The impact of microorganisms on human affairs Agriculture Food N2 fixation Food preservation Nutrient cycling Fermented foods Animal husbandry Food additives Disease Identifying new diseases Treatment and cure Disease prevention Energy/Environment Biotechnology Biofuels (methane and ethanol) Bioremediation Genetically modified organisms Microbial mining Production of pharmaceuticals Gene therapy for certain diseases
The impact of microorganisms on human affairs
Important Persons in Microbiology History 1684 Antonie van Leeuwenhoek(discovery of bacteria) 1857-1864 Louis Pasteur(lactic acid fermentation, yeast alcohol fermentation, spontaneous generation theory “ swan neck flasks”) 1881-1884 Robert Koch(pure culture, cause of tuberculosis, Koch's postulates, cause of (EEL) cholera 1889 Martinus Beijerinck(concept of a virus) 1929 Alexander Fleming(discovery of penicilin) 1953 James Watson, Francis Crick(DNA structure) 1983 Luc Montagnier( discovery of HIv)
Important Persons in Microbiology History 1684 Antonie van Leeuwenhoek (discovery of bacteria) 1857-1864 Louis Pasteur (lactic acid fermentation, yeast alcohol fermentation, spontaneous generation theory “swan neck flasks”) 1881-1884 Robert Koch (pure culture, cause of tuberculosis, Koch’s postulates, cause of (霍乱) cholera） 1889 Martinus Beijerinck (concept of a virus) 1929 Alexander Fleming (discovery of penicilin) 1953 James Watson, Francis Crick (DNA structure) 1983 Luc Montagnier (discovery of HIV)
Prokaryotic Cell (versus Eukaryotic Cell) Not compartmentalized Cell membranes lack sterols(e.g. cholesterol) Single circular chromosome Ribosomal are 70s with subunits 30S (16S rRNA) 50s(5s& 23s rRNA)
Prokaryotic Cell (versus Eukaryotic Cell) • Not compartmentalized • Cell membranes lack sterols (e.g. cholesterol) • Single circular chromosome • Ribosomal are 70S with – subunits 30S (16S rRNA) – 50S (5S & 23S rRNA)
2. Shape and arrangement Coccus or Cocci R pirillum or spirilla Spirochete Budding and appendaged coding and appendaged t Filamentous
Coccus or Cocci Rod Spirillum or Spirilla Spirochete Budding and appendaged Filamentous 2.Shape and arrangement
Procaryoic cell organization Flagello Granular inclusion Ribosomes Cell aQ wall / outer membrane(if present Cytoplasmic Cytoplasm Capsule membrane Nucleoid Mesosome
Procaryoic cell organization