Whilst laboratory-on-chip cell separation systems using dielectrophoresis are increasingly reported in the literature, most systems are afflicted by factors which impede “real world” performance, chief among these being cell loss (in dead spaces, attached to glass and tubing surfaces, or sedimentation from flow), and designs with large channel height-to-width ratios (large channel widths, small...

It has been shown that plasma generated in contact with liquid can be tailored to tune the composition of functionalized liquids. For biomedical applications, it is necessary understand generation treated liquids modulate and thus biological response. In this work, two distinct discharge compositions were realized by modifying location ground electrode a pin-to-liquid system. Through simple mod...

Biochemical computing is an emerging field of unconventional computing that attempts to process information with biomolecules and biological objects using Boolean logic. In this work electrode-immobilized glucose-6-phosphate dehydrogenase enzyme catalyzed a reaction which carries out the Boolean AND logic gate. We report the first experimental realization of a sigmoid shape response in one of t...

The Tickle Talker, an eight-channel electrotactile speech processor, has been developed from continuing research at the University of Melbourne. 'The development of the device has focused on production of reliable speech-processing hardware, design ofcosmetically and ergonometrically acceptable electrode transducers, implementation of acute and chronic biomedical studies demonstrating device sa...

Introduction A number of works on cationic sensors have been reported in literatures [1] but less attention has been given towards the development of anionic sensors though there is a need for analysis of varieties of anions in different environmental, biomedical, industrial as well as chemical samples[2-3]. Anion sensors are simple, low cost, convenient, portable and provide quick response tow...

New ionophores are essential for advancing the art of selective ion sensing. Metal-organic supercontainers (MOSCs), a new family of biomimetic coordination capsules designed using sulfonylcalix[4]arenes as container precursors, are known for their tunable molecular recognition capabilities towards an array of guests. Herein, we demonstrate the use of MOSCs as a new class of size-selective ionop...

A simple method for determining short-chain fatty acids (SCFAs) in rat and human feces was developed using high-performance liquid chromatography with electrochemical detection (HPLC-ECD). A two-channel HPLC-ECD system was fabricated using an ion exclusion column and an electrochemical detector with a glassy carbon working electrode. Aqueous solutions of 0.1 mM HClO(4) and of ethanol containing...

A novel approach for the simultaneous optical and electrochemical detection of biologically produced reactive oxygen species has been developed and applied. The set-up consists of a luminol-dependent chemiluminescence assay combined with two amperometric biosensors sensitive to superoxide anion radicals (O(2)(-)) and hydrogen peroxide (H(2)O(2)), respectively. The method permits direct, real-ti...

A sodium dodecyl sulfate modified carbon paste electrode (SDS/CPE) was developed in this work based on the surface modification method. The modified electrode was prepared by immersing SDS/CPE in a nickel nitrate solution. This electrode showed a strong accumulation ability toward nickel ions. Then modified electrode was conditioned by potential recycling in a potential range of 0.2–0.8 V (vs. ...