Search results for "Light"

La préservation de l'environnement nocturne : les enjeux d'une controverse sociotechnique

2013

This communication explains the birth of an environmental problem, light pollution, understood as a socio-technical controversy. Over forty years, in support of the actor-network approach, it traces the conditions of its emergence, transformation and dissemination to local, national and transnational levels, and through various professional disciplines. Schematically, "environmentalists" uphold a holistic approach of "nocturnité" and define artificial light as a pollutant. Facing them, the "technicist" defend a segmented approach and define artificial light as a nuisance. The implementation of this controversy on the political agenda leads to institutional decisions that grasp it with diffi…

(Ré)concilier éclairage urbain et environnement nocturne : les enjeux d’une controverse sociotechnique

2014

International audience; Our paper explains the birth of an environmental problem, i.e. light pollution, viewed as a socio-technical controversy. Supported by the actor-network approach, it traces over forty years the conditions of its emergence, transformation and dissemination to local, national and transnational levels and through various professional disciplines. Schematically, “environmentalists” uphold a holistic approach of “nocturnality” and define artificial light as a pollutant. Facing them, the “technicist” defends a segmented approach and defines artificial light as a nuisance. The introduction of this controversy into the political agenda leads to institutional decisions that gr…

Modulating the self-assembly of thermosensitive block copolymers by selective cyclodextrins

2009

Regio- and Stereoselective Chloro Sulfoximidations of Terminal Aryl Alkynes Enabled by Copper Catalysis and Visible Light

2021

Advanced synthesis & catalysis 2552-2556 (2021). doi:10.1002/adsc.202100162

The room temperature crystal structure of a bacterial phytochrome determined by serial femtosecond crystallography

2016

Scientific reports 6, 35279 (2016). doi:10.1038/srep35279

Josefa Amar y Borbón (1749–1833):

2023

Este texto ofrece un extracto y sugerencias didácticas para indagar, desde un punto de vista histórico, cómo se construyen los cuerpos generizados. El texto elegido es la introducción de una obra pedagógica de la escritora española Josefa Amar y Borbón (1749-1833), el Discurso sobre la educación física y moral de las mujeres, libro publicado en Madrid en 1790. Este pasaje revelador de un texto del siglo XVIII, poco conocido fuera del ámbito académico, descubre los orígenes de las nociones del cuerpo generizado, socialmente moldeado y performativo, conectando la investigación histórica con los debates y temas de interés del presente. Horizon 2020/ERC-2017-Advanced Grant-787015 This text offe…

Tautas apgaismības idejas latviešu laicīgajā literatūrā 18.gs. otrajā pusē un 19.gs. sākumā

2013

Elektroniskā versija nesatur pielikumus

'Dark Ecological Network': strategically tackling light pollution for biodiversity and people

2021

Night-time light pollution from artificial sources can disrupt biological processes and fragment habitats. This study presents a new concept foraddressing the problem: a 'dark ecological network'. Its development involves mapping a new system of connected functional zones and corridors where dark can be preserved to help birds, bats and other taxa, and gives people the chance to experience starry skies.

Light induces expression of a dehydrin-encoding gene during seedling de-etiolation in sunflower (Helianthus annus L.)

2007

The effects of light quality on the expression of a sunflower dehydrin-encoding gene, HaDhn1, were studied during seedling de-etiolation. Seeds were germinated in the dark and, after 5 days, seedlings were maintained well watered and de-etiolated under different lights for 3, 6, 12, and 24h. Exposure to white light stimulated HaDhn1 transcript accumulation in the cotyledons of these seedlings, contrary to seedlings grown in the dark. HaDhn1 transcripts increased also treating plantlets with monochromatic lights, especially red light. The increase of HaDhn1 transcripts is provoked by the formation of the active form of phytochrome. Further experiments, performed saturating active phytochrome…

Curiosités à la Colette, czyli o osobliwościach i niezwykłościach codzienności

2016

Twórczość Sidonie-Gabrielle Colette jawi się jako swoisty gabinet osobliwości. Owe niezwykłości to kurioza związane z tajemnicami natury, przedmiotami codziennego użytku, a także sferą doznań, które wpływają na poznawanie oraz smakowanie życia. W niniejszym artykule kurioza rozumiane są w kategoriach fascynacji, stanu emocjonalnego, wynikającego z odkrywania, podziwiania nowych rzeczy lub osób, a także rozkoszowania się różnorodnością doświadczeń i możliwości przekraczania tabu. Niezwykle interesujące wydaje się w tym aspekcie „pożądanie skarbów”, które implikuje specyficzne upojenie lub ekscytację rzeczywistością. Ukazanie odmienności świata pozwala przeżyć zachwyt - odczuwany wszystkimi z…