Results 71 to 80 of about 801,404 (300)

SATELLITE FLUORESCENCE AS A MEASURE OF OCEAN SURFACE CHLOROPHYLL

open access: yesGayana, 2004
Both the MODIS optical sensors on the NASA Aqua and Terra spacecraft and the MERIS instrument on the ESA Envisat measure spectral radiance in bands designed to allow detection of the fluorescence signal from surface chlorophyll in sea water, stimulated ...
Jim Gower, Stephanie King
doaj  

The Effect of Sugar Beet Broadleaf Herbicides on Fluorescence Induction Curves in Amaranthus retroflexus L. and Portulaca oleracea L.

open access: yesNotulae Scientia Biologicae, 2017
Chlorophyll fluorescence analysis is a simple and rapid method for detecting herbicide effects after a short time following their application in photosynthetic apparatus in plants.
Ali Asghar CHITBAND   +3 more
doaj   +1 more source

Study of chlorophyll photoresistance in different matrices

open access: yes, 2022
reservedThe thesis project focus on the study of the photo-physical properties of Chlorophyll in different environments: Chlorophyll embedded in WSCP protein (Water-Soluble Chlorophyll Protein), known for its ability to protect the pigment from ...
ZATTA, SAMUEL
core  

Chlorophyll fluorescence emission spectrum inside a leaf [PDF]

open access: yes, 2008
Chlorophyll a fluorescence can be used as an early stress indicator. Fluorescence is also connected to photosynthesis so it can be proposed for global monitoring of vegetation status from a satellite platform.
Jacquemoud, Stéphane   +4 more
core   +1 more source

Enriched Soil Organic Carbon Underpins Long‐Term Stable Crop Productivity Across China's Croplands

open access: yesAdvanced Science, EarlyView.
Quantifying the nonlinear relationships and causal effects of soil organic carbon (SOC) on crop stability reveals specific critical thresholds and saturation points. This partitions the national SOC spectrum into three functional phases. Integrating these spatial delineations with high‐resolution maps of marginal gains pinpoints regions with the ...
Yuyang Huang   +11 more
wiley   +1 more source

Living Electronics: Microbial Metabolism as Batteries, Resistors, and Capacitors

open access: yesAdvanced Electronic Materials, EarlyView.
Three microorganisms are assigned the three elementary roles of a circuit on one sheet of paper. Dormant Bacillus subtilis spores germinate to switch the power source on; a photosynthetic Synechocystis biofilm sets resistance by the color and intensity of light; and a respiring Shewanella oneidensis biofilm stores charge. Together they form a printable
Botian Wang, Ruohan Zhang, Seokheun Choi
wiley   +1 more source

AI‐Enabled RGB Light‐to‐Frequency Sensor for Nondestructive Salinity Stress Monitoring in Medicinal Plants

open access: yesAdvanced Intelligent Systems, EarlyView.
A distributed wireless sensing framework enables noninvasive monitoring of plant salinity stress through leaf reflectance measurements acquired with portable optical sensors. The collected data are processed using TinyML‐based neural network models deployed at the edge, enabling accurate, real‐time, and low‐cost classification of salinity levels, while
Ali Ahmad   +4 more
wiley   +1 more source

Chlorophyll Fluorescence

open access: yes, 2018
Light energy absorbed by chlorophyll molecules in a leaf can undergo one of three fates: used to drive photosynthesis (photochemistry); excess energy can be dissipated as heat; re‐emitted as light—chlorophyll fluorescence.
Ntatsi Georgia, Savvas Dimitrios
core   +1 more source

Exposure to heat waves and drought improves subsequent leaf heat tolerance for five oak species in southern California

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Given the threats of climate change, we investigated the impact of high temperatures separately and in combination with reduced soil water on leaf heat tolerance for five oaks (Fagaceae) with overlapping ranges in southern California, USA: Quercus agrifolia and Q. chrysolepis (evergreen species), Q. douglasii and Q.
Casey D. Wisely   +7 more
wiley   +1 more source

Using leaf chlorophyll fluorescence for in-season diagnosing herbicide resistance in Echinochloa species at reproductive growth stage

open access: yesPlant Protection Science, 2018
The chlorophyll fluorescence measurement to diagnose herbicide resistant Echinochloa species at the reproductive (late) growth stage was applied. The significant correlation between Fv/Fm (chlorophyll fluorescence measurements) and fresh weight (whole ...
Chuan-Jie Zhang, Do-Soon Kim
doaj   +1 more source

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