Spores, Bacterial nonhuman 30 article 24 Bacillus subtilis 18 Bacterial Proteins 18 bacterial spore 18 priority journal 18 controlled study 16 sporogenesis 16 Bacteria (microorganisms) 14 Bacillus thuringiensis 10 Osmotic Pressure 10 Genes, Bacterial 8 Sodium Chloride 8 bacillus thuringiensis 8 bacterial growth 8 bacterial protein 8 bacterium culture 8 Article 6 Bacillus sphaericus 6 Mutation 6 Osmolar Concentration 6 Posibacteria 6 Spores 6 Support, Non-U.S. Gov't 6 Time Factors 6 bacillus subtilis 6 bacterial membrane 6 culture medium 6 genetic transcription 6