ABSTRACT Silver nanoparticles (AgNPs) are the most studied metal nanoparticles due to their ever growing range of applications in areas such as chemical sensing, nanomedicine and electronics which has led to their increased demand. The AgNPs synthesis involves the use of hazardous reagents and toxic solvents. There is need to develop methods AgNPs that use environmentally benign reagents and solvents. This research work reports a green method where AgNPs were synthesized using silver nitrate...
ABSTRACT Computational and theoretical advances have progressed sufficiently so that it is now possible to calculate reaction rates directly from ab initio theory without the intervening use of any analytical method. The rate constants of chemical reactions are calculated using information about the structures, energies, and Vibrational frequencies of reactants and transition states. Computer algorithms help in determining the structures of the molecules and in understanding how molecules re...
ABSTRACT The reaction of α–toluenesulphonyl chloride with various readily available amino acids in basic medium afforded α–toluenesulphonamides (1a-k) which had their acid function subsequently amidated with diethyl amine to obtain their corresponding new N,Ndiethylalkanamido substituted α–toluenesulphonamide derivatives (2a-k). The electrophilic addition of p-toluenesulphonyl chloride with various amino acids' nitrogen gave p-tolylsulphonamide derivatives (4a-k) which upon further ...
Abstract Some of the physiochemical properties of Azadirachta indica Gum (Neem) Gum were studied. They include: moisture, ash, nitrogen hence the protein, pH value and specific optical rotation. The results show that: moisture content is 13.07%, ash content is 3.13%, Nitrogen content is 4.9%, protein is 32%, specific optical rotation is –65.5, and pH is 6.5. The number molecular weight of the sample was estimated using osmotic pressure measurement and found to be 4.0×106 g/mole. Thermodyn...
ABSTRACT The two natron samples were collected from different location of different environments .The samples were analysed qualitatively and quantitatively by standard methods of analysis to determine the chemical composition and the concentration of each component . The effect of natron on chemical structure of Toombak was studied. The analytical techniques used in this study are:- Flame Emission spectroscopy which was used to determine sodium and potassium ions, content and the results wa...
ABSTRACT Numerous pyrazoline derivatives have been found to possess considerable biological activities; this fact had led us to model and design 120 trisubstituted 2-pyrazoline derivatives by linking pyrazoline ring system with different substituents in position 1, 3 and 5. Quantitative structure–activity relationship (QSAR) studies were carried out in order to get models that can be used to predict the anti-cancer activity of designed compounds. Data set of compounds consisting of pyrazol...
Abstract A simple, precise, accurate and economical Reverse phase HPLC with a detection UV, method was developed and validated for the simultaneous determination of Bisoprolol fumarate and Hydrochlorothiazide in pharmaceutical formulations. Better separation was achieved using Cyanide column (250mm × 4.6mm, 5μm), maintained at 30 ͦC. The mobile phase was composed of buffer: methanol in the ratio of 82:18 (v/v), (the buffer was 1% solution of tetra butyl ammonium hydroxide, adjusted to pH ...
Abstract In this study, the fixed oil of Capsicum annum was extracted from seeds with n-hexane at room temperature. The oil was analyzed by gas chromatography-mass spectrometry (GC-MS) GC-MS analysis of the studied oil revealed the presence of 27 components. The major constituents were: octadecadienoic acid methyl ester (56.57%), hexadecanoic acid methyl ester (17.60%).Minor constituents were octadecenoic acid methyl ester (5.62%), methyl stearate (5.50%), and stigmasterol (2.37%). The oil w...
Abstract Hejamah or Blood cupping or bloodletting is a traditional Islamic treatment and a part of the prophetic medicine recommended by the prophet Mohammed, Peace Be upon Him .Hejamah is a form of cupping therapy (sucking blood out of the body for healing purposes).This study was carried out to evaluate the effect of hijamah on the liver concentrating specifically in the effect on liver enzymes (AST and ALT) and albumin protein levels. This study was accomplished in Khartoum state on rando...
Abstract The oil of the medicinally important speciescorochorusolitorius was extracted by hexane and analyzed by GC-MS. The analysis revealed the presence of 22 components. The major components are: 9, 12- , hexadecanoic acid methyl .octadecadienoic acid (z,z)-,methyl ester 9, 12, 15-octadecatrien acid,2,3-dihydroxy ً.,methyl stearate .ester proply esterand eicosanoic acid, methyl ester. In cup plate ager diffusion bioassay corochorusolitorius oil showed excellent activity against Bacillus ...
ABSTRACT this study branches, and number of nodes were determined at maturity. The Leaf chlorophyll content was extracted using spectrophotometer set at a wavelength of 634nm, 648nm and 470nm.The chlorophyll a ranges from 0.76 to 1.49, chlorophyll b ranges from 3.17 to7.34 and the total chlorophyll ranges from 3.93 to 8.83. The data analysis was subjected to ANO VA using statistical software. The result showed that accession UAM09 I 556 and accession Tl 07K-297-13 have the highest plant...
Abstract Over the last few decades, the applications of nanotechnology in medicine have been extensively explored in many medical areas, especially in drug delivery. Nanotechnology concerns the understanding and control of matters in the 1-100 nm range, at which scale materials have unique physicochemical properties including ultra-small size, large surface to mass ratio, high reactivity and unique interactions with biological systems [1]. Drug-loaded nanoparticles can be achieved through phy...
Abstract A sample of Citrullus colocynthis fruits were collected from Alamab Area South Khartoum state, the seeds were isolated after dryness of the fruits. Phytochemical screening of the seeds indicate that they contain of flavonoids, tannins, cumarins , sterol, triterpene, saponins and Alkaloids. The oil of Citrullus colocynthis was extracted from the seeds. The average yield was 20%. Physico-chemical characterization result show that the density of the oil was 0.9728 g/cm3, Iodine value ...
Abstract In this research, the corrosion behavior of the copper and copper alloy in different conditions and environment were studied. The corrosion behaviour and mechanism for copper and copper alloy in( HNO3, H2SO4,HCl, NaCl)solutions were studied by chemical mass loss, kinetic of corrosion, half life time, inhibitor efficiency and corrosion rate of inhibitor efficiency methods at25oC.were also investigated. The chemical results revealed that copper and copper alloy corrodes in( HNO3, H...
ABSTRACT Unique properties of silver (Ag) and its allied nanoparticles are of great interest in the fields of chemistry and technology. However, the widespread applications of nanoparticles call for synthesis routes involving eco-friendly procedures. Silver nanoparticles (Ag NPs) and their hybrids nanoparticles (Ag-Ni and Ag-Co) were synthesized using locally available biodiversity plants as alternative method to the expensive and toxic chemicals previously used. Fresh plants were collected ...