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What is the independent variable? What is the dependent variable? Suggest a control for this experiment?

What is the independent variable? What is the dependent variable? Suggest a control for this experiment?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What is the independent variable?

What is the dependent variable?

Suggest a control for this experiment?

Objective: To screen three LAB (Lactobacillus plantarum, Pediococcus acidilactici, and Pediococcus pentosaceus) for antimicrobial activity against the foodborne pathogens Listeria monocytogenes, Salmonella, and Escherichia coli. Methods: 1 ml of the pathogen was placed into a petri dish. Then, 15-20 ml molten tryptic soy agar (TSA) tempered to 50°C was added. When the TSA solidified, a loopful of LAB was spotted onto the agar. Plates were incubated at 35°C for 24 hours then the zone of inhibition was measured from the boarder of the bacterial colony to the perimeter of the clearing. Results: L. monocytogenes Salmonella E. coli 0157:H7 2/26/14 ts L plant2 ECO157 H7 2/26/14 ts 18.0 2/26/14 ts 10.6 12. P. pento2 ECO157 H7 2/26/14 ts 12.3 14.5 of P. pentosaceusS P. acidilactici Lb. plantarum
Transcribed Image Text:Objective: To screen three LAB (Lactobacillus plantarum, Pediococcus acidilactici, and Pediococcus pentosaceus) for antimicrobial activity against the foodborne pathogens Listeria monocytogenes, Salmonella, and Escherichia coli. Methods: 1 ml of the pathogen was placed into a petri dish. Then, 15-20 ml molten tryptic soy agar (TSA) tempered to 50°C was added. When the TSA solidified, a loopful of LAB was spotted onto the agar. Plates were incubated at 35°C for 24 hours then the zone of inhibition was measured from the boarder of the bacterial colony to the perimeter of the clearing. Results: L. monocytogenes Salmonella E. coli 0157:H7 2/26/14 ts L plant2 ECO157 H7 2/26/14 ts 18.0 2/26/14 ts 10.6 12. P. pento2 ECO157 H7 2/26/14 ts 12.3 14.5 of P. pentosaceusS P. acidilactici Lb. plantarum
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