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Microbiological, Physicochemical And Heavy Metals Assessments Of Soils And Selected Vegetables Grown On Rumde-Doubeli Irrigated Farmland In Yola Nigeria, Mohammed Inuwa Ja’Afaru, Joel Uyi Ewansiha, Abdulwahab Dahiru, Konjerimam Ishaku Chimbekujwo
Microbiological, Physicochemical And Heavy Metals Assessments Of Soils And Selected Vegetables Grown On Rumde-Doubeli Irrigated Farmland In Yola Nigeria, Mohammed Inuwa Ja’Afaru, Joel Uyi Ewansiha, Abdulwahab Dahiru, Konjerimam Ishaku Chimbekujwo
Tanzania Journal of Science
Leaf parts of vegetable plants grown on irrigated farmlands and are easily accessed by contaminants; pose greater risks of being contaminated with heavy metals. Soil, irrigation water and edible vegetable plants were collected and evaluated for concentrations of heavy metals using Atomic Absorption Spectrophotometry (AAS) and standard laboratory methods. Physicochemical parameters of irrigation water, compared with WHO limits for chloride (326.14 + 7.03 mg/L, 250 mg/L), total hardness (196.0 + 8.72 mg/L, 150 mg/L), chemical oxygen demand (286.4 ±1.35 mg/L; 150 mg/L) and alkalinity (171.0 + 4.36 mg/L, 120 mg/L) were significantly (p ˂ 0.05) higher than the control sites …
Geological And Geochemical Characterisation Of Pegmatites Around Olode, Southwestern Nigeria, Razak O. Jimoh, Akinade S. Olatunji
Geological And Geochemical Characterisation Of Pegmatites Around Olode, Southwestern Nigeria, Razak O. Jimoh, Akinade S. Olatunji
Tanzania Journal of Science
Olode is prolific in terms of pegmatites, occurring in different ways as large intrusive bodies, as veins and dykes, discordantly intruding the host rocks of mica schist, gneiss and granite. This study is aimed at the geological and geochemical characterisation of pegmatites around Olode. Field investigation was undertaken to determine the occurrences and relationships of the pegmatites with the host rocks. Fresh pegmatite samples were studied petrographically and geochemically. Two main lithologically and chronologically different groups of pegmatites were distinguishable in the study area. These were the tourmaline pegmatites associated with the Older Granite rocks and the NE-SW trending beryl-bearing …
Trypsin Immobilization On Thiol Functionalized Mesoporous Silicas Prepared Using Castor Oil Template, James E. Mgaya
Trypsin Immobilization On Thiol Functionalized Mesoporous Silicas Prepared Using Castor Oil Template, James E. Mgaya
Tanzania Journal of Science
Mesoporous thiol modified silicas have been prepared using castor oil as a templating agent. The preparation was done through a co-condensation of 3-mercaptopropyltriethoxysilane and tetraethylorthosilicate in a 1:4 molar ratio. Physisorption studies showed that the prepared mesoporous silicas have an average pore diameter of 9 nm, pore volume of 1.0336 cm3/g and surface areas of up to 605 m2/g. FTIR confirmed the attachment of thiol groups on the surface of the prepared mesoporous silica as evidenced with an absorption band at around 2600 cm–1. SEM images indicated agglomeration of the prepared particles. The prepared thiol modified silicas were successfully immobilized …
Cashew Plant-Mediated Biosynthesis Of Silver Nanoparticles And Evaluation Of Their Applications As Antimicrobial Additive For Consumer Care Products, Isiaka A. Adelere, David O. Aboyeji, Felicia O. Akindurodoye, Nasiru U. Adabara, Hausatu Babayi
Cashew Plant-Mediated Biosynthesis Of Silver Nanoparticles And Evaluation Of Their Applications As Antimicrobial Additive For Consumer Care Products, Isiaka A. Adelere, David O. Aboyeji, Felicia O. Akindurodoye, Nasiru U. Adabara, Hausatu Babayi
Tanzania Journal of Science
This study reports the biogenic synthesis of silver nanoparticles (AgNPs) using aqueous extract obtained from Anacardium occidentale stem bark and evaluation of their antibacterial activities as well as their potential applications as antimicrobial additives for detergent and toothpaste. The biosynthesized AgNPs were analyzed using UV–Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The particles were dark brown in colour with maximum absorbance at wavelength 419 nm. They were mainly spherical in shape with size ranges from 20 to 60 nm. The peaks of FTIR spectrum revealed that their formation was facilitated by protein molecules present in the …
Levels And Exposure Risks Of Lead, Arsenic And Mercury From Selected Lipstick And Nail Polish Cosmetics Marketed In Dar Es Salaam, Tanzania, Gerald S. Kulwa, Matobola J Mihale
Levels And Exposure Risks Of Lead, Arsenic And Mercury From Selected Lipstick And Nail Polish Cosmetics Marketed In Dar Es Salaam, Tanzania, Gerald S. Kulwa, Matobola J Mihale
Tanzania Journal of Science
Presence of Pb, As and Hg in selected lipstick and nail polish cosmetics sold at different shopping malls and retail outlets in Dar es Salaam was determined by microwave plasma atomic emission spectrometry due to their public health effects. Pb was detected in 100% (n = 25) of lipsticks and 53.3% (n = 15) of nail polishes. Arsenic was detected in 36% of lipsticks and 86.7% of nail polishes, and Hg was detected in 44% of lipsticks and 80% of nail polishes. All metal levels in both cosmetics were below the World Health Organisation (WHO) and Tanzania Bureau of Standards …
Corn Stover As Substrate For Biogas Generation And Precursor For Biosilica Production Via Anaerobic Digestion, Akinola D. Olugbemide, Lajide Labunmi, Ikhazuagbe H Ifijen, Damilare I. Ogungbemide
Corn Stover As Substrate For Biogas Generation And Precursor For Biosilica Production Via Anaerobic Digestion, Akinola D. Olugbemide, Lajide Labunmi, Ikhazuagbe H Ifijen, Damilare I. Ogungbemide
Tanzania Journal of Science
Production of fuels and chemicals from renewable biomass is crucial to sustainability of bio-based economy. In this study, anaerobic digestion of corn stover (CS) was carried out to produce biogas under mesophilic conditions. The study also investigated the potential of corn stover digestate ash as a potential source for biosilica production. A cumulative volume of 930 mL of biogas was produced with methane content of 85.87%. Higher and lower calorific values of biogas were calculated to be 36.30 MJ/m3 and 32.70 MJ/m3, respectively. Calcination of raw CS (RCS) and the digestate (CSD) was carried out at 600 °C for 3 …
Coal Exploration Using Electrical Resistivity Method In Some Parts Of Benue Trough, Nigeria, Saminu Olatunji, Abdulgafar T. Jimoh
Coal Exploration Using Electrical Resistivity Method In Some Parts Of Benue Trough, Nigeria, Saminu Olatunji, Abdulgafar T. Jimoh
Tanzania Journal of Science
Geoelectrical resistivity sounding technique was used to delineate the occurrence and extents of coal seam. Fifteen points were sounded with Schlumberger configuration in the suspected coal deposit site bounded by longitudes 7.344° E and 7.366° E, and latitudes 7.318° N and 7.33° N. The vertical electrical sounding (VES) data were analyzed and the corresponding geo-electric parameters at various depths were modeled. The earth model within the study area was correlated with available lithology of a nearby mine site. The sounding signatures are KQHK and KHK curve types which revealed five to six distinct geo-electrical equivalent layers. The wet to dry …
Performance Evaluation Of Aspect Dependent-Based Ghost Suppression Methods For Through-The-Wall Radar Imaging, Mugundu Rambika, Abdi T. Abdalla, Baraka J. Maiseli, Alfred J. Mwambela
Performance Evaluation Of Aspect Dependent-Based Ghost Suppression Methods For Through-The-Wall Radar Imaging, Mugundu Rambika, Abdi T. Abdalla, Baraka J. Maiseli, Alfred J. Mwambela
Tanzania Journal of Science
There are many approaches which address multipath ghost challenges in Through-the-Wall Radar Imaging (TWRI) under Compressive Sensing (CS) framework. One of the approaches, which exploits ghosts’ locations in the images, termed as Aspect Dependent (AD), does not require prior knowledge of the reflecting geometry making it superior over multipath exploitation based approaches. However, which method is superior within the AD based category is still unknown. Therefore, their performance comparison becomes inevitable, and hence this paper presents their performance evaluation in view of target reconstruction. At first, the methods were grouped based on how the subarrays were applied: multiple subarray, hybrid …
Radiation Dose To The Contralateral Breast And Effectiveness Of Superflab In Dose Reduction During Treatment Of Breast Cancer By Cobalt-60 External Beam, Julius S. Chiuyo, Peter K. Msaki, Ismail N. Makundi
Radiation Dose To The Contralateral Breast And Effectiveness Of Superflab In Dose Reduction During Treatment Of Breast Cancer By Cobalt-60 External Beam, Julius S. Chiuyo, Peter K. Msaki, Ismail N. Makundi
Tanzania Journal of Science
Radiation therapy for breast cancer inevitably results in scattered dose to contralateral breast. Breast tissues being highly sensitive to ionizing radiations, the chance of the contralateral breast developing second cancer after radiation therapy is high. This study investigated dose to contralateral breast and its reduction by superflab during the course of breast cancer radiation therapy. A thorax breast phantom constructed from tissue-equivalent materials and diodes (type IVD2 1137) were used to measure surface doses to the contralateral breast. The mean doses received by the contralateral breast were 2.2% and 7.1% of the prescribed dose of 200 cGy for 5 × …
Contour Mapping For Rain Rate And Rain Attenuation In Microwave And Millimetre Wave Earth-Satellite Link Design In Tropical Tanzania, Promota Haule Linga, Hashim Uledi Iddi, Mussa Kissaka
Contour Mapping For Rain Rate And Rain Attenuation In Microwave And Millimetre Wave Earth-Satellite Link Design In Tropical Tanzania, Promota Haule Linga, Hashim Uledi Iddi, Mussa Kissaka
Tanzania Journal of Science
Rain rate and rain attenuation predictions are vital in the analysis of the performance of earth-satellite link at higher frequencies beyond 10 GHz for satellite system planning. This study intended to address lack of rain attenuation profile based on local rainfall data collected from various parts of the country. A one-minute integration time rainfall rate used to estimate the rain-induced attenuation was obtained by converting the annual rainfall data collected for 40 years from 22 locations in Tanzania using a combination of Chebil and refined Moupfouma-Martin methods. The International Telecommunication Union (ITU) standard was used to predict attenuation caused by …
Selected Under-Exploited Plant Oils In Nigeria: A Correlative Study Of Their Properties, Ikhazuagbe H. Ifijen, Adachukwu N. Nkwor
Selected Under-Exploited Plant Oils In Nigeria: A Correlative Study Of Their Properties, Ikhazuagbe H. Ifijen, Adachukwu N. Nkwor
Tanzania Journal of Science
This study examined the physicochemical properties of seven under-exploited plant oils in Nigeria, namely; Hevea brasiliensis seed oil (HBSO), Prunus dulcis seed oil (PDSO), Afzelia africana aril cap oil (AAACO), Jatropha curcas seed oil (JCSO), Sesamum indicum seed oil (SISO), Canarium schweinfurthii seed oil (CSSO) and Hura crepitans seed oil (HCSO). Characteristics such as colour, percentage yield, specific gravity, freezing/melting point, acid value, free fatty acid, iodine value, and saponification value were investigated. The results showed that they have different colours and are liquid at room temperature. The percentage yield of the extracted oils varied from 34 to 55.39%. The …
The Geochemical Compositions And Origin Of Sand Dunes In The Olduvai Gorge–Eastern Serengeti Plains, Northern Tanzania, Dalaly Kafumu
The Geochemical Compositions And Origin Of Sand Dunes In The Olduvai Gorge–Eastern Serengeti Plains, Northern Tanzania, Dalaly Kafumu
Tanzania Journal of Science
This paper reports the composition and origin of black sand dunes that occur in the eastern Serengeti plains near the Olduvai Gorge hominid site in Tanzania. Grain size analysis reflected light microscopic examination, and scanning electron microscopy (SEM) analysis identified very fine to coarse sand fraction mineral grains of between 0.065 mm and 1 mm, composed of augite, fassaite and omphacite pyroxenes; garnet and sillimanite silicate mineral grains. The pyroxene minerals (augite, omphacite and fassaite) constitute 95.4% by volume of the sand dunes. The other mineral grains are silicate minerals that include garnet and sillimanite, together form the remaining 4.6% …
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Tanzania Journal of Science
This work examined the effects of land use and cover change on the impervious surface as a measure of urbanisation together with its driving factors such as population growth and economic development. The spatial and temporal variations of the impervious surface area were extracted from the Landsat images of the years 1989, 1995, 2005, and 2015. Data analyses involved the selection of the endmember through Minimum Noise Fraction (MNF) and Linear Spectral Mixed Analysis (LSMA) on the images. Four dominant land cover types were mapped as results, which are forest, non-forest vegetation, bare-land, and built-up area. The non-forest vegetation and …
Geochronology Of Massif-Type Anorthosites From The Ubendian Belt, Tanzania, Nelson Boniface
Geochronology Of Massif-Type Anorthosites From The Ubendian Belt, Tanzania, Nelson Boniface
Tanzania Journal of Science
Massif-type anorthosites occur in East Africa at the margins of the Tanzania Craton in the Ubendian Belt. The massif assemblage constitutes of mafic-composition plutons (meta-anorthosite and meta-gabbro), ultramafic plutons, and titaniferous iron-ore. Silicic ortho-gneisses (tonalitic, dioritic, and granodioritic intrusives) also occur in the vicinity of the said massif-type anorthosites. This article presents ages of meta-anorthosites and meta-gabbros. The new U-Pb zircon age indicates that meta-gabbros and meta-anorthosites crystallized between 1915 ± 24 and 1905 ± 24 Ma concomitantly with the silicic magmatic bodies. Geochronological databases indicate that the period between 1920 and 1850 Ma HP-LT metamorphic interface was formed at …
Analyses Of Land Cover Changes From 1981 To 2016 In Pande Game Reserve, Tanzania, Cosmas Mligo
Analyses Of Land Cover Changes From 1981 To 2016 In Pande Game Reserve, Tanzania, Cosmas Mligo
Tanzania Journal of Science
Pande Game Reserve is among the protected areas in the coast of Tanzania. The reserve is heavily degraded because of illegal anthropogenic disturbances. The patterns of land cover changes which occurred in the reserve between 1981 and 2016 were determined using GIS and remote sensing techniques. Five land cover types, namely woodland, bushland, grassland, natural forest and bare soils were detected. The base map of 1981 indicated natural forest covering 965 ha (63.2%) followed by bushland with an area of 462ha (30%), grassland covering 7% (100 ha) where the woodland and bare soils did not exist in the reserve. The …
Stabilizing Capability Of Gum Arabic On The Synthesis Of Poly(Styrene-Methylmethacrylate-Acrylic Acid) Latex For The Generation Of Colloidal Crystal Films, Ikhazuagbe Ifijen, Stanley Omorogbe, Muniratu Maliki, Ifeanyi Odiachi, Aireguamen Aigbodion, Esther Ikhuoria
Stabilizing Capability Of Gum Arabic On The Synthesis Of Poly(Styrene-Methylmethacrylate-Acrylic Acid) Latex For The Generation Of Colloidal Crystal Films, Ikhazuagbe Ifijen, Stanley Omorogbe, Muniratu Maliki, Ifeanyi Odiachi, Aireguamen Aigbodion, Esther Ikhuoria
Tanzania Journal of Science
This article describes the generation and characterization of colloidal crystals from particles of gum arabic (GA) and sodium dodecylbenzene sulfate (SDBS) emulsified poly(styrene methylmethacrylate-acrylic acid) (P(St-MMA-AA) latex. The colloidal latex was synthesized using GA and SDBS as the emulsifying agents and then used to generate colloidal crystal films via the vertical deposition technique. Dynamic light scattering analysis placed the average particle diameter, polydispersity and Zeta potential at about 122 nm, 0.014 and –36.20 mV for the as-synthesized GA emulsified terpolymer latex and 213 nm, 0.006, –35.60 mV for the SDBS emulsified terpolymer latex, respectively. Thermo-gravimetric analysis and differential scanning calorimetry …
Short Wavelength Infrared Spectral Characterization Of The Mineralogy Of Gokona And Nyabigena Andesite-Hosted Gold Deposits In North Mara, Tanzania, Emmanuel Kazimoto
Short Wavelength Infrared Spectral Characterization Of The Mineralogy Of Gokona And Nyabigena Andesite-Hosted Gold Deposits In North Mara, Tanzania, Emmanuel Kazimoto
Tanzania Journal of Science
The mineralogy of Gokona and Nyabigena gold deposits in Tanzania have been studied using Short Wavelength Infrared (SWIR) Spectrometry technique with an aim to fingerprint hydrothermal system responsible for the formation of the deposits and establish pertinent mineralogical signatures for gold deposition. Gokona and Nyabigena deposits are hosted in porphyritic andesite to basaltic andesite that contains plagioclase phenocrysts, pyroxene, hornblende and Fe-Ti oxides as primary minerals. Other minerals are actinolite, chlorite, epidote, albite and hematite, which indicate metamorphism of the rock under greenschist facies conditions. Hydrothermal alteration of the rock produced chlorite, sericite, carbonates (ankerite, siderite and calcite), pyrite and …
Comparison Of Experimental And Monte Carlo Simulation Of Angular Distributions Of Bremsstrahlung Photons From 28-Ghz Electron Cyclotron Resonance (Ecr) Ion Source, Mwingereza Kumwenda
Comparison Of Experimental And Monte Carlo Simulation Of Angular Distributions Of Bremsstrahlung Photons From 28-Ghz Electron Cyclotron Resonance (Ecr) Ion Source, Mwingereza Kumwenda
Tanzania Journal of Science
Angular distributions of deceleration radiation or bremsstrahlung in German, both experimental and simulated from Electron Cyclotron Resonance Ion Source (ECRIS) are not well understood so far. The bremsstrahlung photons of the angular distributions from 28-GHz ECR ion source at Busan Centre of Korea Basic Science Institute (KBSI) were measured in nine azimuthal angles for the first time. Three round type NaI(Tl) detectors were used to measure the angular distributions of the bremsstrahlung photons emitted at the extraction side of the ECRIS at the same time. Another NaI(Tl) detector was placed downstream from the ECR ion source for monitoring photon intensity. …
Evidence For A Record Of Possible Paleo-Tsunami Or Storm Deposits In The Fluviatile Neoproterozoic Malagarasi Supergroup Of North-Western Tanzania, Charles Kasanzu, Shukrani Manya
Evidence For A Record Of Possible Paleo-Tsunami Or Storm Deposits In The Fluviatile Neoproterozoic Malagarasi Supergroup Of North-Western Tanzania, Charles Kasanzu, Shukrani Manya
Tanzania Journal of Science
Two different localities within the fluviatile Neoproterozoic Malagarasi Supergroup of north-western Tanzania show striking evidence for tsunami related clastic sedimentary deposits. In each locality, the outcrops are characterised by the association of fine grained, thinly laminated shales at the bottom that are overlain by thick deposits of sandstones and conglomerates whose clasts and pebbles vary in size and angularity/roundness. In each case, the two rock units are separated by an erosional surface. The basal shale layers are consistent with deposition in deep shelf environments which are in stark contrast to the immediately overlying conglomerates/sandstones that suggest reworking under high energy …
Preparation And Characterization Of Zns Thin Films Grown By Spin Coating Technique, Oluwatoyin Osanyinlusi
Preparation And Characterization Of Zns Thin Films Grown By Spin Coating Technique, Oluwatoyin Osanyinlusi
Tanzania Journal of Science
Spin coating technique was used to deposit zinc sulphide (ZnS) thin films successfully onto glass substrates and the effects of the number of spin times on the optical properties investigated. The morphology and structures of the prepared thin films were also confirmed. X-ray diffraction confirmed that spin coated ZnS films exhibited cubic structure, where reflections from (111), (220) and (311) are clearly visible with a preferential orientation along (111) plane. The calculated crystallite size for 1S sample from the XRD data is 8.8 nm. From the optical studies, the thin films exhibit good optical properties with relatively high transmittance (81 …
Structural, Mineralogical And Quantitative Characterizations Of Compositions Of Products Linked To Explosive Volcanic Eruption At Haleakala, Usa, Aderemi Alabi, Ibukun Akinsola, Saminu Olatunji, Comfort Ogunyinka1, Oluwatoyin Osanyinlusi
Structural, Mineralogical And Quantitative Characterizations Of Compositions Of Products Linked To Explosive Volcanic Eruption At Haleakala, Usa, Aderemi Alabi, Ibukun Akinsola, Saminu Olatunji, Comfort Ogunyinka1, Oluwatoyin Osanyinlusi
Tanzania Journal of Science
This research focused the analysis vis-à-vis structural, mineralogical and quantitative characterizations of the samples which appeared to be formed from leftover of volcanic eruption sourced from basaltic magma obtained from Haleakala Hill, USA. The results show the presence of natural minerals like pyrolusite, zincite, magnetite, quartz, and diopside with their compositional concentrations in the samples. The geophysical analysis done corroborates the results obtained from the Scanning Electron Micrograph, which confirms the porosity of one of the samples. The X-Ray Diffraction results reveal the average grain sizes of the samples to range between 16 nm and 25 nm. Sample 'A' showed …
Simulated Annealing Algorithm For The Linear Ordering Problem: The Case Of Tanzania Input Output Tables, Allen Mushi
Simulated Annealing Algorithm For The Linear Ordering Problem: The Case Of Tanzania Input Output Tables, Allen Mushi
Tanzania Journal of Science
Linear Ordering is a problem of ordering the rows and columns of a matrix such that the sum of the upper triangle values is as large as possible. The problem has many applications including aggregation of individual preferences, weighted ancestry relationships and triangulation of input-output tables in economics. As a result, many researchers have been working on the problem which is known to be NP-hard. Consequently, heuristic algorithms have been developed and implemented on benchmark data or specific real-world applications. Simulated Annealing has seldom been used for this problem. Furthermore, only one attempt has been done on the Tanzanian input …
Influence Of Deposition Temperature On Properties Of Multilayered Gallium Doped Zinc Oxide Films Prepared By Dc Magnetron Sputtering Technique, Elisante Maloda, Anayesu Malisa
Influence Of Deposition Temperature On Properties Of Multilayered Gallium Doped Zinc Oxide Films Prepared By Dc Magnetron Sputtering Technique, Elisante Maloda, Anayesu Malisa
Tanzania Journal of Science
Multilayered transparent conducting films based on ZnO: Ga were deposited onto glass substrate by DC magnetron sputtering technique. The films were prepared from alloy (Zn: Ga) and ceramic (ZnO: Ga) targets with gallium composition of 3 at% and 4 at%, respectively. Crystal structure and phase analysis were measured using X-ray diffractometer (XRD). The XRD structural analysis results indicated that all multilayered films were polycrystalline with (002) orientation slightly shifted of diffracting angles due to gallium dopant concentrations as increase in the deposition temperatures. The films were hexagonal wurtzite structure, having preferred growth orientation in c-axis perpendicular to the substrate surface. …
A Nexus Between Carbon Emissions And Land Surface Temperature In The Six Ecological Zones Of Nigeria, Folasade Oderinde
A Nexus Between Carbon Emissions And Land Surface Temperature In The Six Ecological Zones Of Nigeria, Folasade Oderinde
Tanzania Journal of Science
The increase in the emission of carbon dioxide (CO2) in the atmosphere has been identified as a driving cause of global climate change which is a threat to the normal functioning of human and natural systems. Therefore, this study investigated the relationship between the emissions of CO2 and land surface temperature (LST) in the six ecological zones of Nigeria. High resolution satellite imageries of land surface temperature and carbon were downloaded from the website of the National Aeronautics and Space Administration (NASA) between January 2002 and December 2012 and were utilized for the study. The data were processed using Arc …
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Tanzania Journal of Science
The sedimentary succession ranging in age from Permian to Early Triassic in Ruhuhu basin was subdivided into eight informal lithostratigraphic units, identified by the symbols from K1 to K8. Manda Formation (K8) belongs to Early Triassic age and comprises two Members, i.e., Lower Kingori Member and Upper Lifua Member (150-200 m thickness). The implications of present study relate to inter and intra basinal correlations which may provide regional depositional framework from a mass of local details. Present investigation connoting the lithofacies studies in conjunction with palaeocurrent and grain size analysis of the early Triassic strata aims at interpreting the depositional …
Assessment Of The Geochemical Characteristics Of Water And Surface Sediments Of Rufiji Mangrove Forest, Tanzania, Dativa Shilla, Daniel Shilla
Assessment Of The Geochemical Characteristics Of Water And Surface Sediments Of Rufiji Mangrove Forest, Tanzania, Dativa Shilla, Daniel Shilla
Tanzania Journal of Science
This study was carried out to investigate the geochemical characteristics of the Rufiji mangrove systems using mineralogy and heavy metal analyses. Rufiji mangrove sediments showed predominance of fine grain size fractions with silt as the major component. Stoichiometric ratios of nutrients revealed phosphorus enrichment in Rufiji sediment. The overall order of heavy metal concentrations in sediments was: Fe > Mg > Mn > Zn > Cr > Ni > Pb > Cu > Co > Cd. There was no relationship between grain size and some of the heavy metal concentrations, except for Co, Cr, Fe, and Mg which negatively correlated with sand, and positively correlated with silt. The findings …
Geochemical Characteristics Of Soil In Relation To Occurrence Of Entomopathogenic Nematodes (Epns) In Osogbo, Osun State, Nigeria, Mohammed Rufai, Abidat Shittu, Monsuru Adeleke
Geochemical Characteristics Of Soil In Relation To Occurrence Of Entomopathogenic Nematodes (Epns) In Osogbo, Osun State, Nigeria, Mohammed Rufai, Abidat Shittu, Monsuru Adeleke
Tanzania Journal of Science
The occurrence and abundance of entomopathogenic nematodes (EPNs) vary across locations, and this has been attributed to many factors including soil physico-chemical properties. This study examined the influence of selected soil chemicals on the occurrence of EPNs under different cultivated lands in Osun state, Southwestern Nigeria. EPNs were isolated from 23.33% of the soil samples in selected sites using decantation and centrifugation method and nematodes observed under standard microscopy were identified based on morphological analysis of infective juveniles (IJs). This study has revealed the presence of nematodes of the families Steinernema and Heterorhabditis in the sampled soils. Soil chemical properties, …
Variations Of Concentrations Of Lead, Zinc, Iron, Copper And Cadmium In Urine Of Primary School Pupils In Relation To Age, Sex And Academic Performance, John Mahugija, Zainab Kasenya, Kessy Kilulya
Variations Of Concentrations Of Lead, Zinc, Iron, Copper And Cadmium In Urine Of Primary School Pupils In Relation To Age, Sex And Academic Performance, John Mahugija, Zainab Kasenya, Kessy Kilulya
Tanzania Journal of Science
This study was conducted in order to assess the variations and correlations in the concentrations of lead, zinc, iron, copper and cadmium metals in the urine samples of selected primary school pupils with respect to their sex, age and academic performance. Urine samples were collected from 240 pupils in Dar es Salaam, Tanzania and then digested in concentrated acids and analysed using atomic absorption spectrometry (AAS). Lead, zinc, iron and copper were detected in most of the urine samples. Cadmium was not detected in any of the samples. The mean concentrations of lead, zinc, iron and copper in the samples …
Isodon Diterpenoids, Derivatives And Their Pharmacological Potentials-A Review, Monica M. Ndoile
Isodon Diterpenoids, Derivatives And Their Pharmacological Potentials-A Review, Monica M. Ndoile
Tanzania Journal of Science
The searches of various literatures have shown the genus Isodon to be a source of different compounds with interesting biological activities. The genus has provided many efficacious herbal medicines that are used in various countries including China; therefore, it has become the centre of attention to phytochemistry and pharmacology researchers. There are many reports on chemical and biological aspects of Isodon species, especially in China and other parts of the world; however, reports on African Isodon species are scanty. Since the literature indicates the genus to be rich in diterpenoids with potential therapeutic activities as revealed herein, with African species …
Geochemical Characterization Of The Paleoproterozoic Massif-Type Anorthosites From The Ubendian Belt, Tanzania, Nelson Boniface
Geochemical Characterization Of The Paleoproterozoic Massif-Type Anorthosites From The Ubendian Belt, Tanzania, Nelson Boniface
Tanzania Journal of Science
Paleoproterozoic massif-type anorthosites occur in Southern Ubendian Belt (Upangwa Terrane) in Tanzania, mainly as mafic-plutons (meta-anorthosite and meta-gabbro) associated with ultramafic stocks and titaniferous magnetite bodies. Variably metamorphosed silicic granitoids are also recorded in the area. This article presents geochemical characteristics of meta-anorthosites, meta-gabbros and the associated granitoids in order to determine their genetic links and geotectonic settings. The meta-anorthosites, meta-gabbros and meta-tonalite have indistinguishable chondrite normalized REE patterns displaying LREE-enriched patterns (e.g., (La/Sm)N = 1.97–6.10) and negatively sloping HREE ((La/Yb)N = 4.05–47.06) suggesting continental crustal affinity. The trace element patterns of the studied meta-anorthosites are characterized by enrichments of …