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Ab Initio Study of K3Cu3P2 Material for Photovoltaic Applications

Mbilo, Mwende; Manyali, George S.; Musembi, Robinson J. (PASET, 2022-03-25)

Search for e cient materials for application in the elds of optoelectronics and photovoltaics are active areas of research across the world. The potential of compounds such as K3Cu3P2 is not yet fully realized. Therefore, ...
Ab initio study on Quasi-Binary Acetonitriletriide Sr3[C2N]2

Sifuna, James; . Manyali, George S; Wabululu, Elicah; Songa, Carolyne; Otieno, Alloysious; Sironik, Stephen (2020-01-07)

We report using density functional theory (DFT), the ground-state properties of the recently synthesized and characterized Sr3[C2N]2 crystal. The nearly colorless, centrosymmetric Sr3[C2N]2 crystallizes in a monoclinic ...
Adsorption-desorption and leaching behavior of diuron on selected Kenyan agricultural soils

Shikuku, Victor Odhiambo; Muendo, Boniface M.; Getenga, Zachary M.; Lalah, Joseph O.; Wandiga, Shem O.; Rothballer, Michael (Kenya Bureau of Standards, 2021)

In this work, the adsorption-desorption dynamics of diuron in three typical Kenyan agricultural soils, Nzoia (NZ), Thika (TH) and Machakos (MK) was investigated. The equilibrium adsorption data, tested against three ...
Comparison of band-ﬁtting and Wannier-based model construction for WSe2

Sifuna, James; Garc´ıa-Ferna´ndez, Pablo; Manyali, George S.; Amolo, George; Junquera, Javier (2020-01-17)

Transition metal dichalcogenide materials MX2(M = Mo, W;X = S,Se) are being thoroughly studied due to their novel two-dimensional structure, that is associated with exceptional optical and transport properties. From a ...
Density Dependent Delayed Migration forRosenzweig-Macaurther Model with Holling Type IIPredator Functional Response

Apima, Samuel B.; Lawi, George O.; Kagendo, Nthiiri J (Asian Research Journal of Mathematics, 2019-12-01)

The model describing the interaction between the predator and prey species is referred to as a predator-prey model. The migration of these species from one patch to another may not be instantaneous. This may be due to ...
Detection of Plasmodium Sporozoites and Blood-Meal Source in a Population of Anopheles Coustani Senso Lato in Kakamega County, Western Kenya

Busula, Annette O; Ayuya, Stephen; Kitungulu, Nicholas; Kipchoo, Mukabane; Webale, Mark Kilongosi; Omukunda, Elizabeth (ijird, 2022-01)

Re-emerging of malaria vectors in the highlands of Western Kenya pose a challenge to malaria eradication efforts. Anopheles coustanis.l is a sub-Saharan mosquito species implicated in transmission of malaria in many parts ...
DFT investigation of structural, elastic, electronic, thermodynamic and optical properties of KCuZ (Z= Te, Se) solar absorbers

Madallah, Yusuf; Felix, O. Saouma; George, S. Manyali; Job, W. Wafula; Odanga, Huxley (Solid State Communications, 2023)

In this study, we have investigated the electronic , structural, elastic, optical and thermodynamic properties of the copper-based ternary semiconductors, that is, KCuZ (Z= Te, Se). The properties of these materials have ...
A DFT study of mechanical properties of hcp rhenium

Manyali, George S. (2021-10-23)

In the present paper, hcp Re was investigated in terms of its structural, elastic, mechanical and thermodynamic properties using density-functional theory (DFT). The local density approximation was employed for the exchange ...
Does artemether–lumefantrine administration affect mosquito olfactory behaviour and fitness?

Busula1, Annette3,4; Berge1, Jet ten; van Dijk1, Tessa S; Takken1, Willem; De de Boer1, Jetske G2* (Netherlands Institute of Ecology, 2019)

Artemisinin-based combination therapy (ACT) is the recommended treatment against uncomplicated Plasmodium falciparum infections, and ACT is widely used. It has been shown that gametocytes may be present after ACT and ...
Efficient Removal of Sulfamethoxazole onto Sugarcane Bagasse-derived Biochar: Two and Three-parameter Isotherms, Kinetics and Thermodynamics

Shikuku, Victor Odhiambo; Kimosop, Selly Jemutai (South African Chemical Institute, 2020-03-20)

In this work, bagasse, an agricultural waste was used for the development of environmentally benign biochar (CBG) and the thermal pyrolysis product applied for adsorption of sulfamethoxazole (SMX) from water using a batch ...
Efficient Removal of Sulfamethoxazole onto Sugarcane Bagasse-derived Biochar: Two and Three-parameter Isotherms, Kinetics and Thermodynamics

Shikuku, Victor Odhiambo; Kimosop, Selly Jemutai (South Africa Chemical Institute, 2020-08)

In this work, bagasse, an agricultural waste was used for the development of environmentally benign biochar (CBG) and the thermal pyrolysis product applied for adsorption of sulfamethoxazole (SMX) from water using a batch ...
Elastic behavior, pressure-induced doping and superconducting transition temperature of GdBa2Cu3O7−x

Agora, JaredO; Otieno, Calford; Nyawere, PhilipWO; Manyali, George S (IOP, 2022-01-13)

Doping superconductors are known to vary the superconducting transition temperature TC depending on the degree of holes or electrons introduced in a system. In this study, we report how pressure-induced hole doping ...
Enhanced hexazinone degradation by a Bacillus species and Staphylococcus species isolated from pineapple and sugarcane cultivated soils in Kenya

Muendo, Boniface Mbithi; Shikuku, Victor Odhiambo; Getenga, Zachary Moranga; Lalah, Joseph Owuor; Wandiga, Shem Oyoo; Karau, Geoffrey Muriira; Rothballerf, Michael (KeAi, 2022-02-12)

In this work, hexazinone-degrading bacterial strains from Kenyan tropical soils with long termapplication history were isolated and identified. Non-sterile soils from sugarcane and pineapple cultivated fields with over 15 ...
Enhanced Performance of Hydrogen Peroxide Modified pozzolan-based Geopolymer for Abatement of Methylene blue from Aqueous Medium

Shikuku, Victor Odhiambo; Hermann, Dzoujo Tamaguelon; Sylvain, Tome; Tchuigwa, Jean T; Spieß, Alex; Janiak, Christoph; Etoh, Marie Annie; Dina, David (2021)

Pozzolan-based eco-adsorbents were synthesized by geopolymerization with addition of hydrogen peroxide (H2O2) with mass ratios 0% (GP0) and 1% (GP1) and the products used to sorb cationic methylene blue (MB) dye from ...
THE ENTOMOPATHOGENIC FUNGI FOR MALARIA VECTOR CONTROL

BUSULA, ANNETTE (International Journal of Contemporary Applied Researches, 2018-10-10)

Malaria is a global health problem and its burden is high in the sub-Saharan countries. The mainstay control of malaria is by use of chemical insecticides against malaria mosquitoes. However, resistance to pyrethroids has ...
First-principles study of two-dimensional electron and hole gases at the head-to-head and tail-to-tail 180◦ domain walls in PbTiO3 ferroelectric thin ﬁlms

Sifuna, James; -Ferna´ndez, Pablo Garc´ıa; Manyali, George S.; George, Amolo; Junquera, Javier (African school for Electronic Structure Methods and Applications (ASESMA), 2020-04-07)

We study from ﬁrst-principles the structural and electronic properties of head-to-head (HH) and tail-to-tail (TT) 180◦ domain walls in isolated free-standing PbTiO3 slabs. For suﬃciently thick domains (n = 16 unit cells ...
FT investigation of structural, elastic, electronic, thermodynamic and optical properties of KCuZ (Z= Te, Se) solar absorbers

Yusuf, Madallah; saouma, Felix O.; Manyali, George S.; WAFULA, Job W.; Huxley, Odanga (2022-09)

In this study, we have investigated the electronic , structural, elastic, optical and thermodynamic properties of the copper-based ternary semiconductors, that is, KCuZ (Z= Te, Se). The properties of these materials have ...
Insights on adsorption of carbamazepine onto iron oxide modified diatomaceous earth: Kinetics, isotherms, thermodynamics, and mechanisms

Kimosop, Selly Jemutai; Orata, Francis; Shikuku, Victor O.; Okello, Veronica A.; Getenga, Zachary M. (Environmental Research, 2020)

To ameliorate adsorbent recovery by an external magnetic field, naturally occurring diatomaceous earth (DE) was modified with iron-oxide, characterized and applied for adsorption of carbamazepine (CBZ) from synthetic ...
Low Born e ective Charges, High Covalency and Strong Optical Activity in X2+ 3 Bi3􀀀��N3􀀀�� (X=Ca,Sr,Ba) inverse-perovskites

Wakini, Jasmine; Songa, Carolyne; Chege, Stephen; Saouma, Felix O.; Wabululu, Elica; Nyawere, P.W.O; Odari, Victor; Sifuna, James; . Manyali, George S (2022-03-02)

We compute for the rst time a complete charge analysis (Bader and Born e ective) on X2+ 3 Bi3􀀀N3􀀀 (X=Ca,Sr,Ba). The crystals show a great electron sharing with little possibility of ferroelectricity. Inverse perovskites ...
Low Born e ective Charges, High Covalency and Strong Optical Activity in X2+ 3 Bi3􀀀��N3􀀀�� (X=Ca,Sr,Ba) inverse-perovskites

Wakini, Jasmine; Songa, Carolyne; Chege, Stephen; .Saouma, Felix O; Wabululu, Elica; Nyawere, P.W.O; Odari, Victor; Sifuna, James; Manyali, George S. (2022-03)

We compute for the rst time a complete charge analysis (Bader and Born e ective) on X2+ 3 Bi3􀀀N3􀀀 (X=Ca,Sr,Ba). The crystals show a great electron sharing with little possibility of ferroelectricity. Inverse perovskites ...

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