Faculty of Science & Technology (FST): Recent submissions
Now showing items 61-80 of 4283
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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 ... -
Flavanols from Tetrapleura tetraptera with cytotoxic activities
(University of Nairobi, 2022-05)Tetrapleura tetraptera is a medicinal plant used in East and West Africa to treat inflammation and related diseases. From the stem bark of the plant, three previously undescribed flavan-3-ol derivatives named (2R,3S)-3,3 ... -
Dietary preference of cheetahs ( Acinonyx jubatus) in south-eastern Kenya
(University of Nairobi, 2022-03)The conversion of natural ecosystems due to anthropogenic activities has led to the destruction of natural habitats and to the deterioration of habitat quality. Top predators particularly respond sensitively to changes in ... -
Influence of Perception and Quality of ICT‐Based Agricultural Input Information on Use of ICTs by Farmers in Developing Countries: Case of Sikasso in Mali
(University of Nairobi, 2017)Small-scale cereal farmers dominate agricultural activities in developing countries. These agricultural activities are characterized by low productivity due to lack of agricultural input information. ... -
Partial least square structural equation modelling’use in information systems: an updated guideline in exploratory settings.
(University of Nairobi, 2018)The purpose of many studies in the field of Information Systems (IS) research is to analyse causal relationship between variables. Structural Equation Modelling (SEM) is a statistical technique ... -
Status of e-learning Quality in Kenya: Case of Jomo Kenyatta University of Agriculture and Technology Postgraduate Students
(University of Nairobi, 2018-02)There is a substantial increase in the use of learning management systems (LMSs) to support e-learning in higher education institutions, particularly in developing countries. This has been done with some measures of success ... -
Factors affecting asynchronous e-learning quality in developing countries university settings
(University of Nairobi, 2018-04)Despite the potential of Learning Management System (LMS) supported asynchronous e-learning to improve asynchronous e-learning system quality by enhancing learning effectiveness and academic achievement of HEIs , several ... -
University Students’ Perception on the Usefulness of Learning Management System Features in Promoting Self-Regulated Learning in Online Learning
(University of Nairobi, 2021)Online learning has increasingly been adopted by most institutions of higher learning to facilitate teaching and learning as a continuum to the traditional face-to-face approach. Most of these institutions ... -
A Conceptual Educational Data Mining Model for Supporting Self-Regulated Learning in Online Learning Environments
(University of Nairobi, 2021)Self-regulated learning is attracting tremendous researches from various communities such as information communication technology. Recent studies have greatly contributed to the domain knowledge that the use self-regulatory ... -
Strategies for Managing Cognitive Load and Enhancing Motivation in E-Learning
(University of Nairobi, 2021)Cognitive load and motivation are two factors that have been established as mediators of learning. It has been established that learners who experience low cognitive loads and are highly motivated to succeed in learning. ... -
A Systematic Review of Gamification Within E-Learning
(University of Nairobi, 2021)The focus of this study was to review and evaluate the effectiveness of gamification within e-learning platforms. The study deployed systematic literature review methodology to evaluate how effective gamification has been ... -
The Role of Indigenous Knowledge on Use and Conservation of Wild Medicinal Food Plants in Loita Sub-county, Narok County
(University of Nairobi, 2018)Aims: To evaluate the role of indigenous knowledge in the use and conservation of wild medicinal food plants in Loita sub-county, Narok County. Study Design: Stratified random sampling was used to select respondents. Place ... -
Morphological Traits as Indicators of Bitterness in Traditional Vegetables: The Case of Spider Plant (Gynandropsis gynandra) in Kenya
(University of Nairobi, 2019)Aims: The study set out to find the existence of variation in leaf bitterness of spider plant (Gynandropsis gynandra) in six (6) agro-ecological zones in Kenya and whether levels of leaf bitterness correlated with morphological ... -
Heterologous expression of the benzoate para-hydroxylase encoding gene (CYP53B1) from Rhodotorula minuta by Yarrowia lipolytic
(University of Nairobi, 2006)There is currently an increasing number of cytochrome P450 (CYP450) monooxygenase encoding genes becoming available from various genome-sequencing projects. These enzymes require association with cytochrome P450 reductase ... -
Antimicrobial Usage and Detection of Multidrug-Resistant , Including Methicillin-Resistant Strains in Raw Milk of Livestock from Northern Kenya
(University of Nairobi, 2021)The association of antimicrobial usage (AMU) with prevalence of antimicrobial-resistant (AMR) Staphylococcus aureus, including methicillin-resistant S. aureus (MRSA) in livestock raw milk consumed by pastoralists in Kenya ... -
On unitary equivalence of some classes of operators in Hilbert spaces
(University of Nairobi, 2020)Abstract It is a well-known result in op erator theory that whenever two op erators are similar then they have equal sp ectra even though they do not have to belong to the same class of op erators. However ... -
Further remarks on unitary equivalence of some classes of operators in Hilbert spaces
(University of Nairobi, 2020)n this paper we investigate results on unitary equivalence of operators that include n-binormal, skew binormal and n-power-hyponormal operators acting on complex Hilbert space H. AMS subject classification ... -
Handling missing data in a composite outcome with partially observed components: simulation study based on clustered paediatric routine data
(University of Nairobi, 2021)Composite scores are useful in providing insights and trends about complex and multidimensional quality of care processes. However, missing data in subcomponents may hinder the overall reliability of a composite measure. ... -
In silico structural and functional prediction of African swine fever virus protein-B263R reveals features of a TATA-binding protein
(University of Nairobi, 2018)African swine fever virus (ASFV) is the etiological agent of ASF, a fatal hemorrhagic fever that affects domestic pigs. There is currently no vaccine against ASFV, making it a significant threat to the pork industry. The ... -
Phytochemical Analysis and Establishment of Embryogenic Cell Suspension and Agrobacterium-mediated Transformation for Farmer Preferred Cultivars of West African Plantain (Musa spp.)
(University of Nairobi, 2020)Banana and plantain are among the foremost staple food crops providing food and livelihood to over 500 million people in tropical countries. Despite the importance, their production is hampered due to several biotic and ...