Buscar
Mostrando ítems 241-250 de 542
Theoretical–Experimental Study of the Action of Trace Amounts of Formaldehyde, Propionaldehyde, and Butyraldehyde as Inhibitors of the Ziegler–Natta Catalyst and the Synthesis of an Ethylene–Propylene Copolymer
(2023-02-22)
The copolymer synthesis process can be affected by failures in the production process or by contaminating compounds such as ketones, thiols, and gases, among others. These impurities act as an inhibiting agent of the ...
Two-dimensional simulation of emptying manoeuvres in water pipelines with admitted air
(2023-05-09)
This study examines the impact of sub-atmospheric pressures in water pipelines during emptying manoeuvres with air admitted. Previous research has looked at this issue but has not studied it in detail. This research presents ...
Studies of Endocrine Disruptors: Nonylphenol and Isomers in Biological Models
(2023-04-14)
Abstract
Certain emerging pollutants are among the most widely used chemicals globally, causing widespread concern in relation to their use in products devoted to cleaniness and asepsis. Nonylphenol ethoxylate (NPEOn) is ...
The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
(2023-05-26)
Over the next 5 yr, the Dark Energy Spectroscopic Instrument (DESI) will use 10 spectrographs with 5000 fibers on the 4 m Mayall Telescope at Kitt Peak National Observatory to conduct the first Stage IV dark energy galaxy ...
Quantitatively relating cosmic rays intensities from solar activity parameters based on structural equation modeling
(2023-03-06)
Cosmic rays measured through neutron monitors on Earth’s surface have a strong correlation with the number of sunspots on the
solar photosphere. Other indices that affect the dynamics of the heliosphere and distortions ...
Cambios en el periodismo y su impacto en la autonomía profesional: evidencia del estudio The Worlds of Journalism en siete países de América LatinaA New Route of Valorization of Petrochemical Wastewater: Recovery of 1,3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)–1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (Cyanox 1790) and Its Subsequent Application in a PP Matrix to Improve Its Thermal Stability
(2023-02-21)
The various chemicals in industrial wastewater can be beneficial for improving its circularity.
If extraction methods are used to capture valuable components from the wastewater and then
recirculate them throughout the ...
A New Route of Valorization of Petrochemical Wastewater : Recovery of 1,3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)–1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (Cyanox 1790) and Its Subsequent Application in a PP Matrix to Improve Its Thermal Stability
(2023-02-21)
The various chemicals in industrial wastewater can be beneficial for improving its circularity. If extraction methods are used to capture valuable components from the wastewater and then recirculate them throughout the ...
Characterization of the Morphological and Chemical Profile of Different Families of Microplastics in Samples of Breathable Air
(2023-01-20)
Microplastic (MP) contamination has become a problem of great interest to the community at large. The detection of these particles in different ecosystems and foods has been the subject of study. However, the focus of these ...
Measuring material thickness variations through tri-aperture DSPI
(2023-06-15)
A configuration for the measurement of thickness changes in materials through one-shot digital speckle pattern interferometry (DSPI) was developed. The phase maps calculation was made by adding carrier fringes by the ...
A Framework for Water Security Data Gathering Strategies
(2022-09)
At the international level, the term “water security” (WS) has gained increasing attention in recent decades. At the operational level, WS is assessed using tools that define the concept using a variety of dimensions and ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.