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Purpose: In October 2023, other cases with early silicone oil opacification within hours after intraocular implantation in the absence of emulsification occurred. While multiple, small series of this phenomenon are now documented during the last decade, the cause was never unmasked. In this study, we analyzed explanted patient samples, unused samples of the affected, and a control batch of the same silicone oil.
View Article and Find Full Text PDFGreen chitosan extraction from Hermetia illucens breeding waste (prepupal cases): Characterization and bioadsorption activity.
Int J Biol Macromol
November 2024
Interdisciplinary Laboratory in Bio-Resources, Environment and Materials, Higher Normal School, Cadi Ayyad University, 40000 Marrakech, Morocco.
Heavy metal contamination has harmful consequences for the ecosystem. They are naturally non-biodegradable, and can cause severe ecotoxicity and numerous pathologies. Several bioadsorbents have been used for metal pollution control, and chitosan is one of the biomaterials that has proven to be an efficient adsorbent.
View Article and Find Full Text PDFViscosimetric squeeze flow of suspensions.
Eur Phys J E Soft Matter
March 2024
Université Paris-Saclay, CNRS, Laboratoire FAST, 91405, Orsay, France.
The rheology of particle suspensions has been extensively explored in the case of a simple shear flow, but less in other flow configurations which are also important in practice. Here we investigate the behavior of a suspension in a squeeze flow, which we revisit using local pressure measurements to deduce the effective viscosity. The flow is generated by approaching a moving disk to a fixed wall at constant velocity in the low Reynolds number limit.
View Article and Find Full Text PDFCellulose acetate from lignocellulosic residues: An eco-friendly approach based on a hydrothermal process.
Int J Biol Macromol
July 2023
Department of Biochemistry and Biotechnology, CCE, State University of Londrina, PO Box 6001, 86057-990 Londrina, PR, Brazil. Electronic address:
The objective of this study was to produce cellulose acetate (CA) from oat (OH) and soybean (SH) hulls through an eco-friendly solvent-and catalyst-free hydrothermal process, and also to compare the acetylation of cellulose by the conventional synthesis process, employing sulfuric acid as the catalyst, and acetic acid as solvent. Cellulose was extracted from OH and SH using a one-step chlorine-free process, resulting in materials with 86 and 81 % cellulose, respectively. CA samples obtained by hydrothermal process had degrees of substitution ranging from 0.
View Article and Find Full Text PDFInfluence of Sodium Salicylate on Self-Aggregation and Caffeine Solubility in Water-A New Hypothesis from Experimental and Computational Data.
Pharmaceutics
October 2022
Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia.
The present study analyzed experimental data from volumetric and viscosimetric measurements and computational simulations to understand caffeine hydration and aggregation properties in 0.1 mol∙kg of sodium salicylate aqueous solution. Sodium salicylate reduces the bitter taste and increases the solubility of caffeine in water, which is the main reason for their combination in food products.
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