Results 41 to 50 of about 1,927,401 (335)

Comparison and thermodynamic studies on complexation of adrenaline with some metal ions in mixed solvents

open access: yesMain Group Metal Chemistry, 2012
Two methods are described for the determination of stability constants of adrenaline with metal ions. In method A, the solution equilibria of Al(III) complex formed with bidentate ligand of adrenaline in acidic media at pH ranges of ≈3 to ≈5 have been ...
Gh Azar Bagheri, Gangtalab Masome
doaj   +1 more source

Effect of Extraction Conditions on the Phenolic Content and DPPH Radical Scavenging Activity of Hypericum perforatum L.

open access: yesTurkish Journal of Agriculture: Food Science and Technology, 2020
In this study, various extracts of Hypericum perforatum L. were investigated in terms of their extraction yields. For this purpose, five solvent systems including 70%EtOH-30% H2O (A), 50%EtOH-50% H2O (B), 30%EtOH-70% H2O (C), 100% EtOH (D), and 100% H2O (
Fadime Seyrekoğlu, Hasan Temiz
doaj   +1 more source

Network topology drives population temporal variability in experimental habitat networks

open access: yesPopulation Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu   +3 more
wiley   +1 more source

Comparison of the Use of Traditional Solvents and Nanosecond 213 nm Nd:YAG Laser in Thinning Naturally Aged Varnish on a Contemporary Oil Easel Painting

open access: yesHeritage, 2023
The removal of aged varnish on artistic paintings is a delicate intervention and the use of UV laser for this purpose is of special relevance. In particular, the use of nanosecond-pulsed lasers operating at 213 nm has been noted to produce good results ...
Marina Martínez-Weinbaum   +5 more
doaj   +1 more source

Application of the level-set method to the implicit solvation of nonpolar molecules

open access: yes, 2008
A level-set method is developed for numerically capturing the equilibrium solute-solvent interface that is defined by the recently proposed variational implicit solvent model (Dzubiella, Swanson, and McCammon, Phys. Rev. Lett. {\bf 104}, 527 (2006) and J.
Allen M. P.   +8 more
core   +1 more source

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

open access: yesPopulation Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

A short review about oil hydrogenation and its implementation in a supercritical process: sunflower oil case

open access: yesGrasas y Aceites, 2002
With 25 millions tons per year, the hydrogenated oil production is on the top in the food market. In this review we deal with the sunflower seed oil hydrogenation with special attention to the economy of the product, the reaction kinetic and parameters ...
Nancy Ajzenberg
doaj   +1 more source

Choosing an Optimal Solvent Is Crucial for Obtaining Cell-Penetrating Peptide Nanoparticles with Desired Properties and High Activity in Nucleic Acid Delivery

open access: yesPharmaceutics, 2023
Cell-penetrating peptides (CPPs) are highly promising transfection agents that can deliver various compounds into living cells, including nucleic acids (NAs).
Abhijit Biswas   +10 more
doaj   +1 more source

Hydrophobic Polyelectrolytes in Better Polar Solvent. Structure and Chain Conformation as seen by Saxs and Sans [PDF]

open access: yes, 2009
We demonstrate in this paper the influence of solvent quality on the structure of the semi-dilute solution of a hydrophobic polyelectrolyte, partially sulfonated Poly-Styrene Sulfonate.
Boué, François   +3 more
core   +3 more sources

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

open access: yesPopulation Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

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