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Chemical Analysis, Antibacterial Activities And Uses Of Leaves And Calyces Of Hibiscus Sabdariffa Grown In Dodoma, Tanzania, Sartaz Begum, Derick R. Mwakimbwala, Gideon Sangiwa, Valence M.K. Ndesendo

Tanzania Journal of Science

Preliminary phytochemical screening of aqueous and ethanolic extracts of Hibiscus sabdariffa grown in Tanzania revealed the presence of secondary metabolites like steroids, tannins, saponins, glycosides, terpenoids, flavonoids along with L-ascorbic acid (vitamin C) and iron(II). Furthermore, both leaves and calyces showed antibacterial activities (agar well diffusion method) against selected bacterial species (Escherichia coli, Staphylococcus aureus, Salmonella typhi and Shigella sonnei), but calyces possessed potent antibacterial activities compared to leaves. The results also supported the claimed traditional uses of this plant. When interrogated during the cross-sectional study in Dodoma region, 54% of the respondents claimed the plant is used to treat …

Enhancing Germination Of Seeds Of A Multipurpose Tree Species Combretum Molle, Samora Macrice Andrew

Tanzania Journal of Science

Combretum molle R. Br. ex G. Don (Combretaceae) is a highly valued indigenous multipurpose tree species that has gained considerable attention in recent times due to its importance as a medicinal plant as well as an alternative species for wood and charcoal production. However, we lack adequate information on simple and appropriate methods that could be used to break its distinct seed dormancy to support domestication of wild populations apparently undergoing over exploitation and the negative impacts of deforestation. Eight pre-treatment methods involving complete removal of wing, complete removal of mesocarp, overnight soaking in cold water (24 °C) and partial …

Constraining The Origin And Age Of The Thermal And Cold Water In The Lake Natron Basin, Northern Tanzania, Edista A. Abdallah, Charles H. Kasanzu, Crispin P. Kinabo, Akira Imai, Mike J. Butler

Tanzania Journal of Science

Springs on the eastern and western shores of Lake Natron Basin (LNB), located within the eastern branch of the East Africa Rift System (EARS) in Northern Tanzania had a discharge temperature that ranged between 34.0 °C and 51.2 °C, while the pH varied from 8.0 to 10.7. The electrical conductivity (EC) ranged between 5,007 µS/cm and 49,200 µS/cm. Cold waters had a temperature of 31.9 °C to 32.5 °C, while the pH ranged between 8.0 and 8.3, and the EC ranged between 1,401 µS/cm and 3,806 µS/cm. The stable isotope composition varied between -2.4 ‰ and -5.3 ‰ for δ18O, …

Spatiotemporal Variability Of Drought And Its Relationships To Enso And Iod Indices In Somaliland, Mohamed S Bile, Paul Ts Limbu

Tanzania Journal of Science

Drought is one of Somaliland’s most prevalent natural hazards, causing serious socioeconomic and environmental harm. This study investigated the spatial and temporal variability of drought and its relationships with El Niño Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) indices using the Standardized Evapotranspiration Index (SPEI) from 1981 to 2020. The Mann-Kendall trend test and Sen's slope estimator were used to assess the trends of annual and seasonal SPEI time series. The Empirical Orthogonal Function (EOF) was employed to examine the dominant modes of the SPEI series, and Pearson and partial correlation analyses were performed to investigate the associations between …

Oral Impacts On Daily Performances Among People Living With Human Immunodeficiency Virus On Haart Era Attending Care And Treatment Clinics In Dar Es Salaam, Tanzania, Leonard Evarist, Irene Kida Minja

Tanzania Journal of Science

Oral disease/conditions are reported to have negative effects on the quality of life of People Living with Human Immunodeficiency Virus/Acquired Immune Deficiency Syndrome (PLWHIV/AIDS). This study aimed to assess the prevalence and causes of oral impacts on daily performances (OIDP) and its associated factors among PLWHIV/AIDS. A cross-sectional study was conducted among 218 PLWHIV/AIDS attending two HIV Care and Treatment Centres (CTCs) in Dar es Salaam. The study utilized a structured interview schedule containing questions on socio-demography and a single item of global oral health measure on the perception of current oral health status (OHS). A Swahili version of an …

Antibacterial Potency Of Allium Sativum, Psidium Guajava, Zingiber Officinale Roots Against The Food Poisoning Strains (Escherichia Coli 0157:H7 And Staphylococcus Aureus), Godfrey O. Mauti

Tanzania Journal of Science

Escherichia coli 0157:H7 and Staphylococcus aureus are notorious food poisoning bacteria of great effect on human health. This study determined the phytochemical constituents of ethanolic, vacuum liquid chromatography (VLC) filtrates of Allium sativum (garlic), Psidium guajava (guava), Zingiber officinale (ginger) and their antibacterial activities on E. coli 0157:H7 and S. aureus. In a laboratory-based controlled experiment, the antibacterial and inhibitory activities of the VLC filtrates in doses of 0.01, 0.02, 0.04, and 0.08g/mL were investigated on E. coli 0157:H7 and S. aureus using the agar well diffusion method and compared with a standard antibiotic. The indices of the zone of …

Phytochemical Constituents, Haematological Activities And Gc-Ms Analysis Of Isolated Oil Of Rosary Pea (Abrus Precatorius) In Wistar Rat Fed With High Lipid Diet, Osaro Iyekowa, Opara V Ndubuisi

Tanzania Journal of Science

The study is aimed at investigating the phytochemical constituents and haematological activities of the isolated oil in Wistar rat fed with high lipid diet. Powdered leaves of Abrus precatorious were extracted and phytochemical screening was done according to prescribed standard methods, while vacuum liquid chromatography (VLC) was adopted for oil isolation of the crude extract and characterized by gas chromatography-mass spectrometry (GC-MS). Thirty adult Wistar rats were randomly arranged into six groups (A, B, C, D, E and F) and treated under certain conditions. Haematological analyses were performed according to standard procedures. Saponins, alkaloids, terpenoids, flavonoids and glycosides were present. …

Morphological Variabilities And Identification Of Yam (Dioscorea Spp.) Genotypes From Major Growing Regions In Tanzania, Joseph I Massawe, Gladness E Temu

Tanzania Journal of Science

Yam (Dioscorea spp.) is a vegetatively propagated crop that belongs to the family Dioscoreaceae. In Tanzania, yam is mainly grown as a source of food and income generation, especially for smallholder farmers. In this study, an assessment of morphological variations among 74 genotypes of Dioscorea spp. collected from six major growing regions was conducted. Yam genotypes were maintained and planted at Tanzania Agricultural Research Institute-Kibaha for characterization. Data from fifty morphological variables were subjected to multivariate analysis using principal component analysis and cluster analysis. The first nine principal components with Eigenvalues > 1 accounted for 86.28% of the total variations. Some …

Determination Of Sugars, Amino Acids, Ph And Alcohol In Bamboo Beverage From Southern Highlands, Tanzania, Lilian D Kaale

Tanzania Journal of Science

The amounts of sugars and amino acids play significant roles in defining the fermentation process and quantifying the alcohol levels in beverages, while pH affects the biological stability, colour, oxidation rate, and protein stability of alcoholic beverages. This study investigated the sugar content, amino acids, alcohol levels, and pH of bamboo beverage from Tanzania's southern highlands. During storage, the sugars significantly decreased (p < 0.05), especially when kept at room temperature from 52.96 to 0.00 (source 1), 53.35 to 0.00 (source 2) and 53.57 to 0.00 (source 3) g/L for fructose, from 47.93 to 14.78 (source 1), 47.23 to 14.91 (source 2) and 47.61 to 14.77 (source 3) g/L for glucose, and from 0.40 to 0.00 (source 1), 0.36 to 0.00 (source 2) and 0.37 to 0.00 (source 3) g/L for sucrose after six days of storage. A total of 15 amino acids were determined from the bamboo beverage with tyrosine being the most prevalent (597.68 mg/L for source 1, 599.44 mg/L for source 2 and 597.83 mg/L for source 3), followed by valine (261.13 mg/L for source 1, 261.24 mg/L for source 2 and 262.54 mg/L for source 3), threonine (76.69 mg/L for source 1, 76.91 mg/L for source 2 and 77.13 mg/L for source 3), and serine (66.37 mg/L for source 1, 67.23 mg/L for source 2 and 66.68 mg/L for source 3). After six days of storage at room temperature, there was a significant decrease in pH from 4.04 to 3.63. Alcohol content ranged from 3.11 to 9.05% v/v at the room temperature storage. These results might facilitate the optimal use of bamboo beverages, which have been neglected due to lack of scientific information such as amino acid and sugar levels. Keywords:    Bamboo beverage, ulanzi, amino acids, sugars, alcohol content.

Antimalarial And Antimicrobial Activities Of Some Heteroleptic Metal(Ii) Complexes Of Sulfadiazine–Vitamin C: Synthesis And Spectroscopic Studies, Ikechukwu P. Ejidike, Mercy O. Bamigboye, Dorcas A. Fadare, Juliana B. Adetunji, Joshua A. Obaleye

Tanzania Journal of Science

Some new Ni(II), Zn(II), Co(II), Cu(II), and Cd(II) of mixed Sulphadiazine and Vitamin C complexes have been synthesized and characterized by different spectroscopic techniques such as FT-IR, elemental analysis, molar conductivity, and magnetic measurements. Both ligands used for this research work act as bidentate ligands towards the central metal ions coordinating through the nitrogen atoms of >C=N–, NH2 groups of Sulphadiazine and oxygen atoms of OH, CO groups of Vitamin C. Tetrahedral and square-planar geometries have been proposed for the complexes. The complexes are stable under atmospheric conditions. The ligands and their complexes were screened for antimicrobial activities against some …

Quantifying The Effects Of Guessing, Position Bias And Prior Knowledge In Multiple Choice Exams, Almasi S Maguya

Tanzania Journal of Science

“Can an examinee pass a multiple-choice (MC) exam by chance?” Many studies have tried to address this question. However, these studies ignore different types of position bias associated with picking an item from a list. Despite the presence of considerable evidence on the existence of position bias in guessing answers in MC exams, these studies assume an examinee chooses answers with equal probability. This paper seeks to fill this gap by quantifying the chance of success in MC exams due to guessing when different types of position bias and prior knowledge are taken into consideration. The paper proposes a probabilistic …

Knowledge, Attitudes And Practices On Urinary Schistosomiasis-Related Morbidity Among Communities In Itilima District, Tanzania, Coletha Yohana, Safari M. Kinung’Hi, Bruno A. Nyundo, Peter F. Rambau, Jared S. Bakuza

Tanzania Journal of Science

Long-term infections by urinary schistosomiasis can result in urinary tract morbidities and increase the threats to public health. Information on the community’s knowledge, attitudes, and practices (KAP) on various aspects of urinary schistosomiasis, caused by Schistosoma haematobium has been lacking in Itilima District, which is likely to perpetuate the transmission of the disease and its negative health consequences. This study assessed knowledge, attitudes and practices on schistosomiasis-related morbidities in Itilima District from February to June 2021. A cross-sectional survey using a structured questionnaire was used, and a total of 657 participants were involved in the study. A total of 575 …

Explicit Solutions For Real-Time Reversible Inhibition Kinetics Using Lambert W Function: Towards Progress Curve Analysis, Geradius Deogratias, Makungu Madirisha, Fortunatus Jacob

Tanzania Journal of Science

Accurate estimation of kinetic parameters is challenging due to the dynamics and mathematical nature of the chemical systems. This paper presents simple, yet efficient closed-form solutions for the enzymatic conversion of the substrate to the product in real-time derived using the Lambert W function. The real values of the Lambert W function were calculated from the Lambert package as implemented in MATLAB. The expressions exhibit remarkable robustness in estimating the parameters for randomized data at 1% to 4% variation in noise levels. Furthermore, unlike the initial rates method, the expressions estimate chemical kinetic parameters utilizing a full range of experimental …

Application Of Mobilenets Convolutional Neural Network Model In Detecting Tomato Late Blight Disease, Richard C Rajabu, Juma S Ally, Jamal F Banzi

Tanzania Journal of Science

Late blight (LB) disease causes significant annual losses in tomato production. Early identification of this disease is crucial in halting its severity. This study aimed to leverage the strength of Convolutional Neural Networks (CNNs) in automated prediction of tomato LB. Through transfer learning, the MobileNetV3 model was trained on high-quality, well-labeled images from Kaggle datasets. The trained model was tested on different images of healthy and infected leaves taken from different real-world locations in Mbeya, Arusha, and Morogoro. Test results demonstrated the model's success in identifying LB disease, with an accuracy of 81% and a precision of 76%. The trained …

Spatial Analysis Of Groundwater Potential: A Firsthand Approach Towards Groundwater Development In Moroto District, Uganda, Musa W. Lowot, Augustina C. Alexander

Tanzania Journal of Science

Groundwater is a vital resource that helps mankind and development. However, in Moroto District challenges of groundwater development has increased arising from changes in rainfall patterns coupled with high abstraction from population increase. In this study, the spatial variability of groundwater potential was assessed to develop a tool that will aid decision on groundwater potential sites selection for groundwater development/exploration. The study utilized an integrated technique and tools such as Remote Sensing (RS), Geographic Information System (GIS) and Multi Criteria Decision Analysis (MCDA) in analysis and delineation of potential areas for successful groundwater development. The generated map through weighted overlay …

Effects Of Long Acting Oxytetracycline On Contagious Bovine Pleuropneumonia Experimentally Infected Cattle, Beatrice Otina, Philip Kitala, Moses Olum, Alexander Kipronoh, Lizzie Chesang’, Kristin Stuke, Hezron Wesonga

Tanzania Journal of Science

Contagious bovine pleuropneumonia is an important disease of cattle. Many strategies employed for its eradication and control have had shortcomings. This study was conducted to determine the effects of long acting Oxytetracycline on its course. The study involved 30 indigenous zebu cattle sourced from an area free of the disease, infected by contact transmission and randomly allocated to Oxytetracycline or saline treatment groups. Clinical observations were recorded on the two groups concurrently. Cattle were tested for the disease using complement fixation test. The mean clinical scores of the groups for each observation was compared post treatment on GENSTAT using unpaired …

Impacts Of Dietary Chrysophyllum Albidum Fruit Pulp On Brain Cholinesterase Function In High-Fat Diet/Streptozotocin-Induced Diabetic Rats, Seun Funmilola Akomolafe, Sunday Idowu Oyeleye, Ifeoluwa Adebayo Odeniyi, Iyabo Folake Oladapo, Ayodele Jacob Akinyemi, Folake Lucy Oyetayo, Olubunmi Bolanle Ajayi

Tanzania Journal of Science

Epidemiologic studies have shown strong correlations between Alzheimer’s disease and diabetes mellitus. The exact mechanism through which this happens remains unclear. However, the dependence on glucose for brain function has been proposed as one possible mechanism. Hence, this study investigated the neuroprotective potential of Chrysophyllum albidum fruit pulp (CAPP) with hypoglycaemic properties in diabetic rats induced with high-fat diet/streptozotocin (STZ). The animals were grouped into seven units as follows: control, STZ-induced, STZ + metformin (positive control), STZ + 5% CAPP, STZ + 10% CAPP, control + 5% CAPP and control + 10% CAPP and each group was made up of …

Mineralogical And Physicomechanical Characterization Of Kaolinitic Clay From Moshi, Northern Tanzania For Potential Ceramic Utilization, Samwel Paul Mziray, Harieth Hellar-Kihampa, Esther H.J. Lugwisha, Leonard Douglas Akwilapo

Tanzania Journal of Science

Kaolin clay from Moshi, northern Tanzania has been characterized for potential ceramics productions. Clay samples taken from three different levels of the deposit were analysed by XRD and XRF. Firing experiments were carried out on experimental briquettes at a maximum temperature of 1300 °C at the rate of 100 °C/hour. The results revealed dominance of kaolinite and illite in the raw clay. The samples were composed majorly by silica (36.88–41.62%), alumina (30.83–32.40%) and hematite (9.29–12.70%). Granulometric analysis showed that the amount of clay decreased with deposit depth. The physicomechanical properties of the clay fired at the optimal temperature of 1300 …

Antibody Epitope Profiling Of The Kshv Lana Protein Using Virscan, Sydney J. Bennett, Dicle Yalcin, Sara R. Privatt, Owen Ngalamika, Salum J. Lidenge, John T. West, Charles Wood

School of Biological Sciences: Faculty Publications

The humoral antibody response against Kaposi sarcoma-associated herpesvirus (KSHV) in infected individuals has been characterized demonstrating the latency-associated nuclear antigen (LANA) as the most antigenic KSHV protein. Despite the antigenicity of the protein, specific LANA epitopes have not been systematically characterized. Here, we utilized a bacteriophage T7 library, which displays 56-amino acid KSHV LANA peptides with 28-amino acid overlap (VirScan), to define those epitopes in LANA targeted by antibodies from a cohort of 62 sub-Saharan African Kaposi sarcoma (KS) patients and 22 KSHV-infected asymptomatic controls. Intra- and inter-patient breadth and magnitude of the anti-LANA responses were quantified at the peptide …

Cenozoic Extension Of The Lake Tanganyika Rift, East Africa: Structures, Tectonostratigraphy And Paleoenvironmental Reconstruction, Shaidu Shaban

Dissertations - ALL

Active continental rifts are ideal sites for understanding the break-up of continents, and long-lived rift lake environments are known as important reservoirs for endemic communities and biodiversity. The sedimentary fill of extensional continental rifts within the East Africa Rift System (EARS) records a long history of continental extension and variable tropical climate that is unparalleled in its duration and fidelity. Continental extensional basins are sensitive to variations caused by the interplay between tectonics, sedimentary processes, and climate change. However, to discern the sedimentary fill history and its related tectonostratigraphy, as well as for reconstructing past climate changes, high-fidelity data such …

Use Of Library Information Resources By Undergraduate Students At Sokoine University Of Agriculture, Tanzania, Nicholaus Mwalukasa Dr

Library Philosophy and Practice (e-journal)

The study examines use of library information resources by students of Sokoine University of Agriculture in Tanzania. The study employed cross-sectional research. Systematic sampling was to select 120 respondents. Data was collected using structured questionnaire. Quantitative data was coded and analyzed using the statistical package for social science (SPSS). Frequency and percentages was analyzed. The results found that most of the respondents mainly used special collection, general collection and special reserve. The study further found that e journal and e-book were the most accessed and utilized e resources, while dissertation was the least used e resources. The study also revealed …

Perspective Of Nyerere On Self-Reliance: A Transformational Rhetorical For Liberating African Identity In Tanzanian Context, Ayub Mwampela

Electronic Theses and Dissertations

Julius Kambarage Nyerere (1922–1999) was the first president of Tanganyika in 1961 and the founding father of the United Republic of Tanzania, after having merged Tanganyika and Zanzibar in 1964. He died from leukemia on October 14, 1999, in London. He was 77 years old. Among the most memorable events in the life of Nyerere is his involvement in the struggle for the freedom of African people from foreign influences.

The goal of this research is to ask and answer to the following question: How does the perspective of Nyerere on self-reliance contribute to the effort of liberating African identity? …

Investigating Determinants Of The Acceptance Of Zoom Technology Through The Lens Of Getamel, Hamed A. Al-Shahrani

Journal of Educational and Psychological Studies

The present study aims to determine factors influencing graduate students’ intention to use Zoom technology. A questionnaire modified to conform to the General Extended Technology Acceptance Model was distributed to 256 graduate students at King Khalid University in Saudi Arabia. The results indicate that the hypothesized model was a good predictor of intention to use. About 71% of the variance of intention to use Zoom technology was explained. The model’s antecedents significantly predicted intention to use. The most crucial factor was attitude, while perceived usefulness had a negligible impact on predicting intention to use. Both perceived ease of use and …

Agentive Intertextual Insertions: (Re)Presentation Of Albinism In Nwelezelanga: The Star Child’S Subtext, Spemba E. Spemba

Journal of Humanities and Social Sciences

The relationship between African traditional healers (sangomas) and persons with albinism is contradictory. Sangomas are rumoured to fuel the narrative that body parts of persons with albinism have magical powers, and so can be harnessed and used by quick wealth-seekers. That narrative has claimed lives and agency of many albinos. There is, however, an emerging trend for sangomas to revert this narrative through media. A good example is Unathi Magubeni, a South African practicing sangoma, who has authored the novel: Nwelezelanga: The Star Child (2016), on the topic. Borrowing from critical ideas on intertextuality, disability studies and agency, this study …

A Lexical Analysis Of The Verb Of Perception Bona (See) In Setswana, Andy Chebanne

Journal of Humanities and Social Sciences

The verb ‘BONA’ (to see) in Setswana represents semantic entailments that are not included in the general entailments that the verb of most perceptions UTLWA (perceive – taste, hear, comprehend, smell, feel) presents. The critical question is what is the basis of the exclusion of BONA from the semantic entailments found in UTLWA? To respond to this question, it is important to examine and characterize the semantic domains of BONA. This verb demonstrates some interesting polysemism when used in different syntactic contexts. The paper will first present the verbs of perceptions in Setswana and their semantic relationships. Further, it will …

The Influence Of Christianity In Swahili Literature: The Case Of Bongo Flavor Poetry Prophesies, Method Samwel

Journal of Humanities and Social Sciences

The influence of religion in Swahili literature has been a centre of Swahili literary scholarship discussions from the 1960s to 1980s. During the time, there were two schools of thought. The first argued that Swahili literature originates from God and that He is the first artist who transmits creative skills to Swahili artists. The second school of thought viewed Swahili literature as a product of socio-economic human activities, and that God has no place in it. By the late 1980s, the discussion on the place of God in Swahili literature appeared to be concluded by a good number of scholars …

The Persuasive Effect Of Legitimation Campaign Discourse, Kelvin Mathayo Lukanga

Journal of Humanities and Social Sciences

This paper is concerned with the persuasive effect of legitimation discourse on Tanzanians’ voting decisions. It examines how former President Jakaya Mrisho Kikwete and Dr Wilbroad Slaa deployed language during the 2010 presidential election campaign to elicit support from the electorate. It also looks at non-discursive/non linguistic factors that influenced the same decisions. The data analysed in this paper is from some of their campaign speeches, and from focus group discussions as well. In analysing the data and discussing the findings, the study draws on Theo van Leeuwen’s semantic-functional approach to critical discourse analysis (henceforth CDA). The results show that …

Challenges And Prospects For The Rock Art Of Mumba Rock-Shelter, Pastory M. Bushozi

Journal of Humanities and Social Sciences

The Mumba rock-shelter and its surrounding landscape are places where evidences for the evolution of human cognitive behaviour and other cultural practices have been uncovered. Deep and stratified archaeological deposits recorded at Mumba have shown unique distinctive technological and behavioural traits with possible connections between Middle Stone Age (MSA), Later Stone Age (LSA), Neolithic, and Iron Age cultures. Archaeological records were found associated with symbolic-revealing objects such as ochre pigments, beads, and stone rubber stained with red ochre, which express the cognitive ability of ancestors who inhabited Mumba rock-shelter and the surrounding landscape from the MSA to the present. Ochre …

Contextualising The Pillars Of Household Food Security: Evidence From Iringa District, Tanzania, Tiemo Romward Haule

Journal of Humanities and Social Sciences

This paper contextualises the pillars of food security based on the perceptions of local communities in Iringa district, Tanzania. The pillars are food availability, food accessibility, food affordability, food adequacy, food acceptability and food stability. The study involved 376 participants. Structured interviews, field observation, focused group discussions, in depth interviews and documentary review were the methods used for data collection. Findings reveal that many households (76.2%) in Iringa were facing food shortage. The findings show that food insecurity in the district was exacerbated by the lack of steadiness in the six pillars of household food security. Given its semi-arid climatic …

A Robust Random Forest Prediction Model For Mother-To-Child Hiv Transmission Based On Individual Medical History, Rebecca Chaula

Tanzania Journal of Engineering and Technology (TJET)

Human Immunodeficiency Virus (HIV) continues to be a leading cause of mortality and reduces manpower throughout the world. HIV transmission from mother to child is still a global challenge in health research. According to UNAIDS, in every 7 girls, 6 are found to be newly infected among adolescents whereby 15-24 years are likely to be living with HIV which is the maternal age and likely to transfer to the child. Machine learning methods have been used to predict HIV/AIDS transmission from mother to child but left behind some important considerations including the use of patient-level information and techniques in balancing …