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The influence of red light in altering the phototropic sensitivity of corn coleoptiles (Zea mays L., cultivar Burpee Barbecue Hybrid) is compared with the spectrophotometric status of the phytochrome they contain. The distribution of measurable phytochrome corresponds roughly with the distribution of sensitivity to red light for physiological change. Both(More)
The effect of red light in alteration of the phototropic sensitivity of corn coleoptiles (Zea mays L., cultivar Burpee Barbecue Hybrid) is investigated. Phototropic dosage-response curves for etiolated coleoptiles are compared with those for coleoptiles receiving 1 hour of continuous red light immediately prior to phototropic induction. In the former case,(More)
When spin label is added to Chlamydomonas the organism is apparently unaffected, but the paramagnetic resonance signal of the spin label decreases. Irradiation with visible light greatly accelerates this decrease, which is partially reversible. If the cells are grown in the presence of the spin label and washed well, no spin label signal is detectable.(More)
An optically accessible pyrolysis reactor was developed to analyze the in-situ reaction of biomass feedstock during the initial stage of fast pyrolysis. A Fourier Transform Infrared (FTIR) Spectroscopy, analytical instrument was modified to allow the light source to pass through the optical pyrolysis reactor for time-resolved measurements during the(More)
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