Molecular, Surface, Thermodynamic Properties and Biodegradability of Nonionic Surfactants Based on Castor Oil

2009 ◽  
Vol 46 (5) ◽  
pp. 272-278 ◽  
Author(s):  
E. A. M. Gad ◽  
E. M. S. Azzam ◽  
I. Aiad ◽  
W. I. M. El-azab
Keyword(s):  
Thermodynamic Properties ◽  
Castor Oil ◽  
Nonionic Surfactants ◽  
Molecular Surface

Molecular, Surface, and Thermodynamic Properties of Nonionic Surfactants Based on Castor Oil

2010 ◽  
Vol 31 (8) ◽  
pp. 1150-1156 ◽  
Author(s):  
W. I. M. El-Azab ◽  
I. Aiad ◽  
E. M. S. Azzam ◽  
E. A. M. Gad
Keyword(s):  
Thermodynamic Properties ◽  
Castor Oil ◽  
Nonionic Surfactants ◽  
Molecular Surface

Synthesis, Surface and Thermodynamic Properties of Substituted Polytriethanolamine Nonionic Surfactants

2012 ◽  
Vol 16 (3) ◽  
pp. 333-342 ◽  
Author(s):  
Nabel A. Negm ◽  
Ahmed F. El-Farargy ◽  
Salah M. Tawfik ◽  
Ahmad M. Abdelnour ◽  
Hassan H. Hefni ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Nonionic Surfactants

Novel Polymerizable Nonionic Surfactants (Surfmers) Corporate with Alkenylsuccinic Anhydride: Synthesis, Surface, and Thermodynamic Properties

2012 ◽  
Vol 33 (10) ◽  
pp. 1458-1469 ◽  
Author(s):  
A. M. Al-Sabagh ◽  
Nadia G. Kandile ◽  
Rasha A. El-Ghazawy ◽  
M. R. Noor El-Din ◽  
E. A. El-Sharaky
Keyword(s):  
Thermodynamic Properties ◽  
Nonionic Surfactants ◽  
Alkenylsuccinic Anhydride

scholarly journals Preparation and Characterization of Oil Nanoemulsion Formulations of Beauveria bassiana (Bals.-Criv.)

2021 ◽  
Vol 34 (2) ◽  
pp. 75-87
Author(s):  
Ali Z. A. Alhilfi ◽  
Ali Z. A. Alhilfi ◽  
Wael A. Swadi ◽  
Agha M. Ahmed
Keyword(s):  
Beauveria Bassiana ◽  
Castor Oil ◽  
Surfactant Concentration ◽  
Nonionic Surfactants ◽  
Germination Rate ◽  
Tween 80 ◽  
Tween 20 ◽  
Oil Emulsion ◽  
Water In Oil Emulsion

This study aims to prepper stable thermodynamically dilutable nanoemulsion formulation of Beauveria bassiana with the lowest surfactant concentration that could improve its solubility stability. Formulations were prepared from oil in the water nanoemulsion region of phase diagrams subjected to thermodynamic stability tests. We found propanetriol was the highest germination rate at 5% and 10% concentration, 46.66 and 53.33%, respectively. Castor oil achieved a 43.00 germination rate at 1%. Tween 80 gave 54.33 % germination rate at 10%. While Tween 20 showed a 48 % germination rate at 5%. At the concentration, 1% Term 1284 gave 43.33% rate germination. Nanoemulsion composed of propanetriol and nonionic surfactants, with a mean particle size ranging from 25.08 to 75.35 nm, was formulated for various concentrations of the oils and surfactants. Water in oil emulsion was prepared using propanetriol oil, Tween 20, Tween 80, Term 1284, and water. Nanoemulsion of 25.08, 33.75, and 75.35 nm size was obtained at a 45: 15 % ratio of oil and surfactant, and it was found to be stable. The larger droplet size 75.35 nm of formulation Tween 20 and the smaller size was 25.08 nm in the formulation of Term 1284. The higher viscosity value was 16 mPas of formulation Tween 80, and the lowest value was 7.80 in the formulation of Term 1284. To demonstrate the possible employment of these systems, they were used to formulate a nanoformulation pesticide.

Surface and Thermodynamic Properties of Nonionic Surfactants Based on Rosin-Maleic Anhydride and Acrylic Acid Adducts

2010 ◽  
Vol 31 (4) ◽  
pp. 567-576 ◽  
Author(s):  
Ayman M. Atta ◽  
Ahmed F. El-Kafrawy ◽  
Manar E. Abdel-Rauf ◽  
Nermine E. Maysour ◽  
Amani K. Gafer
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Thermodynamic Properties ◽  
Nonionic Surfactants

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

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