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Now showing items 1101-1110 of 1144
A new β-hydroxydihydrochalcone from Tephrosia uniflora, and the revision of three β-hydroxydihydrochalcones to flavanones
(University of Nairobi, 2022-04)
The CH2Cl2/MeOH (1:1) extract of the stems of Tephrosia uniflora yielded the new β-hydroxydihydrochalcone (S)-elatadihydrochalcone-2'-methyl ether (1) along with the three known compounds elongatin (2), (S)-elatadihydrochalcone ...
Acaricide resistance in livestock ticks infesting cattle in Africa: Current status and potential mitigation strategies
(University of Nairobi, 2022-05)
In many African countries, tick control has recently been the responsibility of resource-poor farmers rather than central government veterinary departments. This has led to an increase in acaricide resistance, threatening ...
Sensitivity Analysis of a Transmission Interruption Model for the Soil-Transmitted Helminth Infections in Kenya
(University of Nairobi, 2022-03)
As the world rallies toward the endgame of soil-transmitted helminths (STH) elimination by the year 2030, there is a need for efficient and robust mathematical models that would enable STH programme managers to target the ...
Antibacterial Activities and Phytochemical Screening of Crude Extracts from Kenyan Macaranga Species Towards MDR Phenotypes Expressing Effux Pumps
(University of Nairobi, 2021)
Macaranga species are traditionally used for the
treatment and management of coughing, fungal infection, and wounds.
In this study, the phytochemical screening and antibacterial activities
of nine crude extracts from ...
Mechanism of Action of Endophytic Fungi Hypocrea Lixii and Beauveria Bassiana in Phaseolus Vulgaris as Biopesticides Against Pea Leafminer and Fall Armyworm
(University of Nairobi, 2021-09)
Endophytic fungal isolates Hypocrea lixii F3ST1 and Beauveria bassiana G1LU3 were evalu-
ated for their potential to endophytically colonize and induce active compounds in Phaseolus vulgaris,
as a defense mechanism against ...
Antibacterial Secondary Metabolites From Vernonia Auriculifera Hiern (Asteraceae) Against Mdr Phenotypes
(University of Nairobi, 2022)
Purification of the aerial parts of Vernonia auriculifera Hiern
afforded steroids (1–2), flavonoids (3–5), and polyalcohol (6).
Their structures were determined using spectral evidences as well
as by comparison with ...
Atmospheric Controls on Precipitation Isotopes and Hydroclimate in High-elevation Regions in Eastern Africa Since the Last Glacial Maximum
(University of Nairobi, 2021)
Tropical Africa experienced large changes in hydroclimatic conditions since the Last Glacial Maximum
(LGM), ∼26.5 to 19 thousand years (ka or kyr) ago. The hydrogen isotopic composition of fossil leaf
waxes (δD wax ), ...
Integrating Stakeholder Preferences Into Ecosystem Services Mapping in Yala Wetland, Kenya
(University of Nairobi, 2022)
Wetlands such as the Yala swamp in Kenya are among the most important and increasingly
threatened ecosystems globally due to their ecological significance and complexity, and the
importance of the ecosystem services (ES) ...
Earth’s Sediment Cycle During the Anthropocene
(University of Nairobi, 2022)
The global sediment cycle is a fundamental feature of the Earth system, balancing
competing factors such as orogeny, physical–chemical erosion and human action. In this Review,
values of the magnitudes of several sources ...
Membrane Permeabilization and Antimicrobial Activity of Recombinant Defensin-d2 and Actifensin Against Multidrug-resistant Pseudomonas Aeruginosa and Candida Albicans
(University of Nairobi, 2022)
Antimicrobial resistance requires urgent efforts towards the discovery of active antimicrobials, and the development of strategies to sustainably produce them. Defensin and defensin-like antimicrobial peptides (AMPs) are ...