Víctor Fernando Muñoz Estrada, Esmeralda Elizabeth Díaz Carrizales, Jatzibe Lizbeth González Castro, Juan Ramón Trejo Acuña,
Tópico(s): Dermatological and COVID-19 studies
2009 - Elsevier BV | Revista Iberoamericana de Micología
José Luis González-Zapata, Francisco Javier Enríquez‐Medrano, Ricardo López-González, Javier Revilla, Ricardo Mendoza Carrizales, Dimitrios Georgouvelas, Luis Valencia, Ramón Díaz de León,
In this work, we explore the statistical copolymerization of 1,3-butadiene with the terpenic monomers myrcene and farnesene, carried out via coordination polymerization using a neodymium-based ternary catalytic system. The resultant copolymers, poly(butadiene-co-myrcene) and poly(butadiene-co-farnesene), were synthesized at different monomer ratios, elucidating the influence of the bio-based monomer content over the kinetic variables, molecular and thermal properties, and the reactivity constants ( ...
Tópico(s): Plant-Derived Bioactive Compounds
2020 - Royal Society of Chemistry | RSC Advances
Luis Valencia, Francisco Javier Enríquez‐Medrano, Ricardo López-González, Rishab Handa, Hened Saade Caballero, Ricardo Mendoza Carrizales, José Luis Olivares‐Romero, Ramón Díaz de León,
Towards the development of eco-friendly alternatives of elastomeric materials, which can replace petroleum-based materials, it is crucial to explore different monomers and catalytic systems in order to find the best possible combinations for specific applications. Herein, we report the synthesis of polyocimene via coordination polymerization using two different neodymium-based catalysts (NdV3 and Nd(Oi-Pr)3), activated by alkylaluminums/organoboron compounds. By varying the type of co-catalyst species, ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2020 - Royal Society of Chemistry | RSC Advances
J. A. González-Calderón, David Contreras López, Javier Alejandro Balcázar Pérez, Adrián Austria Gutiérrez, Ricardo Mendoza‐Carrizales, Ramón Zárraga, Javier Vallejo‐Montesinos,
Tópico(s): Polymer composites and self-healing
2019 - Springer Science+Business Media | Silicon
Arely Bahena, Ilse Magaña, Ricardo López-González, Rishab Handa, Francisco Javier Enríquez‐Medrano, Sugam Kumar, Ricardo Mendoza Carrizales, Salvador Fernández, Luis Valencia, Ramón Díaz de León,
This article proposes a method to produce bio-elastomer nanocomposites, based on polyfarnesene or polymyrcene, reinforced with surface-modified graphene oxide (GO).
Tópico(s): Bone Tissue Engineering Materials
2020 - Royal Society of Chemistry | RSC Advances
Ramón Díaz de León, Francisco Javier Enríquez‐Medrano, Hortensia Maldonado Textle, Ricardo Mendoza Carrizales, Karina Reyes Acosta, Ricardo López-González, José Luis Olivares‐Romero, Luis Edmundo Lugo Uribe,
Abstract The monomer β ‐myrcene, a renewable resource, was polymerized in cyclohexane using two different Ziegler‐Natta catalyst systems based on neodymium Nd(O i‐ Pr) 3 and NdV 3 . The Nd(O i‐ Pr) 3 was combined with [HNMe 2 Ph][B(C 6 F 5 ) 4 ] (or [CPh 3 ][B(C 6 F 5 ) 4 ]) and Al( i ‐Bu) 3 (or Al( i ‐Bu) 2 H). Next, the NdV 3 was activated using Al( i ‐Bu) 3 and AlEt 2 Cl. Both catalyst systems exhibited high polymer yields near 100 % in the established reaction time, high polymer molecular masses, and broad molecular ...
Tópico(s): Synthesis and characterization of novel inorganic/organometallic compounds
2016 - Wiley | The Canadian Journal of Chemical Engineering
Luis Alexandro Valencia López, Francisco Javier Enríquez‐Medrano, Ricardo Mendoza Carrizales, Florentino Soriano‐Corral, Adalí Castañeda Facio, Ramón Díaz de León,
Organoboron compounds of nonionic and ionic nature, tris(pentafluorophenyl)borane, and N,N-dimethylanilinium tetra(pentafluorophenyl)borate were evaluated to act in conjunction with MAO as activators on ethylene polymerization by using the catalyst Cp 2 ZrCl 2 . A decrease on the catalytic activity was observed in both cases in relation with a reference polyethylene which was synthesized in absence of any organoboron compound. An increase on the crystallinity degree and molecular weight, as well as ...
Tópico(s): Synthetic Organic Chemistry Methods
2014 - Hindawi Publishing Corporation | International Journal of Polymer Science
Heriberto Rodríguez‐Tobías, Francisco Javier Enríquez‐Medrano, Myrna Salinas‐Hernández, Judith Cabello-Romero, Hortensia Maldonado‐Textle, Ricardo Mendoza‐Carrizales, José Díaz‐Elizondo, José Luis Olivares‐Romero, Ramón Díaz de León,
Abstract β‐Myrcene, a terpenic monomer, holds potential for developing sustainable polymer‐based materials with enhanced properties. This study examines the synthesis of a myrcene‐based monomer and its incorporation into unsaturated polyesters, focusing on polymerization, curing, and final properties. Unsaturated polyesters were synthesized with varying myrcene‐based monomer content (6, 12, and 24 mol%), phthalic anhydride, maleic anhydride, propylene glycol, ethylene glycol, and diethylene glycol. ...
Tópico(s): Polymer Nanocomposites and Properties
2024 - Wiley | Journal of Applied Polymer Science
Mariano García-Campa, Ramiro Flores-Ramírez, Sabrina Rojo-Garza, Edgar Francisco Carrizales‐Sepúlveda, Diego Regalado-Ceballos, Raúl Reyes-Araiza, Neri Alejandro Álvarez‐Villalobos, René Rodríguez‐Gutiérrez, José Ramón Azpiri-López,
Atorvastatin is widely recommended for long-term secondary prevention in STEMI patients with no contraindication. Although high-dose atorvastatin has been shown to reduce important patient outcomes such as MACE, there is still doubt that high-dose atorvastatin could have the same protective effect in patients undergoing PCI in the short and long term. We searched the following electronic databases: Scopus, Web of Science, MEDLINE, EMBASE, and Cochrane Central considering studies that enrolled adult ...
Tópico(s): Coronary Interventions and Diagnostics
2024 - Public Library of Science | PLoS ONE