Results 71 to 80 of about 216,590 (232)

Estado Vital de la Materia. Su origen, su evolución y su futuro.

open access: yesMedicina, 2001
<p>En este artlculo se hacen algunas observaciones sobre un estado de la materia (estado vital), propuesto para reemplazar el de materia viva, que se usa habitualmente.</p><p>La materia en estado vital se organiza por una fuerza interna,
J. Hernando Ordoñez
doaj  

Brazil's Invisible Invaders: Are Craspedacusta Jellyfish a Ticking Ecological Bomb?

open access: yesAustral Ecology, Volume 51, Issue 3, March 2026.
ABSTRACT The invasive freshwater jellyfish Craspedacusta sowerbii, likely of Asian origin, is globally distributed, yet its invasion history in South America remains poorly understood. Following a mass mortality event of tilapia (Oreochromis niloticus) during a jellyfish bloom in Paraná, Brazil, in March 2022, we conducted morphological and molecular ...
Luana Maria Deoclécio da Silva   +7 more
wiley   +1 more source

Genetics and genomic medicine in Argentina [PDF]

open access: yes, 2018
A historical summary of genetics and genomic medicine in Argentina. We go through the achievements and difficulties in the implementation of genetic and genomic services both in academia and health care.Fil: Vishnopolska, Sebastián Alexis.
Avena   +27 more
core   +1 more source

Pinopsin Regulates Melatonin Production and Daily Locomotor Activity: Functional Insights From Gene‐Edited Xenopus Tadpoles

open access: yesJournal of Pineal Research, Volume 78, Issue 2, March 2026.
ABSTRACT Circadian rhythm alignment depends on environmental light detection via opsins. Pinopsin, originally identified in the pineal organ of birds and later in amphibian pineal complex and eyes, may play a role in this process, though its function has not been genetically tested.
Neda Heshami   +4 more
wiley   +1 more source

On the boundedness of some nonlinear differential equation of second order [PDF]

open access: yes, 2015
In this paper we study the boundedness of the solutions of some nonlinear dofferential equation using as a key tool the Second Lyapunov method, i.e. find sufficient conditions under which the solutions of this equation are bounded.
Guzmán, Paulo Matias   +2 more
core  

Spin response of impurities in a quantum corral [PDF]

open access: yes, 2014
In this work we investigate the dependence of spin observables, like the total spin alignment and the spin squeezing factor, for electrons confined inside an elliptic quantum corral and interacting with a pair of impurities located on the semi-major axis
Civitarese, Enrique Osvaldo   +2 more
core   +1 more source

La guerra entre ciencias exactas y humanidades en el fin de siglo: el esc ndalo Sokal y una propuesta pacificadora

open access: yesCiencia Ergo Sum, 2000
Se aborda la discusión que se ha dado entre las ciencias exactas y humanas, a partir del escándalo provocado por el físico Alan Sokal, y se destaca la necesidad de desarrollar un proyecto científico técnico que unifique ciencias y humanidades.
Antonio Arellano Hernández
doaj  

On the Role of Western Boundary Currents to Fertilize Adjacent Continental Shelves at Interannual Scales: A Case Study in the Southwestern Atlantic

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Exchanges between continental shelves and open ocean basins regulate the transport of heat, salt, and nutrients. In the Southwestern Atlantic, the western boundary current known as the Malvinas Current (MC) fertilizes the outer shelf through recurrent slope‐water intrusions.
Carola Ferronato   +2 more
wiley   +1 more source

Characterization of the atmospheric depth profile using the ground-level temperature: The case of Malargüe, Argentina [PDF]

open access: yes, 2013
We present a study of the atmospheric depth profile and the dependence with its characteristic parameters. We introduce a new model, named GAMMA, based on a parameterization that allows us to obtain the atmospheric depth profile specifying only one ...
Moreno, Juan Cruz, Sciutto, Sergio Juan
core   +3 more sources

Redes sociales como facilitadoras del aprendizaje de ciencias exactas en la educación superior

open access: yesApertura, 2015
El uso de las redes sociales se ha generalizado en todos los ámbitos, y el sector educativo no es la excepción. El objetivo del trabajo que aquí presentamos es relacionar el uso de las redes sociales con el aprendizaje de las ciencias exactas en una ...
Irma Leticia Chávez Márquez   +1 more
doaj  

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