Results 21 to 30 of about 143,309 (301)

Effect of Surfactant HLB Value on Enzymatic Hydrolysis of Chitosan

ChemEngineering, 2022
Nonionic surfactants are reported as being able to enhance enzyme stability and increase the conversion of enzymatic reactions. Surfactant-assisted enzymatic hydrolysis conversion is affected by surfactant HLB values. This work investigated the influence
Nur Rokhati, Tutuk Djoko Kusworo, Aji Prasetyaningrum, Nur ‘Aini Hamada, Dani Puji Utomo, Teguh Riyanto   +5 more
doaj   +1 more source

Experimental and Theoretical Studies on the Self-assembled Nano-structure of Nonionic Surfactant/ionic Liquid Hybrid Systems

, 2023
The self-assembled structure of various Brij series nonionic surfactants (such as Brij-30, Brij-52, Brij-56, Brij-58, Brij-35, and Brij-700) hybridized with room-temperature ionic liquids (RTILs) was studied using small-angle X-ray scattering (SAXS ...
Harada Masafumi, Hua Er, 1000090314525, Zhu Jingjing, 原田 雅史, はらだ まさふみ   +5 more
core   +1 more source

Direct Potentiometric Study of Cationic and Nonionic Surfactants in Disinfectants and Personal Care Products by New Surfactant Sensor Based on 1,3-Dihexadecyl−1H-benzo[d]imidazol−3-ium

Molecules, 2021
A novel, simple, low-cost, and user-friendly potentiometric surfactant sensor based on the new 1,3-dihexadecyl−1H-benzo[d]imidazol−3-ium-tetraphenylborate (DHBI–TPB) ion-pair for the detection of cationic surfactants in personal care products and ...
Nikola Sakač, Dean Marković, Bojan Šarkanj, Dubravka Madunić-Čačić, Krunoslav Hajdek, Božo Smoljan, Marija Jozanović   +6 more
doaj   +1 more source

A STUDY ON THE SOLUBILITY AND STABILITY OF DIAZEPAM AND NITRAZEPAM IN BUFFERED MIXTURES [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 1983
Diazepam and Nitrazepam were solubilized by a series of commercial nonionic surfactant solutions buffered to pH 4, 6 and 7 at 35°C. These nonionic surfactants include Eumulgin C 1000 and C 1500 and Brij 35 and 58. It was found that the surfactant and the
A. Abdel-Zaher, M. Mesiha, A. Aboutaleb
doaj   +1 more source

Removal of chromium (III) by two-aqueous phases extraction [PDF]

, 2009
Two-aqueous phase extraction of chromium (III) as a solute from their aqueous solutions was investigated using polyethoxylated alcohols (CiEj) as a biodegradable non-ionic surfactant in the presence of anionic sodium dodecylbenzene sulfonate (SDBS ...
Nasr-Eddine, Belkhouche, Rim, Sekkal Amina, Canselier, Jean-Paul, Amine, Didi Mohamed   +3 more
core   +1 more source

Novel Nonylphenol Polyethoxylated Based Surfactants for Enhanced Oil Recovery for High-Mineralization Carbonate Reservoir

Energies, 2022
Surfactant flooding can mobilize trapped oil and change the wettability of the rock to be more hydrophilic, which increases the oil recovery factor. However, the selection of surfactants is difficult in the case of high salinity conditions. In this work,
Emil R. Saifullin, Polina O. Putintseva, Rustam N. Sagirov, Mikhail A. Varfolomeev, Chengdong Yuan, Roman S. Pavelyev, Sergey A. Nazarychev, Aleksei O. Malahov, Lucia Akimushkina, Dmitrii A. Zharkov, Alexey O. Bykov, Ulukbek Mirzakimov   +11 more
doaj   +1 more source

Toxicity of nonionic surfactants [PDF]

WIT Transactions on Ecology and the Environment, 2008
Nonionic surfactants are amphilic chemicals that enhance desorption and bioavailability by increasing solubility and dispersion of poorly soluble hydrocarbons and oils. This study was conducted to determine the toxicity of commercial nonionic surfactants by using the Microtox Acute Toxicity test which is a rapid, simple test for toxicity. The test uses
K. Jahan, S. Balzer, P. Mosto
openaire   +1 more source

Mixed adsorption and surface tension prediction of nonideal ternary surfactant systems [PDF]

, 2005
To deal with the mixed adsorption of nonideal ternary surfactant systems, the regular solution approximation for nonideal binary surfactant systems is extended and a pseudo-binary system treatment is also proposed.
Zhou, X.-Q., Cui, Z.-G., Canselier, Jean-Paul   +2 more
core   +1 more source

Biocatalytic activity of Monascus mycelia depending on physiology and high sensitivity to product concentration

AMB Express, 2017
Cell suspension culture using mycelia as whole cell biocatalyst for production of orange Monascus pigments has been carried out successfully in a nonionic surfactant micelle aqueous solution.
Fengling Lu, Yaolin Huang, Xuehong Zhang, Zhilong Wang   +3 more
doaj   +1 more source

The effect of alkaline–surfactant on the wettability, relative permeability and oil recovery of carbonate reservoir rock: experimental investigation

Journal of Petroleum Exploration and Production Technology, 2019
Due to the increasing demand and the price of hydrocarbon fuels, today, cost-effective enhanced recovery of oil and gas reservoirs has become one of the most interesting research topics. Since the Iranian reservoirs have a considerable potential to apply
Erfan Hosseini, Farzad Hajivand, Reza Tahmasebi   +2 more
doaj   +1 more source