Metal nanoparticles and their polymer based composites for biological applications

Development of novel and innovative routes for metal nanoparticles (Au, Ag and Cu NPs) synthesis, different sizes (5-40 nm), shapes, and surface chemistry which makes them useful in a wide spectrum of applications. Structural, morphological and optical characterization of NPs. The focus on individual and particulary polymer/organic molecules functionalized nanoparticles which are prevented from agglomeration and oxidation, and also have improved physicochemical characteristics and functions.

Evaluation of illumination and time dependent antibacterial and photocatalytic properties of surfaces covered with ZnO/Ag composite nanoparticles

Contact with potentially pathogenic microbes found on different surfaces from everyday items to health care settings (e.g. door handles, medical equipment, near-patient surfaces) may potentially harm our well-being. A promising method to reduce the spreading of unwanted microbes on surfaces is the development of antimicrobial surfaces containing photocatalysts that induce the degradation of organic matter under specific illumination conditions. One suitable class of photocatalysts is

Bacterial Adhesion on Different Materials

Biofilm formation on materials leads to high costs in industrial processes, as well as in medical applications. This fact has stimulated interest in the development of new materials with improved surfaces to reduce bacterial adhesion. Standardized tests relying on statistical evidence are indispensable to evaluate the quality and microbial safety of these new materials. Download a poster:

Biosynthesis of microbial pigments and biopolymers

The widespread use of synthetic dyes raises concerns regarding environmental impact and health issues [1], demanding natural and sustainable alternatives such as microbial pigments, which besides colour, provide other functional properties (antimicrobial activity, antioxidant properties, UV protection, among others). Likewise, the replacement of oil-derived synthetic polymers with natural alternatives is another promising opportunity for microorganisms employment. Nontoxic and biodegradable biopolymers such as Bacterial Cellulose [2]

Novel method for the detection of the ‘wet’ and ‘dry’ status of textiles

Survival and growth of microorganisms in the hospital environment must be limited to prevent infection by cross-contamination. Advances in materials/coatings engineering have made antimicrobial materials/coatings (e.g. porous & non-porous surfaces, textiles) an attractive investment for infection control professionals. Due to presence of moisture being a critical factor for some antimicrobial materials, a knowledge of the time taken for a material to return from ‘wet’ to

Growth conditions assessment for prodigiosin production by Serratia plymuthica

The prodigiosins are red pigments produced by a group of bacteria (originally by Serratia spp) that present certain biological activities, such as: antifungal, antibacterial and anticancer. The pigment prodigiosin is a secondary metabolite of the bacterium and is only expressed in certain culture conditions. Pigment production is highly variable among species and is dependence of many factors such as species type, incubation time, temperature, growth

Emulsion Electrospun Fiber Mats of PCL/PVA/Chitosan and Eugenol aimed for antimicrobial wound healing applications

In recent years, the damaging effects of antimicrobial resistance relating to wound management and infection have driven the ongoing development of composite wound dressing mats containing natural compounds, such as plant extracts and its derivatives. The present research reports the fabrication of novel electrospun Polycaprolactone (PCL) / Polyvinyl Alcohol (PVA)/ Chitosan (CH) fiber mats loaded with Eugenol (EUG), an essential oil extracted from cloves, known

Ultrasonic coating of medical textiles with antimicrobal nanoparticles

According to European Centre of Disease Prevention and Control (ECDC), every year 5-6% of patients come to nosocomial infections. Due to rapid spreading of superbacteria, resistant to any antibiotics the situation is becoming serious. Decreasing of the number of hospital infections can be obtained by using anitibacterial coatings at textiles. Textiles should be antibacterial, coating durable and not harmful for patients. There are plenty of

Functionalization of polydimethylsiloxane and stainless steel surfaces with disinfectants

Microbial adhesion onto surfaces is at the root of serious problems in many areas, often compromising the disinfection practices. In clinical settings, microorganisms can colonize abiotic surfaces, equipment and medical devices. This problem is aggravated when microorganisms adopt a sessile lifestyle and live in biofilms. The best approach to prevent the occurrence of cell adhesion and biofilm formation, with subsequent spread of microorganisms between equipment

Equisetum arvense mediated synthesis of silver nanoparticles and its application as antibacterial suspension

High consumption of antibiotics has led to resistance of pathogenic microorganisms, which prompted the testing of antimicrobial activity of various plant extracts or other substances in order to find new antimicrobial agents. Alternatively, silver and silver-based topical dressings have been used to treat bacterial infections. To overcome the problems associated with the excessive usage of antibiotics and chemicals, there is a need of eco-friendly synthesis