BM1000 Lecture Notes - Lecture 26: Microorganism, Blood Gas Tension, Phospholipid
Document Summary
Different populations of microbes are associated with different ecosystems. Different ways microbes obtain their required nutrients from environmental sources. The effect of environmental factors on microbial survival. Microbes are adapted for growth under a wide range of physical conditions. These physical conditions dictate the type & availability of nutrients. All cells need access to large amounts of carbon, nitrogen, phosphorus, sulphur and oxygen (macronutrients) to build macromolecules. Growth rate will depend n the amounts of nutrients in the environment. One key nutrient, available in the lowest amount, will dictate how much growth can occur over time (limiting factor) Microbes divided into 4 types based on their source of carbon and energy. Effects of ph on microbial growth: ph affects macromolecule structures and ph affects macromolecule structures and transmembrane electrochemical gradients. Each microbe will have an optimal ph range for growth. Temperature can also effect macromolecular structure, membrane fluidity, and enzyme function. Different microbes have different optimal temperature growth ranges.
