Results 31 to 40 of about 12,211 (148)

La Sociedad Salvadoreña de 1989

open access: yesLa Universidad, 2018
El presente artículo tiene como objetivo la caracterización sistemática de la realidad salvadoreña La aplicación se hará con base en la categorización clásica de formación social y la de Bloque Histórico, mediante los cuales la sociedad salvadoreña la ...
Coordinación Universitaria de Investigación Científica
doaj  

Water–air carbon fluxes in the coastal upwelling zone off northern Baja California

open access: yesCiencias Marinas, 2015
An important challenge in marine science is to quantify the air–sea flux of carbon because of its possible relation to climate change and the decreasing pH in seawater.
Mauricio Alfredo Muñoz-Anderson   +4 more
doaj   +1 more source

Amaranto: distribución y diversidad morfológica del recurso genético en partes de la región Maya (sureste de México, Guatemala y Honduras)

open access: yesActa Botanica Mexicana, 2020
Antecedentes y Objetivos: El amaranto es de interés mundial por su valor nutricional como verdura y grano. Las especies cultivadas de mayor importancia comercial por su producción de grano son Amaranthus caudatus, A. cruentus y A. hypochondriacus.
Erick A. Aguilera-Cauich   +4 more
doaj   +1 more source

Towards of multi-source data fusion framework of geo-referenced and non-georeferenced data: prospects for use in surface water bodies

open access: yesGeocarto International, 2023
This paper proposes an approach of fusion geo-referenced and non-georeferenced data. These data can be acquired by a) unmanned surface vehicles (USVs), b) unmanned aerial vehicles (UAVs), c) airborne and submersible optical sensors, d) acoustic sensors ...
Fermín Villalpando   +3 more
doaj   +1 more source

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

open access: yesAdvanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez   +9 more
wiley   +1 more source

Primary productivity observations in the eastern tropical Pacific off Cabo Corrientes, Mexico

open access: yesCiencias Marinas, 2009
The in situ primary productivity (PP) and phytoplankton biomass (chlorophyll a concentration, Chla) of the Cabo Corrientes region, in the eastern tropical Pacific off Mexico, were studied using data from three oceanographic cruises (May and November ...
DC López-Sandoval   +4 more
doaj   +1 more source

Mesoporous Silica Nanoparticles in Biomedicine: Advances and Prospects

open access: yesAdvanced Materials, EarlyView.
Mesoporous silica nanoparticles offer unique properties like high surface area, tunable pores, and functionalization. They excel in drug delivery, tissue engineering, and stimuli‐responsive therapies, enabling targeted and controlled treatments. With roles in cancer therapy and diagnostics, their clinical translation requires addressing challenges in ...
Miguel Manzano, María Vallet‐Regí
wiley   +1 more source

Influence of mother plant age on the in vitro propagation of Agave cupreata Trel. & A. Berger via organogenesis

open access: yesDiscover Plants
Agave cupreata Trel. & A. Berger is an endemic species from southern Mexico with cultural and economic value due to its use in mezcal production. The increasing global demand for mezcal has led to intense overexploitation, resulting in a marked decline ...
Antonio Rescalvo-Morales   +5 more
doaj   +1 more source

Variabilidad estacional e interanual de la concentración de clorofila y de la productividad primaria frente al estado de Campeche, golfo de México

open access: yesCiencias Marinas, 2022
El objetivo de este trabajo fue caracterizar la variabilidad espaciotemporal de clorofila satelital (Clsat), productividad primaria (PP), temperatura de la superficie del mar (TSM) y altura del nivel del mar (ANM) de julio de 2002 a diciembre de 2018 en
Santiago J Quetz-Que   +4 more
doaj   +1 more source

High Light Utilization and Color Rendering in Vacuum‐Deposited Semitransparent Perovskite Solar Cells

open access: yesAdvanced Materials, EarlyView.
In this work, low bandgap (≈1.55 eV) semitransparent perovskite solar cells (ST‐PSCs) having thin (thickness < ≈100 nm) perovskite layers and transparent conductive oxide‐based rear electrodes are fabricated using vacuum‐deposition methods. Two different ST‐PSCs demonstrated a high light utilization efficiency value of 4.2 (PCE: 9.26% and AVT: 45.3 ...
Abhyuday Paliwal   +9 more
wiley   +1 more source

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