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Assessment of the Volatility and Thermal Stability of Chemicals that Stimulate Females of Moina macrocopa (Cladocera) to Produce Diapausing Eggs [Text] / T. S. Lopatina, E. S. Zadereev // Russ. J. Ecol. - 2015. - Vol. 46, Is. 1. - P103-108, DOI 10.1134/S1067413615010105. - Cited References:25 . - ISSN 1067-4136. - ISSN 1608-3334

РУБ Ecology
Рубрики:
SEXUAL REPRODUCTION
   INDUCTION
   DAPHNIA
   METABOLITES
   CRUSTACEA
Кл.слова (ненормированные):
cladocerans -- diapause -- chemical communication -- chemical cues
Аннотация: The volatility and thermal stability of chemicals that are contained in the metabolic products of Moina macrocopa females that stimulate the production of diapausing eggs in these females have been studied in experiments with separately cultivated individuals. It has been shown that the gametogenesis-stimulating chemicals in this species are nonvolatile compounds: the effect of the medium that contains the metabolic products of the organism was not decreased after many hours of blowing with argon. Prolonged heating up to 80 degrees C also did not deactivate the ability of these products to change the reproductive mode. The effect of the medium that contains these products decreased after boiling, but if the possibilities of their oxidation or binding with salts of metals were excluded, they retained the ability to change the reproductive mode of the animals even after boiling.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
ИБФ СО РАН

Доп.точки доступа:
Lopatina, T.S.; Zadereev, E.S.

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Low-temperature argon and ammonia plasma treatment of poly-3-hydroxybutyrate films: Surface topography and chemistry changes affect fibroblast cells in vitro / R. A. Surmenev [et al.] // Eur Polym J. - 2019. - Vol. 112. - P137-145, DOI 10.1016/j.eurpolymj.2018.12.040 . - ISSN 0014-3057
Кл.слова (ненормированные):
Cell adhesion -- Dielectric barrier discharge -- Plasma treatment -- Surface etching -- Wetting behaviour -- Ammonia -- Argon -- Cell adhesion -- Cell culture -- Chemical modification -- Contact angle -- Dielectric materials -- Electric discharges -- Fibroblasts -- Mammals -- Nitrogen plasma -- Plasma applications -- Surface roughness -- Surface treatment -- Temperature -- Topography -- Ammonia plasma treatment -- Dielectric barrier discharges -- Different proportions -- Plasma treatment -- Poly-3-hydroxybutyrate -- Poly3-hydroxybutyrate (PHB) -- Surface etching -- Wetting behaviour -- Wetting
Аннотация: Poly-3-hydroxybutyrate (PHB) films were plasma-treated using pure NH3, pure Ar or mixtures of the two different proportions (20%, 30%, 40%, 50%, 70% NH3 in Ar). Surface chemistry and surface topography changes of PHB films were observed after plasma processing in all plasma regimes. The XPS results confirmed the absence of chemical modification in the case of pure Ar plasma treatment. Nitrogen-containing groups (e.g., N–C[dbnd]O) were detected on the surfaces of P3HB films treated with NH3-containing plasma. The surfaces of the untreated P3HB films were hydrophobic, and plasma treatment turned the surfaces hydrophilic, irrespective of the treatment. A significant decrease in the contact angle and an increase in the free surface energy were observed. An insignificant surface ageing effect was observed when P3HB samples were exposed to air for 10 days. In NIH 3T3 mice fibroblast cells, cell adhesion was significantly improved after plasma treatment in an Ar atmosphere, which is likely related to the fact that there was a surface ? potential of 88.6 mV at neutral pH, causing a cleavage of the polymer chains and an increase in surface roughness. © 2018 Elsevier Ltd

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Держатели документа:
Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, 70569, Germany
Synchrotron Radiation Facility ANKA, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Surmenev, R. A.; Chernozem, R. V.; Syromotina, D. S.; Oehr, C.; Baumbach, T.; Krause, B.; Boyandin, A. N.; Dvoinina, L. M.; Volova, T. G.; Surmeneva, M. A.

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