دورية أكاديمية
Marine Bacteria under Low-Intensity Radioactive Exposure: Model Experiments
| العنوان: | Marine Bacteria under Low-Intensity Radioactive Exposure: Model Experiments |
|---|---|
| المؤلفون: | Olga V. Kolesnik, Tatiana V. Rozhko, Nadezhda S. Kudryasheva |
| المصدر: | International Journal of Molecular Sciences, Vol 24, Iss 1, p 410 (2022) |
| بيانات النشر: | MDPI AG, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Biology (General) LCC:Chemistry |
| مصطلحات موضوعية: | low-dose, radionuclides, radiotoxicity, radiation hormesis, bioassay, luminous bacteria, Biology (General), QH301-705.5, Chemistry, QD1-999 |
| الوصف: | Radioactive contaminants create problems all over world, involving marine ecosystems, with their ecological importance increasing in the future. The review focuses on bioeffects of a series of alpha and beta emitting radioisotopes (americium-241, uranium-(235 + 238), thorium-232, and tritium) and gamma radiation. Low-intensity exposures are under special consideration. Great attention has been paid to luminous marine bacteria as representatives of marine microorganisms and a conventional bioassay system. This bioassay uses bacterial bioluminescence intensity as the main testing physiological parameter; currently, it is widely applied due to its simplicity and sensitivity. Dependences of the bacterial luminescence response on the exposure time and irradiation intensity were reviewed, and applicability of hormetic or threshold models was discussed. A number of aspects of molecular intracellular processes under exposure to low-intensity radiation were analyzed: (a) changes in the rates of enzymatic processes in bacteria with the bioluminescent system of coupled enzymatic reactions of NADH:FMN-oxidoreductase and bacterial luciferase taken as an example; (b) consumption of an intracellular reducer, NADH; (c) active role of reactive oxygen species; (d) repairing of the DNA damage. The results presented confirm the function of humic substances as natural radioprotectors. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1422-0067 1661-6596 |
| Relation: | https://www.mdpi.com/1422-0067/24/1/410; https://doaj.org/toc/1661-6596; https://doaj.org/toc/1422-0067 |
| DOI: | 10.3390/ijms24010410 |
| URL الوصول: | https://doaj.org/article/6ded2fa93eb34319a4ef6030c220c0d3 |
| رقم الأكسشن: | edsdoj.6ded2fa93eb34319a4ef6030c220c0d3 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 14220067 16616596 |
|---|---|
| DOI: | 10.3390/ijms24010410 |