Effective use of colloid transport models for heterogeneous subsurface porous media requires the development of methodologies to identify the key model parameters. The inverse problem of a two-dimensional model for colloid transport in geochemically heterogeneous porous media is systematically investigated in this paper. Sensitivity analysis prior to the parameter identification provided valuab...

 Nanotechnology presents countless opportunities to develop new and improved consumer products for the benefit of the society . A most prominent nanoproduct is nanosilver. Nanosilver particles are generally smaller than 100 nm and contain 20–15,000 silver atoms. Despite the wide application of nanomaterials, there is a serious lack of information concerning their impact on human health. In the ...

The blue triangle nanosilver (BAgNP) sol was prepared by the two reducers of NaBH4 and H2O2. Using BAgNP as the precursor, a small spherical nanosilver (AgNP) sol in yellow was synthesized by addition of suitable amounts of X (-) (X = Cl, Br, and I). The oxidization process of BAgNP to AgNP was studied in detail by resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS), l...

The stable yellow nanosilver (AgNP) and blue nanosilver (AgNPB) sols were prepared by the NaBH4 procedure. The new nanocatalytic reaction of AgNP-NaCl-H2O2 was investigated by surface plasmon resonance (SPR) absorption, resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS) and scanning electron microscope (SEM) techniques. The autocatalytic oxidization of Ag on AgNP surf...

familial colloid cyst of the third ventricle is very rare. this is one of the two largest families reported and the first in which all affected members are siblings. one asymptomatic sister was found by screening, emphasizing the value of screening. a brother and two sisters from a family consisting of three brothers and three sisters who were diagnosed as having colloid cyst of the third ventr...

residual microorganisms in the root canal system (rcs) after endodontic therapy such as candida albicans are a major cause of endodontic failure. calcium hydroxide (ch) and chlorhexidine (chx) have suitable antimicrobial activity against bacteria and can be used as intracanal medicaments. nanosilver has also shown antimicrobial activity against microorganisms. this study aimed to compare the an...

nanotechnology is a new and specific method for therapy of diseases. nanosilver particle is one of the functional fields of nanotechnology. it has been shown that these nanoparticles have antibacterial and antifungal properties. different studied have been shown that nanoparticles may have important role in medicine. for example, it has been shown to have inhibitory effects on the treatment of ...

effect of nanosilver (ns) on the heat-transferring rate to the core section of medium density fiberboard (mdf) mat was studied here. a 400 ppm aqueous nanosilver suspension was used at three consumption levels of 100, 150, and 200 ml/kg, based on the weight of dry wood fibers; the results were then compared with the control mdf panels. the size range of nanosilver was 30-80 nm. results showed t...