University of Botswana Research, Innovation and Scholarship Archive: Recent submissions
Now showing items 2021-2040 of 2188
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Solar home systems in Botswana—Opportunities and constraints
(Elsevier Science Ltd. http://www.elsevier.com/locate/rser, 2009)Lack of access to electricity grid form the main challenge facing majority of developing regions particularly in rural communities. The situation is driven mostly by the absence of electricity infrastructure in most of ... -
Stereoselective synthesis of 3,4,5,6-tetrahydroxycyclohexyl b-amino acid derivatives
(Elsevier Ltd. www.elsevier.com/ locate/tetlet, 2008)Stereoselective syntheses of racemic (1S,2R,3R,4R,5S,6R)- and (1S,2R,3R,4S,5S,6R)-3,4,5,6-tetrahydroxy derivatives of 2-aminocyclohexanecarboxylic acid have been achieved by a stereospecific Diels–Alder reaction between ... -
Viscosity behaviour of particles with non-adsorbing polymers Part III—experimental study
(Elsevier B.V. www.elsevier.com/locate/colsurfa, 2004)A series of well characterised cis-poly(isoprene) (PIP) polymers (Mw = 1180, 8000, 28 300, 31 500, 86 000, 115 000 and 130 000) have been added to dispersions of poly(12-hydroxystearic acid) (PHS) coated poly(methylmethacrylate) ... -
A fluorescence spectroscopic study of a coagulating protein extracted from Moringa oleifera seeds
(Elsevier B.V. www.elsevier.com/locate/colsurfb, 2007)The fluorescence studies of coagulating protein extracted from Moringa oleifera seeds have been studied using steady-state intrinsic fluorescence. The fluorescence spectra are dominated by tryptophan emission and the ... -
Gravity evidence for a larger Limpopo Belt in southern Africa and geodynamic implications
(Royal Astronomical Society. http://www.wiley.com/bw/journal.asp?ref=0956-540X&site=1, 2002)The Limpopo Belt of southern Africa is a Neoarchean orogenic belt located between two older Archean provinces, the Zimbabwe craton to the north and the Kaapvaal craton to the south. Previous studies considered the Limpopo ... -
Volumetric Properties of (Difurylmethane + Alkan-1-ol) Binary Mixtures at 298.15 K
(Journal of Solution Chemistry., 2006)Densities (ρ) of the binary systems of {difurylmethane+(ethanol or propan-1- ol or butan-1-ol or pentan-1-ol or hexan-1-ol)} have been measured with an Anton Paar DMA 4500 vibrating-tube densimeter over the entire ... -
Mycoflora and natural occurrence of aflatoxins and fumonisin B1 in cassava and yam chips from Benin, West Africa
(Elsevier B.V. www.elsevier.com/locate/ijfoodmicro, 2008)The presence of fungi, aflatoxins and fumonisin B1 in cassava and yam chips (during 28 processing and storage) were evaluated during two consecutive seasons in two agroecological zones of Benin (Northern Guinea Savannah, ... -
Environmental change and sustainability issues in the Kalahari region
(Elsevier Science Ltd, http://www.elsevier.com/wps/find/journaldescription.cws_home/622855/description#description, 2003)The collection of papers in this special edition of the Journal of Arid Environments is a sequel to a Workshop held in Maun, Botswana, in October 2000, on the theme Climate Change, Biodiversity and Multi-species Production ... -
Prenylated arylbenzofuran derivatives from Morus mesozygia with antioxidant activity
(Elsevier Ltd. www.elsevier.com/locate/phytochem, 2008)Five prenylated arylbenzofurans, moracins Q–U, were isolated from Morus mesozygia (Moraceae). Their structures were elucidated on the basis of spectroscopic evidence. Along with these compounds, 3b-acetoxyurs- 12-en-11-one, ... -
Evaluation of methods for the isolation, detection and quantification of cyanobacterial hepatotoxins
(Elsevier Ltd. www.elsevier.com/locate/aquatox, 2006)Cyanobacterial hepatotoxins such as microcystins and nodularins have been responsible for the poisoning of both animals and humans who ingest or come into contact with toxic blooms. They are extremely stable in water due ... -
Seed-bank analysis for herbaceous species along grazing gradients in the Sandveld and Hardveld grazing areas of Botswana
(Botswana College of Agriculture, http://www.bca.bw/Research/bojaasBca/InstructionToAuthors.htm, 2007)Grasses and forbs in Southern Africa have been understudied in terms of species richness and factor that affect diversity patterns. To gain a better understanding of factors affecting patterns of herbaceous plant species ... -
Influence of sodium adsorption ratio on sodium and calcium breakthrough curves and saturated hydraulic conductivity in soil columns.
(Csiro, http://www.publish.csiro.au/nid/84.htm, 2007)The paper examines the effects of electrolyte concentration and sodium adsorption ration (SAR) on the relative saturated hydraulic conductivity (RHC) and the ionic behaviour of calcium (Ca) and sodium (Na) ions in the Na-Ca ... -
The socio-cultural impacts of tourism development in the Okavango Delta, Botswana
(Channel view publications, http://www.multilingual-matters.net/jtc/default.htm, 2004)The objective of this article is to assess the socio-cultural impacts of tourism development in the Okavango Delta, Botswana. This paper largely relied on the research work and reports by the author in the Okavango Delta ... -
Origin and palaeo-environments of calcareous sediments' in the Moshaweng dry valley, Southeast Botswana
(John Wiley & Sons, Ltd. http://www3.interscience.wiley.com/journal/117935722/grouphome/home.html, 2002)Quaternary sedimentation in the Moshaweng dry valley of southeastern Botswana is evaluated on the basis of geomorphological evolution and sedimentological analyses. Stratigraphic evidence reveals an 'upper surface (1095 ... -
Preventive and protective effects of wild basil in ethanol-induced liver toxicity in rats
(British Journal of Biomedical Science. http://www.ibms.org/index.cfm?method=publications.british_journal, 2007)In the present study, preventive and protective effects of Ocimum gratissimum in ethanol-induced hepatotoxicity are assessed in albino rats. A methanol extract of O. gratissimum leaves is prepared, with a yield of 3.5% ... -
Recent results from natural product research at the University of Botswana
(IUPAC. http://www.iupac.org/publications/pac/, 2001)Marketed plants are very important items of trade in many parts of the world. The community uses these for a variety of purposes such as foods, cosmetics, flavors, spices, and medicines. It seems that plants that are ... -
General Properties and the Fatty Acid Composition of the Oil from the Mophane Caterpillar, Imbrasia belina
(AOCS Press. http://www.springerlink.com/content/0003-021X, 1998)A preliminary investigation of the bulk properties of the oil from the edible mophane caterpillar (phane), Imbrasia belina, showed a significant difference in the iodine values of the oils from mature and young phane. ... -
Molecular Identification of Campylobacter concisus
(American Society for Microbiology. http://jcm.asm.org/, 2001)A 1.6-kb DNA fragment isolated from a Campylobacter concisus genomic library gave C. concisus-specific restriction fragment length patterns when it was used as a probe in hybridization studies. All of the strains ... -
The Free-Radical Copolymerization of Difurylmethane with Maleic anhydride
(South African Journal of Chemistry. <http://ejour.sabinet.co.za/images/ejour/chem/chem_v55_a1.pdf>., 2002)The copolymerization of difurylmethane with maleic anhydride in the presence of azobisisobutyronitrile as an initiator has been investigated at 65 °C, 72 °C and 85 °C in different solvents. Reaction feeds containing 85 ... -
Quality and Compositional Studies of Some Edible Leguminosae Seed Oils in Botswana
(AOCS Press. http://www.springerlink.com/content/120382/, 1998)Seed oils were extracted with n-hexane from three edible Leguminosae seeds: Tylosema esculentum, Xanthocercis zambesiaca, and Bauhinia petersiana, giving yields of 48.2, 17.6, and 20.8% (w/w), respectively. Some physical ...