The efficient biogeneration of Ag and NiO nanoparticles from VPLE and a study of the anti-diabetic properties of the extract

Abstract

Vitex pseudo-negundo leaf extract (VPLE) is used to mediate the green biosynthesis of Ag and NiO nanoparticles in aqueous solutions under mild conditions. The synthesized nanoparticles, with a narrow size range and good distribution, are characterized by means of powder X-ray diffraction (PXRD), Fourier-transform infrared (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM) techniques. SEM and TEM micrographs proved formation of mostly spherical or ellipsoidal nanoparticles with little agglomeration, and the average particle size was less than 20-35 nm for both types of nanoparticle. Then, the protective role of VPLE toward the liver is assessed in streptozotocin-induced diabetic rats. For this purpose, diabetes is induced in rats through the intraperitoneal injection of streptozotocin, and VPLE is administered via oral gavage for 6 weeks. This study suggests that VPLE can ameliorate biochemical and structural changes in the livers of diabetic rats, showing that VPLE can improve the condition of rats with diabetic hepatopathy via a decrease in oxidative stress and an enhancement in the activity of antioxidant enzymes in the liver.

Recovering Nickel‐Based Materials from Spent NiMH Batteries for Electrochemical Applications

“…As shown in Figure 2c, XRD patterns of both nickel and nickel oxide nanoparticles matched with the face‐centered cubic crystal structure. In detail, the lattice planes (111), (200), and (220), corresponding to the face‐centered cubic structure with an fm‐3 m space group, were observed in the diffraction patterns of both Ni and NiO particles (JCPDS‐87‐0712 and JCPDS‐73‐1523), respectively [37,41] . Additional lattice planes, namely (311) and (222), were present for NiO nanoparticles.…”

“…In detail, the lattice planes (111), (200), and (220), corresponding to the face-centered cubic structure with an fm-3 m space group, were observed in the diffraction patterns of both Ni and NiO particles (JCPDS-87-0712 and JCPDS-73-1523), respectively. [37,41] Additional lattice planes, namely (311) and (222), were present for NiO nanoparticles. After Rietveld refinement, the lattice parameters for Ni microparticles were determined to be 3.52 Å.…”

Delivery of anti-cancer and anti-depression doxepin drug by nickel oxide nanoparticles originated from the Cressa nudicaulis plant extract

“…21,22 The vibrational bands due to water molecules were also detected as a broad band around 3400 cm −1 . 17,22–25 After loading of doxepin, new peaks due to drug molecules were detected, as shown in Fig. 1b.…”

Kinetics, Isotherms and Thermodynamic Studies on Removal of Divalent Copper using Mallet Flower Leaf Powder as Bio-Adsorbent

“…Batch desorption studies were performed in order to find whether the copper adsorption on the studied adsorbent is reversible or not. It is seen that the copper adsorption process is irreversible [10][11][12].…”

“…The equilibrium constant values K D , for Cr (VI) on MFLP was calculated at different temperatures by using the Eqs. ( 10) - (12). These values were used to evaluate the thermodynamic parameters using the following equations; The data on rate constant, K D calculated from pseudo-second order reaction equation (Eq.…”