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1

Insect antifeedant potent quinoxalines

Lakshmanan K., Sekar K. G., Sathiyendiran V., Muthuvel I.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 41

82--87

EN

Some 6-substituted aryl quinoxalines have been prepared and their purities were checked by their physical constants and spectroscopic data reported earlier. The insect antifeedant activities of these quinolones were studied by leaf-discs bio assay method using 4th instar larvae Achoea Janata L.

2

(E)-N-substitutedbenzylidene-4-methoxyanilines as Insect Antifeedants

Lakshmanan K., Sekar K. G., Sathiyendiran V., Suresh R.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 41

118--123

EN

Some substituted aryl Schiff’s bases[(E)-N-substitutedbenzylidene-4-methoxyanilines] have been prepared and their purities were checked by their physical constants and spectroscopic data reported earlier. The insect antifeedant activities of these Schiff’s bases have been studied by leafdiscs bio assay method using 4th instar larvae Achoea Janata L.

3

Insect antifeedant potent unsaturated 1,3-oxazine-2-amines

Thirunarayanan G., Renuka V., Sekar K.G., Lakshmanan K., Anbarasu K.

International Letters of Chemistry, Physics and Astronomy

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2014

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Vol. 4

66--81

EN

Insect antifeedant activities of some halo substituted aryl 1,3-oxazine-2-amines have been measured using 4th instar larvae Achoea Janata L by castor leaf discs-Dethler’s method. The highly halo substituted oxazine amines have shown good insect antifeedant activities. The 1,3-oxazine amines have been synthesised by greener method by solvent-free cyclization of aryl enones with urea under microwave irradiation. The yields of the oxazines were more than 80 %. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data.

4

On the Power of P Systems with Contextual Rules

Krishna S.N., Lakshmanan K., Rama R.

Fundamenta Informaticae

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2002

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Vol. 49, nr 1-3

167-178

EN

We consider P Systems with string objects which evolve by means of one-sided contextual rules and erasing contextual rules. The generative power of these systems with three or less than three membranes is investigated. We show that systems with three membranes characterize the family of recursively enumerable languages. When the string replication is used in one-sided contextual rules, these systems are able of solving NP-complete problems in linear time: this is exemplified with SAT and HPP.