Browsing Research Articles [MEWES] by Title
Now showing items 186-205 of 476
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Gaseous complex hydrides NaMH and NaMH (M = B, Al) as hydrogen storage materials: a quantum chemical study.
(Springer Nature Switzerland AG., 2020-12-17)Metal hydrides are feasible for energy storage applications as they are able to decompose with hydrogen gas release. In this work, gaseous complex sodium hydrides, NaMH and NaMH (M = B or Al), have been investigated using ... -
Geochemical Distribution of Trace Elements in Groundwater from the North Mara Large-Scale Gold Mining Area of Tanzania
(Ground Water Monitoring and Remediation, 2016-05)The infl uence of large-scale mining operations on groundwater quality was investigated in this study. Trace element concentrations in groundwater samples from the North Mara mining area of northern Tanzania were analyzed. ... -
Geochemistry of Potentially Toxic Elements in Soil and Sediments of a Tanzanian Small-Scale Gold Mining Area
(scientific research publishing, 2023-11-17)Small-scale gold mining is linked to significant environmental pollution by potentially toxic elements (PTEs). However, research on the pollution caused by such mining activities remains insufficient especially in ... -
Geometrical Structure, Vibrational Spectra and Thermodynamic Properties of Chitosan Constituents by DFT Method
(Science Publishing Group, 2014-08-10)The interaction between glucosamine molecules has been studied theoretically. The geometrical structures of monomer (A), dimer (AA) and trimer (AAA) molecules of glucosamine were optimized and vibrational spectra were ... -
Growth, mortality, exploitation rate and recruitment pattern of Octopus cyanea (Mollusca: Cephalopoda) in the WIO region: A case study from the Mafia Archipelago, Tanzania
(Western Indian Ocean Journal of Marine Science, 2021-08-24)Octopus cyanea is a commercially important cephalopod in the Western Indian Ocean (WIO) region, but scientific information to inform management strategies for the species is limited. A study was conducted in 2014, 2015, ... -
Guanidinium tin halide perovskites: structural, electronic, and thermodynamic properties by quantum chemical study
(Springer Nature Switzerland AG., 2021-04-17)The orthorhombic phase of guanidinium tin halide perovskites C(NH2)3SnX3, X = Cl, Br, I has been studied by quantum chemical method. The lattice parameters are optimized to obtain the minimum energy using the density ... -
Harmful algal bloom and associated health risks among users of Lake Victoria freshwater: Ukerewe Island, Tanzania
(J Water Health, 2019-07-24)There is a global concern regarding the occurrences of harmful algal blooms (HABs) and their effects on human health. Lake Victoria (LV) has been reported to face eutrophication challenges, resulting in an increase of ... -
Health Risk Assessment of Trace Elements in Soil for People Living and Working in a Mining Area
(Hindawi, 2021-07-02)The present study used soils collected from a small-scale gold mine area to determine the health risks due to trace elements to the at-risk population in the study area. The work involved 74 soil samples from four sampling ... -
Heavy Metals Contamination in Agricultural Soil and Rice in Tanzania: A Review
(Science Publishing Group, 2016-02-17)Heavy metals contamination in agricultural soil is a potential environmental threat to the safety of agricultural food crops such as rice which is consumed by majority of Tanzanians. The aim of this review is to put ... -
Heavy metals risk assessment of water and sediments collected from selected river tributaries of the Mara River in Tanzania
(Springer Nature, 2021-06-25)This study investigated the levels of Pb, Hg, Cr, Cd, and As in water and sediments from the tributaries of the Mara River, Tanzania. Pollution risk of water and sediments was investigated using seven indices and fve ... -
High energy density materials based on fluorinated bridged trinitromethyl azo triazole derivatives: a quantum chemical study of thermodynamic and energetic properties
(Springer Nature Switzerland AG., 2020-10-19)High energy density materials (HEDM) have gained extensive attention due to their energetic properties and safety issues. Nitro and fluoro groups, among others, have become viable substituents on the triazole framework ... -
High-frequency dynamics of pH, dissolved oxygen, and temperature in the coastal ecosystems of the Tanga- Pemba Seascape: implications for upwelling-enhanced ocean acidification and deoxygenation
(Frontiers, 2024-01-08)Ocean acidification, deoxygenation, and warming are three interconnected global change challenges caused by increased anthropogenic carbon emissions. These issues present substantial threats to marine organisms, ecosystems, ... -
Highly porous biomass-based capacitive deionization electrodes for water defluoridation
(Springer Nature Switzerland AG., 2019-12-09)The high concentration of fluoride (F−) in water sources is the main challenge in major fluoride belts. Though capacitive deionization (CDI) with porous carbon electrodes is the promising alternative in removing charged ... -
Household food insecurity and gender inequity is associated with high prevalence of maternal depression amongst female farmers with young children in rural Tanzania
(The Federation of American Societies for Experimental Biology, 2018-10-03)There is growing recognition of the importance of maternal mental health for the well-being of both mothers and children. In addition to being of importance to public health concern on its own right, maternal depression ... -
How Can We Represent Seasonal Land Use Dynamics in SWAT and SWAT+ Models for African Cultivated Catchments?
(MDPI, 2020-05-28)In SWAT and SWAT+ models, the variations in hydrological processes are represented by Hydrological Response Units (HRUs). In the default models, agricultural land cover is represented by a single growing cycle. However, ... -
Hybrid CV-CC operation of capacitive deionization in comparison with constant current and constant voltage
(Taylor & Francis Online, 2016-02-24)Capacitive deionization (CDI) is a technique used to desalinate saline water by means of electrical potential applied to the electrode along both sides of a spacer channel through which water flows. CDI operates either at ... -
Hybrid Reverse Osmosis‐Capacitive Deionization versus Two‐Stage Reverse Osmosis: A Comparative Analysis
(John Wiley & Sons, Inc., 2014-06-06)Reverse osmosis (RO) is a high‐pressure single‐phase desalination process used to obtain freshwater from seawater/brackish water. The RO system shows high energy consumption for a given unit volume of pure water produced. ... -
Hydrogen sulfide and ammonia removal from biogas using water hyacinth-derived carbon nanomaterials
(Academic Journals, 2017-07-31)The presence of hydrogen sulfide (H2S) and ammonia (NH3) in biogas pose serious human health and environmental challenges. In this study, H2S and NH3 were successfully removed from biogas using water hyacinth-derived ... -
Hydrogeochemical characteristics and spatial distribution of groundwater quality in Arusha well fields, Northern Tanzania
(Springer, 2018-07-09)Arusha aquifers have been exploited intensively serving as the main source of domestic water supply in the city. But the quality of groundwater is not clearly documented for future planning and management. Hydrogeochemical ... -
Hydrogeochemical similarities and groundwater-surface water interactions for the karst hydrological system of northwest Rwanda
(Springer International Publishing, 2023-08)The groundwater of karst environments is vulnerable to pollution due to its heterogeneous nature and can be completely depleted due to its strong connection to surface water when predominantly driven by natural and ...
