Browsing Faculty of Science by Title
Now showing items 41-60 of 381
-
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 ... -
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 ... -
Biosurfactant production by halophilic yeasts isolated from extreme environments in Botswana
(Oxford University Press, https://academic.oup.com/femsle, 2021)Nine morphologically distinct halophilic yeasts were isolated from Makgadikgadi and Sua pans, as pristine and extreme environments in Botswana. Screening for biosurfactant production showed that Rhodotorula mucilaginosa ... -
Biosynthesis of silver nanoparticles with potent antimicrobial activity using lactic acid bacteria
(Society for Advance Healthcare Research, http://www.ejbps.com/, 2019-03)In this study, Lactic Acid Bacteria isolated from traditional fermented foods were screened for the synthesis of silver nanoparticles. Antimicrobial activity of the synthesized nanoparticles was assayed against several ... -
Bis(pyrazolyl) palladium(II), platinum(II) and gold(III) complexes: Syntheses, molecular structures and substitution reactions with L-cysteine
(Elsevier Science Ltd, www.elsevier.com/locate/ica, 2009)A series of pyrazolyl palladium(II), platinum(II) and gold(III) complexes, [PdCl2(3,5-R2bpza)] {R = H (1), R = Me (2), bpza = bis-pyrazolyl acetic acid}, [PtCl2(3,5-R2bpza)] {R = H (3a), R = Me (4)}, [AuCl2(3,5- R2bpza)]Cl ... -
Bivarate models: relationships between solar irradiation and either sunshine duration or extremum temperatures
(Elsevier Science Ltd. www.elsevier.com/locate/renene, 2003)The Republic of Botswana is one of the sunniest countries in Southern Africa. It has very little cloud cover, insufficient rainfall, very low humidity, and very low wind speed throughout the year for most parts of the ... -
Bufadienolides and other constituents of Urginea sanguinea
(Georg Thieme Verlag, https://www.thieme.com/books, 1997)Fresh bulbs of Urginea sanguinea yielded stigmasterol, phloroglucinol, phloroglucinol 1-β-D-glucopyranoside (phlorin), scillaren A, a novel compound 5α-4,5-dihydroscillaren A (1), salicylic acid, and 3-hydroxy-4-methylbenzoic ... -
Building computer graphics education in southern Africa
(Elsevier Science Ltd, http://www.elsevier.com/locate/cag, 2003)This note discusses issues in building the educational base for computer graphics growth in developing countries, particularly in southern Africa. It is based on a delegation’s visit to southern Africa in the spring of ... -
A ca. 200Ma hiatus between the Lower and Upper Transvaal Groups of southern Africa: SHRIMP U–Pb detrital zircon evidence from the Segwagwa Group, Botswana: Implications for Palaeoproterozoic glaciations
(Elsevier B.V. www.elsevier.com/locate/epsl, 2006)The Segwagwa Group of southeastern Botswana, a correlate of the Pretoria Group of the Transvaal Supergroup of South Africa, consists of a major sequence of siliciclastic sedimentary rocks, minor carbonates and basaltic ... -
A ca. 200Ma hiatus between the Lower and Upper Transvaal Groups of southern Africa: SHRIMP U–Pb detrital zircon evidence from the Segwagwa Group, Botswana: Implications for Palaeoproterozoic glaciations
(Elsevier www.elsevier.com/locate/epsl, 2006)The Segwagwa Group of southeastern Botswana, a correlate of the Pretoria Group of the Transvaal Supergroup of South Africa, consists of a major sequence of siliciclastic sedimentary rocks, minor carbonates and basaltic to ... -
Carriage of micro-organisms by domestic cockroaches and implications on food safety
(ICIPE - African Insect Science for Food and Health, http://journals.cambridge.org/action/displayJournal?jid=JTI, 2006)Domestic cockroaches Blattella germanica were trapped from various homes in Gaborone, Botswana using ‘Dyroach’ traps. Isolations of bacteria, yeasts and moulds were done on external body parts and on the faecal pellets ... -
A case for the promotion of indigenous knowledge for entrepreneurship development in developing countries: The case of Botswana
(Office of Research and Development, University of Botswana. http://journals.ub.bw/index.php/pula/index, 2017)The past decade has experienced economic recession which has manifested itself in higher unemployment figures, especially among the youth including university graduates. For those countries endowed with indigenous knowledge ... -
Cassia abbreviata extracts prevent the ensuing of pre-diabetes in albino rats subjected to sucrose load
(Applied Zoologists Research Association (AZRA), http://www.azra-india.com/, 2016)Two extracts; water extract (CAW) and methanol extract (CAM) from the bark of Cassia abbreviata were prepared. Oral glucose tolerance test was carried out with both the extracts in normal albino SD rats to measure their ... -
Chalcones and other constituents of Dorstenia prorepens and Dorstenia zenkeri
(Elsevier Science Ltd. www.elsevier.com/locate/phytochem, 2002)The twigs of Dorstenia prorepens furnished the digeranylated chalcone, 5,30-(3,7-dimethyl-2,6-octadienyl)-3,4, 20,40-tetrahydroxychalcone while Dorstenia zenkeri yielded the 30,40-(3-hydroxy-2,2-dimethyldihydropyrano)-4 ... -
Characterization and Compositional Studies of the Oils from Some Legume Cultivars, Phaseolus vulgaris, Grown in Southern Africa
(AOCS Press., 2004)Seed oils from six legume cultivars of Phaseolus vulgaris, grown in the Kingdom of Lesotho, were extracted and their physicochemical properties and FA compositions were determined in order to compare their dietary lipids ... -
Characterization of agriculture-related land degradation in eastern and western parts of Botswana
(University of Botswana, http://www.ub.bw, 2005-04)A study was carried out during 1998-2001 with the objective of, firstly, assessing the impact of cultivation on soil quality, and secondly, evaluating the effects of human and animal activities on soil erosion and range ... -
Characterization of enriched lithospheric mantle components in ∼2.7 Ga Banded Iron Formations: An example from the Tati Greenstone Belt, Northeastern Botswana
(Elsevier www.elsevier.com/locate/precamres, 2009)Major and trace element, samarium (Sm)–neodymium (Nd) and lead (Pb) isotopic analyses of individual mesobands of five Banded Iron Formations (BIFs) and associated volcanic and sedimentary rocks from the Neoarchean Tati ... -
Characterization of soils in the Gamodubu landfill area in the Kweneng District, Botswana
(International Scholars Journals, http://internationalscholarsjournals.org/journal/ajss/home, 2019-01)Understanding soil attributes guides arable farming initiatives in many countries, especially developing countries. In this study, soils of the Gamodubu area, in the Kweneng District, Botswana, were analysed to determine ... -
Chemical constituents of Treculia acuminata and Treculia africana (Moraceae)
(Elsevier Ltd. www.elsevier.com/locate/biochemsyseco, 2007)Three species of the genus Treculia namely, Treculia acuminata Baill., Treculia africana Decne ex. Treà ´cul and Treculia obovoidea N.E.Br. grow in the humid rain forest of southwest Cameroon. They are also widely ... -
Chemical reaction and Hall effects on visco-elastic fluid flow past an inclined moving plate in the presence of heat generation/absorption
(ESRSA Publications Pvt. Ltd., https://www.ijert.org/, 2016)The present work analyzes the Hall and Chemical reaction effects on two dimensional MHD flow of a Visco-elastic fluid past an inclined moving plate by taking double diffusive convection in the presence of Heat generation. ...