to be the primary reason for treatment failure in tumors with oxygen-deficient areas.
Wenzl Tatiana, Wilkens Jan J
doaj +1 more source
Molecules, 2020 Withania coagulans contains a complex mixture of various bioactive compounds. In order to reduce the complexity of the plant extract to purify its phytochemical biomolecules, a novel fractionation strategy using different solvent combination ratios was ...
Murtaza Hasan +9 more
doaj +1 more source