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- Discuss the correct laboratory technique in using the centrifuge for qualitative analysis. Give two tips on its proper use.
- Explain how calcium ions are confirmed present in a solid salt by using flame test.
- Discuss a method to confirm the presence of a) phenol and b)
ketone in a test compound. - How are proteins confirmed present in a sample? Explain the laboratory process.
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- Provide the Principles and detailed procedures of the following tests for the "Color Reaction of Proteins". 1. Hopkins-Cole Test 2. Sulfur Test 3. Heller's TestWhich is the better reagent for the clinical test between Fehling's solution and Benedict's solution? Explain briefly the answerAnswer the following questions (not more than 5 sentences/question). Discuss the correct laboratory technique in using the centrifuge for qualitative analysis. Give two tips on its proper use. Explain how calcium ions are confirmed present in a solid salt by using flame test. Discuss a method to confirm the presence of a) phenol and b) ketone in a test compound. How are proteins confirmed present in a sample? Explain the laboratory process.
- In a tabular form, enumerate other chemical qualitative tests for carbohydrates, discuss its principle, chemical reagents employed and its positive test result.Please help me to find positive or negative results for the Oxidase lab test for microbiology, recognize the species and explain the reason behind the result.How would you make two-fold serial dilutions such that the last tube is a 1:32 dilution of the original, concentrated material? Assume that you need to have at least 500 µl of each dilution, and you should be able to perform the dilutions in microfuge tubes with a maximum capacity of 1.5 ml.
- For a simple routine qualitative analysis, why is an early morning sample of urine used for the tests, and not a sample collected after a meal? Explain briefly.What is the purpose of the sodium thiosulphate in the testing of treated water?Will disaccharides and polysaccharides give positive results in Molisch test? How?
- Differentiate Wintrobe from Westergren regarding accuracy of the test in a tabulated order.What is the fluid thioglycollate medium? Please explain the testing and its results and the chemistry behind it?What is the result for the yellow tube of Methyl red test? What must the pH be in each tube? What is the reagent used in this test? What media is used? Describe the biochemical abilities of these organisms .