Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (578)
- Life Sciences (498)
- Biology (249)
- Earth Sciences (183)
- Plant Sciences (179)
-
- Plant Biology (178)
- Geology (139)
- Physics (128)
- Chemistry (118)
- Ecology and Evolutionary Biology (85)
- Environmental Sciences (79)
- Mathematics (75)
- Engineering (74)
- Hydrology (51)
- Microbiology (48)
- Oceanography and Atmospheric Sciences and Meteorology (48)
- Medicine and Health Sciences (46)
- Public Health (42)
- Atmospheric Sciences (41)
- Electrical and Computer Engineering (33)
- Environmental Health (33)
- Food Science (33)
- Pharmacology, Toxicology and Environmental Health (33)
- Computer Sciences (32)
- Pharmacology (32)
- Toxicology (32)
- Materials Science and Engineering (31)
- Agriculture (24)
- Biochemistry (19)
- Biochemistry, Biophysics, and Structural Biology (19)
- Keyword
-
- Physical Sciences (484)
- Biological Sciences (341)
- Mathematics and Computational Sciences (127)
- Tanzania (119)
- Heavy metals (26)
-
- Sediments (24)
- Lake Victoria (15)
- Pollution (15)
- Conservation (14)
- Dar es Salaam (13)
- Contamination (12)
- Adsorption (11)
- Diversity (9)
- Biogas (8)
- Fish (8)
- Forest (8)
- Maize (8)
- Tectonics (8)
- Antibacterial activity (7)
- Antimicrobial activity (7)
- Cytotoxicity (7)
- Malaria (7)
- Phytochemicals (7)
- Species diversity (7)
- Antimicrobial (6)
- Antioxidant (6)
- Climate change (6)
- Ecosystem (6)
- Fisheries (6)
- Pesticide residues (6)
- Publication Year
- File Type
Articles 331 - 360 of 1029
Full-Text Articles in Entire DC Network
Evaluation Of Natural Radioactivity And Radiation Hazards Of Soils Around Petroleum Products Marketing Company Using Gamma Ray Spectrometry, Dayo A. Ayeni, Festus M. Adebiyi
Evaluation Of Natural Radioactivity And Radiation Hazards Of Soils Around Petroleum Products Marketing Company Using Gamma Ray Spectrometry, Dayo A. Ayeni, Festus M. Adebiyi
Tanzania Journal of Science
This study aimed at evaluating natural radioactivity and radiation hazards of soils around a petroleum product marketing company due to anthropogenic influences using gamma ray spectrometry. Top soils (5 cm deep) were collected from diverse locations inside the premises of the Company using standard analytical technique, while control samples were acquired at approximately 200 m from the study area. Mean activity concentrations of the radionuclides in the test soils were 89.36 Bq/kg for 40K, 92.1 Bq/kg for 238U and 10.95 Bq/kg for 232Th, which are more than that of control samples with statistically significant differences. Assessment of the radiological levels …
Exploring Carrier Sense Multiple Access With Collision Avoidance Techniques For Resource Sharing In Broadband Power Line Communications, Godfrey Luwemba, Mussa M. Kissaka, Prosper Mafole
Exploring Carrier Sense Multiple Access With Collision Avoidance Techniques For Resource Sharing In Broadband Power Line Communications, Godfrey Luwemba, Mussa M. Kissaka, Prosper Mafole
Tanzania Journal of Science
A resource sharing in power line communications (PLC) for the home network is restricted by the channel assignment techniques which decide who has the right to gain access to send data. The channel assignment techniques include contention-free and contention-based. The former requires high synchronization due to the deterministic round-trip time. Besides, contention-based utilizes CSMA/CA techniques that allow stations in a network to compete for channel access and are suitable for decentralized network topology. However, a trade-off exists between the number of stations required to gain access versus system efficiency. Whilst some research has been carried out on CSMA/CA resource sharing …
Factors Influencing The Choice Of Place Of Delivery Of A First Child Among Nigerian Women, Olakiitan I Adeniyi, Nathanael B Afolabi, Adesupo A Akinrefon, Ifeyinwa V Omekam, Ifeoluwa R Olonijolu
Factors Influencing The Choice Of Place Of Delivery Of A First Child Among Nigerian Women, Olakiitan I Adeniyi, Nathanael B Afolabi, Adesupo A Akinrefon, Ifeyinwa V Omekam, Ifeoluwa R Olonijolu
Tanzania Journal of Science
Among the factors responsible for maternal deaths in developing countries is complications during pregnancy and childbirth, and as such, the choice of place for delivery is vital as the quality of attention received can either aid or reduce the risks attached to child bearing. This study seeks to statistically model factors that determine the place of delivery in Nigeria among women of reproductive age taking into consideration possible nesting structure in the mode of data collection. A two-level hierarchical multilevel logistic model with the individual women as the lower level and the state of residence as the second level was …
The Reconstruction Of The Late Pleistocene And Holocene Vegetation Dynamics In Lake Eyasi Basin, Northern Tanzania, Pastory M. Bushozi, Cassian T. Mumbi, Veronica M. Muiruri, Musa S. Mwitondi
The Reconstruction Of The Late Pleistocene And Holocene Vegetation Dynamics In Lake Eyasi Basin, Northern Tanzania, Pastory M. Bushozi, Cassian T. Mumbi, Veronica M. Muiruri, Musa S. Mwitondi
Tanzania Journal of Science
Lake Eyasi Basin of northern Tanzania plays a pivotal role in the study of human-environment interactions and in understanding human flexibility and adaptability through technological innovations over time and space. In this study, phytoliths from ancient soils and fossil pollen proxies from radiocarbon-dated sequences from Kisimangeda on the north-eastern edge of the Lake Eyasi Basin, are used to interpret trends in climatic changes recorded since the Last Glacial Maximum (LGM) to the present. We used pollen and phytolith abundances from a core that was recovered on the northern margin of saline Lake Eyasi at the depth of five metres. The …
Chemical Constituents And Antimicrobial Evaluation Of Selected Aloe Vera Branded Commercial Products In Tanzania, Stephen S Nyandoro, Bahati F Kyando, Joan Je Munissi
Chemical Constituents And Antimicrobial Evaluation Of Selected Aloe Vera Branded Commercial Products In Tanzania, Stephen S Nyandoro, Bahati F Kyando, Joan Je Munissi
Tanzania Journal of Science
Chemical compositions and antimicrobial activities of twenty-two Aloe vera branded commercial products in Tanzania, a case of marketed soaps, creams, lotions, petroleum jelly, toothpastes and hair conditioner products in Dar es Salaam, were investigated. Chemical compositions were analysed using gas chromatography-mass spectrometry (GC-MS) whereas antimicrobial activities were evaluated using agar dilution method against four bacteria species, namely Staphylococcus aureus, Escherichia coli, Klebsiella pneumoneae and Salmonella typhi) and two fungal species Candida albicans and Cryptococcus neoformans. The GC-MS analysis revealed the presence of seven non-polar constituents, namely methyl palmitate, 9-octadecenoic acid methyl ester, methyl stearate, tetratetracontane, hexacosane, and pentacosane and methyl …
Modelling Internet Traffic Streams With Ga/M/1/K Queuing Systems Under Self-Similarity, Jumoke Popoola, Olusogo J Popoola, Oyebayo R Olaniran
Modelling Internet Traffic Streams With Ga/M/1/K Queuing Systems Under Self-Similarity, Jumoke Popoola, Olusogo J Popoola, Oyebayo R Olaniran
Tanzania Journal of Science
High-intensity concurrent arrivals of request packets in Internet traffic can cause dependence of event-to-event-times of the requests being served, which causes non-memoryless, modelled with heavy-tail distributions unlike common known traffics. The performance of Internet traffic can be examined using analytical models for the purpose of optimizing the system to reduce its operating costs. Therefore, our study examined a Ga/M/1/K Internet queue class (Gamma arrival processes, Ga; with memoryless-Poisson service process, M; a single server, 1, and K waiting room) and proposed specific derivations of its performance indicators. Real-life data of a corporate organisation Internet server was monitored at both peak …
A Mathematical Model And Sensitivity Analysis Of Lassa Fever With Relapse And Reinfection Rate, Latifat M Erinle-Ibrahim, Olukayode Adebimpe, Waheed O Lawal, Joshua O Agbomola
A Mathematical Model And Sensitivity Analysis Of Lassa Fever With Relapse And Reinfection Rate, Latifat M Erinle-Ibrahim, Olukayode Adebimpe, Waheed O Lawal, Joshua O Agbomola
Tanzania Journal of Science
In this research paper, we depict an unprecedented four-dimensional ordinary differential equation modeling the dynamic transmission of the Lassa fever virus incorporating relapse and reinfection rate. Recent studies showed that the recovered individuals from Lassa fever can again be susceptible; which contradicted the common assumptions made by different researchers on modeling of Lassa fever. So, this article corrects and states the implications of the assumptions on the population density. The numerical simulations unveil the effect of relapse, reinfection, and treatment rate in the affected population. Performing sensitivity analysis suggests all new incorporated parameters can impact the infection dynamics substantially. The …
Toxicity Assessment Of The Crude Ethanolic Pod Extract Of Swartzia Madagascariensis Desv. In Rats, Adelina A. Mwakalila, Saada M. Mbepera, Shaabani A. Mshamu, Amina Msonga, Washa B. Washa
Toxicity Assessment Of The Crude Ethanolic Pod Extract Of Swartzia Madagascariensis Desv. In Rats, Adelina A. Mwakalila, Saada M. Mbepera, Shaabani A. Mshamu, Amina Msonga, Washa B. Washa
Tanzania Journal of Science
This study assessed toxicity of the crude ethanolic pod extracts of Swartzia madagascariensis Desv in Wistar rats. Forty (40) Wistar rats aged 8–10 weeks were orally administered with crude extracts from pods of S. madagascariensis. Chemical analysis of serum and histopathology of liver and kidney from test animals were performed to determine the levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and creatinine in serum. In addition, serum albumin levels were also determined. The levels of ALT, AST and creatinine were found to be high in groups treated with crude extracts compared to the control group, suggesting some damage in …
Effects Of Feed Moisture Content, Soybean Ratio And Barrel Temperature On Physical And Functional Properties Of Extruded Maize-Soybean Flour Blends, Robert Mugabi, Stellah Byakika, Ivan Muzira Mukisa
Effects Of Feed Moisture Content, Soybean Ratio And Barrel Temperature On Physical And Functional Properties Of Extruded Maize-Soybean Flour Blends, Robert Mugabi, Stellah Byakika, Ivan Muzira Mukisa
Tanzania Journal of Science
The effects moisture content, temperature and soybean ratio on expanded product characteristics of extruded maize-soybean blends were studied. Response surface methodology was used to study the effects of extrusion conditions on extrudate properties taking barrel temperature (BT), feed moisture content (FM) and soybean flour ratio (SR) as factors. Expansion ratio (ER), water absorption index (WAI), water solubility index (WSI), hardness and colour (b* - (+) yellowness) of the extrudates were determined. BT and FM had significant effects on ER (p < 0.05). At low FM levels, ER increased with BT. It was observed that both FM and BT significantly affected WAI and WSI. WAI increased as FM increased. Increasing FM to 20% resulted in a decrease in WSI, beyond which an increase was observed. Hardness increased significantly as feed moisture content increased. High SR content significantly increased the extrudate hardness. FM had no significant effect on colour. Colour increased as the SR and BT increased. Significant regression models explained the effects of SR, FM, and BT on all response variables. All of the response variables' R2, were higher than 0.89. Keywords: Maize, Soybean, moisture content, extrusion
Identification And Larvicidal Efficacy Of Mosquito-Repelling Plants Used In Malaria Vector Control In South-East Benin, Camille O Tante, Armel Djenontin, Saïd Chitou, Wilfried Sewade, Pierre Agbani, Martin Akogbeto, Daniel C Chougourou
Identification And Larvicidal Efficacy Of Mosquito-Repelling Plants Used In Malaria Vector Control In South-East Benin, Camille O Tante, Armel Djenontin, Saïd Chitou, Wilfried Sewade, Pierre Agbani, Martin Akogbeto, Daniel C Chougourou
Tanzania Journal of Science
After identifying issues posed by some synthetic insecticides, the scientific community is now looking for other natural products with insecticidal and/or insect repellent characteristics. This study aimed to identify the plants of the Beninese flora known for their insecticidal and/or insect repellent effects and the indigenous techniques of their use and to evaluate the combined efficacy of extracts of a few on mosquito larvae for the control of malaria vectors in the South-East of Benin. A survey was conducted and the insecticidal effects of three combinations made from Azadirachta indica, Cymbopogon nardus and Hyptis suaveolens oils on Anopheles gambiae larvae …
Mathematical Model Of Covid-19 Transmission Dynamics With Double Dose Vaccination, Tawakalt A Ayoola, Mutairu K Kolawole, Amos O Popoola
Mathematical Model Of Covid-19 Transmission Dynamics With Double Dose Vaccination, Tawakalt A Ayoola, Mutairu K Kolawole, Amos O Popoola
Tanzania Journal of Science
This research attempted to investigate the effects of double dose vaccination in a non-linear mathematical model of Covid-19 infections with special compartments class termed first and second dose vaccination. The basic reproduction number was obtained, the stability of the model was analyzed, and the sensitivity analysis was also carried out. Of interest is the numerical simulation of the model where the impacts of contact rate, first and second dose vaccination were studied. The obtained results recommended how to control the corona virus keeping in mind the contact rate and vaccination. Keywords: Covid-19, Double dose Vaccination, Basic Reproduction Number, Global Stability
Modelling And Performance Analysis Of Hydrocyclones: The Case Of Buzwagi Gold Mine, Alphonce Wikedzi, Thomas Mütze
Modelling And Performance Analysis Of Hydrocyclones: The Case Of Buzwagi Gold Mine, Alphonce Wikedzi, Thomas Mütze
Tanzania Journal of Science
The performance of hydrocyclones at Buzwagi Gold Mine (BGM) was investigated in three full scale survey campaigns. Thereafter, several empirical and theoretical hydrocyclone models were used for prediction of hydrocyclone performance. The survey data revealed poor performance of the grinding circuit caused by a circulating load higher than the design. Further, the poor performance of the grinding circuit had consequences on hydrocyclones overflow particle size (i.e. a much coarser product, xP,80 > 200 µm) than target (125 µm). In addition, the operation indicates overloading of the hydrocyclones due to feed rates being 10–18% above the design capacity. Apart from their deficiencies, …
Seasonality In Phytoplankton Species Composition And Their Influence On Small Pelagic Fish Along The Western Pemba Channel, Margareth S Kyewalyanga
Seasonality In Phytoplankton Species Composition And Their Influence On Small Pelagic Fish Along The Western Pemba Channel, Margareth S Kyewalyanga
Tanzania Journal of Science
The influence of phytoplankton biomass on small pelagic fish groups was studied at three sites along the Western Pemba Channel, to assess the contribution of seasonality. Sampling took place at the three sites in the coastal waters of Tanga, Tanzania. The study used in-situ data from July 2016 to January 2017, remotely-sensed chlorophyll-a data from August 2016 to August 2017 and 2019–2020, and small pelagic fish catch data from the same periods as the remotely-sensed data. The dominant groups at all the three sites were diatoms, dinoflagellates, and cyanobacteria, with diatoms having the highest number of species compared to the …
Characterization Of Clay And Granite Dust Blends As Novel Materials For Energy Storage And Diffuser In Constructing Flat-Plate Solar Collector, Tajudeen Kolawole Ajiboye, Mustapha Olawale Fabiyi, Ndagi Mustapha, Sulaiman Abdulkareem
Characterization Of Clay And Granite Dust Blends As Novel Materials For Energy Storage And Diffuser In Constructing Flat-Plate Solar Collector, Tajudeen Kolawole Ajiboye, Mustapha Olawale Fabiyi, Ndagi Mustapha, Sulaiman Abdulkareem
Tanzania Journal of Science
Sun is the main source of solar energy, and the energy it releases to the Earth’s surface in one hour is more than what the whole planet consumes in a year. This present work is about characterizing novel material that can be used as energy storage and diffuser in constructing flat plate solar collector. Materials used are clay and granite dust obtained from Okelele and Kulende Quarry sites, both in Ilorin, Kwara State, Nigeria. The materials were sun-dried; the clay crushed before the two materials were sieved into different particle sizes. They were thereafter blended into different ratios and then …
Potential Economic And Environmental Benefits Of Faecal Sludge Derived Compost And Char Briquettes: The Case Of Dar Es Salaam, Tanzania, Isabela T Mkude, Richard Kimwaga, Sara Gabrielsson
Potential Economic And Environmental Benefits Of Faecal Sludge Derived Compost And Char Briquettes: The Case Of Dar Es Salaam, Tanzania, Isabela T Mkude, Richard Kimwaga, Sara Gabrielsson
Tanzania Journal of Science
The concept of resource recovery, particularly from waste has recently gained much attention and popularity. The aim of this study was to quantify the potential economic and environmental benefits of recovering nutrients and energy from faecal sludge (FS). The empirical data were collected from three unplanned settlements of Dar es Salaam City at Keko, Kipawa and Manzese. Two scenarios were developed to recover nutrients and energy. The estimations of potential amounts of compost and char briquettes were performed by using the resource value mapping (REVAMP) tool. Results from REVAMP indicated daily economic benefits across the study areas ranging between 680 …
Effects Of Temperature And Salinity On Incubation Time, Hatching Success, And Larvae Survival Of The Giant Tiger Prawn Penaeus Monodon Under Experimental Conditions, Sawadi Ndunguru, Marcelian Njau, Blandina Robert Lugendo
Effects Of Temperature And Salinity On Incubation Time, Hatching Success, And Larvae Survival Of The Giant Tiger Prawn Penaeus Monodon Under Experimental Conditions, Sawadi Ndunguru, Marcelian Njau, Blandina Robert Lugendo
Tanzania Journal of Science
Prawns are commercially one of the most important marine resources. However, in their early developmental stages, they face challenges related to physico-chemical and environmental changes. This study aimed at investigating the effects of temperature and salinity on egg incubation time, hatching success, larval and postlarval survival of the giant tiger prawn, Penaeus monodon (Fabricius 1798) obtained from the coastal waters of Tanzania. The adult females P. monodon collected off Rufiji delta were left to acclimatize and spawn at 28.5 ± 0.5 °C and 32 ppt in the hatchery. Spawned eggs were incubated at experimental temperatures of 27 °C, 31 °C …
Determination Of Factors That Contribute To The Prevalence Of Diarrhoea Among Children Under Five Years Of Age In Association With The Status Of Drinking Water Sources At Bububu, Zanzibar, Wahida M. Ali, Emmanuel S. Kigadye
Determination Of Factors That Contribute To The Prevalence Of Diarrhoea Among Children Under Five Years Of Age In Association With The Status Of Drinking Water Sources At Bububu, Zanzibar, Wahida M. Ali, Emmanuel S. Kigadye
Tanzania Journal of Science
This study aimed to determine the contributing factors for diarrhoea prevalence among children under-five years at Bububu, Zanzibar. The study applied a cross-sectional research design that used quantitative methods. Data were collected from 97 mothers/caregivers of the children. Structured questionnaires were used for assessing socio-economic factors contributing to diarrhoea. Laboratory experiments were carried out to assess the quality of drinking water sources. Most Probable Number (MPN) count per 100 ml was measured from drinking water sources. Multivariate logistic analysis was computed to assess independent factors of childhood diarrhoea. The prevalence of diarrhoea was significantly associated with; the caregiver’s level of …
Carbon Monoxide Oxidation On Model Planar Titania Supported Platinum Nanoparticles Catalyst, Jovine Emmanuel, Brian Hayden
Carbon Monoxide Oxidation On Model Planar Titania Supported Platinum Nanoparticles Catalyst, Jovine Emmanuel, Brian Hayden
Tanzania Journal of Science
A high-throughput (parallel) thermographic screening methodology was developed to enable the measurements of the particle size and support influence on heterogeneous catalysts. A high throughput screening chip has been used to establish the catalytic activity of titania supported platinum nanoparticles catalyst for CO oxidation reaction. The catalytic activity of Pt nanoparticles between 1.3 to 7.8 nm has been investigated for CO conversion at a pressure of 0.11 and 1.1 mbar with O2:CO ratio of 1:1 at 80 °C and 0.6, 1.1 and 2.4 mbar at O2:CO ratio of 1:1 at 240 °C. At these experimental conditions, there was an increase …
Impact Of Radio Operating Environments On Broadband Connectivity, Libe V Massawe, Peter J Chitamu
Impact Of Radio Operating Environments On Broadband Connectivity, Libe V Massawe, Peter J Chitamu
Tanzania Journal of Science
Broadband connectivity and services commonly referred to as the Internet is the key enabling facility for the modern digital economy and the driver for the Fourth Industrial Revolution (4IR or Industry 4.0). In Tanzania, there are over 49% Internet subscriptions for mobile broadband services using 3G UMTS and 4G standards infrastructure, which are predominantly available in urban areas. The non-urban areas remain mostly 2G coverage areas and lack mobile broadband connectivity and services. Transforming existing 2G mobile networks to broadband infrastructure can be achieved by swapping 2G sites with 3G or 4G sites or incrementally replacing 2G sites with 3G …
Weathering The Storm: Community Socio-Economic And Physical Vulnerability Assessment Of Informal Settlements To Disasters In Arusha City, Tanzania, Herbert Hambati
Weathering The Storm: Community Socio-Economic And Physical Vulnerability Assessment Of Informal Settlements To Disasters In Arusha City, Tanzania, Herbert Hambati
Tanzania Journal of Science
Urban population growth has demonstrated a synergetic relationship with the growth of informal settlements and vulnerability to disasters in urban areas. This study employed Community Participatory Vulnerability Assessment (CPVA) to analyse vulnerability in informal settlements in Arusha City, Tanzania. The results show that a plethora of factors, including socio-economic and physical realities interact in complex non-linear ways to shape vulnerability to disasters in informal settlements in the city. The study shows that coping strategies of some individuals in informal settlements reinforce their risks to disasters. This is particularly demonstrated by the stones that are positioned on weak roof structures for …
Avian Use Of Habitat Patches Dominated By Exotic Leucaena Leucocephala Or Native Tree Species In Urban Dar Es Salaam, Tanzania, Chacha Werema, Charles Wilson
Avian Use Of Habitat Patches Dominated By Exotic Leucaena Leucocephala Or Native Tree Species In Urban Dar Es Salaam, Tanzania, Chacha Werema, Charles Wilson
Tanzania Journal of Science
There has been an incursion of an exotic Leucaena leucocephala in disturbed areas and into habitat patches of native tree species in some areas in Tanzania. However, the impacts of this exotic tree on native biodiversity are not well understood. We assessed bird use of habitat patches dominated by L. leucocephala in comparison to patches of native tree species at the University of Dar es Salaam main campus, Tanzania, by comparing bird species richness, abundance and diversity using mist netting. Based on the same mist netting efforts in each habitat patch type, patches of native trees had significantly higher overall …
Charcoal Whirlwinds And Post-Fire Observations In Serengeti National Park Savannahs, Colin J. Courtney Mustaphi, Heleen C. Vos, Rob Marchant, Colin Beale
Charcoal Whirlwinds And Post-Fire Observations In Serengeti National Park Savannahs, Colin J. Courtney Mustaphi, Heleen C. Vos, Rob Marchant, Colin Beale
Tanzania Journal of Science
Whirlwinds and visible dust devils occur over semi-arid ecosystems and entrain particles from the ground surface. Fires produce abundant charcoal across savannahs and the resulting blackened surfaces create a large albedo contrast. Whirlwinds have been observed associated with active fires; yet, there are few published observations on post-fire landscapes. Spatiotemporal patterns of whirlwinds have been documented for a limited number of regions and have not been made for the ecosystems of eastern Africa. From field-based sightings in the Serengeti National Park, Tanzania, we report on whirlwinds over burned savannah patches that entrained large quantities of charcoal to produce black coloured …
Using Constructed Wetlands To Remove Pathogenic Parasites And Fecal Coliforms From Wastewater In Tanzania, Abdallah Zacharia, Wajihu Ahmada, Anne H. Outwater, Billy Ngasala, Rob Van Deun
Using Constructed Wetlands To Remove Pathogenic Parasites And Fecal Coliforms From Wastewater In Tanzania, Abdallah Zacharia, Wajihu Ahmada, Anne H. Outwater, Billy Ngasala, Rob Van Deun
Tanzania Journal of Science
Wastewater treatment is a widely used health protection measure that can be applied to control the transmission of wastewater-related infectious diseases to communities exposed to wastewater. This study determined the efficiency of three full-scale constructed wetlands (CWs) in removing pathogenic parasites and fecal coliforms (FC) bacteria from wastewater. Wastewater samples were collected from three CW systems located in the Dar es Salaam and Iringa regions of Tanzania. The modified Bailenger and modified Ziehl-Neelsen stain techniques were used to detect and quantity parasites. The membrane filtration method was used to detect and quantify FC. Data were analysed using IBM SPSS version …
Distribution And Pattern Of An Insurance Health Claim System: A Time Series Approach, Maxwell Mashasha, Praise Mutize, Felix Mazunga
Distribution And Pattern Of An Insurance Health Claim System: A Time Series Approach, Maxwell Mashasha, Praise Mutize, Felix Mazunga
Tanzania Journal of Science
There is a continuous increase in health costs, thereby increasing pressure on individuals and consequently making the amounts claimed by the insured to be on the increase. In this study, data was collected from a large local insurance company in Zimbabwe for the period from January 2012 to December 2016. The aim of this study was to analyse the distribution and future pattern of insurance health claim system using time series approach. Akaike information criterion and Schwarz Bayesian criterion were used to select the adequate model through maximum likelihood estimation methods. ARIMA (0, 0, 0) (1, 0, 1) [12] is …
Reproductive Potential Of The Mackerel Scad, Decapterus Macarellus (Cuvier, 1833) In The Coastal Waters Of Tanzania, Joseph S Sululu, Blandina R Lugendo, Benaiah L Benno
Reproductive Potential Of The Mackerel Scad, Decapterus Macarellus (Cuvier, 1833) In The Coastal Waters Of Tanzania, Joseph S Sululu, Blandina R Lugendo, Benaiah L Benno
Tanzania Journal of Science
This study investigated the reproductive biology of Decapterus macarellus locally known as ''Msumari", one of the most economically important scad fish along the coastline of Tanzania. Fish samples were collected from ring net artisanal fishers operating in Tanga and Bagamoyo coastal waters, monthly between April 2019 and September 2020. Findings indicated that D. macarellus spawns throughout the year with peaks in August at Tanga and September at Bagamoyo. Overall sex ratios (M: F) were 1:1.03 (Tanga) and 1:1.2 (Bagamoyo) in favour of females. The males and females of D. macarellus at Tanga attained the first maturity at 145.5 mm and …
The Role Of Agricultural Social Enterprise To Smallholder Farmers’ Adaptive Capacity To Climatic Stresses In Tanzania, Stanley G Kulanga, Noah M Pauline
The Role Of Agricultural Social Enterprise To Smallholder Farmers’ Adaptive Capacity To Climatic Stresses In Tanzania, Stanley G Kulanga, Noah M Pauline
Tanzania Journal of Science
This paper intended to ascertain the implications of agricultural social enterprise on the adaptive capacity of smallholder farmers to climatic stresses in the Kilolo District, Tanzania. The study used a sample of 90 households. Household questionnaires, focus group discussions (FGD), and key informant interviews were used to collect primary data for this study. Secondary data were collected through a review of literature relevant to this study. The content analysis was used to analyse qualitative data, whereas quantitative data were subjected to Statistical Product and Service Solution (SPSS) version 20 for analysis. Microsoft Excel 2007 was used to analyse rainfall and …
Solar Cells: Types, Modules, And Applications–A Review, Amira Abd-Elfattah Darwish, Rana S. Abdelmohsen, Mohamed Ahmed, M. Megeed
Solar Cells: Types, Modules, And Applications–A Review, Amira Abd-Elfattah Darwish, Rana S. Abdelmohsen, Mohamed Ahmed, M. Megeed
Tanzania Journal of Science
The basic operating principle of photovoltaic (PV) devices is the conversion of solar irradiation into electricity. There are various applications of this principle in many countries such as Egypt, Nigeria and Denmark. Most of the solar PV projects are designed for street lighting, water pumping and water desalination. However, we hope about wide range of using the appropriate components and best technical procedures, standard PV projects with maximum performance output. The present systems now provide 20% to 40% only of the community's heat or lightness on annual basic needs. These include innovative and alternative ways to reduce material uses and …
Investigation Of The Vertical Profile Radio Refractivity Gradient And Effective Earth Radius Factor (K-Factor) In Transmission Link Over Oyo, Oyo State, South Western Nigeria, Akeem L. Sheu, Kamaldeen O Suleman, Qasim A Adeniji
Investigation Of The Vertical Profile Radio Refractivity Gradient And Effective Earth Radius Factor (K-Factor) In Transmission Link Over Oyo, Oyo State, South Western Nigeria, Akeem L. Sheu, Kamaldeen O Suleman, Qasim A Adeniji
Tanzania Journal of Science
Surface radio refractive gradient and k-factor are very imperative in observing propagation conditions, designing and planning of microwave communication links in the lower part of the atmospheric boundary layer. The measurement of weather variables (air temperature, atmospheric pressure, relative humidity and wind speed) were conducted in this study at the School of Science, Emmanuel Alayande College of Education, Oyo (7.83°N, 3.95°E), Oyo State, Nigeria. The research was carried out for a period of one year (January to December, 2020) using self-designed cost effective portable weather monitoring systems. The systems were sited from the ground to a height of 200 m …
Synthesis Of Polydispersed P(St-Mma-Aa) Microspheres And Fabrication Of Colloidal Crystals With Non-Compact Morphology, Ikhazuagbe H. Ifijen, Eribe M. Jonathan, Jacob N. Jacob, Nyaknno U. Udokpoh, Ukeme D. Archibong
Synthesis Of Polydispersed P(St-Mma-Aa) Microspheres And Fabrication Of Colloidal Crystals With Non-Compact Morphology, Ikhazuagbe H. Ifijen, Eribe M. Jonathan, Jacob N. Jacob, Nyaknno U. Udokpoh, Ukeme D. Archibong
Tanzania Journal of Science
Great attention has been given to the synthesis of monodispersed and uniform colloidal polymer particles with controllable particle sizes. However, investigations on the preparation, characterization and fabrication of polydisperse polymeric particles are very few. Polydisperse polymers are also needed to meet the new demands of the modern markets due to the ease of their synthesis. This study, therefore, synthesized polydispersed poly(styrene-methyl-methacrylate acrylic-acid) (P(St-MMA-AA)) via emulsion polymerization synthetic approach under unstable reaction conditions. The synthesized P(St-MMA-AA) microparticles were characterized using Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), a thermo-gravimetric analyzer (TGA) and scanning electron microscope (SEM). The DLS results …
Boron Doped Zno Films Deposited By Dc Reactive Sputtering Using Zn:B Target: Influence Of The Deposition Temperature On The Structural, Electrical And Optical Properties, Lwitiko P. Mwakyusa, Nuru R. Mlyuka, Margaret E. Samiji
Boron Doped Zno Films Deposited By Dc Reactive Sputtering Using Zn:B Target: Influence Of The Deposition Temperature On The Structural, Electrical And Optical Properties, Lwitiko P. Mwakyusa, Nuru R. Mlyuka, Margaret E. Samiji
Tanzania Journal of Science
ZnO-based transparent and conducting oxides (TCOs) are commonly used as a window layer in thin-film solar cells. However, TCOs with high transparency in the visible and near-infrared parts of the electromagnetic spectrum, plus excellent electrical properties are required in this application. In this study, TCOs based on ZnO:B films deposited by DC reactive sputtering using Zn:B alloy target were investigated. The impact of deposition temperature on the growth and physical properties of the films was examined. Structural, optical and electrical properties of these films were investigated by means of x-ray diffraction (XRD), Ultraviolet-Visible-Near Infrared (UV-VIS-NIR) spectroscopy, and Hall effect measurement, …