Natural & Applied Sciences

Research Papers/Topics Natural & Applied Sciences

ASSESSMENT OF THE EFFECTS OF CARBONATED DRINKS ON THE ENAMEL OF THE TEETH

ABSTRACT Assessment of the effects of carbonated drinks on the teeth have been carried out. Five white shelled hard-boiled eggs were placed in clear cups and labelled (Soda Drink, Diet Coke, Coke, Tap Water and Vinegar), with the respective selected liquid poured into the cups and ensured the liquid covers the eggs placed in the cups. The eggs were allowed to sit for 72 hours. At 72 hours the eggs were removed from the cups for inspection. The egg in water showed no changes, this is because t...

Developing Framework for Adopting E-learning Pedagogical Approach in Higher Education. A Case for Makerere Univeristy, Kampala, Uganda.

ABSTRACT The overall objective of this study is to investigate the challenges of adopting e-learning pedagogical approach in higher education in higher education institutions in Uganda. The descriptive research design method was employed in this study. It involved using the questionnaires in collecting data from the respondents. The quantitative research design was used in gathering data on cases of efficiency in accessing, retrieving, securing, storing, registering and disseminating informat...

Effect Of Mortality, Fertility and Net Migration on Population Growth in Uganda (1985-2015)

ABSTRACT The study aimed at examining the effect of mortality rate fertility rate and net migration on population growth in Uganda from the period of 1985 to 2015 using time series data. Specifically, the study aimed at examining how each of these variables affects population growth. The objectives were; to examine the relationship between mortality rate and population growth rate in Uganda, to determine the relationship between fertility rate and population growth rate in Uganda are and to a...

SSA Research 70 PAGES (16743 WORDS) Statistics Thesis
Assessment Of Heavy Metal Pollution in Water, Soil and Rice Grown Around River Yobe, Nigeria

ABSTRACT The study was carried out to determine the levels of pollution, by selected metals. in water, soil and rice grown around River Yobe, Nigeria. The samples were collected from four different locations and were analyzed for physicochernical parameters, heavy metals and pollution indices. The pH of water and soil samples were found to be within the range of 6.47 ± 0.05 — 6.85 ± 0.13 and 6.00 — 7.70 respectively. The EC, Alkalinity, chloride, hardness, TDS and turbidity of the water...

SSA Research 86 PAGES (20662 WORDS) Chemistry Thesis
The Preparation Of Magensium Glucourantes From Acacia Seyal Var. Seyal Gum

Abstract In this investigation,physicochemical properties of Acacia seyal(Talha) sample was studied [moisture content (10.79%), ash (1.1294%), nitrogen (0.15%), specific optical rotation (+46.1°), pH (4.5)]. Mineral contents of Ca and Mg in two samples (S1gum, S2 magnesium glucurnates and S2) has been analysizedby using Atomic Absorption Spectroscopy (AAS), the results were (Ca in sample S1 = 1934.4, Ca in sample S2 = 65.22, Mg in sample S1 = 19.86 and Mg in sample S2 = 1264.8). List of Co...

Antimicrobial Activity of Azadirachta Indica (Neem) Against Bacteria Isolated from Urinary Tract Infected Patients in Khartoum State

Abstract This was analytical study conducted during the period from January to April 2017, to determine the antimicrobial activity of Azadirachta indica leaves methanolic extract against different bacteria isolated from urinary tract infection. A total of 130 urine samples were collected from patients with Urinary tract infection. These specimens were inoculated into Cystine Lactose Electrolyte Deficiency (CLED) media and incubated aerobically at 37 C for 24 hrs. The clinical isolates were th...

Constituents of Celery (Apium graveolens ) Seed Oil and its Biological Activity

Abstract This study was aimed to extract the fixed oil of Apium graveolens through the process of maceration with normal hexane. The oil was analyzed by gas chromatography-mass spectrometry. The antimicrobial activity was also estimated. The GC-MS analysis of the studied oil showed the presence of 45 constituents. Major components are: i) 9-Octadecenoic acid methyl ester (56.04%) ii) 9, 12-Octadecadienoic acid methyl ester (13.47%) iii) Hexadecanoic acid methyl ester(12.05%) iv) Methyl steara...

Characterization of Flavonoids from Albizia Amara Leaves and Their Biological Activity on Microbes

Abstract Phytochemical screening of methanol extract of leaves of Albizia Amara revealed the presence of secondary metabolites: saponins, alkaloids, tannins, glycosides and flavonoids. Powdered shade- dried leaves (1kg) of A. amara. were extracted with 95% ethanol at room temperature for 48 hours, The crude extract was suspended in water and partitioned with organic solvents in order of increasing polarity, petroleum ether, chloroform ethyl acetate and n-butanol, three compounds were isolated...

Assessment of the Effect of Addition of Baobab ( Adansonia Digitata L.) Fruit Pulp on Properties of Camel Milk Yoghurt

Abstract This study was carried out to investigate the effect of Baobab fruit pulp on the physicochemical and microbiological properties of yoghurt made from camel milk and cow milk. Yoghurt was made from camel milk and cow milk with Baobab fruit pulp (5g/L, 10g/L, 15g/L, and 20g/L). Starter culture was added at rate of 3 % (v: v) and stored for 10 days at 4ᵒC. Physicochemical and microbial (acidity, pH, total solids, solids not fat, ash, protein, Fat, lactose, moisture, crude fiber, synere...

The Effect of Hemodialysis on Serum Levels of Iron and C-Reactive Protein in Patients with Renal Failure

Abstract This study was carried out to assess the effect of hemodialysis on iron and C-reactive protein (CRP) in patients with renal failure. Sixty samples were collected from patients in period between April to May 2015, chosen randomly from Association specialized hospital in Khartoum states, and thirty apparently healthy individuals as controls. Measure plasma iron and CRP by using Hitachi/cobas C311 system, and results were analyzed using statistical of package social science (SPSS), comp...

Bioethanol Production from Sorghum Grains

Abstract A biofuel is a fuel that produced through contemporary biological processes such as agriculture and anaerobic digestion, rather than a fuel produced by geological processes. It can be derived directly from plants or indirectly from agriculture or industrial waste. Bioethanol is an alcohol made by fermentation, it is produced from sugar or starch crops such as corn, sugar cane or sweet sorghum. Biodiesel and ethanol can be used as fuel for vehicles in its pure form but it is usually u...

Structural and Optical Properties of ZnO Nano-Powder Synthesized by Combustion and Sol-gel Method

Abstract Nowadays, ZnO is considered as the most important chemical compounds due their distinctive properties owing to its wide band gab and large exciton binding energy. It is well known that the structural and the optical properties of ZnO differ by different methods of preparation. Therefore, in this work, ZnO power was prepared by two methods, namely sol-gel and combustion method with the aim of comparison. The obtained samples from both methods were investigated by many techniques for c...

Flood Mapping and Risk Assessments by Using Geographic Information System and Remote Sensing

ABSTRACT Flood is one of the most destruction natural hazards which lead to the loss of lives, properties and resources. It has therefore become important to create easily read, rapidly accessible flood hazard map, which will prioritize the reduction effects . This paper addresses the need for an efficient and cost-effective methodology for preparing floodhazard maps in part of Khartoum statethrough drawing a map showing the flooded areas on either side of the White Nile to the four zones: - ...

Sero-prevalence of Hepatitis B Virus among Pregnant Women in Red Sea State

ABSTRACT Hepatitis B Virus (HBV) occurs worldwide with more than 2 billion people being infected at some time in their lives. Transmission of this virus from carrier mothers to babies can occur during perinatal period. This study was conducted to determine prevalence of HBV infection among pregnant women in Rea Sea State. The study was carried out during the period from April to July 2017. A total of ninety one (n=91) pregnant women were enrolled in this study. Sociodemographic data including...

Establishment of National Diagnostic Reference Level for bone Radiation Doses in Nuclear Medicine Department in Khartoum – Sudan

Abstract A diagnostic reference level (DRL) is an investigational level used to identify unusual high radiation doses in Nuclear Medicine procedures. DRLs are suggested action levels above which a facility should review its methods and determine if acceptable image quality can be achieved at lower doses. The high specific activity of 99mTc makes it suitable as a first pass agent, for multiple or sequential studies. Is preferred to 99mTc - pertechnetate. A certain amount of radiopharmaceutical...


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