An amperometric microbial biosensor for the direct measurement of organophosphate nerve agents is described. The sensor is based on a carbon paste electrode containing genetically engineered cells expressing organophosphorus hydrolase (OPH) on the cell surface. OPH catalyzes the hydrolysis of organophosphorus pesticides with p-nitrophenyl substituent such as paraoxon, parathion and methyl parat...

As a porous brittle material, oil well cement in and gas cementing is difficult to bear complex loads, which can easily lead the failure of mechanical integrity sheath. In this paper, SiO 2 coating-CF toughening material was obtained by modified carbon fibers (CFs) surface. addition, properties mechanism coated-CF stone were discussed. The results showed that paste are significantly improved. A...

This study presents bismuth ferrite nanoparticle (BFO) modified carbon paste electrodes (BFO/CPEs) for the determination of lead and cadmium.

A new sensitive and selective electrochemical sensor was developed for determination of glutathione (GSH) at the surface of carbon paste electrode (CPE) modified with multi-wall carbon nanotubes (MWCNTs) as a sensor and pyrogallol red (PGR) as a mediator. The mechanism of GSH electrochemical behavior at the modified electrode surface was investigated by various electrochemical techniques includ...

The use of 0.6 vol.% single-walled carbon nanotubes in a poly(ethylene glycol)based dispersion gave a thermal paste that was as effective as solder for improving thermal contacts. A thermal contact conductance of 20 · 10 W m K was attained. An excessive amount of nanotubes (e.g. 1.8 vol.%) degraded the performance, because of conformability loss. The nanotubes were more effective than hexagonal...

Abstract In the production process of aluminum electrolytic carbon anode, kneading is to fully mix asphalt and powder obtain best paste, because completed in a high-temperature machine, there no suitable automatic real-time judgment method for uniformity paste. Real-time online monitoring based on viscoelastic change paste during potential judge this paper, Discrete Element Method numerical sim...

We present a rapid low-cost process for fabrication of screen-printed carbon thick-film strain sensors with 0.012% strain resolution. The sensors are suitable for implantation and designed specifically for strain or fullness measurements of the skin and bladder, respectively. Thick-film carbon paste sensors are screen-printed using an etched brass screen onto polydimethylsiloxane (PDMS) and enc...

In this work a new chemically modified carbon paste electrode was constructed for accurate, simple, sensitive and selective determination of molybdenum (VI) ions. The results of modified electrode by an ion imprinted polymer were compared with those obtained with carbon paste electrode. The results showed the stripping peak currents had a dramatic increase at the modified electrode. Under the o...

Abstract The utility of carbon paste electrode for the determination of flavoxate HCl modified with flavoxate-tetraphenylborate (FLX-TPB) and flavoxate-phosphotungestic acid (FLX-PTA) ion-pairs in batch mode is demonstrated. The electrodes revealed a Nernstian response over a wide concentration ranges 1.39×10-5-1x10-2 mol L-1 and1×10-5-1x10-2 mol L-1 using FLX-TPB and FLX-PTA, respectively. The...