safa_elmasry

Safa El-masry

Teadching-Assistant - Lecturer

Faculty of science

Address: Sohag university-Faculty of science- Zoology department

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Publications Which contain the keyword: thermodynamic parameters

A comparative study for the effect of nano-sized Moringa oleifera and Delonix regia for removal heavy ions from water

2019-01-19 09:34:26 Keywords Heavy metals, Delonix regia pod, Moringa Oleifera, Nano structures, thermodynamic parameters, Kinetics, Adsorption, Water purification, Removal efficiency,
A comparative study for the effect of nano-sized Moringa oleifera and Delonix regia for removal heavy ions from water
The ability of natural biosorbents for removing heavy metal ionswere investigated by studying the effect of nano sized _Delonixregia _and _Moringa__ oleifera_on adsorption of Cd2+and Pb2+ions from aqueous solution. The investigated biosorbents (_Delonixregia_and _Moringa__oleifera)_ were characterized by FT-IR, SEM, TEM, XRD and EDS techniques.The influence of pH, temperature, adsorbent dosage, contact time and initial metal ion concentration on adsorption process ... Read more

The Hot and Cold Properties of Nuclear Matter

2018-10-30 21:39:33 Keywords thermodynamic parameters,
The Hot and Cold Properties of Nuclear Matter
The properties of nuclear matter at zero and finite temperatures in the frame of the Brueckner theory realistic nucleon-nucleon potentials are studied. Comparison with other calculations is made. In addition we present results for the symmetry energy obtained with different potentials, which is of great importance in astrophysical calculation. Properties of asymmetric nuclear matter are derived from various many-body approaches. ... Read more

Adsorption of the heavy metal ions onto biosorbents: A review

2018-10-12 08:40:27 Keywords Isotherm, Plant, Adsorption, Heavy metal, Biosorbent, Toxic, Removal, thermodynamic parameters, IR, Water purification, wastewater,
Adsorption of the heavy metal ions onto biosorbents: A review
Heavy metal pollution in result of human activities such as mining has become a critical environmental issue nowadays. Various methods for removing heavy metal from industrial wastewater have been investigated. This paper reviews an economic and environment friendly process known as biosorption. Biosorption is a potential alternative to the conventional treatment processes such as adsorption on activated carbon. Some factors ... Read more

Kinetic investigation of hydroxide ion and DNA attack on some high spin iron (II) chelates Bearing ONO Donors amino acid Schiff bases

2018-10-02 16:05:14 Keywords base catalyzed hydrolysis, Isomer, reaction mechanism, thermodynamic parameters, iron (II) chelates, high spin, DNA attack,
Kinetic investigation of hydroxide ion and DNA attack on some high spin iron (II) chelates Bearing ONO Donors amino acid Schiff bases
The reactivity of few novel high spin Fe(II) complexes of Schiff base ligands derived from 2-hydroxynaphthaldehyde and some variety of amino acids with OH- ion has been examined in aqueous mixture at temperature in the range 10–40 Co. Based on the kinetic investigations, the rate law and a plausible mechanism were proposed and discussed. The general rate equation was suggested ... Read more

Solvent Effects on The reactivity Trends of some Coumarin Derivatives

2018-10-01 09:26:19 Keywords Kinetics, Temperature, solvent effect, Coumarin Derivatives, thermodynamic parameters, Activation energy barrier, base hydrolysis, initial state transition state,
Solvent Effects on The reactivity Trends of some Coumarin Derivatives
Kinetic results, rate laws and reaction mechanisms were established for the base hydrolysis of 7-hydroxycoumarin (HC), 7-hydroxycoumarin-4-acetic acid (HCA), 6-nitrocoumarin (NC), 6-nitrocoumarin-3-carboxylic acid (NCC), 7-dimethylamino-4-methylcoumarin (DMAC), 7-diethylamino-4-methylcoumarin (DEAC) and coumalic acid (COU) in aqueous solution, water-methanol and water-acetone mixtures. The kinetics of the base hydrolysis followed a rate law with kobs= k2[OH-] for all coumarin derivatives under study except 6-nitrocoumarin-3-carboxylic ... Read more

Physicochemichal properties, DNA interaction, antiviral and antioxidant activities of some Amino Acid Imine Chelates

2018-10-01 13:38:05 Keywords Antiviral, Antioxidant activity, DNA interaction, amino acid, Imine Chelates, Antimicrobial activity, IR, TGA, thermodynamic parameters,
Physicochemichal properties, DNA interaction, antiviral and antioxidant activities of some Amino Acid Imine Chelates
Schiff base amino acid ligands which derived from the condensation of 3-methoxysalicylaldehyde (MS) or 4-diethylaminosalicylaldehyde (DS) with some of α-amino acids (Phenylalanine (Phe), Histidine (His), Tryptophan (Trp)) were prepared. Moreover, eleven Schiff base amino acid binary Fe(II) and Cu(II) complexes were prepared. In addition to, five ternary Cu(II) complexes which derived from the prepared Schiff base amino acid ligands as ... Read more

Kinetic study of the hydroxide ion attack on and DNA interaction with high spin iron(II) Schiff base amino acid chelates baering ONO donors

2018-09-16 13:53:29 Keywords Substituent effect, base catalyzed hydrolysis, Reactivity, reaction mechanism, thermodynamic parameters, DNA interaction,
Kinetic study of the hydroxide ion attack on and DNA interaction with high spin iron(II) Schiff base amino acid chelates baering ONO donors
Kinetic study of some novel high spin Fe(II) complexes of Schiff base ligands derived from 5-bromsalicyaldehyde and amino acids with the OH− ion and DNA has been carried out. Based on the kinetic data, the rate law and a plausible mechanism were proposed. Kinetic data of the base catalyzed hydrolysis imply pseudo first-order double stage process due to the presence ... Read more

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