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  Subjects -> CHEMISTRY (Total: 814 journals)
    - ANALYTICAL CHEMISTRY (49 journals)
    - CHEMISTRY (566 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (25 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (46 journals)
    - PHYSICAL CHEMISTRY (65 journals)

CHEMISTRY (566 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 4)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 31)
ACS Catalysis     Full-text available via subscription   (Followers: 25)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 13)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 8)
ACS Macro Letters     Full-text available via subscription   (Followers: 20)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 25)
ACS Nano     Full-text available via subscription   (Followers: 355)
ACS Photonics     Full-text available via subscription   (Followers: 6)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 9)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 6)
Acta Chromatographica     Full-text available via subscription   (Followers: 10)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 4)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 10)
Advanced Functional Materials     Hybrid Journal   (Followers: 38)
Advances in Chemical Engineering and Science     Open Access   (Followers: 23)
Advances in Chemical Science     Open Access   (Followers: 9)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 15)
Advances in Drug Research     Full-text available via subscription   (Followers: 18)
Advances in Enzyme Research     Open Access  
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 13)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 16)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Polymer Science     Hybrid Journal   (Followers: 39)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 10)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 4)
African Journal of Chemical Education     Open Access   (Followers: 1)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 5)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 1)
Alchemy     Open Access   (Followers: 3)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access  
American Journal of Applied Sciences     Open Access   (Followers: 31)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 213)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 12)
American Journal of Chemistry     Open Access   (Followers: 18)
American Journal of Plant Physiology     Open Access   (Followers: 10)
American Mineralogist     Full-text available via subscription   (Followers: 7)
Analyst     Full-text available via subscription   (Followers: 36)
Angewandte Chemie     Hybrid Journal   (Followers: 18)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 273)
Annales UMCS, Chemia     Open Access   (Followers: 2)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 1)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 2)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 10)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 11)
Anti-Infective Agents     Hybrid Journal   (Followers: 1)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 4)
Applied Spectroscopy     Full-text available via subscription   (Followers: 12)
Applied Surface Science     Hybrid Journal   (Followers: 20)
Arabian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 4)
Autophagy     Full-text available via subscription   (Followers: 1)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 261)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal   (Followers: 1)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 4)
Bioinspired Materials     Open Access  
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 17)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 5)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 30)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 24)
Bioorganic Chemistry     Hybrid Journal   (Followers: 5)
Biopolymers     Hybrid Journal   (Followers: 14)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 13)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 1)
Carbohydrate Research     Hybrid Journal   (Followers: 11)
Carbon     Hybrid Journal   (Followers: 55)
Catalysis for Sustainable Energy     Open Access   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 6)
Catalysis Science and Technology     Free   (Followers: 4)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 7)

        1 2 3 4 5 6 | Last

Journal Cover   Chemistry and Materials Research
  [12 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2224-3224 - ISSN (Online) 2225-0956
   Published by International Institute for Science, Technology and Education (IISTE) Homepage  [30 journals]
  • In-Situ Deposition, Optical Characterization and Bandgap Shift of AgO Thin
           Films

    • Authors: Ifeanyichukwu Chinedu Amaechi
      Abstract: Porous and specularly reflective films of inorganic silver oxide (AgO) with thickness ranging from 275-435nm have been deposited by chemical bath (CBD) in a mixed solution of silver nitrate AgNO3 and precursor of triethanolamine (TEA) maintained at a temperature of 318K. Surface morphology of the films was characterized by scanning electron microscopy (SEM). Optical and structural studies were performed to find the optical attenuation, some solid state properties and crystallographic structure for the individual films. High quality films with low transmittance < 11.50% in the visible and near infrared (NIR) region are obtained. Direct optical bandgap for the films lies in the range 1.5-1.7eV, whereas the refractive index developed peak in the dispersion region near 450nm. X-ray diffraction study indicates that the films composed of polycrystalline AgO with cubic structure belonging to the space group, fm3m. Keywords: Inorganic silver oxide, Triethanolamine (TEA), X-ray diffraction, Transmittance.
      Issue No: Vol. 7
       
  • Study of the Dielectric Dispersion Phenomena for Al2O3/Al Cermet Composite
           at Room Temperature

    • Authors: Abd Al Hameed Mahdi, Hanan Mustafa
      Abstract: A cermet composite Al2O3/Al had been prepared in different concentrations of Aluminum metal (0, 10, 20, 30, 40, 50) Wt%, the samples have been formed at pressures (50, 100, 150) bar into pellets with diameter (15) mm and thickness (4) mm by cold pressing, the sintering temperature 800 °C for 2 hrs. in vacuum,  physical, microstructure, dielectric properties were studied, physical tests showed that as the concentration of Al increased, the practical density decreased and the porosity decreased also specially at the region of concentration from 40% to 50% of Al, the microstructure shows the liquid phase is happening, dielectric measurement shows that the dielectric constant, loss factor and loss tangent were decreased as increasing frequency. Keywords: Cermet, Alumina, Compaction Behavior, Dielectric dispersion.
      Issue No: Vol. 7
       
  • Adoption of Information Communication Technology on Teaching and Learning
           in Public Pre-Schools in North Rift Region, Kenya

    • Authors: Nelly C. Andiema
      Abstract: To achieve vision 2030, the Kenyan Government had an ambitious plan to give laptops to school children which was however opposed by parents and various stake holders who said that the money for the computers should instead go toward raising teachers' salaries and feeding children.  Given that the implementation of ICT in teaching pre-school learners has worked in various parts of the world, it is prudent to investigate; adoption of ICT in the Kenyan context.The purpose of this study was to evaluate the effect of adoption information communication technology on teaching in pre-schools in North Rift Kenya. The study is informed by diffusion of innovation theory. The study used combination of cross-sectional and descriptive survey   and   explanatory   research   design. The study employed stratified sampling. To collect primary data, questionnaires and interview schedules was used. Quantitative data collected was analyzed using descriptive statistical techniques which were frequencies, mean, standard deviation. The researcher used inferential statistics Pearson correlation to show the relationships that existed between the variables. Pearson correlation was used to assess the linear relationship between variables. The findings of the study showed that skilled teachers in ICT have a higher likelihood of using it in the classroom. Moreover, teachers’ knowledge together with a positive attitude towards ICT plays a key role in the adoption and use of ICT in schools.  The teachers trained to teach ICT are not sufficient to facilitate its adoption. Not to mention the fact that schools in the rural areas lack basic necessities such as electricity and ICT facilities which inhibit the adoption of ICT. Schools need to avail opportunities for teachers to expand their knowledge and skills on ICT Keywords: Information Communication Technology, pre-school curriculum, Teacher’s preparedness teachers, Skills and competences
      Issue No: Vol. 7
       
  • Modelling of Short Corrosion Crack Growth of Low-Alloy Steel in a Chemical
           environment

    • Authors: Mahir H. Majeed
      Abstract: This study aims to develop a theoretical model for short corrosion crack growth rate happen in some of pre-cracked specimens made of three types of low-alloy steel. The selected material is widely used in boiler pipes of electrical power plants. An experimental system was established to simulate the real work conditions, so the specimens subjected to dynamical loading procedure under different chemical environment conditions at different testing temperatures. The results described the behavior of the material under the testing conditions, and showed that the crack growth rate was accelerated due to corrosion contribution, especially at high temperatures, so the classic mechanical crack growth rate under air at room temperature may be neglected as compared with that resulted due to corrosion and temperature interaction. A mathematical model was developed beginning from the superposition model to describe the total crack growth rate of the pre-cracked specimens, depending on many of introduced parameters, such as corrosion density, water chemistry, time of test, crack geometry, loading frequency, stress intensity, velocity of environment liquid motion through the crack walls, and thermal activation energy due to difference in test temperatures. Furthermore, some of important conclusions were outlined. Keywords: corrosion fatigue crack, crack growth, mathematical model
      Issue No: Vol. 7
       
  • Separation And Determination Of Benzoylated Polyamines (Spermidine
           Andspermine) Using Hplc Techniqe

    • Authors: Mohammed A. K. Alsouz
      Abstract: A simple and sensitive reversed-phase high performance liquid chromatography (Rp -HPLC) was developed for separation and determination of polyamines (Spermidine and Spermine). Derivatization of polyamines was improved by dissolving benzoyl chloride in methanol to increase the detection of UV-Visible detector at ? max. 254  nm. The benzoylated polyamines eluted by Rp- HPLC using methanol : water (52 : 48) as mobile phase. The detection limited of this method is (50ng/ml) .The separation was performed on BDS-DB (250 x 4.6 mm I.D) column at flow rate 1 ml/ min. using standard solutions. The retention time of two compounds (Spermidine and Spermine) were (7.7 , 8.5 min.) respectively, this method suggested that monitoring the Spermidine and Spermine compounds could play an important role in diagnosis of different types of carcinoma and fallow up chemo and radiotherapy treatments.
      Issue No: Vol. 7
       
  • Natural Dye Sensitized Solar Cells of Ocium Lamifolium and Tagets Patula
           Based on Metal Oxide Nanocomposite in Quasi Solid State Electrolyte

    • Authors: Megersa Feyissa Mideksa
      Abstract: Nanocomposite of Sn-Zn oxide from their respective precursor salts was prepared by impregnation method. The prepared nanocomposite was characterized by UV-Vis to estimate optical absorption and energy band gaps and X-ray Diffraction to determine particle size. Absorption spectra of the natural dyes were measured and both ethanol extracts of natural pigments absorbs in the visible region. Morphology of the as-synthesized nanocomposite was characterized by Scanning Electronic Microscopy and Energy-Dispersive X-ray for elemental analysis. The solar energy conversion efficiency of the as-synthesized nanocomposite sensitized by the natural dyes of Ocium Lamifolium and Tagets Patula extracted by ethanol were measured. The best device parameter was achieved by the ethanol extract of Tagets Patula and SnO2/ZnO nanocomposite semiconductor. The percent incident to photon conversion efficiency of the sensitized nanocomposite was measured at light intensity of 100 mW/cm2 with highest value 9.30 at 320 nm the highest value percent of fill factor was 65.25 by SnO2/ZnO semiconductor and Tagets Patula dye. Keywords: semiconductor, impregnation, natural dye, dye sensitized solar cells.
      Issue No: Vol. 7
       
  • Separation and Determination of Benzoylated Polyamines (Spermidine
           Andspermine) using HPLC Techniqe

    • Authors: Mohammed A. K. Alsouz
      Abstract: A simple and sensitive reversed-phase high performance liquid chromatography (Rp -HPLC) was developed for separation and determination of polyamines (Spermidine and Spermine). Derivatization of polyamines was improved by dissolving benzoyl chloride in methanol to increase the detection of UV-Visible detector at ? max. 254  nm. The benzoylated polyamines eluted by Rp- HPLC using methanol : water (52 : 48) as mobile phase. The detection limited of this method is (50ng/ml) .The separation was performed on BDS-DB (250 x 4.6 mm I.D) column at flow rate 1 ml/ min. using standard solutions. The retention time of two compounds (Spermidine and Spermine) were (7.7 , 8.5 min.) respectively, this method suggested that monitoring the Spermidine and Spermine compounds could play an important role in diagnosis of different types of carcinoma and fallow up chemo and radiotherapy treatments.
      Issue No: Vol. 7
       
  • Antibacterial Activity of the Crude Phenolic, Alkaloid and Terpenoid
           Compounds Extracts of Lactuca serriola L. on Human Pathogenic Bacteria

    • Authors: Ali Hussein Al-Marzoqi, Hussein J. Hussein, Nebras M. Sahi Al-Khafaji
      Abstract: Objective: To reveal the effect of the crude phenolic, alkaloid and terpenoid compounds extracts of Lactuca serriola L. on some Human Pathogenic Bacteria.Methods: Antibacterial activities of the crude Phenolic, Alkaloid and Terpenoid of medicinal plant were determined by in vitro by agar diffusion-method against some human pathogenic bacteria.Results: obtained results showed that among nine pathogenic bacteria, only Staphylococcus aureus and Staphylococcus saprophyticus Gram-positive were susceptible for Terpenoid, Alkaloid and Phenolic compounds while Staphylococcus epidermidis was resistant to active compounds.Conclusion: This study demonstrates that we can conclude that the effect of active compounds in same plant has different effect on different pathogenic organisms in different concentration. Keywords: Antibacterial Activity; Lactuca serriola L; Pathogenic Bacteria
      Issue No: Vol. 7
       
  • Spectrometric Detection of Organic Compounds and Toxicity of Ethanolic
           Leaves Extracts of Prosopis Juliflora

    • Authors: Wamburu R.W., Kareru P.G., Mbaria J.M., Nyaga G., Rechab S.O.
      Abstract: Spectrometric detection of saponins, tannins and alkaloids in Prosopis juliflora using Fourier Transform Infrared (FTIR) spectroscopy is reported in this paper. Crude dry plant powders and corresponding ethanolic extracts were mixed with potassium bromide (KBr) powder and compressed to a thin pellet for infrared examination. The plant powders, ethanolic extracts and leaves ethanolic extract (LEE) fractions  exhibited characteristic infrared spectra due to various functional groups –OH, -C=O, C-H, and C=C absorptions. Phytochemical analysis confirmed the presence of saponins, tannins and alkaloids in the tested specimens. Prosopis juliflora whole plant parts were used as a reference sample. Toxicity and safety levels of P. juliflora were also investigated. Acute and sub-acute toxicity of P. juliflora ethanolic leaves extract was evaluated using Swiss albino rats. All clinical signs and symptoms were recorded within 24 hours. These results indicated that direct detection of bioactive compounds was possible by infrared analysis. Toxicity symptoms were moderately observed and post mortem did not show any major gross effects on the internal organs. Keywords: Prosopis juliflora, infrared examination, potassium bromide, acute and sub-acute toxicity, clinical signs, doses, symptoms.
      Issue No: Vol. 7
       
  • Electrochemical Linear Polarization Studies of Amodiaquine Drug as a
           Corrosion Inhibitor for Mild Steel in 0.1M HCL Solution

    • Authors: I. A. Akpan, N. O. Offiong
      Abstract: The effect of amodiaquine on corrosion of mild steel in hydrochloric acid was investigated by linear polarization resistance (LPR) electrochemical method. The results indicated that corrosion inhibition efficiency and degree of surface coverage were increased with rise in the concentration of amodiaquine. The inhibitor followed monolayer chemisorption since it obeyed the Langmuir adsorption isotherm. Keywords: linear polarization resistance (LPR), amodiaquine drug, corrosion inhibitor, mild steel, HCl
      Issue No: Vol. 7
       
  • Elution Protocols of Intracellular Bacteriocarotenoid Extracts

    • Authors: AKINNUOYE Olawale Faith-Anthony
      Abstract: Bacteriocarotenoids of thermophilic species of Rhodopseudomonas palustris isolated from a well of hot spring in Malaysia was extracted and characterized. Multiple spectrophotometeric absorption maxima of the bacteriocarotenoid, thin-layer chromatography and confirmatory high performance liquid chromatography (HPLC) were used in the mapping, separation and identification of the extracts from bulk-bacteriocarotenoid extracts. Results of the TLC detections with glowing spots of reddish isolated compounds at distinct Rf under low radiation UV lamp, indicated the presence of bacteriocarotenoids. Moreover, results from HPLC analyses did identify two of the extracts as ?-carotene with spectral detections at 450 nm, 474 nm wavelengths, and rhodopin with spectral detections located at 453nm, 482 nm, 521 nm wavelengths. Keywords: Rhodopseudomonas palustris, Bacteriocarotenoid, Elution, Eluate, Thin-layer chromatography
      Issue No: Vol. 7
       
 
 
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