Although the Winkler method is very precise when performed with strict control of pH and iodine concentration, it is still susceptible to errors. For example, ions such as Fe2+ and SO3-, suspended solids, and some organics can produce gross inaccuracies. There have been numerous modifications of the method over the years to compensate for its shortcomings (2). Besides the errors inherent in the...

We have carried out investigations geared toward the fundamental understanding of the transport behavior in planar microfluidic membraneless fuel cells with the intent of locally enhancing mass transport, while maintaining laminar flow between fuel and oxidant streams. In order to accomplish this, we have employed staggered herringbone micromixers which were generated using microfabrication tec...

In  the  current  study,  a  new  technique  was  developed  for  quantification  and  qualification  of pseudoephedrine hydrochloride (PSE) in a real sample, which was based on electrochemical sensors and  molecular  imprinted  polymer  (MIP).  The  carbon  paste  electrode  (CPE)  was  modified  and optimized by a different ratio of MIP. MIP/CPE was used as the extraction and working electrod...

Cysteine self assembled monolayer-modified gold (Cys/Au) electrode is used to immobilize superoxide dismutase (SOD) and establish a direct electron transfer between enzyme and electrode surface. However, due to the redox activity of copper ion on Cys monolayer, there would be an ambiguity in electrochemical studies of immobilized SOD on Cys/Au electrode. We designed a series of experiments to c...

Femtosecond laser surface processing (FLSP) is a machining technique used to develop functionalized surfaces consisting of micro and nano-scale features. Metal electrodes processed using this technique can be used in water electrolysis to facilitate more efficient hydrogen and oxygen gas production. This thesis explores the electrochemical behavior of femtosecond laser processed 316SS electrode...

Although the Winkler method is very precise when performed with strict control of pH and iodine concentration, it is still susceptible to errors. For example, ions such as Fe2+ and SO3-, suspended solids, and some organics can produce gross inaccuracies. There have been numerous modifications of the method over the years to compensate for its shortcomings (2). Besides the errors inherent in the...

An estimated seven to ten million people worldwide are living with Parkinson's disease. Parkinson’s disease is characterized by a decreased level of the neurotransmitter and dopamine. Levodopa (L-DOPA) is the drug most often prescribed for Parkinson’s disease. This drug is currently chemically synthesized according to a Monsanto process, but the synthesis of L-DOPA suffers from several disadvan...

Efficient extraction of Li from brine at a low cost is becoming key technology to solve energy and environmental problems. Electrochemical has become research hotspot due its consumption, high selectivity, friendliness. LiMn2O4, LiFePO4, LiNi1/3Co1/3Mn1/3O2 are widely used as cathode materials for the electrochemical but they also have some drawbacks, such small adsorption capacity. In this pap...