Results 11 to 20 of about 284 (90)

Emulsões de petróleo bruto: efeito do conteúdo aquoso e da adição de sistemas auto-organizáveis com surfactante [PDF]

, 2021
Water-in-oil emulsions of crude oil can present high viscosity, requiring techniques to viabilize their exploration and flow. As an alternative, oil-in-water microemulsions can be added on petroleum emulsions.
Ayupe de Souza Mendonça, Ricardo, Castro Freitas Prado, Carolina, de Castro Santana, Rejane   +2 more
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Hair surface interactions against different chemical functional groups as a function of environment and hair condition

International Journal of Cosmetic Science, Volume 45, Issue 2, Page 224-235, April 2023., 2023
Abstract Objective The nature and magnitude of molecular interactions on hair surfaces underpin the design of formulated products, of which the application involves a competitive adsorption process between cationic surfactants, fatty alcohols and surface actives such as silicone.
Leslie Labarre, Ophélie Squillace, Yu Liu, Peter J. Fryer, Preeti Kaur, Shane Whitaker, Jennifer M. Marsh, Zhenyu J. Zhang   +7 more
wiley   +1 more source

Highlighting the efficiency of ultrasound‐based emulsifier‐free emulsions to penetrate reconstructed human skin

International Journal of Cosmetic Science, Volume 44, Issue 2, Page 262-270, April 2022., 2022
Abstract Objective The cosmetic industry endeavours to strengthen the greener and safer claims of processes to respond to the high demand from customers for natural and environmentally friendly products. High‐frequency ultrasonication technology (HFUT) is a physical process enabling the stabilization of emulsions without requiring additional ...
Hichem Kichou, Yuri Dancik, Christophe Eklouh‐Molinier, Nicolas Huang, Martin Soucé, Laurianne Gressin, Guillaume Gillet, Igor Chourpa, Emilie Munnier, Franck Bonnier   +9 more
wiley   +1 more source

Roundup causes high levels of mortality following contact exposure in bumble bees

Journal of Applied Ecology, Volume 58, Issue 6, Page 1167-1176, June 2021., 2021
Surfactants, or other co‐formulants, in herbicides and other pesticides may contribute to global bee declines. We recommend that, as a precautionary measure until co‐formulant identities are made public, label guidelines for all pesticides be altered to explicitly prohibit application to plants when bees are likely to be foraging on them.
Edward A. Straw, Edward N. Carpentier, Mark J. F. Brown   +2 more
wiley   +1 more source

Techniques for Steamflooding improvement [PDF]

, 2022
One of the main challenges in developing a process of continuous steam injection is to control the injection profile. Said profile is strongly affected by steam channeling to “thief zones” and the gravitational effect of override, both are characterized ...
Ariza Tarazona, Maria Camila, Muñoz Martínez, Samuel Fernando, Pérez Venera, Alberto M., Rodríguez Castelblanco, Astrid Xiomara   +3 more
core   +2 more sources

Physical chemical properties and kinetics of redox processes in water/soybean oil microemulsions [PDF]

, 2008
Water/oil microemulsions (w/o ME) constituted by water, soybean oil, SDS (sodium dodecyl sulfate) and several short-chain alcohols were characterized from the viewpoint of its physical-chemical and electroanalytical properties.
Carla R. B. Mendonça, Clara I. D. Bica, Clarisse M. S. Piatnicki, Ernesto F. Simó-Alfonso, Guillermo Ramis-Ramos   +4 more
core   +1 more source

Automated system to acquire fluorescence, polarization and anisotropy maps within liquid flows

Journal of Analytical Methods in Chemistry, Volume 24, Issue 2, Page 31-39, 2002., 2002
Maps of polarization and anisotropy can be helpful for flow analysis systems (FIA, CFA, etc.) with reactions dependent on the intermolecular alignment as well as for dispersion control. Maps can be acquired manually, but when a scan over a sample area is required, the acquisition becomes tiresome and has low precision.
Cristina M. Quintella, Cristiane C. Gonçalves, Iuri Pepe, Angelo M. V. Lima, Ana Paula S. Musse   +4 more
wiley   +1 more source

Estudio comparativo de las propiedades magnéticas de ferritas hexagonales de Bario obtenidas por los métodos de coprecipitación y microemulsión [PDF]

, 1999
Por el m todo de coprecipitaci n qu mica se obtuvo un precursor formado por hidr xidos y carbonatos de hierro y bario que al calcinarlo a temperaturas superiores a 730oC se transforma en ferrita de bario.
García-Casillas, P. E., Matutes-Aquino, J. A.   +1 more
core   +3 more sources

Desarrollo y evaluación de un sistema autoemulsionable de Etoricoxib [PDF]

, 2020
La solubilidad acuosa limitada de algunos fármacos ha llevado a buscar alternativas como lo son los Sistemas autoemulsionables de entrega de Fármacos (SEDDS, por sus siglas en inglés), que aumentan la solubilidad y permeabilidad gastrointestinal de los ...
Bernad Bernad, María Josefa, Miranda Calderón, Jorge Esteban, Monroy Barreto, Minerva, Rojas González, Lucia, Santiago Villarreal, Oscar   +4 more
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Surfactant Enhanced Oil Recovery with Ionic Liquids: Laboratory tests [PDF]

, 2020
El petróleo es la base de nuestra actual comodidad. El objetivo principal de esta tesis es el desarrollo de nuevas formulaciones, basadas en líquidos iónicos, para su uso en la recuperación mejorada del petróleo. A tal fin, se estudió el comportamiento
Corchero Morais, Raquel
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