Abstract
Abstract Curve resolution into Gaussian components of the absorption spectra during the varying stages of the Shibata shift in dark grown, irradiated leaves of barley indicates that the chlorophyll a forms formed after irradiation consist of the same main components which have been reported to be present in all hitherto investigated plant materials (peak values in the red region 662, 670, 677 and 683 nm, respectively) but in varying proportions. The spectra during the Shibata shift proper can be satisfied by a mixture of two single components gradually changing their proportions, although a four component system gives a still better fit to the measured absorption curves. It is also shown that curves taken before and after the shift and added together in the appropriate proportions will match the absorption spectrum measured with peak at the isosbestic point (after ca. 15 min at room temperature).
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Claims 4
Claim · model-written summary
Irradiated barley leaves contained four main chlorophyll a spectral components with red peaks at 662, 670, 677 and 683 nm in varying proportions.
- Taxon
- barley
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Hordeum vulgaree0 - Organ / stage
- leavese0
- Treatment
- irradiatede0
- Outcome
- chlorophyll a forms formed after irradiatione0
- Value
- 662, 670, 677 and 683 nme0
- Qualifier
- varying proportionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“dark grown, irradiated leaves of barley indicates that the chlorophyll a forms formed after irradiation consist of the same main components which have been reported to be present in all hitherto investigated plant materials (peak values in the red region 662, 670, 677 and 683 nm, respectively) but in varying proportions.”
Claim · model-written summary
A two-component mixture with changing proportions fits the spectra during the Shibata shift.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- spectra during the Shibata shift propere0
- Value
- two single componentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spectra during the Shibata shift proper can be satisfied by a mixture of two single components gradually changing their proportions”
e1“leaves of barley”
Claim · model-written summary
A four-component system fits measured absorption curves better.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- fit to the measured absorption curvese0
- Direction
- bettere0
- Value
- four component systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although a four component system gives a still better fit to the measured absorption curves.”
e1“leaves of barley”
Claim · model-written summary
Weighted pre- and post-shift curves match the spectrum at the isosbestic point after about 15 minutes.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- match the absorption spectrum measured with peak at the isosbestic pointe0
- Value
- ca. 15 mine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“curves taken before and after the shift and added together in the appropriate proportions will match the absorption spectrum measured with peak at the isosbestic point (after ca. 15 min at room temperature).”
e1“leaves of barley”