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  Subjects -> CHEMISTRY (Total: 766 journals)
    - ANALYTICAL CHEMISTRY (45 journals)
    - CHEMISTRY (531 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (24 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: 238)
ACS Photonics     Full-text available via subscription   (Followers: 2)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 7)
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: 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: 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: 27)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 142)
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: 189)
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  
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 174)
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: 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: 36)
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
   [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]
  • In vitro determination of Sun Protection Factor on Clays Used for Cosmetic
           Purposes in Kenya

    • Authors: Wesley K. Ng’etich, Elizabeth M. Mwangi, Jackson Kiptoo, Chadwick A. Digo, Japheth O. Ombito
      Abstract: Ultraviolet radiation is a real problem to human health and it’s said to cause skin cancer and related skin ailments. These diseases are of economic burden in terms of diagnosis, treatment and prevention in low and middle level countries. Commercial sunscreens are considered as the most effective way of preventing the incidences of skin cancer, however they are costly, unavailable and they contain toxic ingredients, which can in the end be cancerous. Sunscreens from natural sources like plants and clay are currently being explored as cheap, reliable, and available and may offer simple alternative health benefits. The purpose of this study was to evaluate the amount of sun protection factor (SPF) offered by cosmetic clays used in Kenya by different communities. The SPF was determined in vitro using 3 M transpore adhesive tapes on twelve clay samples collected randomly from sites used in three counties namely Narok, Bomet and Bungoma. Using a spreading protocol of 2 µg/cm2 transmittances between 280 to 400 nm were measured using a UV 1800 Shimadzu, Japan spectrophotometer. A commercial sunscreen with known SPF was incorporated in the study as a positive control. The SPF values of the clays were found to be between 1.46 and 40.98. The SPF value obtained for the commercial sunscreen differed from the SPF cited by the manufacturer. A second method was used on the commercial sunscreen and values obtained were in close agreement with those used in the first method. This study revealed that clays used for cosmetic purposes offer some form of sun protection to its users. Determination of SPF using Transpore tape is cheap, easy to handle, readily available and rapid. Keywords: Sun Protection factor, Clays
      Issue No: Vol. 6
       
  • Preparation and Characterization of Rice Husk Ash as Filler Material in to
           Nanoparticles on Hdpe Thermoplastic Composites

    • Authors: Eva Marlina Ginting, Basuki Wirjosentono, Nurdin Bukit, Harry Agusnar
      Abstract: The purpose of this research is to create nano particles rice rusk ash used as a filler in thermoplastic high density poliethylen (HDPE) and nano-mechanical properties of the resulting composites. The method of rice husk ash made ??way smoothed by ball mill PM 200 for 1 hour, the filter results in a ball mill with a sieve size of 200 mesh (74 µm), rice husk ash is dissolved in 2.5M NaOH for 4 hours and then stirred with a magnetic stirrer, then at Ball mill for 15 hours at a rate of 450 rpm, nano rice husk ash is used as filler in HDPE thermoplastic composition (2,4,6,8,10) wt% were blends in an internal mixer at a temperature of 150 0C laboplastomil at a rate of 60 rpm for 10 minutes. Nano composite mechanical properties were analyzed with Universal Testing Mechanic. The results obtained rice husk ash silica composition of 89.6 wt%, the particle size of 50.6 nm, the results of the mechanical properties of tensile strength and elongation at break of an increase in the composition of the mixture 2 to 4% by weight. Keywords : Nano Particle Rice Husk Ash , XRF, XRD, SEM, Mechanic, Analysis  
      Issue No: Vol. 6
       
  • Silver (I) complexes of methylene bridged quinoline functionalised
           Heterocyclic Carbene Ligands

    • Authors: Aminu Ahmed, Abdullahi Mustapha
      Abstract: This paper describes the synthesis of Silver (I) complexes of methylene bridged quinoline functionalized Heterocyclic Carbene Ligands, by stirring imidazolium salts with silver oxide to obtain the complexes in good yield. The complexes were structurally characterized by 1H NMR, 13 NMR, microanalysis and X-ray crystallography. The geometry of the complexes as revealed by the crystal structure showed that the complexes have linear structures. All reactions involving silver were conducted under the exclusion of light. Keywords: NHC, Imidazolium salt, ligand, silver
      Issue No: Vol. 6
       
  • Heavy Metal Characteristics of Soils at the Municipal Solid Wastes
           Dumpsite at Uyo Metropolis, Akwa Ibom State, South-South, Nigeria

    • Authors: Monechot; Walters. O., Eno-obong Sunday Nicholas, Onyekachi Chidinma I.
      Abstract: These findings documented the heavy metal contents of soil at dumpsite and soils at 10, 20 and 800m outside the dumpsite, during the wet and dry seasons in the vicinity of the municipal solid wastes dumpsite at Uyo metropolis, Akwa Ibom State, South - South (SS) Nigeria. The soil samples were analyzed for heavy metals Fe, Mn, Cr, Ni, Cd, Pb and Zn. The heavy metal contents recorded for the dumpsite soil and for soils at 10, 20 and 800m outside the dumpsite in both seasons agreed with the World Health Standard (WHO). The heavy metal contents recorded for the dumpsite soil in both seasons; Pb (9.90 and 8.70 )mg/kg, Zn (137 and 146 ) mg/kg, Ni (12.56 and 11.82 ) mg/kg, Cr (3.60 and 4.05)mg/kg, Cd (9.05 and 12.2) mg/kg, and Mn (94.0 and 91.2  ) mg/kg  were significantly (P<0.05) higher than the control values; Pb (3.78 mg/kg), Zn (50.90 mg/kg), Ni (2.19 mg/kg), Cr (1.06mg/kg), Mn (44.27mg/kg) and Cd (1.09 mg/kg).  Also, soils sampled from 10 and 20m east of the dumpsite  in both seasons showed a significant (P<0.05) increase in Pb, Zn, Ni, Cr, Cd and Mn contents compared with the control.  These mean values agreed with the mean concentrations measured for the dumpsite soil samples in both seasons. However, soils from 10 and 20m west, south and north of the dumpsite recorded heavy metal contents which agreed with the control results in both seasons. These findings revealed that the dumpsite has a potential effect on the ambient soil characteristics. Particularly soil located east lowland of the dumpsite. Therefore, the government of Akwa Ibom State should set up standard solid wastes recycling and reusing plants within the state to convert the different metal containing wastes generated within the metropolis into useful products. This will minimize heavy metal contamination in the soil in future. KEY WORDS: Solid wastes, dumpsite area, heavy metals, soil, Uyo, Nigeria.
      Issue No: Vol. 6
       
  • Removal of Methyl Orange from Aqueous Solutions Using Thermally Treated
           Egg Shell (Locally Available and Low Cost Biosorbent)

    • Authors: Kassa Belay, Akeza Hayelom
      Abstract: The effluent water of any industries such as textile, leather, paper, printing, cosmetic, etc. contains large amount of hazardous dyes. There is a huge number of treatment process as well as adsorbent which are available in low cost adsorbents for the removal of hazardous dyes from aqueous waste by adsorption treatment. In this study, thermally treated egg shell was used as an adsorbent for the removal of methyl orange from an aqueous solution. All operating parameters like; adsorbent dose, contact time, particle size and initial concentration of methyl orange were effective on their removal efficiency of the dye. Key words: Adsorption, egg shell, methyl orange and Uv-vis spectroscopy
      Issue No: Vol. 6
       
  • Kinetics and Thermodynamics of Heavy Metal Ion Exchange by Synthesized
           Cation Resin obtained from Red Onion Skin

    • Authors: Obi Chidi, Onwucha Nnawuike Peter
      Abstract: Red onion skin extract polymerized with toluene di- isocynate and functionalized with sulphunic acid has been investigated for the exchange of heavy metal ions from aqueous solution. Column technique was adopted in the ion exchange process. The result showed that the selectivity of the resin for the exchange of the metal ions was found to be 97.6 7 % (Cu II), 89.8 % (Cd II) and 79.6 % (Pb II) respectively.      Kinetic studies revealed the cation exchange rate constants to be 3.16  mgL-1min-1 (Cu II), 2.68  mgL-1min-1 (Cd II) and 1.76  mgL-1min-1 (Pb II). The result further showed that the cation exchange capacity of the resin for the three divalent metals was  0.09 mgg-1. Thermodynamic evaluations revealed that the ion exchange process was endothermic having standard enthalpy ( Ho), Gibbs free energy ( Go) and entropy changes (( So) as 47.806 kJmol-1, 2.062 kJmol-1, 3.267 kJmol-1K-1 (Cu II), 30.796 kJmol-1, 1.234 kJmol-1, 2.112 kJmol-1K-1 (Cd II) and 16.197 kJmol-1, 0.407 kJmol-1, 1.128 kJmol-1K-1 (Pb II) respectively. The synthesized red onion skin has demonstrated to be effective for the exchange of heavy metal ions from aqueous solution. Keywords: Ion exchange, synthesis, red onion skin extract, heavy metal ion, kinetics, thermodynamics
      Issue No: Vol. 6
       
  • Studies on Some Physical Properties of Dikanut Seeds

    • Authors: Oladimeji Olusegun, Idowu-Adebayo Folake, Awonorin Sam O, Sanni Lateef O
      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
       
  • Phytochemical Constituents and Physicochemical Properties of Medicinal
           Plant (Moringa Oleifera) Around Bule Hora

    • Authors: Kassa Belay, Mesay Sisay
      Abstract: The investigation was carried out a qualitative test for the possible phytochemical components (Alkaloids, Phenolic compound, Quinone, Protein, Anthraquinones, Saponins, Coumarin, Flavonoids, Tannin Fixed oil and fats and Steroid-glycosides) and quantitative analysis for some selected physicochemical properties after extracting the sample using soxhlet extraction by using ethanol and methanol as extractants. And Phenolic compound, Tannins, flavonoid and Steroid-glycosides are intensively found in the plant but Anthraquinones, protein and fixed oil and fat were not found even in a minimum amount. The medicinal use of Moring is results from the presence of some active phytochemical constituents. Lastly the physic-chemical properties value is investigated as follow: Moisture content 0.032% Total ash value 96 % Saponification value 37.4, Refractive index for Ethanol and    methanol extract are 17,7 ,Acid value 3.94 and the extract is  Insoluble in chloroform but highly soluble in  Ethanol, Diethyl ether and  Water. Key Words: Moringa oleifera, physicochemical properties, phytochemical sceerining and soxhlet extraction
      Issue No: Vol. 6
       
  • Assessment of Some Cardiac Biomarkers in Adult HIV Seropositives in Nnewi,
           Nigeria.

    • Authors: Ifeoma Priscilla Ezeugwunne, Charles Chinedu Onyenekwe, Joseph Ebere Ahaneku, Gladys Ahaneku, Martins Ifeanyichukwu, Samuel Chukwuemeka Meludu, Rebecca Chinyere Chukwuanukwu, Wuraola Serah Nnaemeka, Okwara John Ekenedirichukwu, Okwudiri Nnadozie, Christian Ejike Onah
      Abstract: Human Immunodeficiency virus (HIV) infection is associated with increased of developing heart disease. Information on cardiac status in HIV infected in Nigerians is lacking. We assessed the impact of HIV infection on serum Myoglobin, Troponin, total CK, CK-MB, LDH and AST of HIV infected adults presenting at Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State. The aim of this study is to determine some cardiac biomarkers in adult HIV seropositive participants, blood samples collected from the 300 randomly recruited participants were used for HIV screening, CD4+ T cell count, serum Myoglobin, Troponin, total CK, CK-MB, LDH and AST. Standard Laboratory methods were used for the analysis. The results showed that the mean serum Myoglobin and Troponin levels were significantly higher in symptomatic HIV participants not on antiretroviral therapy (ART) compared with asymptomatic HIV participants at P< 0.05, in each case. Also, the mean serum Myoglobin and Troponin levels were significantly higher in symptomatic HIV participants not on ART compared with HIV asymptomatic HIV participants at P<0.05 in each case. Again, the mean serum total Creatine kinase, CK-MB, LDH and AST were significantly higher in symptomatic HIV participants not on ART compared with asymptomatic HIV participants at P<0.05 respectively. Similarly, the mean serum total Creatine kinase, CK-MB, LDH and AST were significantly higher in symptomatic HIV participants not on ART compared with HIV seronegative control subjects at P<0.05 in each case. Once again, the mean serum total Creatine kinase, CK-MB and AST were significantly higher in asymptomatic HIV participants compared with HIV seronegative control subjects at P<0.05 respectively. Increased levels of some cardiac markers were seen in HIV infected participants. Keywords: HIV, cardiac markers, participants.
      Issue No: Vol. 6
       
 
 
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