Results 31 to 40 of about 15,364 (166)

Eye Darkening Under Dehydration Stress in the Neotropical Frog Boana punctata (Schneider, 1799)

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
Dehydration induces a strong and partially reversible increase in iris pigmentation in the Neotropical frog Boana punctata. The tight relationship between iris darkening and hydration state identifies ocular pigmentation as a simple, non‐invasive physiological biomarker with broad potential for assessing hydric stress in amphibian populations ...
Ricardo Reques, Eduardo F. Schaefer, Eduardo A. Sanabria, Leonardo D. Aguiar, Lorena B. Quiroga, Miguel Tejedo   +5 more
wiley   +1 more source

El conocimiento de los profesores de Ciencias Naturales de secundaria: un estudio en tres niveles

Revista Iberoamericana de Educación, 2007
El presente trabajo muestra un diagnóstico sobre los conocimientos que, de la disciplina que enseñan, tienen los profesores de Biología, Física y Química de Secundaria en México en una muestra de 10 Estados del país.
Fernando Flores Camacho, Leticia Gallegos Cázares, Alejandra García Franco, Eduardo Vega Murguía, Beatriz García Rivera   +4 more
doaj  

Single-Breathhold 3D MR Elastography in the Liver, With Simultaneous R2* and PDFF Mapping. [PDF]

Magn Reson Med
Purpose To develop a sequence for the rapid acquisition of MR elastography (MRE) parameters in 3D, with simultaneous measurement of proton‐density fat fraction (PDFF) and R2* for multiparametric assessment of liver disease. Methods The proposed sequence uses an interleaved motion‐encoding scheme to acquire 3D volumes of all motion encodings and wave ...
Tripp DP, van Schelt AS, Darwish O, Kunze KP, Al Harthy S, Metwalli NS, Gharib AM, Prieto C, Botnar RM, Sinkus R, Neji R.   +10 more
europepmc   +2 more sources

Bias Correction of ERA5 Temperature Across Five Topoclimatic Clusters: A Comparative Evaluation of Four Methods

International Journal of Climatology, EarlyView.
ERA5 near‐surface temperature over South America exhibits systematic cold biases in daily maximum temperature and warm biases in daily minimum temperature. To address the continent's strong climatic and topographic heterogeneity, South America was partitioned into five topoclimatic clusters, and four bias‐correction approaches were evaluated. The Multi‐
José Roberto Rozante, Gabriela Rozante
wiley   +1 more source

Electrical circuits RC and RL involving fractional operators with bi-order

Advances in Mechanical Engineering, 2017
This article describes electrical series circuits RC and RL using the concept of derivative with two fractional orders α and β in Liouville–Caputo sense. The fractional equations consider derivatives in the range of α , β ∈ ( 0 ; 1 ] .
JF Gómez-Aguilar, RF Escobar-Jiménez, VH Olivares-Peregrino, MA Taneco-Hernández, GV Guerrero-Ramírez   +4 more
doaj   +1 more source

The complete chloroplast genome of the national tree of Peru, quina (Cinchona officinalis L., Rubiaceae)

Mitochondrial DNA. Part B. Resources, 2021
Here, we report the first complete chloroplast (cp) genome of Cinchona officinalis. This cp genome has a 156,984 bp in length with typical quadripartite structure, containing a large single copy (LSC) region (83,929 bp) and an 18,051 bp small single-copy
Carlos I. Arbizu, Rubén D. Ferro-Mauricio, Julio C. Chávez-Galarza, Juan Carlos Guerrero-Abad, Héctor V. Vásquez, Jorge L. Maicelo   +5 more
doaj   +1 more source

Soil and Forest Degradation Driven by Cattle Grazing and Selective Logging in Sub‐Antarctic Nothofagus Ecosystems of Patagonia

Land Degradation &Development, EarlyView.
ABSTRACT Soil and forest degradation driven by chronic land‐use pressures is an increasingly widespread process in forested landscapes worldwide, yet its empirical characterization remains limited, particularly in temperate and sub‐Antarctic ecosystems.
Carlos Zamorano‐Elgueta, Susana Valle, Simona Landi, José Dörner, Luis Cayuela   +4 more
wiley   +1 more source

A Geometric Interpretation for the Algebraic Properties of Second‐Order Ordinary Differential Equations

Mathematical Methods in the Applied Sciences, Volume 48, Issue 6, Page 6912-6917, April 2025.
ABSTRACT Nowadays, a substantial portion of investigations concerning the symmetry analysis of differential equations predominantly adhere to a framework comprising the following key procedures: (i) the derivation of symmetries, (ii) the determination of an optimal system, (iii) the utilization of these symmetries to construct invariants or ...
A. Paliathanasis, S. Moyo, P. G. L. Leach   +2 more
wiley   +1 more source

Modelado simbólico del conjunto Óptimo de Pareto de dos celdas de ganancia unitaria

Dyna, 2016
En este trabajo es presentado un método para extraer datos acerca de los resultados de un dimensionamiento de circuitos analógicos para extraer características que puede ser inmediatamente utilizado por diseñadores o estudiantes de diseño de circuitos ...
Said Polanco-Martagón, José Ruiz Ascencio, Miguel Aurelio Duarte Villaseñor   +2 more
doaj   +1 more source

Evaluation of electrolyzed water to control fungal trunk pathogens in grapevine nurseries

Pest Management Science, Volume 81, Issue 4, Page 1740-1751, April 2025.
Electrolyzed water treatments could have promising applications in the grapevine nursery process to prevent or reduce infections caused by fungal trunk pathogens on grapevine propagation material. Abstract BACKGROUND Grapevine producers demand solutions to control fungal trunk pathogens (FTPs) in nurseries.
Mónica Berbegal, Adolfo Blasco, Grégoire Gaume, Pedro Amorós, Antônia Fernandes, José V. Ros‐Lis, Josep Armengol   +6 more
wiley   +1 more source