Crystalline Silica in Plants

Sterling, Clarence

doi:10.1002/j.1537-2197.1967.tb10707.x

Cited by 17 publications

(2 citation statements)

References 13 publications

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“…Whether in plants or animals, at the microscopic level, biogenic silica is always considered to be amorphous, showing no order beyond 10 Å, or approximately three Si-O-Si units. Nevertheless, Sterling [128] identified the first examples of crystalline silica-together with amorphous silica -in strawberry leaves and tabashir. In tabashir, the crystalline parts of SiO2 could be ascribed to low tridymite and α-cristobalite through X-ray diffraction analysis, and to quartz in strawberry leaves.…”

Section: Plants (Kingdom Plantae)mentioning

confidence: 99%

Biogenic Metal Oxides

Moura

Unterlass

2020

Biomimetics

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Biogenic metal oxides (MxOy) feature structures as highly functional and unique as the organisms generating them. They have caught the attention of scientists for the development of novel materials by biomimicry. In order to understand how biogenic MxOy could inspire novel technologies, we have reviewed examples of all biogenic MxOy, as well as the current state of understanding of the interactions between the inorganic MxOy and the biological matter they originate from and are connected to. In this review, we first summarize the origins of the precursors that living nature converts into MxOy. From the point-of-view of our materials chemists, we present an overview of the biogenesis of silica, iron and manganese oxides, as the only reported biogenic MxOy to date. These MxOy are found across all five kingdoms (bacteria, protoctista, fungi, plants and animals). We discuss the key molecules involved in the biosynthesis of MxOy, the functionality of the MxOy structures, and the techniques by which the biogenic MxOy can be studied. We close by outlining the biomimetic approaches inspired by biogenic MxOy materials and their challenges, and we point at promising directions for future organic-inorganic materials and their synthesis.

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Section: Plants (Kingdom Plantae)mentioning

confidence: 99%

Biogenic Metal Oxides

Moura

Unterlass

2020

Biomimetics

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“…o dióxido de silício é também encontrado em várias partes de algumas plantas. Nas plantas como "Cyperus", "Ulmus", "Coffea", "Eucalyptus" (Lanning, 1960), "Fragaria", "Equisentum" e secreção do bambu (Sterling, 1967) foram encontradas sílica na forma amorfa e também na forma cristalina. Na alga verde, chlorochytridion tuberculatum, foi encontrado quartzo cristalino (Brandenberger)1)…”

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Estabilização da fase β e obtenção da fase α da cristobalita a partir do resíduo da casca de arroz queimada

Harima¹

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2.3 -Algumas considerações sobre a Si02 da casca de arroz 27 3 -ESTABILIZAÇÃO QUÍMICA DA CRISTOBALITA J3 29 3. 1 -Introdução 3.2 -Revisão histórica 29 3.3 -Mecanismos de estabilização 3.4 -Efeitos dos dopantes 3.5 -Alguns usos da cristobalita p 3.6 -Alguns resultados obtidos na literatura PARTE II-CONVERSÃO DA SÍLICA DA CASCA DE ARROZ EM CRISTOBALITA 1 -MATÉRIA PRIMA 40 1.1 -Composição química da casca de arroz 40 1.2 -Comportamento reológico da CAQ moída 41 2 -PROCEDIMENTO EXPERIMENTAL 43 2.1 -MATERIAIS 43 2.1.a -Para obtenção da cristobalita a 43 2.1.b -Para estabilização da cristobalita p 43 2.2 -MÉTODOS DE PREPARAÇÃO 44 2.

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SEM studies on silica from plant materials

Patel

1987

X-Ray Spectrometry

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The Silica structural framework in plant materials can be separated from the organic part by acid leaching and can be examined by SEM. Scanning electron micrographs characterizing the bonding and distribution patterns of silica in rice husk, rice straw and sugarcane leaves are presented. The differences in the surface morphology of the three plant products are discussed. Figure 1, representing acid-treated rice straw, shows the structural network of SiO, to be intact. Acid treat-

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Crystalline Silica in Plants

Cited by 17 publications

References 13 publications

Biogenic Metal Oxides

Biogenic Metal Oxides

Estabilização da fase β e obtenção da fase α da cristobalita a partir do resíduo da casca de arroz queimada

SEM studies on silica from plant materials

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