In starch test describe and explain the change color in results: A. Yellow to Brown B. Blue to Black
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In starch test describe and explain the change color in results:
A. Yellow to Brown
B. Blue to Black
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- What does translucent spot mean with regards to lipid? Identify the control for this test. 1. CheeseBy alkaloidal reagent Place 3mL of egg albumin solution in each of the two test tubes, to one tube add 1 – 2 ml of tannic acid solution and to other one picric acid. Describe the appearance of the protein solutions in each of the tubes after addition of the alkaloidal reagents.What does translucent spot mean with regards to lipid? Identify the control for this test. 1. Oil 2. Cheese 3. Water 4. Cheese
- Discuss the significance of the following processes and what constituent is being determined: a. Borntragers’s test b. Bate-Smith and Metcalf method c. Wilstatter “cyanidin” testState the difference between reducing and non-reducing sugars. Give one test to show the difference between reducing and non-reducing sugars. (Give the indication of positive test, such as color, precipitate formation, etc.). Discuss the properties of potassium iodide solution, and how it results in the detection of starch. . Explain the meaning of each color that results in Starch Test, such as: 11.1 Yellow to brown and; 11.2 Blue to black.
- What does translucent spot mean with regards to lipid? Identify the control for this test. 1. WaterThe reults for the macroscopic part: 0.30M glycerin – solution was translucent (could see text behind the test tube) 0.15M NaCl – solution was opaque (could not see text behind the test tube) 0.30M NaCl – solution was opaque (could not see text behind the test tube) 0.15M glucose – solution was translucent (could see text behind the test tube) 0.30M glucose – solution was opaque (could not see text behind the test tube) 0.30M Urea – solution was translucent (could see text behind the test tube) Results for microscopic part: 0.30M glycerin – no cells present 0.15M NaCl – normal sized cells 0.30M NaCl – crenated (shrunken and star-shaped) cells 0.15M glucose – no cells present 0.30M glucose – normal sized cells 0.30M Urea – no cells present Determine the osmolarity (hypoosmotic, isosmotic, or hyperosmotic) and tonicity (hypotonic, isotonic, hypertonic) of the following solutions.In which solutions did the osmolarity NOT match the tonicity? For those solutions, why did the osmolarity…. How much patient serum is needed to make a 1 mL 1:25 dilution? b. If a test procedure requires that the patient serum be diluted with 7 parts of distilled water, how much diluent should be used if the required serum volume is 250 µL? What is the final volume and dilution factor of the solution? c. How much NaCl in grams and distilled water is needed to make 10 mL of 0.9% NaCl solution? d. What is the final dilution factor of a solution if 500 µL serum is diluted with 9.5 mL of distilled water?
- Distinguish between each of the following pairs of substances by giving both the test and the results expected of each substance: 1. albumin and gelatin 2. tryptophan and tyrosine 3. alanine and tyrosineAn unknown sample was tested if there is a presence of lipid, after the test it shows that it is positive for translucent test, soluble with chloroform, didn’t produce a pungent odor in acrolein test, didn’t produce red color for Baudouin Test, and violet color disappears in Huble’s Test. What is the unknown sample? Explain your answer.The stain used in the starch hydrolysis test: a.Does not stain the media surrounding positive organisms b.Tests for the presence of phospholipase c.Is the same stain used in the capsule stain