by shaking it. Then we observed the mixture as it settles for five minutes. We shook the test tube again and took a sample into a slide before it settled. We observed it under the LPO of the compound microscope. ii. We placed cooking oil into a Petri dish‚ and dropped an egg solution into it. We observed it for a formation of a membrane‚ then puncturing it. iii. We placed the evaporated milk in a beaker until it is ¾ full and heat it. We then observe the formation of milk skin at the top. Second
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are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify the basic shape and size of the microbe. In this experiment‚ the microbes E. coli‚ Bacillus sp and an unknown microbe from petri dish 1 were categorised as gram negative or gram positive and their shape was identified. These staining techniques are the correct way to identify the shape and size of microbes. 1.0 Introduction Microbiology is the branch
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0459 g/mole) diffused at a faster rate (dAve = 25.8cm)‚ resulting in the formation of a white ring around the glass closer to the side of the heavier substance (HCl‚ M = 36.4611 g/mole; dAve = 10.8 cm). The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue were simultaneously introduced to each well. Methylene blue‚ having the largest molecular weight‚ displayed the
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are allowed to develop in to human beings.(New World) In the article genetics‚ the author talks about two ways of cloning process. One way is artificial embryo twinning‚ and somatic cell nuclear transfer. Artificial embryo twinning is done by a Petri dish‚ the zygot(fertilized egg) is manually separated‚ then allowed the cell to divide and develop on its own. The embryos are then moved into a surrogate mother. The other the cloning is done is somatic cell nuclear transfer(human-cloning). The first
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CHAPTER I INTRODUCTION 1.1 Background Food is one of human sources of calorie‚ protein‚ fats‚ and nutrition. Yet‚ because of the highly nutritious content‚ food is susceptible to growth of microorganisms. By the presence of microorganisms in food‚ the food is more likely to have shorter shelf life. Thus‚ mostly it is resolved by the addition of antimicrobial substances to food‚ such as condiments and preservatives. Condiments and preservatives could inhibit the growth of microorganisms
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believe animal testing is cruel‚ however‚ there are other methods to use that don’t involve animals. The article “Should Animals Be Used for Scientific or Commercial Testing?”‚ says “In vitro (in glass) testing‚ such as studying cell cultures in a petri
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In conclusion‚ after conducting the lab‚ the emergent properties of water were tested and proved. These trials and experiments were able to verify the adhesion‚ cohesion‚ polarity‚ temperature stabilization‚ solvency‚ and density changes exhibited by water. During the glass and wax paper lab‚ we observed the adhesive properties of water. When a droplet of water touched the glass‚ it dispersed immediately. The droplet placed on the wax paper remained intact and in droplet form. Also‚ when the
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Demo write up: #1 The plastic tablet that gets placed into the water causes the water to spin like a tornado. Then when dry ice is added the water starts to spin and create smoke‚ the color of the water goes from dark green to light green. There is probably a chemical in the dry ice that is reacting with the universal indicator which is causing the substance to change colors. Hydrochloric acid changes the color of the mixture and makes it green to yellow but when you add more hydrochloric acid
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In Vitro is an example of an alternative method. In Vitro is when u test cell cultures in a Petri dish‚ this testing is more relevant than animal testing because human cells can be used. They get human volunteers and they analyze their blood. Paul Furlong‚ professor of clinical neuroimaging at Aston University‚ says that it is very hard to create
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river banks‚ there’s… Do you get it yet? The entire environment is interconnected and depends on level concentrations of every living and nonliving thing to be in balance. The atmosphere is a beaker to a global chemical reaction. The forest is a petri dish allowing all living things to grow and survive. Do absolutely any of you make even a mere attempt to educate yourselves before signing or writing trash like the Bears/Wolves bit or the EPA shut down. That’s right Ted Cruz I’m talking to you and
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