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National Autonomous University of Mexico

5 ARTICLES PUBLISHED IN JoVE

Chemistry

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Rebeca Yépez¹, Juan F. Illescas¹, Paulina Gijón¹, Manuel Sánchez-Sánchez², Eduardo González-Zamora³, Rosa Santillan⁴, J. Raziel Álvarez⁵, Ilich A. Ibarra⁵, Julia Aguilar-Pliego¹

¹Autonomous Metropolitan University-Azcapotzalco, ²Institute of Catalysis and Petroleum Chemistry, ICP-CSIC, ³Department of Chemistry, Autonomous Metropolitan University-Iztapalapa, ⁴Department of Chemistry, Center of Investigation and Superior Studies (IPN), ⁵Research Institute of Material, National Autonomous University of Mexico

The conversion of trans-ferulic acid to vanillin was achieved by heterogeneous catalysis. HKUST-1 was employed in this synthesis and the essential step in the catalytic process was the generation of unsaturated metal sites. Thus, when the catalyst was activated under vacuum, full vanillin conversion (yield of 95%) was obtained.

Chemistry

Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness

Josué Arenas-García¹, Martha V. Escárcega-Bobadilla², Gustavo A. Zelada-Guillén¹

¹Department of Analytical Chemistry, School of Chemistry, National Autonomous University of Mexico, ²Department of Organic Chemistry, School of Chemistry, National Autonomous University of Mexico

A procedure for the synthesis of polystyrene-grafted multiwalled carbon nanotubes using successive chemical modification steps to selectively introduce the polymer chains to the sidewalls and their self-assembly via anisotropic patchiness is presented.

Neuroscience

How to Obtain Reliable Visual Event-related Potentials in Newborns

Lourdes Cubero-Rego¹, Josefina Ricardo-Garcell¹, Thalía Harmony¹, María Corsi-Cabrera^1,2

¹Research Unit in Neurodevelopment, Institute of Neurobiology, National Autonomous University of Mexico, ²Sleep Laboratory, Faculty of Psychology, National Autonomous University of Mexico

Several important points for obtaining high-quality reliable visual evoked potentials (VEPs) in newborns while minimizing variability and the risk of misleading prognoses are presented.

Medicine

Clinical Application of Phase Angle and BIVA Z-Score Analyses in Patients Admitted to an Emergency Department with Acute Heart Failure

Fernanda Bernal-Ceballos^1,2, Lilia Castillo-Martínez³, Yunuen Reyes-Paz³, José Luis Villanueva-Juárez³, Thierry Hernández-Gilsoul⁴

¹Master's and Doctoral Program in Medical, Dental, and Health Sciences, National Autonomous University of Mexico, ²Faculty of Higher Studies Ignacio Zaragoza, National Autonomous University of Mexico, ³Clinical Nutrition Service, National Institute of Medical Sciences and Nutrition Salvador Zubirán, ⁴Emergency Department, National Institute of Medical Sciences and Nutrition Salvador Zubirán

In this protocol, we explain how to obtain and interpret phase angle values and bioelectrical impedance vectorial analysis (BIVA) Z-score obtained by bioelectrical impedance in patients with acute heart failure admitted to the Emergency Department and their clinical applicability as a predictive marker for the prognosis of a 90-day event.

Medicine

Evaluation of Changes in Hydration and Body Cell Mass with Bioelectrical Impedance Analysis after Exercise Program for Rheumatoid Arthritis Patients

Mariel Lozada-Mellado^1,2, José M. García-Morales³, Midori Ogata-Medel³, Juan A. Pineda-Juárez⁴, Lilia Castillo-Martínez^2,3

¹Faculty of Higher Studies Ignacio Zaragoza, National Autonomous University of Mexico, ²Master's and Doctoral Program in Medical, Dental and Health Sciences, National Autonomous University of Mexico, ³Clinical Nutrition Service, National Institute of Medical Sciences and Nutrition Salvador Zubirán, ⁴Research Coordination, National Medical Center November 20

This protocol assesses alterations in hydration and body cell mass status using bioelectrical impedance vectorial analysis following a dynamic exercise program designed for patients with rheumatoid arthritis. The dynamic exercise program itself is detailed, highlighting its components focused on cardiovascular capacity, strength, and coordination. The protocol details steps, instruments, and limitations.