Results 81 to 90 of about 655,106 (217)

Novel Electrochemical Treatment of Spent Caustic from the Hydrocarbon Industry Using Ti/BDD

open access: yesInternational Journal of Photoenergy, 2015
During the crude oil refining process, NaOH solutions are used to remove H2S, H2Saq, and sulfur compounds from different hydrocarbon streams. The residues obtained are called “spent caustics.” These residues can be mixed with those obtained in other ...
Alejandro Medel   +8 more
doaj   +1 more source

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

open access: yesMaterials Research Express, 2020
In the industry, sodium carbonate is used to prepare sodium silicate; however, this process generates great volumes of CO _2 . In this work, sodium hydroxide has been proposed to prepare sodium silicate using natural sand. Two experimental variables were
A L Lázaro   +3 more
doaj   +1 more source

Exploring natural sunscreens: UVB protection and antioxidant properties in gadusol‐rich fish roes extracts

open access: yesPhotochemistry and Photobiology, EarlyView.
Gadusol‐rich extracts provide effective UVB protection and antioxidant activity in HaCaT cells and C. elegans, highlighting their potential as natural photochemoprotective agents for pharmaceutical and cosmetic applications. It also demonstrates remarkable in vitro antioxidant capacity and thermal stability over time.
Rocío Isla Naveira   +9 more
wiley   +1 more source

Empowering Remote Living: Optimizing Hybrid Renewable Energy Systems in Mexico

open access: yesEng
The developing environmental consequences of excessive dependence on fossil fuels have pushed many countries to invest in clean and renewable energy sources.
Juan Carlos León Gómez   +4 more
doaj   +1 more source

Praxis Model for Technology Development: a participatory approach. [PDF]

open access: yesRev Esc Enferm USP, 2023
Salbego C, Nietsche EA.
europepmc   +1 more source

Changes induced by UV radiation in the presence of sodium benzoate in films formulated with polyvinyl alcohol and carboxymethyl cellulose [PDF]

open access: yes, 2015
This work was focused on: i) developing single and blend films based on carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVOH) studying their properties, ii) analyzing the interactions between CMC and PVOH and their modifications UV-induced in the ...
Giannuzzi, Leda   +3 more
core   +2 more sources

Photoprotective potential of gadusol against ultraviolet B radiation in melanocytes

open access: yesPhotochemistry and Photobiology, EarlyView.
Gadusol protects melanocytes from ultraviolet B (UVB)‐induced damage without cytotoxicity. Abstract The increasing incidence of skin cancer, including melanoma, combined with the need for ultraviolet (UV) filters that are safe for human health and marine ecosystems, is driving the search for new photoprotective agents.
Andressa Mai Matsumoto   +8 more
wiley   +1 more source

"Fala-M@no-COVID-19": technological development of a health navigation program for men during the pandemic. [PDF]

open access: yesRev Bras Enferm, 2023
Santos FSD   +7 more
europepmc   +1 more source

From Hierarchical Capitalism to Developmental Governance: The Emergence of Concerted Skills Formation in Middle‐Income Countries

open access: yesRegulation &Governance, EarlyView.
ABSTRACT Skills formation is a pressing issue for middle‐income countries given the pace of technological change. In Latin America, scholars point to the hierarchical type of capitalism and its segmentalist skills formation system as the main roadblocks to exiting the middle‐income trap.
Aldo Madariaga, Mariana Rangel‐Padilla
wiley   +1 more source

Identificación de las variables que influyen en el origen de los puntos de congestión de tráfico

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia
La identificación de las variables que generan puntos de congestión vehicular en las ciudades se ha revelado como una tarea extraordinariamente compleja, que implica actividades de caracterización, predicción y proyección de los puntos de congestión ...
Ernesto De la Cruz Nicolás   +4 more
doaj   +1 more source

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