Buscador de Tesis y publicaciones académicas

Artículo 2026 Acceso abierto Revisado por pares

Comparative Experimental Raman, DFT, and Chemometric Characterization of Selected Phenolic Acids: Structural and Environmental Contributions to the Vibrational Response

Jose Alfonso Prieto Palomo · Juan Lopez-Martinez · Joaquín Alejandro Hernández Fernández

Phenolic acids exhibit structure-dependent vibrational responses governed by aromatic substitution, π-conjugation, oxygenated functional groups, and molecular environment. In this work, p-coumaric, caffeic, trans-ferulic, and gallic acids were investigated through an integrated experimental Raman, density functional th...

HOMO–LUMO analysis molecular electrostatic potential principal component analysis Raman spectroscopy

• MDPI AG
• English
• DOI: 10.3390/molecules31152667

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Artículo 2026 Acceso abierto

Tracing the Context of Shrimp Trawling in the Colombian Caribbean: Insights into Fish Communities and Fisheries Policy

Caldas Aristizábal, Juan Pablo · García, Camilo Bernardo · Jaramillo, Laura

List of regulations issued in Colombia related to shrimp fishing. The type of regulation is specified, along with the legislative framework of each norm, its regulatory identifier, year of issuance, current status, geographic area of application, and a brief description of its scope.

biological sciences natural sciences

• Zenodo
• DOI: 10.5281/zenodo.21722779

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Artículo 2026 Acceso abierto Revisado por pares

Sexual Dimorphism in Flight-Related Structures of a Paper Wasp

Bruno Matheus Gomes · André Rodrigues de Souza · Fábio Santos do Nascimento · Carlos E. Sarmiento

Male and female paper wasps (Vespidae: Polistinae) perform different behavioral roles. Thus, sexes may experience distinct selective pressures that may ultimately affect body size, shape, and proportions. We investigated this in the neotropical Polistes simillimus. We compared 100 males and 100 females using linear mor...

Vespidae allometry geometric morphometrics aerodynamics

• MDPI AG
• English
• DOI: 10.3390/insects17080794

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Artículo 2026 Acceso abierto Revisado por pares

Reactor-Grade Non-Additive Polypropylene Architecture Defines the Physicochemical Limits of Melt Flow Index Model Transferability: An Industrial Chemometric and Machine Learning Study

Joaquín Hernández-Fernández · Juan Lopez-Martinez

Rapid estimation of the melt flow index (MFI) is essential for the timely control of industrial polypropylene polymerization because conventional plastometer measurements require offline sampling and introduce analytical delays. This work investigates the physicochemical limits of MFI model transferability using 425 re...

machine learning soft sensors polymer architecture impact copolymers

• MDPI AG
• English
• DOI: 10.3390/polym18151880

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Artículo 2026 Acceso abierto Revisado por pares 1 cita

Lignocellulosic Activated Carbon as a Powerful Glyphosate Adsorption Agent in Contaminated Water

Carlos Alberto Guerrero-Fajardo · David Bocanegra-Cárdenas

One of the main contaminants in water sources is glyphosate, a broad-spectrum, non-selective herbicide whose use has increased due to intensive agriculture in the 21st century. Therefore, this research aims to produce four samples of activated carbon for the adsorption of this contaminant. Initially, corn cob residue w...

glyphosate adsorption environmental biotechnology corn cob waste

• MDPI AG
• English
• DOI: 10.3390/su18157769

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Artículo 2026 Revisado por pares

Structural stability and electronic correlations in the Janus-Kagome van der Waals semiconductors M 3 TeI 7 (M = Nb, Ta)

J D Gutiérrez Londoño · R Ponce-Pérez · R González-Hernández · J Guerrero-Sánchez

Abstract The structural and electronic properties of the Janus-Kagome compounds Nb 3 TeI 7 and Ta 3 TeI 7 are investigated through first-principles density functional theory (DFT) calculations. These layered materials combine the electronic characteristics of Kagome lattices with the intrinsic polarity arising from Jan...

• IOP Publishing
• DOI: 10.1088/1361-648x/ae8aa0

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Artículo 2026 Acceso abierto Revisado por pares

Silydianin Improves the Preservation of Cooled Boar Semen

Kelly Vanessa Zapata Carmona · Mauricio Rojas López · Benjamín Alberto Rojano · Giovanni Restrepo Betancur

ABSTRACT Cooled boar sperm is susceptible to oxidative stress, therefore, the addition of antioxidants to the extender has been a recurring alternative. The objective of this research was to evaluate the effect of silydianin (SILYD) on the preservation of cooled boar semen. Fifteen ejaculates from five boar were extend...

Male Membrane Potential, Mitochondrial Semen Analysis Cold Temperature

• Wiley
• English
• DOI: 10.1111/rda.70301

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Artículo 2026 Acceso abierto Revisado por pares

From Circuits to Symphonies: A Systems‐Engineering Blueprint for Multimicrobial Synthetic Biology

Miguel Fernández‐Niño · Ludger A. Wessjohann · José Manuel Guillamón · Daniela Burgos‐Toro · y 6 más

ABSTRACT Synthetic biology is expanding from single‐species engineering toward the design of synthetic microbial consortia capable of distributed metabolism, coordinated behavior, and enhanced functional robustness. However, engineering frameworks derived from intracellular genetic circuits remain insufficient to captu...

Perspective

• Wiley
• English
• DOI: 10.1002/advs.76981

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Artículo 2026 Acceso abierto Revisado por pares

An Introduction to a Generalized Relativistic Wave Dierential Operator in the Quantum Field Theory

Jaramillo Quiceno, Julio

This work presents a unified operator framework for quantum field theory based on a generalized relativistic wave differential operator defined on Minkowski space. Through the systematic selection of discrete parameters α, β, λ, m, and n ∈ N, this operator reproduces fundamental cases such as the Klein-Gordon, Dirac, a...

Dirac Equation Generalized differential operators Lorentz covariance Proca equation

• Universidad Nacional de Colombia
• DOI: 10.15446/mo.n73.127754

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Artículo 2026 Acceso abierto Revisado por pares

Influence of Carbon Content on the Microstructure, Mechanical Properties, Tribological Behavior, and Thermal Stability of (TiAlTaZrNb)Cx High-Entropy Carbide Coatings

Gilberto Bejarano Gaitán · Daniela María Chimá · Juan Manuel Meza · Aleksei Obrosov · y 1 más

High-entropy carbide (HEC) coatings have emerged as promising candidates for extreme tribological and high-temperature applications; therefore, the objective of this work is to systematically investigate the correlation between carbon stoichiometry and the microstructural evolution, mechanical response, and thermal sta...

materials engineering magnetron sputtering tribology engineering and technology

• MDPI AG
• English
• DOI: 10.3390/ma19153243

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