First‚ the students label the petri dishes‚ with the elements Mg‚ Ca‚ and Al. Next‚ the students place the different elements on the top of the petri dishes and then filled the dishes with water. After that‚ they placed each element in the water and put the top on and recorded what happened. Then they opened the dish a put a drop of phenolphthalein on each element and recorded the reaction. The students discovered that sodium and magnesium reacted‚ but aluminum did not. Sodium turned into a gas when
Premium Water Chemistry Chemical reaction
Many types of projects are possible when you are able to count bacteria. For example‚ you could count the bacteria in drinking water‚ fresh milk‚ old milk that is slightly sour‚ buttermilk‚ yogurt‚ mud puddle‚ lemonade‚ and many other things. Or you may want to know how fast Chlorox kills bacteria. If you add some Chlorox to a culture and count the surviving bacteria at suitable intervals you can plot killing the killing curve and determine whether the killing is single hit or higher order. It will
Premium Milk Water Technical drawing
Victory to see which surface has the most germs. I tested ten surfaces and let the petri dishes grow for five days. Over the five days I counted the spores each day and took pictures every other day. It is amazing how things can look and feel clean but they are actually filthy. It is also crazy how many surfaces we touch every day and how one thing we touch can make us sick. Overall‚ I learned many things about growing bacteria. Hypothesis I think the computer lab keyboard will have the most germs. I think
Premium Bacteria Microbiology Microorganism
- 3 Petri dishes prepared with agar - 1 disinfected swab - 1 bottle of disinfected water - A piece of filter paper - A hole puncher - 4 test tubes - 1 measuring cylinder - 1 pipette with disposable tips - Tetracycline - Clindamycin - Benzoyl peroxide - 1 beaker of water - P. acne bacteria culture - 1 forcep - 1 digital weighing scale - 1 marker pen 1. Before starting the experiment‚ make sure you clean your work area with Chlorox and wear gloves at all
Premium Agar plate Agar Laboratory glassware
The ten Petri dishes that exclusively did not contain an antibiotic in the bacteria culture served as the control. There were ten trials for the control and each level of IV. The experiment began by cleaning the work area and sterilizing it with 70% ethanol. Then trypticase soy agar (TSA) was poured into six groups of 60 Petri dishes (See Appendix 1). The dishes were labeled based on the antibiotic used and were left to dry and solidify at room temperature. After an hour‚ the dishes were placed in
Premium Bacteria Petri dish Agar plate
the rate at which changes happen at the distinctive length of UV introduction. As the exposure time of UV light increased‚ the red-pigmented bacteria colonies turned white due to mutation.Therefore‚ both growth and mutation in the bacteria are negatively affected by increasing exposure of UV light. Consequently‚ both development and
Premium DNA Evolution Gene
Conclusion In part A of this experiment‚ we transformed the bacteria into an antibiotic resistant form by inserting a plasmid into it. We used heat shock in order to make the bacteria capable to uptake a plasmid in the presence of calcium ions that help disrupt the cell membrane (heat shock is the combination of altering hot and cold). When they are capable of accepting plasmids‚ the bacteria are incubated with plasmids that carry the resistance to a particular antibiotic‚ in this case ampicilin
Premium Bacteria Antibiotic resistance DNA
experiment starts with two petri dishes‚ and we filled each dish with fifty radish seeds. We made our first observations about the seeds that we see. We labeled one petri dish “Control‚” and the other was labeled “Experimental.” The experimental petri dish was put in the freezer for seven days‚ and the control petri dish was set on the counter in the normal-temp classroom for seven days as well. After those seven days‚ the experimental dish was removed from the freezer‚ and we used a graduated
Premium Bacteria Escherichia coli Water
Permanent marker Distilled water Graduated cylinder 3 petri dishes Lab spoons 3 beakers Sodium chloride 3 pipettes 3 grids Procedures: Day 1 Gather and prepare 3 petri dishes. Label each grid with the different percentage of salt in each solution (0.5%‚ 1.0%‚ 1.5%). Measure and cut 1 inch of one-sided tape. Stick the one sided tape on the side of the grid onto the back of a petri dish; repeat this for the other 2 petri dishes. Use the graduated cylinder and collect three 30-ml salt
Premium Water Laboratory glassware Petri dish
Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
Premium Gram staining Bacteria Staining