Results 61 to 70 of about 170 (162)
European Journal of Organic Chemistry, Volume 29, Issue 29, 7 August 2026.Molecules with unpaired electrons, also known as open‐shell systems, are key intermediates in several light‐mediated or metal‐catalyzed transformations in organic chemistry. However, modeling this chemistry by density functional theory calculations is challenging.
Nil Sanosa +2 more
wiley +1 more source
Bancos de semillas en el suelo Soil seed banks
Agriscientia, 2006 En las comunidades vegetales, el banco de semillas en el suelo (BSS) constituye el potencial regenerativo. La reposición de los individuos a partir del BSS puede tener un efecto marcado en la composición y en los patrones de vegetación de la comunidad ...
M. De Souza Maia, F.C. Maia, M.A. Pérez
doaj
, 2017 ABSTRACT: In October 2014, the natural banks of the bean clam (Donax dentifer) in the sandy intertidal zone and oyster (Crassostrea iridescens) in the rocky subtidal zone in the Region of Tumbes were monitored. In the intertidal, six stations were evaluated, performing transects perpendicular to the coast with two replicates separated every 10 m, and ...
Alemán Mejía, Solange Alexander +4 more
openaire +2 more sources
Advanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.An enantioselective Mannich reaction using barbituric acids as nucleophiles provides access to chiral heterocycles bearing quaternary stereocenters. The transformation is catalyzed by a bifunctional thiourea with high selectivity. An immobilized catalyst enables recycling and application under continuous‐flow conditions, offering an efficient and ...
Rodrigo Sánchez‐Molpeceres +4 more
wiley +1 more source
Three new species of Columnea (Gesneriaceae) from the western Andean slopes of Ecuador and Colombia. [PDF]
PhytoKeys, 2021 Clark JL +4 more
europepmc +1 more source
Evaluación de bancos naturales de invertebrados marinos comerciales, Región La Libertad-Perú, 2012
, 2017 En la Región la Libertad, la mayor producción pesquera artesanal descansa en tres pesquerías del ámbito costero: cangrejo violáceo, caracol negro y pulpo. La pesca de altura de la pota, es importante por los volúmenes que aporta a la pesquería. La evaluación, se realizó en el litoral de la Región La Libertad, desde Chérrepe (7°9’35,4”S – 79°41’8,2”W ...
Alfaro Mudarra, Santos +4 more
openaire +2 more sources
, 2022 ABSTRACT: Morphologically, the area located between Ensenada and the mouth of the Chancay river (Huaral, Lima Region) is characterized by exposed beaches of a sandy substrate, a strip of rocky shoals, and cliffs. From the coastal strip up to 1400 m, the area has a plain that reaches a depth of 20 m, predominantly shallow and rocky areas to the north up
Ramírez Quezada, Adrián +3 more
openaire +2 more sources
The extension of the taxon cycle model to island plants: insights from the Canarian vascular flora
Biological Reviews, Volume 101, Issue 4, Page 2053-2076, August 2026.ABSTRACT Taxon cycle models describe eco‐evolutionary patterns of lineage colonization, diversification, and decline across archipelagos, inferring an important role for competition amongst ecologically similar taxa in driving concurrent niche changes.
José María Fernández‐Palacios +2 more
wiley +1 more source
Investigaciones Geográficas, 2006 Santa Cruz, provincia ubicada en el extremo sur del territorio continental argentino, posee un ambiente fuertemente condicionado por la fragilidad de sus características naturales y una situación socioeconómica tradicionalmente orientada a la ...
María Eugenia Cepparo de Grosso
doaj
Evaluación de bancos naturales de invertebrados marinos comerciales, Región La Libertad-Perú, 2011
, 2017 Informe IMARPE 43(1), 2016 p.
Alfaro Mudarra, Santos +4 more
openaire +1 more source