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Estimating biomass of rice in farmers' fields by red-edge indices
2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), 2014Biomass is an important parameter that has a decisive influence on the final yield. Destructive measurements of biomass are time-consuming and labor-intensive. Proximal sensing methods using field spectrometers offer indirect observation and estimation of biomass.
Martin Leon Gnyp +3 more
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Non-exponential decay of indole fluorescence — the red-edge effect
Biochemical and Biophysical Research Communications, 1974Abstract The fluorescence of indole in glycerol decays exponentially at both 22° and −80°C for 280 nm excitation. Under 296 nm excitation the 22°C emission decay is exponential, but at −80°C, a second shorter lived (1.3 ns) component is also detected. The relevance of this result to the determination of protein fluorescence lifetime is described.
C, Conti, L S, Forster
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Application of red edge variables in winter wheat nutrition diagnosis
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004Remote sensing offers the potential to determine rapidly the physiological condition of crop over large areas. Canopy reflectance data selected at key growth stages of winter wheat were analyzed. It indicated that winter wheat growth phonological changes can be evaluated by red edge variables (REV) characteristics.
Wenjiang Huang +5 more
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Red-edge excitation fluorescence spectroscopy of proteins in reversed micelles
Journal of Protein Chemistry, 1994The dependence of fluorescence emission maxima of L-tryptophan and single-tryptophan-containing proteins (ribonuclease T1, melittin, and parvalbumin) on excitation wavelength has been studied in reversed micelle systems of sodium bis(2-ethyl-1-oxyl) sulfosuccinate (AOT).
A, Guz, Z, Wasylewski
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Tubulin Conformation and Dynamics: A Red Edge Excitation Shift Study
Biochemistry, 1996The fluorescence emission maximum of a polar fluorophore in viscous medium often shows a dependence on excitation wavelength, a phenomenon which is named red edge excitation shift (REES). We have found that the fluorescence spectra of the tubulin tryptophans exhibit a REES of about 7 nm.
S, Guha +3 more
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Red edge structure of canopy reflectance spectra of triticale
Remote Sensing of Environment, 1993Abstract Reflectance spectra at the boundary between the visible and near-infrared reflectance in the domain of the socalled “red edge” (660–770 nm) were examined over triticale canopy in a two-factor field experiment. The objective w was to study changes in the red edge position and shape as a function of developmental stage, cultivar, and plant ...
V.Ya. Railyan, R.M. Korobov
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Seasonal patterns in leaf reflectance red-edge characteristics
International Journal of Remote Sensing, 1991Abstract Leaves from ten tree species, including three conifers from a woodlot in southern Ontario were sampled at weekly intervals for a period of 150 days spanning the phenological events in deciduous trees of leaf development and expansion (flushing), leaf maturity and leaf senescence.
J.R. MILLER +4 more
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The red edge parameters as indicators of rice nitrogen levels
SPIE Proceedings, 2003The canopy spectra of rice under different nitrogen levels were studied. Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude and area of the red edge peak) were used to evaluate rice leaf chlorophyll, LAI. Red edge positions move to longer wave bands till booting stage and move to short bands after booting stage. A
Jingfeng Huang +2 more
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Site-selective Red-Edge effects.
Methods in enzymology, 2009Observation of Red Edge effects is the basis of unique methodology that allows combination of site-photoselection with dynamics of molecular relaxations. The important dynamic information on molecular level can be obtained even by simple recording of steady-state fluorescence using the lifetime as the time marker.
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Red-edge-excitation fluorescence spectroscopy of single-tryptophan proteins
European Biophysics Journal, 1988With the aim of finding non-equilibrium dipole-relaxational electronic excited states of tryptophan residues in proteins the dependence of the fluorescence emission maximum on excitation wavelength was studied for several proteins containing a single tryptophan residue per molecule.
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