Results 71 to 80 of about 333,362 (220)
BMC Plant Biology, 2019 Photosynthetic efficiency might be a key factor determining plant resistance to abiotic stresses. Plants can sense when growing conditions are not favorable and trigger an internal response at an early stage before showing external symptoms.
Yu-Chang Tsai +5 more
semanticscholar +1 more source
Chlorophylls - natural solar cells [PDF]
arXiv, 2011 A molecular modeling study was conducted on a series of six natural occurring chlorophylls. Quantum chemistry calculated orbital energies were used to estimate frequency of transitions between occupied molecular orbital and unoccupied molecular orbital energy levels of chlorophyll molecules in vivo conditions in standard (ASTMG173) environmental ...
arxiv
Journal of Experimental Botany, 2014 Chlorophyll a fluorescence (ChlF) has been used for decades to study the organization, functioning, and physiology of photosynthesis at the leaf and subcellular levels. ChlF is now measurable from remote sensing platforms.
A. Porcar-Castell +8 more
semanticscholar +1 more source
Global and time-resolved monitoring of crop photosynthesis with chlorophyll fluorescence
Proceedings of the National Academy of Sciences of the United States of America, 2014 Significance Global food and biofuel production and their vulnerability in a changing climate are of paramount societal importance. However, current global model predictions of crop photosynthesis are highly uncertain.
L. Guanter +19 more
semanticscholar +1 more source
Representative Pathways of Excitation Migration in Photosystem I [PDF]
Journal of Chemical Physics 119, 1313 (2003), 2002 Photosystem I is a protein-pigment complex that performs photosynthesis in plants, green algae, and cyanobacteria. It contains an aggregate of chlorophylls that absorbs light and delivers the resulting electronic excitation to the special pair of chlorophylls where the excitation energy is used for producing charge separation across the cell membrane ...
arxiv
Biologically inspired graphene-chlorophyll phototransistors with high gain [PDF]
arXiv, 2013 We present prominent photoresponse of bio-inspired graphene-based phototransistors sensitized with chlorophyll molecules. The hybrid graphene-chlorophyll phototransistors exhibit a high gain of 10^6 electrons per photon and a high responsivity of 10^6 A/W, which can be attributed to the integration of high-mobility graphene and the photosensitive ...
arxiv
Upstream Causes of Downstream Effects [PDF]
, 2017 The United States Environmental Protection Agency considers nutrient pollution in stream ecosystems one of the U.S. most pressing environmental challenges. But limited independent replicates, lack of experimental randomization, and space- and time-varying confounding handicap causal inference on effects of nutrient pollution. In this paper the causal g-
arxiv +1 more source
Acta Botânica Brasílica, 2004 It is an endangered tree fern that grows in mixed umbrophylus forests in the tropics. Sterilized spores were germinated at 25 ± 2ºC under a 16-hour photoperiod, in Dyer and MS medium supplemented with 0 to 5% sucrose.
Gladys Daniela Rogge Renner +1 more
doaj +1 more source
Journal of Experimental Botany, 2004 Chlorophyll fluorescence has been routinely used for many years to monitor the photosynthetic performance of plants non-invasively. The relationships between chlorophyll fluorescence parameters and leaf photosynthetic performance are reviewed in the ...
N. Baker, E. Rosenqvist
semanticscholar +1 more source
Integrated studies of the response of the photosynthetic apparatus of the Siberian spruce (Picea obovata Ledeb.) to the effects of UV-B radiation [PDF]
Журнал Сибирского федерального университета: Серия Биология, 2010 The nature of the effect of ultraviolet radiation on the physiological processes of plants depends on the wavelength, intensity and the duration of the exposure.
Vladimir V. Zuev +4 more
doaj