Magnetic chitosan/calcium alginate double-network hydrogel beads: Preparation, adsorption of anionic and cationic surfactants, and reuse in the removal of methylene blue.

Robust and reusable magnetic chitosan/calcium alginate double-network hydrogel beads (CSMAB) with an environmentally benign biocomposite material synthesis approach were used adsorption of surfactant and removal of methylene blue dye sequentially for the first time. Double network hydrogel structure with sodium alginate and chitosan and acidification of the surface with HCl provided the reusability of the beads at the pollutant removal in water. The CSMAB beads were characterized for structural analysis by FESEM, EDX, BET, VSM, and FTIR techniques.

Green Synthesis of Gold Nanoflowers Using and Extracts: Comparative Studies of Their Antimicrobial and Antibiofilm Activities.

This study was concerned with the green synthesis of gold nanoflowers (AuNFs) using the bioactive constituents of (rosemary) and (immortelle) extracts, as reducer and stabilizer agents along with the determination of their antibacterial and antibiofilm activity against , , and . The AuNFs were characterized using STEM, UV-Vis, DLS, ZETA, FESEM-EDX, and FTIR techniques. The antibacterial and antibiofilm activity of the AuNFs were evaluated by microdilution broth and microtiter plate (MTP) tests, respectively.

Green synthesis of allicin based hybrid nanoflowers with evaluation of their catalytic and antimicrobial activities.

Objective: Although organic-inorganic hybrid nanoflowers (hNFs) with much enhanced catalytic activity and stability were fabricated using proteins and enzymes, in this study, for the first time, we report synthesis of allicin and copper ion (Cu) coordinated NFs and investigate their peroxidase-like and antimicrobial activities.

Results: The allicin (active ingredient of Allium sativum) and Cu was acted as an organic and inorganic part, respectively for synthesis of the Cu-hNFs. The hNFs were characterized by various techniques.

Green synthesis and characterization of iron oxide nanoparticles using Ficus carica (common fig) dried fruit extract.

Ficus carica (common fig) dried fruit extract was used to synthesize iron oxide nanoparticles in this study. Biomaterials in the common fig dried fruit extract synthesized the iron nanoparticles by reducing the iron precursor salt and then acted as capping and stabilizing agents. The nanoparticles were produced smaller than 20 nm diameters and oxidized due to the high phenolic compound content in the common fig dried fruit extract.

Ecophysiological tolerance of Lemna gibba L. exposed to cadmium.

In this study, an experiment was carried out to study the process of stress adaptation in Lemna gibba L. grown under cadmium stress (0-20mg Cd L(-1)). The level of photosynthetic pigments and soluble proteins decreased only upon exposure to high Cd concentrations (for pigments 5mg Cd L(-1); for soluble proteins 10mg Cd L(-1)).

Response of antioxidant defences to Zn stress in three duckweed species.

In the plants, Lemna gibba, Lemna minor and Spirodela polyrrhiza L., the effect of different concentrations of zinc (0.01, 0.

Effect of circulation on wastewater treatment by Lemna gibba and Lemna minor (floating aquatic macrophytes).

In this study, laboratory tests were performed in order to examine growth characteristics of floating aquatic macrophytes (Lemna gibba and Lemna minor) in the presence of wastewater with circulation. The results showed that circulation of the waste water enhanced the kinetics of the process, as compared to the control systems. However, prolonged application of high circulation level had a different effect.

Nickel-induced changes in lipid peroxidation, antioxidative enzymes, and metal accumulation in Lemna gibba.

In this study, an experiment was carried out to study the process of stress adaptation in Lemna gibba grown under nickel stress (0-20 mg Ni L(-1)). The results showed that Ni concentrations in plants increased with increasing Ni supply levels and reached a maximum of 142.82 mg.

Effects of salinity on growth and nickel accumulation capacity of Lemna gibba (Lemnaceae).

The effect of salinization of water on the growth rate and nickel accumulation capacity of Lemna gibba was studied under laboratory conditions. At high salinity (375 and 500 mol m(-3) NaCl), we observed that decreasing growth rate with increasing water salt level. Especially, at a salinity of 500 mol m(-3) NaCl, the net growth rate became negative.