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Corrosion Inhibition of 316 Stainless Steel in 20%(W/W) HCl Solution using Dithizone
Mohamed Nuri Rahuma,
Fadwa Mahamed Al-Sonosy,
Atega Mohamed Al-Frjany
Issue:
Volume 2, Issue 1, February 2014
Pages:
1-5
Received:
5 January 2014
Published:
30 January 2014
Abstract: The inhibiting effect of dithizone (Diphenylthiocarbazone) has been studied regarding the corrosion of 316 stainless steel in 20% w/w HCl at 35C. The effects of the inhibitor have been demonstrated using weight loss measurements. The increase of the inhibitor concentration leads to a decrease in the corrosion rate. This indicates a good adsorbability of dithizone (Diphenylthiocarbazone) on the metal surface. The value of ΔGad s has been calculated and dithizone has the potent to interact with 316 stainless steel through semi-physiosorption and/or semi-chemisorptions.
Abstract: The inhibiting effect of dithizone (Diphenylthiocarbazone) has been studied regarding the corrosion of 316 stainless steel in 20% w/w HCl at 35C. The effects of the inhibitor have been demonstrated using weight loss measurements. The increase of the inhibitor concentration leads to a decrease in the corrosion rate. This indicates a good adsorbabil...
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Vegetable Oils Extraction of Polycyclic Aromatic Hydrocarbons from an Algerian Quagmire
Berrabia Nadjet,
Pemanos Yelda Bakoz,
Gherbi Abdellah,
Hamada Boudjema
Issue:
Volume 2, Issue 1, February 2014
Pages:
6-9
Received:
2 February 2014
Published:
10 March 2014
Abstract: Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic substances which are resistant to environmental degradation due to their high hydrophobic nature. Soil contaminated with PAHs pose potential risks to human and ecological health, therefore concern over their adverse effects have resulted in extensive studies on their removal from contaminated soils. The main propose of this work was to extract this pollutants from two real quagmire samples from the region of Hassi Messaoud (Algeria), using three kinds of vegetable oils (Peanut oil, rapeseed oil, and coconut oil) which are naturals, cost effectives, and biodegradables extractors at two different temperatures (30 and 70 °C). Three PAHs that are representing of their present in contaminated quagmire were characterized using IR-FTIR and HPLC.
Abstract: Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic substances which are resistant to environmental degradation due to their high hydrophobic nature. Soil contaminated with PAHs pose potential risks to human and ecological health, therefore concern over their adverse effects have resulted in extensive studies on their removal from contaminated...
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Synthesis of a Biobased Antioxidant Additive for Diesel Fuel
Chikh Sabrina,
Pemanos Yelda Bakoz,
Zourane Tinhinane,
Hamada Boudjema
Issue:
Volume 2, Issue 1, February 2014
Pages:
10-14
Received:
5 February 2014
Published:
10 March 2014
Abstract: In this study, our objective is to synthesize a biobased antioxidant additive for Diesel fuel during the storage. Our choice was made particularly on the olive oil as raw material because of its oleic acid content which is more to 75%. The processes involved were epoxidation of oleic acid of the olive oil, opening of the oxirane ring, and esterification. The structures of the products were confirmed by FTIR. To test the effectiveness of our biobased antioxidant additive, we carried out Accelerated Oxidation Test – AOT on diesel without additive (blank) and diesel with additive with various concentrations: 2000,4000 and 6000 ppm. The oxidative degradation of diesel with or without antioxidants was investigated by UV-visible spectroscopy was used to monitor the changes using peroxide value. A remarkable stability of diesel with antioxidant additive comparing with the blank confirms the inhibition of the oxidation phoneme and thus of the good efficiency of antioxidant additive from the optimal concentration of 2000ppm.
Abstract: In this study, our objective is to synthesize a biobased antioxidant additive for Diesel fuel during the storage. Our choice was made particularly on the olive oil as raw material because of its oleic acid content which is more to 75%. The processes involved were epoxidation of oleic acid of the olive oil, opening of the oxirane ring, and esterific...
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Spectro-Magnetic and Antimicrobial Studies on some 3d Metal Complexes with Ethylenedianil of Ortho-Hydroxyphenylglyoxal
Ali Mohammed Yimer,
T. Baraki,
R. K. Upadhyay,
Masood Akhtar
Issue:
Volume 2, Issue 1, February 2014
Pages:
15-18
Received:
19 February 2014
Published:
20 March 2014
Abstract: The Cr(III), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes with a novel tetradentate ligand obtained by condensation of ethylenediamine with ortho-hydroxyphenylglyoxal have been synthesized and characterized by elemental analysis, molar conductance and magnetic susceptibility measurements, IR, UV-Visible and atomic absorption studies. The Cr(III), Fe(III) and Co(II) complexes possess six coordinate octahedral geometry whereas Ni(II), Cu(II) and Zn(II) complexes are square planar and tetrahedral respectively. Bactericidal and fungicidal activities of the compounds were evaluated in vitro by disc diffusion method. The perusal of antimicrobial activities of the compounds reveals that the complexes possess greater bactericidal and fungicidal activities against all the microbes in comparison to ligand which is due to their higher lipophilicity.
Abstract: The Cr(III), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes with a novel tetradentate ligand obtained by condensation of ethylenediamine with ortho-hydroxyphenylglyoxal have been synthesized and characterized by elemental analysis, molar conductance and magnetic susceptibility measurements, IR, UV-Visible and atomic absorption studies. The C...
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In Vitro Antimicrobial Screening of Metal Complexes of Schiff Base derived from Streptomycin and Amoxicillin: Synthesis, Characterization and Molecular Modelling
Narendra Kumar Chaudhary,
Parashuram Mishra
Issue:
Volume 2, Issue 1, February 2014
Pages:
19-26
Received:
26 February 2014
Published:
30 March 2014
Abstract: A series of three new metal (II) complexes of Schiff base were synthesized from the novel ligand derived from Streptomycin and Amoxicillin in stoichiometric ratio. They were characterized by elemental analysis and spectral techniques like IR, 1H NMR, electronic spectrum and mass spectrum. IR spectral data suggested that the tetradentate ligand has coordination to metal ions through azomethine nitrogen, glycosidic oxygen and two amine nitrogens. Electronic spectral measurement indicated square planar geometry of Ni and Zn-complexes and tetrahedral geometry of Cu-complex with diamagnetic behavior. Molar conductivity measurements revealed non-electrolyte nature of the complexes where metal ions have coordination through doubly negative charged anions of the Schiff base. The thermal behavior (TGA/DTA) of the complexes was studied and kinetic parameters were determined by Coats-Redfern method. XRPD technique revealed monoclinic crystal systems for Ni- and Zn-complexes and hexagonal crystal system for Cu-complex. The possible geometries of the metal complexes with their bond length were optimized by MM2 calculations using CsChem3D Ultra-11 program package software. Antibacterial sensitivity of the ligand and its metal complexes were assayed in vitro against four bacterial pathogens viz. E. coli, B. subtilis, S. aureus and K. pneumonia by Kirby Bauer paper disc diffusion method and showed moderate to better potency.
Abstract: A series of three new metal (II) complexes of Schiff base were synthesized from the novel ligand derived from Streptomycin and Amoxicillin in stoichiometric ratio. They were characterized by elemental analysis and spectral techniques like IR, 1H NMR, electronic spectrum and mass spectrum. IR spectral data suggested that the tetradentate ligand has ...
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