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Now showing items 54-73 of 81

A quantum mechanical study of dopants in diamond

Lombardi, Enrico Bruno (2009-08-25)
Radionuclide liquid waste treatment of 68[superscript]Ge by graphene oxide based nanomaterials

Genu, Aurelia Khanyiswa (2019-06)

Radionuclide liquid wastes generated from nuclear facilities can affect humans and the environment, thus substantial attention for their safe management has been received worldwide. Treatment of radionuclide liquid wastes ...
Rare earth doped sodium aluminium silicate for optical cooling application

Kiteme, Kyalo Ngesu (2021-02)

In the present research we successfully synthesized NaAlSiO2 crystals and doped (co- doped) them with various concentrations of Er3+, and Yb3+ ions via a hydrothermal method to unveil their up-conversion absorption bands ...
Rear-earth ions doped mesoporous TiO2 nanostructures and the caffeine booster in MAPbl3 perovskite material

Tsotetsi, Dieketseng Glara (2023-05)

Titanium dioxide (TiO2) nanostructures were synthesized by sol-gel method and co polymers polyethylene glycol (PEG), polyvinylpyrrolidone (PVP) and pluronic F127 were used as pore forming agents. The samples were then ...
Regulation of kinases by synthetic imidazoles, nucleotides and their deuterated analogues

Nkosi, Thokozani Clement (2015-02)

Deuteration is the replacement of a hydrogen atom by deuterium atom in a molecule. The replacement begins at the most acidic hydrogen in the molecule. In ATP, the deshielded hydrogen is C8-H which is the first replaced ...
The role of mathematics in first year students’ understanding of electricity problems in physics

Koontse, Reuben Double (2015-04)

Mathematics plays a pertinent role in physics. Students' understanding of this role has significant implications in their understanding of physics. Studies have shown that some students prefer the use of mathematics in ...
The role of three-body forces in few-body systems

Masita, Dithlase Frans (2006-11-30)

Bound state systems consisting of three nonrelativistic particles are numerically studied. Calculations are performed employing two-body and three-body forces as input in the Hamiltonian in order to study the role or ...
The search for a dark vector boson and a new scalar with the ATLAS detector

Boye, Diallo (2020-06)

Hidden sector or dark sector states appear in many extensions to the Standard Model (SM), to provide particle mediators for dark matter in the universe or to explain astrophysical observations such as the positron excess ...
Shock Excited 1720 MHz Masers

De Witt, Aletha (2009-08-25)

1720 MHz OH masers have been detected towards a number of supernova remnants (SNRs) at the shock interface where the SNR slams into the interstellar medium. Models indicate that these masers are shock excited and can only ...
Solving differential aquations in quantum mechanics using sinc functions in one and two dimensions, employing Python and Numpy

Ezenwachukwu, Obiageli Lovenda (2021-10-07)

In this contribution the sinc basis functions are used to numerically solve the Schrödinger equation in one and two dimensions for a number of potentials. The calculations are done using the Python and Numpy modules. ...
Structural and luminescence properties of NaYF4:Yb3+/Er3+ and NaGdF4:Yb3+/Nd3+ nanocrystals for possible application in photovoltaic solar cells

Thokwane, Pebetsi (2023-04)

NaYF4:Yb3+/Er3+ and NaGdF4:Yb3+/Nd3+ nanocrystals were prepared using a solution combustion (SC) method and their properties were evaluated for potential use as photon harvesters in photovoltaic solar cells (PSCs). The ...
Structure and agency in community media: a comparative case study of Alex news and Greater Alex today

Moyo, Charity Ntokozo (2020-11)

The objective of this study was to investigate whether community print media is fulfilling its developmental mandate in society using a comparative study of Alex News and Greater Alex Today community newspapers. This study ...
Structure and spin dynamics in Cr Doped ZnO

Amami, Paul Erhire (2016-06)

Polycrystalline Zn1-xCrxO (0.01 ≤ x ≤ 0.09) samples synthesized by solid state reaction technique were sintered at different temperatures following slow step sintering schedule. Structural, micro-structural, optical, ...
Structure of hypernuclei studied with the integrodifferential equations approach

Nkuna, John Solly (2012-06)

A two-dimensional integrodi erential equation resulting from the use of potential harmonics expansion in the many-body Schr odinger equation is used to study ground-state properties of selected few-body nuclear systems. ...
Study of Structural and Optical Properties of Undoped and Rare Earth Doped TiO2 Nanostructures

Talane, Tsholo Ernest (2017)

Un-doped, Er3+ doped (TiO2:Er3+) as well as Er3+/Yb3+ co-doped (TiO2:Er3+/Yb3+) nanocrystals with different concentrations of RE3+ (Er3+, Yb3+) were successfully synthesized using the sol-gel method. The powder X-ray ...
Synthesis and characterisation of up-scalable layered double hydroxides for energy storage application

Nyongombe Ekambo Gayi (2019-10)

The development of cost-effective and scalable synthetic methods is of paramount importance to achieve industrial application of energy conversion and storage devices based on layered double hydroxides (LDH). Herein, ...
Synthesis and characterization of long persistent phosphors using combustion method

Colen, Manaka Mmakgabo (2015)

In this work, alkaline earth aluminate phosphors doped with rare-earth ions and manganese were synthesized using combustion method. Several characterization techniques were used to study the structural and luminescent ...
Synthesis of platinum group metals nanoparticles by gamma radiolysis

Cele, Takalani (2018-06)

An environmental friendly and simple approach to synthesis of Platinum (Pt), Palladium (Pd), Rhodium (Rh) and Osmium (Os) nanoparticles via gamma radiolysis is demonstrated. Herein, we report on the effect of gamma rays ...
Synthesis of Polyaryl-substituted Bisquinazolinones with potential photophysical properties

Mmonwa, Mmakwena Modlicious (2014-11)

3,5-Dibromo-2-aminobenzamide was reacted with 1,3-cyclohexanedione derivatives in the presence of iodine as catalyst in toluene under reflux to afford novel 6,8-dibromo-2-[3-(2´-alkyl-1´,2´,3´,4´-tetrahydro-6´,8´-dibromo ...
Synthesis of TiO2 nanoparticles by spray-lyophilization process : characterization and optimization of properties of photocatalytic water purification and gas sensing applications

Kibasomba, Pierre Mwindo (2021-03-28)

Monodisperse titanium dioxide (TiO2) nanoparticles were synthesized by a novel freeze-drying process herein called lyophilization. The process of lyophilization is described in detail. The materials were characterized by ...

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