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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gladyshev M.I.
Заглавие : Growth and potential photosynthesis of cyanobacteria are stimulated by viable gut passage in crucian carp
Колич.характеристики :6 с
Место публикации : Aquat. Ecol.: KLUWER ACADEMIC PUBL, 2003. - Vol. 37, Is. 3. - P237-242. - ISSN 1386-2588, DOI 10.1023/A:1025801326088
Примечания : Cited References: 28
Предметные рубрики: FISH
LAKE
BIOMANIPULATION
FOOD
ROACH
RESTORATION
COMMUNITIES
ZOOPLANKTON
MECHANISMS
ALGAE
Ключевые слова (''Своб.индексиров.''): carassius auratus--cyanobacteria--gut passage
Аннотация: Growth and potential photosynthetic activity of phytoplankton passed through intestine of crucian carp (Carassius auratus) from a small Siberian reservoir were compared with those of phytoplankton taken the directly from the reservoir. The dominant phytoplankton species in the reservoir, Microcystis aeruginosa, showed a significant increase of growth after the passage. Subdominant Planktothrix agardhii also showed an increase in growth rate, while subdominants Anabaena flos-aquae and Aphanizomenon flos-aquae were not stimulated by the gut passage.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Setkov N.A., Eremeev A.V.
Заглавие : Inhibitors of protein biosynthesis can stimulate proliferation of mouse hepatocytes in vitro
Колич.характеристики :8 с
Место публикации : Biol. Bull: MAIK NAUKA/INTERPERIODICA, 2003. - Vol. 30, Is. 3. - P212-219. - ISSN 1062-3590, DOI 10.1023/A:1023843409416
Примечания : Cited References: 43
Предметные рубрики: TRANSFORMING-GROWTH-FACTOR
RAT-LIVER REGENERATION
FACTOR-BETA
DNA-SYNTHESIS
PRIMARY CULTURE
PARTIAL-HEPATECTOMY
EPITHELIAL-CELLS
EXPRESSION
MECHANISMS
MODULATION
Аннотация: Hepatocyte proliferation in the liver regenerating after partial hepatectomy ceases when the organ is restored, and the mechanism of this phenomenon is still unclear. In the experiments on fusing hepatocytes from the reoenerated mouse liver (15 days after partial hepatectomy) with NIH 3T3 mouse fibroblasts, we revealed no DNA synthesis in the nuclei of stimulated fibroblasts in heterokaryons (in the presence of hepatocyte nuclei), whereas DNA synthesis in nonfused cells was undisturbed. In this work, our purpose was to find out whether the suppression of DNA synthesis in heterokaryons could be due to the appearance in hepatocytes of some endogenous factors having an inhibitory effect on proliferation. To this end, hepatocytes from the mouse liver regenerated after partial hepatectomy were treated with cycloheximide for 1-4 h and were then fused with stimulated fibroblasts. Such a short-term treatment of hepatocytes with cycloheximide proved to result in the loss of their ability to inhibit DNA synthesis in the nuclei of stimulated or quiescent fibroblasts in heterokaryons, but hepatocytes proper actively proliferated in the medium with a low serum content (0.2%). When the mice with the liver reoenerated after partial hepatectomy were treated with a single sublethal dose of cycloheximide (3 mg/kg), their hepatocytes taken two days after this treatment had no inhibitory effect. Puromycin, another inhibitor of protein synthesis, had the same effect on hepatocytes. These results may be interpreted as evidence that the final stage of liver regeneration after damage is controlled by the factors having a C C negative effect on cell proliferation.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vanyukov V.V., Mikheev G.M., Mogileva T.N., Puzyr A.P., Bondar V.S., Svirko Y.P.
Заглавие : Polarization-sensitive nonlinear light scattering and optical limiting in aqueous suspension of detonation nanodiamonds
Колич.характеристики :6 с
Коллективы : Academy of Finland [278252]; Russian Foundation for Basic Research [13-02-96016 r_ural_a]; Emil Aaltosen Saatio foundation; Erasmus staff exchange support [Dno 275/04.04.02.01]; Ural Branch of Russian Academy of Sciences [12-C-1-1003]; FP7 Marie Curie project CACOMEL; FP7 Marie Curie project FANCEE
Место публикации : J. Opt. Soc. Am. B-Opt. Phys.: OPTICAL SOC AMER, 2014. - Vol. 31, Is. 12. - С. 2990-2995. - ISSN 0740-3224, DOI 10.1364/JOSAB.31.002990. - ISSN 1520-8540
Примечания : Cited References: 29. - This work was supported by the Academy of Finland (grant 278252), the Russian Foundation for Basic Research (grant 13-02-96016 r_ural_a), the Emil Aaltosen Saatio foundation, the Erasmus staff exchange support (Dno 275/04.04.02.01), the Ural Branch of Russian Academy of Sciences (project 12-C-1-1003), and the FP7 Marie Curie projects CACOMEL and FANCEE.
Предметные рубрики: CARBON-BLACK SUSPENSIONS
NANOTUBES
DEPENDENCE
MECHANISMS
PARTICLES
CLUSTERS
Аннотация: We report on the polarization dependence of the optical limiting and nonlinear light scattering in nanodiamond clusters suspended in distilled water. The nanosecond Z-scan measurements at a wavelength of 532 nm reveal that the nonlinear transmittance of the suspension is independent of polarization, while the energy of the light pulses scattered at 90 deg shows a cosine-like dependence on the polarization azimuth of the incident beam. Moreover, the ratio of the energies of the vertically and horizontally polarized scattered pulses is a nonmonotonous function of the input fluence. The obtained results can be explained in terms of the change of scattering center size under the laser action and are in agreement with the predictions of the Rayleigh-Mie scattering theory. (C) 2014 Optical Society of America
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vanyukov V..., Mogileva T..., Mikheev G..., Puzir A..., Bondar V..., Svirko Y...
Заглавие : Size effect on the optical limiting in suspensions of detonation nanodiamond clusters
Колич.характеристики :8 с
Место публикации : Appl. Optics: OPTICAL SOC AMER, 2013. - Vol. 52, Is. 18. - С. 4123-4130. - ISSN 1559-128X, DOI 10.1364/AO.52.004123
Примечания : Cited References: 40. - This work was supported by the Ural Branch of RAS (Project No. 12-C-1-1003) and FP7 Marie Curie projects CACOMEL and FANCEE.
Предметные рубрики: CARBON NANOTUBE SUSPENSIONS
ONION-LIKE CARBON
NONLINEAR LIGHT-SCATTERING
Z-SCAN TECHNIQUE
PULSE DURATION
BEHAVIOR
MECHANISMS
PARTICLES
Аннотация: We report on the optical limiting (OL) in stable aqueous suspensions of detonation nanodiamond (ND) clusters with average size of 50, 110, and 320 nm. The nanosecond Z-scan measurements at wavelength of 532 nm revealed that the larger the cluster size, the better the OL performance and the higher the ray stability of the ND suspension. Our analysis showed that the nonlinear scattering and the nonlinear absorption are the dominant mechanisms of OL in aqueous ND suspensions. (C) 2013 Optical Society of America
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kobzeva T.V., Melnikov A.R., Karogodina T.Y., Zikirin S.B., Stass D.V., Molin Y.N., Rodicheva E.K., Medvedeva S.E., Puzyr A.P., Burov A.A., Bondar V.S., Gitelson J.I.
Заглавие : Stimulation of luminescence of mycelium of luminous fungus Neonothopanus nambi by ionizing radiation
Колич.характеристики :8 с
Коллективы : Program of Siberian Branch of Russian Academy of Sciences [71]; Council for Grants of the President of the Russian Federation for Support of Leading Scientific Schools [NSh 2272.2012.3]; Russian Foundation for Basic Research [12-03-33082]; Program of Government of Russian Federation "On the Efforts for Attracting Leading Researchers to Educational Institutions of Russia" [11.G34.31.0058]
Место публикации : Luminescence: WILEY-BLACKWELL, 2014. - Vol. 29, Is. 7. - С. 703-710. - ISSN 1522-7235, DOI 10.1002/bio.2656. - ISSN 1522-7243
Примечания : Cited References: 29. - The work was supported by the Program of Siberian Branch of Russian Academy of Sciences (project no. 71), Council for Grants of the President of the Russian Federation for Support of Leading Scientific Schools (project no. NSh 2272.2012.3), the Russian Foundation for Basic Research (project no. 12-03-33082), and the Program of Government of Russian Federation "On the Efforts for Attracting Leading Researchers to Educational Institutions of Russia" (grant no. 11.G34.31.0058).
Предметные рубрики: BIOLUMINESCENCE
COMPONENTS
MECHANISMS
SYSTEM
Ключевые слова (''Своб.индексиров.''): higher luminous fungi--neonothopanus nambi--ionizing irradiation--reactive oxygen species--lipid peroxidation
Аннотация: The luminescent system of higher luminous fungi is not fully understood and the enzyme/substrate pair of the light emission reaction has not been isolated. It was suggested that luminescence of fungi involves oxidase-type enzymes, and reactive oxygen species are important for fungal light production. Generation of reactive oxygen species can be stimulated by ionizing irradiation, which has not been studied for luminous fungi. We report the effect of X-irradiation on the luminescence of fungus Neonothopanus nambi. Experiments were performed withmyceliumon a home-built setup based on an X-ray tube and monochromator/photomultiplier tube. Application of X-rays does not change the emission spectrum, but after approximately 20 min of continuous irradiation, light production from unsupported mycelium starts growing and increases up to approximately five times. After peaking, its level decreases irrespective of the presence of X-irradiation. After staying at a certain level, light production collapses to zero, which is not related to the drying of the mycelium or thermal impact of radiation. The observed shape of kinetics is characteristic of a multistage and/or chain reaction. The time profile of light production must reflect the current levels of radicals present in the system and/or the activity of enzyme complexes involved in light production. Copyright (C) 2014 John Wiley & Sons, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky, Alexander, Trofimova, Elena, Dementyev, Dmitry, Petrichenkov, Michail
Заглавие : The long-term effects of gamma-radiation on the growth of Allium cepa plants
Колич.характеристики :6 с
Коллективы : Krasnoyarsk Regional Fund of Science - Russian Foundation for Basic Research [18-44-240001]
Место публикации : Int. J. Radiat. Biol.: TAYLOR & FRANCIS LTD, 2020. - Article in press. - ISSN 0955-3002, DOI 10.1080/09553002.2021.1844337. - ISSN 1362-3095(eISSN)
Примечания : Cited References:28. - The study was partly supported by grant of the Krasnoyarsk Regional Fund of Science - Russian Foundation for Basic Research No. 18-44-240001.
Предметные рубрики: IONIZING-RADIATION
PISUM
ABERRATIONS
MECHANISMS
MERISTEM
SEEDS
Аннотация: Purpose The purpose of this study was to assess the long-term effects of gamma-radiation, including low-dose radiation, on growth parameters of onion (Allium cepa) seedling roots 6-10 days after irradiation. Materials and methods Onion seedlings were exposed to a Cs-137 gamma source at doses ranging from 0.1 to 10 grays (Gy). Responses of root and shoot length growth were studied 6 and 10 days after irradiation. Results Our results showed inhibition of the root and shoot length growth 6 days after exposure at all doses, including the low dose - 0.1 Gy. At a later point in time (day 10), root and shoot inhibition was only observed after irradiation at high doses (above 5 Gy), and that suggested the occurrence of cell repair after irradiation at low doses. The results indicated that the length of seedling roots was more sensitive to gamma-irradiation than the shoot length. Conclusion The results of the study suggested that short-term gamma-irradiation of onion seedlings (absorbed doses of 0.1-10 Gy) caused inhibition of plant growth 6 and 10 days after irradiation. The dose dependence of the onion root length was linear. The present study showed for the first time that short-term low-dose gamma-irradiation could induce long-term negative effects on plant growth.
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