title: Fatty Acid compositions of two siphonaceous green algae from the coast of karachi.
abstract: Two green seaweeds Bryopsis pennata Lamour. and Valoniopsis pachynema (Mart.) Bthetarg. collected from the coast of Karachi have been studied for their fatty acid compositions. Altogether 34 fatty acids were identified as methyl esters from them, out of which 9 were saturated and 25 unsaturated acids including 17 monoenoic, 5 dienoic and 4 trienoic acids. They were identified by gas chromatography-mass spectroscopy (GC-MS). Both seaweeds contained exactly the same saturated fatty acids, their unsaturated acids (67.58-71.81%) were greater in proportion than the saturated ones (28.17-32.38%). Tridecatrienoic (28.1%) and palmitic (13.93%) acids occurred in highest amount. Oleic acid was not uniformly present and occurred in small proportion (1.53%).
authors.affiliation: Department of Botany, University of Karachi, Karachi-75270, Pakistan.
authors.forename: R
authors.initials: R
authors.lastname: Aliya
authors.forename: M
authors.initials: M
authors.lastname: Shameel
authors.forename: K
authors.initials: K
authors.lastname: Usmanghani
authors.forename: S
authors.initials: S
authors.lastname: Sabiha
authors.forename: V U
authors.initials: VU
authors.lastname: Ahmed
mesh_terms: D000460:Chlorophyta; D004952:Esters; D005227:Fatty Acids; D008401:Gas Chromatography-Mass Spectrometry; D019301:Oleic Acid
chemical_list: D004952:Esters; D005227:Fatty Acids; D019301:Oleic Acid