Carboxylated cellulose nanocrystals in semi-interpenetrated network hydrogels and its application in water absorption and antibiotic removal.

The water scarcity crisis is currently deepened by the presence of emerging contaminants, such as amoxicillin (AMX), threatening ecosystems and living beings due to their toxicity and bioaccumulation. Due to this, in the present study, superabsorbent hydrogels reinforced with oxidized cellulose nanocrystals (CCNC) were developed, forming semi-interpenetrated networks with poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS). The CCNCs were obtained by acid hydrolysis and subsequent chemical oxidation to introduce carboxylate groups with two different levels (low and high) of 200 mmol kg (L-CCNC) and 677 mmol kg (H-CCNC), respectively.

Antimicrobial Activity of Leaf Aqueous Extract of (Cav.) Cabrera against Pathogenic Bacteria and Spoilage Yeasts.

The antimicrobial activity of an aqueous extract of the leaves of (cav.) Cabrera against microorganisms of food importance was evaluated. First, the leaf aqueous extract of was characterized, quantifying hydroxycinnamic acids and phenolic compounds.

Ethylene Scavenging Films Based on Ecofriendly Plastic Materials and Nano-TiO: Preparation, Characterization, and In Vivo Evaluation.

It is known that ethylene plays an important role in the quality characteristics of fruits, especially in storage. To avoid the deterioration of fruits caused by ethylene, titanium dioxide (TiO) has been used due to its photocatalytic capacity. The aim of this study was to develop films based on two types of biopolymers, Mater-Bi (MB) and poly-lactic acid (PLA), with nanoparticles of TiO and to determine their ethylene removal capacity and its application in bananas.

Study of Ethylene-Removing Materials Based on Eco-Friendly Composites with Nano-TiO.

Ethylene is a phytohormone that is responsible of fruit and vegetable ripening. TiO has been studied as a possible solution to slowing down unwanted ripening processes, due to its photocatalytic capacity which enables it to remove ethylene. Thus, the objective of this study was to develop nanocomposites based on two types of eco-friendly materials: Mater-Bi (MB) and poly(lactic acid) (PLA) combined with nano-TiO for ethylene removal and to determine their ethylene-removal capacity.

Development of Inclusion Complexes With Relative Humidity Responsive Capacity as Novel Antifungal Agents for Active Food Packaging.

Allyl isothiocyanate is an excellent antimicrobial compound that has been applied in the development of active food packaging materials in the last years. However, the high volatility of this compound could prevent a lasting effect over time. In order to avoid this problem, cyclodextrin inclusion complexes have been proposed as an alternative, being beta-cyclodextrin (β-CD) as the main candidate.

Obtaining Active Polylactide (PLA) and Polyhydroxybutyrate (PHB) Blends Based Bionanocomposites Modified with Graphene Oxide and Supercritical Carbon Dioxide (scCO)-Assisted Cinnamaldehyde: Effect on Thermal-Mechanical, Disintegration and Mass Transport Properties.

Bionanocomposites based on Polylactide (PLA) and Polyhydroxybutyrate (PHB) blends were successfully obtained through a combined extrusion and impregnation process using supercritical CO (scCO). Graphene oxide (GO) and cinnamaldehyde (Ci) were incorporated into the blends as nano-reinforcement and an active compound, respectively, separately, and simultaneously. From the results, cinnamaldehyde quantification values varied between 5.

Antifungal and physicochemical properties of inclusion complexes based on β-cyclodextrin and essential oil derivatives.

Inclusion complexes based on β-cyclodextrin (β-CD) and antimicrobial compounds, were prepared by co-precipitation method, and characterized by entrapment efficiency (EE), thermal analysis, X-ray diffraction, H NMR spectroscopy, and water sorption. In addition, experiments associated to evaluate the effect of relative humidity on the release of active compounds and antifungal tests were performed. The analysis evidenced the encapsulation of active compounds into the β-CD structure with EE of 91 ± 4.

An assessment of lactobiopolymer-montmorillonite composites for dip coating applications on fresh strawberries.

Background: The use of biopolymer coatings appears as a good alternative to preserve highly perishable fruits, as well as the environment. Proteins generally produce films with good mechanical properties, although their highly hydrophilic nature limits the use in many applications. Nanoparticles, such as nanoclays, can play a critical role in improving barrier properties.

Characterization of beta-cyclodextrin inclusion complexes containing an essential oil component.

An important issue in food technology is that antimicrobial compounds can be used for various applications, such as the development of antimicrobial active packaging materials. Yet most antimicrobial compounds are volatile and require protection. In the present study, the inclusion complexes of 2-nonanone (2-NN) with β-cyclodextrin (β-CD), were prepared by a co-precipitation method.

Development of an antimicrobial material based on a nanocomposite cellulose acetate film for active food packaging.

Nanocomposites based on biopolymers have been recognised as potential materials for the development of new ecofriendly food packaging. In addition, if these materials incorporate active substances in their structure, the potential applications are much higher. Therefore, this work was oriented to develop nanocomposites with antimicrobial activity based on cellulose acetate (CA), a commercial organoclay Cloisite30B (C30B), thymol (T) as natural antimicrobial component and tri-ethyl citrate (TEC) as plasticiser.