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Related Concept Videos

Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
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The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.

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Updated: Jun 23, 2026

Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii
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Published on: April 16, 2016

Biocalcification by Bacillus pasteurii urease: a novel application.

Deepak Sarda1, Huzaifa S Choonia, D D Sarode

  • 1Food Engineering and Technology Department, Institute of Chemical Technology Deemed University, Matunga, Mumbai 400019, India.

Journal of Industrial Microbiology & Biotechnology
|May 6, 2009
PubMed
Summary
This summary is machine-generated.

Microbiologically induced calcite precipitation (MICP) using Bacillus pasteurii NCIM 2477 improves brick durability. This novel method reduces water absorption, enhancing brick structures against moisture damage.

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Area of Science:

  • Biocalcification and Geomicrobiology
  • Materials Science and Engineering

Background:

  • Brick structures are susceptible to moisture-induced deterioration.
  • Microbiologically Induced Calcite Precipitation (MICP) utilizes urease-producing soil bacteria.
  • Urease activity facilitates calcite deposition, a potential protective mineral.

Purpose of the Study:

  • To investigate the novel application of MICP for improving brick properties.
  • To assess the efficacy of Bacillus pasteurii NCIM 2477 in enhancing brick durability.
  • To determine the impact of MICP on brick water absorption.

Main Methods:

  • Utilizing Bacillus pasteurii NCIM 2477 for MICP.
  • Applying MICP to brick surfaces and internal voids.
  • Measuring water absorption of treated and untreated bricks.

Main Results:

  • Calcite deposition was observed on and within the bricks.
  • Treated bricks exhibited substantially reduced water absorption.
  • MICP demonstrated a favorable effect on brick durability.

Conclusions:

  • MICP is a novel and effective method for enhancing brick durability.
  • Reducing water absorption through microbial calcite precipitation mitigates moisture damage.
  • Bacillus pasteurii NCIM 2477 shows promise for construction material improvement.