Results 31 to 40 of about 38,503 (283)

An experimental study of the physical mechanisms of fluid flow in tight carbonate core samples by binary surfactants

Heliyon
Binary surfactants present a promising approach to modifying the petrophysical mechanisms of rock formations to enhance fluid flow, particularly in challenging environments like carbonate rocks.
Ayomikun Bello, Anastasia Ivanova, Alexander Rodionov, Tagir Karamov, Andrey Morkovkin, Alexey Cheremisin   +5 more
doaj   +1 more source

The influence of surfactant structure on the dyeing of polyamide knitting with acid dyes [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2018
The influence of nonionic and anionic surfactants on the dyeing kinetics of polyamide 6 knitting was studied in this work. The influence of surfactants on the dyeing process is presented by determining the kinetic and thermodynamic parameters of dyeing ...
Ristić Nebojša N., Dodić Ivica R., Ristić Ivanka P.   +2 more
doaj   +1 more source

Photodegradation of nimodipine and felodipine in microheterogeneous systems [PDF]

, 2012
Indexación: Web of Science; ScieloThe photochemical behavior of nimodipine (NIMO) and felodipine (FELO), photolabile drugs widely used as antihypertensive calcium channel blockers, is studied in constrained media.
Brito, Julio, García, Cristóbal, Günther, Germán, Morales, Javier, Núñez-Vergara, Luis J., Pizarro, Nancy, Pozo, Andrés   +6 more
core   +1 more source

Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture

Safety and Health at Work, 2017
Background: Surfactant-containing water sprays are commonly used in coal mines to collect dust. This study investigates the dust collection performance of different surfactant types for a range of coal dust particle sizes and charges. Methods: Bituminous
Mei W. Tessum, Peter C. Raynor
doaj   +1 more source

Study on the effect of NMR-based surfactants on pore wetting of high-order coal

Meitan kexue jishu, 2023
High-order coal has the characteristics of weak water absorption due to the development of micropores. From the perspective of micropores, it is of great significance to study the improvement effect of different types of surfactants on the wettability of
Ming YANG, Tao ZHANG, Xuebo ZHANG, Jing XU, Longxiang HAN, Ji MA   +5 more
doaj   +1 more source

Theoretical description of mixed film formation at the air/water interface : carboxylic acids–fatty amines

, 2020
Thermodynamic parameters of mixed monolayer formation of aliphatic amines CnH2n+1NH2 and carboxylic acids CnH2n+1COOH (n = 6–16) are calculated using the quantum chemical semiempirical PM3 method.
Fainerman, V., Kartashynska, E., Vollhardt, D., Vysotsky, Y., Zakharov, A.   +4 more
core   +1 more source

Study to improve an amphoteric sulfonate alkyl ester surfactant by mixing with nonionic surfactant to reduce brine–waxy oil interfacial tension and to increase oil recovery in sandstone reservoir: T-KS field, Indonesia

Journal of Petroleum Exploration and Production Technology, 2018
Crude oil with a high wax content and high pour point can be very challenging when enhanced oil recovery by surfactant flooding is to be applied. High wax content in crude oil will lead to high intermolecular interaction because of the increasing ...
Taufan Marhaendrajana, Rani Kurnia, Dimas Irfana, Doddy Abdassah, Deana Wahyuningrum   +4 more
doaj   +1 more source

Effects of nanoparticle composite surfactants on the adsorption/desorption and diffusion of CH4 in coal

Meitan xuebao, 2023
A solid (coal) - gas (CH4) - liquid (surfactant) three-phase interaction system model is established based on the Grand Canonical Monte Carlo (GCMC) and Molecular Dynamics (MD) methods.
Yu SHI, Meng YANG, Shugang LI, Junhua XUE, Pengxiang ZHAO, Yuhua MA   +5 more
doaj   +1 more source

A Normalized HLD (HLD_N) Tool for Optimal Salt-Concentration Prediction of Microemulsions

Applied Sciences, 2021
Optimal condition-based microemulsion is key to achieving great efficiency in oil removal. One useful empirical equation to predict an optimal condition is a hydrophilic–lipophilic deviation (HLD).
Virin Kittithammavong, Ampira Charoensaeng, Sutha Khaodhiar   +2 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source