Introduction Problem Â Â Â Â Â Â Â Â To determine the effect of ten diverse antibiotics on deuce different types of bacteria. I pull up stakes attempt six antibiotics on Escherichia coli, and six antibiotics on atomic number 5 subtilis. On Escherichia coli I will rill tetracycline, chloramphenicol, furadantin, nalidixic acid, triple sulfa, and kanamycin. On Bacillus subtilis I will test streptomycin, erythromycin, novobiocin, tetracycline, chloramphenicol, and penicillin. As a boldness observation, I would too equal to see if Bacillus subtillis shows impedance to penicillin. The use of penicillin is being cut down because of the resistance legion(predicate) types of bacteria are developing against it. Â Â Â Â Â Â Â Â Hypothesis Â Â Â Â Â Â Â Â My dead reckon is that penicillin will inhibit the most growth against Bacillus subtilis, and that tetracycline will stop Escherichia coli more effectively than the others. Rationale Â Â Â Â Â Â Â Â I facial expression that this experiment is valid because it shows how different antibiotics oppose to different types of bacteria. It also points out the fact that not alone antibiotics work the kindred or that they work at all on all types of bacteria.
Materials 1 feeding bottle of tryptic soy agar 1 culture of Escherichia coli 1 culture of Bacillus subtilis 4 stereotypic petri yellowish pinkes 1 pack of test discs 2 unfruitful pipettes 2 tubes of physiological saline 1 forceps 1 wax pencil 2 sterile swabs Method 1. decompress the cap of the tryptic soy agar to allow it to vent. localise the bot tle in a peeing bath at degree centigrade ! degrees Centigrade so that the water level reached the level of the medium. The agar will melt in about 20 minutes. 2. piecemeal collected the medium to about 45 degrees Centigrade by allow the water bath cool. Then let the medium mould for 10 minutes. 3. Pour two plates for each species of bacteria. The agar should be roughly 5 mm deep. Cover each petri dish at once after poring... If you want to get a teeming essay, put in it on our website: OrderCustomPaper.com
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