Stelleropsis genus belongs to Thymelaeaceae and has two species in Iran of which S. iranica Pobed. subsp. Iranica Bonge (aerial parts) were collected from the North-East of Iran and extracted with AcOEt and MeOH, consequently. The main phenolic compounds were isolated by different chromatography methods and the structures identified by spectroscopic methods (1H-NMR, 13C-NMR, HMBC, HMQC, H-H COS...

Seventeen compounds, including six rotenoids (1-6), seven isoflavones (7-13), one stilbene (14) and three benzoic acid derivatives (15-17) were isolated from the seeds of Amorpha fruticosa. Their structures were elucidated by spectroscopic methods and by comparison of their reported spectral data. Among them, compound 4 was firstly purified as a natural product, compounds 5, 8 12 and 15 17 were...

The study of the chemical constituents of the whole plant of Erigeron bonariensis (L.) has resulted in the isolation and characterization of a new and nine known compounds. The known compounds were identified as stigmasterol (1), freideline (2), 1,3-dihydroxy-3R,5R-dicaffeoyloxy cyclohexane carboxylic acid methyl ester (3), 1R,3R-dihydroxy4S,5R-dicaffeoyloxycyclohexane carboxylic acid methyl es...

A review is presented about the studies that have been carried out on the phenolic composition of the species of the genus Agave in order to show which species of the genus has been analyzed, what is the potential of the species of Agave as source of phenolics with important biological activities, and what is the significance of the phenolic profiles as chemotaxonomic markers in the genus. The ...

A method for characterizing pigmented bacteria based on the numerical analysis of their carotenoid absorption spectra was examined. To achieve this, some non-phototrophic pigmented bacteria that were isolated from various environments and closely related types of species were used. Bacterial carotenoid pigments were extracted with an acetone:methanol (7:2) mixture and the absorption spectra wer...

Vietnam's sea is assessed to be very diverse and rich in seaweed species. It about 1000 different species of seaweed, which more than 800 have been identified, classify into genus, families, classes, phylums, continuously updated from the 1950s present. Previous studies by Vietnamese international scientists shown that lipids contain many valuable active ingredients such as acids C20: 4n-6 (AA)...

The rapid response of phytoplankton communities to environmental changes makes this compartment one the most important biological variable consider in dealing with ecology and trophodynamic coastal areas, especially relation ongoing climate increased human pressures. In last 30 years, use chemotaxonomy has improved capability detect community composition terms chemofunctional groups, for small ...

Pigment-based chemotaxonomy is a widely utilized tool to determine the biomass of phytoplankton classes from pigment biomarkers. The CHEMTAX approach sensitive initial estimates pigment-to-chlorophyll (Chl a) ratios for required, even though these are modified by process. We present an alternative chemotaxonomic method that utilizes simulated annealing with steepest descent algorithm derive cla...