MIC 301 Lecture Notes - Lecture 5: Osmotic Pressure, Microbiology, Heterotroph

• School: University at Buffalo
• Department: Microbiology And Immunology
• Course: MIC 301
• Professor: Dombroski Darlene

Document Summary

Environmental factors affecting bacterial growth: nutrients, presence or absence of gases, temperature, ph, osmotic pressure, nutrients. Nutrients required for: a. generation of energy b. synthesis of cellular materials. Essential or common chemical nutrients: h2o, carbon, nitrogen, sulfur (sulfate, phosphorous (phosphate, minerals. Carbon source autotrophs co2 heterotrophs organic molecules. Energy source chemotrophs (oxidation-reduction) reactions of chemicals phototrophs light. *chemoherterotrophs the bacteria that cause illness. most medically important bacteria catabolize host energy source : aerobic respiration/anaerobic respiration/fermentation: presence or absence of gases. Aerobic anaerobic oxygen present oxygen depleted obligate aerobe 21% o2 obligate anaerobe microaerophile 2-10 % o2 aerotolerant anaerobe facultative anaerobe. Requirement of enzymes superoxide dismutase and catalase. Function of enzymes breakdown toxic intermediates of aerobic metabolism: superoxide radical (o2, peroxide anion (o2. Psychrophiles (cold lovers) (0 o - 15 o c) Mesophiles (middle lovers) (20 o - 40 o c) Thermophiles (heat lovers) (45 o - 70 o c) Minimum temperature assembly/synthetic protein processes: ph.