Results 51 to 60 of about 45,162 (227)

Phylogeny of subtribe Gonolobinae (Apocynaceae‐Asclepiadoideae) based on molecular and morphological data with a revised generic classification

TAXON, Volume 75, Issue 2, April 2026.
Abstract The presently most densely sampled molecular phylogeny of the widespread New World subtribe Gonolobinae is presented, including about 35% of the ca. 520 species. Sampling focused on an even representation of the three main areas of total Gonolobinae distribution, South America, Central/North America, and the West Indian Islands, and the ...
Sigrid Liede‐Schumann, Gilberto Morillo, Ulrich Meve, Héctor A. Keller, Kurt Neubig   +4 more
wiley   +1 more source

A Characterisation of Extreme‐Heat Occurrence and Its Trends in Mexico Based on a High Resolution Dataset

International Journal of Climatology, Volume 46, Issue 3, 15 March 2026.
As Mexico faces rising temperatures and increasing events of extreme heat, improvements in the analysis and characterisation of these phenomena are necessary, as they offer new insights into the spatial variability of such trends and their underlying causes.
David Maximiliano Zermeño‐Díaz
wiley   +1 more source

Los janambres de Tamaulipas

Revista Chicomoztoc, 2021
Esta investigación espera hacer aportes para la caracterización del modo de subsistencia de los janambres con el objetivo de analizarlo y entenderlo. Primero, se trata de una investigación que permita aproximarse a una definición del modo de subsistencia recolector cazador de los indígenas janambres y las actividades concomitantes.
openaire   +1 more source

Inter‐ and intra‐individual variation in the feather coloration of American crows

Journal of Avian Biology, Volume 2026, Issue 2, March 2026.
Avian feathers are remarkably diverse in both form and function. Coloration is among the most studied feature of feathers, but we know relatively little about melanin‐based black coloration. Despite many crows (Corvus sp.) and other corvids having black feathers that appear uniform to human perception, their feather coloration could play an important ...
Jessica L. Yorzinski, Anne B. Clark
wiley   +1 more source

Flame Retardant Polyolefins Using Fibers From Leather Waste: Adjusting Extrusion Variables to Balance the Property Profile

Journal of Vinyl and Additive Technology, Volume 32, Issue 2, Page 410-430, March 2026.
Adjusting extrusion variables are a key to balance the flame retardancy and mechanical properties of polyolefin/leather waste fiber composites. ABSTRACT The extrusion processing variables represent a key to the optimal use of additives and thus the development of flame‐retardant polymer composites. Adjusting the property profile, for example, finding a
Guadalupe Sanchez‐Olivares, Sven Brehme, Fausto Calderas, Bernhard Schartel   +3 more
wiley   +1 more source

High-precision U-Pb ages in the early Tithonian to early Berriasian and implications for the numerical age of the Jurassic-Cretaceous boundary [PDF]

, 2019
The numerical age of the Jurassic-Cretaceous boundary has been controversial and difficult to determine. In this study, we present high-precision U-Pb geochronological data around the Jurassic-Cretaceous boundary in two distinct sections from different ...
Aguirre-Urreta, Maria Beatriz, Concheyro, Graciela, Lena, Luis, Lescano, Marina Aurora, López Martínez, Rafael, Naipauer, Maximiliano, Pimentel, Márcio, Ramos, Victor Alberto, Samankassou, Elias, Schaltegger, Urs, Vennari, Verónica Vanesa   +10 more
core   +1 more source

Oil in Southern Tamaulipas, Mexico [PDF]

Transactions of the AIME, 1919
The great activity with which the oil resources of the northern Cantons ofthe State of Veracruz have been developed has largely resulted from the greatsuccess obtained by the important explorations carried out since 1902 in theEbano district in the North, and several years later near Tuxpam, in the South.It must not be thought that these successes were
openaire   +1 more source

Accelerational Implications of Hummingbird Display Dives [PDF]

, 1995
Integrative ...
Dudley, Robert, Larimer, James L.
core   +1 more source

The Influence of African Easterly Waves on Atlantic Tropical Cyclone Tracks and Landfall in Large Ensembles

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 1, 16 January 2026.
Abstract African easterly waves (AEWs) are an important precursor or “seed” for Atlantic tropical cyclones (TCs), with 60%–80% of major hurricanes observed to originate from AEWs. However, climate model simulations indicate that AEWs are not necessary to maintain annual Atlantic TC frequency.
Ronald H. Kouski Jr., Christina M. Patricola‐DiRosario, Emily Bercos‐Hickey, Mark D. Risser   +3 more
wiley   +1 more source

Aproximación teórica al estudio de los procesos migratorios permanentes

Estudios Sociales, 2013
La economía, la sociología y la geografía han proporcionado esquemas teóricos que explican la migración permanente. La teoría económica neoclásica, la nueva economía de la migración laboral, la teoría del capital social, la teoría transnacional y la ...
Simón Pedro Izcara Palacios
doaj