Silica GelSilicon DioxideGelsChromatography, Thin LayerChromatography, High Pressure LiquidFermentationGene Expression Regulation, BacterialChemistry, PhysicalStreptomycesPhysicochemical PhenomenaBacterial ProteinsCulture MediaSilicosisSigma FactorAdsorptionStereoisomerismChromatographyMagnetic Resonance SpectroscopyChromatography, GasHydrogen-Ion ConcentrationSpectrophotometry, InfraredMolecular StructureBenzylammonium CompoundsEscherichia coliCapillary ElectrochromatographyIndicators and ReagentsBoric AcidsEthylenethioureaSpectrophotometry, UltravioletMolecular Sequence DataDensitometryCoccidiostatsForssman AntigenPlant ExtractsSilver NitrateHexanesSpectrometry, Mass, Fast Atom BombardmentChemistryChemical PhenomenaMass SpectrometryMetals, Rare EarthMethodsAnti-Bacterial AgentsElectrophoresis, Gel, Two-DimensionalSpectrophotometry, AtomicEnzymes, ImmobilizedGenes, BacterialSurface PropertiesCerebrosidesCountercurrent DistributionChromatography, LiquidBase SequenceRNA, BacterialGas Chromatography-Mass SpectrometryKineticsSolventsMethanolMutationPorosityNiobiumSilanesMicrochemistryMicroscopy, Electron, ScanningEscherichia coli ProteinsSolid Phase ExtractionTranscription, GeneticStigmasterolFungi