scholarly journals Calcium Carbonate in Bio-Based Material and Factor Affecting Its Precipitation Rate for Repairing Concrete

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 883
Author(s):  
Prima Yane Putri ◽  
Isao Ujike ◽  
Nevy Sandra ◽  
Fitra Rifwan ◽  
Totoh Andayono
Keyword(s):  
Calcium Carbonate ◽  
Calcium Acetate ◽  
Tris Buffer ◽  
Precipitation Rate ◽  
Recent Past ◽  
Buffer Solution ◽  
Factors Affecting ◽  
Repair Materials ◽  
Series Of Experiments ◽  
Tris Buffer Solution

The use of bio-based material for repairing concrete is a relatively new method. Therefore, more results from simulated real-condition experiments are needed before being applied on a practical scale. In the recent past, several studies have been conducted on the improvement of bio-based repair materials. In this study, the bio-based material involving yeast, glucose, and calcium acetate mixed in a Tris buffer solution showed the potential to develop a microbial process leading to the precipitation of calcium carbonate. We investigated the factors affecting the precipitation rate of the calcium carbonate of bio-based materials for repairing leakage in the concrete specimens. Based on a series of experiments involving temperature, the type of dry yeast, and the concentration of the Tris buffer solution, the composition of bio-based materials with the highest precipitation rate of calcium carbonate was selected. The selected mixture could be applied to repair leakage of concrete until the cracks are sealed entirely.

scholarly journals A rapidly-dissolving silica-silver bioactive glass for cariostatic applications

2021 ◽  
Author(s):  
Saad Arshad
Keyword(s):  
Oral Cavity ◽  
Antibacterial Effect ◽  
Surface Hardness ◽  
Tris Buffer ◽  
Bacterial Strains ◽  
Buffer Solution ◽  
Solution Ph ◽  
Before And After ◽  
Knoop Microhardness ◽  
Tris Buffer Solution

In this study, bioactive glasses were designed for the purposes of reducing the incidence of dental caries and lesion formation by supplying the teeth with therapeutic ions which may support remineralization and provide an antibacterial effect against oral cavity bacteria. Three glasses were synthesised through the melt quench method: Si-Control (SiO2-CaO-P2O5-Na2O), Si-02 and Si-05, where 0.2% and 0.5% Ag2O were substituted, respectively, for SiO2 in the control glass. The glasses were then ground, characterized and dissolved in tris buffer solution (pH=7.30) for 6, 12 and 24 hours, with the pH rise of the solution being recorded (7.48 for Si-Control, and 7.66 for both Si-02 and Si-05 after 24 hours) and the ions that were released into the tris buffer solution quantified. Samples of each glass were subsequently embedded into non-fluoridated toothpaste and samples of the paste were used to brush resin-mounted lamb molars after a 1.0M HCl overnight demineralization challenge. Knoop microhardness measurements were recorded before and after brushing to determine the presence of remineralization on the surface of the teeth (Percent Surface Hardness Loss of 37%, 35% and 34% for Si-Control, Si-02 and Si-05 respectively after 24 hours). Four oral cavity bacterial strains were isolated through swabs of the inner cheek, gums and teeth surfaces of three volunteers, and placed on agar discs. 0.5g of each glass were placed onto the discs and the resultant inhibition zones were measured after 6, 12 and 24 hours. Si-05 consistently performed better than Si-02 on all strains and timeframes, while Si-Control exhibited no antibacterial effect at any time point.

scholarly journals A rapidly-dissolving silica-silver bioactive glass for cariostatic applications

2021 ◽  
Author(s):  
Saad Arshad
Keyword(s):  
Oral Cavity ◽  
Antibacterial Effect ◽  
Surface Hardness ◽  
Tris Buffer ◽  
Bacterial Strains ◽  
Buffer Solution ◽  
Solution Ph ◽  
Before And After ◽  
Knoop Microhardness ◽  
Tris Buffer Solution

In this study, bioactive glasses were designed for the purposes of reducing the incidence of dental caries and lesion formation by supplying the teeth with therapeutic ions which may support remineralization and provide an antibacterial effect against oral cavity bacteria. Three glasses were synthesised through the melt quench method: Si-Control (SiO2-CaO-P2O5-Na2O), Si-02 and Si-05, where 0.2% and 0.5% Ag2O were substituted, respectively, for SiO2 in the control glass. The glasses were then ground, characterized and dissolved in tris buffer solution (pH=7.30) for 6, 12 and 24 hours, with the pH rise of the solution being recorded (7.48 for Si-Control, and 7.66 for both Si-02 and Si-05 after 24 hours) and the ions that were released into the tris buffer solution quantified. Samples of each glass were subsequently embedded into non-fluoridated toothpaste and samples of the paste were used to brush resin-mounted lamb molars after a 1.0M HCl overnight demineralization challenge. Knoop microhardness measurements were recorded before and after brushing to determine the presence of remineralization on the surface of the teeth (Percent Surface Hardness Loss of 37%, 35% and 34% for Si-Control, Si-02 and Si-05 respectively after 24 hours). Four oral cavity bacterial strains were isolated through swabs of the inner cheek, gums and teeth surfaces of three volunteers, and placed on agar discs. 0.5g of each glass were placed onto the discs and the resultant inhibition zones were measured after 6, 12 and 24 hours. Si-05 consistently performed better than Si-02 on all strains and timeframes, while Si-Control exhibited no antibacterial effect at any time point.

scholarly journals Novel fluoride and strontium-containing bioactive glasses for dental varnishes-design and bioactivity in Tris buffer solution

2019 ◽  
Vol 503-504 ◽  
pp. 120-130 ◽  
Author(s):  
Thaer Jaber Al-Khafaji ◽  
Ferranti Wong ◽  
Padhraig S. Fleming ◽  
Natalia Karpukhina ◽  
Robert Hill
Keyword(s):  
Tris Buffer ◽  
Buffer Solution ◽  
Bioactive Glasses ◽  
Tris Buffer Solution

scholarly journals Application of bio-based material for concrete repair: case study leakage on parallel concrete slab

2019 ◽  
Vol 258 ◽  
pp. 01013
Author(s):  
Prima Yane Putri ◽  
Isao Ujike ◽  
Keiyu Kawaai
Keyword(s):  
Calcium Carbonate ◽  
Crack Width ◽  
Concrete Slab ◽  
Metabolic Process ◽  
Small Scale ◽  
Buffer Solution ◽  
Concrete Repair ◽  
Initial Flow ◽  
Crack Sealing ◽  
Repair Materials

The applicability of bio-based materials for concrete repair has been studied. This technique employs yeast, glucose and calcium acetate mixed in Tris buffer solution. The microbial metabolic process leads to precipitation of calcium carbonate. First, this study investigated the applicability of bio-based repair materials to small-scale concrete specimens. On this research, water permeability test was carried out to evaluate the effectiveness of the selected mixtures for sealing cracks in the concrete specimens. As the result of permeability tests carried out using specimens with crack width of 0.6 mm, water leakage through crack was observed to be negligible after 216 hours by continuous pouring method using bio-based repair materials. Also, this study showed the initial flow rate for the specimens with the same crack width does not influence crack sealing time. Furthermore, the precipitation of the calcium carbonate from the bio-based materials was analyzed by Fourier-Transformed Infra-Red spectroscopy (FT-IR) and then examined by X-ray Diffraction (XRD) for mineral identification formed through the microbial metabolic process.

Resurveying the Tris buffer solution: The specific interaction between tris(hydroxymethyl)aminomethane and lysozyme

2008 ◽  
Vol 378 (2) ◽  
pp. 144-150 ◽  
Author(s):  
Li Quan ◽  
Dengguo Wei ◽  
Xiaolu Jiang ◽  
Yang Liu ◽  
Zhiyu Li ◽  
...  
Keyword(s):  
Specific Interaction ◽  
Tris Buffer ◽  
Buffer Solution ◽  
Tris Buffer Solution

scholarly journals Ion release from SrO-CaO-TiO2-P2O5 glasses in Tris buffer solution

2009 ◽  
Vol 117 (1369) ◽  
pp. 935-938 ◽  
Author(s):  
Sungho LEE ◽  
Akiko OBATA ◽  
Toshihiro KASUGA
Keyword(s):  
Tris Buffer ◽  
Ion Release ◽  
Buffer Solution ◽  
Tris Buffer Solution

Thermal Study of Lysozyme Binding with β-Cyclodextrin

2011 ◽  
Vol 110-116 ◽  
pp. 1966-1969 ◽  
Author(s):  
Gholamreza Rezaei Behbehani ◽  
Lyla Barzegar
Keyword(s):  
Isothermal Titration Calorimetry ◽  
Thermal Study ◽  
Tris Buffer ◽  
Titration Calorimetry ◽  
Solvation Model ◽  
Buffer Solution ◽  
Tris Buffer Solution

Effects of β-cyclodextrin, βCD, on refolding of lysozyme was investigated at pH 12 employing isothermal titration calorimetry (ITC) at 300K in 30mM Tris buffer solution. βCD was employed as an anti-aggregation agent and the heats obtained for lysozyme+βCD interactions are reported and analyzed in terms of the extended solvation model. It was indicated that there are two sets of identical and non-cooperative sites for βCD.

Effect of chloride ions in Tris buffer solution on bioactive glass apatite mineralization

2017 ◽  
Vol 8 (4) ◽  
pp. 438-449 ◽  
Author(s):  
Gloria Kirste ◽  
Juliane Brandt-Slowik ◽  
Christian Bocker ◽  
Michael Steinert ◽  
Reinhard Geiss ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Chloride Ions ◽  
Tris Buffer ◽  
Buffer Solution ◽  
Tris Buffer Solution
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