In this thesis photo resistor (CdS) was used to calculate the energy gab using simple electrical method, it was found that to be and and electrical conductivity of photo resistor equal to and (I.V) characteristic was studied under the influence of temperature variation and constant polarization angle of irradiation (𝜃 ,also the of relation versus angle 𝜃 at constant voltage was considered with temperature variation. Different relation was plotted and the results were discussed fo...
Nowadays, the use of facial makeup among most Sudanese ladies becomes very popular without being aware about the potential dangers that can threaten their health while using these cosmetics. Several facial cosmetics available in Sudanese markets are unsafe. A questionnaire survey and statistical analysis were employed in this investigation. Actual participants size (500) were females, university students (70%), employees ladies (20%), house wives (7.5%) and others (2.5%). It was found th...
Abstract The recent advancement in Wireless Sensor Network (WSN) technology has brought new distributed sensing applications such as water quality monitoring. With sensing capabilities and using parameters like pH, conductivity and temperature, the quality of water can be known. This paper proposes a novel design based on IEEE 802.15.4 (Zig-Bee protocol) and solar energy called Autonomous Water Quality Monitoring Prototype (AWQMP). The prototype is designed to use ECHERP routing protocol an...
In this study Three plants species from eastern and western Sudan were studied: Namely Acacia nubica benth( Laot), Citrus paradise (grapefruit ) and Combretum Hartmonnina Schweinf (Habeel ). The plant material was extracted using 95% ethanol.The crude extracts were subjected to a phytochemical screening which revealed the presence of flavonoids among other phytochemicals .The crude extracts were purified by thin layer chromatography utilizing different solvent systems ,and characterize...
The introductory chapter of this thesis outlines multicomponent reactions and describes in detail the chemistry of the Mannich reaction. The final section of the introduction deals with chemical informatics Ten compounds of β-aminoacetophenone derivatives were synthesized by the condensation of ketone (acetophenone or p-bromoacetophenone) with different aromatic amines and benzaldehyde; general preparative method, ACD/lab programmer method and Swiss target prediction method for synthe...
In this research, we deal with three forms of Stokes’ theorem. The version known to Stokes’ appears in the last chapter, along with its inseparable companions, Green’s theorem and the Divergence theorem. We discuss how these three theorems can be derived from the modern Stokes theorem, which appears in chapter (4), with some applications on oriented manifolds with boundary. In addition to applications of Maxwell’s field equations.
ABSTRACT The purpose of this study was to investigate the viability of using Online Social Networks (OSNs) as e-learning platforms in Tanzanian Universities. The population of this study was students of the University of Dodoma. Observation and questionnaires were used as a research instruments to collect data from 390 respondents which were proportionally selected. Quantitative data was analyzed using SPSS to obtain the breadth to which the observed behavior and practices are distributed wi...
Vegetable tannage is an eco-friendly method compared with environmental polluting chromium based method of tanning that is commonly used in commercial tanning and which prevents the collagen fibrous protein in animal skins from putrefaction and produces hydrothermal stable product commonly known as leather. Thus study was conducted to improve the tanning efficiency of locally available tanning in the Sudan 'Garad', applying blending method, physico chemical properties of 'Garad', bark an...
ABSTRACT S. aureus is an extraordinarily versatile pathogen, and it can cause a large spectrum of infections, from mild to severe and fatal. It is important in humans and also economically important when infecting animals, able to cause superficial lesions and systemic infections. The aim of this study is to detect Can, Ica, Hlg and SdrE virulent genes of Staphylococcus aureus associated with different types of infections among Sudanese in Khartoum State. The Samples were collected from dif...
This study is done to investigate the quality of water in Sodri in North of Kordfan and to see the effect of traditional mining on it’ s quality. Three samples of groundwater were collected according to standards methods:- One sample from the hafir and two samples from the wells. Samples were analyzed for physical and chemical parameters. A number of analytical techniques were used. Atomic Absorption Spectroscopy was used for quantification of elements namely iron, zinc, manganese an...
Abstract The environmental impact of traditional Gold mining activity has become a concern. The concern is due to the methods that are used in the extraction of the Gold from its co-metals, particularly the use of the Mercury. The purpose of the study to identify the impact of the traditional gold mining in Elcrow in Abo Hamad district. This research was undertaken to determine the concentration of toxic heavy metals that have been used to extract gold such as Mercury or has been released du...
Abstract. The objective of this study was to make an assessment to the building design in the nuclear medicine department of Al-neilain medical diagnostic center at khartoum, and to show the level of conformity as compared to the international standards for an ideal building designs of a nuclear medicine department in aspect of radiation protection. This study was done in Al- neilain medical diagnostic center of Khartoum, in the period from February to April 2017. Measurements of scanning ro...
Magnetic properties of matter play an important role in human life. This requires developing the physical theories that describe magnetic phenomena. One of these important fields is the magnetic properties of superconductors. Till now there is no satisfactory theory that fully explains these magnetic properties of superconductors. This set back encourages constructing a model based on temperature dependent Schrodinger equation to explain superconductivity destroy by external magnetic fi...
Samples of Anogeissus leiocarpus gum were randomly collected as natural exudates from different locations of the Sudan gum belt. The physicochemical properties of composite samples studied were moisture content, ash, nitrogen, protein, specific rotation, relative viscosity, refractive index, density, also UV electromagnetic radiation, metals ions, pH, uronic acid, reducing sugars and infrared spectra. Analysis of variant of results showed insignificant dif ferences (p < 0.05) in all pro...
At the present work a simple, precise, accurate and economical reverse phase HPLC with UV detector method, was developed and validated for the simultaneous determination of acetaminophen and orphenadrine citrate in pharmaceutical formulations. better separation was achieved using cyanide column (250mm × 4.6mm, 5μm), maintained at 25 ͦC. The mobile phase was composed of (tri ethyl amine aqueous, methanol and acetonitrile) in the ratio of 50:20:30 (v/v/v), adjusted at pH 3.8 by ortho ...