Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

Abstract

Microbial geotechnology is the use of microorganisms and/or their derivatives to alter engineering properties of soil for improving its stability, strength and stiffness.

Microbial bioformulation: a microbial assisted biostimulating fertilization technique for sustainable agriculture

“…45.5 ± 3.4 and 54.9 ± 3.5 U/ml, respectively. The study confirms that cell-free supernatants of C. freundii and P. azotoformans have participated in the precipitation of CaCO 3 from the cementation solution of urea and CaCl 2 ( Abdel-Aleem et al., 2019 ). Manhas and Kaur (2016) have reported the biocontrol potential of Streptomyces hydrogenans and, cell and culture supernatant against Alternaria brassicicola , the causal agent of black leaf spot and damping-off of seedlings of crucifers.…”

Attachment on mortar surfaces by cyanobacterium Gloeocapsa PCC 73106 and sequestration of CO2 by microbially induced calcium carbonate

“…For example, organic carbon is used by heterotrophs to generate bicarbonate or CO 2 for the following carbonate precipitation. Sporosarcina pasteurii , a ureolytic bacteria strain, hydrolyzes urea to produce CO 2 , contributing to the gradual precipitation of calcium carbonate (Abdel‐Aleem et al, 2019 ; Bang et al, 2001 ). Similarly, myxobacteria produce CO 2 through ammonification to aid carbonate precipitation (C. Rodriguez‐Navarro et al, 2003 ).…”

Conservation State of Two Paintings in the Santa Margherita Cliff Cave: Role of the Environment and of the Microbial Community

“…1 H NMR spectra and 1 H 13 C 2D HSQC were obtained at room temperature using a Bruker Avance II 400 (9.4T) spectrometer operating at 400.15 MHz and 100.62 MHz for the 1 H and 13 C nuclei respectively. 1 H NMR spectra were performed using a 90° pulse 12.3 us on the proton, a delay time of 5s and 128 scans. The HSQC 1 H - 13 C correlation experiments were acquired via double INEPT transfer using Echo/Antiecho -TPPI gradient selection and decoupling during acquisition, 32 scans for 512 experiments.…”

“…The signals of 1 H NMR spectrum (Fig. 7a) at 0.76, 0.87, and 1.01 ppm could be due to the methyl groups of cholesterol.…”