Physical Methods of Control: Heat

Question 1

thermal death point (TDP)

Answer 1

the temperature at which an organism is killed

time stays temp changes

Question 2

thermal death time (TDT)

Answer 2

the time it takes to kill an organism at a specific temperature.
temp stays time changes

Question 3

decimal reduction time

Answer 3

the point at which 90 percent of organism dies

Question 4

cellular effects of dry heat

Answer 4

denatures enzymes, incineration

Question 5

effects of moist heat
pasteurization
autoclaving

Answer 5

most effective

pastur..does not sterilize ..distroys organsims that cause spoilage

Question 6

growth requirements and risks of Clostridium botulinum

Answer 6

a ph near 7 or neutral

causes paralysis of the muscle

Question 7

how spores and cell structure can affect tolerance

Answer 7

endospores

Question 8

autoclave

Answer 8

achieves sterilization

steam under pressure

Question 9

growth requirements and risks of Clostridium botulinum and why destruction of the spores of this organism are the aim of the food industry

Answer 9

it is a spore former
it can survive the heating process, they are strict anaerobes
the food industry wants to get rid of it because of the toxin botulin which can survive the canning proccess