Results 51 to 60 of about 134,277 (185)

Accurate estimation of photosynthetic available radiation from multispectral downwelling irradiance profiles

open access: yesLimnology and Oceanography: Methods, Volume 23, Issue 4, Page 261-272, April 2025.
Abstract Photosynthetic available radiation (PAR) is the light usable by photosynthetic organisms. Photosynthetic available radiation measurements at depth are required to quantify the light availability for primary production. Direct PAR measurements may be measured with full‐spectrum quantum sensors for the range 400 to 700 nm.
Jaime Pitarch   +7 more
wiley   +1 more source

Evaluación histórica de indicadores productivos en vacas lecheras en sistemas a pastoreo

open access: yesLa Granja: Revista de Ciencias de la Vida, 2018
Se utilizaron datos retrospectivos correspondientes a las lactancias de 300 vacas primíparas y multíparas de raza Holstein, recolectados entre los años 1992-2012 en un lechería-cabaña ubicado de la localidad de Casilda, provincia de Santa Fe-Argentina ...
Pablo Roberto Marini   +1 more
doaj   +1 more source

Pesca Demersal en Chile: Eficiencia Técnica y Escalas de Operación. [PDF]

open access: yes
Este trabajo presenta estimaciones de eficiencia técnica en faenas de pesca de barcos industriales que operaron en la década 1990-2000, en la pesquería de merluza común.
Julio Aguirre Montoya   +2 more
core  

Diseño de una ánodo modificado con nanopilares de óxido de zinc y manopartículas de oro para su empleo en celdas fotoelectroquímicas [PDF]

open access: yes, 2014
El tema de investigación que se desarrolló está ligado con el diseño del ánodo de una celda fotoelectroquímica para lograr una mayor eficiencia en la conversión de energía de estos dispositivos.
López Téllez, Gustavo   +1 more
core  

Emergent Relationships Between the Functional Diversity of Marine Planktonic Copepods and Ecosystem Functioning in the Global Ocean

open access: yesGlobal Change Biology, Volume 31, Issue 3, March 2025.
We evaluate how the diversity and functional traits of copepods—tiny crustaceans that constitute the majority of marine zooplankton—relate to key processes in the oceans such as the production of plankton biomass and how it sinks at depth. The study found that a few dominant copepod species disproportionately shape these processes.
Fabio Benedetti   +4 more
wiley   +1 more source

Pautas de la movilidad en el área metropolitana de Madrid [PDF]

open access: yes, 2007
This paper presents the features of mobility in the Community of Madrid. On one hand, the increasing of displacements and flows trends moving to the periphery are stated, which points out a not sustainable mobility.
García Palomares, Juan Carlos   +1 more
core  

Misodendrum punctulatum (Misodendraceae) seed dispersal and colonization patterns on a Nothofagus antarctica (Nothofagaceae) post-fire shrubland from Northwestern Patagonia [PDF]

open access: yes, 2010
El patrón espacial de la dispersión puede afectar el patrón espacial de establecimiento condicionando la estructura de la vegetación. Este trabajo analiza la magnitud de la dispersión y la colonización (infección) de la planta hemiparásita Misodendrum ...
Rovere, Adriana, Tercero Bucardo, Norlan
core   +2 more sources

Simulating the efficacy of wolf–dog hybridization management with individual‐based modeling

open access: yesConservation Biology, Volume 39, Issue 1, February 2025.
In the photo, an introgressed adult wolf–dog in the Northern Apennines, Italy, not far from the city of Bologna. Part of a research program, this male has been sterilized and released back in its own pack with a Global Positioning Collar. Abstract Introgressive hybridization between wolves and dogs is a conservation concern due to its potentially ...
Nina Luisa Santostasi   +4 more
wiley   +1 more source

Dispersão de amostras de latossolo vermelho eutroférrico influenciadas por pré-tratamento para oxidação da matéria orgânica e pelo tipo de agitação mecânica Dispersion of oxisol samples as influenced by pretreatment for organic matter oxidation and by type of mechanical agitation

open access: yesRevista Brasileira de Ciência do Solo, 2008
A dispersão de amostras de Latossolos oxídicos pode ser mais difícil devido a microagregados de alta estabilidade, que nem sempre são totalmente desfeitos pela dispersão química e mecânica.
João Tavares-Filho   +1 more
doaj   +1 more source

Muestreo como un requisito fundamental en las ciencias experimentales (Sampling as a basic requirement in experimental sciences) [PDF]

open access: yes, 2004
Se presentan los fundamentos básicos de muestreo, enfatizando los requisitos para determinar el tamaño óptimo de la muestra. Se discuten el muestreo absoluto y relativo y la comparación entre ellos.
Badii Zabeh, Mohammad Hosein   +3 more
core  

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