In vitro pure culture studies were conducted on three different strains of Escherichia coli (K-12, EPA 00244, and SWEI) to determine the effect of chlorination on catalase activity. In each case, stationary-phase cells exhibited significant (P less than 0.001) reductions in enzyme activity following exposure to chlorine. Mean differences in activity between control and chlorine-stressed cells r...

The S-layer of Bacillus stearothermophilus PV72/p2 shows oblique lattice symmetry and is composed of identical protein subunits with a molecular weight of 97,000. The isolated S-layer subunits could bind and recrystallize into the oblique lattice on native peptidoglycan-containing sacculi which consist of peptidoglycan of the A1gamma chemotype and a secondary cell wall polymer with an estimated...

Due to the importance of nanoparticles stability in industrial applications, in this research, stability of laponite nanoparticles dispersions containing different concentrations of sodium sulfonated polyacrylamide (SPA) was investigated in electrolyte media for oil reservoirs applications. In this regard, effect of parameters such as polymer concentration, temperature, and ionic strength were ...

Shale gas fracturing flowback fluid is produced during shale exploitation, and its complex composition high chloride content result in limited efficiency of conventional technology. In this work, the Co-TiO2 nanotube array (Co-TiO2 NTAs) electrode with chlorine evolution activity was successfully prepared by electrodeposition for treatment containing PAM simulated wastewater. The internal morph...

We report the exceptional finding that NiO, a known electroactive catalyst for reduction of CO2 to CO, can be tuned become an active electrocatalyst formate when chlorine is synthetically incorporated into NiO. The reaction (CO2RR) carried out on chlorine-containing NiO octahedral particles made by solid-state synthesis method yielding Faradaic efficiency (FE) 70 % production at -0.8 V vs. RHE ...

Carbon-13 NMR analysis after chemical reduction has established the following facts with regard to the structures and formation mechanisms of some chlorine-containing polymers that are prepared by free-radical routes. Poly(vinyl chloride) (PVC) contains chloromethyl, 2-chioroethyl, and 2,4-dichloro-n -butyl branches, as well as long branch structures. Tertiary halogen is present at all of the b...

Four pharmaceuticals (ranitidine, nizatidine, doxylamine, and carbinoxamine) were selected as model compounds to assess the efficiency of four oxidants (ozone (O3), chlorine (Cl2), chlorine dioxide (ClO2) and potassium permanganate (KMnO4)) on the removal of amine-based pharmaceutical and personal care products (PPCPs), as well as the reduction of their N-Nitrosodimethylamine formation potentia...

this radionuclide is almost exclusively produced from the decay of its parent 99mo. 99mtc is themost available and important nuclide used as a diagnostic agent in nuclear medicine. to develop anewly practical 99mtc generator using ( n,y ) 99mo, an inorganic polymer adsorbent has beendeveloped framed with oxygen-zirconium-chlorine bonds with a high adsorption of mo, thepolyzirconium adsorbent wa...