IR@NEIST - North East Institute of Science and Technology (CSIR)
Not a member yet
339 research outputs found
Sort by
Microwave-promoted one-pot synthesis of 4H-thiopyrans from a,b-unsaturated ketones via a three-component reaction
Get PDF—An efficient one-pot synthesis of substituted 4H-thiopyrans has been accomplished from a three-component reaction of
a,b-unsaturated ketones, Lawesson’s reagent and alkynes under microwave irradiation
Esterification of lauric acid with lauryl alcohol using cross-linked enzyme crystals: Solvent effect and kinetic study
Get PDFIn this paper, we report a comprehensive kinetic study on esterification of lauric acid with lauryl alcohol catalyzed by
commercial porcine pancreatic lipase (PPL) in the form of cross-linked enzyme crystals (CLEC) using glutaraldehyde as
thecrosslinker.ThestabilityoftheCLECwasbetter thantheimmobilized enzymefor practicalapplications.Comparative
studies using six different solvents having hydrophobicity (log p) values ranging from 0.70 to 3.50 revealed that the
esterification reaction was favoured in hydrophobic solvents. The kinetics of the esterification reaction conformed with
the so-called Ping-PongBi-Bi mechanism with alcohol inhibition
Ultrasonic velocities, densities, viscosities, electrical conductivities, Raman spectra, and molecular dynamics simulations of aqueous solutions of Mg(OAc)2 and Mg(NO3)2: Hofmeister effects and ion pair formation
Get PDFEXTENT OF LEAD IN HIGH-SULFUR ASSAM COALS
Get PDFThis study has been undertaken to understand the precise nature of association of lead in high
sulphur Assam coal. Sequential extraction of lead with ammonium acetate, HCl and RuCl 3 solutions
havebeen carriedout. RuCl3 hasbeenusedasasuitable reagent fortheextractionoflead.Itisfound
thattreatment ofsamplewithCCl 4increasestheextractionofleadbyRuCl 3solution. Theamountof
leadinthecoalstudiedvariesbetween43.2and50.4ppm.Ithasbeenfoundthatleadispredominantly
occurring in coals in association with organic matter and needs concerted attention to understand its
bio-availability. The chemical principles involved therein are also discussed.
D 2004 Elsevier B.V. All rights reserved
Deposition fluxes of chemical components of fog water at a rural site in North East India
Get PDFThe north-eastern part of India has not been investigated for atmospheric deposition studies so far. In this study, deposition fluxes on an
artificial surface of chemical components due to fog have been calculated during winter from December 2002 to January 2003 at Jorhat,
a rural site in north-east India. As the land in this area is covered with vegetation, the site is representative of rural characteristics in this
region. The average pH of fog water is 5.6. Among chemical components, NH+
4 was observed to be dominating ion. Soil pH in this
region is acidic (4.9). Unlike other parts of the country, chemical analysis of soil in this region revealed that influence of suspended soil
dust on fog deposition was insignificant. A comparison of fluxes of fog with rain water during December–January months showed that
deposition fluxes due to rain water were higher by almost one order of magnitude on an artificial surface but on natural surfaces, the
fluxes may be comparabl
Antibacterial proteins from non-mulberry silkworms against flacheria causing Pseudomonas aeruginosa AC-3
Get PDFSTEREOSELECTIVE INTRAMOLECULAR HETERO-DIELS-ALDER REACTIONS OF 1-OXA-1,3-BUTADIENES - SYNTHESIS OF NOVEL ANNELATED PYRROLO[1,2-A]INDOLES
Get PDF14Novelclassesofpyrano-1,3-dioxane-,pyranopyrimidine-andpyranopyrazole-fusedpyrrolo[1,2-a]indolesaresynthesised
via stereoselective intramolecular 1-oxa-1,3-butadiene hetero Diels 13Alder reaction
