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Showing 1 to 8 of 8 for “"Sporosarcina pasteurii"”.
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Biomineralization in cement based materials : inoculation of vegetative cells
… influence of vegetative bacteria, specifically Sporosarcina pasteurii (S. pasteurii), when it is incorporated within cement paste. Vegetative S. pasteurii cells were suspended in a urea-yeast extract medium and this medium was mixed with cement. The influence of the vegetative S. pasteurii cells …
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Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands
… interfaces treated with the same soil bacterium (Sporosarcina pasteurii), but varying urea-CaCl2 solution concentrations. The key aspect examined was the role of CaCO3 micro-architecture – comprised of the CaCO3 vertical profile, crystal size and distribution, and morphology. Results showed that …
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Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates
… and treated Portland cement mortar beams. Sporosarcina pasteurii in nutrient media was applied to cracked beams in two different environmental conditions. Several experimental control treatments lacking bacteria were applied to additional sets of beams. Furthermore, bio-deposits were grown …
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A technical and economic feasibility study on repurposing copper mine tailings via microbial induced calcium carbonate precipitation
… by exploiting the ability of the microorganism, Sporosarcina pasteurii, to produce a biocement capable of binding sand particles (or any aggregate) together into a solid. Furthermore, such bio-bricks can be grown from otherwise ‘waste' resources such as human urine. This significantly reduces …
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Manufacturing bio-tiles
… MICP pathway. The ureolytic activity of Sporosarcina pasteurii was controlled by centrifuging and dilution with fresh yeast extract media. Bio-tiles can be made with MICP using various methods, each with drawbacks and advantages. Three methods were tested: submersion, pumping and …
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Manufacturing bio-bricks using microbial induced calcium carbonate precipitation and human urine
… “stabilising” the urine with calcium hydroxide. Sporosarcina pasteurii (S. pasteurii) was the bacteria strain used to help drive the MICP process. The bacteria degraded the urea present in the urine to form carbonate ions which then combined with the calcium ions present in the urine solution to …
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Microbial-Induced Calcium Carbonate Precipitation: from micro to macro scale
Microbial-Induced Calcium Carbonate (CaCO3) Precipitation (MICP) is a biological process in which microbial activities alter the surrounding aqueous environment and induce CaCO3 precipitation. Because the formed CaCO3 crystals can bond soil particles and improve the mechanical properties of soils …