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    Wyświetlanie 1-4 z 4
    Tytuł:
    Fabrication and Investigation of the Charge/Discharge Characteristics of Zinc/PVA-KOH/Carbon Cell
    Autorzy:
    Saleem, M.
    Sayyad, M.
    Karimov, Kh
    Ahmad, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1585039.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.40.gk
    82.47.Jk
    84.60.-h
    Opis:
    Electrochemical properties of a zinc/polyvinyl alcohol-potassium hydroxide/carbon cell have been investigated. In this cell, PVA-KOH gel has been used as an electrolyte with PVA/KOH wt.% ratio of 60:40, while zinc and carbon rods served as electrodes. The cylindrical glass vessel of length 3.0 cm and of diameter 2.0 cm has been used as a cell compartment. The current-voltage characteristics and open circuit voltage-time, charge voltage/current-time and discharge voltage/current-time studies have been done. The open circuit voltage has been observed for 160 h. It has been found that the cell shows stability and is rechargeable, too.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 6; 1021-1024
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of operating parameters on production of bio-oil from fast pyrolysis of maize stalk in bubbling fluidized bed reactor
    Autorzy:
    Ali, N.
    Saleem, M.
    Shahzad, K.
    Hussain, S.
    Chughtai, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/779892.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fast pyrolysis
    bio-oil
    temperature
    particle size
    carrier gas flow rate
    maize stalk
    Opis:
    The yield and composition of pyrolysis products depend on the characteristics of feed stock and process operating parameters. Effect of particle size, reaction temperature and carrier gas flow rate on the yield of bio-oil from fast pyrolysis of Pakistani maize stalk was investigated. Pyrolysis experiments were performed at temperature range of 360-540°C, feed particle size of 1-2 mm and carrier gas flow rate of 7.0-13.0 m3/h (0.61.1 m/s superficial velocity). Bio-oil yield increased with the increase of temperature followed by a decreasing trend. The maximum yield of bio-oil obtained was 42 wt% at a temperature of 490°C with the particle size of around 1.0 mm and carrier gas flow rate of 11.0 m3/h (0.9 m/s superficial velocity). High temperatures resulted in the higher ratios of char and non-condensable gas.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 3; 88-96
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frequency Dependent Electrical Characteristics οf Au/n-Si/CuPc/Au Heterojunction
    Autorzy:
    Ahmad, Z.
    Sayyad, M.
    Karimov, Kh.
    Saleem, M.
    Shah, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538707.pdf
    Data publikacji:
    2010-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.Jv
    73.90.+f
    Opis:
    Electrical characteristics of the heterojunction fabricated by thermal deposition of copper phthalocyanine (CuPc) on an n-silicon substrate have been investigated. The frequency has significant effect on capacitance (C), conductance (G) and series resistance $(R_{s})$ interface states $(D_{it})$ of the junction. Measured capacitance and conductance were corrected for $R_{s}$. The conductance technique was used to measure the density of the interface states. This method revealed the value of the interface state density distribution for the Au/n-Si/CuPc/Au interfaces of the order of $10^{12} cm^{-2} eV^{-1}$.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 3; 493-496
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Site Preference Analysis and Ordering Characteristics of Ternary Cu0.5(Zn1–xMx)0.5 (M = Transition Metals) Alloys
    Autorzy:
    Ahmad, N.
    Ziya, A. B.
    Atiq, S.
    Saifullah, K.
    Hashim, M.
    Saleem, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/352693.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ternary alloy systems
    order-disorder transformations
    site occupancy
    ab-initio calculations
    ordering energies
    Opis:
    The site preference of some transition metals during B2-type ordering has been investigated in the ternary Cu0.5 (Zn1-x Mx )0.5 alloys with M = Ti, V, Ag, Au, Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Re or Pt (x ≤ 0.01). The statistic-o-thermodynamical theory combined with the electronic theory of alloys has been used to calculate the partial ordering energies, partial short range order parameters and the order-disorder transformation temperatures. The values of partial short range order parameters have been used to determine the site preference of the metal M. The analysis shows that the metals M can be divided into two groups with regard to lattice site occupancy. One group comprising of Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Re or Pt was found to prefer Zn sublattice sites, while the second group of Ti, V, Ag or Au atoms prefer Cu sublattice sites. It is found that order-disorder transformation temperature and the site preference of metal M both depend strongly on the partial ordering energies and ternary alloying addition of metal M.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1531-1535
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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