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  Subjects -> CHEMISTRY (Total: 792 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (552 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (24 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (42 journals)
    - PHYSICAL CHEMISTRY (64 journals)

CHEMISTRY (552 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: 17)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 25)
ACS Nano     Full-text available via subscription   (Followers: 288)
ACS Photonics     Full-text available via subscription   (Followers: 5)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 8)
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: 4)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 4)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 8)
Advanced Functional Materials     Hybrid Journal   (Followers: 35)
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: 14)
Advances in Drug Research     Full-text available via subscription   (Followers: 16)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
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: 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: 4)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alchemy     Open Access   (Followers: 3)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 29)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 178)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
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: 3)
Analyst     Full-text available via subscription   (Followers: 35)
Angewandte Chemie     Hybrid Journal   (Followers: 17)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 230)
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: 12)
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: 19)
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: 220)
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: 10)
Carbon     Hybrid Journal   (Followers: 54)
Catalysis for Sustainable Energy     Open Access   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 5)
Catalysis Science and Technology     Free   (Followers: 4)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 7)
Cellulose     Hybrid Journal   (Followers: 5)

        1 2 3 4 5 6 | Last

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]
  • Synthesis and Characterization of MnO2 as Electrocatalytic Energy Material
           for Fuel Cell Electrode

    • Authors: Subir Paul, Asmita Ghosh
      Abstract: Development Inexpensive  non Pt based  high electrocatalytic energy materials is the need of hour for fuel cell electrode to produce clean alternative green energy from synthesized Bio alcohol  from Biomass.  MnO2 electro synthesized  at different current density is found to be  well performed electrocatalytic material, comparable to Pt, with higher current density, very low over voltage for electrochemical oxidation of methanol . From EIS study, the polarization resistance of the coated MnO2 is found to be much low and electrical double layer capacitance is high, the effect increases with increase in current density of electro deposition. XRD , EDX and AAS analysis confirm the MnO2 deposition, the amount increases with current density. SEM morphology exhibits  enhanced  3D effective substrate area  for electro oxidation of the fuel and a few nano structured grains of deposited MnO2 at higher  current density. The fact  supports an improved electro catalytic property to be applied as high energetic  materials for fuel cell Electrode. Keywords: Electro catalytic ; Energy Material; Fuel Cell: Impedance; Polarization; Electro coating
      Issue No: Vol. 6
       
  • Synthesis, Characterization and Photocatalytic Activity of
           MnO2/Al2O3/Fe2O3 Nanocomposite For Phenol Degradation

    • Authors: Tesfa Oluma Fufa
      Abstract: Photocatalysis has become a fast wastewater treatment technology. Herein; ternary mixed oxide catalyst, phenol pollutant and visible light were used. The new MnO2/Al2O3/Fe2O3 nanocomposite was synthesized by sol-gel method using Fe(NO3)3.9H2O, Al(NO3)3.9H2O, MnO2, 1-C4H9OH and 68 % HNO3 precursors in aqueous solution and characterized by XRD, UV-VIS, FAAS and FTIR instruments. The crystal size and the bang gap energy of MnO2/Al2O3/Fe2O3 nanocomposite were found to be 20 nm and 2.25 eV, respectively. The photocatalytic activity of MnO2/Al2O3/Fe2O3 nanocomposite was tested under varies operational parameters. The optimum operational parameters were found to be 10 pH, 50 mg.L-1 C6H5OH, 20 mg.L-1MnO2/Al2O3/Fe2O3 nanocomposite, visible light presence and 3 hr irradiation time. At optimum operational parameters phenol degradation efficiency was found to be 93.1 %. The kinetic studies indicated that the pseudo first order rate constant was 01.62x10-2 min-1for the phe-vis-cat tests. Finally, the phenol degradation mechanisms were discussed. Keywords: Photocatalysis, MnO2/Al2O3/Fe2O3 nanocomposite, phenol pollutant, visible light and operational parameters.
      Issue No: Vol. 6
       
  • The Titanium and Mixed Titanium Carbon Nanoparticles Supported on Silica
           for Cyclohexene Conversion and of Dyes Removal

    • Authors: Amira Abdalla, Essam Ezzo, Suzan Hassan, Maha Elaiashy
      Abstract: The two samples of  nanoparticles  sulfated titania over silica ST/SiO2 and sulfated titania active carbon over silica  STAC /SiO2 were  synthesized by sol- gel method and characterized by X-ray diffraction XRD , BET , thermal analysis and TEM spectroscopy . The TEM demonstrated that the average particle size of two samples were found to be in the range of (15-50 nm).The ST/SiO2 and STAC/SiO2 have been used as an effective catalyst for cyclohexene disproportionation which STAC/SiO2 catalyst  show much higher selectivity for benzene formation at temperature ranging from 200-280°C. Series of kinetic studies had been conducted for  the removal of acid and basic dyes. The STAC/SiO2 has a considerable potential as an adsorbent for the removal of acidic dye (eosin) than the basic dye (saffranin). Keywords: ST/SiO2 and STAC/SiO2 nanocatalyst, Sol- Gel method ,cyclohexene and dyes.
      Issue No: Vol. 6
       
  • Synthysis, Characterization and Conformation of Some New Macromolecules
           Containing Nitrone Moieties

    • Authors: Meaad A.F. Al-Jassem, Nesreen N. Majeed
      Abstract: Macromolecules containing Nitrone moieties were prepared by oxidation of imines formed by the reaction of terephthaldehyde with diamine compounds using a mixture of hydrogen peroxide and glacial acetic acid. The Nitrone compounds were characterized by CHN analysis, Infra-red and mass spectrometry. Geometrical optimization and calculation of  heat of formation for these compounds confirm that the structure of these compounds is of the E form. Keywords : Macromolecules, Nitrones, Conformation
      Issue No: Vol. 6
       
  • Quantum Mechanical Study of the Kinetics, Mechanisms and Thermodynamics of
           the Gas-Phase Pyrolysis of Isopropyl Bromide

    • Authors: Adeboye; Omolara Olubunmi
      Abstract: Computational studies of the kinetics, mechanisms and thermodynamics of the gas-phase pyrolysis of isopropyl bromide at 623K was studied using PM3 in the semi-empirical and DFT with B3LYP at 6-31G* level methods of calculation. The reaction proved to be a unimolecular reaction and followed a first order rate equation. The calculation showed that the pyrolysis of isopropyl bromide proceeds through a four-membered cyclic transition state which involved a C8-H11 and C4-Br6 bond breaking and H11-Br6 bond making. The Arrhenius parameters, log A (13.6 and 13.8) obtained for both methods are in good agreement with experimental result (13.6). Keywords: semi-empirical, isopropyl bromide, gas-phase, kinetics.  
      Issue No: Vol. 6
       
  • Synthesis and Antimicrobial Activity of Novel of 2,3-Disubstituted
           Quinazolin 4(3H)- One Derivatives

    • Authors: Firyal Weli Asker, Lubna Hazem Nsaif
      Abstract: Aseries of novel derivatives of 2,3-disubstituted quinazolin4(3H)-ones have been synthesized from anthranilic acid and p-methoxybenzoylchloride.The structures of the newly synthesized compounds have been established on the basis of their m.p., TLC, IR,UV,Vis and 1H NMR data.These synthesized  compounds were evaluated for their antimicrobial activity.The results showed that some of these derivatives have good antimicrobal activities when compared with standard antibiotic . Keywords: Quinazolinone, Antimicrobial activity,Azo compound , Azetidinone
      Issue No: Vol. 6
       
  • Synthesis and Study Properties Physical and Biological of Some Dihydrazone
           Derivatives

    • Authors: Ebtihal Qahtan Abdalla Rasheed, Amal Qahtan Abdalla Rasheed, Olfat Abiad Nief, Zainab Naeif Majeed
      Abstract: Synthesis a number of some new of Dihydrazones compounds through condensation of thiocarbohydrozid with substituted aromatic aldehyde by Microwave method. The Microwave methods were unique in being very fast with high yield. Experimental values of viscosity are presented for the mixtures of Dihydrazones compounds with water over the whole mole fraction range at 298.15, 308.15, 318.15 and 328.15 K. The data were used to calculate excess viscosity, 'ln'. The results have been discussed in terms of the nature of solvent-solut interaction in the mixture. The microbial inhibitory effect of the new agents has been assessed in vitro against Gram-positive and Gram-negative bacteria activity. All Dihydrazones have been characterized by IR, 1H NMR, 13C NMR spectra. Keywords: Dihydrazones, microwave irradiation, antibacterial activity, viscosity.
      Issue No: Vol. 6
       
  • Ultrasound Irradiated High-Speed Classical Synthesis and Biological
           Studies of Various N-Substituted Phthaloyl Derivatives

    • Authors: Ebtihal Qhtan Abdullah, Olfat Abiad Nief, Zainab Naeif Majeed
      Abstract: Ultrasound irradiation high-speed and classical synthesis of various N-substituted phthaloyl derivatives as potent bactericidal agents are described. All compound show antibacterial activities when compared with standard drugs.A series of various N-substituted phthaloyl derivatives have been synthesized in a very good yield under irradiation conditions (ultrasound irradiation high-speed) and conventional heat. All compound show antibacterial activities when compared with standard drugs. All compounds have been characterized by IR, 1H NMR and 13C NMR. Keywords: phthalymide, phthalimido dimer, phthalic anhydride, ultrasound irradiation, high-speed synthesis.
      Issue No: Vol. 6
       
  • Quality Improvement of Raw Material of Natural Fibre Preparation using
           Pectinase Enzyme Case Study: The Harvest of Kenaf Fibre in Laren District,
           Lamongan Regency, East Java

    • Authors: Fajar Ciptandi, Kahfiati Kahdar, Agus Sachari
      Abstract: This research focuses on the attempt to improve the quality of kenaf  natural fibers grade-c (low quality). The fibers are harvested from kenaf plantation in Laren District, Lamongan Regency, East Java. This attempt is to enable the fibers to have a good standard of quality, so that it can be made as a potential textile raw material. All this time, quality of grade-c has been considered as a bad quality fiber, therefore, the utilization is merely as gunny sacks, which at the other side, the demand of gunny sacks is reducing each day since there are plastic sacks as the competitor. To improve the quality of kenaf fiber, it is required an experiment process where pectinase enzyme is used in the preparation stage. This process will result the fiber to have a quality improvement from low quality to good quality, so that it can be processed to a more advanced production of textile material to be made as raw material of innovative and high-selling-valued textile product. Keywords: kenaf fiber, pectinase enzyme, fiber preparation, exploration, textiles
      Issue No: Vol. 6
       
  • Synthesis and Photocatalytic Activity of Single Crystal Titanate: Part-1

    • Authors: Amr Nada, Yasser Moustafa, Amal Hamdy, Saad Abd El-Wahab, Dena Yahea
      Abstract: Single crystal TiO2 nanotubes (TNTs) were prepared using modified hydrothermal method by treatment of prepared TiO2 with NaOH aqueous solution and characterized by the X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), thermogravimetric (TG) analysis, BET surface area analysis, Raman spectroscopy, FTIR and UV–vis/DR spectroscopy. Detailed study for the effect of calcinations temperature on the morphology, textural properties, adsorption amount and photocatalytic activity of TiO2 nanotubes was performed. The results showed that the calcinations temperature remarkably altered the phase composition. HRTEM showed that the high-purity nanotubes can be produced through the hydrothermal treatment of TiO2, calcinated at 250 'C.  It was found that the obtained high-purity TNTs have outer diameter of the tubular structures around 15 nm and the length is around 70 nm, the wall of nanotube is 2 layers in one side whereas it is 3 layers in another side and the interlayer spacing is about 1–1.5 nm. The prepared TiO2 nanotubes show enhanced catalytic activity in photocatalytic phenol degradation compared with TiO2 nanoparticles which show lower catalytic activities. Keywords: Titanate, Single Crystal, hydrothermal method
      Issue No: Vol. 6
       
  • Synthesis of New Mono- and Bis- Photochromic Compounds Based on Isatins

    • Authors: N. O. Mahmoodi, N. Kamranzadeh
      Abstract: Among various photochromic compounds, 1,3-diazabicyclo[3.1.0]hex-3-ene derivatives are the subject of intense research due to their photochromic behavior even in the crystalline state, although molecules which show photochromic reactivity in the crystalline state are rare. In this research synthesis of several mono- and bis-1,3-diazabicyclo[3.1.0]hex-3-enes with isatin linkage are enclosed. All synthesized compounds undergo reversible photochromic reactions not only in the solution but also in crystalline state by irradiation with UV light (254 nm). Keywords: Photochromic, Isatin, Bis-1,3-diazabicyclo[3.1.0]hex-3-ene
      Issue No: Vol. 6
       
  • Spectroscopic Techniques and Their Application in Metabolic Profiling of
           Wood: A Minireview

    • Authors: S. S. BISHT, MOHAN KUMAR N., R. EZHUMALAI, RITESH KUMAR
      Abstract: GC/LC-MS and NMR spectroscopy have increasingly occupied a central position in the methodologies developed for metabolic analysis. This brief review deals with introduction of terminology used in metabolic analysis. Gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance spectroscopy (NMR) commonly used in metabolic analysis and metabolic profiling of wood and wood based material by spectroscopic techniques. Apart from the description of the different methods, this review will try to direct the reader to the main approaches for analysis of metabolites in wood science. Keywords: Metabolic profiling, Wood, GC/LC-MS, NMR Spectroscopy.
      Issue No: Vol. 6
       
 
 
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