The Effects of Various Factors on the Growth Rate of E. coli

Influence of various factors on the growth rate of E. coli Introduction: When people feel uncomfortable, there are many times in our life (as humans). Your doctor may diagnose them as sick or infected. Sometimes people do not feel clean. This may be a feeling that you are exercising, sweating, or that he / she is not taking a bath in a few days. In any of the foregoing cases bacteria are likely to play a major role in causing human disease or dirty feel.

Various types of nonbiological, "nonbiological and physical factors (Biology, 1027)" are the factors that tries to determine which acts as a catalyst and which limits the growth of E. coli. There are many factors that affect the growth rate of bacteria, but we only focus on three types, ventilation, temperature and nutrition. Optimal growth conditions - temperature, pH, salt concentration, nutrient sources etc - vary by species. Because most microorganisms grow very slowly at such low temperatures, refrigeration can slow food spoilage (Campbell, 507). According to the experiment manual (35), it is said that 37 ° C is the best condition for E. coli and the doubling time of E. coli is about 20 minutes, but based on this information, the higher the temperature, the higher the MGT About

From this laboratory, I learned about temperature, and the growth of E. coli increases as the temperature goes down. In E. coli affected by nutrients, carbon and nitrogen are useful for improving the growth conditions of E. coli, but reaction to yeast extract is not optimal. Due to the effect of aeration, we can say that E. coli does not necessarily need oxygen to grow. In this experiment, there may be some errors in the reading of the spectrophotometer. Students may forget to reset the specification to 20 each time a new sample comes out. Another cause of the error is the effect of temperature on bacteria. Students can have cuvettes long enough to make the solution a little warmer. This may affect the growth curve of the sample.