Results 41 to 50 of about 4,416 (264)

Chemical dispersants and quantification textural fractions by Bouyoucos and pipette methods

Acta Agronómica, 2015
An adequate individualization of particles is required for a correct granulometric analysis in order to quantify the real percent composition of particles in the soil. The aim of this study was to compare the percent of granulometric fractions determined
Katerine Borja Martínez, Jaime Mercado Lázaro, Enrique Miguel Combatt Caballero   +2 more
doaj   +1 more source

Exploration of marine bacterioplankton community assembly mechanisms during chemical dispersant and surfactant‐assisted oil biodegradation

Ecology and Evolution, 2021
Assembly processes in marine microbial communities amended with crude oil and chemical dispersant are poorly understood and even more so when biosurfactants are used.
Christina Nikolova, Umer Zeeshan Ijaz, Tony Gutierrez   +2 more
doaj   +1 more source

Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization

Advanced Functional Materials, EarlyView.
We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat, Alexander Peraire‐Bueno, A. John Hart, Randall M. Erb   +3 more
wiley   +1 more source

Facile Strategy for Mass Production of Pt Catalysts for Polymer Electrolyte Membrane Fuel Cells Using Low-Energy Electron Beam

Nanomaterials, 2020
There are so many variables affecting the large-scale chemical synthesis of nanoparticles that mass production remains a challenge. Here, using a high-efficiency compact electron beam generator irradiating a low-energy electron beam, we fabricate carbon ...
Jongmin Shin, Jiho Min, Youngjin Kim, Jin Hee Lee, Geunseok Chai, Namgee Jung   +5 more
doaj   +1 more source

Bacteria‐Responsive Nanostructured Drug Delivery Systems for Targeted Antimicrobial Therapy

Advanced Materials, EarlyView.
Bacteria‐responsive nanocarriers are designed to release antimicrobials only in the presence of infection‐specific cues. This selective activation ensures drug release precisely at the site of infection, avoiding premature or indiscriminate release, and enhancing efficacy.
Guillermo Landa, Gracia Mendoza, Silvia Irusta, Manuel Arruebo   +3 more
wiley   +1 more source

Characterization of the Chemical Composition of Polyisobutylene-Based Oil-Soluble Dispersants by Fluorescence

, 2016
A novel methodology based on fluorescence quenching measurements is introduced to determine quantitatively the amine content of polyisobutylene succinimide (PIBSI) dispersants used as engine oil-additives.
Jean Duhamel (1390867), Solmaz Pirouz (1529323), Yulin Wang (213752), J. Michael Chong (1529326)   +3 more
core   +1 more source

Chemical and biological dispersants differently affect the bacterial communities of uncontaminated and oil-contaminated marine water [PDF]

, 2020
The use of dispersants in marine environments is a common practice worldwide for oil spill remediation. While the effects of chemical dispersants have been extensively studied, those of biosurfactants, mainly surfactin that is considered one of the most ...
van Elsas, Jan Dirk, de Almeida Couto, Camila Rattes, Jurelevicius, Diogo, Seldin, Lucy, de Assis Leite, Deborah Catharine   +4 more
core   +1 more source

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Chemical Dispersant Enhances Microbial Exopolymer (EPS) Production and Formation of Marine Oil/Dispersant Snow in Surface Waters of the Subarctic Northeast Atlantic

Frontiers in Microbiology, 2019
A notable feature of the Deepwater Horizon oil spill was the unprecedented formation of marine oil snow (MOS) that was observed in large quantities floating on the sea surface and that subsequently sedimented to the seafloor.
Laura Duran Suja, Xindi Chen, Xindi Chen, Stephen Summers, David M. Paterson, Tony Gutierrez   +5 more
doaj   +1 more source

A tradeoff between physical encounters and consumption determines an optimal droplet size for microbial degradation of dispersed oil

Scientific Reports, 2022
Immiscible hydrocarbons occur in the ocean water column as droplets of varying diameters. Although microbial oil degradation is a central process in the remediation of hydrocarbon pollution in marine environments, the relationship between droplet size ...
Vicente I. Fernandez, Roman Stocker, Gabriel Juarez   +2 more
doaj   +1 more source