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Eric M. Rivera‐Muñoz

Universidad Nacional Autónoma de México

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R. Huirache–Acuña

Universidad Michoacana de San Nicolás de Hidalgo

Rodrigo Velázquez-Castillo

Autonomous University of Queretaro

R. Nava

Autonomous University of Queretaro

B. Pawelec

Instituto de Catálisis y Petroleoquímica

Alejandro Manzano-Ramírez

Center for Research and Advanced Studies of the National Polytechnic Institute

C. Peza-Ledesma

Universidad Nacional Autónoma de México

Beatriz M. Millán‐Malo

Universidad Nacional Autónoma de México

G. Alonso‐Núñez

Universidad Nacional Autónoma de México

Néstor Méndez‐Lozano

Universidad del Valle de México

Mario E. Rodríguez‐García

Universidad Nacional Autónoma de México

Cooperative Institutions

Universidad Nacional Autónoma de México

Autonomous University of Queretaro

Center for Research and Advanced Studies of the National Polytechnic Institute

Instituto Politécnico Nacional

Universidad Michoacana de San Nicolás de Hidalgo

Centro de Investigación en Materiales Avanzados

Instituto Tecnológico de Querétaro

Consejo Nacional de Humanidades, Ciencias y Tecnologías

Universidad Autónoma Metropolitana

Polytechnic University of Queretaro

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Silver nanostructure dependence on the stirring-time in a high-yield polyol synthesis using a short-chain PVP

Materials Letters (2014)

Alí Gómez-Acosta Alejandro Manzano-Ramírez Edgar J. López‐Naranjo L.M. Apátiga R. Herrera‐Basurto

Silver nitrate

10.1016/j.matlet.2014.09.109

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Citations (19)

A Comparison of Mechanical Properties of Different Hydroxyapatite (HAp) Based Nanocomposites: The Influence of Morphology and Preferential Orientation

Journal of Nanoscience and Nanotechnology (2019)

José Rafael Alanís-Gómez Eric M. Rivera‐Muñoz C. Peza-Ledesma Alejandro Manzano-Ramírez Rodrigo Velázquez-Castillo

Three different types of hydroxyapatite (HAp) based porous ceramic materials were obtained through the modified gel casting method; one of them was made of commercial HAp particles and used as a reference in the mechanical characterization. Other type of ceramic was elaborated using HAp nanofibers, which were synthesized through the microwave assisted hydrothermal method and they possess a high crystallinity, purity and a preferential crystalline orientation in the [300], such were grown along the [001]. The third type of porous ceramic was elaborated using a combination of HAp nanofibers and particles. The HAp nanofibers and particles were previously analyzed by using X-ray diffraction to study their crystal structure, the topology and morphology of those HAp aggregates were observed with scanning electron microscopy (SEM); high-resolution transmission electron microscopy was useful to carry out a detailed crystallographic analysis. Afterwards, an organic phase made of gelatin was added to the porous ceramics in order to obtain nanocomposite materials. Two different concentrations of gelatin were used separately, and the combination of three types of porous ceramics and two concentrations of gelatin produced six different nanocomposite materials. All of these composite materials were observed through the SEM to see their topology and porosity and after that, they were probed under compression tests and their corresponding mechanical behavior was analyzed. All the composites showed mechanical properties similar to those observed in cellular materials. The Young modulus and ultimate strength were compared, finally, it was determined the contribution to the mechanical properties of the morphology, crystalline quality and preferential crystalline orientation in the HAp nanofibers. According to such properties, the composite material made of HAp nanofibers has bone tissue implant potential applications.

Gelatin

Tetragonal crystal system

10.1166/jnn.2020.17171

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Comparative Study between Two Simple Synthesis Methods for Obtaining Green Gold Nanoparticles Decorating Silica Particles with Antibacterial Activity

Materials (2022)

Karen M. Soto Angelica Gódinez-Oviedo J. Mauricio López-Romero Eric M. Rivera‐Muñoz Edgar J. López‐Naranjo

The SiO2 particles system is one of the most common ways to protect colloidal metal systems, such as gold nanoparticles, from aggregation and activity loss due to their high chemical stability and low reactivity. In this study, silica green gold nanoparticles (AuNPs synthesized with mullein extract) were fabricated using two different sol-gel methods. The nanoparticles were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Fourier Transformed Infrared (FTIR), and the antibacterial activity against pathogens (Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Salmonella enterica). Synthesis-1 nanoparticles had a kidney-shaped form and uniform distribution, while synthesis-2 nanoparticles had a spherical and non-uniform form. Characterization showed that temperature is an important factor in the distribution of AuNPs in silica; a decrease allowed the formation of Janus-type, and an increase showed a higher concentration of gold in energy-dispersive spectroscopy (EDS) analysis. Overall, similar bands of the two synthesis silica nanoparticles were observed in FTIR, while XRD spectra showed differences in the preferential growth in AuNPs depending on the synthesis. Higher antibacterial activity was observed against S. aureus, which was followed by L. monocytogenes. No differences were observed in the antibacterial activity between the two different sol-gel methods.

10.3390/ma15217635

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Citations (3)

SBA-15 Mesoporous Silica as Catalytic Support for Hydrodesulfurization Catalysts—Review

Materials (2013)

R. Huirache–Acuña R. Nava C. Peza-Ledesma Javier Lara‐Romero Gabriel Alonso-Núez

SBA-15 is an interesting mesoporous silica material having highly ordered nanopores and a large surface area, which is widely employed as catalyst supports, absorbents, drug delivery materials, etc. Since it has a lack of functionality, heteroatoms and organic functional groups have been incorporated by direct or post-synthesis methods in order to modify their functionality. The aim of this article is to review the state-of-the-art related to the use of SBA-15-based mesoporous systems as supports for hydrodesulfurization (HDS) catalysts.

Heteroatom

Mesoporous organosilica

10.3390/ma6094139

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Citations (189)

Automatic volumetric gas flow meter for monitoring biogas production from laboratory-scale anaerobic digester

Sensors and Actuators B Chemical (2010)

R.O. Cadena Pereda Eric M. Rivera‐Muñoz G. Herrera Ruiz

Positive displacement meter

Biogas

10.1016/j.snb.2010.03.053

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Gold Nanoparticles Synthesized with Common Mullein (Verbascum thapsus) and Castor Bean (Ricinus communis) Ethanolic Extracts Displayed Antiproliferative Effects and Induced Caspase 3 Activity in Human HT29 and SW480 Cancer Cells

Pharmaceutics (2022)

Karen M. Soto Iván Luzardo‐Ocampo J. Mauricio López-Romero Sandra Mendoza Guadalupe Loarca‐Piña

Gold nanoparticles (AuNPs) are promising nanomaterials exhibiting anti-cancer effects. Green AuNPs synthesis using plant extracts can be used to achieve stable and beneficial nanoparticles due to their content of bioactive compounds. This research aimed to synthesize and evaluate the antiproliferative and caspase-3 activity induction of green AuNPs synthesized with common mullein (V. thapsus) flowers (AuNPsME) and castor bean (R. communis) leaves (AuNPsCE) ethanolic extracts in human HT29 and SW480 colorectal cancer cells. Their effect was compared with chemically synthesized AuNPs (AuNPsCS). The extracts mainly contained p-coumaric acid (71.88-79.93 µg/g), ferulic acid (19.07-310.71 µg/g), and rutin (8.14-13.31 µg/g). The obtained nanoparticles presented typical FT-IR bands confirming the inclusion of polyphenols from V. thapsus and R. communis and spherical/quasi-spherical morphologies with diameters in the 20.06-37.14 nm range. The nanoparticles (20-200 µg/mL) showed antiproliferative effects in both cell lines, with AuNPsCE being the most potent (IC50 HT29: 110.10 and IC50SW480: 64.57 µg/mL). The AuNPsCS showed the lowest intracellular reactive oxygen species (ROS) generation in SW480 cells. All treatments induced caspase 3/7 activity to a similar or greater extent than 30 mM H2O2-treated cells. Results indicated the suitability of V. thapsus and R. communis extracts to synthesize AuNPs, displaying a stronger antiproliferative effect than AuNPsCS.

10.3390/pharmaceutics14102069

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Citations (24)

Physical and Structural Characterization of Bis-Acryl Composite Resin

Research Square (Research Square) (2023)

Wendy E. Rodríguez Guardado Eric M. Rivera‐Muñoz Janeth Serrano Bello Marco Antonio Álvarez-Pérez Ruben A. Domínguez Pérez

Abstract Objective To determine if the chemical and structural characteristics could cause to increase the fracture resistance using four bis-acryl resins Luxatemp, Protemp, Structur and Telio. Materials and Methods Three-points bending by Flexural test, SEM, and FTIR were carried out to compare the Kruskal-Wallis test. Results The Kruskal-Wallis test indicated a significant difference in the materials (< 0.0001) that showed higher flexural strength found in Luxatemp, while comparing all bis-acryl resins by Dunn's multiple comparison test indicate that there was no significant difference between Luxatemp VS Structur, and Protemp VS Telio. SEM analysis showed that different sizes of filler particles were observed in all samples, which causes them to present irregular surfaces. By FTIR, typical C = O and CH 2 groups were observed corresponding to methyl methacrylate and methylene groups respectively, and different bands located at 1460 − 1350 cm − 1 assigned to pigment materials, stabilizers, and filler particles. In conclusion, a long cross-linkage polymer chain, and the presence of CO 3 , SiO 2 and N-H groups as a fillers particle interacting with OH groups could be the cause of our results. Conclusion It is necessary a longer storage under a different condition that would emulate the oral environment and allow us to determine changes in the chemical compounds as well as changes in ultrastructural characteristics related to mechanical properties to identify their correct clinical use. Clinical Relevance During the preparation of fixed prosthesis (including individual bridges and crowns) it is important to select the materials that have the best features and properties to predict a successful clinical treatment.

Filler (materials)

Polymethyl methacrylate

10.21203/rs.3.rs-3677710/v1

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Citations (0)

Self-Cleaning Activity on Concrete Surfaces Coated with Fe- and S-Doped TiO₂ Synthesized by Sol–Gel Microwave Method

Journal of Nanoscience and Nanotechnology (2017)

A. Zamudio-Méndez E Sánchez-Palma R Navarro-López Miguel A. Pérez-Lara Eric M. Rivera‐Muñoz

10.1166/jnn.2017.13834

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Citations (1)

Growth of hydroxyapatite on silica gels in the presence of organic additives: kinetics and mechanism

Materials Research Innovations (2001)

Eric M. Rivera‐Muñoz Witold Brostow R. Rodrı́guez V. M. Castaño

Synthetic hydroxyapatite was grown on surfaces of silica gels by immersing silica monoliths in a simulated body fluid at 37 °C. The gels were prepared by the sol-gel method and the drying process was controlled by using different additives (mono- and di-ethylene glycol, formamide and glycerin) to obtain large monoliths. The additives affect the growth of the apatite by changing the kinetic constants of chemical reactions on the silica surface. Surface areas and pore size distributions were determined, energy dispersion and FTIR spectra obtained, and scanning electron microscopy performed. The formation of the hydroxyapatite competes with the formation of crystalline calcium carbonate, but the results allow optimization of conditions for the growth of the former as a function of the type and concentration of the additive. For these optimal conditions, the mechanism and the order of the reaction were determined.

10.1007/s100190000100

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Citations (19)

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Journal of Electrochemical Science and Technology (2017)

J. Porcayo-Calderón Eric M. Rivera‐Muñoz C. Peza-Ledesma M. Casales-Díaz L.M. Martínez de la Escalera

Palm oil production is among the highest worldwide, and it has been mainly used in the food industry and other commodities. Currently, a lot of palm oil production has been destined for the synthesis of biodiesel; however, its use in applications other than the food industry has been questioned. Thereby for a sustainable development, in this paper the use of palm oil of low quality for corrosion inhibitors synthesis is proposed. The performance of the synthesized inhibitors was evaluated by using electrochemical techniques such as open circuit potential measurements, linear polarization resistance and electrochemical impedance spectroscopy. The results indicate that the fatty amides from palm oil are excellent corrosion inhibitors with protection efficiencies greater than 98%. Fatty amides molecules act as cathodic inhibitors decreasing the anodic dissolution of iron. When fatty amides are added, a rapid decrease in the corrosion rate occurs due to the rapid formation of a molecular film onto carbon steel surface. During the adsorption process of the inhibitor a self-organization of the hydrocarbon chains takes place forming a tightly packed hydrophobic film. These results demonstrate that the use of palm oil for the production of green inhibitors promises to be an excellent alternative for a sustainable use of the palm oil production. Keywords: Palm oil, Sustainable development, Corrosion inhibitor, Fatty amides, Electrochemical techniques

Corrosion inhibitor

10.33961/jecst.2017.8.2.133

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Citations (28)

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