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CHEMISTRY (532 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 1)
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: 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: 250)
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: 10)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 4)
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: 17)
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: 12)
Advances in Nanoparticles     Open Access   (Followers: 11)
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: 2)
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)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 150)
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: 35)
Angewandte Chemie     Hybrid Journal   (Followers: 15)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 201)
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: 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   (Followers: 1)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 187)
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: 13)
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: 12)
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: 37)
Catalysis for Sustainable Energy     Open Access   (Followers: 2)
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)
Cereal Chemistry     Full-text available via subscription   (Followers: 3)

        1 2 3 4 5 6 | Last

Chemistry and Materials Research
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  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]
  • An Examination of Selected Wood Properties of Some Economic Tropical
           Timber Species.

    • Authors: Emmanuel Tete Okoh, Ebenezer Quayson, Isaac Agyei-Boakye
      Abstract: Characterizing wood is necessary in order to make information available to interested users of a particular timber species. In this study we characterized Aningeria robusta (A.Chev.) Aubrev.& Pelleger,( Asanfena), Terminalia ivorensis A.Chev., (Emeri), Terminalia superba Engl. & Diel., (Ofram), Khaya ivorensis A.Chev., (Mahogany) and Entandrophragma cylindricum Sprague., (Sapele) according to their anatomical and physical properties. This work discussed the macroscopic physical properties in terms of densities (air/oven dry), colour and surface roughness of the five wood species. Cell properties studied included vessel, fibre and parenchyma cell dimensions as well as their pore arrangements. It was clear that, the proportion of fibres per mm2 of the species, as well as their corresponding cell wall thicknesses values seems to bear some relationship with their densities Keywords: maceration; optical microscopy; roughness; wood anatomy; wood density
      Issue No: Vol. 6
  • Effect ofthe Distance between Points Load on the Behavior of Strengthened
           Reinforced Concrete Beams

    • Authors: AamerNajim Abbas, NuraJasim Muhammed, shaimaa Tariq Sakin
      Abstract: The general behavior of the reinforced concrete beams depends on many variables, including what is the quality of the concrete and strength and including those on reinforcement type and quantity of reinforcement in the beam. But there is an important variable which nature of loads application on the beam and type of load is it point or distributed. Sometimes the distance between points load is variable such as vehicle wheel load because each vehicle as different distance between wheels. In this research, the effect of changing the distance between the points load were studied and compared with model carrying a single point load at mid span, as well as studying the effect of the use of carbon fiber with a length equal to the distance between the points load. Theoretical results consists of eight models were compared in this study with the results of the previous experimental results. The study contains a discussion of the general behavior of the beam in addition to the study of the failure carrying load, cracking load, ductility and the relationship between the stages of load application and the deflection of concrete beams with and without carbon fiber sheets. Key words: Ansys, strengthening, ductility, carbon fiber.
      Issue No: Vol. 6
  • Studies on Some Physical Properties of Dikanut Seeds

    • Authors: Oladimeji Olusegun, Idowu-Adebayo Folake, Oladokun S. Olanrewaju
      Abstract: The physical properties of dikanut seeds sold in Nigerian markets were determined.   The dried seeds were evaluated for the principal dimensions, weight, volume, true density, bulk density, and porosity, angle of repose, static coefficient of friction and specific heat capacity.   The average three principal dimensions were 2.375, 1.592 and 0.778cm.  The seeds had an average weight of 1.904g, volume of 2.38cm3, density of 0.832g/cm3, bulk density of 0.475g/cm3, porosity of 43%, and surface area of 3.468cm2.   Angle of repose and coefficient of friction varied quadratically with moisture content.   The specific heat capacity of dikanuts was measured at four moisture contents and eight temperatures.   The specific heat of dikanut varied from 1.9333J/g?C to 6.075J/g?C for moisture contents between 3% and 30% and those that were used to model multiple simple regression equations expressing specific heat as a function of moisture content. Key words: Dikanut, seed, dimension, specific heat capacity
      Issue No: Vol. 6
  • Greywater Disinfection by SolarReactor in Baghdad

    • Authors: Seroor Atallah Khaleefa Ali
      Abstract: Solar disinfection is an efficient method for greywater treatment where it is exposed to solar radiation to inactivate pathogenic organisms.Solar disinfection is affected by numerous variables which  include the wavelengths of solar radiation, water temperature, turbidity, and reactor selection. A Laborotary model of solar reacter has been designed and constructed at Environmental Hydraulic in Mustansiriya University/College of Engineering. The model consists of four independent Acrylic reactors of 100mm diameter and 1300mm length, filled with different materials for filtration and disinfection including (sand, Black granite, Granular activated carbón, and Mixture of granular activated carbonated black granite). Thesolardisinfectiontreatmentwas experimented bya8 L multistage contiuous flow with recycling ratio 4 .The treatmentprocesses  still incomplete wherethe tertiarytreatmentisnotapplied in many treatment plants in Iraq.Thissituationcouldcompromisetheplannedwastewater reuseregardingespecially themicrobialquality. KeyWord: Solar Energy, Disinfection, Greywater, Multi Stage reactor
      Issue No: Vol. 6
  • Some Biochemical and Hematological Parameters among Petroleum and Cement
           Factory workers in Sulaimaniyah City/ Kurdistan/ Iraq

    • Authors: Dler. M. Salh, Sirwan M. Mohammed, Loqman O. H. Salih
      Abstract: The objective of the current research was to study any alteration in the biochemical and hematological parameters among exposed workers in Petroleum and Cement Factories located in the Bazian basin northwest Sulaimaniyahcity,Iraq .we found  a significant increase  in the average BLL and serum iron values among cement and petroleum refining workers(11.3 µg/dL)and(173 µg/dL)  successively .As well among the studied groups the workers at Mass CF had the highest BLL (15.5 µg/dL) and serum iron(216 µg/dL). An increase in the average values of serum creatinine and AST levels and a significant decline in mean values of ALP among the workers, while, no significant difference were found between other studied biochemical parameters .The hematological analysis revealed a significant increases in the values of RBC, HCT and MPV, in addition to, a decrease in MCHC. Oppositely, no significant differences were found between other blood cell parameters. Keywords: Petroleum and Cement Factories toxic dusts and fumes. Blood lead, Iron biochemical and hematological parameters
      Issue No: Vol. 6
  • Relative Examination of Monosaccharide and Disaccharide Adopting
           Polarimeter and UV-Visible Spectrophotometer Instruments.

    • Authors: Sylvia Okonkwo, L.C. Anyika
      Abstract: Polarimeter and ultra violet-visible spectrophotometer instruments were used to analyze monosaccharide and disaccharide. Linear regression equation and analysis of variance (ANOVA) were applied for statistical analysis. Uv-visible spectrophotometer was more sensitive than polarimeter (R2 = 0.94).  Significant difference (P<0.05) was observed between the two methods. Identification of higher percentage of specific monosaccharides was possible. This was shown by the significant difference among sugars for the methods. Uv-visible spectrophotometer and polarimetry showed least sensitivity for determination of fructose. In recent times, ethanol from bio resource is being considered as an alternative source of energy, glucose which is one of the monosaccharide of carbohydrate can be converted to ethanol, and the quantity of the ethanol produced is dependent on the initial concentration of (carbohydrate) that was fermented. Other industrial use of carbohydrates includes pharmaceutical uses, paints ink etc. It is therefore important to compare instruments which will be adopted for rapid, sensitive and accurate results on the quantity and quality of carbohydrates. Keywords: Monosaccharide, disaccharide, Uv-spectrophotometer and Polarimeter.
      Issue No: Vol. 6
  • Using Ultrasonic Wave to Study Modulus of Elasticity, Shear Modulus and
           Poissons's Ratio of Polymer Concrete.

    • Authors: Meethaq M. Abed
      Abstract: The main aim of this study is assess the modulus of elasticity , shear modulus and Poissons's ratio of polymer concrete (PC).Polymer concrete is a composite material realized with resin and aggregates.The Unsaturated polyester composite  resin was used for binding the aggregates. The silica foam and  glass fibers were introduced in the composition as filler.Some mechanical properties of polymer concrete have been investigated, by non-destructive method. The experimental results of ultrasonic wave at 26 KHz test were correlated with, modulus of elasticity, shear modulus and Poissons's ratio. The fiber percentage and silica foam was constant, the unsaturated polyester resin and the Silica sand dosages were varied.The results showed that by increase the percentage of sand aggregate (%W) in all groups the Poissons's ratio,Pulse Velocity,Modulus of Elasticity and Shear Modulus are increased. Keywords: Shear Modulus, Polymer Concrete, Modulus of Elasticity, Poissons's ratio,Ultrasonic wave.
      Issue No: Vol. 6
  • Utilizations of Palm Oil Mills Wastes as Source of Energy and Water in the
           Production Process of Crude Palm Oil

    • Authors: Ridzky Kramanandita, Tajuddin Bantacut, Muhammad Romli, Mustofa Makmoen
      Abstract: Palm oil mills in their production process require a large amount of energy and water. Scarcity and enormous costs of energy and water become factors that may limit the future production of crude palm oil (CPO). On the other hand, demands for palm oil and its derivatives are increasing. Therefore, a number of research on energy and water by utilizing biomass produced by fresh fruit bunches (FFB) are necessary to develop. Analysis on the energy and mass balance of palm oil mills was carried out ??to obtain accurate information on the needs and the potential of energy and water from the wastes generated. Analysis on the energy and mass balance of palm oil mills was carried out ??to obtain accurate information on the needs and the potential of energy and water from the wastes generated. The results of the analysis of the energy and mass balance show that the potential of the total solid wastes generated by the palm oil mills with a capacity of 30 tons/hr are equal to 16,090.09 kg/hr or equivalent to 53.63% of the fresh fruit bunches with the composition of empty fruit bunches (26.97%), fibers (17.67%) and shells (6.46%), while the liquid wastes generated are equal to 18,113.15 Kg/hr (%) with the composition of mud (18.38%) and water (42.05%). The palm oil mills required To supply energy for palm oil mills, the solid wastes can be converted into biohydrogen, biogas and bioethanol, while the liquid wastes can be converted into biogas and biohydrogen as well as water sources. Keywords: oil palm, energy, water, equilibrium
      Issue No: Vol. 6
  • Synthesis & Study of Anesthesia Organic Compounds

    • Authors: Nagham . Mahmood. Aljamali
      Abstract: In the  present work , mono & bicyclic compounds [1-8] were synthesized as  derivatives of analagisic by alkalytion of 2-aminothiozoline with carbonyl compounds (succinic acid ., chloro aceticacid .,2,5-hexan-dione ., 3-chloro propoyl chloride ), where as the compounds [9-12] were synthesized by condensation between diketone compounds with (2-amino benzothiazole ,guanine) . The synthesized compounds structures were characarterized by several methods :{(C.H.N)-analysis , FT.IR-spectra , 1H.NMR-spectra } & melting points . Keyword: Anesthesia , pharmaceiutical compounds ., diketone Introduction : Asystematic investigation of this class of compounds lead revealed  that thiazol containing pharmacoactive agents play important role in medicinal chemistry and has a long history of application in agrochemicals and pharmaceiuticals industry as a analgesic and anti-inflammatory drugs are prescribed simultaneously in normal practice. The target compounds constitute an essential pharmacophore in many naturally occurring and biologically active agents.Thiazoles fused with different compounds that are known to contribut as antitumor and antimicrobial(1,2). The mono & bicyclic compounds are class of compounds well known for along time as anesthetic drugsin surgery such as diazepine compounds(3-5)which were first introduced for the treatment of anxiety (4-6) . In this study , the synthesized compounds (thiazolo diazepine , benzoimidazol, thiazolo pyrimidone ,benzothiazolo pyrimidine , guano pyrimidine ) are cyclic compounds in which one or more of nitrogen atoms which contain five , six & seven membered unsaturated rings of mono or bicyclic compounds (3,5) . In this work , the cyclic nitrogen compounds were synthesized by cyclocondensation of amino compounds with carbonyl compounds led to formation of mono & bicyclic compounds   [1-12] , which used as analgesic , relaxative , hypnotic(7,8)& other uses(9-20) .
      Issue No: Vol. 6
  • Quantum Mechanical Study the Kinetics, Mechanisms and Thermodynamics of
           the Gas-Phase Pyrolysis of Isopropyl Bromide

      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,Characterization,Thermal and Kinetic Photo Chemical
           Decomposition Study of New Azo Dye 7-[2-(BenzImidazolyl)Azo]-8-Hydroxy
           Quinoline and its Znic (II) Complex

    • Authors: Hassan. A. Habeeb, Khalid .J. Al-Adilee, Suadad .A. Jaber
      Abstract: This research includes preparation and spectral identification of a new azo ligand7-[2-(Benzimidazolyl) azo]-8-Hydroxy quinoline (BIAHQ) by using UV-Vis,  IR, 1H-NMR and mass spectra.The preparation of Zn(II)-complex of this ligand and identification by UV-Vis, IR radation spectrum,which characterized by elemental analysis.The analytical data shows that the metal to ligand ratio [M:L] of Zn(II)complex is 1:2.Decomposition kinetics was studied photochemical complex through irradiation solution complex single wavelength light ?=365 nm ,at temperature of 25 ?C for 60 minutes  and ethanol solvent was found to be the reaction from first order. Also,the calculated rate concetant photolysis kd mediated follow spectral changes during the process of irradiation . In order to reach the optimal conditions for the dissolution of the complex, it has been studied the impact of several factors on photochemical reaction of disintegration of the complex which include : Study the effects of the change in the intensity of light. More over  disintegration of the complex has been studied in temperature range 15-30?C, and studied the effects of the acidic function within range 3-9.The effects of several alcoholic solvents were studied on the rate of disintegration and these solvents are methanol, ethanol, isopropanol and1-butanol.Free ligand and Zn(II)complex were submitted to thermal analysis(TGA and DSC) activation thermodynamic data are calculated.
      Issue No: Vol. 6
  • Mechanism Bond Formation of Powder Multi Material Sintering: Polyethylene
           – Poly Vynil Chloride

    • Authors: Slamet Riyadi, Wahyu Nugroho, Siswadi .
      Abstract: The demands of the functional aspects and the economic value of manufactured products to encourage the development of multi-material sintering process. But in its realization, various problems emerging techniques, including the determination of the type of material that can be sintered, non-uniform shrinkage phenomenon, and the bonding mechanism between different grains of unknown material. This study was conducted to determine the mechanism of bonding between the grains and calculate the shrinkage that occurs based on the grain due to the implementation of the sintering process. In practice, this study pursued through two stages. The first stage in the form of observations of the two grains with similar material (the material used is polyethylene). While the second phase in the form of observation of grains of polyethylene (PE) with a grain sintered poly vinyl chloride (PVC). Observations were made at isothermal conditions and periodically done shooting so the bonding process can be visualized. Based on the image data that has been retrieved, the volume shrinkage analysis can be done by calculating the projected area of ??the particle. From the research that has been done, the volume shrinkage that occurs on sintering material (PE with PVC) at an isothermal temperature of 1100C is equal to 20.42% Key Word: mechanism bond, sintering, polyethylene, poly vinyl chloride  
      Issue No: Vol. 6
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