STAFF

Baghali Guys Mathapa

Senior Lecturer

Baghali Guys Mathapa

Senior Lecturer

Faculty of Sciences (Department of Physical and Chemical Sciences (PCS))

P/Bag 0027 Gaborone
+2673650561 ; cell 77400153
[email protected]

BIOGRAPHY
TEACHING
RESEARCH
CURRENT PROJECTS
ALL PUBLICATIONS

PhD topic: Cyclodextrin Structures and Microcapsules for encapsulation of active ingredients

Degrees

PhD in Physical Chemistry (Colloids and Interfacial Science), University of Hull (2014), UK.
Postgraduate Diploma in Research, University of Hull (2013), UK
MSc in Physical Chemistry, University of Botswana (2007), Botswana
BSc in Chemistry, University of Botswana (2000), Botswana.

Professional Societies

Member of Royal Society of Chemistry.

Reaction Stoichiometry
Properties of gases and gas laws
Solution colligative properties
Thermochemistry
Chemical equilibrium
Acids and bases
Electrochemistry
Chemical Kinetics

My research is an interdisciplinary work focused on microencapsulation technologies based on the use of natural oils, natural surfactants as well as molecules and materials of natural origin. A particular emphasis is on novel materials obtained by basic chemistry of self-assembly of cyclodextrin molecules at fluid interfaces in relation to application in surfactant-free emulsions and foams, microcapsules and colloidosomes. Empahasis in on Interface & colloidal chemistry and product development.

Techniques used include; surface and interfacial tension measurements, optical microscopy, fluorescence and electron microscopy, laser diffraction and zeta potential.

https://divagri.org/

Google Scholar

https://scholar.google.co.uk/citations?user=aMlk59QAAAAJ&hl=en

Baghali G. Mathapa and Vesselin N. Paunov (2014). ‘Fabrication of viable cyborg cells with cyclodextrin functionality’. Biomaterials Science. Vol. 2 (2): 212-219.

https://pubs.rsc.org/en/content/articlelanding/2014/bm/c3bm60162e

Baghali G. Mathapa and Vesselin N. Paunov (2013). ‘Cyclodextrin stabilized emulsions and cyclodextrinosomes’. Physical Chemistry Chemical Physics. Vol. 15 (41): 17903-17914.

https://pubs.rsc.org/en/content/articlelanding/2013/cp/c3cp52116h

Baghali G. Mathapa and Vesselin N. Paunov (2013). ‘Self-assembly of cyclodextrin–oil inclusion complexes at the oil–water interface: a route to surfactant-free emulsions’. Journal of Materials Chemistry A. Vol. 1 (36): 10836-10846.

https://pubs.rsc.org/en/content/articlelanding/2013/ta/c3ta12108a

Baghali G. Mathapa and Vesselin N. Paunov (2013). ‘Nanoporous cyclodextrin-based co-polymer microspheres for encapsulation of active components’. Journal of Materials Chemistry B. Vol. 1 (29): 3588-3598

https://pubs.rsc.org/en/content/articlelanding/2013/tb/c3tb20481b

Baghali G. Mathapa and Vesselin N. Paunov (2013). ‘Fabrication of novel cyclodextrin-polyallylamine hydrochloride co-polymeric microcapsules by templating oil-in-water emulsions’. Soft Matter. Vol. 9 (19): 4780-4788.

https://pubs.rsc.org/en/content/articlelanding/2013/sm/c3sm27935a

Motlhanka D. M. T. and Mathapa G (2011). ‘Antioxidant activities of crude extracts from medicinal plants used by diabetic patients in Eastern Botswana’. Journal of Medicinal Plants Research. Vol. 6 (42): 5460-5463

Baghali G. Mathapa and Jamil Ahmad (2010). ‘Reactions in Monolayers: The Oxidation of Thiol to Disulfide at Various Initial Surface Pressures’. Asian Journal of Chemistry. Vol. 22 (8): 5841-5845

Mutanyatta, Joan; Mathapa, Baghali G.; Shushu, Deborah D.; Abegaz, Berhanu M (2003).‘Homoisoflavonoids and xanthones from the tubers of wild and in vitro regenerated Ledebouria graminifolia and cytotoxic activities of some of the homoisoflavonoids’. Phytochemistry. Vol. 62 (5): 797-804.

https://www.sciencedirect.com/science/article/abs/pii/S0031942202006222

Banyaladzi D. Paphane

Senior Lecturer

Banyaladzi D. Paphane

Senior Lecturer

Faculty of Sciences (Department of Physical and Chemical Sciences (PCS))

P/Bag 0027 GABORONE
+2673650316
[email protected]

BIOGRAPHY
TEACHING
RESEARCH
CURRENT PROJECTS
ALL PUBLICATIONS

Master of Science Degree Topic: Kinetic studies on the reactions of some Tetrakis(arylisocyanide)bis(perchlorato)-cobalt(II) complexes with pyridines in non aqueous media. The dissertation examines the kinetics of the reduction of selected Tetrakis(arylisocyanide)bis(perchlorato)cobalt(II) complexes by Pyridine type ligands in non-coordinating solvents.
Master of Science Degree in Chemistry: University of Botswana (2005), Botswana.
Bachelor of Science Degree in Chemistry and Environmental Science: University of Botswana (2003), Botswana.

Professional Membership

Vice Secretary of the African Material Research Society (AMRS)
Committee Member of the African Network of Analytical Chemists (SEANAC)
Member of the Chemical Society of Botswana
Member of the Botswana Academy of Science

Physical and Organic Chemistry
General and Inorganic Chemistry
Organometallic Chemistry
Metallurgical Assay Methods
Instrumental Methods of Analysis
Chemical Catalysis

Organo-metallic synthesis and Chemical Catalysis
Environmental and Green Chemistry
Alternative green energy sources

Investigation of oils from Botswana indigenous plants as a feedstock for the production of bio-diesel
Determination of efficacy and environmental friendliness of chemical control methods of bush encroachment in Botswana pastures.

Google Scholar

https://scholar.google.com/citations?user=B_ckWX8AAAAJ&hl=en

B. D. Paphane, R. Gontse, T. Francis and K. Sonno, 2017, Extraction of Oil From Stramonium Datura Seeds as Potential Feed-Stock For Bio-Diesel Production, International Journal of Advanced Research, 5(7), 1911-1917.

D. Mogopodi, B. D. Paphane, and S. Petros, (2015), Assessment of chemical management practices and safety in junior secondary school laboratories in Gaborone, Journal of Chemical Health & Safety, 22, 17-27.

B. D. Paphane and L. L. R. Ramirez, (2013), Chemical Pre-treatment of Anionic Surfactants Contaminated Waste Water at Enaspol A. S. using H2O2/UV Light Waste Water Pre-Treatment Method. Journal of Environmental and Analytical Toxicology, 3 (181), pg 1-4. dol: 4172/2161-0525.1000181

B. D. Paphane, B. Nkoane and O. Oyetunji, (2013), Kinetic studies on the of leaching reactions in the autoclave circuit of the Tati Hydrometallurgical Demonstration Plant, The Journal of the Southern African Institute of Mining and Metallurgy, 113, pg 485-489.

O. A. Oyetunji, B. D. Paphane and C. A. L. Becker, 2009, ‘Substitution and Reduction Reactions Between some tetrakis(arylisocyanide)bis(perchlorato)cobalt(II) Complexes and two Amines: Basicity and Steric Effects’, Asian Journal of Chemistry, 21, pg 5337-5344.

O. A Oyetunji, B. D. Paphane and C. A. L. Becker, 2005. ‘Kinetic studies on the reactions of some tetrakis(arylisocyanide)cobalt(II) complexes with pyridine in 2,2,2-trifluoroethanol’, Transition Metal Chemistry, 31 (7), pg 951-957.

Olekile Tibe

Senior Lecturer

Olekile Tibe

Senior Lecturer

Faculty of Sciences (Department of Physical and Chemical Sciences (PCS))

P/Bag 0027 GABORONE
+267 3650281
[email protected]

BIOGRAPHY
TEACHING
RESEARCH
CURRENT PROJECTS
ALL PUBLICATIONS

PhD topic: Phenolics and Condensed Tannins of Forage Plants from Botswana and their Biological Significance

Degrees

1. PhD in Chemistry, Massey University (2012), Palmerston North, New Zealand

2. MSc in Chemistry, Massey University (2004), Palmerston North, New Zealand

3. BSc in Chemistry and Environmental Science, University of Botswana (1997), Gaborone, Botswana

1. Organic Chemistry

2. Analytical Chemistry

Polyphenols/condensed/hydrolysable tannins from indigenous foods, forages, medicinal plants and their health and nutritional benefits in animals and humans. Separation, characterization and quantification of polyphenolic compounds in indigenous foods and forages, medicinal plants, new studies of methods of extraction and purification, Chemical transformations of polyphenols, biological activity: antiparasitic, antimicrobial, antioxidant, immunostimulatory and other biological properties of polyphenols. Nutritional and antinutritional factors in indigenous foods, forages and medicinal plants

Potential Research topics

1. Nutrient, Antinutritional Factors, Heavy Metals and Polyphenols from Indigenous Edible Plants of Botswana

2. Polyphenols from Forage Plants in Botswana

3. Polyphenols from Medicinal Plants in Botswana

1. Polyphenols from Forage Plants in Botswana

2. The role played by ethnoveterinary medicine in controlling gastrointestinal nematodes in goats. MSc Student supervision, Mr Island Ngwenya, January 2019

Google Scholar

https://scholar.google.com/citations?user=vo-TKekAAAAJ&hl=en

Tibe, O., Harding, D.R., Lesperance, L. (2014). ‘Condensed tannins and flavonols of selected forage plants from Botswana (Hedysarum coronarium)’. Asian Journal of Agriculture and Food Sciences, Vol. 2: 478-486.

Tibe, O., Sutherland, I., Lesperance, L., and Harding, D.R. (2013). ‘The effect of purified condensed tannins of forage plants from Botswana on the free-living stages of gastrointestinal nematode parasites of livestock’. Veterinary Parasitology, Vol. 197: 160-167.

Tibe, O., Sutherland, I., Lesperance, L., Pernthaner, A., and Harding, D.R. (2012). ‘Condensed tannins from Botswana forage plants are effective priming agents of gamma delta T cells in ruminants’. Veterinary Immunology and Immunopathology. Vol. 146 (2): 237-244.

Tibe, O., Lesperance, L., Fraser, K., and Harding, D.R. (2011). ‘Condensed tannins and flavonoids from the forage legume Sulla (Hedysarum coronarium)’. Journal of Agricultural and Food Chemistry, Vol. 59 (17): 9402-9409.

Amarteifio, J.O., Tibe, O., and Njogu, R.M. (2010). The nutrient composition of Bambara groundnut (Vigna subterranean (L) Verdc) cultivated in Southern Africa. Agricultura Tropica Et Subtropica, Vol. 43 (1): 1-5.

Sello Alfred Likuku

Associate Professor

Sello Alfred Likuku

Associate Professor

Faculty of Sciences (Department of Physical and Chemical Sciences (PCS))

P/Bag 0027 GABORONE
+2673650146
[email protected]

BIOGRAPHY
TEACHING
RESEARCH
CURRENT PROJECTS
ALL PUBLICATIONS

PhD Thesis: The influence of topography and vegetation canopy on the deposition of atmospheric particulates studied with 210Pb and 137Cs in soil inventory measurements.

MSc Thesis: Electron density determination using a Compton scattering technique for characterization of materials (biological, environmental and industrial).

MSc Project: Determination of detection limits for Americium (241Am) in food and Plutonium (239Pu) in environmental samples.

BSc (Physics & Environmental Science): University of Botswana

Post Graduate Diploma in Education (PGDE): University of Botswana

MSc (Radiation & Environmental Protection: University of Surrey (England)

PhD (Environmental Nuclear Physics): University of Edinburgh (Scotland)

IMF Research Fellow: University of Tsukuba (Japan)

PROFESSIONAL RESPONSIBILITIES

Editor in Chief: Botswana Journal of Agriculture and Applied Sciences (BOJAAS)

General Physics

Thermodynamics

Fluid Mechanics

Environmental radionuclides transfer and dynamics estimation to decipher pollutant transport and deposition on terrestrial environments.

Google Scholar

https://scholar.google.com/citations?user=a-sH93AAAAAJ&hl=en

Likuku A. S., Gaboutloeloe, G.K. and Mmolawa, K.B. 2013. Determination and Source Apportionment of Selected Heavy Metals in Aerosol Samples Collected from Sebele. American Journal of Environmental Sciences. 9(2): 188–200.

Likuku A. S. 2011. Deposition rates of atmospheric particulates determined from 210Pb measurements in soils and air. Polish Journal of Applied Environmental Studies. 20(2): 405–410.

Likuku A. S., 2009. Atmospheric transfer and deposition mechanisms of 210Pb aerosols onto forest soils. Water Air and Soil Pollution: Focus 9. 179–184.

Likuku A. S., 2006. Wet deposition of 210Pb aerosols over two areas of contrasting topography. Environmental Research Letters 1

Likuku A. S., Branford, D., Fowler, D., Weston, K., 2006. Inventories of fallout 210Pb and 137Cs radionuclides in moorland and woodland soils around Edinburgh urban area. Journal of Environmental Radioactivity. 90(1): 37–47

Likuku A. S., 2006. Factors influencing ambient concentrations of 210Pb and 7Be over the city of Edinburgh (55.9˚N, 03.2˚W). Journal of Environmental Radioactivity. 87(3): 289–304.

Thato Pholele

Senior Lecturer

Thato Pholele

Senior Lecturer

Faculty of Sciences (Department of Physical and Chemical Sciences (PCS))

P/Bag 0027 GABORONE
+267 3650127
[email protected]

BIOGRAPHY
TEACHING
RESEARCH
CURRENT PROJECTS
ALL PUBLICATIONS

M.Sc topic: Analysis of Dual mode Dielectric Loaded Cavity Filter (inter-cavity coupling)

Degrees

M.Sc in Electronic Systems, University of the Botswana (2010), Botswana.
B.Ed (Science), University of the Botswana (2004), Botswana.

Professional Societies

Botswana Physics Association

Applied Electric and Magnetic fields
Newtonian Mechanics
Optics

Distributed element filters (dielectric loaded cavity filters), coupling of electric and magnetic fields, the use of ICT in education and Agriculture

Potential Research topics

Solar energy

Google Scholar

https://scholar.google.com/citations?user=hZVjNDwAAAAJ&hl=en

T. M. Pholele and J. M. Chuma, “Effects of Combined Apertures on the Magnitudes of Coupling Coefficients of Combline Resonators,” IOP Conf. Ser.: Mater. Sci. Eng., Vol. 67, 2014. DOI: 10.1088/1757-899X/67/1/012005

The effects of differently positioned and combined apertures on the magnitudes of electric coupling coefficients of two identical combline resonators are analysed. Coupling coefficient, k-vertical symmetry provides greater negative coupling for apertures less than 50 % opening on the common wall. Combined apertures do not enhance electric coupling. The Γ aperture annihilates electric coupling, whereas T shaped aperture provides reduced negative coupling coefficients compared to single apertures that make up the combination.