Day Two: 1) Gently remove the egg from the vinegar. 2) Using the graduated cylinder measure the amount of vinegar left in the beaker and record it. 3) Record any changes you observe in the egg. 4) After measuring the vinegar pour it down the sink. Rinse and dry out beaker.
4. Submerge the bag in the beaker and leave overnight. 5. Dry off the bag and then record its mass. After this write down the color of the bag and the beaker solutions and then test the bag and beaker solutions for the presence of glucose.
After shredding was complete the pile of cabbage was placed into a stainless steel cook pot. 2. In order to attempt to get the most accurate results I used my fish tank ph test to identify the ph level of my tap water. The result was my tap water is about a 7.8 (slightly higher than the 7.0 that is considered neutral). 3.
Reaction of Ester Synthesis Abstract: The purpose of this lab was to identify scent of each synthesized ester reaction. The water has to be boiled to 60C using a hot plate. When the water was boiled to 60C, the beaker that is filled with water was removed from the hotplate and was set aside. Then there was a test tube rack holder with three test tube placed on it in order, numbered from one to three. In each of the test tube, there were certain liquids poured in.
How many Microbes are Around us: The Effects of Disinfectants and Soaps on the Growth of Microbial Colonies in Agar INTRODUCTION The purpose of this study is to give us an idea of the quantity of microbes that we come in contact and interact with everyday. The secondary purpose of this study is to observe the effects of certain disinfectants and soaps on microbes grown in agar Petri dishes and determine their relative effectiveness. This will be done by three different methods of sampling and comparing the results. Fingers Test The first samples of the microbes were collected by the way of placing one's fingers on the half side of the Petri dish, then washing those same fingers with a soap or alcohol, and placing them on the other half side. The agents used to wash were "Softsoap", "Irish Spring" (bar soap), and Alcohol.
Added 2-3mL of liquid household bleach solution and stirred; solution turned orange. 5. Dipped cotton swab into the salicylic acid hydrolysis solution and wrote a message on a blank piece of flat, white paper and allowed it to dry. 6. Laid the dried message paper on several layers of paper towels for the visualization step to keep the developer solution from soaking on the work surface and surrounding materials.
Add 3.0 mL of 1.0 M Copper (II) nitrate to the test tube. Add 5.0 mL of sodium hydroxide to the test tube; mix the reaction with a stirring rod. Feel the bottom of the tube and write down any changes you notice. Place test tube into the heated beaker and heat the tube until no changes are happening. Write down everything you notice.
The goal of these instructions is to help you in constructing a peanut butter and jelly sandwich. The directions will take you step by step through the process needed to make your sandwich. The following is the list of materials that you will need to properly construct your sandwich; a plate, butter knife, napkin, bread, peanut butter, and jelly. The first thing that needs to be done is take out two slices of bread from the bag. Place the two slices, lying down, on the plate.
The cooked starch acts as the food, which the caterpillar would eat, and the alpha amylase, which is a digestive enzyme common in saliva, is stirred with it to simulate the chewing and mixing of food and saliva which constitutes the first step in the digestive system. Next two pieces of dialyses tubing were prepared by clamping one end of each piece of tubing shut with a clamp, and twisting the other end until it opens. For the purpose of the experiment, the tubing will represent the intestine of the caterpillar.Continuing on, a clean pipette was used to transfer four pipettes worth of the starch and alpha amylase solution into one of the pieces of tubing, while four pipettes of plain starch was added to the other in order to form a control. Next, two large beakers were filled two thirds of the way with distilled water. Four droppers worth of Lugol’s reagent was added two each beaker.
Added one dropper full of Iodine to S+, S-, and tube #2, and agitated the tubes. 7. Added 2 mL of Biuret’s Reagent to P+, P-, and tube #3, gently agitated the tubes and allowed to sit for two minutes. Results: Macromolecules Present in Milk | Test For | Coloration of Positive Control | Coloration of Negative Control | Milk (+ or -) | Red. Sugars | Reddish Brown | Blue | + | Starch | Bluish Black | Brownish | - | Proteins | Purple | Blue | + | Figure 1.