Assignment Task:
Part I: Preliminary Test For Blood Using Saline Solution in differentiating Human blood and Animal Blood
1. How many specimens contain blood?
2. Discuss the principles involving saline solution?
3. After performing the tests and a POSITIVE RESULT was obtained in the alleged blood stain, can you conclude that the stain is really blood? Please explain
Part II: Preliminary Test For Blood Using Benzidine Reagent in differentiating Human blood and Animal Blood
1. How many specimens contain blood?
2. Discuss the principles involving Benzidine?
3. After performing the tests and a POSITIVE RESULT was obtained of the alleged blood stain, can you conclude that the stain is really blood? Please explain.
Part III: Confirmatory Test For Blood Using Teichmann Reagent in differentiating Human blood and Animal Blood.
1. If hemoglobin is present, a small brown rhombic crystal will be observed, please describe the color and shape of the crystal as viewed under the microscope.
2. Photograph the small brown rhombic crystal observed from the test, print and attached below.
3. Which stain confirmed to be blood and why do you say so?