《Essential oils constituents, phytochemical analyses, and antimicrobial studies on leaf and stem of Thunbergia laevis Nees》 was written by Olaoluwa, Olaoluwa Omosalewa; Moronkola, Dorcas Olufunke; Kwenga, Sichilongo; Mgbeoji, Okwu. COA of Formula: C2H4I2This research focused onThunbergia leaf stem essential oil phytochem antimicrobial. The article conveys some information:
Essential oils of leaf and stem of Thunbergia laevis were obtained by Clevenger-type apparatus, their chem. constituents were analyzed using gas chromatog. [GC] and gas chromatog.-mass spectrometry [GC-MS]. Hexane and ethanol extracts from leaf and stem of Thunbergia laevis were obtained by cold extraction and screened for phytochem. constituents. Antimicrobial activities of these oils, hexane and ethanol extracts were carried out against six bacteria and four fungi. Forty-six compounds identified in leaf oil account for 62.58% of it, dominated by phytol (4.10%) and i-Pr hexadecanoate (3.19%); ten compounds in stem oil represent 62.40% of it, with most abundant methoxyl-phenyl-oxime (23.45%) and Z-11- hexadecenoic acid (12.28%). Leaf oil mostly contains hydrocarbons and esters, while stem oil have aromatic derivatives and acids. Antimicrobial studies of leaf oil caused strong inhibition in growth of Staphylococcus aureus and Candida albicans at concentration between 25 – 100% with the zone of inhibition ranging between 20 -28 mm and 14 – 18 mm resp. Stem oil was most active on Candida albicans and Asprgillus niger at the same concentration with zone of inhibition of 14 – 18 mm and 12 – 18 mm resp. Alkaloids, tannins, saponins, resins, phenols and terpenoids were observed in leaf and stem ethanol extracts Leaf ethanol extract was most active on Staphylococcus aureus, Candida albicans and Rhizopus stolonifer. Stem ethanol extract moderately inhibited growth of these microorganisms. This study is on Thunbergia laevis leaf and stem essential oils constituents, phytochem. and antimicrobial analyses, which have not been earlier reported in literature. In addition to this study using 1,2-Diiodoethane, there are many other studies that have used 1,2-Diiodoethane(cas: 624-73-7COA of Formula: C2H4I2) was used in this study.
1,2-Diiodoethane(cas: 624-73-7) is one of organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles.COA of Formula: C2H4I2
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com