Metal Research Papers - Academia.edu (original) (raw)

http://www.scribd.com/doc/74982961/; S. A. Ostroumov (С.А.Остроумов), G. M. Kolesov.
The Aquatic Macrophyte Ceratophyllum demersum Immobilizes Au Nanoparticles after Their Addition to Water. -
Doklady Biological Sciences, 2010, Vol. 431, pp. 124–127.
File in the author’s PC: D:\Публикации мои тексты\2010.DBS.Au\Гидробиология. новые факты. ключевые слова-золото, наноматериалы, водные макрофиты, роголистник.10DBS.Au.Abstract in English.Keywords.doc;
© Pleiades Publishing, Ltd., 2010. ISSN 00124966;
Original Russian Text © S.A. Ostroumov, G.M. Kolesov, 2010, published in Doklady Akademii Nauk, 2010, Vol. 431, No. 4, pp. 566–569.
DOI: 10.1134/S0012496610020158;
Presented by Academician M.A. Fedonkin July 31, 2009;
ABSTRACT: Study of biogenic migration of the chemical elements is an important line of the biosphere research [1–8]. Biogenic migration of the elements in aquatic ecosystems, both freshwater and saltwater ones, is important for water self- purification and water quality formation [9–11]. Data on element accumulation and binding by aquatic organisms, including macrophytes, are necessary for analyzing the organisms’ important role in biogenic migration of the elements in aquatic ecosystems. There were no published data on the gold (Au) content in Ceratophyllum demersum L. and on interaction between Au nanoparticles and aquatic macrophytes. The goal of this work was to study the immobilization of Au nanoparticles added to the water medium of microcosms in the presence of macrophyte C. demersum L. This study was the first to determine the concentration of Au and some other elements in C. demersum phytomass after incubation in microcosms containing Au nanosize particles (NSPs). Results of the experiments: (1) the first data have been obtained that demonstrate that a significant amount of Au NSPs may bind to live phytomass of an aquatic plant, C. demersum. As a result of binding and/or immobilization, the content of Au was greater than the background level by a factor of 430.3; (2) modification of NSPs with a protein (immunoglobulin) had no effect on the NSP immobilization by macrophytes. The results contribute to understanding the role of these organisms in biogenic migration of elements. These data enable us to estimate the participation of phytomass of the studied macrophyte species in element concentration (as exemplified by Au) in an aquatic system.
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