56 documents found, page 1 of 6

The absence of albumin improves in vitro cellular uptake and disruption of Polo...

Novel nanoparticles based on Poloxamer 407 and vegetable oil were produced by high pressure homogenization. Functionalization of those nanoparticles was made by incorporation of folic acid (FA)-Poloxamer 407 conjugate. These nanoparticles showed suitable characteristics for intravenous therapeutic applications similarly to PEGylated albumin-based nanoparticles, previously described by our research group. Here, ...

Polymeric materials for metal sorption from hydric resources

Pure water is crucial for global population. However, a wide range of industrial activities contribute to its pollution. Among the pollutants, heavy metals are of high concern. Thus, it is crucial remove these pollutants from water for the population consumption. Several physical and chemical methods, such as chemical precipitation, filtration, coagulation, membrane processes, ion exchange, and adsorption are a...

Interaction of fluorescent quinolin-2-one and coumarin derivatives including di...

The photophysical properties of two quinolin-2-one and two coumarin derivatives, a 3-amino-4-phenylquinolin-2-one 1, a N-(tert-butyloxycarbonyl)amino-4-phenylcoumarin 2, and the dipeptides 3 and 4 bearing the quinolin-2-one or the coumarin moiety, respectively, synthesized earlier by some of us, were studied in solvents of different polarity. Compounds 1 and 2 show a moderate solvent sensitive emission, quinoli...

Ultrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate)

The present work explores the best conditions for the enzymatic synthesis of poly (ethylene glutarate) for the first time. The start-up materials are the liquids; diethyl glutarate and ethylene glycol diacetate, without the need of addition of extra solvent. The reactions are catalyzed by lipase B from Candida antarctica immobilized on glycidyl methacrylate-ter-divinylbenzene-ter-ethylene glycol dimethacrylate ...

Enzymatic synthesis of poly(catechin)-antibiotic conjugates: an antimicrobial a...

Biofilm formation in urinary indwelling catheters is one of the most critical issues that patients face. Catheters were coated with poly(catechin)-antibiotic conjugates with enhanced antimicrobial properties. Catechin was conjugated with two antibiotics, namely trimethoprim (TMP) and sulfamethoxazole (SMZ) via activation with N,N′-disuccinimidyl carbonate (DSC) and subsequent coupling to molecules containing α-...

Functionalized protein nanoemulsions by incorporation of chemically modified BSA

The incorporation of bioactive compounds in stealth nanoparticles or nanoemulsions enhances their half-life in systemic circulation and can overcome the problems associated with the free drug. Bovine serum albumin (BSA)-drug conjugates were produced with either methotrexate (MTX), a potent anticancer agent, or vancomycin (VCM), a potent antibiotic. Those conjugates were used to produce functionalized BSA nanoem...

Influence of polymeric matrix on structural and photoluminescent properties of ...

Poly(2-hydroxyethyl methacrylate): A new star polymer

Multiarm star polymers are attractive materials due to their unusual bulk and solution properties. They are considered analogues of dendrimers with a wide range of applications, such as drug delivery, membranes, coatings and lithography.1 The advent of controlled polymerization made possible the existence of this unique class of organic nanoparticles (ONPs).2 Two major synthetic strategies are usually employed ...

Synthesis and characterization of polystyrene-blockpoly(vinylbenzoic acid): a p...

Using reversible addition-fragmentation chain transfer (RAFT) polymerization, the effect of PSt macroRAFT and 4VBA ratio on the synthesis of a carboxylic acid functional block copolymer (PSt-b-P4VBA) was studied. PSt macroRAFT polymer was initially prepared followed by the insertion of 4-vinylbenzoic acid (4VBA) monomer. The chemical structure of the diblock copolymer was confirmed by NMR and FTIR. The effect o...

Development of cellulose acetate membranes containing nanoparticles for water a...

The growth of human population and inherent activities, the improper industrialization practices, the direct addition of materials TO the waterway, and the excessive use of fertilizers containing phosphates to increase the production of crops are the main sources for the high input of phosphates in water bodies. These effects have been causing eutrophication, and bacterial contamination of the water. In fact, t...