Microbially induced calcium carbonate precipitation (MICP) is a phenomenon based on urease activity of halotolerant and alkaliphilic microorganisms that can be used for the soil bioclogging and biocementation in geotechnical engineering. However, enrichment cultures produced from indigenous soil bacteria cannot be used for large-scale MICP because their urease activity decreased with the rate a...

Cardiogenesis requires the generation of endothelial, cardiac, and smooth muscle cells, thought to arise from distinct embryonic precursors. We use genetic fate-mapping studies to document that isl1(+) precursors from the second heart field can generate each of these diverse cardiovascular cell types in vivo. Utilizing embryonic stem (ES) cells, we clonally amplified a cellular hierarchy of isl...

A meter-scale model test with microbially induced calcite precipitation (MICP) is an efficient method to validate this sustainable soil reinforcement technique. Mechanical and physical testing methods for evaluating the biocementation efficiency of tests are still being explored. In study, a calcareous sand base was treated MICP. The mechanical characteristics base, such as strength, shear-wave...

The governance of uranium tailings aims to improve stability and reduce radionuclide release. In order achieve this goal, the removal solution test grouting were successively carried out using microbially induced calcium carbonate precipitation (MICP) technology. effect MICP on reinforcement synchronous control in discussed. results show that Sporosarcina pasteurii could grow reproduce rapidly ...

Peat soil is an accumulation of partially decayed vegetation, formed under the condition nearly permanent water saturation, which makes high moisture and compressibility as two main features peat. In recent years, lack construction lands diverts researchers' attention to make use marginal grounds, like peatland, after some improvements. The past decade has witnessed a growing interest in microb...

The current study proposes a two-step approach for pore facies characterization in the carbonate reservoirs with an example from the Kangan and Dalanformations in the South Pars gas field. In the first step, pore facies were determined based on Mercury Injection Capillary Pressure (MICP) data incorporation with the Hierarchical Clustering Analysis (HCA) method. In the next step, polynomial meta...

Mixed-integer convex representable (MICP-R) sets are those that can be represented exactly through a mixed-integer programming formulation. Following up on recent work by Lubin et al. (in: Eisenbrand (ed) Integer Programming and Combinatorial Optimization - 19th International Conference, Springer, Waterloo), (Math. Oper. Res. 47:720-749, 2022) we investigate structural geometric properties of M...

Soil biocementation represents an emerging technique that has dominated the development of sustainable and innovative geotechnics during past decade. Despite numerous studies focusing on peak strength behavior ensuing softening response, less is known about stress- time-dependent deformability biocemented geomaterials even though it remains central for most envisaged applications. This study co...

Motivated by recent advances in solution methods for mixed-integer convex optimization (MICP), we study the fundamental and open question of which sets can be represented exactly as feasible regions MICP problems. We establish several results this direction, including first complete characterization mixed-binary case a simple necessary condition general case. use latter to derive non-representa...

Microbially induced calcite precipitation (MICP) is a new and sustainable technology which utilizes biochemical processes to create barriers by calcium carbonate cementation; therefore, this has potential be used for sealing leakage zones in geological formations. The complexity of current MICP models present computer power limit the size numerical simulations. We describe mathematical model su...