Results 61 to 70 of about 14,208 (257)

Oocyte–cumulus cell interaction: a key factor in early embryo development

open access: yesBiological Reviews, EarlyView.
ABSTRACT The evaluation of oocyte competence is a fundamental step in achieving successful outcomes following assisted reproduction techniques (ART). At present, however, conventional oocyte maturation assessment is carried out by morphological observation, which is a subjective method that does not consider molecular features.
Marc Torres‐Garrido   +2 more
wiley   +1 more source

El Quijote en el nacionalismo de Valentí Almirall

open access: yesE-Spania
This paper explores Valentí Almirall’s (1841-1904) contribution to the way in which Catalan nationalism would value, before the celebration of the third centenary of Don Quixote in 1905, the role of Cervantes and his character. Thus, we contextualize the
Jesús Pérez-Magallón
doaj   +1 more source

On a Criterion for Catalan's Conjecture [PDF]

open access: yesThe Ramanujan Journal, 2001
We give a new proof of a theorem by P. Mihailescu which states that the equation $x^p-y^q=1$ is unsolvable with $x, y$ integral and $p, q$ odd primes, unless the congruences $p^q \equiv p\pmod{q^2}$ and $q^p\equiv q \pmod{p^2}$ hold.
openaire   +3 more sources

Organizational Policies and Environmental Innovation: The Mediating Role of Environmental Partnerships

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT Although cross‐sector collaborations drive innovation, organizational policies as legitimation signals attracting such collaborations remain unexplored. This study examines the mediating role of environmental partnerships between organizational policies and environmental innovation.
Jose Nicolas Pacheco   +3 more
wiley   +1 more source

El sueño de la nación produce ensayos: el ensayismo de reflexión nacional de Joan Fuster

open access: yesCahiers de Civilisation Espagnole Contemporaine, 2012
The article studies the intellectual origins of the Spanish writer Joan Fuster i Ortells (1922-1992) and the main characteristics of his abundant written production related to «reflecting upon the nation» –this is the essays Joan Fuster dedicates to the ...
Roberto Rodríguez Milán
doaj   +1 more source

The Euler-Catalan Identity

open access: yesEuropean Journal of Combinatorics, 1988
The author derives a recurrence relation for \(\sum_{\sigma \in S_ n}t^{d(\sigma)}q^{m(\sigma)}p^{i(\sigma)}u^{a(\sigma)}v^{b(\sigma)}\) which is a common generalization of recurrence relations of Euler numbers and Catalan numbers. Here d(\(\sigma)\) is the descent number, m(\(\sigma)\) is the major index, i(\(\sigma)\) is the inversion number, a ...
openaire   +2 more sources

Pre‐industrial land‐use limits contemporary shrub encroachment in the French Alps

open access: yesEcography, EarlyView.
Shrub encroachment has become a global phenomenon in recent decades. While global warming in the Arctic is often cited as the primary cause, human‐managed mountain regions have experienced intense historical land‐use that may also play a considerable role.
Baptiste Nicoud   +6 more
wiley   +1 more source

Les revistes bilingües a la Tortosa de la II República

open access: yesScripta: Revista Internacional de Literatura i Cultura Medieval i Moderna, 2017
Resum: Enmig d’un panorama periodístic escrit exclusivament en castellà, sorgeix el primer rotatiu escrit íntegrament en català a Tortosa: La Veu de Tortosa.
M. Carme Gombau Domingo
doaj   +1 more source

Polycarbazole–NiOOH Interfacial Engineering of BiVO4 Photoanodes for Efficient and Stable Solar Water Splitting

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A π‐conjugated carbazole (p‐CBZ) layer is electro‐polymerized on BiVO4 to form a p–n heterojunction that enhances charge separation and suppresses surface recombination, while a NiOOH co‐catalyst accelerates oxygen evolution kinetics. The synergistic BVO/p‐CBZ/NiOOH photoanode delivers a high photocurrent density and long‐term stability for efficient ...
Lakshman Sundar Arumugam   +11 more
wiley   +1 more source

Imagen y represión del "rojo separatista" : algunos ejemplos de la izquierda catalana en 1939

open access: yesEspacio, Tiempo y Forma. Serie V, Historia Contemporánea, 1998
La represión y la violencia políticas desatadas por los militares sublevados y sus cómplices civiles, a partir de verano de 1936, no solamente fue un aspecto ya previsto y programado de la insurreción, sino que también se extendió por todo el territorio
Francesc Vilanova Vila-Abadal
doaj   +1 more source

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