Browsing Materials, Energy, Water and Environmental Sciences by Title
Now showing items 486-505 of 579
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Sources of Nitrate in Ground Water Aquifers of the Semiarid Region of Tanzania
(Hindawi, 2021)Nitrate isotopic values are often used as a tool to identify sources of nitrate in order to effectively manage ground water quality. In this study, the concentrations of NO3−, NO2−, and NH4+ from 50 boreholes and shallow ... -
Spatial Distribution of Soil Hydrological Properties in the Kilombero Floodplain, Tanzania
(MDPI, 2017-11-30)Analysis and interpretation of soil properties dynamics is a keystone in understanding the hydrologic responses and yield potential of floodplain wetlands. This study characterizes the distribution and spatial trends of ... -
Statistics in Climate Variability, Dry Spells, and Implications for Local Livelihoods in Semiarid Regions of Tanzania: The Way Forward
(Springer Nature Switzerland AG., 2016-10-13)The Dodoma municipality, a semiarid region of Tanzania, is characterized by limited rains, lack of surface water sources, and a high frequency of extreme climate events, particularly droughts and floods. These disadvantaged ... -
Status of Biomass Derived Carbon Materials for Supercapacitor Application
(Hindawi, 2017-01-31)Environmental concerns and energy security uncertainties associated with fossil fuels have driven the world to shift to renewable energy sources. However, most renewable energy sources with exception of hydropower are ... -
Storage and thermal stability of biodiesel produced from manketti nut oil of Southern Africa origin with the infuence of metal contaminants and antioxidants
(Springer Nature Switzerland AG., 2020-04-20)Biodiesel has widely been produced from common edible oils; however, food versus fuel conficts has motivated researchers to search for other less common feedstock for production of biodiesel. Thus, this study investigates ... -
Strategies to improve anaerobic digestion and environ-economic analysis of municipal solid wastes management options
(NM-AIST, 2021-06)Different strategies have widely been applied for improving the anaerobic digestion of the organic fraction of municipal solid wastes. However, because of the heterogeneous compositions of organic fraction of municipal ... -
Strength and durability properties of concrete blended with pumice and scoria under combined attack of sulphate and chloride
(NM-AIST, 2021-11)Concrete structures suffer serious deterioration under corrosive environment. Consequently, the safety of these concrete structures is decreased. The influence of natural pumice (NP) and natural scoria (NS) as supplementing ... -
Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material
(Hindawi, 2021-05-24)Concrete structures suffer serious deterioration under a corrosive environment. Consequently, the service life of these concrete structures is decreased and deteriorates under combined attack of sulphate and chlorides. ... -
Striding towards self-sustainability using aluminium from Tanzanian Kaolin for combination tanning system
(Dresden-Germany, 2019)Sustainability is a key factor which controls future leather manufacture. Developing several new technologies is one of the primary agendas for sustainability. However, developing countries are facing several challenges ... -
Structural and biophysical characterization of cassava linamarase and the role of solvents on linamarin’s properties: a computational study
(NM-AIST, 2022-06)Linamarase and linamarin mainly from cassava have many applications ranging from food, environmental to the medical industry. To better explore the potential of this enzyme and its substrate, one needs to understand ... -
Structural and thermodynamic characteristics of ionic associates in vapors over sodium bromide and iodide
(Nature Switzerland AG., 2010-05-16)Nonempirical methods are used to calculate the geometric parameters, the frequencies of normal vibrations, and thermochemical characteristics of ions existing in saturated vapors over sodium bromide and iodide: Na2X+, NaX ... -
Structural characterization of cassava linamarase-linamarin enzyme complex: an integrated computational approach
(Taylor & Francis Group, 2021-05-21)Cassava linamarase is a hydrolyzing enzyme that belongs to a glycoside hydrolase family 1 (GH1). It is responsible for breaking down linamarin to toxic cyanide. The enzyme provides a defensive mechanism for plants against ... -
Structural characterization of cassava linamarase-linamarin enzyme complex: an integrated computational approach
(Journal of Biomolecular Structure and Dynamics, 2022)Cassava linamarase is a hydrolyzing enzyme that belongs to a glycoside hydrolase family 1 (GH1). It is responsible for breaking down linamarin to toxic cyanide. The enzyme provides a defensive mechanism for plants against ... -
Structure and properties of molecular and ionic clusters in vapour over caesium fluoride
(Taylor & Francis Online, 2015-02-11)The properties of neutral molecules Cs2F2, Cs3F3, and Cs4F4, and positive and negative cluster ions Cs2F+, CsF2−, Cs3F2+, Cs2F3−, Cs4F3+, and Cs5F4+ were studied by several of quantum chemical methods implementing density ... -
Structure and thermodynamic properties of positive and negative cluster ions in saturated vapour over barium dichloride
(Taylor & Francis online, 2013-03-13)Geometrical structure, vibration spectra, and enthalpies of dissociation have been investigated for the ions BaCl3−, Ba2Cl3+, Ba3Cl5+, and Ba4Cl7+ which were detected earlier in the saturated vapour over BaCl2. Quantum ... -
Structure and vibrational spectra of cluster ions over rubidium iodide by computational chemistry
(IEEE, 2015-03-05)The properties of Rb 2 I + , RbI 2 - , Rb 3 I 2 + and Rb 2 I 3 - ions were studied using two quantum chemical methods, DFT and Møller-Plesset perturbation theory of the 2 nd order. The effective core potential with Def2-QZVP ... -
Study of crustacean biomass wastes for water defluoridation
(NM-AIST, 2018-09)High levels of fluoride (F-) in community drinking water supply is recognized as one of the major public health problems. Until now no efficient and affordable F- removal technology exists in many regions. This research ... -
Study of interaction of chitosan with Fluoride
(Biointerface Research in Applied Chemistry, 2018-06-15)Interaction of chitosan with fluoride (F- ) has been studied using experimental and computational methods. Chitosan was extracted from prawns shells and modified by cross-linking with glutaraldehyde and protonation using ... -
A study on Pb removal kinetics using modified agricultural wastes from Tanzania
(Springer Nature Switzerland AG., 2020-10-29)Lignocellulosic materials, abundant and renewable materials, are gaining popularity as metal scavenging agents because of their high sorption capacities, relatively low cost and environmental-friendliness. However, there ... -
Sub- and Supercritical Water Gasification of Rice Husk: Parametric Optimization Using the I-Optimality Criterion.
(ACS Publications, 2021-05-18)In this study, rice husk biomass was gasified under sub- and supercritical water conditions in an autoclave reactor. The effect of temperature (350-500 °C), residence time (30-120 min), and feed concentration (3-10 wt %) ...