Rene Leal - Academia.edu (original) (raw)

Papers by Rene Leal

Journal of Materials Chemistry, 2008

... Eduardo Pérez-Cappe, Yodalgis Mosqueda, Ricardo Martínez, Carlos Ricardo Milian, Orlando Sánc... more ... Eduardo Pérez-Cappe, Yodalgis Mosqueda, Ricardo Martínez, Carlos Ricardo Milian, Orlando Sánchez, José A. Varela, Alejandra Hortencia, Eder Souza, Pilar Aranda and Eduardo Ruiz-Hitzky J. Mater. Chem., 2008, 18, 3965-3971. DOI: 10.1039/B803874K, Paper. ...

Psychology Learning & Teaching, 2012

Psychologists are typically obliged to learn about the cultures of their minority clients and stu... more Psychologists are typically obliged to learn about the cultures of their minority clients and students before working with them, refining their specific cultural knowledge and deepening their understanding of the influence of cultural factors on their clients and students through direct interaction. Likewise, professors of psychology can utilize these principles to empower minority students by (a) modeling cultural openness, (b) acknowledging students' rich cultural knowledge and experiences, (c) tailoring assignments to minority students' culturally influenced learning needs, and (d) seizing teachable moments. Empowering minority students in such a collaborative learning environment allows the burden of incorporating cultural views to shift from minority students to the larger classroom community, in which cultural dynamics may be safely explored, respected, and valued.

This working paper considers the present situation of COVID–19 in Chile, with a focus on changing... more This working paper considers the present situation of COVID–19 in Chile, with a focus on changing immigration trends, as well as the polarization of political and social conflict caused by the ways in which the Chilean government has attempted to manage the COVID–19 pandemic. The paper concentrates on the enactment of a restrictive immigration law and its consequences for Chilean society, and argues that the government's COVID-19 policies have led to greater capital accumulation for the wealthy, exacerbated existing social divisions.

Journal of Pharmaceutical and Biomedical Analysis, 2020

While the role of plasma renin activity (PRA) in heart failure has been widely studied in adults,... more While the role of plasma renin activity (PRA) in heart failure has been widely studied in adults, comprehensive data on pediatric heart failure remain lacking. This drawback is increasingly being addressed by academic research. Nevertheless, such pediatric investigations are commonly conducted only once due to ethical constraints. Therefore, the quality of bioanalytical data must be ensured to acquire meaningful insights into maturing humoral parameters. However, appropriate post-validation assessment of bioanalytical runs is currently underrepresented by regulatory guidance. Thus, for applications in an academic environment, an easy-to-handle six-step bioanalytical quality control system was designed based on regulatory guidelines (e.g. U.S. Food and Drug Administration) combined with international recommendations (e.g. Clinical and Laboratory Standards Institute) and current scientific discussion. Its applicability to an enzyme-linked immunosorbent assay for determination of PRA was investigated within three pediatric trials of the EU-funded "Labeling of Enalapril in Neonates up to Adolescents" project. This quality control system identified 15 % bioanalytical runs as non-compliant to the predefined specifications and ensured the reliable quantification of 940 pharmacodynamic samples. The inter-run assessment of quality controls was able to demonstrate the comparability of the study results. Furthermore, 86 % of incurred sample reanalysis pairs complied with regulatory requirements (>67 %), thus underlining the long-term reproducibility of the utilized ligand-binding assay. Successful participation in interlaboratory testing confirmed the accuracy of the applied method throughout the entire study period. Further investigations showed no notable differences between the five applied lots of the PRA assay. The applicability of this quality control system was proven in an academic environment and ensured reliable results for PRA over the entire 24-month study period.

PANI–LiNi0.8Co0.2O2 nanocomposite material with improved properties as positive electrode was pre... more PANI–LiNi0.8Co0.2O2 nanocomposite material with improved properties as positive electrode was prepared by a new synthesis method. In a first step, LiNi0.8Co0.2O2 mixed oxide in the form of a fine powder was dispersed in aniline and this suspension was sprayed on the surface of an aqueous solution of HCl and ammonium peroxodisulfate. The resulting PANI–LiNi0.8Co0.2O2 nanocomposite is spontaneously formed by polymerization of the aniline molecules present in the drops together with small particles of the oxide. This method induces the formation of nanocomposites showing a better distribution of the oxide particles in the polymer matrix than that observed in related PANI–LiNi0.8Co0.2O2 microcomposites prepared under ultrasound irradiation to disperse the oxide particles during PANI polymerization. Measurements of electrical conductivity and zeta potential, as well as structural characterization of PANI–LiNi0.8Co0.2O2 nanocomposites, reveal the existence of relatively strong interactions between the conducting polymer and the oxide particles. This feature determines higher values of the electrical conductivity (0.5 S cm−1) and of the average operative voltage (3.6 V), as well as of other technological parameters of the nanocomposite when it is used as the positive electrode of rechargeable lithium batteries, in comparison to those of the related microcomposite materials already reported.

Social Sciences

This essay examines the contemporary crisis in Chile in the context of the rise of the global far... more This essay examines the contemporary crisis in Chile in the context of the rise of the global far right. What led to the popular uprising in Chile in October 2019, and what forces are represented by its violent state repression? Fascist formations are currently developing in various nations; Umberto Eco’s concept of Ur-Fascism is useful in tracing the range of fascisms and their characteristics. These include populism, nationalism, racism, and syncretic traditionalism. In Chile, the racism of the far right is directed against its indigenous people more than immigrants. The ‘unfinished business’ of capitalist development here is the historical background of the oppressive relationship established by the ‘West’ over the ‘Rest’, in Stuart Hall’s terms. Fascism emerges periodically, temporarily resolving crises of accumulation through runaway activity of capital, entailing suppression of the working class and its organization. Neoliberalism has been the latest form of this exacerbation,...

Bulletin of the Korean Mathematical Society

In this paper we prove Ekeland's variational principle in the setting of locally complete spa... more In this paper we prove Ekeland's variational principle in the setting of locally complete spaces for lower semi continuous functions from above and bounded below. We use this theorem to prove Caristi's fixed point theorem in the same setting and also for lower semi continuous functions.

Salud pública de México, 1990

1990 Myriam Cardozo Brum / Isabel Hernández Tezoquipa / René Leal Guerrero EDUCACIÓN EN SALUD PÚB... more 1990 Myriam Cardozo Brum / Isabel Hernández Tezoquipa / René Leal Guerrero EDUCACIÓN EN SALUD PÚBLICA 2005. PROSPECTIVA PARA LA PLANEACIÓN ESTRATÉGICA, AVANCES Y PERSPECTIVAS Salud Pública de México, enero-febrero, año/vol. 32, número 001 ...

Salud pública de México, 1990

Journal of Materials Chemistry, 2008

Psychology Learning & Teaching, 2012

Journal of Pharmaceutical and Biomedical Analysis, 2020

Social Sciences

Bulletin of the Korean Mathematical Society

Salud pública de México, 1990