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Biogenic porous silica and silicon sourced from Mexican Giant Horsetail (Equisetum myriochaetum) and their application as supports for enzyme immobilization. Colloids and Surfaces B: …
SUMMARY. Methods for determination of low levels of biogenic silica (0.2-0.4 mg SiO2) in aqueous samples after digestion with three wetalkaline extraction procedures compared favourably in both precision of replicates and recovery of silica utilized by diatoms in budgeted cultures. Leaching samples with 0.2 M NaOH for 10-15 min at 100°C was the …
1. Introduction. Silicon (Si) is the second most abundant element on Earth after oxygen and it is considered non-essential for plant growth and development [].Si is beneficial and, when provided to plants, it increases vigour, resistance to environmental stresses and mechanical strength of aerial organs [2,3].The form of Si that is taken up …
The extent of authigenic alteration of biogenic and reactive silica in Pearl River estuarine sediments has been estimated using wet-chemical digestion methods. Results show relatively constant distributions of biogenic and reactive Si horizontally and vertically. Based on three core measurements, the biogenic and total reactive Si …
The biogenic silica extraction method we employ for both the. Na 2 CO 3 and the KOH treatments generally follows Mortlock and. Froelich (1989) with some imp ortant differences. Before an alysis, sam-
The biogenic methods lead to the designing of NPs with interesting morphologies and varied sizes (Riddin et al., 2010, Schröfel et al., 2014); for example, Ag NPs in the size range of 25 ± 12 nm have been prepared by exposing fungal biomass (Verticillium) to the aqueous solution of Ag + ions, where the NPs were not toxic since …
The grain-size distribution of lake sediments is a crucial proxy for paleoclimate reconstruction, as it is closely related to the transport dynamics of clastic materials from the surrounding land. However, the presence of biogenic silica, particularly remains of diatom frustules, can significantly bias the grain-size distribution of lake …
More specific subject area: Biogenic silica (BSi) extraction from soil and sediments; phytoliths extraction Name of your method: Time-efficient, easy and safe extraction of biogenic silica (BSi) from phytolith-poor sediments Name and reference of original method: Kelly, E. F. (1990), Methods for extracting opal phytoliths from soil and plant ...
Biogenic silica is an excellent alternative to synthetic silica because of its capricious configuration, density, composition, less toxicity, environmentally friendly synthesis and cost-effective preparations. Among the available agricultural bioresources, we have chosen groundnut shell, banana peel, coconut husk, orange peel and walnut shell …
The extraction and yield recovery of biogenic rosette-like silica-based microparticles (BRSM) as a sub-product of the nanocellulose (NCC) extraction process from the pineapple peels is reported ...
The deposition of silica in horsetail has been studied for many decades and we now have a possible mechanism of silica deposition in this plant which could also be …
We describe a modified method for the determination of biogenic silica (BSi) in lacustrine sediment samples with BSi concentrations >0.5% SiO2 (detection limit). To speed up the leaching procedure (48 samples per day), we suggest the use of Teflon autoclaves that can be left unattended (no stirring of the solution) for 3 h at 100°C in an …
Porous silica was synthesized from cornhusk using the sol–gel polymeric route and compared with ash obtained from the direct combustion process under laboratory conditions. The unmodified ash …
Biogenic silica deposition in horsetail stem and leaves following acid extraction and fluorescence imaging with PDMPO. A) Stomata and papillae-like …
ORIGINALRESEARCH published: 22 June 2022 doi: 10.3389/fpubh.2022.909196 Frontiers in Public Health | 1 June 2022 | Volume 10 | Article 909196
To prepare NiO@RH-SiO 2, a suitable quantity of Ni(NO 3) 2.6 H 2 O solution was prepared, and the pH of the solution was modulated to 11 with ammonia to generate nickel oxide sol. The nickel oxide sol was added to the silica sol prepared by the above procedure while stirring for 1 h. Then, the obtained reaction mixture was subjected to …
The present study summarizes the current literature on the presence and the structure of biogenic amorphous silica (BAS) in nature. Based on this review, it is shown …
Background The horsetails (Equisetum sp) are known biosilicifiers though the mechanism underlying silica deposition in these plants remains largely unknown. Tissue extracts from horsetails grown hydroponically and also collected from the wild were acid-digested in a microwave oven and their silica 'skeletons' visualised using the fluor, …
of biogenic amorphous silica (BAS) in nature. Based on this review, it is shown that BAS is ubiquitous in nature and exhibits a structure that cannot be differentiated from
eective method for removing biogenic silica from the lake-sediment samples that were investigated. Dierences in the removal eciency between the two samples might be due to the dierent dominant dia-tom species in the samples. The new method provides a more reliable and eective procedure for removing diatoms from lake-sediment samples.
Silicon (Si), the second most abundant element in the Earth's crust, is an important mineral for certain organisms. The oxidized form of silicon, silica (SiO 2), is …
Thus, this method of SiO 2 extraction was shown to be highly effective as well as being rather mild. SEM-EDX—Quantitative Analysis—of the Final Sample of Horsetail . The ... The common horsetail is considered to contain the highest percentage of amorphous ... This has been only possible due to the biogenic silica structures …
SUMMARY. Methods for determination of low levels of biogenic silica (0.2–0.4 mg SiO 2) in aqueous samples after digestion with three wetalkaline extraction procedures compared favourably in both precision of replicates and recovery of silica utilized by diatoms in budgeted cultures.Leaching samples with 0.2 M NaOH for 10–15 min at 100°C was the …
The aim of the study was to obtain natural rubber (NR) biocomposites with the addition of phyto-ashes reach in biogenic silica from plant biomass. For the production of bioadditives, a two-stage method of high …
Phytoliths can be used to reconstruct human-nature dynamics over the long term (from decennial to centennial and millennial time scales) and may capture activities that cannot be reconstructed through other proxies. Phytoliths consist of fossil biogenic silica (BSi), formed in plant organs and then released into the soil with plant decay. When working in …
Abstract Biomasses are a sustainable, CO2 neutral source used in biorefining. Si-accumulating plants can be used for the production of biogenic silica in a biomass valorisation process. This study examines the production of high-grade porous silica from different plant parts like rice, oat and spelt husk, rice straw and horsetail …
E. myriochaetum was subject to conventional acid digestion to extract biogenic silica with a% yield remarkably higher (up to 3 times) than for other Equisetum sp. (i.e. E. Arvense). The surface area of the isolated silica was ∼400 m 2 /g, suitable for biotechnological applications. Biogenic silicon was obtained by magnesiothermic …
extraction method (0.2M NaOH) and fluorescence spectrofluorophotometer is measured (excitation wavelength of 375 nm, emission wavelength of 530 nm). 3 Results and analysis . 3.1 The results of determinate Skeletonema cf. costatum biogenic silica(BSi) with hot alkali extraction and PDMPO dyeing method At 34 h of culture time, measured by hot …
ABSTRACT. The beneficiation of agricultural waste is a topical issue in the field of sustainable and renewable energy production. This review focuses on recent methods applied to extract silica and silicon (Si), a major semiconductor material, from different agricultural waste ashes and their application in solar cell nanotechnology.