Synthesis and characterization of a material derived from 4-mercaptobenzoic acid: A novel platform for oligonucleotide immobilization.

Electrochemically mediated reduction of epichlorohydrin pollutant by Ni(I)(hexamethylcyclam) in aqueous media

Environmental monitoring is a process of assessing the quality of atmosphere and its effects on climate changes flora and fauna. The numbers of harmful pollutants have increased over the period of time. Thus environmental monitoring has become crucial and requires devices with high precision, sensitivity, and specificity for proper monitoring. Biosensors provide rapid and sensitive analytical tools for the detection of a range of pollutants and currently being used for environmental monitoring. This chapter particularly focuses on applications of antibody-based biosensors for environmental monitoring and discusses the progress made over the years. Applications, strength, and limitations of antibody-based sensor technology are discussed with the examples of recent development. Further, chapter summarizes the scope for antibody-based sensor technology in environmental monitoring of pathogens and emerging contaminants; economic feasibility, time, and reliability. In addition, chapter discusses the benefits of antibody-based sensor technology in environmental monitoring (pathogens and emerging contaminants) over other methods.

Advances in antibody-based biosensors in environmental monitoring

Improved Sensing Performance of Amperometric Urea Biosensor by Using Platinum Nanoparticles

The ferrocenium/ferrocene redox couple (Fc+/Fc) and its decamethylated counterpart, decamethylferrocenium/decamethylferrocene (DmFc+/DmFc), are important internal standards for potential referencin...

Solvent Effect on Ferrocenium/Ferrocene Redox Couple as an Internal Standard in Acetonitrile and a Room-temperature Ionic Liquid

Electrocatalytic degradation of sulfur mustard (SM) was studied using a gold electrode modified with nickelphthalocyanine and polypyrrole (NiPc/pPy/Au) in the presence of a cationic surfactant cetyltrimethyl ammonium bromide Several techniques such as cyclic voltammetry, scanning electron microscopy, electrochemical impedance spectroscopy, energy dispersive X-ray spectroscopy and Raman spectroscopy have been employed for the characterization of modified electrodes NiPc/pPy/Au modified electrode exhibited excellent electrochemical sensing and degradation ability towards SM The present modification indicated two electron involvements in the electrocatalytic degradation of SM in addition to being an irreversible adsorption controlled process Degraded products were identified by gas chromatography-mass spectrometry Moreover, electrochemical parameters of oxidation of SM such as heterogeneous rate constant (0436 s−1), transfer coefficient (047) and the number of electrons involved (2) were deduced from cyclic voltammetry results The NiPc/pPy/Au modified electrode showed excellent electrocatalytic degradation towards SM when compared to bare gold, pPy/Au and NiPc/Au modified electrode at ambient conditions

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A simple degradation method for sulfur mustard at ambient conditions using nickelphthalocyanine incorporated polypyrrole modified electrode

Environmental surveillance of the Gram-negative bacterium Burkholderia pseudomallei is important in order to define human populations at risk of acquiring the infection; hence, in this study, we developed a method for the detection of B. pseudomallei based on surface plasmon resonance (SPR) using 4-mercaptobenzoic acid (4-MBA) modified gold SPR chip by monitoring the interaction of rpGroEL antigen (rpGroEL Ag) with immobilized rabbit antibody (anti-rpGroEL rAb). Affinity constant (K
 D
 ) and maximum binding capacity of analyte (B
 max) values for the interaction of rpGroEL Ag with the immobilized anti-rpGroEL rAb were calculated by using kinetic evaluation software and found to be 14.7 7 pM and 105.40 mo, respectively. In addition, thermodynamic parameters such as ∆G (Gibb’s free energy change), ∆H (change in the enthalpy), and ∆S (change in the entropy) were determined for the interaction between rpGroEL Ag and immobilized anti-rpGroEL rAb, and the values revealed that the interaction is spontaneous, exothermic, and driven by entropy.

Surface Plasmon Resonance Immunosensor for the Detection of Burkholderia pseudomallei

Electrochemical characterization of ferrocene (Fc) was investigated to find out diffusion coefficient (D), heterogeneous rate constant (ko), and relationship between D and ko  with Pt and Au electrode in three common room temperature ionic liquids (RTILs) containing namely 1-butyl-1-methyhlpyrrolidinium bis (trifluoromethylsulfonyl) imide, 1-ethyl-3-methylimidazolium trifluoromethylsulfonate and triethylsulfonium bis (trifluoromethylsulfonyl) imide by utilizing cyclic voltammetry and impedance spectroscopy. The D, double layer capacitance (C dl ) and apparent activation energy (ΔG exp ) of Fc was deduced in order to elucidate the role of RTIL on the electrode kinetics. The ko of Fc was estimated by electrochemical impedance spectroscopy by using the Randles equivalent circuit as the model. A graph between ln (ko) versus ln (η) suggests that Fc redox process in RTIL with Pt and Au electrodes are adiabatic. The calculated diffusion coefficients and rate constant were of the order of 10 −7 cm 2 s −1 and 10 −2 cm s −1 , respectively.

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Pushpendra Kumar Sharma

Papers

A simple degradation method for sulfur mustard at ambient conditions using nickelphthalocyanine incorporated polypyrrole modified electrode

Surface Plasmon Resonance Immunosensor for the Detection of Burkholderia pseudomallei

Electrochemistry of Ferrocene in different Room Temperature Ionic Liquids with Platinum and Gold Electrodes