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  Subjects -> CHEMISTRY (Total: 767 journals)
    - ANALYTICAL CHEMISTRY (45 journals)
    - CHEMISTRY (531 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (25 journals)
    - INORGANIC CHEMISTRY (40 journals)
    - ORGANIC CHEMISTRY (40 journals)
    - PHYSICAL CHEMISTRY (64 journals)

CHEMISTRY (531 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal  
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: 23)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 13)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 7)
ACS Macro Letters     Full-text available via subscription   (Followers: 17)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 24)
ACS Nano     Full-text available via subscription   (Followers: 216)
ACS Photonics     Full-text available via subscription   (Followers: 2)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 8)
Acta Chemica Iasi     Open Access  
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: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 2)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 4)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 8)
Advanced Functional Materials     Hybrid Journal   (Followers: 32)
Advances in Chemical Engineering and Science     Open Access   (Followers: 21)
Advances in Chemical Science     Open Access   (Followers: 8)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 13)
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: 11)
Advances in Nanoparticles     Open Access   (Followers: 10)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Polymer Science     Hybrid Journal   (Followers: 38)
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: 1)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access  
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alchemy     Open Access   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 130)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
American Journal of Chemistry     Open Access   (Followers: 17)
American Journal of Plant Physiology     Open Access   (Followers: 9)
American Mineralogist     Full-text available via subscription   (Followers: 2)
Analyst     Full-text available via subscription   (Followers: 34)
Angewandte Chemie     Hybrid Journal   (Followers: 12)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 179)
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: 14)
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  
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 163)
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)
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: 12)
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: 11)
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: 34)
Catalysis for Sustainable Energy     Open Access   (Followers: 1)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 4)
Catalysis Science and Technology     Free   (Followers: 4)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 6)
Cellulose     Hybrid Journal   (Followers: 4)
Central European Journal of Chemistry     Hybrid Journal   (Followers: 5)

        1 2 3 4 5 6 | Last

Chemistry and Materials Research
   [11 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]
  • Silica nano particles synthesized from boiler spent ash: Value addition to
           an industrial waste

    • Authors: Rani Abraham, Sanal S, Jacob Thomas, Jacob George, Desy P. Koruthu, Manivarnan N.K.
      Abstract: Large quantities of biomass ash are generated everyday by the spice industries and are currently disposed off as landfill. However, this could transform into an environmental pollutant unless alternative techniques are developed for its disposal or value addition. Here in this study, the waste ash from biomass combustion wassuccessfully converted into silica nanoparticles with potential for application in several fields. The highly alkaline nature of the ash and presence of unburned carbon warrants a pretreatment which includes digestion and acid treatment. The synthesized silica was characterized in terms of morphology, specific surface area, crystallinity, surface functional groups and size. Alkaline extraction of the pretreated ash followed by acid precipitation yielded an amorphous structure with minimum mineral contaminants, high surface area, and a narrow size distribution (8-10 nm range) characteristic of nano silica. Studies thus indicate that the waste ash and the extraction process could be fine tuned for the large scale production of amorphous silica and could be of use to solve the problem of boiler ash pollution. Keywords: biomass ash, boiler ash, nano silica, value addition to waste, amorphous silica
      Issue No: Vol. 6
       
  • The Antibacterial activity of new ethyl 2-oxo-2H-chromene-3-carboxylate
           complexes against bacteria isolate from wound infection in Baghdad city

    • Authors: Ashraf S. Hassan
      Abstract: The related researches are based on preparation and mixed of some ligand complexes of the transitional metal ions [Cu(II), La (III)] with ethyl coumarin (ethyl 2-oxo-2H-chromene-3-carboxylate) , finally on the studies of antimicrobial (antibacterial) activities of the same. For their synthesis the prepared solutions of metal chlorides are allowed to react with an ethanolic solution of ethyl 2-oxo-2H-chromene-3-carboxylate in different ratio. Disc diffusion methods were employed for antimicrobial assays against four human pathogenic bacteria isolation from wound infection The bacterial properties of the metal complexes reveal that the Lanthanum complex is more effective against almost all antibacterial tested. Furthermore The staphylococcus aureus bacteria was more types of bacteria sensitive to the effect of the complex studied . Key words: Antimicrobial activities, metal complexes, human pathogenic bacteria, wound infection
      Issue No: Vol. 6
       
  • Use of SiO2 - TiO2 Nanocomposite as Photocatalyst for the Removal of
           Trichlorophenol: A Kinetic Study and Numerical Evaluation

    • Authors: Heba Gobara, Radwa El-Salamony, Dalia Mohamed, Marwa Mishrif, Yasser Moustafa, Tahani Gendy
      Abstract: A series of silica-titania nanocomposite materials with different silica–titania ratios was prepared in presence of a novel ethoxylated sulphanilamide of molecular weight 1053 by the sol-gel method. Several characterisation techniques were adopted such as thermal analysis (differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA)), N2-adsorption-desorption, X-ray diffraction (XRD), Fourier transform infrared (FTIR), and transmission electron microscopy (TEM) connected with energy dispersive spectroscopy (EDS). The surface acidity was investigated by pyridine adsorption using FTIR spectroscopy. The photocatalytic activity and the adsorptive ability of the composites were evaluated based on the photodegradation of 2, 4, 6- trichlorophenol (TCP) under UV irradiation with a wavelength of 254 nm. The maximum TCP adsorption onto the composites was measured in darkness. The results showed that there was no adsorption of TCP on pure SiO2. The 10% TiO2-SiO2 catalyst showed the highest rate of TCP removal among the synthesised composites. The removal % reached to 87 % after 90 min irradiation time. This activity was caused by the large surface area and pore volume as well as the formation of a mesoporous structure, as evidenced from the pore size distribution curve. Finally, the numerical evaluation of the photodegradation of TCP was conducted. Keywords: Nanocomposite, Ethoxylated sulphanilamide, Photocatalytic degradation, UV irradiation, 2,4,6-TCP, Numerical evaluation.
      Issue No: Vol. 6
       
  • Mechanical and Morphological Behavior of Waste GFRP Powder Reinforced
           Polybutyrate composites

    • Authors: Kartik R., Pavithra K.
      Abstract: Biocomposites have emerged to become one of the most sought-after materials, these days. Yet, their high cost, limits their applications. On this regard, the blending of low-cost fillers into the biodegradable polymer may be an alternative solution. This present work concentrates on the development of Polybutyrate/waste GFRP powder (Both Raw and Treated) composites. These composites were synthesized by melt mixing using a Haake Rheocord. Later, samples were prepared by Compression Moulding Technique, followed by Punching and Saw-Cutting. The samples were then tested for Mechanical (Tensile, Flexural and Impact Properties) and Morphological behaviour. The results indicate that the blending was highly successful in improving the fore said properties, while reducing the cost effectively. These biocomposites could be applied in packaging, garden products, waste bin liners, etc. Keywords--Polybutyrate, Waste GFRP Powder, Treatment, Mechanical, Morphology.  
      Issue No: Vol. 6
       
  • Thermal Analysis of Grain Refinement and Modification of an A356 Cast
           Alloy.

    • Authors: Verónica Gutiérrez, Gabriela González, Alejandro García
      Abstract: It is well known that grain refining and eutectic Si modification treatments provide benefits to aluminum alloys. The addition of master alloys makes it possible to obtain a fine grain size and a modified eutectic microstructure. The present research evaluates the combined effect of both treatments in an A356 alloy by thermic analysis of the cooling curves and micro- and macrostructural studies of the samples. Reviewing the thermal parameters of the cooling curves indicated that using 0.2%Ti and 0.03% Sr, a good level of eutectic phase modification, as well as a fine grain structure, is reached. The joint effect of both elements is involved in the alteration of the growth kinetics both of the primary phase and the eutectic phase. Keywords: grain refining, eutectic Si modification, A356 alloy, solidification, thermal parameters, thermic analysis, microstructure, macrostructure.
      Issue No: Vol. 6
       
  • Quantification of the components of the Iraqi Chicken wet egg yolk, and
           characterization of Lecithin.

    • Authors: Mohammed H. Latif, Mohammed A.K. Alsouz, Muna B. Taher
      Abstract: The target of this study is to determine the Iraqi wet egg yolk constituents, and to characterize the Lecithin of this wet egg yolk. The protein of Egg yolk was extracted using and was to be (55.27 %) while water content represent (25 %). Oil content was (13.23 %) isolated from the remaining egg yolk using acetone according to AOCS Official Method Ja 4-46 [1]. Finally Lecithin content was (22.4 %). Pure Lecithin was characterized by FT-IR, U.V-Vis. Analysis, and Powder X-ray diffraction. Keywords: Wet Egg Yolk, characterization, Lecithin, Quantification, Iraqi Chicken.
      Issue No: Vol. 6
       
  • Determination of Anti-schistosomal Finger Profiles of Chenopodium
           ambrosoide Crude Extracts in BALB/c Mice Using Thin Layer Chromatography
           (TLC)

    • Authors: Joseph M. Moilo, Joseph M. Keriko, Dorcas S. Yole, Gerald M. Mkoji
      Abstract: Plants may contain ingredients that have anti-parasitic activity against parasites of medical siginificance. Chenopodium ambrosoides (Wormseed) a wide spread herb in the Family: Chenopodiacea was investigated for anti-schistosomal activity using, the human trematode parasite, Schistosoma mansoni, as the target. The plant is well known for its vermifuge and anti-helminthetic properties. The root, stem, leaves and fruit of the plant were extracted sequentially using n-hexane, dichloromethane, methanol and distilled water as solvents and tested for anti-schistosomal activity. TLC finger profiles mobile of C. ambrosoides extracts showed aqueous (leaf) extract had  more Rf spots than methanol (fruit) extract but they were not significantly different (P > 0.05). The results of this study suggest that Chenopodium ambrosoides aqueous (leaf) and methanol (fruit) extracts has remarkable anti-schistosomal properties, and should be investigated to determine their toxicity and also tested against other parasites as a source novel anti-parasitic compounds. Keywords: Rf - Mobility Relative to front TLC - Thin Layer Chromatography
      Issue No: Vol. 6
       
  • Natural Zeolite Modification With A Surfactant Cetyl Trimethyl Ammonium
           Bromide (Ctab) As Material To Filler In Polypropylene

    • Authors: Erna Frida, Nurdin Bukit, Bunga Fisikanta Bukit
      Abstract: Research purposes to determine the characteristics of the modification of natural zeolite (synthesis CTAB) and particle size, microstructure, as well as determine the effect of modification of natural zeolite as filler on the properties of thermoplastic polypropylene thermal and mechanical properties. Composite manufacture begins with a filler material synthesis of natural zeolite with CTAB. Results of modified zeolite is used as filler in polypropylene matrix mixed in an internal mixer with a temperature of 180 0C for 9 minutes at a mixing rate of 50 rpm. Results of the internal mixer is done printing the sample with hot and cold press and the result is a sample of the resulting sheet characterized the mechanical and thermal properties. Results obtained before the modification of natural zeolite particle size 74 µm, after modification with CTAB particle size to 1 µm. Morphology seen the cavities according to the characteristics of natural zeolite. By increasing CTAB zeolite composition on the polypropylene matrix resulted in decreased tensile strength and elongation at break, but Young's modulus increases. From the thermal analysis that the composite lost more than 3 % of its mass under heating to 447.17°C which is considered enough to deduce that it can absorb significant amounts of water. An increase in the decomposition temperature after the addition of modified zeolite with CTAB. Keywords: Zeolite, CTAB, PP, Analysis, mechanical, thermal
      Issue No: Vol. 6
       
  • Continuous Washing Parameters and Their Effects on Pre-Treatment Results

    • Authors: Muhammad Moosa Abdul Rehman, Muhammad Awais Imran
      Abstract: This paper presents some practical hints of an efficient washing in a continuous process for pre-treated fabrics. The work was performed in a well known Textile mill in Karachi, Pakistan. The study was done to determine effect of some important parameters to save on water and energy (steam and electricity) consumption. Important variable washing parameters such as temperature, water flow rate and speed (which are based on hydrodynamics & mass transfer principles) of the continuous washing range have been discussed & and their effects on TEGEWA, absorbency, pH & whiteness results have been reported with reference of standardize testing methods. Especially, this paper includes; the washing theory & principles & effective & efficient washing factors; which are explained in the simplest way with industrial standard calculations & experiments. Key Words: TEGEWA, Diffusion Washing, Water Flow rate, Absorbency, Cold Pad Batch, Turbulence (Mechanical Agitation).
      Issue No: Vol. 6
       
  • Post-fabrication annealing effects on the performance of polymer:
           Fullerene solar cells with ZnO nanoparticles

    • Authors: Mohammed K. Hamad, Hussein F. Al-luaiby, Waleed A. Hussain, Assel K. Hassan
      Abstract: In this study, poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methylester (P3HT:PCBM) organic photovoltaic (OPV) devices, with ZnO nanoparticles buffer layer between the photoactive layer (P3HT:PCBM) and the cathode (Al top electrode), were fabricated. The active layer were annealed at 140 oC before depositing the Zno and top electrode. The objective of this study was to investigate the effects of the ZnO buffer layer and pre-/post-fabrication annealing on the general performance of these devices. The short-circuit current density(JSC) and open-circuit voltage (VOC) of the OPV devices were improved by the insertion of the ZnO layer and post-fabrication annealing. This can be attributed to, among other things, improved charge transport across the interface between the photoactive layer and the Al top electrode as a result of post-annealing induced modification of the interface morphology. Keywords: Organic, Photovoltaic, Heterojunction, Carriers.
      Issue No: Vol. 6
       
  • Cu(II) and Ni(II) Complexes of Sulfamethazine Mixed with Pyrimethamine:
           Synthesis, Characterization and Antimicrobial Study

    • Authors: Enemose; Edith, A., Akporhonor, E.E., Osakwe, S.A
      Abstract: Two novel mixed ligand metal –drug complexes of sulfamethazine and pyrimethamine were prepared using CuCl2.2H2O and NiCl2.6H2O.The complexes were characterized by elemental analysis, melting point determination, molar conductivity, FT-IR and Uv-Visible spectroscopy. Based on the analytical and spectra data the complexes were formulated as [M(SUFPRM)Cl2.XH2O,(SUFPRM)=Sulfamethazine+Pyrimethamine, M=Cu, Ni. And the complexes formed possessed octahedral geometry. In the complexes, sulfamethazine and pyrimethamine acted as bidentate ligand coordinating through the sulfonamide N-atom and the pyrimidinicN-atom. The complexes have been tested in vitro against a number of pathogenic bacteria[g+][Eschericha coli, Proteus specie, Klebsiella pneumonia, Salmonella typhi and Bacillus]by using paper disc method. Obtained results indicated that the metal complexes exhibited better antimicrobial activities as compared to the ligand. Keywords: Sulfamethazine, Pyrimethamine, metal-drug complexes, ligands, antimicrobial properties.
      Issue No: Vol. 6
       
  • A Study of the Corrosion Behavior of Magnesium and its Alloys in
           Aggressive Environment

    • Authors: Amel Boukhouiete, Zoubida HABES
      Abstract: Magnesium presents indeed a low corrosion resistance [1, 2, 3, 4]. Moreover the behavior of this metal and its alloys is still poorly known in many corrosive environments which limit its applications. Magnesium is particularly sensitive to galvanic corrosion. The presence of impurities (Fe, Ni, Cu, Cr ...) in its matrix with potential higher than that of Magnesium promotes the reduction reactions, especially that of hydrogen and thus generates the galvanic corrosion of magnesium [1, 5]. From its purity depends its resistance to corrosion. The use of alloying elements can improve the corrosion resistance of magnesium (and also the mechanical properties). A beneficial effect of aluminum and manganese on the corrosion resistance of magnesium has been demonstrated [4]. The objective of this work was to evaluate the corrosion of Mg and its alloys by electrochemical method (potentiodynamic) in an aqueous solution of 0.5 M Na2SO4. Keywords: Corrosion, magnesium, protection, passivation, alloying elements.
      Issue No: Vol. 6
       
  • Synthesis and Characterization of Cobalt Homotrinuclear Biologically
           Active Compound

    • Authors: Abdullahi Mustapha, Suleiman Musa Gani
      Abstract: N4O3 tripodal Schiff-base ligand namely tris(5-Bromo-2-hydroxybenzylaminoethyl)amine (Tren5BrSal) have been prepared and characterized by various spectroscopic methods . It is derived from the condensation reactions of tris(2-aminoethyl)amine (Tren), with 3 equivalents of 5-bromo-2-hydroxybenzaldehyde (5BrSal). The Cobalt(III) complex of the resulting ligand was obtained from the reaction of Tren5BrSal with the salt of  cobalt in absolute methanol. The antimicrobial screening was carried out against two bacterial species (Escherichia coli and Streptococc. Sp) and two fungal species (Aspergillus niger and Fusarium sp.). The complex is found to exhibit high antibacterial and anti fungal activity. Keywords: Schiff- base, tris-(2-aminoethyl)amine, Tren5Brsal, Cobalt.
      Issue No: Vol. 6
       
 
 
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