Low‐Temperature Emission Spectrum of O2—in Alkali Halides

1964 ◽  
Vol 40 (6) ◽  
pp. 1664-1670 ◽  
Author(s):  
J. Rolfe
Keyword(s):  
Low Temperature ◽  
Emission Spectrum ◽  
Alkali Halides

Spectroanalytical Parameters of Fungal Metabolites. IV. Moniliformin

1974 ◽  
Vol 57 (6) ◽  
pp. 1392-1396 ◽  
Author(s):  
J A Lansden ◽  
R J Clarkson ◽  
W C Neely ◽  
R J Cole ◽  
J W Kirksey
Keyword(s):  
Low Temperature ◽  
Aqueous Solutions ◽  
Ambient Temperature ◽  
Emission Spectrum ◽  
Potassium Salt ◽  
Emission Spectra ◽  
Fungal Metabolites ◽  
Fungal Metabolite ◽  
Fluorescence Excitation ◽  
Phosphorescence Emission

Abstract The spectral data for a novel fungal metabolite, moniliformin (potassium salt of 1-hydroxycyclobut- 1-ene-3,4-dione), are reported. The corrected ambient temperature fluorescence excitation and emission spectra are given and the quantum efficiency is calculated to be 5.32 × 10舓3. The uncorrected low temperature phosphorescence emission spectrum and lifetime are also reported. Other physical data are given to support spectral evidence that the molecule exists as a dimer in aqueous solutions.

Low-temperature behavior of alkali halides doped with hydroxyl

1983 ◽  
Vol 52 (1-2) ◽  
pp. 115-135 ◽  
Author(s):  
D. Moy ◽  
R. C. Potter ◽  
A. C. Anderson
Keyword(s):  
Low Temperature ◽  
Alkali Halides ◽  
Temperature Behavior

Micro-Inactivation of Coliforms by Low-Temperature and Atmospheric-Pressure Plasma Irradiation

2015 ◽  
Vol 749 ◽  
pp. 74-78
Author(s):  
Hideyuki Takahashi ◽  
Satoshi Kurumi ◽  
Kaoru Suzuki ◽  
Katsushi Nishimura ◽  
Hideharu Hirose ◽  
...  
Keyword(s):  
Low Temperature ◽  
Emission Spectrum ◽  
Atmospheric Pressure ◽  
Oral Surgery ◽  
Irradiation Time ◽  
Atmospheric Pressure Plasma ◽  
Positive System ◽  
Plasma Irradiation ◽  
Pressure Plasma ◽  
Peak Intensity

In this study, we report on the inactivation technique to apply the oral surgery by micro low-temperature and atmospheric-pressure plasma irradiation utilizing a capillary nozzle. Emission spectrum of the micro-plasma showed OH and O radical, which were affected inactivation of coliform. Vibration temperature of the micro-plasma with 7998 K was calculated from peak-intensity at emission due to N22nd positive system. Inactivation region was larger than plasma irradiation spot, and it was increasing with plasma irradiation time.

Fluorescence and Photochemical Properties of Plants with Defective Photosystem II

1980 ◽  
Vol 35 (5-6) ◽  
pp. 461-466 ◽  
Author(s):  
Wilhelm Menke ◽  
Georg H. Schmid
Keyword(s):  
Low Temperature ◽  
Photosystem Ii ◽  
Emission Spectrum ◽  
Photosystem I ◽  
Room Temperature ◽  
Fluorescence Emission ◽  
Fluorescence Emission Spectrum ◽  
Wild Type ◽  
Fully Functioning ◽  
Fluorescence Energy

Abstract The mykotrophic orchid Neottia nidus-avis does not evolve oxygen in the light but is able to perform photophosphorylation. The low temperature fluorescence emission spectrum lacks the 680 and 690 nm bands. Hence, the spectroscopic chlorophyll a forms which are attributed to photosystem II do not occur in plastids of this orchid. The low temperature excitation spectrum of photosystem I fluorescence exhibits a maximum at 666 nm. The position of this maximum appears not to be influenced by energy transfer and corresponds to the absorption maximum of the chlorophyll form which emits the photosystem I fluorescence. Energy migration, however, occurs from carotenoids whose absorption spectrum is shifted to longer wavelengths and which cause the yellow-brown color of the Neottia plastids. Room temperature fluorescence emission shows after the onset of light no variable part. Despite the fact that plastids of the tobacco mutant NC 95 at most evolve only traces of oxygen the low temperature emission spectrum shows the three bands which are usually observed with fully functioning chloroplasts. However, the two bands at 680 and 690 nm are distinctly lower than with the wild type. The variable portion of room temperature fluorescence is barely detectable. In line with the very low capacity for oxygen evolution, rates of electron transport partial reactions in the region of photosystem II are extremely low. In agreement with this observation no 690 nm absorption change signal is detected. However, a normal P+700 signal is seen. In the presence of electron donors like reduced phenazine methosulfate the decay time of the P+700 signal is faster than with the wild type. The yellow tobacco mutant Su/su var. aurea which exhibits at high light intensities higher rates of photosynthesis than the wild type shows at low temperature an emission spectrum with stronger photosystem II bands than the wild type.

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