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pH-dependent mechanism of nitric oxide release in nitrophorins 2 and 4
(American Chemical Society, 2009-01)
Nitrophorins are NO carrier proteins that transport and release NO through a pH-dependent conformational change. They bind NO tightly in a low pH environment and release it in a higher pH environment. Experimental evidence ...
Disaggregation kinetics of a peat humic acid: mechanism and pH effects
(American Chemical Society, 2002-12)
Fluorescence correlation spectroscopy was used to study the disaggregation kinetics of a peat humic acid (PPHA) at several pH. FCS measures diffusion coefficients of fluorescent molecules and aggregates, thus allowing for ...
EDTA modified LDHs as Cu2+ scavengers: Removal kinetics and sorbent stability
(Academic Press Inc Elsevier Science, 2009-03)
EDTA modified layered double hydroxides (LDHs) were investigated as potential sorbents to remediate heavy metals pollution. The polidentate ligand was introduced by an exchange method in a Zn-Al-LDH, which takes place with ...
Mass transfer kinetics and diffusion coefficient estimation of bioinsecticide terpene ketones in LDPE films obtained by supercritical CO2-assisted impregnation
(John Wiley & Sons Inc, 2017-12)
Release kinetics of thymoquinone and R-(+)-pulegone impregnated in low-density polyethylene (LDPE) films into air and the effect of supercritical CO2-assisted impregnation process on the diffusional properties of these ...
Control of the mobilization of arsenic and other natural pollutants in groundwater by calcium carbonate concretions in the Pampean Aquifer, southeast of the Buenos Aires province, Argentina
(Elsevier, 2019-07)
The water supply for human consumption in the Chaco-Pampean region in Argentina is restricted by the low quality of groundwater due to elevated concentrations of arsenic and other trace elements. Previous studies indicated ...
Temperature-Scanning Method for the kinetic studies of CO oxidation over ceria-zirconia supported gold catalysts
(ELSEVIER SCIENCE SA, 2015-12-15)
The experimental data of CO oxidation over the series of 2 wt.% Au/Ce1-xZrxO2 (x=0, 0.25, 0.5, 0.75, 1) catalyst were analyzed using a variation of the Temperature Scanning Method with the aim of catalyst's composition ...
N-alkylation of poloxamines modulates micellar assembly and encapsulation and release of the antiretroviral efavirenz
(Elsevier Science, 2010-09)
Poloxamines (X-shaped poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) diblocks connected to a central ethylenediamine group) were N-methylated and N-allylated with the aim of widening their versatility as drug ...
Polyvinyl alcohol-pectin cryogel films for controlled release of enrofloxacin
(Humana Press, 2012-07)
The release of enrofloxacin entrapped in polyvinyl alcohol (PVA) cryogel at pH 5.5 showed a first-order kinetic, releasing 69.7% of the antibiotic after 4.5 h at 37 °C. In order to slow down the fluoroquinolone release ...
Adsorption/desorption study of antibiotic and anti-inflammatory drugs onto bioactive hydroxyapatite nano-rods
(Elsevier Science, 2019-06-23)
The use of high doses of antibacterial and anti-inflammatory drugs for patients with bone diseases, associated to implants or bone filling, can develop adverse effects; and consequently, it promotes to think new strategies ...
Multi-kinetic release of benznidazole-loaded multiparticulate drug delivery systems based on polymethacrylate interpolyelectrolyte complexes
(Elsevier Science, 2018-07-23)
Interpolyelectrolyte complexes (IPEC) formulated as multiparticulate drug delivery systems (MDDS) are interesting carriers to improve drug’ performance. Benznidazole (BZ) is the first–line drug for Chagas treatment; however, ...