Now showing items 1-20 of 353

  • Some relations between admissible monomials for the polynomial algebra 

    Mothebe, Mbakiso Fix; Uys, Lafras (Hindawi Publishing Corporation, www.Hindawi.com, 2015)
    Let P(𝑛) = F2[𝑥1, . . . , 𝑥𝑛] be the polynomial algebra in 𝑛 variables 𝑥𝑖, of degree one, over the field F2 of two elements. The mod-2 Steenrod algebra A acts on P(𝑛) according to well known rules. A major problem ...
  • Biosynthesis of silver nanoparticles with potent antimicrobial activity using lactic acid bacteria 

    Wale, Kabo Ronald; Ogopotse, Wathuto; Loeto, Daniel; Mokgweetsi, Phatsimo; Letsholo, Baemedi; Muzila, Mbaki; Khare, Krishna Behari; Makate, Ntebaleng (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 ...
  • GC-MS analysis and preliminary antimicrobial activity of albizia adianthifolia (Schumach) and pterocarpus angolensis (DC) 

    Abubakar, Mustapha N.; Majinda, Runner R.T. (MDPI, https://www.mdpi.com/, 2016-01-29)
    The non-polar components of two leguminoceae species Albizia adianthifolia (Schumach), and Pterocarpus angolensis (DC) were investigated. GC-MS analysis of the crude n-hexane and chloroform extracts together with several ...
  • Antimicrobial Flavonoids from Bolusanthus speciosus 

    Bojase, Gomotsang; Majinda, Runner R.T.; Gashe, Berhanu A.; Wanjala, Cornelius C.W. (Georg Thieme Verlag, https://www.thieme.com/, 2002)
    A new isoflavanone namely 3,5,7,2′,4′-pentahydroxy-8,3′-di(γ,γ-dimethylallyl)isoflavanone (bolusanthin II) and four new pterocarpans identified as 3-hydroxy-6′,6′-dimethylpyrano[2′,3′:1,2] [6aR,11aR]-8,9-methylenedioxypterocarpan ...
  • Phenolic and antibacterial constituents of Vahlia capensis 

    Majinda, Runner R.T.; Motswaledi, Modisa; Waigh, Roger D.; Waterman, Peter G. (Georg Thieme Verlag, https://www.thieme.com/books-main/biochemistry/product/3494-planta-medica, 1997)
    The n-butanol fraction of Vahlia capensis yielded kaempferol, quercetin, afzelin, astragalin, quercitrin, iso-quercitrin, rutin, gallic acid, chiro-inositol, dulcitol, and a novel biflavonoid, VC-15B (vahlia biflavone). ...
  • Bufadienolides and other constituents of Urginea sanguinea 

    Majinda, Runner R.T.; Waigh, Roger D.; Waterman, Peter G. (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 ...
  • Erythrinaline Alkaloids and Antimicrobial Flavonoids from Erythrina latissima 

    Wanjala, Cornelius C.W.; Juma, Benard F.; Bojase, Gomotsang; Gashe, Berhanu A.; Majinda, Runner R.T. (Georg Thieme Verlag, https://www.thieme.com/books-main/biochemistry/product/3494-planta-medica, 2002)
    The seed pods of Erythrina latissima yielded erysotrine, erysodine, syringaresinol, vanillic acid, a new erythrina alkaloid, (+)-10,11-dioxoerysotrine, which was lethal to brine shrimp and 2-(5′-hydroxy-3′-methoxy ...
  • Antioxidant and antidiabetic potential of Myrothamnus flabellifolius found in Botswana 

    Kwape, Tebogo E.; Majinda, Runner R.T.; Chaturvedi, Padmaja (Cogent OA, https://www.cogentoa.com/journal/biology, 2016-12-29)
    The total phenol content, antioxidant and antidiabetic activity of Myrothamnus flabellifolius (MF) were investigated. The study revealed 70% ethanol/water (EW70), 70% methanol/water (MW70) and methanol (Me) extracts to ...
  • Antibiotic activity of selected Botswana Medicinal Plants 

    Majinda, Runner R.T.; Motswaledi, Modisa S. (The Botswana Society, http://journals.ub.bw/index.php/bnr/index, 1998)
    A number of plant extracts from selected Botswana Medicinal Plants were tested against a battery of organisms for antibiotic activity. The antibiotic profile for most of these extracts seems to support their traditional ...
  • Fatty acid composition and antimicrobial activity of Baphia massaiensis seed oil 

    Keroletswe, Ngonye; Mazimba, Ofentse; Majinda, Runner R.T.; Masesane, Ishmael (SCIENCEDOMAIN International, http://www.journaljocamr.com/index.php/JOCAMR/index, 2017-04-03)
    Aims: The seed oil composition of Baphia massaiensis seeds was determined using 1H NMR and GC-MS techniques. The seed oil was also screened for antimicrobial activity. Study Design: The study was designed to determine ...
  • Electron states in a sinusoidally deformed cylindrical quantum wire 

    Tshipa, Moletlanyi (Springer Nature Switzerland AG. Part of Springer Nature, https://link.springer.com/journal/40094, 2017)
    Electron states in a sinusoidally deformed cylindrical nanowire are probed within the effective mass approximation. The nanowire is immersed in a homogeneous magnetic field applied parallel to the axis of the wire. The ...
  • Communication: Remarkable electrophilicity of the oxalic acid monomer: An anion photoelectron spectroscopy and theoretical study 

    Buonaugurio, Angela; Graham, Jacob; Buytendyk, Allyson; Bowen, Kit H.; Ryder, Matthew R.; Keolopile, Zibo G.; Haranczyk, Maciej; Gutowski, Maciej (AIP Publishing LLC., https://aip.scitation.org/journal/jcp, 2014-06-14)
    Our experimental and computational results demonstrate an unusual electrophilicity of oxalic acid, the simplest dicarboxylic acid. The monomer is characterized by an adiabatic electron affinity and electron vertical ...
  • The P wavespeed structure below and around the Kaapvaal craton to depths of 800 km, from traveltimes and waveforms of local and regional earthquakes and mining-induced tremors 

    Simon, R.E.; Wright, C.; Kgaswane, E.M.; Kwadiba, M.T.O. (Oxford University Press, https://academic.oup.com/gji, 2002-10-01)
    An average P-wavespeed model from the surface to depths of 800 km was derived for southern Africa using traveltimes and waveforms from earthquakes recorded at stations of the Kaapvaal and South African National networks. ...
  • Identification of sources of aerosol particles in three locations in eastern Botswana 

    Chimidza, S.; Moloi, K. (American Geophysical Union, https://agupubs.onlinelibrary.wiley.com/journal/21562202, 2000-07-27)
    Airborne particles have been collected using a dichotomous virtual impactor at three different locations in the eastern part of Botswana: Serowe, Selibe‐Phikwe, and Francistown. The particles were separated into two fractions ...
  • Antibacterial activity of crude extracts and pure compounds isolated from Vernonia galamensis leaves 

    Majinda, Runner R.T.; Tafesse, Geremew; Mekonnen, Yalemtsehay; Makonnen, Eyasu; Bojase-Moleta, Gomotsang; Yeboah, Samuel O. (Academic Journals, https://academicjournals.org/journal/AJPP, 2018-03-22)
    The aim of this study was to test the antibacterial property of the extract of the leaves and isolated compounds of Vernonia galamensis that is traditionally claimed to have diverse medicinal use. The disk diffusion method ...
  • Effect of erythrinaline alkaloids from Erythrina lysistemon on human recombinant caspase-3 

    Juma, Bernard F.; Armwood, Shanta; Ombito, Japheth O.; Majinda, Runner R.T.; Gwebu, Ephraim T. (Academic Journals, https://academicjournals.org/, 2018-04-22)
    Prostate cancer is a leading killer disease among men all over the world. Inducing apoptosis (programmed cell death) is a strategic chemotherapeutic approach. Caspase-3 is a key effector of apoptosis, and its activation ...
  • Mantle structure beneath the incipient Okavango rift zone in southern Africa 

    Moidaki, Moikwathai; Yu, Youqiang; Liu, Kelly H.; Huang, Zhouchuan; Zhao, Dapeng; Reed, Cory A.; Lei, Jianshe; Gao, Stephen S. (The Geological Society of America, https://pubs.geoscienceworld.org/, 2107-02-01)
    Numerous investigations of the mature segments of the East African rift system (EARS) have significantly improved our understanding of the structure and processes associated with well-developed continental rifts. In contrast, ...
  • Elemental concentrations of aerosols in the city of Gaborone 

    Moloi, K.; Verma, T.S. (Infogain Publication, https://ijeab.com/, 2107-03)
    This paper presents aerosol studies carried out in Gaborone, the capital city of Botswana. The Gaborone aerosol is varied consisting of elements from Si to Au. Traffic contribution to the aerosol of Botswana is clearly ...
  • Geophysical and hydrogeological groundwater prospectivity mapping in the Kraaipan Granite-Greenstone Terrain, Southeast Botswana 

    Ranganai, Rubeni T.; Moidaki, Moikwathai D.; King, James G.; Bagai, Zibisani B. (Scientific Research Publishing Inc., https://www.scirp.org/journal/jwarp/, 2017-10)
    Application of regional geophysical methods for hydrogeological purposes has increased over the last two decades especially in arid and semi-arid areas. A project to map the Kraaipan granite-greenstone terrain in southeast ...
  • Measurement of breakdown electric field strength for vegetation and hydrocarbon flames 

    Maabong, Kago Ernest; Mphale, Kgakgamatso; Letsholathebe, Douglas; Chimidza, Samuel (Scientific Research Publishing Inc., https://www.scirp.org/, 2018)
    A significant number of fire-induced power disruptions are observed in several countries every year. The faults are normally phase-to-phase short circuiting or conductor-to-ground discharges at mid-span region of the ...