Unimolecular decay paths of electronically excited species. II. The C2H+4ion

1981 ◽  
Vol 74 (4) ◽  
pp. 2402-2411 ◽  
Author(s):  
C. Sannen ◽  
G. Raşeev ◽  
C. Galloy ◽  
G. Fauville ◽  
J. C. Lorquet
Keyword(s):  
Excited Species ◽  
Electronically Excited

Unimolecular decay paths of electronically excited species. VI. The Ã2E state of NH+3

1985 ◽  
Vol 82 (9) ◽  
pp. 4073-4075 ◽  
Author(s):  
C. Krier ◽  
M. Th. Praet ◽  
J. C. Lorquet
Keyword(s):  
Excited Species ◽  
Electronically Excited

scholarly journals Electronically Excited Species

Nature ◽  
1958 ◽  
Vol 181 (4605) ◽  
pp. 320-321
Author(s):  
J. W. LINNETT
Keyword(s):  
Excited Species ◽  
Electronically Excited

Generation of electronically excited species during enzymatic oxidation of chlorpromazine and related compound

1985 ◽  
Vol 130 (3) ◽  
pp. 952-956 ◽  
Author(s):  
Minoru Nakano ◽  
Katsuaki Sugioka ◽  
Hiroko Nakano ◽  
Choichi Takyu ◽  
Humio Inaba
Keyword(s):  
Related Compound ◽  
Enzymatic Oxidation ◽  
Excited Species ◽  
Electronically Excited

From free radicals to electronically excited species

1995 ◽  
Vol 19 (1) ◽  
pp. 103-114 ◽  
Author(s):  
Giuseppe Cilento ◽  
Waldemar Adam
Keyword(s):  
Free Radicals ◽  
Excited Species ◽  
Electronically Excited

scholarly journals Lyoluminescence Dosimetry of L-Proline Incorporated of Sensitizer Dependence on the Temperature and pH of Solution

2019 ◽  
pp. 2156-2162
Author(s):  
Qahtan Adnan Abdulqader ◽  
Ammar Mohammed Alhasan
Keyword(s):  
Free Radicals ◽  
Amino Acid ◽  
Gamma Rays ◽  
The Self ◽  
Solid Matrix ◽  
Extra Energy ◽  
Excited Species ◽  
Electronically Excited ◽  
The Stability ◽  
Dosimeter Material

To increase the sensitivity of dosimeter, it has to improve the properties that are required to increase its sensitivity. It was proven that the dependence of lyoluminscence (LL) of irradiated amino acid (L-prolin) incorporated with chemiluminscence reagent (luciginine) on the pH and temperature of the solution. LL means the emission of light from dissolved material in a suitable solvent, which is previously exposed to ionizing radiation. When the incorporated phosphor irradiated to gamma rays an electronically excited species are trapped within the solid matrix, this extra energy will be emitted in the form of light (  420-500nm), on dissolving the material in water in this test. The LL intensity increases with increasing pH of the solution. The best reproducible and optimum LL intensity is at (pH=8.5-9) of the solution, However, LL intensity will be decreased when the PH is higher than 12. In this value of pH the stability of free radicals is optimum. The same is found for solvent temperature dependence, the optimum LL intensity is at 45-48 oC. LL intensity will increase up to 70 oC,it was found that the total glow increased because of increasing the self-glow of luciginine , but LL intensity will decrease because of dissociation of phisphore structure.  In addition to the self-glow of the sanitizer will increase too at temperate up to 70 oC , however, that will cause self-glow to the dosimeter material.

scholarly journals Mechanism of the Formation of Electronically Excited Species by Oxidative Metabolic Processes: Role of Reactive Oxygen Species

Biomolecules ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 258 ◽  
Author(s):  
Pavel Pospíšil ◽  
Ankush Prasad ◽  
Marek Rác
Keyword(s):  
Reactive Oxygen Species ◽  
Molecular Oxygen ◽  
Reactive Oxygen ◽  
High Energy ◽  
Oxygen Species ◽  
Human Beings ◽  
Metabolic Processes ◽  
Excited Species ◽  
Electronically Excited

It is well known that biological systems, such as microorganisms, plants, and animals, including human beings, form spontaneous electronically excited species through oxidative metabolic processes. Though the mechanism responsible for the formation of electronically excited species is still not clearly understood, several lines of evidence suggest that reactive oxygen species (ROS) are involved in the formation of electronically excited species. This review attempts to describe the role of ROS in the formation of electronically excited species during oxidative metabolic processes. Briefly, the oxidation of biomolecules, such as lipids, proteins, and nucleic acids by ROS initiates a cascade of reactions that leads to the formation of triplet excited carbonyls formed by the decomposition of cyclic (1,2-dioxetane) and linear (tetroxide) high-energy intermediates. When chromophores are in proximity to triplet excited carbonyls, the triplet-singlet and triplet-triplet energy transfers from triplet excited carbonyls to chromophores result in the formation of singlet and triplet excited chromophores, respectively. Alternatively, when molecular oxygen is present, the triplet-singlet energy transfer from triplet excited carbonyls to molecular oxygen initiates the formation of singlet oxygen. Understanding the mechanism of the formation of electronically excited species allows us to use electronically excited species as a marker for oxidative metabolic processes in cells.

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