Results 21 to 30 of about 783,043 (296)

Generating Light from Darkness

open access: yesJoule, 2019
Summary A large fraction of the world’s population still lacks access to electricity, particularly at night when photovoltaic systems no longer operate. The ability to generate electricity at night could be a fundamentally enabling capability for a wide ...
A. Raman, Wei Li, S. Fan
semanticscholar   +1 more source

Grasping darkness: the dark ecological network as a social-ecological framework to limit the impacts of light pollution on biodiversity

open access: yesEcology and Society, 2021
Artificial light at night (ALAN) is nowadays recognized as a major anthropogenic pressure on the environment on a global scale and as such is called light pollution.
Samuel Challéat   +8 more
doaj   +1 more source

Dark Atoms and Dark Radiation [PDF]

open access: yesAdvances in High Energy Physics, 2014
K.Belotsky1,2, J.-R. Cudell3, M. Khlopov1,2,4, C. Kouvaris5 1 National Research Nuclear University MEPHI (Moscow Engineering Physics Institute), 115409 Moscow, Russia 2 Centre for Cosmoparticle Physics ”Cosmion” 115409 Moscow, Russia 3 IFPA, Dep. AGO, Universite de Liege, Sart Tilman, 4000 Liege, Belgium 4 APC laboratory 10, rue Alice Domon et Leonie ...
Maxim Khlopov   +3 more
openaire   +3 more sources

Dark group: dark energy and dark matter [PDF]

open access: yesPhysics Letters B, 2004
We study the possibility that a dark group, a gauge group with particles interacting with the standard model particles only via gravity, is responsible for containing the dark energy and dark matter required by present day observations. We show that it is indeed possible and we determine the constrains for the dark group.
openaire   +2 more sources

Dark energy and dark matter [PDF]

open access: yesPhysics Letters B, 2003
4 pages latex, 2 ...
COMELLI, DANIELE   +2 more
openaire   +3 more sources

Overexpression of 7-hydroxymethyl Chlorophyll a Reductase from Cucumber in Tobacco Accelerates Dark-Induced Chlorophyll Degradation

open access: yesPlants, 2021
7-hydroxymethyl chlorophyll (Chl) a reductase (HCAR) plays critical roles in the Chl cycle and degradation during leaf senescence, however, its function in horticultural crops remains unknown.
Weikang Liu   +6 more
doaj   +1 more source

DARK ENERGY WITH DARK SPINORS [PDF]

open access: yesModern Physics Letters A, 2010
Ever since the first observations that we are living in an accelerating universe, it has been asked what dark energy is. There are various explanations, all of which have various drawbacks or inconsistencies. Here we show that using a dark spinor field it is possible to have an equation of state that crosses the phantom divide, becoming a dark phantom
Boehmer, Christian G., Burnett, James
openaire   +2 more sources

PCC-like induction of mitosis in Chara vulgaris antheridia initiating differentiation of spermatozoids in the darkness

open access: yesActa Societatis Botanicorum Poloniae, 2014
The objects of this research were the antheridial filament cells of Chara vulgaris which after 5-day mitodepressing treatment of the darkness reactivated mitosis (without light stimulation) in the result of the physiological state evocing the initiation ...
Maria Kwiatkowska
doaj   +1 more source

"There's going to be a moon tonight": Images of light and darkness as symbolic elements in Ernest Hemingway's In our time [PDF]

open access: yesZbornik Radova Filozofskog Fakulteta u Prištini, 2023
This paper aims at exploring and analysing the presence and significance of images of light and darkness as symbolic elements in the short story collection In Our Time by Ernest Hemingway.
Surla Milica B.   +1 more
doaj   +1 more source

The circadian clock and darkness control natural competence in cyanobacteria

open access: yesNature Communications, 2019
The cyanobacterium Synechococcus elongatus is a model organism for the study of circadian rhythms. It is naturally competent for transformation—that is, it takes up DNA from the environment, but the underlying mechanisms are unclear.
A. Taton   +6 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy