The performance, efficiency of consumed feed, body chemical composition, survival rate, antioxida... more The performance, efficiency of consumed feed, body chemical composition, survival rate, antioxidant and immunity parameters of Nile tilapia (Oreochromis niloticus) reared in probiotic-treated water were studied. Two hundred apparently healthy Nile tilapia (20 ± 0.3 g) juveniles were reared for 70 days in five different treatments, with five replications as the control group (clean water) and four test groups with two probiotics strains (Bacillus toyonensisandGeobacillus stearothermophilus) at two different levels (1 or 2 × 105 CFU ml−1) applied in rearing water. Fish reared in water supplemented withG. stearothermophilusat low level demonstrated significantly enhanced (p < 0.05) growth performances in terms of final body weight (FBW), weight gain (WG), daily weight gain (DWG), specific growth rate (SGR), and relative growth rate (RGR) compared to the control group. In the same context, supplied fish rearing water a lower amount ofG. stearothermophilus(GS1) remarkedly reduced feed...
881-882A new hydroxyl-ion selective poly(vinyl chloride)- membrane electrode based on chlorpromaz... more 881-882A new hydroxyl-ion selective poly(vinyl chloride)- membrane electrode based on chlorpromazine base in the presence of sodium tetraphenyl borate has been prepared with dioctylphthalate as a plasticizer. The performance characteristics of the electrode have been studied. It exhibits a good Nernstian response at room temperature, over a relatively wide range of hydroxyl ion concentrations and is highly selective toward a large number of inorganic anions
A PVC membrane electrode of the coated wire type was prepared which is selective for thioredazine... more A PVC membrane electrode of the coated wire type was prepared which is selective for thioredazine. It showed a Nernstian response over a thioredazine concentration range 6.3 x 10 «to 2.5 x 10_3M, at 25°C, and was selective, precise, and usable within the pH range 2.1-7.0. The standard electrode potentials, E°, were determined at different temperatures and used to calculate the isothermal temperature coefficient of the electrode. The photoreaction occurring in thioredazine solution exposed to daylight did not affect the electrode performance. This reaction was investigated kinetically to determine its rate constant and half-life at different temperatures.
New quininium (Qn) plastic membrane electrodes of the conventional type were constructed and char... more New quininium (Qn) plastic membrane electrodes of the conventional type were constructed and characterized. They are based on incorporation of Qn‐reineckate (QnRn) ion‐pair, Qn‐phosphotungstate (Qn3‐PT), or Qn‐phosphomolybdate (Qn3PM) ion associate into a poly(vinyl chloride) membrane. The electrodes are selective for Qn and have been successfully used for the determination of Qn2SO4 in pharmaceutical tablets. Nevertheless, they showed, as almost all other ion‐selective electrodes, limited life times. Energy dispersive‐ (EDS) and X‐ray photoelectron spectroscopy (XPS), as well as electron microscopy were applied to investigate the cause of this limitation in the life times of the electrodes. The results indicated that the electrodes lose their activity after prolonged soaking as a result of leaching of the ion exchanger from the membranes into the test solution in addition to deformation at the surface of the expired electrode.
Page 1. ANALYST, AUGUST 1988, VOL. 113 1305 Use of Two Ion-selective Electrode-containing Cells f... more Page 1. ANALYST, AUGUST 1988, VOL. 113 1305 Use of Two Ion-selective Electrode-containing Cells for Potentiometric Titration of Hexadecylpyridinium Bromide Adel F. Shoukry Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt ...
Proceedings of the National Academy of Sciences, 2013
Functional organic thin films often demand precise control over the nanometer-level structure. In... more Functional organic thin films often demand precise control over the nanometer-level structure. Interlayer diffusion of materials may destroy this precise structure; therefore, a better understanding of when interlayer diffusion occurs and how to control it is needed. X-ray photoelectron spectroscopy paired with C 60 + cluster ion sputtering enables high-resolution analysis of the atomic composition and chemical state of organic thin films with depth. Using this technique, we explore issues common to the polyelectrolyte multilayer field, such as the competition between hydrogen bonding and electrostatic interactions in multilayers, blocking interlayer diffusion of polymers, the exchange of film components with a surrounding solution, and the extent and kinetics of interlayer diffusion. The diffusion coefficient of chitosan (M = ∼100 kDa) in swollen hydrogen-bonded poly(ethylene oxide)/poly(acrylic acid) multilayer films was examined and determined to be 1.4*10 −12 cm 2 /s. Using the ...
Page 1. Mikrochim. Acta [Wien] 1989, III, 101-108 Mikrochimica Acta 9 by Springer-Verlag 1989 Pot... more Page 1. Mikrochim. Acta [Wien] 1989, III, 101-108 Mikrochimica Acta 9 by Springer-Verlag 1989 Potentiometric Sensor for Phenylephrine Based on Phenylephrine-tetraphenylborate Lipophilic Salt Adel FI Shoukry 1&amp;amp;#x27;*, Ragaa El-Sheikh 2, Yousry M. Issa 1, and Mohsen Zareh 2 ...
A new procedure for the determination of amprolium hydrochloride by reaction with bromocresol gre... more A new procedure for the determination of amprolium hydrochloride by reaction with bromocresol green (BCG), bromophenol blue (BPB) and bromothymol blue (BTB) has been developed. The method consists of extracting the yellow ion-pair formed into chloroform from aqueous medium. The ion-pairs have absorption maxima at 420, 410 and 415 nm with molar absorptivities of 3.64 × 104, 3.12 × 104
Abstract. Ion-association complexes of antazoline HC1 iI], hydralazine HC1 [II], amiloride HC1 [I... more Abstract. Ion-association complexes of antazoline HC1 iI], hydralazine HC1 [II], amiloride HC1 [III] and quinine sulphate [IV] with leo(SeN)4] 2-and [Co(NO2)6] 3-were precipitated and the excess unreacted cobalt complex was determined. A new method using atomic emission ...
Journal of Chemical Technology & Biotechnology, 1995
Lignocaine (Lg) selective PVC membrane electrodes based on the ionassociates lignocaine‐cobalt th... more Lignocaine (Lg) selective PVC membrane electrodes based on the ionassociates lignocaine‐cobalt thiocynate (I), lignocaine–phosphomolybdate (II) and lingnocaine–reinckate (III) were constructed. The electrodes exhibited linear response over the concentration ranges 0.02–100, 0.01–100 and 0.01–10 mM for I, II and III, respectively. pH did not effect the electrodes performance within the ranges 3–6, 3–7 and 3–6·5 for 10−2, 10−3 and 10−4 M LgHCl, respectively. Interferences are negligible for many inorganic cation, sugars and amino acids. The isothermal coefficients were found to be 0·000459, 0·000698 and 0·000404 V °C−1 for I, II and III, respectively. The life spans of the electrodes are more than 2 months of continuous work. Potentiometric titration and the standard addition method were used to determine LgGCl in pure solutions and in pharmaceutical preparations with high accuracy and precision.
Journal of Chemical Technology AND Biotechnology, 1994
... for Determination of Trimethoprim Mahmoud Aboudan Chemistry Department, Faculty of Science, A... more ... for Determination of Trimethoprim Mahmoud Aboudan Chemistry Department, Faculty of Science, Aleppo University, Aleppo, Syria Yousry M. Issa &amp;amp;amp;amp; Adel F. Shoukry Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt ...
The performance, efficiency of consumed feed, body chemical composition, survival rate, antioxida... more The performance, efficiency of consumed feed, body chemical composition, survival rate, antioxidant and immunity parameters of Nile tilapia (Oreochromis niloticus) reared in probiotic-treated water were studied. Two hundred apparently healthy Nile tilapia (20 ± 0.3 g) juveniles were reared for 70 days in five different treatments, with five replications as the control group (clean water) and four test groups with two probiotics strains (Bacillus toyonensisandGeobacillus stearothermophilus) at two different levels (1 or 2 × 105 CFU ml−1) applied in rearing water. Fish reared in water supplemented withG. stearothermophilusat low level demonstrated significantly enhanced (p < 0.05) growth performances in terms of final body weight (FBW), weight gain (WG), daily weight gain (DWG), specific growth rate (SGR), and relative growth rate (RGR) compared to the control group. In the same context, supplied fish rearing water a lower amount ofG. stearothermophilus(GS1) remarkedly reduced feed...
881-882A new hydroxyl-ion selective poly(vinyl chloride)- membrane electrode based on chlorpromaz... more 881-882A new hydroxyl-ion selective poly(vinyl chloride)- membrane electrode based on chlorpromazine base in the presence of sodium tetraphenyl borate has been prepared with dioctylphthalate as a plasticizer. The performance characteristics of the electrode have been studied. It exhibits a good Nernstian response at room temperature, over a relatively wide range of hydroxyl ion concentrations and is highly selective toward a large number of inorganic anions
A PVC membrane electrode of the coated wire type was prepared which is selective for thioredazine... more A PVC membrane electrode of the coated wire type was prepared which is selective for thioredazine. It showed a Nernstian response over a thioredazine concentration range 6.3 x 10 «to 2.5 x 10_3M, at 25°C, and was selective, precise, and usable within the pH range 2.1-7.0. The standard electrode potentials, E°, were determined at different temperatures and used to calculate the isothermal temperature coefficient of the electrode. The photoreaction occurring in thioredazine solution exposed to daylight did not affect the electrode performance. This reaction was investigated kinetically to determine its rate constant and half-life at different temperatures.
New quininium (Qn) plastic membrane electrodes of the conventional type were constructed and char... more New quininium (Qn) plastic membrane electrodes of the conventional type were constructed and characterized. They are based on incorporation of Qn‐reineckate (QnRn) ion‐pair, Qn‐phosphotungstate (Qn3‐PT), or Qn‐phosphomolybdate (Qn3PM) ion associate into a poly(vinyl chloride) membrane. The electrodes are selective for Qn and have been successfully used for the determination of Qn2SO4 in pharmaceutical tablets. Nevertheless, they showed, as almost all other ion‐selective electrodes, limited life times. Energy dispersive‐ (EDS) and X‐ray photoelectron spectroscopy (XPS), as well as electron microscopy were applied to investigate the cause of this limitation in the life times of the electrodes. The results indicated that the electrodes lose their activity after prolonged soaking as a result of leaching of the ion exchanger from the membranes into the test solution in addition to deformation at the surface of the expired electrode.
Page 1. ANALYST, AUGUST 1988, VOL. 113 1305 Use of Two Ion-selective Electrode-containing Cells f... more Page 1. ANALYST, AUGUST 1988, VOL. 113 1305 Use of Two Ion-selective Electrode-containing Cells for Potentiometric Titration of Hexadecylpyridinium Bromide Adel F. Shoukry Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt ...
Proceedings of the National Academy of Sciences, 2013
Functional organic thin films often demand precise control over the nanometer-level structure. In... more Functional organic thin films often demand precise control over the nanometer-level structure. Interlayer diffusion of materials may destroy this precise structure; therefore, a better understanding of when interlayer diffusion occurs and how to control it is needed. X-ray photoelectron spectroscopy paired with C 60 + cluster ion sputtering enables high-resolution analysis of the atomic composition and chemical state of organic thin films with depth. Using this technique, we explore issues common to the polyelectrolyte multilayer field, such as the competition between hydrogen bonding and electrostatic interactions in multilayers, blocking interlayer diffusion of polymers, the exchange of film components with a surrounding solution, and the extent and kinetics of interlayer diffusion. The diffusion coefficient of chitosan (M = ∼100 kDa) in swollen hydrogen-bonded poly(ethylene oxide)/poly(acrylic acid) multilayer films was examined and determined to be 1.4*10 −12 cm 2 /s. Using the ...
Page 1. Mikrochim. Acta [Wien] 1989, III, 101-108 Mikrochimica Acta 9 by Springer-Verlag 1989 Pot... more Page 1. Mikrochim. Acta [Wien] 1989, III, 101-108 Mikrochimica Acta 9 by Springer-Verlag 1989 Potentiometric Sensor for Phenylephrine Based on Phenylephrine-tetraphenylborate Lipophilic Salt Adel FI Shoukry 1&amp;amp;#x27;*, Ragaa El-Sheikh 2, Yousry M. Issa 1, and Mohsen Zareh 2 ...
A new procedure for the determination of amprolium hydrochloride by reaction with bromocresol gre... more A new procedure for the determination of amprolium hydrochloride by reaction with bromocresol green (BCG), bromophenol blue (BPB) and bromothymol blue (BTB) has been developed. The method consists of extracting the yellow ion-pair formed into chloroform from aqueous medium. The ion-pairs have absorption maxima at 420, 410 and 415 nm with molar absorptivities of 3.64 × 104, 3.12 × 104
Abstract. Ion-association complexes of antazoline HC1 iI], hydralazine HC1 [II], amiloride HC1 [I... more Abstract. Ion-association complexes of antazoline HC1 iI], hydralazine HC1 [II], amiloride HC1 [III] and quinine sulphate [IV] with leo(SeN)4] 2-and [Co(NO2)6] 3-were precipitated and the excess unreacted cobalt complex was determined. A new method using atomic emission ...
Journal of Chemical Technology & Biotechnology, 1995
Lignocaine (Lg) selective PVC membrane electrodes based on the ionassociates lignocaine‐cobalt th... more Lignocaine (Lg) selective PVC membrane electrodes based on the ionassociates lignocaine‐cobalt thiocynate (I), lignocaine–phosphomolybdate (II) and lingnocaine–reinckate (III) were constructed. The electrodes exhibited linear response over the concentration ranges 0.02–100, 0.01–100 and 0.01–10 mM for I, II and III, respectively. pH did not effect the electrodes performance within the ranges 3–6, 3–7 and 3–6·5 for 10−2, 10−3 and 10−4 M LgHCl, respectively. Interferences are negligible for many inorganic cation, sugars and amino acids. The isothermal coefficients were found to be 0·000459, 0·000698 and 0·000404 V °C−1 for I, II and III, respectively. The life spans of the electrodes are more than 2 months of continuous work. Potentiometric titration and the standard addition method were used to determine LgGCl in pure solutions and in pharmaceutical preparations with high accuracy and precision.
Journal of Chemical Technology AND Biotechnology, 1994
... for Determination of Trimethoprim Mahmoud Aboudan Chemistry Department, Faculty of Science, A... more ... for Determination of Trimethoprim Mahmoud Aboudan Chemistry Department, Faculty of Science, Aleppo University, Aleppo, Syria Yousry M. Issa &amp;amp;amp;amp; Adel F. Shoukry Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt ...
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