Results 1 to 10 of about 580 (135)

Tree Diversity Increases Carbon Stocks and Fluxes Above-But Not Belowground in a Tropical Forest Experiment. [PDF]

open access: yesGlob Chang Biol
We examined the potential of mixed‐species planted forests compared to monospecific forests to act as a nature‐based solution to climate change mitigation through carbon sequestration. By analysing multiple carbon stocks and fluxes over 16 years in the world's oldest tropical tree diversity experiment, we found that planted forests with five tree ...
Schnabel F   +19 more
europepmc   +2 more sources

Photochemically Induced Propulsion of a 4D Printed Liquid Crystal Elastomer Biomimetic Swimmer. [PDF]

open access: yesAdv Sci (Weinh)
4D printing of azobenzene‐containing liquid crystal elastomers (LCEs) actuating at low temperatures close to room temperature is demonstrated. Elastomer irradiation with moderate‐intensity ultraviolet light leads to fast photodeformation underwater indicating predominant photochemical response.
Sartori P   +4 more
europepmc   +2 more sources

CARACTERIZACIÓN QUÍMICA DE LA MATERIA ORGÁNICA NATURAL DEL RÍO PASTO

open access: yesRevista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 2023
Este trabajo muestra los aspectos más relevantes relacionados con la primera caracterización química de la materia orgánica natural del río Pasto. Para este propósito, fue necesario el uso de técnicas de análisis instrumental moderno tales como la ...
Milton Rosero Moreano   +3 more
doaj   +1 more source

Correlação entre a capacidade de troca de cátions e outras propriedades de três solos da Amazônia Central [PDF]

open access: yesActa Amazonica, 1988
Foi determinada a capacidade de troca de cations a pH natural do solo e a pH 7,0 ao longo do perfil de três solos da Amazônia Central e correlaeionou-se os valores de CTC encontrados com outras características intrínsecas de cada solo, tais como: matéria
Sônia Sena Alfaia
doaj   +1 more source

Long-term effect of no-tillage on soil organic matter fractions in rainfed Aragon (NE Spain) Efecto a largo plazo del no laboreo sobre fracciones de materia orgánica del suelo en agrosistemas de secano en Aragón (NE España) Efeito a longo prazo do plantio direto em frações de matéria orgânica do solo no sequeiro de Aragon (NE Espanha) [PDF]

open access: yesSpanish Journal of Soil Science, 2011
<p style="text-align: justify;">This paper assesses the long-term effect of no-tillage (NT) on soil organic carbon (OC) content and its distribution among different organic matter fractions in rainfed agrosystems of Aragón (NE Spain ...
Nuria Blanco-Moure   +3 more
doaj   +1 more source

Chiral Single‐Molecule Potentiometers Based on Stapled ortho‐ Oligo(phenylene)ethynylenes

open access: yesAngewandte Chemie, Volume 135, Issue 16, April 11, 2023., 2023
A stapled chiral helical single‐molecule potentiometer based on ortho‐oligophenylethynylene skeleton is described. Its stretching during STM measurements promotes different conductive pathways, attributed to different conformations of the helical scaffold, while maintaining the helicity. State of the art calculations on polarization pave the way to use
Ana M. Ortuño   +14 more
wiley   +2 more sources

Arte y Ciencia para un Paisaje en Crisis: Caso de Estudio del Proyecto Cartografías de la Metamorfosis

open access: yesBRAC, 2021
A partir del método de cristalización sensible de Erhenfried Pfeiffer, el proyecto artístico Cartografías de la metamorfosis expone la vitalidad, en forma de grafismos mandálicos, de los diferentes productos hortícolas del Campo de Cartagena, un método ...
Pedro Ortuño
doaj   +1 more source

Efeito de sistemas de cultivo na estabilidade de agregados de um Latossolo Vermelho-Amarelo em Querência, MT [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2002
Avaliou-se o efeito de diferentes sistemas de cultivo na estabilidade de agregados em água de um Latossolo Vermelho-Amarelo de textura média, no Município de Querência, Mato Grosso.
José Carlos Corrêa
doaj   +1 more source

Highly Efficient Photoninitiators Based on 4H‐Pyranylidene Derivatives for Two‐Photon Laser Printing

open access: yesAdvanced Materials Technologies, Volume 8, Issue 23, December 13, 2023., 2023
4H‐pyranylidene derivatives with a donor–acceptor–donor structure are studied as photoinitiators for two‐photon laser printing, showing a better performance than the benchmark BAPO. Abstract A series of four donor–acceptor–donor derivatives bearing 4H‐pyranylidene and 4‐methylcyclohexan‐1‐one units as donor and acceptor groups respectively is designed,
Raquel Royo   +6 more
wiley   +1 more source

Could a trade agreement strengthen the enforcement of domestic environmental laws? Envisioning the impacts of the US–Peru environmental submissions mechanism

open access: yesReview of European, Comparative &International Environmental Law, Volume 32, Issue 3, Page 465-472, November 2023., 2023
Abstract Could a trade agreement strengthen the enforcement of domestic environmental laws? This article explores this question in the context of the US–Peru Trade Promotion Agreement (TPA). The article examines, in particular, the potential role of the Secretariat for Submissions on Environmental Enforcement Matters (SEEM) of the TPA.
Pablo Peña
wiley   +1 more source

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