Date of Publication

4-1984

Document Type

Master's Thesis

Degree Name

Master of Science in Teaching Major in Chemistry

Subject Categories

Chemistry

College

Br. Andrew Gonzalez FSC College of Education

Department/Unit

Science Education

Thesis Adviser

Luzvisminda Rivero

Defense Panel Chair

Wyona C. Patalinghug

Defense Panel Member

Ma. Cecile Flores
Consolacion Y. Ragasa

Abstract/Summary

The insecticidal properties of the crude extracts of the leaves of Gliricidia sepium were tested on the cotton stainer, Dysdercus cingulatus. The solvents used in the successive extractions were petroleum ether, acetone, methanol and water. The petroleum ether crude extract showed the highest activity measured as percentage mortality. Subsequent thin layer chromatographic analyses of this extract showed a decreasing number of components as the polarity of the solvent used for extraction was increased. The TLC run of the petroleum ether extract required a 1:2 acetone-petroleum ether (v/v) developing solvent system for the efficient separation of components. The active components of the petroleum ether extract were separated and isolated by quick column chromatography. The fraction with a single component as shown by TLC runs, was further characterized through nuclear magnetic resonance spectroscopy.

Abstract Format

html

Language

English

Format

Electronic

Accession Number

TG01263

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

40 leaves; 28 cm.

Keywords

Insecticidal plants; Gliricidia sepium--Analysis

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