Results 221 to 230 of about 285,519 (260)

Emission characteristics of SPAN-80 activated ZnS nanocolloids

Journal of Luminescence, 2012
Abstract Quantum surface effects (new emission bands, blueshifts, intensity enhancement) were observed in SPAN-80 activated ZnS nanocolloids and explained in terms of time-dependent density functional theory. The experimental evidences were demonstrated for both undoped and Cu, Mn-doped colloidal phases.
Thu Huong Ngo, Hong Van Bui, Van Ben Pham, Thi Hong Tran, An Bang Ngac, Nam Nhat Hoang   +5 more
openaire   +1 more source

Solubilization of Span 80 Niosomes by Sodium Dodecyl Sulfate

ACS Sustainable Chemistry & Engineering, 2016
The solubilization process of sorbitan monooleate (Span 80) niosomes, formed by sonication, by addition of the anionic surfactant sodium dodecyl sulfate (SDS) was studied in this work. The main parameters studied were the optical density at 350 nm wavelength, particle size distribution, ζ-potential, and the concentration of SDS monomers in the ...
Laura Alonso, Lara Roque, Isabel Escudero, José M. Benito, M. Teresa Sanz, Sagrario Beltrán   +5 more
openaire   +1 more source

Structure behaviors of hemoglobin in PEG 6000/Tween 80/Span 80/H2O niosome system

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007
Abstract The structure behaviors of Hemoglobin (Hb) are in detail studied by the methods of UV–vis and fluorescence spectra, circular dichroism, negative staining-TEM, FF-TEM and electrochemistry techniques in PEG 6000/Tween 80/Span 80/H2O niosome system.
Tianqing Liu, Rong Guo, Wei Hua, Jing Qiu   +3 more
openaire   +1 more source

W1/O/W2 and O1/W/O2 globules stabilized with Span 80 and Tween 80

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1997
Abstract The formation and stability of single water-in-oil-in-water (W 1 /O/W 2 ) and oil-in-water-in-oil (O 1 /W/O 2 ) globules were studied inside microcapillaries using video microscopy. Varying parameters included pH, salinity, as well as concentration of Tween 80 and Span 80 surfactants used to stabilize the globules were studied.
Wangqi Hou, Kyriakos D. Papadopoulos
openaire   +1 more source

Solvent effects on reverse micellisation of Tween 80 and Span 80 in pure and mixed organic solvents

Proceedings / Indian Academy of Sciences, 1997
Reverse micellisations of nonionic surfactants (Tween 80 and Span 80) in various pure nonaqueous solvents like carbontetrachloride, benzene, toluene, chloroform, cyclohexane and xylene, and in mixed solvent systems like CCl4-DMF and CCl4-DMSO covering the low dielectric range, are studied by UV electronic spectroscopy at 25°C.
J Santhanalakshmi, S I Maya
openaire   +1 more source

Influence of Ionic Surfactants on the Properties of Nanoemulsions Emulsified by Nonionic Surfactants Span 80/Tween 80

Journal of Dispersion Science and Technology, 2015
The instability of nanoemulsions were mainly due to Ostwald ripening. The droplet charge was influenced by the stability of nanoemulsions significantly. In this work, the properties of the shea butter oil-loaded nanoemulsions were investigated in detail with the addition of cationic surfactants (cetyl trimethyl ammonium chloride, 1631; octadecyl ...
Yonghong Tian, Lianghong Chen, Wanping Zhang   +2 more
openaire   +1 more source

Dynamic and Rheological Properties of Span 80 at Liquid–Liquid Interfaces

Journal of Dispersion Science and Technology, 2014
The adsorption characteristics of Span 80 at liquid/liquid interfaces were investigated. The equilibrium interfacial tension values were successfully fitted with a Langmuir isotherm resulting in the determination of a mean molecular area from 25 to 35 A2/mol.
M. Benmekhbi, S. Simon, J. Sjöblom
openaire   +1 more source

Determination of emulsion explosives with Span-80 as emulsifier by gas chromatography–mass spectrometry

Journal of Chromatography A, 2011
A novel approach for identification and determination of emulsion explosives with Span-80 (sorbitol mono-oleate) as the emulsifier and their postblast residues by gas chromatography-mass spectrometry (GC-MS) has been developed. 24 kinds of emulsion explosives collected have been processed by transesterification reaction with metholic KOH solution and ...
Fei-Fei, Tian, Jing, Yu, Jia-Hong, Hu, Yong, Zhang, Meng-Xia, Xie, Yuan, Liu, Xiang-Feng, Wang, Hai-Ling, Liu, Jie, Han   +8 more
openaire   +2 more sources

Temperature-Sensitive Nonionic Vesicles Prepared from Span 80 (Sorbitan Monooleate)

Langmuir, 2008
Different types of nonionic vesicles were prepared from commercial Span 80 (also called sorbitan monooleate), as an inexpensive, biocompatible alternative to conventional phospholipid-based vesicles (liposomes). The vesicles were characterized by different techniques and comparison was made with vesicles formed from POPC (1-palmitoyl-2-oleoyl- sn ...
Keiichi, Kato, Peter, Walde, Norio, Koine, Sosaku, Ichikawa, Takashi, Ishikawa, Ryo, Nagahama, Takehiko, Ishihara, Tetsuya, Tsujii, Masachika, Shudou, Yousuke, Omokawa, Takashi, Kuroiwa   +10 more
openaire   +2 more sources

Water-cyclohexane-“Span 80”-“Tween 80” systems: Solution properties and water/oil emulsion formation

Journal of Colloid and Interface Science, 1987
The solution properties of sorbitan monooleate (Span 80) and ethoxylated sorbitan monooleate (Tween 80) in cyclohexane are discussed. It is shown that aggregates of nominal “radius” ∼65 nm are formed in the former case at concentrations up to ∼0.5 mole dm−3. The aggregation behavior is very sensitive to the presence of water.
Robin Davies, David E Graham, Brian Vincent   +2 more
openaire   +1 more source