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 181 - 210 of 1029
Full-Text Articles in Entire DC Network
Extraction Of Natural Dyes From Delonix Regia Flowers For Cotton Fibres, Lutamyo Nambela, Liberato V Haule
Extraction Of Natural Dyes From Delonix Regia Flowers For Cotton Fibres, Lutamyo Nambela, Liberato V Haule
Tanzania Journal of Science
Textile colouration is among the major industry that pollutes the environment with effluents rich in dye chemicals. Most of the dyes used are synthetics which possess health and environmental impacts. Potentially, the use of bio-based dyes and other chemicals can lessen the environmental challenges of the textile effluents. This study reports on sustainable extraction and dyeing of cotton fabric using extract of Delonix regia flowers. The extraction process was done using acidified water as a solvent and the dyeing process was free from hazardous auxiliary chemicals. To improve the dyeing performance, banana sap was used as an affordable and eco-friendly …
Modeling The Transmission Dynamics Of Tuberculosis In Humans, Farida Kisinda, Joshua A. Mwasunda, Mbwiga S. Aloni
Modeling The Transmission Dynamics Of Tuberculosis In Humans, Farida Kisinda, Joshua A. Mwasunda, Mbwiga S. Aloni
Tanzania Journal of Science
Tuberculosis (TB) is a major threat to human health particularly in most of developing countries. In this article, we formulate and analyze a deterministic model for the transmission dynamics of pulmonary and extra-pulmonary tuberculosis. The next generation method is employed to find the basic reproduction number which helps to determine whether TB clears or persists in the human population. Global stability of model equilibria is done through Lyapunov functions whereas the normalized forward sensitivity index method is adopted to determine parameters that drive tuberculosis. Analysis shows that both TB free and endemic equilibria exist. The TB free equilibrium is globally …
Prevalence And Predictors Of Cesarean Delivery In A Tertiary Hospital In Taraba State, Nigeria, Olateju Alao Bamigbala, Ayodeji Oluwatobi Ojetunde, Maza Tanko
Prevalence And Predictors Of Cesarean Delivery In A Tertiary Hospital In Taraba State, Nigeria, Olateju Alao Bamigbala, Ayodeji Oluwatobi Ojetunde, Maza Tanko
Tanzania Journal of Science
A cesarean section (CS) is a surgical technique in which a baby is delivered through an abdomen and uterine incision following fetal viability. It is imperative to identify the factors that influence the use of CS to reduce the needless use of this life-saving procedure and increase its availability for those who need it most. Therefore, this study assesses the prevalence and predictors of cesarean delivery in a tertiary hospital in Taraba state, Nigeria. Information of pregnant women who came for delivery to Federal Medical Center, Jalingo, Taraba state Nigeria from August 2021 to August 2023 was collected. Binary Logistic …
The Effects Of Algal Blooms On Oxygen Levels In Lakes Babati And Eyasi, Tanzania, Amelia S. Buriyo, Nyatwere D. Mganga, Mary Melchiory
The Effects Of Algal Blooms On Oxygen Levels In Lakes Babati And Eyasi, Tanzania, Amelia S. Buriyo, Nyatwere D. Mganga, Mary Melchiory
Tanzania Journal of Science
Globally aquatic ecosystems are reportedly overwhelmed by algal blooms due to excessive deposition of nutrients which ultimately cause hypoxia, leading to massive fish death. This study aimed at assessing the relationship between algae contents and dissolved oxygen (DO) in Lake Babati which is threatened by anthropogenic activities, whereas Lake Eyasi was used as a control. Algae contents (chlorophyll a), DO and surface water temperature were measured using standard methods. Results revealed that the mean algae content was significantly higher (4.47±0.88 mg/L) in Lake Babati than in Lake Eyasi (1.6±0.45 mg/L) (P < 0.05) and was beyond the standard permissible levels for domestic water supply and healthy ecosystem. Conversely, DO was significantly lower in Lake Babati than in Lake Eyasi (P < 0.05). There was no significant difference in water temperature in the two lakes (P > 0.05). Furthermore, there was an inverse relationship between algae …
Angular Distribution Of Bremsstrahlung Spectral Temperature Measured In A Full Dimension Of Ecr Ion Source Using Nai(Ti) Detector, Mwingereza J. Kumwenda
Angular Distribution Of Bremsstrahlung Spectral Temperature Measured In A Full Dimension Of Ecr Ion Source Using Nai(Ti) Detector, Mwingereza J. Kumwenda
Tanzania Journal of Science
Measurement of angular distribution (AD) of the bremsstrahlung spectral temperature from a full dimension of the Electron Cyclotron Resonance Ion Source (ECRIS) along the beam axis is challenging. To overcome some challenges, this paper presents the AD of the bremsstrahlung spectral temperature measured in a full dimension of the ECRIS along the beam axis using data obtained from the Busan Center of Korea Basic Science Institute (KBSI). The bremsstrahlung spectral temperature from 28-GHz ECR Ion source at the KBSI was measured in six, three, and nine azimuthal angles at the injection, centre, and extraction sides of the ECRIS using three …
Influence Of Stacking Order On The Structural And Optical Properties Of Cu2znsns4 Absorber Layer Prepared From Dc-Sputtered Oxygenated Precursors, January S Gwaydi, Hezekiah B Sawa, Egidius R Rwenyagila, Nathanael R Komba, Talam E Kibona, Nuru R Mlyuka, Margaret E Samiji, Lwitiko P Mwakyusa
Influence Of Stacking Order On The Structural And Optical Properties Of Cu2znsns4 Absorber Layer Prepared From Dc-Sputtered Oxygenated Precursors, January S Gwaydi, Hezekiah B Sawa, Egidius R Rwenyagila, Nathanael R Komba, Talam E Kibona, Nuru R Mlyuka, Margaret E Samiji, Lwitiko P Mwakyusa
Tanzania Journal of Science
Several studies have attempted to overcome the sudden volume expansion of the precursor during sulfurization by the use of oxygen-containing precursors when growing the CZTS absorber. This work demonstrates the influence of precursor stacking orders on the properties of the CZTS thin film absorber layer from DC-sputtered oxygenated precursors for solar cell applications. CZTS absorber layers were prepared from three types of DC-sputtered stacks, namely, Zn-O/Sn/Cu, Sn/Zn-O/Cu, and Sn/Cu/Zn-O. The precursors were sequentially deposited on a soda lime glass (SLG) using DC-magnetron sputtering and annealed in a sulfur and nitrogen ambient. X-ray diffractometry (XRD) and Raman spectroscopy analyses reveal the …
Genetic Characterization Of Water Yam (Dioscorea Alata L.) And Production Constraints Of Yam In Pwani Region And Unguja Island, Tanzania, Gladness E Temu, Veneranda E Mlegi, Nessie D Luambano
Genetic Characterization Of Water Yam (Dioscorea Alata L.) And Production Constraints Of Yam In Pwani Region And Unguja Island, Tanzania, Gladness E Temu, Veneranda E Mlegi, Nessie D Luambano
Tanzania Journal of Science
Yam (Dioscorea spp.) is a tuber crop cultivated in over 30% of all regions in Tanzania, contributing to the carbohydrate needs of many households. The morphological and genetic diversity of water yam (D. alata L.) local cultivars collected from Pwani region and Unguja Island were evaluated using 26 agro-morphological characters and 10 Short Sequence Repeat (SSR) markers. Cluster analysis using morphological characters classified nine water yam local cultivars into two main clusters with three subclusters. Tuber flesh and leaf colour were the main descriptors for clustering. The genetic diversity of 128 water yam genotypes using ten polymorphic SSR markers generated …
Microbiological Quality Of Irrigation Water And Leafy Vegetables In Dar Es Salaam, Tanzania, Bubelwa L. Kamara, Godwill D. Mrema, Thomas J. Lyimo
Microbiological Quality Of Irrigation Water And Leafy Vegetables In Dar Es Salaam, Tanzania, Bubelwa L. Kamara, Godwill D. Mrema, Thomas J. Lyimo
Tanzania Journal of Science
The quality of water used for the irrigation of leafy vegetables in urban settings is in doubt due to contamination associated with poor hygiene and water pollution. This study examined the microbiological quality of irrigation water and leafy vegetables at Chang’ombe in Dar es Salaam, Tanzania as well as the perceptions and level of awareness of nearby consumers. Water and leafy vegetable samples were analysed for faecal coliform (FC) using standard techniques. Perception and awareness of consumers were collected using a questionnaire survey. The results showed an average FC count of 406.1 ± 16.40 MPN/100 ml for the irrigation water. …
Effects Of Bending And Re-Bending On Mechanical Properties Of Locally-Manufactured Steel Rebars, Patrick W. Waruhiu, Simon I. Marandu, Mussa I. Mgwatu
Effects Of Bending And Re-Bending On Mechanical Properties Of Locally-Manufactured Steel Rebars, Patrick W. Waruhiu, Simon I. Marandu, Mussa I. Mgwatu
Tanzania Journal of Science
Steel rebars experience deformation when subjected to bending and re-bending operations. Subsequently, their microstructures are impaired thus affecting the mechanical properties and leading to failure. This study establishes the effects of bending and re-bending the steel rebars on the mechanical properties. Experiments were conducted to determine the effects of bending and re-bending of the steel rebars. Testing was conducted on Ten virgin and Thirty specimens which were bent and re-bent at 45º, 90º, and 180º, and followed by tensile tests. Yield strength, ultimate tensile strength, elongation, and ultimate tensile strength to yield strength ratio (Rm/Re), were recorded. Results showed the …
Modelling The Combined Use Of Long-Lasting Insecticidal Nets And Insecticides Zooprophylaxis Against The Resilience Of Anopheles Arabiensis For Effective Malaria Control, Watson Levens
Tanzania Journal of Science
Malaria is a significant public health concern, especially in tropical regions. It remains endemic in many areas where malaria mosquitoes are prevalent. This study investigates the viability of insecticide zooprophylaxis (IZ) in conjunction with Long Lasting Insecticidal Nets (LLINs) as a strategic approach to combat malaria transmission, particularly in regions dominated by zoophagic vectors. Through the presentation and analysis of a mathematical model that integrates IZ and LLINs for the control of Anopheles arabiensis (An. arabiensis), the research underscores IZ's role in reducing zoophagic vector populations and enhancing malaria control efforts. Notably, the study reveals that achieving comprehensive coverage of …
Green And Blue Water Footprints Of Major Crops In The Wami/Ruvu Basin, Tanzania: Implications For Water Scarcity And Sustainability, Benson Hm Lazaro, Martine M. Hagai, Rubhera Ram Mato
Green And Blue Water Footprints Of Major Crops In The Wami/Ruvu Basin, Tanzania: Implications For Water Scarcity And Sustainability, Benson Hm Lazaro, Martine M. Hagai, Rubhera Ram Mato
Tanzania Journal of Science
Accurate estimation of the blue and green water requirements of the various crops cultivated in a water basin is essential for planning specific plant/crop irrigation schedules. In this study, the crop water requirements of the major crops grown in the Wami/Ruvu basin were determined using the FAO-CROPWAT model based on meteorological parameters: monthly maximum and minimum temperature, wind speed, mean relative humidity, sunshine hours, rainfall data, and effective rainfall for 23 hydro-meteorological stations distributed in the study area. The studied crops are rice, maize, beans, tomatoes, and sugarcane. The crop reference evapotranspiration (ETo) and actual evapotranspiration (ETc) for each crop …
Modelling And Mapping Of Forest Biodiversity Indicators Using Sentinel-2 And Planetscope Remotely Sensed Data, Diana L. Tesha, Ernest W. Mauya, Sami D. Madundo
Modelling And Mapping Of Forest Biodiversity Indicators Using Sentinel-2 And Planetscope Remotely Sensed Data, Diana L. Tesha, Ernest W. Mauya, Sami D. Madundo
Tanzania Journal of Science
Tropical montane forests harbour exceptionally high biodiversity yet face severe threats from human activities. Assessing forest biodiversity over large areas is crucial yet extremely challenging. Remote sensing provides an efficient monitoring solution, but few studies have focused on Tanzania's diverse, montane forests. We collected field data on tree species composition within 159 plots across montane forests in Tanzania's West Usambara region. We calculated species richness, evenness, and Shannon diversity index as indicators of tree diversity. Using Sentinel-2 and PlanetScope satellite imagery, we derived spectral, textural, and vegetation index predictors to model these indices via generalized additive models and extreme gradient …
Molecular Characterisation Of Traditional Cashew (Anacardium Occidentale L.) Populations From Nachingwea And Newala Districts In Tanzania, Hussein R. Chiumbi, Hashim M. Mangosongo
Molecular Characterisation Of Traditional Cashew (Anacardium Occidentale L.) Populations From Nachingwea And Newala Districts In Tanzania, Hussein R. Chiumbi, Hashim M. Mangosongo
Tanzania Journal of Science
This study assessed the genetic diversity of 120 selected cashew plants from Nachingwea and Newala traditional cashew populations, comprising of 60 cashew plants from each population. Eight Simple Sequence Repeats (SSR) makers were used to ascertain the extent of genetic variation within and between the two traditional cashew populations. Genomic DNA extraction and Polymerase Chain Reaction (PCR) were performed using standard protocols. The results showed that all SSR markers were polymorphic. Average Polymorphic Information Content (PIC), heterozygosity, number of alleles per locus, allelic frequency and Shannon’s Index were 0.540, 0.721, 3.391, 0.666 and 0.649, respectively. Analysis of molecular variance results …
Microbial Quality Of Fresh Juices Sold By Street Vendors And Associated Human Health Risks: The Case Of Ilala Ward, Dar Es Salaam City, Tanzania, Juliana I. Rubaratuka, Godwill D. Mrema, Thomas J. Lyimo
Microbial Quality Of Fresh Juices Sold By Street Vendors And Associated Human Health Risks: The Case Of Ilala Ward, Dar Es Salaam City, Tanzania, Juliana I. Rubaratuka, Godwill D. Mrema, Thomas J. Lyimo
Tanzania Journal of Science
Microbial food quality serves to indicate health risks associated with the consumption of contaminated foods. This study aimed to determine the microbial quality of fresh juices and the level of awareness and perception of the consumers and juice vendors at Ilala Ward, Dar es Salaam. Fresh samples of sugarcane, mango and mixed fruit juices were collected from four different sampling stations and analysed using standard methods for Total Coliform (TC), Faecal Coliform (FC) and Total Viable Count (TVC). The level of awareness and perception of 60 juice vendors and 60 consumers were also assessed by using questionnaires. The results showed …
Population Genetic Structure And Demographic History Of Opsaridium Microcephulum Along Lake Nyasa, Alex Nehemia, Alinanuswe J. Mwakalesi
Population Genetic Structure And Demographic History Of Opsaridium Microcephulum Along Lake Nyasa, Alex Nehemia, Alinanuswe J. Mwakalesi
Tanzania Journal of Science
The Sanjika, Opsaridium microcephalum is among the fish species that serve as a major source of proteins and income to people along Lake Nyasa. However, the information on its genetic diversity and structure particularly in the Tanzania part of the Lake is limited. Therefore, the assessment of the genetic diversity and structure of O.microcephalum along the Lake Nyasa part of Tanzania was conducted in the current study using a fragment of the mitochondrial COI gene from 92 individuals of O. microcephalum. The findings showed that an average haplotype diversity and average nucleotide diversity were 0.8065 ± 0.0314 and 0.002380 ± …
Effect Of Substrate Temperature And Deposition Power On The Surface Morphology And Optical Properties Of Zno:Mg Thin Films Deposited By Dc Magnetron Sputtering, Saidi Saidi, Margaret E. Samiji, Nuru R. Mlyuka
Effect Of Substrate Temperature And Deposition Power On The Surface Morphology And Optical Properties Of Zno:Mg Thin Films Deposited By Dc Magnetron Sputtering, Saidi Saidi, Margaret E. Samiji, Nuru R. Mlyuka
Tanzania Journal of Science
Magnesium doped zinc oxide (ZnO:Mg) thin films were deposited on soda lime glass slides by DC magnetron sputtering method. Atomic force microscope (AFM), and UV/VIS spectrophotometer were used to investigate the effect of sputtering power and substrate temperature on the surface morphology and optical properties of ZnO:Mg thin films. AFM images revealed that sputtering power and deposition temperature have significant influence on surface morphology of the ZnO:Mg thin films. For all sputtering powers and substrate temperatures investigated, ZnO:Mg films had peak transmittance above 85%. Samples deposited at 110 W sputtering power and 450 °C substrate temperature showed the best peak …
Heavy Metals Analysis And Physicochemical Characterization Of Groundwater At A Battery Recycling Site In South-Western Nigeria, Adeniyi T. Adeleke, Rasaki K. Odunaike, Shamsideen K. Alausa, Idris O. Olayiwola, Adetoro T. Talabi, Qasim A. Adeniji, Adejumobi C. Adeniyi
Heavy Metals Analysis And Physicochemical Characterization Of Groundwater At A Battery Recycling Site In South-Western Nigeria, Adeniyi T. Adeleke, Rasaki K. Odunaike, Shamsideen K. Alausa, Idris O. Olayiwola, Adetoro T. Talabi, Qasim A. Adeniji, Adejumobi C. Adeniyi
Tanzania Journal of Science
Indiscriminate dumping of battery waste is a huge issue that endangers human health and the environment. This study aimed at analysing the health impacts of exposure to pollution from spent battery recycling in Ogun State, which houses a diverse range of battery recycling industries. At this study site, forty water samples were studied over the Wet and Dry seasons to assess the impact of battery recycling waste on groundwater. Except for the TSS, the physiochemical parameters of the groundwater vary with season and are within the permissible limits. The electrical conductivity (EC), turbidity, Phosphorus, Biochemical oxygen demand (BOD), Dissolve oxygen …
Evaluation Of The Modulatory Effects Of Capsicum Chinensis Methanol Extract In Streptozotocin-Induced Diabetic Neuropathic Pain In Mice, Babatunde A. Alabi, Adeyinka Aderonmu, Sodiq K. Lawal, Okot-Asi T. Nku-Ekpang, Mayowa Ajayi, Olugbenga E. Iwalewa
Evaluation Of The Modulatory Effects Of Capsicum Chinensis Methanol Extract In Streptozotocin-Induced Diabetic Neuropathic Pain In Mice, Babatunde A. Alabi, Adeyinka Aderonmu, Sodiq K. Lawal, Okot-Asi T. Nku-Ekpang, Mayowa Ajayi, Olugbenga E. Iwalewa
Tanzania Journal of Science
Diabetes is one of the common causes of neuropathic pain. The first-line treatment drugs used in alleviating neuropathic pain can cause adverse effects. Therefore, the aim of this study is to evaluate the analgesic property of Capsicum chinensis, since the plant was reported to be used against chronic pain in traditional medicine. Streptozotocin-induced diabetes was adopted to model neuropathy in mice and the antihyperalgesic effect of the extract was evaluated using a hot plate test, cold allodynia test, and Randall- Selitto paw pressure test. The plasma level of pain-associated inflammatory biomarkers like interleukin-6 (IL-6) and tissue necrotic factor-α (TNF-α) was …
Application Of Remote Sensing And Spectroradiometry In Geological Mapping: A Case Study Of Handeni (Qds 148) Block, Eastern Mozambique Belt, Tanzania, Masota M. Magigita, Elisante Mshiu, Cassy Mtelela
Application Of Remote Sensing And Spectroradiometry In Geological Mapping: A Case Study Of Handeni (Qds 148) Block, Eastern Mozambique Belt, Tanzania, Masota M. Magigita, Elisante Mshiu, Cassy Mtelela
Tanzania Journal of Science
This study applies remote sensing (RS) as a geologic mapping aid tool , using Handeni Block of Tanzania as a case study. To achieve the objective of this study, we have utilized various RS processing and image enhancement techniques on multispectral data, including ASTER, Landsat 5, Landsat 8, and Sentinel 2A. The method proved successful whereby both Landsat-5-data with band combination (BC) 7:4:2 and 7:5:4 and band ratio (BR) 5/3:5/1:7/5 and Landsat-8 data with BCs 5:6:7 and 7:6:4 mapped out marble units. Sentinel 2A data (with BC 8:11:3, BRs 12/2:11/2:8/11; 12/4:11/3:11/2 and 12/4:12/2:11/3) together with image enhancement decorrelation stretch on …
Micro Machining Of A Si3n4/Sio2/Ti/Pt Hotplate And Its Ir Emissivity Properties, Egidius R. Rwenyagila
Micro Machining Of A Si3n4/Sio2/Ti/Pt Hotplate And Its Ir Emissivity Properties, Egidius R. Rwenyagila
Tanzania Journal of Science
This paper presents the fabrication processes for a Si3N4/SiO2/Ti/Pt membrane based micro hotplate (MHP) using photolithography (PL) micro-machining techniques. The properties of the MHP filament are investigated and overall performance characteristics with regard to infrared (IR) radiation emissivity, resistance, breakdown voltage, and temperature of the fabricated Si3N4/SiO2/Ti/Pt micro heater. During characterization, the results show the device breakdown voltage of 24.24 V corresponding to the optimum operation temperature of ~ 1730.30 K. The device also showed an emissivity value of 5.2% with ~ 7% efficiency of transforming electrical power to IR thermal radiation power. The relationship between temperature and resistance, behaviour …
Woody Plant Assemblages Of Recently Declared Village Land Forest Reserve In The Eastern Afromontane Biodiversity Hotspot, Samora Macrice Andrew
Woody Plant Assemblages Of Recently Declared Village Land Forest Reserve In The Eastern Afromontane Biodiversity Hotspot, Samora Macrice Andrew
Tanzania Journal of Science
Understanding of species composition of village land forest reserves and their driving factors informs adequate development of effective restoration strategies and sustainable forest management of miombo woodlands. This study assessed the effects of human disturbance as well as environmental variables on woody plant species composition using 24 square plots of 10 x 10 m in a recently declared village land forest reserve in the Eastern Afromontane biodiversity hotspot of Tanzania. Ordination analysis technique canonical correspondence analysis was used to identify important vegetation gradients and significant factors that explain the spatial variation in species composition of woody plants. Results showed that, …
Preparation Of 2d Tungsten Diselenide (Wse2) Thin Films By Selenization Of Dc-Sputtered W Precursors, Lwitiko P. Mwakyusa
Preparation Of 2d Tungsten Diselenide (Wse2) Thin Films By Selenization Of Dc-Sputtered W Precursors, Lwitiko P. Mwakyusa
Tanzania Journal of Science
Two-dimensional layered transition metal dichalcogenides based on WSe2 films demonstrated promising properties for nano-electronics and photovoltaic applications. In this work, WSe2 films were prepared by selenization of DC-sputtered W precursors. The influence of the selenization temperature on the structural, morphology, and optical properties of the WSe2 films was investigated. The selenization temperature was varied from 350 °C to 450 °C at the interval of 50 °C. Structural, morphology and optical properties of the WSe2 were investigated using X-ray diffractometry (XRD), Atomic Force Microscope (AFM), and UV-VIS-NIR spectrophotometer, respectively. XRD analysis revealed that all WSe2 were polycrystalline and exhibited the co-existence …
Woody Species Composition, Structure, Regeneration Status And Carbon Storage Of Mkulazi Forest Reserve In Tanzania, Ezekiel E. Mwakalukwa, Christoganus John, Paulo J. Lyimo
Woody Species Composition, Structure, Regeneration Status And Carbon Storage Of Mkulazi Forest Reserve In Tanzania, Ezekiel E. Mwakalukwa, Christoganus John, Paulo J. Lyimo
Tanzania Journal of Science
Little is known about the status of forest condition and carbon storage potential of Mkulazi forest reserve (MFR) located in Morogoro District, Tanzania. This study was conducted to assess i) woody species composition, richness and diversity, ii) stand structure, iii) regeneration status and iv) carbon storage. Data collection for vegetation involved establishment of 100 concentric circular sample plots in the forest area of 65,710 ha. A total of 54 plant species for trees and shrubs with DBH ≥ 5 cm that belongs to 20 plant families were identified. The diversity of woody species was high (H’ = 3.11), while Stem …
Quantifying The Strength Of The El Niño Southern Oscillation And The Indian Ocean Dipole In Influencing The Ond Rainfall Season In Tanzania, Benjamin William Ongito, Paul T.S. Limbu
Quantifying The Strength Of The El Niño Southern Oscillation And The Indian Ocean Dipole In Influencing The Ond Rainfall Season In Tanzania, Benjamin William Ongito, Paul T.S. Limbu
Tanzania Journal of Science
The current paper examines the strength of variability between the El Niño-Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) in influencing October to December (OND) rainfall over the bimodal rainfall regime of Tanzania. The empirical orthogonal function (EOF), correlation analysis, and composite analysis were used during the data analysis. The results show more rainfall distribution over the western part of the Lake Victoria basin and to the peripheral of the northern coast of the country, thus suggesting that, during the OND rainfall season, the onset starts in the western part of the Lake Victoria basin, then spreads to the …
Gene Flow Between The Wild Rice Species (Oryza Longistaminata) And Two Varieties Of Cultivated Rice (Oryza Sativa) In Kilombero District, Tanzania, Hashim M. Mangosongo, Emmarold E. Mneney, Bramwel Wanjala
Gene Flow Between The Wild Rice Species (Oryza Longistaminata) And Two Varieties Of Cultivated Rice (Oryza Sativa) In Kilombero District, Tanzania, Hashim M. Mangosongo, Emmarold E. Mneney, Bramwel Wanjala
Tanzania Journal of Science
The direction and rate of gene flow between the perennial wild rice species, O. longistaminata and cultivated rice, O. sativa was investigated using nine Microsatellite (SSR) markers. The study involved characterization of parental lines of two cultivated rice varieties and O. longistaminata and their F1 progenies. Presence of crop-specific alleles in the wild species or vice-versa was used as an indicator of occurrence of gene flow between the two species. The study revealed that gene flow between O. longistaminata and each of the two varieties of O. sativa occurs naturally. The direction of gene flow was mainly from the cultivated …
Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu
Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu
Tanzania Journal of Science
In Tanzania, low tomato (Solanum lycopersicum) yield and postharvest marketable fruit qualities remain significant limitations for tomato grower’s profit. Seven endophytic fungal isolates from pyrethrum and Lemongrass leaf and or flowers were evaluated to promote tomato productivity and fruit qualities. The isolates were inoculated by priming the seeds in spore suspension, and the variations in the number of germinated seeds, seedling vigour, yield and fruit qualities were compared across the treatments. It was observed that only three isolates induced more than 50% seed germination. Epf1 and Epl1 isolates showed significant promotion of seed germination (F 0.05 (pdf, 23) = 8.121 …
Modelling Spatial Distributions Of Sediments Fingerprinting In The Ruvu Basin Of Tanzania Without Continuous Sediment Monitoring, Charles H. Kasanzu
Modelling Spatial Distributions Of Sediments Fingerprinting In The Ruvu Basin Of Tanzania Without Continuous Sediment Monitoring, Charles H. Kasanzu
Tanzania Journal of Science
This study investigates various hinterlands’ contribution of sediments into the sub-basin known as Ruvu that comprises Mindu, Kibungo, Mvuha and Mindu catchments of Morogoro, Eastern Tanzania. An integrated geochemical and isotopic data were used to constrain this. Strategic sampling of basement and silty-sized sediments was conducted and the data were modelled using mass-balance computations. This approach revealed that, more than 70% of suspended sediments in the Mgeta River originate from Kigalamila, Sezima, Kingule, Mafumbo and Kibuko areas. Thus, hills north of Kisaki are major contributors of sediments with less contribution from the southern terrain. After modelling of the data from …
Turmeric Dyeing Of Cotton Fabrics Using Tie-Dyeing Techniques, Pendo Bigambo, Happiness Wellah, Hadija Ngaga, Safina Kimbokota, Mbonea Mrango
Turmeric Dyeing Of Cotton Fabrics Using Tie-Dyeing Techniques, Pendo Bigambo, Happiness Wellah, Hadija Ngaga, Safina Kimbokota, Mbonea Mrango
Tanzania Journal of Science
Tie-dyeing is a resist-dyeing technique which for years has been used by SMEs to produce attractive textile fabrics. However, the technique is challenged by the use of synthetic dyes which are not environmentally friendly and the growing consumers’ environmental awareness. Accordingly, researchers and industrialists are forced to explore the alternative natural dyes in response to the above challenges. Among the natural source of dyes available abundantly in Tanzania, but are yet to be fully exploited for applications via tie-dyeing technique are turmeric (Curcuma longa L.) roots commonly used for food coloring. In this study turmeric roots were investigated for their …
Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu
Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu
Tanzania Journal of Science
In Tanzania, low tomato (Solanum lycopersicum) yield and postharvest marketable fruit qualities remain significant limitations for tomato grower’s profit. Seven endophytic fungal isolates from pyrethrum and Lemongrass leaf and or flowers were evaluated to promote tomato productivity and fruit qualities. The isolates were inoculated by priming the seeds in spore suspension, and the variations in the number of germinated seeds, seedling vigour, yield and fruit qualities were compared across the treatments. It was observed that only three isolates induced more than 50% seed germination. Epf1 and Epl1 isolates showed significant promotion of seed germination (F 0.05 (pdf, 23) = 8.121 …
Synthesis Of Template-Free Flower-Like Zno Nanorods Using A Simple Chemical Bath Technique, Benard S. Mwankemwa
Synthesis Of Template-Free Flower-Like Zno Nanorods Using A Simple Chemical Bath Technique, Benard S. Mwankemwa
Tanzania Journal of Science
Flower-like ZnO nanorods were successfully synthesised using a template-free, low-temperature chemical bath deposition method. The effects of growth time on the structural, morphological, and vibrational properties of flower-like zinc oxide were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that the crystallite size and density of flower-like ZnO nanorods increased with increasing growth time. Raman spectroscopy confirmed the existence of specific Raman modes that correspond to the wurtzite structure of ZnO. In addition, Raman measurements revealed that increased growth time increases the Raman modes intensity of the flower-like ZnO nanorods. Moreover, the measurements of the Au/ZnO nanorods/FTO Schottky …