Stevia crystal can be defined as a botanical herb that has good properties to use as a substitute for sugar. The electrochemical study has been utilized for the purpose of calculating the limited dosage of the safety that should be used in black tea by cyclic voltammetry (CV) technique using the nanosensor as a more effective glassy carbon electrode (GCE) and carbon nanotubes (CNTs). Stevia’s oxidation current peak has been 400 mV at 0.40 mmol/L concentration (i.e. 28 mg/mL), and reduction current peaks at 600 and –600 mV. It leads to the conclusion that stevia is a limited concentration antioxidant component safe for use in black tea. Additionally, electro-chemical characteristics of the stevia compound in the black tea have been investigated at alkaline and acidic pH in order to give oxidizing behaviors in the alkaline medium, while in an acidic medium as an antioxidant agent in black tea. Other chemical properties such as different scan rates, reliability, and stability have also been investigated.

Rifampicin nanoparticles (RF NPs) was sunthesized by lyophilization method and characterized by using scanning electron spectroscopy (SEM) and atomic force spectroscopy (AFM). It is found that the dimension of the RF NPs was 85.74 nm. An electrochemical measurement approach has been used to examine the effects of various temperature degrees for a range of 30–70 °C on the redox current peaks of RF NPs in the KCl solution as an electrolyte. The results of the electrochemical analysis of RF NPs in KCl solution were obtained by the cyclic voltammetric method to find two oxidation peaks (I,II) at +900 and +225 mV, also two reduction peaks appeared at –680 and –300 mV. They were studied at different temperatures to identify the values of the activation energies (E_a^*) of these peaks by Arrhenius equation as well as their thermodynamic values using the Eyring equation to determine the values of Gibbs activation energy (ΔG*), activation enthalpy (ΔH*), and activation entropy (ΔS*). RF NPs were analyzed through the effect of different temperatures on both the oxidation and reduction peaks, which showed that the high temperature leads to a catalytic state as an electrochemicalcatalyst.

Poor wound treatment impacts millions of humans worldwide, increasing deaths and costs. Wounds have three key complications: (a) a lack of an adequate environment for cell migration, proliferation, and angiogenesis; (b) microbial infection; and (c) unstable and prolonged inflammation.Regrettably, contemporary therapeutic treatments have not entirely tackled these basic difficulties and thus have insufficient medical accomplishment. The incorporation of the extraordinary capabilities of nanomaterials in wound healing has achieved major successes over the years. Nanomaterials can promote a variety of cellular and molecular processes that assist in the wound microenvironment through antibacterial, anti-inflammatory, and angiogenic activities, potentially shifting the surroundings from nonhealing to healing. The current review focuses on novel techniques, with a particular focus on recent revolutionary wound healing and infection control tactics based on nanomaterials, such as nanoparticles, nanocomposites, and scaffolds, which are discussed in depth. Furthermore, the effectiveness of nanoparticles as carriers for therapeutic compounds in wound-healing applications has been investigated which provide researchers an up-to-date sources on the use of nanomaterials and their creative ways that can improve wound-healing uses.