1. Temperature transfer function based on freshwater testate amoebae.
2. Effect of natural and anthropogenic changes on testate amoebae communities.
3. Temporal variation of aquatic bacterioplankton community.
4. Constituents and antibacterial activity of Clausena anisata.
5. Past, present and future environmental change in Africa.
6. Trends of CO2 emission at national and continental level.