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  Subjects -> CHEMISTRY (Total: 847 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (598 journals)
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CHEMISTRY (598 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 5)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 25)
ACS Catalysis     Full-text available via subscription   (Followers: 24)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 15)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 19)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 31)
ACS Nano     Full-text available via subscription   (Followers: 160)
ACS Photonics     Full-text available via subscription   (Followers: 6)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 16)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription   (Followers: 1)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chromatographica     Full-text available via subscription   (Followers: 8)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 4)
Acta Scientifica Naturalis     Open Access  
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 4)
Advanced Functional Materials     Hybrid Journal   (Followers: 41)
Advanced Science Focus     Free   (Followers: 2)
Advances in Chemical Engineering and Science     Open Access   (Followers: 33)
Advances in Chemical Science     Open Access   (Followers: 10)
Advances in Chemistry     Open Access   (Followers: 8)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 14)
Advances in Drug Research     Full-text available via subscription   (Followers: 21)
Advances in Environmental Chemistry     Open Access   (Followers: 1)
Advances in Enzyme Research     Open Access   (Followers: 4)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 12)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 15)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 36)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 13)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 13)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 2)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 67)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 12)
American Journal of Chemistry     Open Access   (Followers: 23)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Full-text available via subscription   (Followers: 8)
Anadolu University Journal of Science and Technology     Open Access  
Analyst     Full-text available via subscription   (Followers: 40)
Angewandte Chemie     Hybrid Journal   (Followers: 121)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 169)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 2)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 3)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 7)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 8)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Full-text available via subscription  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 5)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
Applied Surface Science     Hybrid Journal   (Followers: 22)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 2)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 4)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 8)
Biochemistry     Full-text available via subscription   (Followers: 212)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 8)
Bioinspired Materials     Open Access   (Followers: 2)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 17)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 9)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 99)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 90)
Bioorganic Chemistry     Hybrid Journal   (Followers: 9)
Biopolymers     Hybrid Journal   (Followers: 17)
Biosensors     Open Access   (Followers: 1)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 3)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal  
C - Journal of Carbon Research     Open Access   (Followers: 2)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Carbohydrate Research     Hybrid Journal   (Followers: 27)
Carbon     Hybrid Journal   (Followers: 66)
Catalysis for Sustainable Energy     Open Access   (Followers: 5)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 5)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 6)
Cellulose     Hybrid Journal   (Followers: 4)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription  
ChemCatChem     Hybrid Journal   (Followers: 5)
Chemical and Engineering News     Free   (Followers: 11)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 62)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 20)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 17)
Chemical Reviews     Full-text available via subscription   (Followers: 140)
Chemical Science     Open Access   (Followers: 18)
Chemical Technology     Open Access   (Followers: 5)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 4)
Chemical Week     Full-text available via subscription   (Followers: 7)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 53)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 26)
ChemInform     Hybrid Journal   (Followers: 4)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 5)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 2)
Chemistry - A European Journal     Hybrid Journal   (Followers: 115)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 12)
Chemistry and Materials Research     Open Access   (Followers: 14)
Chemistry Central Journal     Open Access   (Followers: 5)
Chemistry Education Research and Practice     Free   (Followers: 4)
Chemistry in Education     Open Access   (Followers: 2)
Chemistry International     Hybrid Journal   (Followers: 1)
Chemistry Letters     Full-text available via subscription   (Followers: 42)
Chemistry of Materials     Full-text available via subscription   (Followers: 148)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 8)
Chemistry World     Full-text available via subscription   (Followers: 22)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 6)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 5)
Chromatography Research International     Open Access   (Followers: 5)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 8)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 17)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 1)
Composite Interfaces     Hybrid Journal   (Followers: 3)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 10)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 9)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription  
Copernican Letters     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 4)
Crystal Structure Theory and Applications     Open Access   (Followers: 2)
CrystEngComm     Full-text available via subscription   (Followers: 6)
Current Catalysis     Hybrid Journal   (Followers: 1)
Current Metabolomics     Hybrid Journal   (Followers: 3)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 7)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 15)
Current Research in Chemistry     Open Access   (Followers: 7)
Current Science     Open Access   (Followers: 20)
Dalton Transactions     Full-text available via subscription   (Followers: 17)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 1)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 3)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 2)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 4)
EDUSAINS     Open Access  
Elements     Full-text available via subscription   (Followers: 1)
Environmental Chemistry     Hybrid Journal   (Followers: 5)

        1 2 3 | Last

Journal Cover Chemistry and Materials Research
  [14 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2224-3224 - ISSN (Online) 2225-0956
   Published by IISTE Homepage  [30 journals]
  • Modification of Mango Extract with Mixture of Chitosan, Glycerine and
           Tapioca to Produce Edible Film

    • Authors: Emma Zaidar, Rumondang Bulan, Zul Alfian, Jimmy ., M. Said Siregar
      Abstract: Edible film by mixture of mango extract with chitosan, glycerol and tapioca has been produced. The homogeneous mixture formed on akrilik metal sheet and dried into oven at temperature of 30oC for 2 days. The result of physical test was tensile strength about 0,2285 Kg F/mm2 and elongation about 48,9100% and thickness about 0,2480 mm2 and base on SEM test to film that result the compatible film and showed a smooth and thin surface, FTIR test result the long wave is from 3230 – 3400 cm-1 that showed strecth of –OH and – NH groups. The long wave from 1800 – 2200 cm-1 is vibration of NH+ group. This is showing, there is interaction between glycerine, tapioca, chitosan from edible film. The nutrition test results that water degree about 17,1700%, protein degree about 5,500%, carbohydrate degree about 72,220%. Keywords: modification, mango extract, chitosan, glycerine, tapioca, edible film.
      Issue No: Vol. 8
       
  • Coordination of (Oxazepine, Triazol ,Azitidine)–Ligands with (Cd2+)
           and Studying of its Properties

    • Authors: Aafaq Jaber Kadhum Alnajem
      Abstract: The  aim  of this work , preparation  of series ligands  ( five  ligands ) such as ( Schiff base , oxazepine , triazol , azitidine )  and  optimal  studying of conditions  for  its coordination  with  cadmium ion , other measurements  were carried out  in this studying. The five ligands  and their coordination  with  cadmium ion  were characterization  by  spectral  studies such as{FT.IR–spectra , 1H.NMR-spectra , UV.Vis –spectra} , and  physical  studies  such as { molar conductance  ., effect of  polarity series solvents  .,melting point } , and ., determination of  optimal  conditions of  complexes . From results , the ligands behave as tridentate donor ligands forming  chelates with (1:2) (Cd: ligand) stoichiometry . Keywords : stok , point, tri .  
      Issue No: Vol. 8
       
  • Studying of Pechmann Condensation Products of Ethyl Acetoacetate with
           2,7-Dihydroxynaphthalene

    • Authors: Fadia AL-haj hussien
      Abstract: Two benzocoumarins and a benzochromone were synthesized starting from 2,7-dihydroxynaphthalene and ethyl acetoacetate in the presence of Amberlyst-15  as condensing agent. The structures of the products have been elucidated by 1H NMR, 13C NMR, FT-IR spectral methods. Keywords: 2,7-Dihydroxynaphthalene, Ethyl acetoacetate, Benzocoumarin, Benzochromon, Pechmann Condensation.
      Issue No: Vol. 8
       
  • A NEW INSECT MOULTING HORMONE PHYTOECDYSTERONE TAXISTERONE – B FROM
           THE ROOTS OF TRICHOSANTHES CUCUMERINA(LINN)

    • Authors: Kumud Shrivastava
      Abstract: A new phytoecdysterone has been isolated from Trichosanthes Cucumerina Line (Cucurbitaceae), which exhibits strong moulting activity. On the basis of chemical and physico-chemical evidences,it has been identified as; 3 epi-22 deoxy –ecdysterone (I). This is the first example of the presence of naturally occurring insect moulting hormone in this plant . Key words: Phytoecdysterone,moulting activity,hormone,physico – chemical   Trichosanthes Cucumerina is credited to reputed therapeutic value1,2 and some steroidal constituents have already been isolated from the fruits and roots of this plant,3,4 therefore the leaves of T. cucumerina were investigated resulting in the discovery of a new phyto - ecdystrone.
      Issue No: Vol. 8
       
  • Synthesis and Characterization of Some Cobalt (ІІ) and Copper
           

    • Authors: Enas YOUSEF
      Abstract: 2-Hydroxybenzaldehyde has been reacted with 1,4-phenylendiamine and 1,2-phenylendiamine to give the N2O2 Schiff Base type ligands named N,N'-bis( salicylidene)-1,4-phenylenediamine (L'H2) and N,N'-bis( salicylidene)-1,2-phenylenediamine (L''H2). The structures of the ligands were elucidated by FT-IR, 1H-NMR, 13C-NMR and UV-Vis electronic spectra. The coordination behavior of the (L'H2) and (L''H2) towards Cu(II) and Co(II) ions has been investigated. The reaction of the Schiff base ligands (L'H2), (L''H2) with cobalt (II) and copper (II) ions in 1:2 molar ratio afforded binuclear metal complexes.The changes in the selected vibration bands in FT-IR indicate that Schiff bases behave as N2O2 tetradentate ligands and coordinate to metal ions from phenolic oxygen atoms and azomethine nitrogen atoms. Characterization and structure elucidation of the prepared complexes were achieved by FT-IR, UV-Vis electronic spectra. The metal complexes exhibited different geometrical arrangements such as square planner and tetrahedral arrangements. Keywords: 2-Hydroxybenzaldehyde, Schiff base, binuclear complexes, tetradentate ligands.
      Issue No: Vol. 8
       
  • Synthesis and Characterisation of Copper Oxide Thin Films Using Successive
           Ionic Layer Adsorption Reaction (SILAR) Method

    • Authors: R. Daniel-Umeri, R.U. Osuji, F.I Ezema
      Abstract: CuxO thin films were synthesized on glass substrate by using a simple chemical method; successive ionic layer adsorption reaction (SILAR). The effects of bath pH and temperature on the structural, morphological and optical properties of the films were investigated. The films were prepared by successively dipping them for 20 s each in a solution of 1 M NaOH and then in a solution of 0.1M copper complex. Temperature of the NaOH solution was varied from room temperature to 70oC, while that of the copper complex solution was maintained at room temperature. The films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) , ultraviolet-visible spectroscopy (UV-VIS) and fourier transform infrared (FTIR) spectroscopy. XRD studies confirmed that the films were polycrystalline with both Cu2O and CuO crystallographic phases existing depending on the pH of the solution bath. The calculated crystallite size from the XRD measurement was found to be in the range ∼1.52 - 1.67Å. SEM micrograph revealed that the grains were distributed evenly over the substrate surface. The bandgap value was found to be in the range, 1.6eV-2.0 eV. Keywords: Copper Oxide, SILAR, pH, Temperature.
      Issue No: Vol. 8
       
  • Effects of Ligand on the Optical Properties of Manganese Sulphide Thin
           Films Prepared Using Chemical Bath Deposition (CBD) Technique

    • Authors: Donald Okoli, Chinwe Nkamuo
      Abstract: Thin films of Manganese sulphide semiconductor material were successfully deposited on glass substrate using Chemical Bath Deposition (CBD) technique. The Films were optically characterized using PYE UNICAM SP8-100 Double Beam Spectrophotometer with uncoated glass substrate as a reference frame. The effects of various concentrations of ligand (TEA) on the optical properties of the deposited films were studied. The result shows that the absorbance was observed to decrease towards the infra-red region of electromagnetic spectrum with a value range of 17.5% -72.7%, and the film deposited at 4ml ligand concentration having a highest peak value of 72.7% at 380nm.  The transmittance property of the films was found to be moderate and increases towards the infra-red region. The deposited films exhibited poor reflectance, extinction coefficient, and imaginary part dielectric function properties with film deposited at 2ml concentration of ligand possessing high optical conductivity value of 1.08 x 1014S-1. Refractive index and real part dielectric function of the films were observed to be also high with band gap energy of 2.80eV- 3.15eV. All these desirable properties made the semiconductor to be a good candidate for applications in photovoltaic devices. Keywords: Ligand, semiconductor, electromagnetic spectrum, transmittance, reflectance, optical conductivity, and spectrophotometer.
      Issue No: Vol. 8
       
  • Isolation of Sesquiterpene from the Leaves Extract of Vernonia Amygdalina
           and Its Acute Toxicity to the Albino Mice

    • Authors: Alemu Lelago
      Abstract: Vernonia amygdalina is a shrub or small tree which is widely used traditional medicinal plant for the treatment of schistomiasis, amoebic dysentery, malaria, veneral diseases, wounds, hepatitis and diabetes and gastrointestinal problems. The objective of this study was to extract, isolate and determine the structure of the constituents of biologically active crude extracts of the leaves of Vernonia amygdalina and its toxicity investigation on albino mice. Extraction was carried out by maceration; isolation and characterization were carried out by using chromatographic and spectroscopic technique respectively. The screening of secondary metabolites showed the presence of alkaloid, flavonoids, phenols, saponin, steroids and glycosides in methanol extract. Fractionation of crude extract was carried by using column chromatography. The isolation result afforded sesquiterpene which was elucidated by using spectroscopic methods (IR, 1H NMR, 13 C NMR and DEPT 135).  The acetone extract showed toxicity at higher dosage with LD50=824.6 mg/Kg but methanol extract did not show any toxicity up to 2000 mg/Kg to the albino mice. Due to high applicability of the plant a number of isolated compounds and chronic toxicity should be carried out for further information. Keywords: Vernonia amygdalina; sesquiterpene; toxicity; albino mice
      Issue No: Vol. 8
       
  • Journal Cover Page

    • Authors: Journal Editor
      Abstract: Journal Cover Page
      Issue No: Vol. 8
       
  • Preparation and Characterization of Silica Material from Rice Husk Ash
           – An Economically Viable Method

    • Authors: A. Ananthi, D. Geetha P. S. Ramesh
      Abstract: Rice husk is a form of agricultural biomass that provides an abundant silicon source. Rice husks are widely burnt in agricultural fields in India because it is difficult to find other uses for them. Farmers burn rice hulls usually under incomplete combustion conditions to avoid accidental fires. The objective of this study was to develop a new method of amorphous silica was prepared from rice husk ash by sol - gel method. Initially received from Rice husk ash was calcined at 4000C, 5000C, 6000C and 7000C for 5 hrs to remove the volatiles in the sample and determine the amorphous structure of SiO2. Next, the thermally treated RHA was mixed with alkali solution to produce sodium silicate solution and precipitated silica was produced by the neutralization of sodium silicate solution. Rice Husks soaked in nitric acid produced the maximum amount of the sodium silicate solution and precipitated silica. Sodium oxide (Na2O) content and silica (SiO2) content in the sodium silicate solution were also determined. Extracted precipitated silica particles were characterized by Fourier transform infrared (FTIR), X-Ray diffraction and Optical microscopy techniques. The chemical composition of silica was confirmed by FTIR and SEM with EDX.. Highly pure amorphous silica was derived from rice husk ash was confirmed by XRD pattern. The morphology of the obtained materials was analyzed by SEM. At optimized conditions, a nano sized highly pure silica was produced with a high reactivity and 99.9% amorphous in form. This economic technology as applied to waste material also provides many benefits to the local agro industry. Thus this paper may be providing a low cost and simple method to prepare functional materials. Keywords: Rice husk ash, Silica gel, Minerals, Amorphous material, Agricultural bio-waste
      Issue No: Vol. 8
       
  • Monitoring of Industrial Waste Disposal by the Use of Computer-Developed
           Models: A Case Study of the Jakara Waste-Water Channel in Kano Metropolis,
           Kano State, Nigeria

    • Authors: Timothy Akpomie, Mohammed Adamu, Eno Ekanem
      Abstract: The concentrations of four heavy metals (Fe, Cd, Cu and Pb), from a previous study, on the determination of pollutants in waste-water samples along the Jakara waste-water channel in Kano metropolis were modelled using the Minitab statistical software. This was with the view of obtaining a model that would estimate and forecast the extent of pollution by the continuous discharge of industrial sewage on the canal. Though the initial concentrations of these metals were higher than the acceptable limits for sewage disposal by the World health organization (WHO), the obtained models showed that the concentrations of the respective heavy metals were increasing in a quadratic manner with time. Furthermore, from an initial concentration of 21.45, 3.58, 3.78 and 2.87mg/l for each respective heavy metal in the year 2008, the obtained models forecasted the concentrations at 95% confidence level, to be 15, 56, 30 and 35 times higher than their initial concentrations respectively by the year 2013. Finally, the order for this bioaccumulation was found to be Cd > Pb > Cu > Fe. The predicted concentrations would be indicative of the degree of bioaccumulation of these metals by vegetables if irrigated from this wastewater source. Keywords: Bio-accumulation, Bio-magnification, Chemo metrics, geo-accumulation, Models, waste-water
      Issue No: Vol. 8
       
  • Isolation and Identification of Methyl cinnamate from Syrian Ocimum
           Basilicum

    • Authors: Shaza Sitrallah Joumaa Merz
      Abstract: A phytochemical study of Ocimum Basilicum, a plant collected from AL-Hasakah area in Syria, led to isolate and identified the  methyl  cinnamate 1 from the chloroform extract. The purification, the isolation and the structural identification of this compound was achieved by means of the chromatographic (CC and TLC) analysis and the spectroscopic: nuclear magnetic resonance with different applications (1H-NMR, 13CNMR, COSY, HMQC, HMBC) and FT-IR spectroscopy. Keywords:  Ocimum basilicum, Methyl cinnamate, 1H-NMR, 13CNMR,
      Issue No: Vol. 8
       
  • Determination Vit C in Food Samples using High Performance Liquid
           Chromatography

    • Authors: Ramla Abdullah
      Abstract: Vit C has C6H8O6 chemical formula ,white crystal , water soluble , nutrition value and antioxidant, has an important factor to skin different type of  tissues and bones . Quantity required to individual from this vitamin depend on: age, gender  and healthy status . Many different  analytical    methods   has been  done  to determine quantity  in substances containing [vit C, such as: (titration , spectrophotometer, electrochemical and chromatographic) methods .....
      Issue No: Vol. 8
       
  • Preparing CaBi2O4 by Solid State Method and Studying Its Structural
           Properties

    • Authors: Oviliakabak RiadTali
      Abstract: The compound CaBi2O4 was  synthesized by solid state reaction and studied by X-ray powder diffraction method, Infra-red spectroscopy (IR) , Differential thermal analysis (DTA) .The values d and hkl indexes were calculated. The discussion indicate that, the compound belongs to monoclinic type of crystallization.The parameters  a= 14.007 (Ao) ,b=11.551(Ao), c=12.264 (Ao),the volume of unit cell was V= 1944.064 (Ao)3, theoretical and experimental densities were  identified. Z=8. Keywords: x-rays, calcium bismuths , solid state..
      Issue No: Vol. 8
       
  • Preparation and Characterization of Various Interstitial N-Doped TiO2
           Catalysts from Different Nitrogen Dopants for the Treatment of Polluted
           Water

    • Authors: M. A. Shehata, Sayed A. Shama, Sawsan A. Mahmoud, M. M. Doheim
      Abstract: In this work N-doped TiO2 nano particle photocatalysts were prepared through a sol-gel procedure using three different types of nitrogen dopants urea, diethanolamine (DEA) and triethylamine (TEN). Multiple techniques (XRD, TEM, SEM, EDX, BET, Raman and UV-Visible absorption) were commanded to characterize the crystal structure of N-doped TiO2. The catalytic activity of the N-doped TiO2 under ultraviolet (UV) and visible light irradiation is evidenced by the decomposition of 2-chlorophenol, showing that nitrogen atoms in the N-doped TiO2 are responsible for the visible light catalytic activity. It is suggested that doped nitrogen here is located at the interstitial site of TiO2 lattice. Amongst investigated nitrogen precursors diethanolamine provided the highest visible light absorption ability of interstitial N-doped TiO2 with the smallest energy band gap and the smallest anatase crystal size, resulting in the highest efficiency in 2-cholorophenol degradation. The photocatalytic activity and 2-CP mineralization ability of all N-doped TiO2 can be arranged in the following order:  TiO2/DEA > TiO2/TEN > TiO2/UREA > un-doped TiO2. Keywords: 2-chlorophenol, Photocatalytic degradation, N-doped TiO2, Different Nitrogen Dopants, urea, diethanolamine (DEA), triethylamine (TEN) and Catalytic Activity.
      Issue No: Vol. 8
       
 
 
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