Results 21 to 30 of about 195 (147)

Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2021
Using a microwave-assisted hydrothermal method, we synthesized BiOBr powders, with and without, glycine or phenylalanine as templates. The samples were characterized by X-ray Diffraction, UV–Vis Diffuse Reflectance Spectroscopy, and Field Emission Gun ...
Genesis de O. Lima   +9 more
doaj   +1 more source

Estudio de la incidencia de los rayos ultravioletas (uv) en la localidad de Ayacucho - sus consecuencias

open access: yesInvestigación, 2018
Determinar el índice de ultravioleta en Ayacucho, por cada día y mes en cinco años consecutivos de observaciones. Se procesaron los datos del índice de UV medios y registrados con una estación computarizada instalada al interior de la Estación Meteorológica de Ayacucho, propiedad de la Universidad Nacional de San Cristóbal de Huamanga, cuyas ...
openaire   +2 more sources

Air–Water Greenhouse Gases Exchange in Surface Waters of Deception Island (South Shetland Archipelago, Antarctica): Assessment of Drivers of Spatial Variability

open access: yesJournal of Geophysical Research: Biogeosciences, Volume 131, Issue 10, October 2026.
Abstract Greenhouse gases (GHGs) such as Carbon Dioxide (CO2), Methane (CH4), and Nitrous Oxide (N2O) play critical roles in global climate change. CO2 dominates due to its high concentration and long atmospheric lifetime, while CH4 and N2O also exert strong heat‐trapping effects despite shorter residence times. Deception Island, in the Southern Ocean,
S. Amaya‐Vías   +9 more
wiley   +1 more source

Prototipo funcional para la medición y consulta de nivel UV utilizando el internet de las cosas

open access: yesProgramación Matemática y Software
El acceso a dispositivos avanzados para la medición de fenómenos naturales cada vez es más accesible para su uso en proyectos personales, una muestra son algunos sensores que funcionan con microcontroladores, como objetivo general de este trabajo se ...
Jesús Velázquez Macias   +3 more
doaj   +1 more source

Remoción de sales de cobre por sodalitas recubiertas con hidróxidos doble laminares

open access: yesTecnología y ciencias del agua
Se sintetizaron zeolitas tipo sodalita a partir de silicio y aluminio posconsumo, las cuales se recubrieron con el hidróxido doble laminar (HDL) con una relación molar Mg2+ / Al3+ = 2, que se formaron por el método de coprecipitación a baja saturación ...
Andrea P. Aparicio   +2 more
doaj   +1 more source

Evaluating the Molecular Potential and Interpretability of DNA in Historical Spirit Collection Media

open access: yesMolecular Ecology Resources, Volume 26, Issue 4, May 2026.
ABSTRACT Advancements in historical genomics increasingly leverage museum collections to study past ecosystems, species interactions and biodiversity. Formalin‐fixed, ethanol‐preserved specimens, once thought inaccessible to molecular analyses due to DNA degradation, are emerging as valuable genomic resources.
Rachel L. Tulloch   +5 more
wiley   +1 more source

Estudio de los efectos del fuego en las tablas del Maestro de san Narciso - Franci Joan (1481-1515) de la Iglesia Catedral Basílica Metropolitana de Valencia

open access: yesGe-conservación, 2022
En este trabajo se presentan los estudios realizados por el Institut Valencià de Conservació, Restauració i Investigació (IVCR+i) en dos pinturas sobre tabla, que integrarían parte de la predela del Retablo de san Narciso, encargado a Franci Joan (1481 ...
Livio Ferrazza   +5 more
doaj   +1 more source

A Molecular Hybrid 2D/3D Carbon Allotrope: Synthesis of Adamanphene

open access: yesChemistryEurope, Volume 4, Issue 3, March 2026.
Adamanphene fuses diamond and graphene at the molecular level. An adamantane core anchors four hexabenzocoronene nanographenes into a rigid tetrahedral architecture, giving rise to a porous π‐stacked solid with electronically isolated chromophores and aggregation‐induced emission.
Marina Iglesias‐Rabadán   +3 more
wiley   +1 more source

Structural, electrical transport and optical properties of doped La0.7Ca0.3MnO3 ceramics

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2022
In this study, we have investigated the structural, electrical transport and UV–Visible properties of polycrystalline La0.7Ca0.3−xKxMnO3 (x = 0.0, 0.05, 0.10, 0.20) ceramic samples prepared by conventional solid-state reaction.
Pratik Lakhani   +5 more
doaj   +1 more source

A novel single‐cell NAD‐ME C4 subtype integrated with CAM and bicarbonate use in an aquatic plant

open access: yesNew Phytologist, Volume 249, Issue 5, Page 2386-2401, March 2026.
Summary Many plants maximize photosynthesis by using a CO2‐concentrating mechanism (CCM). Based on physiology, the freshwater plant Ottelia alismoides has three CCMs: C4 metabolism (NAD‐malic enzyme (NAD‐ME) subtype) and bicarbonate‐use during the day plus crassulacean acid metabolism (CAM) at night and lacks Kranz anatomy. Here, we combined a range of
Hong Sheng Jiang   +11 more
wiley   +1 more source

Home - About - Disclaimer - Privacy