Model studies of colloidal silica precipitation using biosilica extracts from Equisetum telmateia

Perry, Carole C.; Keeling-Tucker, Tracey

doi:10.1007/s00396-002-0816-7

Cited by 78 publications

(78 citation statements)

References 25 publications

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“…Catecholate complexes, for example, have been used to control the silica precipitation, and hence allows one to carefully monitor the reaction kinetics [29,36]. Alternately, TMOS was shown to precipitate silica particles within a few minutes in the presence of (bio)macromolecules (see Table 1 for details).…”

Section: Resultsmentioning

confidence: 98%

“…Furthermore, the effects of various silica precursors have been studied using some of the aforesaid macromolecules and biomacromolecules. In particular, the use of tetramethoxysilane [8-22, 24, 25], tetraethoxysilane [30,31], sodium silicate (water glass) [9,33], silica sol [32], tetrasodium monosilicate n-hydrate [34] and various catecholate complex -M 2 [Si(C 6 H 4 O 2 ) 3 ]·xH 2 O (M = Li, Na, K, NH 4 and NEt 3 H) [29,35,36] have been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Macromolecule mediated bioinspired silica synthesis using a diol-modified silane precursor

et al. 2005

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Silicon isotope geochemistry is a relatively new branch of environmental change research. Here we review the recent developments in the preparation of materials, analytical methods and applications of stable silicon isotope geochemistry in the most common types of biogenic silica currently being analysed. These materials are: diatom, radiolarian and siliceous sponges in lake and ocean sediments and plant phytoliths which are preserved in soils. Despite analyses of Si isotopes being carried out on rocks and minerals since the 1950's and the increasingly widespread use of Si isotopes since the 1990's, to date only a relatively small number of studies have applied Si isotope ratios to environmental change. In lake and ocean sediments the analysis of Si isotope ratios from biogenic materials has the potential to provide an important source of palaeoenvironmental information, especially where carbonates are not preserved. In plants and soils few studies have used Si isotopes, but important advances have recently been made in the understanding within plant fractionations. These may be useful in the application of Si isotopes in phytoliths to archaeological and palaeoenvironmental contexts

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Macromolecule mediated bioinspired silica synthesis using a diol-modified silane precursor

et al. 2005

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“…However, more complex molecules such as proteins act as regulators of the systems. Perry and Keeling-Tucker (2003) demonstrated that proteins and proteoglycans have a role in the catalysis of silica polycondensation and in structure direction during the formation of silica structures in Equisetum telmateia.…”

Section: The Mechanism Of Metal Nanoparticle Formation In Plantsmentioning

confidence: 99%

Synthesis of metal nanoparticles in living plants

Marchiol

2012

Ital J Agronomy

103

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In recent years, nanotechnologies have evolved from a multidisciplinary research concept to a primary scientific field. Rapid growth of new technologies has led to the development of nanoscale device components, advanced sensors, and novel biomimetic materials. In addition to chemical and physical approaches a new, simple and cheaper strategy to synthesize metal nanoparticles utilizes biological tools such as bacteria, yeasts, fungi, and plants. The majority of research has investigated ex vivo synthesis of nanoparticles in plants, proving that this method is very cost effective, and can therefore be used as an economic and valuable alternative for the large-scale production of metal nanoparticles. Instead, very few studies have been devoted to investigating the potential of living plants. The synthesis of metal nanoparticles using living plants is discussed in this review. So far, metal NPs formation in living plants has been observed for gold, silver, copper and zinc oxide. To date the results achieved demonstrate the feasibility of this process; however several aspects of the plant physiology involved should be clarified in order to be able to gain better control and modulate the formation of these new materials. Plant sciences could significantly contribute to fully exploring the potential of phyto-synthesis of metal nanoparticles.

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“…Silicatein [2,3], silaffins [4], silacidins [5], and the biopolymer from Equisetum species [6][7][8] are capable of processing silicic acid from the environment to form particulate silica that becomes integrated into the organism's external structures. Silicatein was shown to have homology to both the serine and cysteine proteases which leads to the notion that these homologous proteins may be able to function in a similar role.…”

Section: Introductionmentioning

confidence: 99%

Enzyme-mediated Synthesis of Silsesquioxanes

Frampton

Simionescu

Zelisko³

2009

Silicon

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In an initial report we demonstrated that some serine proteases were suitable candidates for the hydrolysis and condensation of tetraethoxysilane and phenyltrimethoxysilane under solvent-free conditions. Using trypsin as a model enzyme, we have demonstrated the generality of this method by expanding the number of available silicon-based substrates that can be processed by the enzyme, as well as including pepsin to demonstrate that this phenomenon is not exclusive to a single family of enzymes. A series of time course 29 Si NMR experiments using D 2 O revealed that the rate of hydrolysis of phenyltrimethoxysilane could be enhanced by a factor of 11-155 times over enzyme-free controls when either trypsin or pepsin were used as catalysts. The following trend was observed when comparing the hydrolysis/condensation rates of a number of different organotrimethoxysilanes: methyltrimethoxysilane>allytrime-thoxysilane>ethyltrimethoxysilane>phenyltrimethoxysilane.

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Model studies of colloidal silica precipitation using biosilica extracts from Equisetum telmateia

Cited by 78 publications

References 25 publications

Macromolecule mediated bioinspired silica synthesis using a diol-modified silane precursor

Macromolecule mediated bioinspired silica synthesis using a diol-modified silane precursor

Synthesis of metal nanoparticles in living plants

Enzyme-mediated Synthesis of Silsesquioxanes

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