Fractionation, isolation, and characterization of some Amorphophallus sp, secondary metabolites
Date of Publication
2005
Document Type
Bachelor's Thesis
Degree Name
Bachelor of Science in Biochemistry
College
College of Science
Department/Unit
Chemistry
Thesis Adviser
Anamy Ma. C. Paano
Defense Panel Chair
Wyona Patalinghug
Defense Panel Member
Emmanuel V. Garcia
Marissa G. Noel
Abstract/Summary
The crude alcoholic extracts of stems and leaves as well as tubers and roots were fractionated by sequential extraction. Extracts obtained from this step were set aside for physiological activity testing. The hexane extract of tubers and roots was chosen for further fractionation based on their TLC profile. This extract was fractionated by column chromatography with the aim of getting some pure actions.
The Amorphophallus sp. is a well-known remedial plant for a number of ailments, but reports on the secondary metabolites of Amorphophallus sp. are limited. With the limited reports, there remains a need to bridge the gap between the identified metabolites of these plants and their actual psychological activities. This study partially addressed both concerns.
Thirty-six (36) fractions were obtained from column chromatography. The major non-polar band (Fractions 16 & 17) was obtained as a semi-pure fraction (ACT 1-16). This was not purified further but was analyzed by GC-Ms. Ergosta-5, 22-dien-3-ol, acetate (RT 24.64 min), lupeol (RT 24.65 min), betulin (RT 24.70 min), 3-aceto-12-hydroxyoleanane (RT 24.76 min), and 3-aceto-20-hydroxy-12-taraxastene (RT 34.24 min) were identified from the GC-MS data of this fraction.
A second band composed of fractions 32 to 36 appeared to be with while flaky crystals. The combined fractions (ACT1-36). The white crystals obtained from the recrystallization over methanol. The spectral data analysis of this compound revealed a high molecular weight compound (m/z 1700). The NMR data showed mainly solvent peaks. The sample was dissolved in CDCl3, which did not dissolve the sample. The rest of the fractions were set aside for activity testing.
Abstract Format
html
Language
English
Format
Accession Number
TU17526
Shelf Location
Archives, The Learning Commons, 12F, Henry Sy Sr. Hall
Physical Description
viii, 76, [19] leaves : illustrations (some color) ; 28 cm.
Keywords
Amorphophallus; Amorphous substances; Metabolites
Recommended Citation
Mendoza, E. P., & Nidea, M. S. (2005). Fractionation, isolation, and characterization of some Amorphophallus sp, secondary metabolites. Retrieved from https://animorepository.dlsu.edu.ph/etd_bachelors/5887