Papers – Page 25 – TechConnect Briefs

Antibacterial activity and intracellular accumulation of silver nanoparticles on Escherichia coli K-12

Choi Y.J., Lee B.-T., Kim K.W., Chung K.H., Song W.K., Gwangju Institute of Science and Technology, KR

We exposed Escherichia coli K-12 to engineered silver nanoparticles (AgNPs) on to understand the antibacterial activities of AgNPs. Optical density measurement by UV-Vis was used to determine the growth inhibition of AgNPs and silver ions. [...]

Toxicity of Titanium Dioxide Nanoparticles on Growth Kinetics of Activated Biomass

Das P., Bagdiya N., Kumar A., IIT Delhi, IN

The objective of this study was to study the effect of titanium dioxide (TiO2) NPs on growth kinetic parameters of aerobic sludge bacteria. TiO2 NPs (2 mg/L and 20 mg/L concentrations) were exposed to activated [...]

An investigation on the aggregation phenomena of Titanium dioxide nanoparticles in natural waters: role of ionic strength, organic matter and natural colloidal particles

Romanello M., Luppi V.A., Bertini L., Fidalgo de Cortalezzi M., Instituto Tecnológico de Buenos Aires, AR

The aggregation behavior of TiO2 nanoparticles under conditions normally encountered in natural waters was investigated. Aggregation kinetics and size distribution was determined by DLS using a Nanosizer ZS, Malvern, UK. SEM images were also collected. [...]

Uptake and Elimination Behaviors of Polyethyleneimine (PEI)-Coated Multi-Walled Carbon Nanotubes by Eisenia Foetida and Daphnia Magna

Petersen E.J., Pinto R.A., Mai D.J., Landrum P.F., Zhang L., Huang Q., Shi X., Weber Jr W.J., National Institute of Standards and Technology, US

Hyphenated mass spectrometry (gas chromatography/mass spectrometry) techniques have been employed as one of the primary analytical tools for investigating the effects of ionizing radiation, chemical/biological carcinogens and oxygen derived free radicals on the induction and [...]

Nanomaterial Registry: An authoritative resource for assessing environmental and biological interactions of nanomaterials

Ostraat M.L., Mills K., Murry D., Guzan K., RTI International, US

Assessing the interactions of nanomaterials with environmental and biological systems is both complex and rapidly evolving. The complexity of these interactions arises from the fact that they are not only a function of the system [...]

Quantifying the origin of nanosilver ions and their antibacterial activity

Sotiriou G.A., Meyer A., Knijnenburg J., Panke S., Pratsinis S.E., Particle Technology Laboratory, ETH Zürich, CH

Nanosilver is prominent in nanotechnology products [1]. Concerns however about leached Ag ions from its surface into aquatic environments have challenged its broad use. The origin of these ions is explored here by conditioning the [...]

Ceria Nanopartciles Reduce Disease Severity in a Mouse Model of Multiple Sclerosis

DeCoteau W., Heckman K., Reed K., Erlichman J.S., St. Lawrence University, US

Multiple sclerosis affects 300,00 people in the United States alone with 400 additional cases diagnosed each week. The first phase of the disease , is a relapse-remitting period where the patients symptoms wax and wane [...]

Molecular Changes in Rat Brain Due to Air Nano Pollution

Ljubimova J.Y., Gangalum P.R., Portilla-Arias J., Patil R., Konda B., Paff M., Markman J., Inoue S., Espinoza A., Chesnokova A., Kleinman M., Holler E., Black K.L., Cedars-Sinai Medical Center, US

Air pollution has been found to cause neurodegeneration, deposition of heavy metals & beta amyloid plaques in the brain. Air pollution constitutes of nanopollutant of different sizes that can enter the system and cause diseases. [...]

Ultrastructure of hepatic cells in rabbits after injection of nanoparticles MCS-B

Belousov A.N., Laboratory Applied Nanotechnology, UA

In order to determine ultrastructural reconstructions in hepatic cells under effect of nanoparticles of magnetite (MCS-B), an experiment was conducted on 45 rabbits. Ultrastructural changes in hepatocyte organelles manifested pronounced signs of activation of reparative [...]

Functionalized Self-Assembling Peptides for Immediate Hemostasis and Accelerative Liver Tissue Regeneration

Cheng T.Y., Wu H.C., Chang W.H., Huang M.Y., Lee C.H., Wang T.-W., Department of Materials Science and Engineering, National Tsing Hua University, TW

Traumatic injury or surgery may trigger extensive bleeding. However, conventional hemostatic methods have limited efficacy and may cause surrounding tissue damage. In this study, we use self-assembling peptides (SAPs) and specifically extend fragments of functional [...]