correct forceps, pick up one paper disk from the distilled water petri dish and place it in the center of the corresponding agar plate. Repeat this process 3 more times but use the household products being tested and the correctly labeled petri dish. Make sure that after this step the Petri dishes are closed. A good technique for putting the parafilm on for the next step would be to place a part of the parafilm on the lid of the petri dish and place your finger on it. Then, stretch the parafilm out
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Title: (wait till the end) “America’s prisons have become warehouses for the severely mentally ill”- Dahlia Lithwick The institutionalization of mental health care programs has resulted in a high number of mentally ill people ending up incarcerated without receiving the treatment they require due to the fewer funds provided by the government for the proper facilities needed. Dorathea Dix fought for the establishment of psychiatric hospitals. Due to budget cuts and changes in administration, the funds
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planarian to various substances affect their appetite and food consumption? Tools/Materials- Multiple planarians 1% Sucrose 1% Alcohol 1% and 10MM Nicotine Spring Water Planarian food (egg yolk of a boiled egg) Petri dishes Dropping pipette Timer Tape (optional) for labeling the petri dishes Pen Observation notebook Camera (optional) Hypothesis- If the planarians are exposed to stimulants, then their appetites will increase. However, when exposed to depressants, they will eat less. Experiment-
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Brandy had no effect on petri dish B as no bacteria was present. Handy Andy decreased the bacteria growth in Petri dish A by 57.1% over a period of 7 days. Handy Andy had no effect on petri dish B as no bacteria was present. Dettol hygiene hand wash decreased the bacteria growing in petri dish A by 17.1% over a period of 7 days. Dettol hygiene wash has no effect on petri dish B as no bacteria was present. 15.) My hypothesis was incorrect as Brandy
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damp soil) then more sowbugs will move into the moist soil when given the option between moist and dry areas. If terrestrial isopods such as sowbugs (Porcellio scaber) prefer dark habitats then more sowbugs will move into the dark portion of the petri dish when given the option between light and dark. Null and Alternative Hypothesis Null 1: There is no significant difference between the number of sowbugs who move into the moist soil in comparison to the number who move into the dry soil. Alternative
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using ethanol. The cylinder contained 2 ml of distilled water, we then dispensed that water into a clean petri dish containing agar jelly that contained 5% beef broth to provide the culture nutrients. We then placed that dish in an incubator set at 37* Celsius, which is the same temperature found inside of a human body. We replicated these steps again sterilizing everything to prepare another petri dish, and placed it in the incubator. For the control in our experiment we used no martian dirt; we only
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My hypothesis for this lab is that the larger amount of calcium added into a petri dish will result with a faster hatching rate due to the extra nutrients. The independent variable of this lab is the concentrations of calcium, while the dependent variable is the brine shrimp eggs hatch rate. The constant is petri dish A that will have no calcium added. I plan on measuring this rate through observing the individual petri dishes every twelve hours under a magnifying glass and counting the number of
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RH). The tea aphids used in this experiment were young nymphs. One first instar, starved for 24h, was placed into Petri dish (diameter 9cm and height 2cm) with a soft writing brush, tea aphids along with fresh host plant leaf were also provided. The open end of Petri dish was covered with porous pvc film. Densities were set as followings: 5, 10, 15, 20, 25, 50 and 100 aphids per Petri dish. For each density, three replicates for predator and control treatment were designed. The total aphid consumption
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1. The various contaminated areas in school according to the acquired class data was the front door entrance handles and the biology classroom doorknob. In the individual experiment conducted revolving the four locations in table 2 the front door handles contained a greater amount of bacteria than the AC vents and the office water dispenser. The least contaminated areas according to the class data was the cafeteria microwaves and after further observation a question was made, could the constant
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Next, the dilute samples were used to grow bacterial colonies on agar gel in petri dishes; specifically, Brain Heart Infusion Agar (BHIA) was utilized to sustain the bacterial colonies. However, before streaking any plates, three of the five plates were treated with antibacterial agents. The antibiotic treatment process involved a sterile transfer pipette which was used to transfer each specific agent to the BHIA in the petri dishes.
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