Vijay S. Tripathi

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A novel amperometric biosensor for hydrogen peroxide (H(2)O(2)) was developed by entrapping horseradish peroxidase (HRP) in a new ormosil composite doped with ferrocene monocarboxylic acid-bovine serum albumin conjugate and multiwall carbon nanotubes (MWNTs). The ormosil was prepared using 3-(aminopropyl)triethoxysilane and 2-(3,4(More)
We present the design and implementation of a phase luminometry sensor system with improved and tunable detection sensitivity achieved using a complementary metal-oxide semiconductor (CMOS) integrated circuit. We use sol-gel derived xerogel thin films as an immobilization media to house oxygen (O2) responsive luminescent molecules. The sensor operates on(More)
Active carbon spheres (ACSs) with different porous structures prepared in the laboratory were characterized by static adsorption studies and inverse gas chromatographic (IGC) technique. Surface properties such as BET surface area, micropore volume and pore size in different regions of porosity were determined using different theoretical approaches.(More)
A simple, rapid and accurate method for the determination of chloride in magnesium metal has been developed. The quantitative determination of chloride was accomplished by anion exchange chromatography with conductometric determination. A Metrosep Anion Dual 2 analytical column connected in series with a Metrosep RP guard column was used for chloride(More)
Highly non-toxic and conductive ormosil composite film was prepared using (3-aminopropyl)triethoxysilane and 2-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane by doping with ferrocenemonocarboxylic acid-bovine serum albumin (FMC-BSA) conjugate and multiwall carbon nanotubes (MWNTs). With glucose oxidase (GOD) as a model enzyme this film could be used to design(More)
A novel electrocatalytic ethanol biosensor using ferrocene-encapsulated palladium (Pd)-linked organically modified sol-gel glass (ormosil) is reported. The alkoxy precursors used to prepare the new ormosil-based electrocatalytic biosensor are Pd-linked glycidoxypropyltrimethoxysilane and trimethoxysilane. Pd-glycidoxypropyltrimethoxysilane (black solution)(More)
Mixtures containing diammonium hydrogen phosphate, ammonium molybdate, and minerals in presence of p-nitroaniline resulted in formation of glycine, methionine, phenylalanine, tryptophan, and tyrosine. Proline and valine were observed in a few tubes. When p-phenylene diamine was present in the mixture, glycine was absent, while isoleucine and leucine were(More)
If an aqueous mixture of ammonium molybdate, diammonium hydrogen phosphate, biological minerals, and formaldehyde is exposed to sunlight, typical "Jeewanu", mixtures are observed. However, if a little solution of p-phenylene diamine, p-nitroaniline, alpha-naphthylamine or beta-naphthyl amine is added to it, a dense white precipitate is obtained. This(More)
Detergents contain a hydrophobic hydrocarbon structure and a hydrophilic group which may be anionic, cationic, or neutral. Detergents form stable emulsions and are capable of trapping lipid-soluble materials in the interior of the hydrophobic portion of the miscelles. Application of the knowledge of detergents to the discipline of microbiology would provide(More)
Malonic and oleic acids were found in the typical mixtures. Samples containing alpha-naphthylamine gave oleic and malic acids which disintegrated with time of exposure. Tricarballylic acid was confirmed in presence of beta-naphthyl amine, but disappeared with time. Arachidic, tartaric, and adipic acids were found, but they disappeared in eight days' exposed(More)