Browsing School of Biological and Physical Science by Title
Now showing items 512-531 of 925
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Inventory, reward value and diversity of Apis mellifera nectariferous and polleniferous forage in Eastern Mau forest, Kenya
(2019)The study was conducted in Eastern Mau is one of the East Mau forest is an important watershed within the Mau Forest Complex, feeding major rivers and streams that make up the hydrological systems of Lake Victoria and ... -
Investigating the Young's modulus of Cu-Al-Be shape memory alloy using a phase diagram, vibration spectroscopy and ultrasonic waves
(Elsevier, 2024-03-05)This work presents a method for determining the effective Young’s modulus (Eeffective) and Poisson ratio of small specimens of a ternary shape memory alloy (SMA), Cu-Al-Be. The alloys were synthesized uniformly and ... -
Investigation of long acoustic waveguides for the very low frequency characterization of monolayer and stratified air-saturated poroelastic materials
(Elsevier, 2021)When sound propagates in a porous medium, it is attenuated via several energy loss mechanisms which are switched on or off as the excitation frequency varies. The classical way of measuring acoustic energy loss in porous ... -
An investigation of MHD Flows of Nanofluid over an oscillating surface with Joule Heating
(International Scientific Press, 2017)The present study aims at investigating unsteady hydromagnetic flow of viscous incompressible, conducting nanofluid over an infinite oscillating surface with Joule heating. The governing equations involved are transformed ... -
Investigation of the Effect of Film Thickness on the Optical Properties of Amorphous Se85-xTe15Sbx Thin Films
(Africa Journal of Physical Sciences, 2014)Amorphous thin films of Se85-xTe15Sbx (x = 0.0, 0.5, 2.5, and 5.0 at. %) deposited by flash evaporation technique, have been investigated in the wavelength range of 500nm-3000nm. It is found that the effect of increasing ... -
Investigation of the effect of film thickness on the optical properties of amorphous Se85-xte15sbx thin films
(Africa Journal of Physical Sciences, 2014)Amorphous thin films of Se85-xTe15Sbx (x = 0.0, 0.5, 2.5, and 5.0 at. %) deposited by flash evaporation technique, have been investigated in the wavelength range of 500nm-3000nm. It is found that the effect of increasing ... -
AN INVESTIGATION OF THE EFFECTS OF BOUNDARY LAYER THICKNESS ON A THIN FILM OF LIQUID FLOW DOWN AN INCLINED PLANE
(2012-12-30)The motion of fluid substances may be described by the Navier-Stokes (N-S) equations. The equations arise from the application of Newton’s second Law of motion to a fluid. In this paper, N-S equations in two dimensions ... -
An investigative study of dwarf mango (Boribo Muyini) seed kernel extract against inflammatory agent Staphylococcus aureus
(Journal of Scientific and Innovative Research, 2015)Alternative herbal medicine has been used to treat various infections from centuries. Natural plants contain Phyto constituents having similar chemical properties as of synthetic antibiotics. Boribo Muyini a typical Tanzanian ... -
Isolation and Characterisation of Ralstonia Solanacearum Strains of Tomato Wilt Disease from Maseno, Kenya
(Asian Economic and Social Society, 2017)Ralstonia solanacearum (E.F. Smith) Yabuuchi, is the cause of bacterial wilt of tomato and one of the most severe pathogens of solanaceous crops with a very wide host range. There is little information on R. solanacearum ... -
Isolation and Characterisation of Ralstonia Solanacearum Strains of Tomato Wilt Disease from Maseno, Kenya
(Asian Economic and Social Society, 2017)Ralstonia solanacearum (E.F. Smith) Yabuuchi, is the cause of bacterial wilt of tomato and one of the most severe pathogens of solanaceous crops with a very wide host range. There is little information on R. solanacearum ... -
Isolation and characterization of a toxic metal-tolerant Phenanthrene-degrader Sphingobium sp. in a two-liquid-phase partitioning bioreactor (TPPB)
(2013-10-01)A phenanthrene-degrading strain PHE3, identified as the genus of Sphingobium, was isolated using a two-liquid-phase partitioning bioreactor. More than 96% of the initial amount (up to 100 mg l− 1 silicone oil) of ... -
Isolation and chemical characterisation of pyrrolisidine alkaloids from some senecio
(University of Calgary, 1991) -
Isolation and detailed 1H and 13C NMR structural assignment for three trachylobanes from Psiadia punctulata (Asteraceae) grown in Africa
(Elsevier, 2022-04-01)The first isolation of a trachylobane from an African specimen of Psiadia punctulata (Asteraceae) is presented in this paper. A complete 1H and 13C NMR spectral analysis of this compound and two other trachylobane diterpenes, ... -
Isolation and Identification by Morphological and Biochemical Methods of Antibiotic Producing Microorganisms from the gut of Macrotermes michaelseni in Maseno, Kenya
(Journal of Applied Biology & Biotechnology, 2016-01)The major gut microflora colonizing the hind gut of higher termites, include morphologically diverse microorganisms. The objective of this study was to identify by morphological and biochemical methods of the antibiotic ... -
Isolation of a new β-carboline alkaloid from aerial parts of Triclisia sacleuxii and its antibacterial and cytotoxicity effects
(Taylor & Francis, 2017-03-04)A new β-carboline alkaloid named sacleuximine A (1) together with known compounds palmatine (2), isotetrandrine (3), trans-Nferuloyltyramine (4), trans-N-caffeoyltyramine (5), yangambin (6), syringaresinol (7), sesamin ... -
Isolation of a new β-carboline alkaloid from aerial parts of Triclisia sacleuxii and its antibacterial and cytotoxicity effects
(Natural Product Research, 2017-01-01)A new β-carboline alkaloid named sacleuximine A (1) together with known compounds palmatine (2), isotetrandrine (3), trans-Nferuloyltyramine (4), trans-N-caffeoyltyramine (5), yangambin (6), syringaresinol (7), sesamin ... -
Isolation of Salmonella and Shigella from fish harvested from the Winam Gulf of Lake Victoria, Kenya.
(University of Nairobi., 2009)Human infections caused by pathogens transmitted from fish are quite common. The aim of this study was to isolate enteric pathogenic bacteria from fish that might be transmitted to humans after the handling or consumption ... -
Isolation, characterization and biological activities of phytoconstituents from Lonchocarpus eriocalyx Harms leaves
(Islamic Azad University, Shahrood Branch Press, 2018-09-01)The plant species Lonchocarpus eriocalyx Harms (Fabaceae) is a deciduous slender tree or shrub which grows up to 15 m tall. It is an important medicinal plant in Kenya used to treat a wide range of ailments including eye ... -
Isolation, characterization and biological activity of organic extractives from Calodendrum capense (L.f.) Thunb.(Rutaceae)
(2018)A novel prenylfuroquinoline alkaloid capensenin (1), an alkaloid confusameline (2), two furanocoumarins psolaren (3) and bergapten (4), were isolated from hexane and dichloromethane crude extracts of stem bark, leaves ... -
Isozyme variation among Amaranthus cultivars.
(Discovery and Innovation, 1996)Electrophoretic variation of esterase (Est), peroxidase (Per), phosphoglucoisomerase [glucose-6-phosphate isomerase] (Pgi) and phosphoglucomutase (Pgm) was studied in seven Amaranthus populations, namely, Jumla, F1 Jumla, ...