ABSTRACT Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP... more ABSTRACT Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP) was investigated under flowing conditions by using mass loss and electrochemical methods. The surface morphology was characterized by SEM coupled with EDX spectra. Comparable results show that SNP acts as a mixed-type inhibitor with predominantly cathodic effectiveness, suppressing corrosion process by physical adsorption on copper surface. The highest inhibition efficiency obtained from mass loss, polarization and EIS measurements are 92.7, 94.8 and 97.1% respectively at 120 mg/L of SNP. The influence of the temperature rising on the inhibitor efficiency of SNP has been studied and activation energy has been calculated. Surface morphology observations evidenced the formation of a protective film of SNP over metal surface.
Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP)... more Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP) was investigated under flowing conditions by using mass loss and electrochemical methods. The surface morphology was characterized by SEM coupled with EDX spectra. Comparable results show that SNP acts as a mixed-type inhibitor with predominantly cathodic effectiveness, suppressing corrosion process by physical adsorption on copper surface. The highest inhibition efficiency obtained from mass loss, polarization and EIS measurements are 92.7, 94.8 and 97.1% respectively at 120 mg/L of SNP. The influence of the temperature rising on the inhibitor efficiency of SNP has been studied and activation energy has been calculated. Surface morphology observations evidenced the formation of a protective film of SNP over metal surface.
ABSTRACT The inhibiting action of novel inorganic compound (NaCo(H2PO3)3.H2O) (NaCoPh) synthesize... more ABSTRACT The inhibiting action of novel inorganic compound (NaCo(H2PO3)3.H2O) (NaCoPh) synthesized in our laboratory on the corrosion of aluminum in engine coolant solution has been studied. In this study, potentiodynamic polarization measurements with SEM–EDX investigations were employed. Polarization curves reveal that NaCoPh is mixed type (cathodic/anodic) inhibitor for aluminum corrosion in the engine coolant solution. The inhibition efficiency increases with increasing concentration of NaCoPh but decreases with increasing temperature and flow rate. SEM/EDX investigations reveal that adsorption of NaCoPh on the aluminum surface. A mixed adsorption (physisorption and chemisorption) for NaCoPh was proposed.
Polish journal of microbiology / Polskie Towarzystwo Mikrobiologów = The Polish Society of Microbiologists, 2010
Thirty nine isolates of Escherichia coli, twenty two isolates of Klebsiella pneumoniae and sixtee... more Thirty nine isolates of Escherichia coli, twenty two isolates of Klebsiella pneumoniae and sixteen isolates of Pseudomonas aeruginosa isolated from urinary tract infected patients were analyzed by antimicrobial susceptibility typing and random amplified polymorphic DNA (RAPD)-PCR. Antibiotic susceptibility testing was carried out by microdilution and E Test methods. From the antibiotic susceptibility, ten patterns were recorded (four for E. coli, three for K. pneumoniae and three for P. aeruginosa respectively). Furthermore, genotyping showed seventeen RAPD patterns (seven for E. coli, five for K. pneumoniae and five for P. aeruginosa respectively). In this study, differentiation of strains of E. coli, K. pneumoniae and P. aeruginosa from nosocomial infection was possible with the use of RAPD.
The inhibition effect of ethoxylated fatty acids were used as inhibitors for the corrosion of zin... more The inhibition effect of ethoxylated fatty acids were used as inhibitors for the corrosion of zinc metal in 1.0 M hydrochloric and 1.0 M sulfuric acid solutions at various temperatures ranging from 25 to 55 • C is investigated by weight loss measurement and electrochemical methods. The protection efficiency depends upon the type and concentration of the inhibitor and the nature of the acid medium. In both acid solutions the protection efficiencies of the inhibitors decrease with the increase in temperature. The inhibition was assumed to occur via the adsorption of the fatty acid molecules on the metal surface. The thermodynamic functions of dissolution and adsorption processes were calculated and discussed.
The corrosion of tin electrode in sodium borate (Na 2 B 4 O 7 ) solutions was investigated using ... more The corrosion of tin electrode in sodium borate (Na 2 B 4 O 7 ) solutions was investigated using cyclic voltammetry and potentiostatic current transient techniques. In absence of halide ions, the E/j response exhibits active/passive transition. The active region involves one anodic peak corresponding to the formation of Sn(OH) 2 and/or SnO. Addition of Cl À , Br À or I À (C 6 0.01 M) ions inhibits the active dissolution of tin, but higher concentrations enhance the active dissolution and tend to breakdown the passive film and induce pitting attack. The effect of WO 2À 4 , MoO 2À 4 , NO À 2 and NO À 3 as inorganic inhibitors on the pitting corrosion of tin in (0.1 M Na 2 B 4 O 7 + 0.1 M NaCl) solution has also been studied. The presence of these anions (except NO À 3 ) inhibits pitting corrosion. Chronoamperometry measurements showed that nucleation of pit takes place after an incubation time (t i ). The rate of pit nucleation (t À1 i ) increases with increasing halide ions concentration and applied potentials, but decreases with increasing the concentration of the inorganic inhibitors (except NO À 3 ). The inhibition efficiency of these inhibitors decreases in the order:
This paper studies happiness among Turkish and Moroccan immigrants in the Netherlands in relati... more This paper studies happiness among Turkish and Moroccan immigrants in the Netherlands in relation to social comparison and social identity. The statistics demonstrate that Moroccans, although they have lower income levels and higher unemployment rates than ...
This article examines the many claims that education in Canada is exclusive to the provincial gov... more This article examines the many claims that education in Canada is exclusive to the provincial governments. These claims are throughout the literature, texts, reports from provincial and federal governments, and international organizations. Such claims allow the federal government ...
Proceedings Third IEEE Symposium on Computers and Communications. ISCC'98. (Cat. No.98EX166), 1998
Single hidden layer feed forward neural networks with different number of hidden neurons are used... more Single hidden layer feed forward neural networks with different number of hidden neurons are used for image data compression. A subimage of size 4×4 pixels forms the input vector of size 16 pixels. The hidden vector, which is the output of the hidden layer whose size is smaller than that of the input vector represents the compressed form of the
ABSTRACT Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP... more ABSTRACT Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP) was investigated under flowing conditions by using mass loss and electrochemical methods. The surface morphology was characterized by SEM coupled with EDX spectra. Comparable results show that SNP acts as a mixed-type inhibitor with predominantly cathodic effectiveness, suppressing corrosion process by physical adsorption on copper surface. The highest inhibition efficiency obtained from mass loss, polarization and EIS measurements are 92.7, 94.8 and 97.1% respectively at 120 mg/L of SNP. The influence of the temperature rising on the inhibitor efficiency of SNP has been studied and activation energy has been calculated. Surface morphology observations evidenced the formation of a protective film of SNP over metal surface.
Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP)... more Inhibition of copper corrosion in cooling seawater by novel pyrophosphate molecule SrNiP2O7 (SNP) was investigated under flowing conditions by using mass loss and electrochemical methods. The surface morphology was characterized by SEM coupled with EDX spectra. Comparable results show that SNP acts as a mixed-type inhibitor with predominantly cathodic effectiveness, suppressing corrosion process by physical adsorption on copper surface. The highest inhibition efficiency obtained from mass loss, polarization and EIS measurements are 92.7, 94.8 and 97.1% respectively at 120 mg/L of SNP. The influence of the temperature rising on the inhibitor efficiency of SNP has been studied and activation energy has been calculated. Surface morphology observations evidenced the formation of a protective film of SNP over metal surface.
ABSTRACT The inhibiting action of novel inorganic compound (NaCo(H2PO3)3.H2O) (NaCoPh) synthesize... more ABSTRACT The inhibiting action of novel inorganic compound (NaCo(H2PO3)3.H2O) (NaCoPh) synthesized in our laboratory on the corrosion of aluminum in engine coolant solution has been studied. In this study, potentiodynamic polarization measurements with SEM–EDX investigations were employed. Polarization curves reveal that NaCoPh is mixed type (cathodic/anodic) inhibitor for aluminum corrosion in the engine coolant solution. The inhibition efficiency increases with increasing concentration of NaCoPh but decreases with increasing temperature and flow rate. SEM/EDX investigations reveal that adsorption of NaCoPh on the aluminum surface. A mixed adsorption (physisorption and chemisorption) for NaCoPh was proposed.
Polish journal of microbiology / Polskie Towarzystwo Mikrobiologów = The Polish Society of Microbiologists, 2010
Thirty nine isolates of Escherichia coli, twenty two isolates of Klebsiella pneumoniae and sixtee... more Thirty nine isolates of Escherichia coli, twenty two isolates of Klebsiella pneumoniae and sixteen isolates of Pseudomonas aeruginosa isolated from urinary tract infected patients were analyzed by antimicrobial susceptibility typing and random amplified polymorphic DNA (RAPD)-PCR. Antibiotic susceptibility testing was carried out by microdilution and E Test methods. From the antibiotic susceptibility, ten patterns were recorded (four for E. coli, three for K. pneumoniae and three for P. aeruginosa respectively). Furthermore, genotyping showed seventeen RAPD patterns (seven for E. coli, five for K. pneumoniae and five for P. aeruginosa respectively). In this study, differentiation of strains of E. coli, K. pneumoniae and P. aeruginosa from nosocomial infection was possible with the use of RAPD.
The inhibition effect of ethoxylated fatty acids were used as inhibitors for the corrosion of zin... more The inhibition effect of ethoxylated fatty acids were used as inhibitors for the corrosion of zinc metal in 1.0 M hydrochloric and 1.0 M sulfuric acid solutions at various temperatures ranging from 25 to 55 • C is investigated by weight loss measurement and electrochemical methods. The protection efficiency depends upon the type and concentration of the inhibitor and the nature of the acid medium. In both acid solutions the protection efficiencies of the inhibitors decrease with the increase in temperature. The inhibition was assumed to occur via the adsorption of the fatty acid molecules on the metal surface. The thermodynamic functions of dissolution and adsorption processes were calculated and discussed.
The corrosion of tin electrode in sodium borate (Na 2 B 4 O 7 ) solutions was investigated using ... more The corrosion of tin electrode in sodium borate (Na 2 B 4 O 7 ) solutions was investigated using cyclic voltammetry and potentiostatic current transient techniques. In absence of halide ions, the E/j response exhibits active/passive transition. The active region involves one anodic peak corresponding to the formation of Sn(OH) 2 and/or SnO. Addition of Cl À , Br À or I À (C 6 0.01 M) ions inhibits the active dissolution of tin, but higher concentrations enhance the active dissolution and tend to breakdown the passive film and induce pitting attack. The effect of WO 2À 4 , MoO 2À 4 , NO À 2 and NO À 3 as inorganic inhibitors on the pitting corrosion of tin in (0.1 M Na 2 B 4 O 7 + 0.1 M NaCl) solution has also been studied. The presence of these anions (except NO À 3 ) inhibits pitting corrosion. Chronoamperometry measurements showed that nucleation of pit takes place after an incubation time (t i ). The rate of pit nucleation (t À1 i ) increases with increasing halide ions concentration and applied potentials, but decreases with increasing the concentration of the inorganic inhibitors (except NO À 3 ). The inhibition efficiency of these inhibitors decreases in the order:
This paper studies happiness among Turkish and Moroccan immigrants in the Netherlands in relati... more This paper studies happiness among Turkish and Moroccan immigrants in the Netherlands in relation to social comparison and social identity. The statistics demonstrate that Moroccans, although they have lower income levels and higher unemployment rates than ...
This article examines the many claims that education in Canada is exclusive to the provincial gov... more This article examines the many claims that education in Canada is exclusive to the provincial governments. These claims are throughout the literature, texts, reports from provincial and federal governments, and international organizations. Such claims allow the federal government ...
Proceedings Third IEEE Symposium on Computers and Communications. ISCC'98. (Cat. No.98EX166), 1998
Single hidden layer feed forward neural networks with different number of hidden neurons are used... more Single hidden layer feed forward neural networks with different number of hidden neurons are used for image data compression. A subimage of size 4×4 pixels forms the input vector of size 16 pixels. The hidden vector, which is the output of the hidden layer whose size is smaller than that of the input vector represents the compressed form of the
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