College of Natural Sciences (CoNAS): Recent submissions
Now showing items 181-200 of 349
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General large deviations of longest gaps in homogeneous Poisson processes
(Elsevier, 2020)Let (N(t))t≥0 be a homogeneous Poisson process with unit intensity. The longest gap L(t)of this process is the maximal time subinterval between epochs of arrival times up to time t, and it finds applications in the theory ... -
Limiting behaviours of the longest gaps between occurrence epochs in poisson processes
(Makerere University, 2022-02)This study concerns the limiting behaviours of the longest gap, between epochs in Poisson processes up to time t using large deviation theory. This theory is an area of probability theory which provides tools for studying ... -
Effect of changing temperature on the metabolic performance and life history of Nile Tilapia - Oreochromis Niloticus (Linnaeus, 1758)
(Makerere University, 2021-11)Tropical fresh water fishes are believed to be vulnerable to the impacts of climate warming on the basis of their physiological history, that is having a narrow thermal window and a low acclimation capacity. In this study, ... -
Flattened partitions: pattern avoidance and behavior of permutation statistics
(Makerere University, 2021-11-10)The study of permutations, and specifically flattened partitions is an active area of current research. We provide a new combinatorial interpretation to the sequence A124324 in the On-line Encyclopedia of Integer Sequences ... -
Genetic profiles of single nucleotide polymorphisms in alcohol metabolizing enzymes in the Ugandan population
(Makerere University, 2022-02)The pathway for alcohol (ethanol) metabolism in the body is catalyzed by alcohol dehydrogenase enzymes (ADHs), catalase (CAT) and CYP2E1 to generate acetaldehyde, which is metabolized by aldehyde dehydrogenase enzymes ... -
Nitrosoamines and narcotic drugs in smokeless tobacco products sold on Kampala City markets
(Makerere University, 2018-08)The consumption of smokeless tobacco products in Uganda has increased due to unregulated sale and easy of accessibility by the youth. It is usually characteristic of consumers of smokeless Tobacco products to behave ... -
Evaluating the shielding properties of selected building materials used in Kampala, Uganda for gamma radiation
(Makerere University, 2021-04)Humans are continuously exposed to ionizing radiation. For high ionizing radiation levels, shielding is needed to mitigate unwanted exposure. In this study, Shielding properties of selected local building materials used ... -
Incidence of mycotoxin producing fungi and aflatoxins in maize grains and flour in Arua District.
(Makerere University, 2022-02-04)The maize value chain in Uganda lacks mechanisms that ensure grain and flour quality and safety. The objective of this study was to assess the safety of maize and maize flour produced in Arua district with respect to fungal ... -
Hierarchical models and spatio-temporal processes in data analysis
(Makerere University, 2021-12)Spatio-temporal processes evolve in space and time. As a consequence data from such processes, usually possess both temporal and spatial dependence which have to be reflected by fitted stochastic models. The existing ... -
Measurement and modeling of residual stress in porcelain tiles formulated from different quartz particle sizes in Uganda
(Makerere University, 2021-06)Quartz plays a significant role in physicomechanical properties of tiles, because it is the most abundant crystalline phase present in a fired product. The use of quartz particle size that exceeds 32 µm can be detrimental ... -
Modeling precipitable water vapour using Global Navigation Satellite System data over the East African region
(Makerere University, 2021-11)The Global Navigation Satellite System (GNSS) can be used to derive accurately the Zenith Tropospheric Delay (ZTD) and Precipitable Water Vapour (PWV) under all-weather conditions. The derived ZTD and PWV values play a ... -
Human-based parasites and enterobacteria carried by cockroaches (ORDER: BLATTODEA) in households of Wakiso District, Uganda
(Makerere University, 2021-05-07)Cockroaches are insects, with both structural and behavioural adaptations including chewing mouth parts, brown to black colouration, nocturnal habit, high reproductive potential and occupation of insanitary habitats. These ... -
Diversity and distribution of aerial parasitic plants on woody plants in home gardens of selected districts of Western Uganda.
(Makerere University, 2021-03)Parasitic plants, through a range of infestation strategies, attack and destroy crop plants and therefore require management. In Uganda, the vulnerability of crop plants as hosts to parasitic plants has not been much ... -
Earthworms as alternative protein ingredient in poultry feed.
(Makerere University, 2018-03-01)In poultry feed accounts for 70% of the total cost of production hence there is a need to have a high-quality and yet low cost feed. The protein sources used in poultry feeds (Rastrineobola argentea & soy beans) are also ... -
Primary validation of Charm II tests for the detection of antimicrobial residues in a range of aquaculture fish
(Springer Nature, 2020)The study carried out a primary validation of Charm II tests for the detection of antimicrobial residues in aquaculture fish. The validation was performed according to European Commission Decision 2002/657/EC and the ... -
Synthesis and characterization of graphene oxide from locally mined graphite flakes and its supercapacitor applications
(Elsevier, 2020)Graphite is a mineral mined from different parts of the world which including Africa. It can be used or converted into different carbon materials such as exfoliated graphite, graphene, Graphene Oxide (GO), graphene nano ... -
Synthesis of cyclic carbonates from epoxides and carbon dioxide catalyzed by talc and other phyllosilicates
(Springer Nature, 2020)Naturally occurring phyllosilicate minerals such as talc and vermiculite in conjunction with n-tetra butyl ammonium bromide (TBAB) co-catalyst were found to be efficient in the coupling of CO2 with epoxides to form cyclic ... -
Organochlorine pesticide residues in Uganda’s honey as a bioindicator of environmental contamination and reproductive health implications to consumers
(Elsevier, 2021)Honey has multifaceted nutritional and medicinal values; however, its quality is hinged on the floral origin of the nectar. Taking advantage of the large areas that they cover; honeybees are often used as bioindicators of ... -
Selective oxidation of benzyl alcohols with molecular oxygen as the oxidant using Ag-Cu catalysts supported on polyoxometalates
(Elsevier, 2021)We report an efficient process for the oxidation of benzyl alcohols using molecular oxygen as the oxidant catalyzed by Ag-Cu catalysts supported on polyoxometalates (Ag-Cu/POM). The Ag-Cu/POM catalyst was prepared by ... -
Evaluation of diploid banana genotypes for resistance to weevils (Cosmopolites sordidus) in Uganda
(2021)Banana production in Uganda, has for decades been constrained by a number of abiotic and biotic factors. Weevils are among major pests that frustrate production causing over 60% yield loses. Cultural, biological and chemical ...