Spores, BacterialSporesBacillus megateriumPicolinic AcidsBacillusBacillus cereusSterilizationBacillus subtilisMetrizamideHot TemperatureSpores, FungalLanthanoid Series ElementsNeuritesLuminescent AgentsHumidityClostridiumGeobacillus stearothermophilusFood PreservationAlanineMicroscopy, Phase-ContrastSpores, ProtozoanBacterial ProteinsTemperatureBacteriological TechniquesHydrogen-Ion ConcentrationUltraviolet RaysCulture MediaBacteriaPC12 CellsAxonsBacillus anthracisNerve Growth FactorsNerve Growth FactorGrowth ConesNeurons