Browsing by Author "Macedo Fernandes, Margarida Maria"
Now showing items 1-15 of 15
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Bacteria-responsive multilayer coatings comprising polycationic nanospheres for bacteria biofilm prevention on urinary catheters
(2016-01-21)
Article
Open AccessThis work reports on the development of infection-preventive coatings on silicone urinary catheters that contain in their structure and release on demand antibacterial polycationic nanospheres. Polycationic aminocellulose ... -
Bio-sonochemical conversion of fish backbones into bioactive nanospheres
(2015-08-12)
Article
Open Access
Covenantee: SINTEF Fisheries and Aquaculture / VTT Technical Research Centre of FinlandSalmon backbones, co-streams of salmon processing industry, were transformed into stable, odour-free ingredients for cosmetics. First, the backbones were hydrolysed using commercial proteases (Bromelain + Papain, Trypsin, ... -
Biocompounds from rapeseed oil industry co-stream as active ingredients for skin care applications
(2015-10-01)
Article
Open AccessOBJECTIVE: Despite the great number of substances produced by the skincare industry, very few of them seem to truly have an effect on the skin. Therefore, given the social implications surrounding physical appearance, the ... -
Effect of thiol-functionalisation on chitosan antibacterial activity: interaction with a bacterial membrane model
(2013-01-12)
Article
Restricted access - publisher's policyThe antibacterial activity of chitosan modified with the thiol-containing 2-iminothiolane HCl (TC-IMI) and N-acetyl- L -cysteine (TC-NAC) was studied by Langmuir film balance technique using a dipalmitoylphos- phatidylglycerol ... -
Electrospinning of gelatin fibers using solutions with low acetic acid concentration: effect of solvent composition on both diameter of electrospun fibers and cytotoxicity
(Wiley, 2015-03-13)
Article
Open AccessGelatin fibers were prepared by electrospinning of gelatin/acetic acid/water ternary mixtures with the aim of studying the feasibility of fabricating gelatin nanofiber mats at room temperature using an alternative benign ... -
Enzyme multilayer coatings inhibit Pseudomonas aeruginosa biofilm formation on urinary catheters
(2015-01-15)
Article
Open AccessBacteria use a signaling mechanism called quorum sensing (QS) to form complex communities of surface-attached cells known as biofilms. This protective mode of growth allows them to resist antibiotic treatment and originates ... -
Escherichia coli and pseudomonas aeruginosa eradication by nano-penicillin G
(2016-06-09)
Article
Open AccessThe transformation of penicillin G into nano/micro-sized spheres (nanopenicillin) using sonochemical technology was explored as a novel tool for the eradication of Gram-negative bacteria and their biofilms. Known by its ... -
Immobilization of antimicrobial core-shell nanospheres onto silicone for prevention of Escherichia coli biofilm formation
(2016-09-16)
Article
Open AccessEscherichia coli (E. coli) strains are among the most frequently isolated microorganisms in urinary tract infections able to colonize the surface of urinary catheters and form biofilms. These biofilms are highly resistant ... -
One-step sonochemical preparation of redox-responsive nanocapsules for glutathione mediated RNA release
(Royal Society of Chemistry, 2014-07-09)
Article
Restricted access - publisher's policyEfficient RNA delivery to targeted cells requires the use of stable interactive carriers that provide RNA protection during the extracellular transit and trigger release once internalised. One strategy to avoid the premature ... -
Quorum-quenching and matrix-degrading enzymes in multilayer coatings synergistically prevent bacterial biofilm formation on urinary catheters
(2015-12-02)
Article
Open AccessBacteria often colonize in-dwelling medical devices and grow as complex biofilm communities of cells embedded in a self-produced extracellular polymeric matrix, which increases their resistance to antibiotics and the host ... -
Rapeseed protein-derived bioactive peptides: production, processing and potential health benefits
(NOVA Publishers, 2016-01-28)
Book
Open AccessRapeseed is the traditional name of a large winter or spring annual oilseed crop from the Brassicaceae family, and is related to mustard, cabbage, broccoli, among others. As one of the leading oilseed crops, rapeseed is ... -
Size and aging effects on antimicrobial efficiency of silver nanoparticles coated on polyamide fabrics activated by atmospheric DBD plasma
(2015-06-09)
Article
Open AccessThis work studies the surface characteristics, antimicrobial activity, and aging effect of plasma-pretreated polyamide 6,6 (PA66) fabrics coated with silver nanoparticles (AgNPs), aiming to identify the optimum size of ... -
Sonochemical coating of textiles with hybrid ZnO/chitosan antimicrobial nanoparticles
(2014-01-09)
Article
Restricted access - publisher's policyTextiles are good substrates for growth of microorg anisms especially under moisture and temperature conditions found in hospitals. Microbia l shedding from the body occurs continuously at contact of the patient with ... -
Sonochemically processed cationic nanocapsules: Efficient antimicrobials with membrane disturbing capacity
(2014-03-08)
Article
Restricted access - publisher's policyBacterial-mediated diseases are a major healthcare concern worldwide due to the rapid spread of antibiotic-resistant bacteria. One strategy to manage the bacterial infections while avoiding the emergence of resistant strains ... -
Tannic Acid NPs - Synthesis and immobilization on to a solid surface in a one – step process and their antibacterial and anti-inflammatory properties
(2013-12-14)
Article
Restricted access - publisher's policyTannic acid nanoparticles were synthesized from an aqueous solution without the use of stabilizers via a sonochemical process. In order to avoid the dissolution of the formed nanoparticles, the sonochemical reaction was ...
