Mineral composition and heavy metal risk assesment of selected geophagic soils from Tanzania.

Geophagy or Pica is the unintentional traditional behavior of eating soil by indigenous people in different countries. practiced in many countries due to nausea among pregnant women and mineral deficiencies without knowing the associated health risks. In this study the mineral composition of geophagic soil and its associated health risk among consumers was determined.

Isolation and antimicrobial activities of a novel discolornolide and other compounds from .

Characterisation of a novel discolornolide () isolated from a first time investigation of is described. Other 6 known compounds, karatavin (), -acetylanonaine (), quercetin-3--arabinose (), stigmasterol (, a mixture of stigmasterol and β-sitosterol () and octahydro-5-isopropyl-3-methyl-2-methyleneazulene-8,8-diol () isolated are also reported. The structures were established by spectroscopic methods.

Flavonoids from Erythrina schliebenii.

Prenylated and O-methylflavonoids including one new pterocarpan (1), three new isoflavones (2-4), and nineteen known natural products (5-23) were isolated and identified from the root, stem bark, and leaf extracts of Erythrina schliebenii. The crude extracts and their constituents were evaluated for antitubercular activity against Mycobacterium tuberculosis (H37Rv strain), showing MICs of 32-64 μg mL and 36.9-101.

Antifungal Enantiomeric Styrylpyrones from Sanrafaelia ruffonammari and Ophrypetalum odoratum.

Phytochemical investigation of Sanrafaelia ruffonammari Verd and Ophrypetalum odoratum Diels that belongs to the rare genera confined to East African coastal forests led to the isolation of enantiomeric styrylpyrone dimer, (±)-5-methoxy-7-phenyl-[4-methoxy-2-pyronyl]-1-(E)-styryl-2-oxabicyclo-[4.2.0]-octa-4-en-3-one (1) alongside (+)-6-styryl-7,8-epoxy-4-methoxypyran-2-one (2) and the enantiomeric (+)- (3) and (-)-6-styryl-7,8-dihydroxy-4-methoxypyran-2-ones (4).