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Anna Costa published an article in March 2018.
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195 shared publications
184 shared publications
Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4,I-40136 Bologna,Italy
143 shared publications
130 shared publications
127 shared publications
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(1977 - 2018)
(1977 - 2018)
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Article 0 Reads 0 Citations Coatings made of proteins adsorbed on TiO2 nanoparticles: a new flame retardant approach for cotton fabrics Published: 15 March 2018
Cellulose, doi: 10.1007/s10570-018-1745-z
A novel durable intumescent flame retardant coating, based on metal oxide nanoparticles (NPs) and biomacromolecules, was designed and applied on cotton fabrics. Specifically, different TiO2 NPs/proteins systems were deposited by dip-pad-dry-cure process and the morphology of the resulting coating were assessed by SEM analysis. Enhancement of durability (i.e. resistance to washing treatments) was verified by release tests carried out in static and dynamic conditions. Flammability and cone calorimetry tests were performed for evaluating the fire behavior of the treated fabrics. More specifically, in horizontal flame spread tests, the different nanoparticle/protein based coatings provided an increase of the total burning time and a decrease of the burning rate. Furthermore, the residues at the end of the test were significantly higher with respect to untreated cotton fabric. In particular, casein-based systems seemed to be more effective as compared to the whey proteins counterparts. Cone calorimetry tests showed better fire performances for the coatings based on TiO2/caseins with respect to TiO2/whey proteins, which did not seem to be so effective in protecting the underlying fabric from the heat flux. Therefore, due to their high char-forming character, casein-based coatings may represent an effective and durable fire-resistant finishing alternative to standard flame retardant treatments for cotton.
Article 0 Reads 2 Citations Nanoencapsulation techniques as a “safer by (molecular) design” tool Published: 01 February 2018
Nano-Structures & Nano-Objects, doi: 10.1016/j.nanoso.2016.03.006
Highlights•We investigated two encapsulation techniques as safer by molecular design approach.•Silica coated TiO2 and Ag nanophases were produced and characterized.•Nanomatrices and core–shell nanocapsules structures were identified.•The feasibility of a cost-effective colloidal approach was demonstrated. AbstractDesigning safer materials is one of the main challenges in the world of nanotechnology because of the potential risks arising from nanomaterial production, use and disposal. In this work, two nanoencapsulation techniques are investigated and proposed as a “safer by (molecular) design” strategy for controlling and harmonizing the biological reactivity of silver and TiO2 nanoparticles. SiO2 coatings were applied to silver and TiO2 nanoparticles and the feasibility of two different encapsulation techniques, a colloidal approach and chemical synthesis nucleation, were compared. Nanomatrices and core–shell nanocapsules were obtained and thoroughly characterized in terms of their wet physicochemical features (particle size distribution and ζζ-potential measurements) and TEM morphology. The colloidal and morphological identification of the samples produced served as a basis for assessing their biological reactivity (reported in subsequent publications). Graphical abstract
Article 0 Reads 0 Citations Detection of viable but non-culturable legionella in hospital water network following monochloramine disinfection Published: 01 September 2017
Journal of Hospital Infection, doi: 10.1016/j.jhin.2017.09.006
Prevention of legionellosis remains a critical issue in healthcare settings where monochloramine (MC) disinfection was recently introduced as an alternative to chlorine dioxide in controlling Legionella spp. contamination of the hospital water network. Continuous treatments with low MC doses in some instances have induced a viable but non-culturable state (VBNC) of Legionella spp.
Article 0 Reads 0 Citations The rate of Legionella pneumophila colonization in hospital hot water network after time flow taps installation Published: 01 September 2017
Journal of Hospital Infection, doi: 10.1016/j.jhin.2017.08.021
In hospital water systems legionellae may be resistant to disinfectants in pipework, which is a problem particularly in areas where there is low flow or stagnation of water. We evaluated legionella colonization of a water network of an Italian hospital after time flow taps (TFTs) installation in proximity to dead legs. The water volume flushed was 64 L/day from May 2016, and 192 L/day from December 2016. Before TFTs installation, Legionella pneumophila sg2-14 was detected in all points (4 × 104 ± 3.1 × 104 cfu/L). All sites remained positive (2.9 × 104 ± 1.9 × 104 cfu/L) through November 2016. From December 2016 legionella persisted in one point only (2 × 102 to 6.8 × 103 cfu/L). TFTs with chemical disinfection may reduce legionella colonization associated with dead legs.
Article 0 Reads 0 Citations Serum YB-1 (Y-box binding protein 1) as a biomarker of bone disease progression in patients with breast cancer and bone ... Published: 01 March 2017
Journal of Bone Oncology, doi: 10.1016/j.jbo.2017.01.002
YB-1 (Y-box binding protein 1) is a multifunctional cold-shock protein that has been implicated in all hallmarks of cancer. Elevated YB-1 protein level was associated with poor prognosis in several types of cancers, including breast cancer (BC), where it is a marker of decreased overall survival (OS) and distant metastasis-free survival across all subtypes. YB-1 is also secreted by different cell types and may act as an extracellular mitogen; however the pathological implications of the secreted form of YB-1 (sYB-1) are unknown. Our purpose was to retrospectively evaluate the association between YB-1 measured by ELISA in serum and disease characteristics and outcomes in patients with BC and bone metastases (BM). In our cohort, sYB-1 was detected in the serum of 22 (50%) patients, and was associated with the presence of extra-bone metastases (p=0.044). Positive sYB-1 was also associated with faster bone disease progression (HR 3.1, 95% CI 1.09–8.95, P=0.033), but no significant differences were observed concerning OS, and time to development of skeletal-related events. Moreover, patients with positive sYB-1 also had higher levels of IL-6, a known osteoclastogenic inducer. Therefore, detection of sYB-1 in patients with BC and BM may indicate a higher tumor burden, in bone and extra-bone locations, and is a biomarker of faster bone disease progression.
Article 0 Reads 0 Citations Synthesis, structure and physical properties of luminescent Pr(III) β -diketonate complexes Published: 01 February 2017
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, doi: 10.1016/j.saa.2016.06.025
Highlights•Three Pr3 + complexes with a highly fluorinated β-diketonate ligand were synthesized.•The [Pr2(fod)6(H2O)·H2O] dimer displays antiferromagnetic behavior.•The Pr3 + dimer showed a rare irreversible solid-to-solid transition.•Two of the complexes only showed visible emission from Pr3 + due to OH quenching.•NIR emission from 1D2 state was attained for the complex with bathophenanthroline. AbstractNear infrared lanthanide(III)-based light conversion molecular devices (LCMDs) are emerging as a promising class of materials for organic light-emitting diodes (OLEDs) in some niche technologies. Three of these molecular materials -two highly coordinated Pr3+β-diketonate monomers and a dimer- are presented and their structure and properties are discussed. Particular emphasis is placed on the solid-to-solid transformation observed for the homodinuclear compound. Graphical abstract