A general method to spin-label a fatty acid was demonstrated as well as an assay of the effectiveness of methyl 10-undecenoate and the spin-labeled version, against the larvae of Aedes aegypti. The LCs were 66 and 58 μL/120 mL (55 and 48 ppm) respectively, and the LCs were 108 and 90 μL/120 mL (113 and 90) ppm. This shows that the spin-label has very little effect on the larvicidal activity of the compound. This opens the possibility of the use of spin-labeling as a tool to determine mechanisms of larvicidal effectiveness, as it can be employed without altering the system under study.
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http://dx.doi.org/10.1016/j.exppara.2022.108440 | DOI Listing |
The harmonic generation in an indium tin oxide (ITO) thin film induced by a ω + 2ω two-color field (ω is the frequency of a fundamental laser field) is investigated based on the numerical solution of the full-wave Maxwell-paradigmatic-Kerr equations. By changing the topological charge number and the amplitude ratio of the ω and 2ω field components, different photon combination pathways in support of each harmonic generation are distinguished, which are manifested as characteristic tempo-spatial field distributions, doughnut-shaped intensity distributions with different diameters, and spiral phase diagrams with different topological charge numbers. The results here provide a new, to the best of our knowledge characterization method to distinguish the photon combination pathways for each order harmonic generation.
View Article and Find Full Text PDFACS Sens
December 2024
Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, Rome 00133, Italy.
Acta Biomater
December 2024
Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, E-08193 Bellaterra, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Campus UAB, 08913 Bellaterra, Spain. Electronic address:
This study introduces a series of water-soluble radical dendrimers (G0 to G5) as promising magnetic resonance imaging (MRI) contrast agents that could potentially address clinical safety concerns associated with current gadolinium-based contrast agents. By using a simplified synthetic approach based on a cyclotriphosphazene core and lysine-derived branching units, we successfully developed a G5 dendrimer containing up to 192 units of 2,2,6,6-Tetramethylpiperidinyloxy (TEMPO) radical. This synthesis offers advantages including ease of preparation, purification, and tunable water solubility through the incorporation of glutamic acid anion residues.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Cellulose, Paper and Advanced Water Treatments Research Group, Department of Chemical Engineering, Complutense University of Madrid, Avda. Complutense S/N, Madrid, Spain.
The recovery of Co(II), Mn(II), Ni(II), and Cu(II) from black mass e-waste solutions through cellulose nanofibers (CNFs) and nanocrystals (CNCs) was investigated. These materials were synthetized by TEMPO-oxidation followed by high-pressure homogenization, and acid hydrolysis, respectively. The NC characterization included the measurement of consistency, cationic demand, carboxylic content, dissolved amorphous cellulose, and transmittance at λ = 600 nm.
View Article and Find Full Text PDFJ Chem Phys
December 2024
Helmholtz-Institute Münster (IMD-4), Forschungszentrum Jülich GmbH, Jülich, Münster 48149, Germany.
This research elucidates the intricate nature of electronic coupling in the redox-active (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO), commonly utilized in organic radical batteries. This study employs a combination of classical molecular dynamics and various electronic coupling calculation schemes. Within the context of the generalized Mulliken-Hush method, the electronic couplings are investigated via the complete active space self-consistent field approach, in combination with n-electron valence state perturbation theory, to provide an accurate description of both static and dynamic electron correlation as well as using (time-dependent) density functional theory simulations.
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