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Kilian Mtotomwema 《Nordic Journal of Botany》1990,9(6):637-641
Four new species of Kyllinga from tropical Africa are described; K. robinsoniana from Zambia; K. pseudobulbosa from Tanzania; K. tisserantoides from Nigeria and K. uniflora from Tanzania. From the available records it seems that K. tisserantioides is West African in distribution while K. pseudobulbosa and K. robinsoniana have wider area of distribution within Africa. K. uniflora seems to be limited to the East African Miombo vegetation. 相似文献
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Wm. Wayt Thomas 《Brittonia》1996,48(4):481-486
Two new combinations, Rhynchospora imeriensis (Kükenthal) W. Thomas and R. planifolia (T. Koyama) W. Thomas, and a new name, R. capillifolia W. Thomas, are provided for capitate species of Rhynchospora occurring in Venezuela. A new section of capitate species with white spikelets, sect. Rigidifolia W. Thomas, is described, and its six included species are listed, discussed, and keyed. Lectotypes are designated for R. duckei R. Gross and R. longibracteata Boeckeler. Two species are illustrated. 相似文献
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A minute new species of Kyllinga, i.e. K. carinalaevis Lye & Mesterházy, from Benin in west tropical Africa is described. It is one of three or four annual species of the genus, and the characters separating it from two other annual species are given. The species is ephemeral and occurs in a vegetation type which belongs to a Nanocyperion association. The species is probably critically endangered as it was found in a single locality out of the numerous sites that have been investigated in Benin in recent years. 相似文献
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Deforestation trends in tropical Africa 总被引:1,自引:0,他引:1
R. F. W. BARNES 《African Journal of Ecology》1990,28(3):161-173
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J. W. Smith 《BMJ (Clinical research ed.)》1901,1(2103):947-949
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Marine fungi from tropical America and Africa 总被引:1,自引:0,他引:1
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Cyclamen somalense
Thulin & Warfa, spec. nova, the first member of the genus known from tropical Africa, is described from the Al Miskat Mts in NE. Somalia. The new species is closely related to the E. MediterraneanC. persicum
Mill. The disjunct Mediterranean element in the mountain flora of northern Somalia, to whichC. somalense belongs, is believed to be largely a relict of Tertiary origin. 相似文献
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T. Petr 《Hydrobiologia》1969,33(3-4):507-512
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D Adu Y Anim-Addo A K Foli E D Yeboah J K Quartey B F Ribeiro 《BMJ (Clinical research ed.)》1976,1(6014):890-892
Between 1972 and 1975, 55 adult patients with acute renal failure were admitted to the renal unit of Korle Bu Hospital. Fourteen patients died, giving an overall death rate of 25%. Massive intravascular haemolysis after a short febrile illness was the commonest cause of acute renal failure. Clinically these patients presented with blackwater fever but in only one could Plasmodium falciparum malaria be confidently diagnosed. In half the patients various bacterial and viral infections (especially typhoid) could be incriminated as causing this blackwater fever syndrome. The incidence of glucose-6-phosphate dehydrogenase deficiency was 22.5%, but we could not confirm the impression of a greater predisposition to acute renal failure in patients with this enzyme defect. 相似文献
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Mats Thulin 《Nordic Journal of Botany》1987,7(4):413-417
Five species of Ehretia in eastern Africa are shown to be better placed in the currently entirely American genus Bourreria . The new species B. lyciacea from S Somalia and E Kenya is described and illustrated. New combinations are B. petiolaris, B. nemoralis, B. orbicularis and B. teitensis . 相似文献
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Papyrus (Cyperus papyrus, Cyperaceae) covers large areas in tropical African wetlands. Analysis of its nutritive value has revealed that crude protein is higher in umbels than culms. Ruminai dry matter digestibility of papyrus is, however, higher in culms than umbels. Both the crude protein and ruminai dry matter digestibility decrease with increasing age of the plant. Values for crude protein and ruminai dry matter digestibility are similar to those reported for the range grasses that constitute the greatest percentage of forage in East Africa. In general, papyrus has some grazing potential and could be used as fodder especially in the dry season when other forage is scarce and of low nutritive value. 相似文献
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Examination of sera from 86 travellers to Britain from tropical Africa disclosed evidence of past infection with 10 identifiable viruses, of which the most important were O''nyong-nyong, dengue, chikungunya, and Ntaya. The findings indicate that infection with O''nyong-nyong may be acquired sporadically in Nigeria, Ghana, and Sierra Leone, where it has not previously been identified. Chikungunya infection had not been recorded in West Africa other than Nigeria and Senegal. Patients from Sierra Leone and contiguous Liberia had antibodies to this infection. An outbread of dengue fever in the Seychelles in early 1977 was confirmed. Ntaya virus, though known in Uganda, Cameroon, and Zaire, appears also to be transmitted in Kenya, Nigeria, and Zambia. Clinical studies indicated that chikungunya infection may present with alimentary features, possibly with jaundice. The clinical features of Ntaya infection may include kizarre neurological manifestations in addition to fever. The absence of Lassa antibodies among these travellers suggested that this infection is not a common hazard among such persons. 相似文献
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The ecology of small rodents in tropical Africa 总被引:1,自引:0,他引:1
M. J. DELANY 《Mammal Review》1972,2(1):1-42
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