in this study chitosan hydrogel beads with porosity ~ 0.86 and diameter ~ 20.07 mm were prepared from 85 % deacetylated chitosan for removal of cd2+ ions from aqueous solutions.  chitosan powder was dissolved into dilute acetic acid as solvent and formed into spherical beads using a phase inversion technique. the effect of temperature, initial concentration of cd2+ ions, and the period of agita...

Meningococcal disease is an acute bacterial disease caused by meningococcus (Neisseria meningitidis), a gram negative capsulated coffee bean shaped bacteria seen usually in pairs. The disease was first described in 1805, when an outbreak occurred in Geneva, Switzerland and the causative organism was identified in 1887. The disease is manifested by sudden onset of fever, severe headache, nausea ...

Macroepibenthic communities associated with the hydrocoral Errina antarctica from the Chilean fjord region: Does bathymetry influence community structure? Statutory declaration I declare that I have authored this thesis independently, that I have not used other than the declared sources, especially no internet-sources not listed in the list of literature, and that I have explicitly marked all m...