Results 31 to 40 of about 7,348 (171)
Revista del Museo de Antropologia, 2020 El análisis tafonómico permite conocer el origen y las posibles causas de la preservación diferencial en restos óseos. Este conocimiento resulta de suma utilidad para abordar análisis bioarqueológicos, ya que proporciona información clave sobre los ...
M. C. Bottini +2 more
semanticscholar +1 more source
Revista UniVap, 2016 Neste trabalho será apresentada a caracterização microestrutural do aço inoxidável 17-4 PH martensítico destinado à indústria petroquímica. Este foi endurecido por precipitação, via tratamento térmico de solubilização.
Ane Caroline Celestino Silva +4 more
doaj +1 more source
Síntesis y caracterización estructural de hidrotalcitas de Cu-Zn-Al
Revista Colombiana de Química, 2016 Las hidrotalcitas pueden ser usadas en áreas como catálisis, medicina, química ambiental, entre otras. Dependiendo de los metales presentes, los sólidos derivados de la calcinación de hidrotalcitas también son usados debido a su carácter básico, efecto ...
Edgardo Meza Fuentes +2 more
doaj +1 more source
Mathematical Modelling of Acetaminophen Release in HPC/PAAm Hydrogel: Synthesis and Application
International Journal of Polymer Science, Volume 2019, Issue 1, 2019., 2019 Hydrogels are commonly used as Drug Delivery Systems (DDS) as patches due to its ability to store drug molecules within their structures. The release can be activated under certain stimuli, such as temperature and pH. In this paper, the mathematical modelling of acetaminophen release in hydroxypropyl cellulose with polyacrylamide (HPC/PAAm) is reported.
Abigail M. Díaz-Guerrero +6 more
wiley +1 more source
Chemical Engineering Journal Advances, 2023 Microplastics, which are small plastic particles, have become a growing environmental concern due to their prevalence in aquatic and terrestrial environments.
Fernanda Miranda Zoppas +5 more
doaj +1 more source
, 2020 En este trabajo se propone la utilización de herramientas provenientes de la tafonomía y la arqueotanatología para ampliar el conocimiento sobre las costumbres mortuorias y los procesos de formación de sitio a partir del análisis de restos óseos humanos.
M. C. Bottini +2 more
semanticscholar +1 more source
High‐Active Metallic‐Activated Carbon Catalysts for Selective Hydrogenation
International Journal of Chemical Engineering, Volume 2018, Issue 1, 2018., 2018 A series of low‐loaded metallic‐activated carbon catalysts were evaluated during the selective hydrogenation of a medium‐chain alkyne under mild conditions. The catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature‐programmed desorption (TPD), temperature‐programmed reduction (TPR), X‐ray diffraction ...
Nicolás Carrara +8 more
wiley +1 more source
La industria petroquímica [PDF]
, 2022 La industria petroquímica es un sector de I la industria química que utiliza derivados del petróleo y gas natural como materias primas. Esta definición es sumamente simple y no da lugar a confusiones, pero para ilustrar el campo que corresponde a este ...
Bourquin, Oscar R., Santiago, Miguel de
core
Mundo Fesc, 2020 propósito analizar desde la perspectiva teórica-conceptual la Gestión del Conocimiento (GC) como herramienta esencial para la consolidación del Capital Humano (CH) en la industria petroquímica moderna, basándose en los supuestos de importantes autores, y
José Isaías Salas-Hernández +1 more
semanticscholar +1 more source
International Journal of Chemical Engineering, Volume 2018, Issue 1, 2018., 2018 New catalysts of Pt, PtNi, PtCo, and NiCo supported on Al2O3 were developed for producing hydrogen by aqueous phase reforming (APR) of oxygenated hydrocarbons. The urea matrix combustion technique was used for loading the metal on the support in order to improve several aspects: increase both the metal‐support interaction and the metal dispersion and ...
Liza A. Dosso +3 more
wiley +1 more source