The Test And Lab Report - 1644 Words

Through out the semester we had conducted various tests and labs, we will use the knowledge we attained from previous exercises to trace out an unknown organism as the purpose for this lab report. Following the random selection of organism number 51, I started out using the â€Å"Gram- Positive Cocci in clusters† flow chart which comes from the class lab manual. After performing a hand full of tests, I came to a conclusion that organism 51 that I had chosen was St. mitis. I noticed that this organism was streptococcus but had both an individual and a chain like arrangement. The noted streak plate colony growth was round in shape, slightly elevated, smooth in texture and translucent or partially transparent. The initial test that I had performed was the Gram staining test. I conducted this test a total of three times for final results. The Gram staining test is performed to differentiate between the two major categories of bacteria: Gram positive and Gram negative. In other words, the procedure enables bacteria to retain color of the stains which is based on the physical and chemical properties of the cells wall. The basic four step process of gram staining are: Application of the primary Crystal Violet stain onto a bacterial culture that had initially been heat fixed. The positive CV ions interact with the negatively charged bacterial components and happen to stain the bacterial cells purple. After rinsing the slide off with a gentle pressure of water, addition of Iodine onShow MoreRelatedLab Report On Chemical Tests1279 Words   |  6 Pages 1.4 Physical Tests 1.4.1 Organoleptic Tests This will be used to determine the color, odor, and physical appearance of the extracted substance. 1.4.2 Solubility Tests Six hundred milligrams of fucoidan isolate will be weighed and divided into 6 tubes, 100 mg each. It will then be dissolved in 1mL of each individual solvent such as distilled water, ethyl alcohol, chloroform, 1M Hydrochloric acid, 1M Sodium Hydroxide, and Diethyl ether. 1.5 Chemical Tests The chemical tests that will be performedRead MoreLab Report for Food Test1465 Words   |  6 Pagesaldehydes are known as aldoses. Sugars that are ketones are known as ketoses.Glucose and galactose are example of aldoses while fructose is an example of ketoses.There are few test can be done for testing these sugar to show or prove are they reducing sugar or non reducing sugar.Example of the test that can be done is Benedict test. 1 In plant,glucose is stored as the polysaccharide starch.Example of food that rich in starch is oat,cereal,rice and corn.Starch can be divided intoRead MoreFood Tests Lab Report813 Words   |  4 PagesFood Test 1: Test for Glucose – with Benedicts solution Benedicts solution is used to test for simple sugars, such as glucose. It is a clear blue solution of sodium and copper salts. In presence of simple sugars, the blue solution changes color to either green, yellow or brick-red, depending on the amount of sugar. Method 1) Mix smalls amount of each food sample (i.e., Egg lumen, cylindrical piece of potato tuber, bread crump and crisps) in different test tubes with distilled water to make aRead MoreLab Report On The Test Tube1483 Words   |  6 Pageswas added to the test tube using the measuring cylinder. 3. 2 mL of the yeast suspension was added to the test tube solution using a pipette. 4. The end of the test tube was inverted using one s thumb and a rubber stopper to thoroughly mix the test tube contents. 5. The measuring cylinder was filled with water and placed upside down into a bowl filled with water leaving some space for the end of the delivery tube to be placed. After the measuring cylinder was placed in the test tube, it was clampedRead MoreTensile Test Lab Report2204 Words   |  9 Pagesused. The tension test is one of the laboratories which help students develop their knowledge in this course by practice. During the laboratory a Tinius Olsen Tension Test equipment was used, and the test samples were from low and high carbon steel and timber with grains parallel and perpendicular to the load. Test equipment and materials The test equipment used during the laboratory is one of the Benchtop Materials Testing Machines made by Tinius Olsen. This machine can test different types ofRead MoreSieve Analysis Test Lab Report1054 Words   |  5 Pagesbalance or scale used in testing fine and coarse aggregates shall have readability and accuracy as follows: For fine aggregate, readable to 0.1 g and accurate to 0.1 g or 0.1 % of the test load. For coarse aggregate, or mixtures of fine and coarse aggregate, readable and accurate to 0.5 g or 0.1 % of the test load. 2. Sieves – the sizes and apertures appropriate to the specification of the material being tested, complying with BS 410: For coarse aggregate, standard sieve size of 50.0 mm,Read MoreEssay on Step Test Lab Report780 Words   |  4 PagesVerifying Differences Between Athletes’ Heart Rates And Non-Athletes’ Heart Rates By Using Step Test Introduction: Different people have different heart rates because of many reasons such as health condition, smoking, working out, among others. This step test is used to compare and figure out the differences between athletes’ heart rates and non-athletes’ heart rates before and after the test. Kuno Hottenrott stated that the normal average heart rate of people ranges from 40 to 100 beats perRead MoreTest Tube Mystery Lab Report912 Words   |  4 Pages10 Test Tube Mystery Introduction: The students were handed 10 test tubes with no identification. The students were supposed to design a method in determining what chemical was in each test tube. The list of chemicals is CuSO4, NH4Cl, NaOH, AgNO3, KI, H2SO4, NaBr, CaCl2, HCl, and Pb(NO3)2. The students are expected to determine the chemicals using physical properties, litmus paper, solubility, and the process of elimination. Physical properties, such as the color, can be determined by sight. LitmusRead MoreHow to Write a Lab Report in Microbiology1637 Words   |  7 PagesWRITE AN UNKNOWN LAB REPORT IN MICROBIOLOGY GENERAL Unknown reports in microbiology are written in scientific format. Scientific writing is written differently from other types of writing. The results of the exercise or experiment are what are being showcased, not the writing. The purpose of scientific writing is not to entertain, but to inform. The writing should be simple and easy to understand. There is a specific style that must be followed when writing scientific reports. ScientificRead MoreMicroscope Lab Essay701 Words   |  3 Pages Virtual Lab Unit 3 1. Briefly describe the steps required to  aseptically  transfer bacteria from an unknown to a tube of liquid broth.   You might have to research this using the T button (Tell Me More About...) To aseptically transfer bacteria from an unknown to a tube of liquid broth you have to flame the loop or wire before you begin to sterilize it. You then remove the caps from the tubes and flame the mouths of the tubes to prevent air-borne contamination. When all this is done, you have