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Publisher: Horizon Research Publishing   (Total: 54 journals)   [Sort by number of followers]

Showing 1 - 54 of 54 Journals sorted alphabetically
Advances in Diabetes and Metabolism     Open Access   (Followers: 18)
Advances in Economics and Business     Open Access   (Followers: 11)
Advances in Energy and Power     Open Access   (Followers: 12)
Advances in Pharmacology and Pharmacy     Open Access   (Followers: 7)
Advances in Signal Processing     Open Access   (Followers: 11)
Advances in Zoology and Botany     Open Access  
Bioengineering and Bioscience     Open Access   (Followers: 1)
Cancer and Oncology Research     Open Access   (Followers: 8)
Chemical and Materials Engineering     Open Access   (Followers: 13)
Civil Engineering and Architecture     Open Access   (Followers: 18)
Computational Research     Open Access   (Followers: 1)
Computer Science and Information Technology     Open Access   (Followers: 13)
Energy and Environmental Engineering     Open Access   (Followers: 7)
Environment and Ecology Research     Open Access   (Followers: 7)
Food Science and Technology     Open Access   (Followers: 3, SJR: 0.11, h-index: 6)
Immunology and Infectious Diseases     Open Access   (Followers: 9)
Intl. J. of Biochemistry and Biophysics     Open Access   (Followers: 1)
Intl. J. of Cardiovascular and Cerebrovascular Disease     Open Access   (Followers: 2)
Intl. J. of Neuroscience and Behavioral Science     Open Access   (Followers: 1)
Linguistics and Literature Studies     Open Access   (Followers: 4)
Manufacturing Science and Technology     Open Access   (Followers: 2)
Mathematics and Statistics     Open Access   (Followers: 5)
Nanoscience and Nanoengineering     Open Access   (Followers: 1)
Natural Resources and Conservation     Open Access   (Followers: 6)
Nursing and Health     Open Access   (Followers: 3)
Open J. of Dentistry and Oral Medicine     Open Access  
Sociology and Anthropology     Open Access   (Followers: 5)
Sport and Art     Open Access   (Followers: 1)
Universal J. of Accounting and Finance     Open Access   (Followers: 2)
Universal J. of Agricultural Research     Open Access   (Followers: 1)
Universal J. of Applied Mathematics     Open Access   (Followers: 5)
Universal J. of Applied Science     Open Access   (Followers: 2)
Universal J. of Biomedical Engineering     Open Access  
Universal J. of Chemistry     Open Access  
Universal J. of Clinical Medicine     Open Access  
Universal J. of Communications and Network     Open Access  
Universal J. of Computational Mathematics     Open Access   (Followers: 4)
Universal J. of Control and Automation     Open Access   (Followers: 3)
Universal J. of Educational Research     Open Access  
Universal J. of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Universal J. of Engineering Science     Open Access   (Followers: 1)
Universal J. of Food and Nutrition Science     Open Access   (Followers: 5)
Universal J. of Geoscience     Open Access   (Followers: 3)
Universal J. of Industrial and Business Management     Open Access   (Followers: 1)
Universal J. of Management     Open Access  
Universal J. of Materials Science     Open Access   (Followers: 3)
Universal J. of Mechanical Engineering     Open Access   (Followers: 10)
Universal J. of Medical Science     Open Access  
Universal J. of Microbiology Research     Open Access  
Universal J. of Physics and Application     Open Access   (Followers: 2)
Universal J. of Plant Science     Open Access  
Universal J. of Psychology     Open Access   (Followers: 2)
Universal J. of Public Health     Open Access   (Followers: 2)
World J. of Computer Application and Technology     Open Access   (Followers: 3)
Journal Cover Chemical and Materials Engineering
  [13 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2332-1032 - ISSN (Online) 2332-1067
   Published by Horizon Research Publishing Homepage  [54 journals]
  • Pressure Induced Structural Phase Transition, Metallization and
           Superconductivity in KI

    • Abstract: Publication date:  Sep 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  3  Y. Ramola   C. Nirmala Louis   and A. Amalraj   The self-consistent band structure calculation for potassium iodide (KI) performed both in NaCl and CsCl structures using the full potential linear muffin-tin orbital (FP-LMTO) method is reported. The equilibrium lattice constant, bulk modulus and the phase transition pressure at which the compound undergoes structural phase transition from NaCl to CsCl are predicted from the total energy calculations. The band structure, density of states (DOS), electronic charge distributions, metallization and superconducting transition temperature (Tc) of KI are obtained as a function of pressure for both in NaCl and CsCl structures. The density of states at the Fermi level (N(EF)) gets enhanced under pressure, which leads to metallization in KI. It is found that, the charge transfer from s and p states to d state causes structural phase transition and superconductivity in KI. The pressure corresponding to structural phase transition from NaCl structure (B1) to the CsCl structure (B2) is 0.02 Mbar in KI. This value is agreement with the experimental value of 0.019 Mbar. In KI, the metallization occurs through indirect closing of the band gap between Γ and H points at the reduced volume V/Vo=0.43 (CsCl structure), the corresponding metallization pressure is 1.228Mbar. Our results completely agree with the experimental observation of 1.31 Mbar. The highest Tc estimated is 2.151 K and the corresponding pressure is 4.945 Mbar in the NaCl structure and 0.107 K in the CsCl structure.
      PubDate: Sep 2017
       
  • Investigation of Surface Roughness, Kerf Width and MRR on AISI D2 Steel
           Machined by Wire EDM

    • Abstract: Publication date:  Sep 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  3  M. Shunmuga Priyan   and J.D. Darwin   Engineering industry has made tremendous growth in its manufacturing fields in the last decade but still the modern machines are not utilized up to the desired level. Wire electrical discharge machining (WEDM) is one such sophisticated machining process used in industry, which is a high-speed cutting and high-precision machining to realize productivity and improved accuracy for all manufacturing parts. Optimisation of the operating parameters of WEDM will result in efficiency with regard to higher surface finish and maximum material removal rate. The present investigation of the cutting performance on die steel with different parameters such as pulse on time, pulse off time, servo voltage, wire feed, current and cutting speed were involved to determine by which using wire electric discharge machining(WEDM) process. The shape of the wire and base material dimensions of brass wire 0.25mm diameter and AISI D2 steel with 100× 100 × 10 mm were carried out. The cutting performance outputs considered in this study are material removal rate (MRR), Kerf width and surface roughness (Ra). Experiments were carried out under Taguchi's L16 orthogonal array under different conditions of parameters. An optimal combination of WEDM parameters for proper machining of AISI D2 steel to achieve better surface roughness and Materials Removal Rate (MRR) is achieved in this investigation.
      PubDate: Sep 2017
       
  • High Pressure Band Structure, Density of States, Structural Phase
           Transition and Metallization in CdS

    • Abstract: Publication date:  Jan 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  1  J. Jesse Pius   A. Lekshmi   and C. Nirmala Louis   The electronic band structure, density of states, metallization and structural phase transition of cubic zinc blende type cadmium sulphide (CdS) is investigated using the full potential linear muffin-tin orbital (FP-LMTO) method. The ground state properties and band gap values are compared with the experimental results. The equilibrium lattice constant, bulk modulus and its pressure derivative and the phase transition pressure at which the compounds undergo structural phase transition from ZnS to NaCl are predicted from the total energy calculations. The density of states at the Fermi level (N(EF)) gets enhanced under pressure, which leads to metallization in CdS. The pressure corresponding to structural phase transition from ZnS structure (B3) to the NaCl structure (B1) is 0.0168 Mbar in CdS. The metallization pressure PM is 6.9133 Mbar.
      PubDate: Jan 2017
       
  • Fabrication and Characterization of PCBM: P3HT-based Thin-film Organic
           Solar Cells with Zinc Phthalocyanine and 1,8-Diiodooctane

    • Abstract: Publication date:  Jan 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  1  Haruto Maruhashi   Takeo Oku   Atsushi Suzuki   Tsuyoshi Akiyama   and Yasuhiro Yamasaki   [6,6]-phenyl C61-butyric acid methyl ester (PCBM) and poly(3-hexylthiophene) (P3HT) bulk heterojunction solar cells added with zinc-tetra-tertiary-butyl-phthalocyanine (ZnPc) and 1,8-diiodooctane (DIO) were fabricated and characterized. Incident photon-to-current conversion efficiencies in the range of 400-650 nm were increased by the ZnPc addition, and the absorption range of ZnPc overlapped with the photoluminescence range of P3HT. Photovoltaic properties of the solar cells with an inverted structure were improved by the ZnPc and DIO addition. Microstructures of the thin films were analyzed by X-ray diffraction. The improvement would be due to the Förster energy transfer mechanism the direct charge transfer from ZnPc to PCBM, and the phase separation of PCBM and P3HT by the DIO addition would also contribute the improvement.
      PubDate: Jan 2017
       
  • Effect of Coconut Shell Powder as Filler on the Mechanical Properties of
           Coir-polyester Composites

    • Abstract: Publication date:  Dec 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  4  Md. Tangimul Islam   Subrata Chandra Das   Joykrisna Saha   Debasree Paul   M. Tauhidul Islam   Mahbubur Rahman   and Mubarak Ahmad Khan   Coir mat was used as reinforcement, polyester resin was used as matrix and coconut shell powder (CSP) was used as filler material which was employed as 10, 20, 30, 40, 50, 60 and 100% by weight in the composites. Coir mat/polyester resin composites were made by hand lay-up technique. Mechanical properties such as tensile strength (TS), bending strength (BS), tensile modulus (TM), bending modulus (BM), elongation at break and impact strength (IS) were also investigated. The maximum increase of TS, BS, TM, BM and IS were found to be 44.44, 128.00, 17.96, 112.09 and 62.50% respectively for 30% filler content on the composites. It was revealed that the strength properties of the composites were increased with the increase in filler content up to 30% by weight, however, further increase in filler content the value decreased. Gamma radiation of 100, 250 and 300 krad doses were applied on 30, 40 and 60% filler content composites. Gamma radiation dose of 250 krad showed better result than that of other doses. IS of the composites improved 48.08, 26.67 and 17.50% for 30, 40 and 60% filler content respectively at 250 krad, where 30% filler content composites displayed the highest improvement. Degradation tests of the composites for up to 50 days were performed in a soil medium. It was revealed that BS decreased for all the composites.
      PubDate: Dec 2017
       
  • Synthesis, FTIR Studies and Optical Properties of Aluminium Doped Chromium
           Oxide Nanoparticles by Microwave Irradiation at Different Concentrations

    • Abstract: Publication date:  Apr 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  2  J. T. Anandhi   S. L. Rayer   and T. Chithambarathanu   In this exposure, pure and aluminium (Al)doped chromium (III) oxide (Cr2O3) nanoparticles are synthesized by simple solvothermal microwave irradiation (SMI) technique. SMI technique is simple and low cost; it has the future to be produced on a huge scale. The effect of dopant (Al) concentration on the structural behavior of Cr2O3 nanoparticles was examined by X-ray diffraction. The average crystallite size of the synthesized nanoparticles was measured from XRD patterns using Scherrer equation and was decreased from 14.56 nm 10.86 nm with the increasing Al concentration in Cr2O3 from 0 to 5% (in steps of 0, 1, 2, 3, 5). Morphologies and compositional elements of the synthesized nanoparticles were observed by the field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) spectroscopy, respectively. The optical property of the samples was measured by ultraviolet - visible (UV-Vis.) absorption spectroscopy. The observed optical band gap value ranges from 2.12 eV to 1.90 eV for Al doped nanoparticles and was red shifted in comparison with that of the pure Cr2O3 (3.483 eV).
      PubDate: Apr 2017
       
  • Effects of Metal Phthalocyanines as Hole-transporting Layers of
           Perovskite-based Solar Cells

    • Abstract: Publication date:  Apr 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  2  Atsushi Suzuki   Haruka Ueda   Yuki Okada   Yuya Ohishi   Yasuhiro Yamasaki   and Takeo Oku   Halogen halide perovskite solar cells using active layer of CH3NH3PbI3 with vanadyl phthalocyanine (VOPc), vanadyl naphthalocyanine (VONc) and, tetrakis (tert-butyl)[bis(trihexylsiloxy)germanium phthalocyanine] (GePc) doped 2,2',7,7'-tetrakis-(N,N-di-4-methoxy phenyl amino)-9,9'-spirobifluorene (Spiro-OMeTAD) as hole- transporting layers were fabricated and characterized for optimizing with tuning the photovoltaic performance, optical properties, and microstructure. Introducing of metal phthalocyanine into the hole-transporting layer improved the photovoltaic properties including carrier diffusion with increase of carrier mobility, optical absorption, and the perovskite crystal growth. The metal phthalocyanines had the effect of promoting optically induced carrier generation and improvement of the charge transport with suppression of carrier recombination as electron blocking layers on the photovoltaic mechanism. The energy diagram and photovoltaic mechanism are discussed by the experimental results.
      PubDate: Apr 2017
       
  • Synthesis of Titanium Oxide Particles Reinforced with Magnesium by Argon
           Controlled Stir Casting Process and Characterization

    • Abstract: Publication date:  Apr 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  2  Lakshmanan Pillai A.   and Jinu G. R.   The experimental investigations of magnesium based matrix reinforced with the TiO2 particles with 2.5, 5, 7.5 and 10% weight ratios are presented in this research paper. The purpose of this work is to elaborate the manufacturing processes of pure magnesium metal with the addition of Titanium oxide through the vacuum stir casting route with the use of Argon as shielding gas to prevent the oxidation. The Electrical Discharge Machining (EDM) was used to resize the samples for conducting experiments. The mechanical parameters like density, hardness, tensile strength and ultimate tensile strength were evaluated by immersion test, Rockwell Tester and UTM respectively. The presence of particles in phase is ensured by XRD analysis. The microstructural examinations revealed that homogeneous distribution of reinforcing particles in magnesium matrix. The results also proved that improvement of 24% in Hardness, 29.8% in Ultimate tensile strength due to addition of particles.
      PubDate: Apr 2017
       
  • Heavy Metal (Pb and Cd) Removal Potential of Cactus Powder in Ground Water
           at Adigrat

    • Abstract: Publication date:  Apr 2017
      Source:Chemical and Materials Engineering  Volume  5  Number  2  Tessema Derbe Hailegebrial   The main objective of this study is to investigate the heavy metals (Pb and Cd) removal capability of cactus powder from ground water using FAAS adsorption techniques by considering the influence of contact time, adsorbent dose and temperature. The results revealed that adsorption of Pb and Cd ions increased as the dose of adsorbent increased at a certain limits. The heavy metal removal capability of cactus powder is affected by the present of NaCl salt. The heavy metal removal capability of cactus powder decreased from 65% up to 7% for Pb, and from 70% up to 14% for Cd as the dose of NaCl increased from 1g to 5g. This is due to the formation of outer sphere complex with the NaCl salt which screening the functional group of cactus powder from heavy metals. The heavy metal removal capability of cactus powder also increased with contact time. The adsorption rate initially increased from 20% to 58 % for Pb ion, and 17% to 43% for Cd ion when the contact time increased from 30-120 min. After 120 min, there was no significant change in heavy metal removal of both Pb and Cd ions. This might be due to end point at which adsorption phase reached at equilibrium. The percentage removal of Pb by cactus powder decreased from 65.05% to 29% as the temperature increased from 25℃ to 150℃. In similar condition, the percentage removal of Cd by cactus powder also decreased from 43% to 31% as the temperature increased from 25℃ to 150℃. This decrement in percentage removal of both Pb and Cd ions with increase temperature is due to the weak binding interaction between the active site of cactus powder and (Pb, Cd) ions which support physicosorption process.
      PubDate: Apr 2017
       
 
 
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