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Authors = Araceli Orozco-Figueroa ORCID = 0000-0003-2198-6705

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19 pages, 5084 KiB  
Article
4-Phenylcoumarin (4-PC) Glucoside from Exostema caribaeum as Corrosion Inhibitor in 3% NaCl Saturated with CO2 in AISI 1018 Steel: Experimental and Theoretical Study
by Araceli Espinoza-Vázquez, Francisco Javier Rodríguez-Gómez, Ignacio Alejandro Figueroa-Vargas, Araceli Pérez-Vásquez, Rachel Mata, Alan Miralrio, Ricardo Galván-Martínez, Miguel Castro and Ricardo Orozco-Cruz
Int. J. Mol. Sci. 2022, 23(6), 3130; https://doi.org/10.3390/ijms23063130 - 15 Mar 2022
Cited by 3 | Viewed by 2656
Abstract
The corrosion inhibition of 5-O-β-D-glucopyranosyl-7-methoxy-3′,4′-dihydroxy-4-phenylcoumarin (4-PC) in AISI 1018 steel immersed in 3% NaCl + CO2 was studied by electrochemical impedance spectroscopy (EIS). The results showed that, at just 10 ppm, 4-PC exerted protection against corrosion with ղ [...] Read more.
The corrosion inhibition of 5-O-β-D-glucopyranosyl-7-methoxy-3′,4′-dihydroxy-4-phenylcoumarin (4-PC) in AISI 1018 steel immersed in 3% NaCl + CO2 was studied by electrochemical impedance spectroscopy (EIS). The results showed that, at just 10 ppm, 4-PC exerted protection against corrosion with ղ = 90% and 97% at 100 rpm. At static conditions, the polarization curves indicated that, at 5 ppm, the inhibitor presented anodic behavior, while at 10 and 50 ppm, there was a cathodic-type inhibitor. The inhibitor adsorption was demonstrated to be chemisorption, according to the Langmuir isotherm for 100 and 500 rpm. By means of SEM–EDS, the corrosion inhibition was demonstrated, as well as the fact that the organic compound was effective for up to 72 h of immersion. At static conditions, dispersion-corrected density functional theory results reveal that the chemical bonds established by the phenyl group of 4-PC are responsible of the chemisorption on the steel surface. According with Fukui reactivity indices, the molecules adsorbed on the metal surface provide a protective cover against nucleophilic and electrophilic attacks, pointing to the corrosion inhibition properties of 4-PC. Full article
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35 pages, 4714 KiB  
Review
The Historical Trauma and Resilience of Individuals of Mexican Ancestry in the United States: A Scoping Literature Review and Emerging Conceptual Framework
by Araceli Orozco-Figueroa
Genealogy 2021, 5(2), 32; https://doi.org/10.3390/genealogy5020032 - 29 Mar 2021
Cited by 4 | Viewed by 19844
Abstract
Recently, Black, Indigenous, and other People of Color (BIPOC) have encountered an escalation in adverse social conditions and trauma events in the United States. For individuals of Mexican ancestry in the United States (IMA-US), these recent events represent the latest chapter in their [...] Read more.
Recently, Black, Indigenous, and other People of Color (BIPOC) have encountered an escalation in adverse social conditions and trauma events in the United States. For individuals of Mexican ancestry in the United States (IMA-US), these recent events represent the latest chapter in their history of adversity: a history that can help us understand their social and health disparities. This paper utilized a scoping review to provide a historical and interdisciplinary perspective on discussions of mental health and substance use disorders relevant to IMA-US. The scoping review process yielded 16 peer reviewed sources from various disciplines, published from 1998 through 2018. Major themes included historically traumatic events, inter-generational responses to historical trauma, and vehicles of transmission of trauma narratives. Recommendations for healing from historical and contemporary oppression are discussed. This review expands the clinical baseline knowledge relevant to the diagnosis, treatment, and prevention of contemporary traumatic exposures for IMA-US. Full article
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