Research on botanical characteristics and chemical composition of Lobophora tsengii D.tien et Z. Sun collected in Hai Phong (Vietnam)

Abstract

Lobophora tsengii D.Tien & Z.Sun, whose Vietnamese name is Thuy Tseng seaweed, belongs to the brown algae phylum, Dictyotales order, Dictyotaceae family, is a new species discovered and published for the first time in 2020. In this study, Lobophora tsengii seaweed samples collected in Bach Long Vy sea area (Hai Phong) were analyzed to clarify the external morphological characteristics, surface cell structure, internal structure through cross-section and longitudinal section, as well as characteristics of seaweed powder. By specific chemical reactions, the presence of organic compounds in the seaweed sample can be identified, including: fat and saponin. In addition, the solvent system n-hexane: ethyl acetate (5:1) gives good separation results on thin layer chromatography (TLC), showing that this is a suitable solvent system for qualitative determination of extracts from this seaweed species.