Search

Many nanoforms of zinc oxide (ZnO) structures can be synthesized, such as spheres, rods, flowers, disks and walls, as scatter centers in random laser. However, nanoflower and nanowire shapes in this work have received particular interest due to their wide range of applications, including biological, medical cancer cell detection, gas sensors, and biosensors. In this paper, we investigate the optical and morphological properties of two-shaped nanoparticles as scatter centers in the laser active medium on the performance emission of a random laser. Fluorescence and absorption spectra show that 10 − 4 M for R6G dye and 0. 1 8 4 × 1 0 1 3 cm − 3 ZnO NPs are the optimal nanocomposite film concentrations for R6G dye. With excitation energies ranging from 3.44 mJ to 28.34 mJ and a repetition rate of 2 Hz, second-harmonic generation Nd: YAG laser Amplified spontaneous emission (ASE) spectra of the nanocomposite films were observed. The results indicated a minimum bandwidth (Full width at half maximum (FWHM)) of 13 nm at a threshold energy of 8.65 mJ for ZnO NW (nanowire) nanocomposite films at 0. 1 8 4 × 1 0 1 3 cm − 3 with R6G dye at 10 − 4 M and Poly(methyl methacrylate) (PMMA). The ZnO NF (nanoflower) nanocomposite film had an FWHM of 11 nm and a threshold energy of 4.8 mJ at the same concentrations of R6G dye on PMMA. [ABSTRACT FROM AUTHOR]

Taking care of wounds costs a lot of money. A significant medical problem is the treatment of burns, surgical and trauma wounds and skin wounds, with current therapies primarily emphasizing supportive care techniques. Coagulation, inflammation, angiogenesis, new tissue creation and extracellular matrix modification are necessary processes for successful wound healing. Metal oxides (Titanium, Silver, Zinc, Copper, Magnesium, Nickel) with potent antibacterial and healing characteristics can be employed as nanomaterials in dressings. Metal oxide nanoparticles (MeO-NPs) have a wide range of physicochemical properties that allow them to function as antimicrobial agents through a variety of mechanisms. The treatment of lethal infectious diseases will be impacted by the enormous variety of features demonstrated by MeO-NPs. This study covers the antibacterial mechanisms of common MeO-NPs, factors affecting their antibacterial activity and their role in accelerating wound healing. In the current review, an updated mechanism work of the many metal oxide nanoparticles inside the bacterial cell was presented. In addition, the connections between the usage of metal oxide nanoparticles in the medical field were also clarified, with a focus on their function as antimicrobial agents, and the characteristics that affect their antimicrobial response. [ABSTRACT FROM AUTHOR]

Iron oxide-based magnetic nanoparticles (IONPs) have received remarkable attention in a wide range of applications because of their unique physicochemical properties' inheritance to the nanoscale. Among these nanoparticles (NPs), superparamagnetic iron oxide nanoparticles (SPIONs), as powerful noninvasive NPs, are widely used in nanomedicine applications such as targeted drug/ gene delivery, magnetic separation, cancer therapy, and magnetic resonance imaging (MRI) hyperthermia because of their superparamagnetic activity and remarkable small size. The synthesis of SPIONs and surface modification of these NPs for biological applications is an interesting research topic. These NPs have high magnetic susceptibility, a single magnetic domain, and a controlled magnetic behavior due to the SPION superparamagnetic feature. This review aims to explore the recently developed synthetic routes of SPIONs and show the best parameters to prepare SPIONs using pulsed laser ablation in liquid "PLAL" for biomedical applications. Furthermore, we highlight the properties, coating, and functionalization of SPIONs and their importance for biomedical applications, including targeted drug delivery and cancer therapy. The Fe3O4, or superparamagnetic iron oxide nanoparticles (SPIONs), have received considerable attention in a wide range of applications because of their unique physicochemical properties inherent to the nanoscale. These NPs have gained significant benefits due to their unique characteristics, such as superparamagnetic and small size, biocompatibility, biodegradability, nontoxic, efficiently cleared from the human body through iron metabolism pathways, physicochemical properties, drug conjugation/release, scaled up syntheses, and, hence, optimizing the overall parameters for effective medical performance. Various methods are used to synthesize SPION, such as pulsed laser ablation in liquid "PLAL", gas phase deposition, chemical co-precipitation and hydrothermal synthesis. [ABSTRACT FROM AUTHOR]

Recently, there has been a strong interest in nanoparticles (NPs) and their use in a wide range of food applications due to their possession of a set of unique physical and chemical properties. In this work, the nanoformulation was synthesized by coating Fe Ion and Zahdi date pit powder (ZDP) by whey protein. This nanosystem was functionalized by folic acid (FA) molecules. The physiochemical characteristics of WPI@Fe-ZDP-FA nanocomposite were evaluated and confirmed by dynamic light scattering (DLS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and radical scavenging activity using DPPH methods. These NPs were added to skim milk and yogurt was produced from it. The effects of this addition on the chemical, physical and sensory properties of yogurt were studied during storage at 5∘C for 28 days. The prepared nanocomposite was used in proportions of 0.25%, 0.5% and 0.75%, respectively. The chemical tests included measuring the percentage of moisture, protein, carbohydrates, fat, and ash, in addition to the total acidity and pH, while the rheological tests included hardness, cohesion and flexibility. A sensory evaluation of the curd parameters was also performed. The curd treatments to which the nanocomposite was added showed a decrease in the level of moisture over the length of the storage period and an increase in the percentage of protein, carbohydrates and ash compared to the control sample that was without the addition. As for the rheological tests, there was a discrepancy in the results of the treatments when compared to the control treatment, as the addition of 0.25% has higher characteristics than all other treatments, especially in the ability to retain water and spontaneous whey excretion. It was more acceptable in terms that the novel WPI@Fe-ZDP-FA nanoformulation greatly improved the characteristics of texture, taste and flavor in yogurt. [ABSTRACT FROM AUTHOR]