Antioxidant effects and compatibility of zinc oxide nanoparticles during in vitro maturation of bovine oocytes and subsequent embryo development.

Zinc oxide nanoparticles (ZnO-NPs) have garnered significant attention in biological applications due to their known antioxidant properties. However, their potential impact on assisted reproduction techniques remains largely unexplored, particularly in the context of oocyte quality maintenance within in vitro culture systems, where free radicals can exert detrimental effects. This study investigated the effects of incorporating ZnO-NPs to in vitro maturation (IVM) media on the developmental, cryosurvival, and metabolic profiles of bovine embryos.

Antimicrobial potential of linear low-density polyethylene food packaging with Ag nanoparticles in different carriers (Silica and Hydroxyapatite).

Silver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.

Modified Silica Nanoparticles from Rice Husk Supported on Polylactic Acid as Adsorptive Membranes for Dye Removal.

Industrial effluents and wastewater treatment have been a mainstay of environmental preservation and remediation for the last decade. Silica nanoparticles (SiO) obtained from rice husk (RH) are an alternative to producing low-cost adsorbent and agriculture waste recovery. One adsorption challenge is facilitating the adsorbate separation and reuse cycle from aqueous medium.

CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support: photocatalysis, cytotoxicity, and antimicrobial response.

Photocatalysts supported in magnetic nanocomposites for application in environmental remediation processes have been evaluated for removing contaminants due to easy recovery and low toxicity to the ecosystem. In this work, copper oxide (CuO) nanoparticles with photocatalytic properties were decorated on magnetic support constituted by hydroxyapatite (HAP) and ferrite to achieve efficiency in contaminated water remediation under visible light irradiation. First, nanomaterials were obtained by precipitation route, allowing fast and straightforward synthesis.

Potential of NbO nanofibers in photocatalytic degradation of organic pollutants.

Various photocatalytic nanomaterials for environmental remediation have been promoted due to the pollution caused by different organic pollutants. In this study, NbO nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated NbO nanofibers with orthorhombic phase formation.

Influence of terbium (III) ions on the photocatalytic activity of TiO and CeO for the degradation of methylene blue in industrial effluents.

This study reports the preparation of TiO and CeO doped with different quantities of terbium and discusses the influence of this dopant on the photocatalytic activity of the semiconductors, with respect to the degradation of methylene blue, under ultraviolet and solar radiations. The oxides obtained were characterized by X-ray diffraction, infrared vibrational spectroscopy, diffuse reflectance spectroscopy, scanning electron microscopy, and dispersive energy spectroscopy. The results indicate that the presence of the dopant in TiO favored the formation of the anatase crystalline phase to the detriment of rutile, increased the band gap energy, and decreased the size of the nanoparticles.

NbO nanoparticles decorated with magnetic ferrites for wastewater photocatalytic remediation.

Nanotechnology has been studied on environmental remediation processes to foster greater photocatalysts efficiency and reuse in wastewater. This study investigated the photocatalytic efficiency and viability of niobium pentoxide (NbO) nanoparticles decorated with magnetic ferrite (cobalt ferrite (CoFeO) or magnesium ferrite (MgFeO)) for atrazine photodegradation. Thus, the decorated NbO was synthesized by the polymeric precursor method, forming nanoparticles with sizes ranging from 25 to 50 nm.

Effect of tungsten doping on the structural, morphological and bactericidal properties of nanostructured CuO.

Copper oxide (CuO) has been broadly used in different technological and biological applications. However, based on the literature review, there are few reports describing the synthesis of tungsten doped copper oxide and its biological applications, although CuO and W (tungsten) based nanomaterials have been reportedly already synthesized. In this study we synthesized novel CuO and CuO/W (at.

Photocatalytic degradation of Prozac® mediated by TiO nanoparticles obtained via three synthesis methods: sonochemical, microwave hydrothermal, and polymeric precursor.

Three different synthesis methods were applied to obtain TiO nanoparticles: microwave-assisted hydrothermal (TiO-MW), sonochemical (TiO-US), and polymeric precursor (TiO-PP). The nanoparticles thus obtained presented 93% (TiO-MW) and 92% (TiO-US) anatase phase, and TiO-PP 93% rutile phase. The TiO-US sample performed best during the Prozac® photodegradation assays because of its lipophilic surface, attributable to the C-H groups therein.

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-FeO Nanoparticles.

α-FeO samples were manufactured by means of the polymeric precursor method. The powders were sintered and calcined at temperatures of 300-700 °C for 2 h, respectively. In the X-ray diffraction results, the formation of the rhombohedral phase without secondary phases was exhibited.

The Effect of ZnO Nanoparticles Morphology on the Toxicity Towards Microalgae .

Zinc oxide nanoparticles (ZnO NPs) have been widely employed in technological applications due to their appealing properties for catalytic, optoelectronic and antimicrobial applications. Moreover, ZnO NPs can also be employed in fertilizers as a source of zinc micronutrient, which is a primary element for enzymes and proteins synthesis in plants, allowing their regular growth and improving crop productivity. However, the extensive use of nanoparticles as a source of fertilizers in agricultural activities also raises concerns once nanoparticle features including surface charge, chemical fucntionalittes, size and shape can alter the toxicity of NPs.

Nanoimmobilization of β-glucosidase onto hydroxyapatite.

β-Glucosidase is an enzyme of great industrial interest that is used in biorefineries and in the pharmaceutical, food, and beverage sectors, among others. These industrial processes would benefit from the use of immobilized enzyme systems that allow several reuses of the enzyme. A promising inorganic and nontoxic material for such application is hydroxyapatite (HA), which can be synthesized at nanometric scale, hence providing good accessibility of the substrate to the catalyst.

Investigation of nanotoxicological effects of nanostructured hydroxyapatite to microalgae Pseudokirchneriella subcapitata.

The advance of nanotechnology has enabled the development of materials with optimized properties for applications in agriculture and environment. For instance, nanotechnology-based fertilizers, such as the candidate hydroxyapatite (HAp) nanoparticles (Ca(PO)(OH)), can potentially increase the food production by rationally supplying phosphorous to crops, although with inferior mobility in the environment (when compared to the soluble counterparts), avoiding eutrophication. Nonetheless, the widespread consumption of nanofertilizers also raises concern about feasible deleterious effects caused by their release in the environment, which ultimately imposes risks to aquatic biota and human health.

Polyethylene Films Containing Silver Nanoparticles for Applications in Food Packaging: Characterization of Physico-Chemical and Anti-Microbial Properties.

This paper reports the antibacterial effect and physico-chemical characterization of films containing silver nanoparticles for use as food packaging. Two masterbatches (named PEN and PEC) con- taining silver nanoparticles embedded in distinct carriers (silica and titanium dioxide) were mixed with low-density polyethylene (LDPE) in different compositions and extruded to produce plain films. These films were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC), Thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR).

Layer-by-layer fabrication of AgCl-PANI hybrid nanocomposite films for electronic tongues.

The fabrication of nanostructured films with tailored properties is essential for many applications, particularly with materials such as polyaniline (PANI) whose electrical characteristics may be easily tuned. In this study we report the one-step synthesis of AgCl-PANI nanocomposites that could form layer-by-layer (LbL) films with poly(sodium 4-styrenesulfonate) (PSS) and be used for electronic tongues (e-tongues). The first AgCl-PANI layer was adsorbed on a quartz substrate according to a nucleation-and-growth mechanism explained using the Johnson-Mehl-Avrami (JMA) model, revealing a 3D film growth confirmed by atomic force microscopy (AFM) measurements for the AgCl-PANI/PSS LbL films.

Photolumiscent properties of nanorods and nanoplates Y2O3:Eu3+.

Nanorods and nanoplates of Y(2)O(3):Eu(3+) powders were synthesized through the thermal decomposition of the Y(OH)(3) precursors using a microwave-hydrothermal method in a very short reaction time. These powders were analyzed by X-ray diffraction, field emission scanning electron microscopy, Fourrier transform Raman, as well as photoluminescence measurements. Based on these results, these materials presented nanoplates and nanorods morphologies.