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  Subjects -> CHEMISTRY (Total: 836 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (586 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (26 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (46 journals)
    - PHYSICAL CHEMISTRY (68 journals)

CHEMISTRY (586 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 5)
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: 27)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 16)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 17)
ACS Macro Letters     Full-text available via subscription   (Followers: 20)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 24)
ACS Nano     Full-text available via subscription   (Followers: 203)
ACS Photonics     Full-text available via subscription   (Followers: 6)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 11)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 5)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 6)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 11)
Advanced Functional Materials     Hybrid Journal   (Followers: 40)
Advanced Science Focus     Free   (Followers: 1)
Advances in Chemical Engineering and Science     Open Access   (Followers: 24)
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: 17)
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: 14)
Advances in Nanoparticles     Open Access   (Followers: 11)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Polymer Science     Hybrid Journal   (Followers: 37)
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: 6)
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)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access  
Ambix     Hybrid Journal   (Followers: 2)
American Journal of Applied Sciences     Open Access   (Followers: 29)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 91)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
American Journal of Chemistry     Open Access   (Followers: 20)
American Journal of Plant Physiology     Open Access   (Followers: 10)
American Mineralogist     Full-text available via subscription   (Followers: 8)
Analyst     Full-text available via subscription   (Followers: 37)
Angewandte Chemie     Hybrid Journal   (Followers: 20)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 140)
Annales UMCS, Chemia     Open Access   (Followers: 2)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access  
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: 6)
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: 12)
Anti-Infective Agents     Hybrid Journal   (Followers: 1)
Antiviral Chemistry and Chemotherapy     Full-text available via subscription  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 4)
Applied Spectroscopy     Full-text available via subscription   (Followers: 15)
Applied Surface Science     Hybrid Journal   (Followers: 23)
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: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 160)
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: 18)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 6)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 29)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 23)
Bioorganic Chemistry     Hybrid Journal   (Followers: 5)
Biopolymers     Hybrid Journal   (Followers: 16)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 3)
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 14)
C - Journal of Carbon Research     Open Access  
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: 2)
Carbohydrate Research     Hybrid Journal   (Followers: 11)
Carbon     Hybrid Journal   (Followers: 74)
Catalysis for Sustainable Energy     Open Access   (Followers: 3)

        1 2 3 4 5 6 | Last

Journal Cover   Chemistry and Materials Research
  [10 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]
  • Alumino-Silicate Mineral Material for Ceramic Manufacturing Industries

    • Authors: Deriye Jide
      Abstract: Intensively, fireclay deposits were found within ijero-Ikoro areas specifically. The mineral resources of Ekiti state have not being fully appraised due to insufficient research works and poor intensive studies. While the localization of these minerals is by geological formation of minerals within the basement and quaternary deposits as found in the state. Scanty researches and little studies have identified very few number of mineral deposits in the state since 1942.  For example, fireclay as residentially found contained profile of sand, kaolin and lateritic clays within the top soils of various huge deposits that could be industrially and constructively useful. Other  minerals  found within the axis include Feldspar at Ikoro. Gold and Quartz were also found at Efon and Itawure respectively. Feldspar and Gemstone were obtained at Okeowu, Ikoro and Ijero intensively. Industrial mineral axis was technically examined under this present study where valuable minerals that were largely unevaluated before were currently evaluated for Ekiti state economic growth and development. More so, the paper reviews and updates the mineral potentials within the basement rocks and quaternary alluvial deposits as found within Ijero-Ikoro-Okemesi-Efon-Alaye-Aramoko geological formation specially for Ekiti State industrialization. Keywords: Minerals, Evaluation, Usage, Industrialization
      Issue No: Vol. 7
       
  • Microwave Assisted Synthesis, Characterization and Antibacterial Study of
           Some Novel Schiff's Bases, Thaizolidinone and Chalcone Compounds
           Derived from Mefenamic Acid

    • Authors: Zeki A. Naser Al-Shamkhani, Hanan A. Al-Hazam, Suha K. Al-Mosawi
      Abstract: This work involves synthesis of some new heterocyclic compounds including thaizolidinone compounds. The new Schiff bases derived from mefenamic acid, which was synthesized by microwave irradiation of mefenamic acid with hydrazine hydrate in absolute ethanol and this amino compound condensation with different aromatic aldehydes in absolute ethanol. Thaizolidinone compounds were synthesized by cycloaddition reaction of mercapto acetic acid to imine group of Schiff bases in dry benzene. The new chalcone derivatives synthesized by the reaction aldehyde with their compounds.  M.P., TLC, CHN, UV, FTIR and NMR spectroscopy has characterized all the synthesized compounds. The biological screening data of the synthesized compounds were also studied. Keywords: Schiff bases, thaizolidinone, chalcone, antibacterial.
      Issue No: Vol. 7
       
  • Survey in Nuclear Magnetic Resonance Spectroscopy

    • Authors: Nagham Mahmood Aljamali, Nuha Salman Salih
      Abstract: Over the past fifty years nuclear magnetic resonance spectroscopy, commonly referred to as NMR, has become the preeminent technique for determining the structure of organic compounds. Of all the spectroscopic methods, it is the only one for which a complete analysis and interpretation of the entire spectrum is normally expected. Although larger amounts of sample are needed than for mass spectroscopy, NMR is non-destructive, and with modern instruments good data may be obtained from samples weighing less than a milligram. To be successful in using NMR as an analytical tool, it is necessary to understand the physical principles on which the methods are based. Keywords : NMR , spectra , spin , nuclear , magnetic , data.  
      Issue No: Vol. 7
       
  • Study the Addition of Styrene–Butadiene Rubber Latex on the
           Workability and Flexural Strength of Crumb Rubber-Mortar

    • Authors: Ali I. Mohsin, Besma M. Fahad
      Abstract: In this research different mixes were prepared with Cement-Sand ratio (1:3) and Water- Cement (0.5) by weight. Four sets were prepared by partially or full replacing the sand with crumb rubber tire to fabricate the Crumb Rubber-Mortar mixtures. The first  two sets include fine crumb rubber with particles size (0.3-1 mm), The other set include coarse crumb rubber with particles size (1.18-2.36 mm).The second two sets were prepared as the same first sets but with the addition of (7%) SBR latex by weight of cement. Each set was consist of different percentage of replacing the sand by crumb rubber (10,30,50,100%) by volume. Tests were conducted, both in fresh and in hardened state. fresh state test included workability, while hardened state test included flexural strength. Several results were obtained and it was including that the fineness of Crumb Rubber-Mortar play a major role in measuring workability and flexural strength and the addition of SBR to Crumb Rubber-Mortar improve the properties also the increase in crumb rubber percentage cause decrease in flexural strength and workability of fine Crumb Rubber-Mortar, while the increase in crumb rubber percentage cause increase in workability of coarse Crumb Rubber-Mortar. Keywords: Mortar, Recycled Crumb Rubber, Styrene–Butadiene Rubber, Workability, Flexural Strength, Particles Size.
      Issue No: Vol. 7
       
  • Comparison of Antioxidant Capacity of Mango (Mangifera indica), Pawpaw
           (Asimina triloba) and Guava (Psidium guajava) Pulp Extracts at Different
           Maturation Stages

    • Authors: S. C. Ortutu, M. O. Aremu, S. S. Bako
      Abstract: The total polyphenols, flavonoids, lipid-soluble antioxidants (CALT) and radical scavenging ability of the pulp extracts of mango (Mangifera indica), pawpaw (Asimina triloba) and guava (Psidium guajava) were investigated at different maturation stages for the purpose of determining the antioxidant capacity and the possibility of using these fruits at every maturation stage for the prevention of lipid oxidation. The pulps of these fruits were extracted at different maturation stages; unripe (UR), about to ripe (AR) and ripe (RP). The extracted pulps were freeze-dried and used for the analyses. The total phenolic content was determined by spectrophotometry (Folic Ciocalteu’s method) while 1, 1-diphenyl-2-picrylhydrazyl (DPPH) was used for the radical scavenging ability. The various antioxidant activities were compared with standard antioxidants such as gallic acid, rutin, α-tocophenol and ascorbic acid. The results showed that all the fruits investigated at different maturation stages possessed high quality antioxidants (those that can scavenge free radicals, function as metal chelators or donate hydrogen atoms). Radical scavenging ability of the fruit pulps was significantly affected (P < 0.05) by the different maturation stages. The unripe fruits (mango, pawpaw and guava) have the highest antioxidant properties suggesting that the antioxidant capacity of the fruits decreased as the fruits ripened. Keywords: Fruits, antioxidant capacity, maturation stage.
      Issue No: Vol. 7
       
  • Synthesis and Thermal Characterization of Copolymers Containing Amino
           Acids

    • Authors: Ali Kareem A. Al-Lami, Alaa Abbas Ibadi, Hawraa H. Radey
      Abstract: Thee copolymers of amino acid were synthesized in two steps. First, the amino acids react with resorcinol to formation of azo monomers step. They led in a second condensation polymerization step to copolymeric materials. The structures of the copolymers were characterized by means of FT-IR and 1H-NMR spectroscopy. The thermal properties were investigated by TGA and DTG. Keywords: copolymers, amino acid, thermal properties, azo compound
      Issue No: Vol. 7
       
  • Use of Mercury Intrusion Porosimetry (MIP) Technique to Measure the
           Porosity of Anodes in Solid Oxide Fuel Cell (SOFC)

    • Authors: Syed Mubashar Hassan, Syed Ali Hasnain
      Abstract: The present research is aimed to calculating the porosity of anodes in solid oxide fuel cell through Mercury Intrusion porosimetry (MIP). There are various techniques used to measure the porosity of the solid oxide fuel cell (SOFC). MIP is a method used to find the porosity of anodes due to its high accuracy, and some additional information which includes particle size distribution, pore size distribution, average pore size and bulk density. The working principal of MIP is that when sample is filled with mercury then high pressure is applied which makes the mercury to penetrate into the pores of the sample. The instrument measures the pore volume with the help of capacitive system as the pressure gradually increases to its maximum value and then decrease to its lowest value. This system calculates the volume of mercury intruded for each pressure whether the pressure is increasing or decreasing. The instrument is connected to a computer with dedicated software which calculates the percentage porosity of the sample. The results suggested the importance of PH and agitator on porosity. What we have to provide is the sample mass, sample density and the temperature of the laboratory. However for cleaning purposes of mercury, ethanol could be used instead of acetone, as mercury intrusion porosimeter involves few plastic parts like dilatometer holder and cap. Whereas acetone has catastrophic effect on them, and these parts are very expensive to replace. Keywords: Mercury, Intrusion, Solid oxide, Fuel cell, Porosity, Anodes, Porosimetry
      Issue No: Vol. 7
       
  • Synthesis and anticancer activity evaluation of Novel 6 mercaptopurine
           derivatives.

    • Authors: Kawkab Y. Saour, Shalal M. Hussein, Ahmed D Jassim
      Abstract: A series of five (6- mercaptopurine derivatives) have been synthesized as disulfide, Schiff base, Oxadiazole and amide products and the activity as anticancer was evaluated against three types of cancer lines. The pilot studies indicated that compound 1, 2, 3, 4 and 5 were the active compounds, but only compound (1) reviewed in detail .The reaction progress and products purity were checked by thin layer chromatography. The target chemical structures of compounds and intermediates were proved by their physicochemical properties as melting points, infrared spectroscopy, and elemental microanalysis (CHNS) and proton nuclear magnetic resonance (H1NMR)  Keywords: cancer, 6 -mercaptopurine, disulfide, penicillamine
      Issue No: Vol. 7
       
  • Sedimentary Mineral Depositions for Economic Development

    • Authors: Aderiye Jide, Akinwamide Emmanuel Oluwasola
      Abstract: Sedimentary minerals, clays, fireclays, quartz; silica sand; precious stones and granitic rocks are numerous within an axis of Ekiti-state. Intensively, fireclay deposits are found within ijero-Ikoro areas specifically.The mineral resources of Ekiti state have not been fully appraised due to insufficient research works and poor intensive studies. While the localization of these minerals is by geological formation within the basement and quaternary deposits. Scanty researches and little studies have identified very few number of mineral deposits in the state from 1942 till date. For example,  fire clay as found contains profile of sand, kaolin and lateritic clays within the top soils of various huge deposits that are industrially and constructively useful. Other resources or minerals as found within the axis include Feldspar at Ikoro, gold and quartz are found at Efon and Itawure respectively. Feldspar and Gemstone are obtainable at Okeowu, Ikoro and Ijero intensively. Factually, the industrial mineral axis is technically examined under the present study. Where valuable minerals that are largely unevaluated before is technically evaluated for the industrial uses of Ekiti state economic growth and development. More so, the paper reviews and updates the mineral potentials within the basement rocks and quaternary alluvial deposits as found within the rock type area along  ( Ijero-Ikoro-Okemesi-Efon-Alaye-Aramoko) geological formation axis  for the economic growth and rapid development of Ekiti State.
      Issue No: Vol. 7
       
  • Preparation of Novolac composites with improved properties for disk brake
           systems

    • Authors: Roola A.K. Abbass, Mahmood M. Barbooti, Abeer M. Abdul-Aziz
      Abstract: The effect of composition and the dry and wet operating conditions on the adhesive wear resistance of polymeric composite materials were studied in this work. The composite are designed to be used as pads for disc brake system of heavy vehicles. The composites were prepared with weight ratios, Ψ, in the range: 60-90% using the dry method. The composites were reinforced with a number of fillers and friction improvement agents like:  silicon carbide, carbon fibers, alumina, etc at various ratios to establish diverse properties in comparison with Novolac resin. The used ceramic disc brake materials were also utilized in this preparation at certain weight ratios as one of the components of the composites. The wear resistance measurements indicated that a ratio higher than 70% will reduce the hardness of the disc material. Thus, composites with 60% Novolac weight ratio, which indicated the best performance, were prepared with 14-22% of the hardener, the HMTA. The study revealed that the abrasion rate decrease with the reinforcement of the Novolac, i.e., increase in abrasion resistance, especially when the carbon fibers ratio were increased from 1.5 to 3.0%. Meanwhile, the increase of the hardener resulted in increase in the in wear resistance. Further, it appears that the rate of abrasion changes from moderate to in accordance with operating conditions like the applied load, operating time and sliding distance. To mimic the real application conditions, the specimens were subjected to rain water by spraying for 2 min during operation. The wetting caused a lowering of the wear resistance. However, in comparison with the available disc brake materials, our specimens proved either comparable or better performance. Keywords: Novolac composites, wear resistance, brake pads, rain water,
      Issue No: Vol. 7
       
  • Journal Coverpage

    • Authors: Journal Editor
      Abstract: .
      Issue No: Vol. 7
       
  • Experimental (FT-IR and FT-Raman spectra) and Theoretical (Ab initio/HF,
           

    • Authors: Jamelah S. Al-Otaibi
      Abstract: The Fourier transform infrared (FT-IR) and FT-Raman spectra of 2-amino-5-chloropyridine (2A5CP) and 2-amino-6-chloropyridine (2A6CP) have been recorded in the regions 4000–400 cm-1 and 4000–100 cm-1, respectively. The observed FT-IR and FT-Raman data, a complete vibrational assignment and analysis of the fundamental modes of the compounds were carried out. All the geometrical parameters have been calculated by HF and DFT (B3LYP) methods with 6-311++G (d, p) basis set. The vibrational wavenumbers, IR intensities and Raman activities are calculated at the same theory levels used in geometry optimization. The calculated frequencies are scaled and compared with experimental values. The scaled B3LYP/6-311++G(d,p) results show the best agreement with the experimental values. The calculated HOMO–LUMO energies show that charge transfer occurs in the molecules. Keywords: FT-IR, FT-Raman, ab initio, DFT, 2-amino-5-chloropyridine, 2-amino-6-chloropyridine.
      Issue No: Vol. 7
       
 
 
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