Cellular stress Silica 4 Amino acids 2 Bacterial viability 2 Bacteriology 2 Biological approach 2 Cell growth 2 Cell viability 2 Colloidal silica 2 Diffusion properties 2 E. coli 2 Escherichia coli 2 Escherichia coli bacteria 2 Functional groups 2 Gels 2 Glycerol 2 Glycine betaine 2 Host materials 2 Host structure 2 Intrinsic property 2 Ionic strength 2 Living cell 2 Living cells 2 Mechanical properties 2 Mechanical stability 2 Molecular precursor 2 Optimization 2 Optimizing silica encapsulation 2 Osmolarity 2 Osmotic stress 2