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.
An example is Tetanus caused by Clostridium tetani. An endotoxin is part of the outer portion of the cell wall of gram-negative bacteria. They are released when the bacteria die and the cell wall breaks apart. They differ from exotoxins in that they are lipopolysaccharides not proteins.n endotoxin is part of the outer portion of the cell wall of gram-negative bacteria. They are released when the bacteria die and the cell wall breaks apart. They differ from exotoxins in that they are lipopolysaccharides not proteins.