IR@NEIST - North East Institute of Science and Technology (CSIR)
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Unexpected deviation from diene behaviour of uracil amidine: Towards synthesis of some pyrido[2,3-d]pyrimidine derivatives
Get PDFCondensation products obtained from the treatment
of uracil amidine with preformed or in situ generated
suitably substituted olefins unexpectedly undergo intramolecular
cyclisation during silica gel chromatography to generate
pyrido[2,3-d]pyrimidines. Various reaction conditions
arestudiedandthealterednatureoftheuracilamidinemoleculeisfurtherexploredbyreactingitwithdifferentsuitably
substituted alkene
An Alternative Eco-Friendly Avenue for Castor Oil Biodiesel: Use of Solid Supported Acidic Salt Catalyst, Biodiesel - Feedstocks and Processing Technologies
Get PDFGreen chemistry approaches to the regioselective synthesis of spiro heterobicyclic rings using iodine as a new and efficient catalyst under solvent-free conditions
Get PDFIodine catalyzes the pseudo four-component
reaction of an aldehyde, a urea or thiourea, and cyclic 1,3-
dicarbonyl compounds under microwave irradiation in a
solvent-free condition to yield various <3 symmetric spiro
heterobicyclic rings in excellent yields
Genetic and functional diversity among the antagonistic potential fluorescent Pseudomonada isolated from tea rhizosphere
Get PDFTwenty-five fluorescent pseudomonads from
rhizospheric soil of six tea gardens in four district of Upper
Assam, India were isolated and screened for antagonistic
activity against fungal pathogens such as Fusarium oxysporum
f. sp. raphani (For), Fusarium oxysporum f. sp. ciceri
(Foc), Fusarium semitectum (Fs), and Rhizoctonia solani
(Rs); and bacterial pathogens 14Staphylococcus aureus
(Sa), Escherichia coli (Ec), and Klebsiella pneumoniae
(Kp). Most of the isolates exhibited strong antagonistic
activity against the fungal pathogens and gram-positive
bacterium i.e. Staphylococcus aureus. Productions of siderophore,
salicylic acid (SA), hydrogen cyanide (HCN),
and cell wall-degrading enzyme (chitinase) were studied to
observe the possible mechanisms of antagonistic activity of
the isolates. Correlation between the antagonistic potentiality
of some isolates and their levels of production of
siderophore, salicylic acid, and hydrogen cyanide was
observed. Out of the 25 isolates, antibiotic-coding genes,
2,4-diacetylphloroglucinol (DAPG) and pyoluteorin (PLT)
were detected in the isolates, Pf12 and Pf373, respectively.
Genetic diversity of these fluorescent pseudomonads were
analyzed with reference to four strains of Pseudomonas
fluorescens NICM 2099T, P. aeruginosa MTCC 2582T,
P. aureofaciens NICM 2026T, and P. syringae MTCC 673T.
16S rDNA-RFLP analysis of these isolates using three tetra
cutter restriction enzymes (HaeIII, AluI and MspI) revealed
two distinct clusters. Cluster A comprised only two isolates
Pf141 and 24-PfM3, and cluster B comprised 23 isolates
along with four reference strains
Auo-Nanoparticles: Control size and morphology stabilized by tripodal phosphine based ligands and their antimicrobial activity
Get PDFActivated clay supported heteropoly acid catalysts for esterication of acetic acid with butanol
Get PDFStudies on the influence of host plants and effect of chemical stimulants on the feeding behavior in the muga silkworm, Antheraea assamensis
Get PDFThe feeding habits of Antheraea assamensis, Helfer (Lepidoptera: Saturniidae) larvae towards the
leaves of its four different host plants, Persea bombycina King ex. Hook (Laurales: Lauraceae),
Litsea polhantha Jussieu, L. salicifolia Roxburgh ex. Nees and L. citrata Blume, and the
chemical basis of feeding preference were investigated. Nutritional superiority of young and
medium leaves with respect to soluble protein, total phenol and phenylalanine ammonia lyase
activity was observed in the leaves of P. bombycina compared to other host plants. Attraction and
feeding tests with detached leaves and artificial diet with different chemical stimulants revealed
that a mixture of the flavonoids, myrcetin, and 7, 2’, 4’ trimethoxy dihydroxy flavone with sterol
compound β-sitosterol elicited the most biting behavior by A. assamensis larvae. While linalyl
acetate alone attracted larvae towards the leaves of the host plants, a mixture of caryophyllene,
decyl aldehyde and dodecyl aldehyde was found to both attract them to the host leaves and cause
biting behavior. Azaindole was found to deter them from the host plants
