3-1 - Bacterial Physiology Bacterial Bacterial chemical...

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Bacterial Physiology Bacterial Physiology
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Bacterial chemical components Bacterial chemical components Water : free water and compound water. Inorganic salt : phosphus, potassium magnesium, calcium, nitrium,etc. Protein : 50%-80% of dry weight according bacterial kinds and age. Sugar : mainly distributing in cell wall and capsule.   Lipids : composed of lipid, fatty acid, wax, etc. Nucleic acid : RNA and DNA.
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Environmental factors affecting Environmental factors affecting growth of bacteria growth of bacteria 1. Nutrients 2. Temperature 3. hydrogen ion concentration ( pH ) 4. Oxygen Requirements: 氧氧氧氧氧氧氧 5. Osmotic pressure 氧氧氧
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Bacterial Nutrition and Growth Bacterial Nutrition and Growth Classification based on their source of carbon 根根根根根根根根根根根根根根根根根根根根根根根根根根根根根 1. Autotrophs 氧氧氧 2. Heterotrophs 氧氧氧 :saprophytes 根根根 ; parasites 根根根
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Nutrient requirements of Nutrient requirements of bacterial growth: bacterial growth: 1. Water 2. Carbon source 3. Nitrogen source 氧氧 4. Minerals 氧氧氧 5. Growth factors 氧氧氧氧氧 that a cell must have for growth but cannot synthesize itself . Such as amino acids, purines 氧氧 , pyrimidines 氧氧 , and vitamins 氧氧氧氧氧氧 X 氧氧氧氧氧氧氧氧氧 V 氧氧氧氧氧 氧氧 氧 Ⅰ Ⅱ
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Temperature Temperature Psychrophilic forms 氧氧氧 (15-20 ) Mesophilic forms 氧氧氧氧 30-37 氧 include all human pathogens and opportunists. Thermophilic forms 氧氧氧氧 50-60
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pH pH Neutrophiles 根根根根根 5 to 8 根 Acidophiles 根根根根根 below 5.5 根 Alkaliphiles 根根根根根 above 8.5 根
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Gas Requirements Gas Requirements
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Obligate anaerobes Obligate anaerobes
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3-1 - Bacterial Physiology Bacterial Bacterial chemical...

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