Days of Hot Weather in Ottawa. Ottawa usually has 12 days a year with temperatures in the low 30s Celsius. About twice a decade, a day heats up above 35 degrees Celsius (95 Â°F). The 30-degree weather can show up here anytime from June to September, and occasionally as early as April. Days per month in Ottawa over 10, 20 or 30 Â°C.
1 Exotoxins are proteins released by both Gram-positive and Gram-negative bacteria. 2  all major Gram-positives produce exotoxin. 3  except Listeria monocytogenes (produces endotoxin). 4  exotoxins are not heat stable.
Difference Between Endotoxin and Exotoxin. Toxigenesis is the process of producing toxins by pathogenic bacteria. It is one of main mechanisms of developing diseases by bacteria. Two kinds of toxins; i.e. endotoxins and exotoxins are produced, and those can be distinguished by their chemical nature.