Now showing items 381-400 of 4968

    • Petit, Ignacio J.; González, Camila F.; Gusmao, Joao B.; Álvarez Varas, Rocío; Hinojosa, Iván A. (Allen Press, 2020)
      Understanding animals' daily activity patterns such as foraging and resting is key to the effective conservation of individuals, populations, and species. Expanding habitat usage by humans today is likely one of the major ...
    • Valencia, Evelyn; Meerhoff, Erika; Díaz Cabrera, Ernesto; Guerrero, Felipe; Roja Hernández, Noemí; Vega Retter, Caren; Véliz Baeza, David (Wiley, 2020)
      Population connectivity has a fundamental role in metapopulation dynamics, with important implications in conservation. Easter Island (EI) and Salas y Gomez Island (SG) in the Pacific Ocean are ideal for the study of ...
    • Romero, Néstor; Areche Medina, Carlos; Cubides Cárdenas, Jaime; Escobar, Natalia; García Beltrán, Olimpo; Simirgiotis, Mario J.; Céspedes, Ángel (MDPI, 2020)
      In the present work, the anthelmintic activity (AA) of ethanolic extracts obtained fromGliricidia sepium,Leucaena leucocephala, andPithecellobium dulcewas evaluated using the third-stage-larval (L-3) exsheathment inhibition ...
    • Vidal, Marcela A.; Barría Oyarzo, Ismael; Contreras Ramos, Carolina; Bacigalupe, Leonardo D. (University of Chicago, 2020)
      Amphibian locomotor capacity is strongly linked to temperature and hydration. However, organisms in nature experience covariation of multiple environmental factors, and thus to better understand the effects of thermal and ...
    • Mejía Cortés, Cristian; Castillo Barake, Jorge; Molina Gálvez, Mario (Optical Soc Amer, 2020)
      We address the issue of nonlinear modes in a two-dimensional waveguide array, spatially distributed in the Lieb lattice geometry, and modeled by a saturable non-linear Schrodinger equation. In particular, we analyze the ...
    • Castañeda González, Álvaro; Machado Higuera, Maximiliano (Springer, 2020)
      By one hand, we continue with the study of the liaison between the almost Hurwitz vector fields and density functions. In particular by using mapsHwith nilpotent JacobianJHsuch that their rows are linearly dependent over ...
    • Fong, Lydia J. M.; Navea Bravo, Fernando; Labra, Antonieta (Springer, 2020)
      For a prey, its best ticket to stay alive is to get early and accurate information on predation risk and so, escape from predation at low cost. Some prey species have evolved the ability to eavesdrop signals intended for ...
    • Carrasco Machado, Sebastián; Medina Sánchez, Pablo; Rogan, J.; Valdivia Hepp, Juan Alejandro (American Institute of Physics, 2020)
      We study the impact of deserting a pre-established path, determined by a navigation software, on the overall city traffic. To do so, we consider a cellular automaton model for vehicular traffic, where the cars travel ...
    • Fabres, Alejandra A.; Valladares, Moisés A.; Sáez, Paola; Collado, Gonzalo; Pastenes, Luis; Méndez Torres, Marco A. (Taylor and Francis, 2020)
      The minute freshwater gastropod Heleobia atacamensis is only known from its type locality Tilopozo, located at the southern end of the Atacama Saltpan, Antofagasta Region, Chile. It is classified as Critically Endangered ...
    • Venegas, Maximiliano; Barahona, Salvador; González, Ana María; Sepúlveda, Dionisia; Zúñiga, Gustavo E.; Baeza Cancino, Marcelo; Cifuentes Guzmán, Víctor; Alcaíno Gorman, Jennifer (Frontiers Media, 2020)
      Xanthophyllomyces dendrorhoussynthesizes astaxanthin, a carotenoid used in aquaculture. Astaxanthin is synthesized from metabolites of the mevalonate pathway, which are also precursors for sterols biosynthesis. The ...
    • Behn, Antonio; Rojas Rodríguez, Anita María; Tello Carrera, Miguel (Taylor & Francis, 2020)
      In this work, we present an algorithm running over SAGE, which allows users to deal with group actions on Riemann surfaces up to topological equivalence. Our algorithm allows us to study the equisymmetric stratification ...
    • Ramírez Sarmiento, César; Engelberger, Felipe; Guixé Leguía, Victoria (MDPI, 2020)
      The ribokinase superfamily catalyzes the phosphorylation of a vast diversity of substrates, and its members are characterized by the conservation of a common structural fold along with highly conserved sequence motifs ...
    • Calla Quispe, Erika; Robles, Juana; Areche Medina, Carlos; Sepúlveda, Beatriz (Frontiers Media, 2020)
      We report a green strategy for the extraction of lichen substances fromStereocaulon glareosum. This sustainable alternative does not use volatile toxic organic solvents, but it is assisted by microwave and is checked by ...
    • Jorquera, Gonzalo; Echiburú López, Bárbara; Crisosto, Nicolás; Sotomayor Zárate, Ramón; Maliqueo Yevilao, Manuel; Cruz, Gonzalo (Frontiers Media, 2020)
      Maternal obesity during pregnancy and gestational diabetes mellitus (GDM) are both associated with of several postnatal diseases in the offspring, including obesity, early onset hypertension, diabetes mellitus, and ...
    • Gallardo Fuentes, Sebastián; Ormazabal Toledo, Rodrigo; Fernández, Israel (American Chemical Society, 2020)
      The mechanism and selectivity of phosphine-catalyzed [3 + 2] and [3 + 3] annulations of azomethine imines and allenoates have been computationally studied. Exploration of the potential energy surface reveals that the ...
    • Díaz Narvaez, Víctor; San Martín Roldán, David; Calzadilla Núñez, Aracelis; San Martín Roldán, Pablo; Parody Muñoz, Alexander; Robledo Veloso, Gonzalo (Universidad Sao Paulo, 2020)
      Objective: to explore the best type of curve or trend model that could explain the epidemiological behavior of the infection by COVID-19 and derive the possible causes that contribute to explain the corresponding model and ...
    • Alarcón Muñoz, Jhonatan; Soto Acuña, Sergio; Manríquez, Leslie M. E.; Fernández, Roy A.; Bajor, Dániel; Guevara, Juan Pablo; Suazo Lara, Felipe; Leppe, Marcelo A.; Vargas Milne, Alexander (Elsevier, 2020)
      We describe remains of freshwater turtles from the Upper Cretaceous of Chilean Patagonia. The fossils, which comprise isolated shell fragments and incomplete appendicular bones, were recovered from meandering fluvial ...
    • Navarro, Roberto E.; Muñoz Gálvez, Víctor; Valdivia Hepp, Juan; Moya Fuentes, Pablo (IOP Publishing, 2020)
      Wave-particle interactions are believed to be one of the most important kinetic processes regulating the heating and acceleration of solar wind plasma. One possible explanation for the observed preferential heating of alpha ...
    • Miranda Rojas, Sebastián; Mendizábal Emaldia, Fernando (MDPI, 2020)
      Nowadays, the use of sulfur-based ligands to modify gold-based materials has become a common trend. Here, we present a theoretical exploration of the modulation of the chalcogenides-gold interaction strength, using sulfur, ...
    • Vilches Herrera, Marcelo; Gallardo Fuentes, Sebastián; Aravena Opitz, Mauricio; Yáñez Sánchez, Mauricio; Jiao, Haijun; Holz, Jens; Börner, Armin; Lühr, Susan (American Chemical Society, 2020)
      Reduction of carbonyl moieties to the corresponding alcohol using simply hydrazine hydrate has been considerably unfeasible until now due to the well-known condensation reaction. However, herein, we report that using an ...