2. Why is it important to stop the chromatograph before the solvent reaches the top of the paper ? Because if the solvent gets to the top, I could miss the measuring points because they would keep moving. 3.Why is
Changes in pH break the delicate bonds that maintain an enzyme's shape. An enzyme will unravel, or denature, and become useless in a different pH. The FDA should not approve this enzyme to be safe for people. I say this because for the FDA to approve it, Lactex must be able to survive a wide range of pH and temperatures that it will be exposed to within the digestive tract. The path a drug travels from a lab to your medicine
Then horizontally on the line I just drew I marked off 9 spaces 1.5 cm apart. On one sheet inside the spaces I marked B1, then B2 in the next space and so on for the FD&C food color dyes, at the end I marked KS and KG for Kool-Aid strawberry and grape. On the second sheet of Chromatography filter pater I did the same thing. I made a 1 cm line from the bottom and spaced it off in 1.5 cm spaces. I marked those with the Store Food Colors, the M&M colors and the unknown color.
Materials & Methods Materials: · Scale · 4 6” Dialysis Tubing · 4 Transfer Pipets · Sugar · Scissors · Rubber Bands · 4 Same-Sized Coffee Cups · 250ml Graduated Cylinder · Tape Measure · Sauce Pan · 3 600ml Containers · Plastic Covering · Spoon Methods: 1.) Place 4 6” pieces of dialysis tubing into coffee cups full of tap with and leave them for two hours prior to beginning the experiment. 2.) As you wait, prepare your three sugar solutions. For the first solution, pour 5 grams of sugar into 250ml graduated cylinder and add water up to the 250ml mark.
In Exercise 4A: Plant Pigment Chromatography, the experiment was demonstrated by the teacher. We needed a 50-ml graduated cylinder with 1 cm of solvent in the bottom. One piece of filter paper needs to cut, so that it touches the solvent. Cut the end to a point and draw a pencil line 1.5 cm above the point. A coin needs to be used to extract pigments from the spinach leaf cells.
The purpose of this lab is to focus on how to make zinc iodide in a different way using compounds instead of elements, which are barium iodide and zinc sulfate. We will see if the reaction between these two compounds will occur and make a prediction by writing a chemical equation. The procedures for this lab are to place a small test tube inside a 50mL beaker and weigh it. Then, using a spatula, add 0.45±0.03 g of zinc sulfate heptahydrate into the small test tube and record the mass. After that, dissolve the sample in 2 mL of deionized water and shake the test tube for 1 to 1 ½ minutes to dissolve the solid.
2. Why is it important to stop the chromatograph before the solvent reaches the top of the paper ? Without knowing where the solvent reaches
The seaweed will be cut and weighed (6 grams) and transferred into 150 mL solution. Using 40 mL of distilled water the seaweed is heated just under boiling for five minutes. After cooling, a filter will be used to remove the seaweed from the extract. The goal is to transfer 2-3 mL of filtrate into the evaporating dish. We now slowly pour the solution into a funnel with filter paper.
BACKGROUND: For these experiments a 96-well plate was used. Each chemical listed would be put into their own well of 2 drops of each chemical unless instructed otherwise. After the chemicals were each dropped into the wells they were stirred with a different toothpick each time (to not cause cross contamination) and then was observed over a white piece of paper and then a black piece of paper. For each reaction I recorded the well number and took detailed notes on the reactions observed. After the first two tests done with BTB I hypothesized that acids would turn BTB yellow and that bases would remain blue.
The dentist could have been more considerate and explain to the student that the whitening process can only be done certain times and cannot be done when it is important for her. Explanation of the water pick can help the patient understand that it will help her and she can improve her hygiene one her own instead of keep returning. Scenario 3—Physical Therapy o What patient compliance issues are evident in this scenario? The patient should listen to the doctor to help lower the triglycerides in his blood stream and this process will help lower his cholesterol. The patient listening to the doctor’s Advice about the special diet and to avoid red meat is very advisable for this process.