Results 41 to 50 of about 1,098,319 (273)

El coeficiente de eficacia del humo de sílice

open access: yesMateriales de Construccion, 1999
Silica fume is a pozzolanic addition specially used to get high resistance concrete. Present Spanish standards on additives dictate that silica fumes have to comply with specific requirements when used as concrete addition.
M. Pilar Alaejos Gutiérrez   +1 more
doaj   +1 more source

Estructuras sedimentarias primarias [PDF]

open access: yes, 1984
Depto. de Geodinámica, Estratigrafía y PaleontologíaFac.
Dabrio, Cristino J.
core  

Synergistic efforts in specimen digitisation, curation and cataloguing of Brazil's megadiverse flora and funga

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
The advancement of digital technologies has brought a rapid global information exchange, impacting all areas of our lives. This also applies to science. Knowledge, conservation and scientific innovation on global biodiversity are being strengthened and disseminated at unprecedented scales.
Ana Flávia Alves Versiane   +9 more
wiley   +1 more source

Estructura del lenguaje y estructura del mundo

open access: yesEstudios de lingüística del español, 2021
JUAN DE DIOS Luque Durán, Aspectos universales y particulares del léxico de las lenguas del ...
openaire   +5 more sources

Estructuras desplegables aéreas. Casos de estudio y propuesta de refugio = Aerial deployable structures. Case studies and shelter proposal

open access: yesArte, Diseño e Ingeniería, 2023
Las estructuras desplegables han sido ampliamente utilizadas en el terreno de la arquitectura efímera, más concretamente en el campismo. La aparición en 2003 de la tienda “2seconds” marca un hito en la cultura popular.
Paula Álvarez-Garcia, Manuel Domínguez
doaj   +1 more source

How digitisation of herbaria reveals the botanical legacy of the First World War

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Digitisation of herbarium collections is bringing greater understanding to bear on the complexity of narratives relating to the First World War and its aftermath – scientific and societal. Plant collecting during the First World War was more widespread than previously understood, contributed to the psychological well‐being of those involved and ...
Christopher Kreuzer, James A. Wearn
wiley   +1 more source

Modificación de Betún-Venezuela por reacción de Friedel y Crafts

open access: yesMateriales de Construccion, 1987
In this work, a Venezuelan-bitumen of newtonian nature was modified by Friedel and Crafts reaction, changing it in new materials that present pseudoplastic characteristics, with very different properties from the original product. These new materials are
Manuel Blanco   +2 more
doaj   +1 more source

Influencia de la aplicación de la norma G050 en el clima de seguridad de las obras de construcción del distrito de Surquillo

open access: yesRevista del Instituto de Investigación de la Facultad de Minas, Metalurgia y Ciencias Geográficas, 2020
La presente investigación tiene como objeto estudiar la relación entre la aplicación de la norma G050 (variable independiente) y el clima de seguridad de las obras de construcción del distrito de Surquillo (variable dependiente). La metodología utilizada
Edson Del Águila Guerrero
doaj   +1 more source

Hurdles to overcome to achieve biostimulant‐driven, low chemical input crop production

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Crop production requires considerable chemical inputs that result in significant greenhouse gas emissions and other environmental costs. Biostimulants are natural agents, such as microorganisms or seaweed, applied to plants and soil to stimulate plant growth and reduce chemical inputs. Biostimulant use is rapidly increasing globally, but hurdles remain,
Wolfram Buss   +6 more
wiley   +1 more source

A framework linking silicon fertilisation, plant silicification and soil carbon cycling

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Soil organic carbon (SOC) is vital for soil health, food security, and climate change mitigation. We reviewed how silicon (Si) fertilisers, commonly used to improve plant health, may also influence SOC dynamics. We developed a framework linking Si and SOC and discussed the possibility of Si‐mediated plant changes contributing to SOC sequestration.
Xuqing Li   +2 more
wiley   +1 more source

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