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Antimicrobial Activity of Extracts from Six Green Algae from Tanzania OceanDocs
Mtolera, M.S.P.; Semesi, A..
Many algae species have been shown to have bactericidal or bacteriostatic substances (Glombitza, I979;Michaneck, 1979; Caccamese et al., 1980; Fenical & Paul, 1984; Niang& Hung, 1984). The antibacterialagents found in the algae include amino acids, terpenoids, phlorotannins, acrylic acid, phenoliccompounds, steroids, halogenated ketones and alkanes, cyclic polysulphides and fatty acids. In a large numberof marine algae antimicrobial activities are attributed to the presence of acrylic acid.
Tipo: Book Section Palavras-chave: Algae resources; Bacteriology.
Ano: 1996 URL: http://hdl.handle.net/1834/469
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Coralline Algae, Important Coral-reef Builders Threatened by Pollution OceanDocs
Mohammed, S.M.; Björk, M.; Björklund, M.; Semesi, A..
The release of inorganic nutrients into the sea by domestic sewage is a major threat to many marine systems. This eutrophication affects coral-reef organisms indirectly by increased growth of microalgae, leading to increased sedimentation, decreased light availibility, rapid growth of opportunistic macroalgae, etc. In this paper, we report a decrease in the cover of important group of coral-reef builders, the coralline algae. This decrease might be caused by the outlets of sewage water from Zanzibar town. Laboratory and field experiments show that both the growth rate and the calcification of these organisms are negatively affected by high phosphate levels, but not by nitrate or ammonia.
Tipo: Journal Contribution Palavras-chave: Sewage; Algae; Eutrophication; Coral reefs; Nutrients; Environmental degradation; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_34821.
Ano: 1995 URL: http://hdl.handle.net/1834/302
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Farming and Physiology of the Red Algae Eucheuma: Growing Commercial Importance in East Africa OceanDocs
Pedersén, M. C.; Mtolera, M.S.P.; Collén, J.; Abrahamsson, K.; Semesi, A..
Tipo: Journal Contribution Palavras-chave: Algae culture.
Ano: 1995 URL: http://hdl.handle.net/1834/947
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