Effect of Fe and Au/Fe nanoparticles on the growth of UH-biosurfactant producing bacteria-Serratia, and the biosurfactant production was studied. Results showed that at a concentration of 1 mg/L of Fe nanoparticle, Serratia colony number increased by 57%, and biosurfactant production increase by 63%. Test result showed that Fe nanoparticles in the range of 1~10 mg/L had a positive impact on the...

nanotechnology has various applications in oil and gas industry such as enhanced oil recovery (eor). the main challenge in using nanoparticles in eor processes is their stability in harsh conditions such as high temperature, high pressure, and intermediate to high salinity. however, most of the recent experimental works have been performed under unrealistic conditions such as the use of distill...

The behavior and toxicity of silver engineered nanoparticles (Ag-ENs) to the mixotrophic freshwater alga Ochromonas danica were examined in the present study to determine whether any other mechanisms are involved in their algal toxicity besides Ag(+) liberation outside the cells. Despite their good dispersability, the Ag-ENs were found to continuously aggregate and dissolve rapidly. When the in...

The aims of this study were to investigate the concentrations and characteristics of nanoparticle exposure at various workplaces. We compared the concentration and characteristics of nanoparticles at nine workplaces of three types; i.e., small laboratories (LAB), large-scale engineered nanoparticle manufacturing workplaces (ENP), and unintended nanoparticle-emitting workplaces (UNP), using real...

Understanding and controlling fluids flow at the microscale is a matter of growing scientific and technological interest. Flow enhancements of water-based nanoparticle dispersions through microscale porous media are investigated through twelve hydrophilic sedimentary rocks with pore-throat radius between 1.2 and 10 μm, which are quantitatively explained with a simple model with slip length corr...

Block copolymer silver nanoparticle composite elastic conductors were fabricated through solution blow spinning and subsequent nanoparticle nucleation. The reported technique allows for conformal deposition onto nonplanar substrates. We additionally demonstrated the ability to tune the strain dependence of the electrical properties by adjusting nanoparticle precursor concentration or localized ...

Nanoparticle toxicology is an emergent field that focuses on establishing the hazards of human exposure to nanoparticles and their potential risk. Accurate assessments of nanoparticles risk involve the investigation of multiple factors such as the nanoparticles parameters, the test system and the cell type. Some nanoparticles may interfere with the toxicity detection assays or the enzymatic act...

In this study, a mixed matrix polyethersulfone/iron-nickel oxide nanoparticle nanofiltration membrane was prepared by the solution casting technique. Polyvinylpyrrolidone was also used as a membrane pore former in membrane fabrication. The effect of iron-nickel oxide nanoparticles concentration in the casting solution on the membrane structure and performance was investigated. Scanning...

A long time ago, Brochard and de Gennes predicted the possibility of significantly decreasing the critical magnetic field of the Fredericksz transition (the magnetic Fredericksz threshold) in a mixture of nematic liquid crystals and ferromagnetic particles, the so-called ferronematics. This phenomenon is rarely measured to be large, due to soft homeotropic anchoring induced at the nanoparticle ...