Faculty of Science: Recent submissions
Now showing items 101-120 of 381
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On the subspace problem for Quasi-normed spaces
(ScienceDomain International; www.sciencedomain.org, 2016-07-02)A definitive positive answer to the so-called proper subspace problem (a.k.a. the atomic space problem) for quasi-normed spaces is given: every infinite dimensional quasi-normed space has a proper closed infinite-dimensional ... -
Application of Geoelectrical Resistivity Method to the Assessment of Groundwater Pollution: A case Study of Onibu-Eja Active Open Dumpsite, Osogbo, Southwestern Nigeria
(World Academic Publishing, www.academicpub.org/, 2016)Electrical resistivity methods using the dipole – dipole array and Schlumberger Vertical Electrical Sounding (VES) techniques were conducted at the Onibu-Eja active open Dumpsite, Osogbo, Southwestern Nigeria in assessing ... -
Two new pterocarpans and a new pyrone derivative with cytotoxic activities from Ptycholobium contortum (N.E.Br.) Brummitt (Leguminosae): revised NMR assignment of mundulea lactone
(Springer International Publishing, http://link.springer.com, 2016)Background: Ptycholobium is a genus related to Tephrosia which comprises only three species. Compared to Tephrosia, which has been phytochemically and pharmacologically studied, Ptycholobium species have only few or no ... -
Radio Wave Propagation Experiment in Sugarcane Fire Environments
(Scientific Research Publishing Inc., http://www.scirp.org, 2016)Large fires have an effect of suppressing Very or Ultra High Frequency (VHF/UHF) radio wave signals strength which consequently impact negatively on the efficiency of radio communications at the frequency ranges. Mobile ... -
Controlled Texturing of Aluminum Sheet for Solar Energy Applications
(Scientific Research Publishing Inc., http://www.scirp.org/, 2015)Aluminum sheets were polished to reduce ruggedness and then textured in varying acid-ethanol concentration etchant to form pores. The textured surface was characterized structurally by using X-ray diffraction (XRD) which ... -
Absorption of Microwaves in Low Intensity Eucalyptus Litter Fire
(Scientific Research Publishing Inc., http://www.scirp.org, 2015)A fuel bed was constructed where various vegetation species could be used as combustion fuel. The fuel bed was equipped with a thermocouple to measure fire temperature and a two-port automatic network analyser to measure ... -
Gravity and Aeromagnetic Studies of the Filabusi Greenstone Belt, Zimbabwe Craton: Regional and Geotectonic Implications
(Scientific Research Publishing Inc., http://www.scirp.org, 2012)The Filabusi greenstone belt (FGB), Zimbabwe craton, has been geologically remapped relatively recently but its regional tectonic setting and subsurface structure have, until now, remained unresolved. This paper presents ... -
Geoelectric Evaluation of Groundwater Potential and Vulnerability of Overburden Aquifers at Onibu-Eja Active Open Dumpsite, Osogbo, Southwestern Nigeria
(Scientific Research Publishing Inc., http://www.scirp.org/journal/JWARP/, 2016)Electrical resistivity method was used to assess groundwater potential and vulnerability of overburden aquifers at Onibu‐Eja active open dumpsite, Osogbo, Southwestern Nigeria. Eighteen Vertical Electrical Sounding (VES) ... -
Optical Characterization of TiO2-bound (CuFeMnO4) Absorber Paint for Solar Thermal Applications
(Science and Education Publishing, http://www.sciepub.com/journal/AJER, 2016)A composite thin film consisting of TiO2 (binder), uniformly mixed CuFeMnO4 paint (solar absorber) was coated on textured aluminum sheets by dip coating. The film’s elemental analysis was done using energy dispersive x-ray ... -
Extensions of the Lusin's Theorem, the Severini-Egorov's Theorem and the Riesz Subsequence Theorems
(ScienceDomain International; www.sciencedomain.org, 2016-10-14)We give extensions of the Lusin’s Theorem, the Severini-Egorov’s Theorem, and the Riesz Subsequence Theorems to the setting of a non-additive vector valued set functions and sequences of functions taking values in general ... -
Refining the Y chromosome phylogeny with southern African sequences
(Springer, http://link.springer.com/journal/439, 2016)The recent availability of large-scale sequence data for the human Y chromosome has revolutionized analyses of and insights gained from this non-recombining, paternally inherited chromosome. However, the studies to date ... -
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 ... -
Virtualizing the p-ANAPL library: A step towards drug discovery from African medicinal plants
(Public Library of Science, http://www.plosone.org/, 2014)Background: Natural products play a key role in drug discovery programs, both serving as drugs and as templates for the synthesis of drugs, even though the quantities and availabilities of samples for screening are often ... -
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 ... -
Screening of the pan-African Natural Product Library identifies ixoratannin A-2 and boldine as novel HIV-1 inhibitors
(Public Library of Science, http://www.plosone.org/, 2015)The continued burden of HIV in resource-limited regions such as parts of sub-Saharan Africa, combined with adverse effects and potential risks of resistance to existing antiretroviral therapies, emphasize the need to ... -
Free radical scavenging and antioxidant properties of a truffle, Kalaharituber pfeilii found in Kalahari deserts of Botswana
(Int.J.Bioassays, http://www.ijbio.com/index.php/ijb, 2015)Natural anti-oxidants are the good source for scavenging excess of free radicals generated in the body after oxidative stress. The present study is aimed at in vitro evaluation of free radical scavenging potentials of two ... -
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% ... -
Fungi associated with seeds of two varieties of spinach beet and their possible control in vitro by fungicide treatment
(Int.J.Bioassays, http://www.ijbio.com, 2015)Seeds of Two spinach beet varieties namely; Fordhook giant and Lucullus obtained from commercial markets around Gaborone were used for detection of seed-borne fungi and their possible control in vitro by fungicide. Four ... -
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 ... -
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 ...