In 1928, bacteriologist Alexander Fleming was studying Staphylococcus, a type of
bacteria that can cause serious infections. He grew the bacteria in small containers called
petri dishes. One day he noticed that mold had accidentally been introduced into one of
the petri dishes and was startled to see that there were no bacteria around the moldy
area. Fleming correctly deduced that the mold had had an antibacterial effect; somehow
it had prevented the bacteria from growing. Fleming identified the mold as the strain
Penicillium notatum and called its antibacterial ingredient-which he was unable to
successfully extract-penicillin. Fleming's discovery of penicillin's unique effect led to the
eventual finding that it could be used to treat infections. Several years after his initial
observation, scientists built on his work by extracting penicillin from mold and
demonstrating its effectiveness as a treatment.
Answers: 1
English, 21.06.2019 13:30
What do the details in this excerpt readers to infer about the barbarians?
Answers: 1
English, 21.06.2019 14:00
Which of the following is a skill that would contribute to someone’s academic identity? a. researching b. marketing c. negotiating d. networking
Answers: 2
English, 22.06.2019 00:50
3. of all the characters highlighted in the works included in this unit, which one did you relate to or identify with the most in terms of his or her struggles and conflicts? why? what was it about this character that made him or her affect you as he or she did? be sure to point to specific examples from the work to support your response.
Answers: 2
English, 22.06.2019 01:30
From the glass menagerie: "suspended in the mist over berchtesgaden, caught in the folds of chamberlain's umbrella." who was chamberlain? a.paul chamberlain: tom's father b.neville chamberlain: prime minister of great britain. c.pedro chamberlain: amanda's drunkard husband d.cornelius chamberlain: gentleman caller for laura
Answers: 1
In 1928, bacteriologist Alexander Fleming was studying Staphylococcus, a type of
bacteria that can...
English, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
History, 26.01.2021 07:10
English, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10
Mathematics, 26.01.2021 07:10