Browsing Research articles (Dept of Biological Sciences) by Issue Date
Now showing items 21-40 of 78
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Ionic and water relations of Sesuvium portulacastrum (L.)
(Academic Journals, http://www.academicjournals.org/, 2010)The aim of this study was to assess the growth response of Sesuvium portulacastrum (L.) (a halophyte) to various NaCl concentrations and hence determine how it is adapted to grow optimally under saline conditions. S. ... -
The susceptibility of different maize varieties to post-harvest infestation by Sitophilus zeamais (MOTSCH) (Coleoptera: Cuculionidae)
(Academic Journals, http://www.academicjournals.org/SRE, 2010-01)Nine maize varieties collected at IITA were investigated for their relative susceptibilities to attack by Sitophilus zeamais MOTSCH, an important insect pest of stored maize. The results obtained were summarized using ... -
Residual effects of prolonged UV-B exposure on photosynthetic gene expression
(Academic Journals, www.academicjournals.org, 2010-08-18)Residual long-term effects of increased UV-B radiation were investigated in an indigenous plant species, Dimorphotheca sinuata, by analysing photosynthetic gene expression. Reductions were observed in the amount of the ... -
Multivariate analysis of Harpagophytum DC. ex Meisn (Pedaliaceae) based on fruit characters
(Academic Journals; http://www.academicjournals.org/ijbc, 2011)Harpagophytum is bitypic and native to Southern Africa. Its two species are Harpagophytum procumbens and H. zeyheri. H. procumbens is medicinal. A reliable method of identifying the species is through its fruit. However, ... -
The influence of range fire on soil fungi, microbial activity and soil properties along the Boro route of the Okavango Delta
(Global Science Books, http://www.globalsciencebooks.info/, 2011)The influence of burning on soil microbial dehydrogenase activity, nitrogen content and fungal population along the Boro route in the Okavango Delta was assessed in the flood and dry seasons. Soil samples from the burnt ... -
Floristic diversity and uses of medicinal plants sold by street vendors in Gaborone, Botswana
(Global Science Books, http://www.globalsciencebooks.info/, 2011)The sale of herbal medicine, either as concoctions or single plant specimens, has become common in the streets and main shopping centres of major towns and cities in Botswana. A study was undertaken to collect information ... -
Hepatoprotective potentials of water extract of Bauhinia purpurea bark against alcohol induced toxicity
(Academic Journals, http://www.academicjournals.org/SRE, 2011)Bark of Bauhinia purpurea tree was collected and both the water and methanol extracts were prepared. Both extracts were tested for free radical scavenging activities and phenol content. Water extract was then tested for ... -
Isolation of cultivable halophilic Bacillus sp. from the Makgadikgadi Salt Pans in Botswana
(Global Science Books, http://www.globalsciencebooks.info/, 2011)Halophilic bacteria from the Makgadikgadi salt pans in north central Botswana were isolated using culture-dependent methods. Polymerase chain reaction (PCR) amplification of the 16S rRNA gene and phylogenetic analysis were ... -
Fungi and their use in the possible control of Nematodes in Botswana soils
(Global Science Books, http://www.globalsciencebooks.info/, 2011)A study assessing fungi isolated from three climatic regions of Botswana as a possible control for root knot nematodes (Meloidogyne spp.) affecting the tomato(Lycopersicon esculentum L. var. ‘Money maker’) crops was ... -
An assessment of Prosopis L. in the Bokspits Area, South-Western Botswana, based on Morphology
(Global Science Books, http://www.globalsciencebooks.info/, 2011)The genus Prosopis comprises 44 species. Extensive introgression and hybridization is suspected in the genus, which makes identification of the species very difficult. Accurate identification of the species is crucial in ... -
Effect of water stress on photosynthetic characteristics of two sorghum cultivars
(Global Science Books, http://www.globalsciencebooks.info/, 2011)The effects of water stress on the photosynthetic characteristics of two locally-cultivated sorghum cultivars (‘Segaolane’ and ‘Town’) were investigated over a period of weeks. Water stress was imposed on 1-week-old plants ... -
Development of Callosobruchus maculatus (F.) on some pulses in Botswana
(Applied Zoologists Research Association (AZRA), http://www.azra-india.com/journal.html, 2011)Some aspects of the biology of Callosobruchus maculatus (F.) were studied on seven pulses viz., Cowpea (5 varieties), Bambara groundnut, Mung bean, Pigeonpea, Lablab, Soya bean and Kidney bean, under ambient laboratory ... -
Biomass production and economic value of Phragmites australis Reedbeds in the Southern Okavango Delta, Botswana
(Global Science Books, http://www.globalsciencebooks.info/, 2011)Most work globally on Phragmites spp. has been done in temperate northern hemisphere localities, where winter low temperatures and short day lengths cause a seasonal decrease in growth. In this study, we report above-ground ... -
The genetic prehistory of southern Africa
(Macmillan Publishers Limited, http://www.nature.com/ncomms/index.html, 2012)Southern and eastern African populations that speak non-Bantu languages with click consonants are known to harbour some of the most ancient genetic lineages in humans, but their relationships are poorly understood. Here, ... -
Viral diversity and diversification of major non-structural genes vif, vpr, vpu, tat exon 1 and rev exon 1 during primary HIV-1 subtype C infection
(Public Library of Science, http://www.plosone.org/, 2012)To assess the level of intra-patient diversity and evolution of HIV-1C non-structural genes in primary infection, viral quasispecies obtained by single genome amplification (SGA) at multiple sampling timepoints up to 500 ... -
tat Exon 1 exhibits functional diversity during HIV-1 subtype C primary infection
(American Society for Microbiology, http://jvi.asm.org/, 2013)Human immunodeficiency virus type 1 (HIV-1) Tat is a mediator of viral transcription and is involved in the control of virus replication. However, associations between HIV-1 Tat diversity and functional effects during ... -
Effect of different grain spawns and substrate sterilization methods on yield of oyster mushroom in Botswana
(Int.J.Bioassays, http://www.ijbio.com, 2013)The effect of three different grain spawns and two substrate sterilization methods on the spawn quality and yield of a hybrid of Pleurotus ostreatus x P. florida (Po x Pf) was studied on maize cobs supplemented with 20% ... -
Biogenic amine producing bacteria associated with three different commercially fermented beverages in Botswana
(Academic Journals, http://www.academicjournals.org/AJMR, 2013)The microbial quality and predominant bacterial groups of three fermented beverages was investigated. The bacteria associated with sorghum beer, sour milk (madila/amasi) and sour maize beverage (mageu/mahewu) were ... -
Microbial quality assessment and predominant microorganism of biltong produced in butcheries in Gaborone, Botswana
(Scientific Research Publishing Inc. http://www.scirp.org/journal/fns/, 2014)Biltong is a dried ready to eat meat product that is produced and consumed to a large extent in Botswana. A study was undertaken with the objective of determining the microbial quality and isolating and identifying the ... -
Assessment of diversity in Harpagophytum with RAPD and ISSR markers provides evidence of introgression
(Mendelian Society of Lund, http://www.hereditasjournal.com/, 2014)The genus Harpagophytum has two species: H. procumbens which is an important medicinal plant in southern Africa, and H. zeyheri. Genetic diversity in 96 samples, obtained by germinating seeds collected from Botswana, was ...