OBJECTIVE: 1. To distinguish the bacteria abilities to metabolize various substrates and end products formed. 2. To observe the growth of different bacteria species in term of structures and its morphology based on different chemical substance applied. 3. To observe physiological and immunological properties utilized by different species of bacteria. INTRODUCTION: Bacteria biochemical testing can determine the types and numbers in terms of colony forming units of bacteria present in a
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September 12‚ 2012‚ from http://www.earlham.edu/~chem/chem111f03/labs/Experiment%2011.pdf/ The Synthesis of Apirin. (n.d.). Retrieved September 12‚ 2012‚ from http://www.reachoutmichigan.org/funexperiments/quick/csustan/aspirin.htm/ Excess and limiting Reagents. (n.d.). Retrieved September 14‚ 2012‚ from http://www.science.uwaterloo.ca/~cchieh/cact/c120/limitn.html
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VIHS/ Department of Chemistry Chemistry Revision Unit II (Edexcel) (01) a) When lithium nitrate and sodium nitrate are heated separately‚ both decompose giving oxygen gas as one of the products. (i) Which of these two nitrates would decompose at the lower temperature? .........................................................………………………………………….................... (ii) Give the name of any other product formed when sodium nitrate is heated. .....................................................
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Classification Tests for Hydrocarbons Authors: Goldie Ann Tejada‚ Allain Joseph S. Templo‚ Kristinlyn Trajano‚ Kevin Viray‚ Quennie Yu Group 10‚ 2F-PH‚ Faculty of Pharmacy‚ University of Santo Tomas ABSTRACT The test compounds undergo different physical and chemical tests to differentiate their intrinsic physical properties and chemical properties. Physical state‚ color‚ and odor were noted through simple observation. Miscibility of the test compounds were noted through color change or a warming
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an equilibrium shift to the product side using an excess of one of the starting components. In this experiment‚ the excess reagent is acetic acid because it is not expensive and can easily be removed for the reaction. The acetic acid and isopentyl alcohol are removed by extraction with sodium bicarbonate and water. The limiting reagent is isopentyl alcohol. A limiting reagent is completely consumed when
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Synthesis of 3-methyl-3-heptanol In this experiment‚ an example of an organometallic compound which has a carbon magnesium bond will be utilized to form a tertiary alcohol. Grignard reagents have been extremely useful in the synthesis of a large number of classes of organic functional groups. Although Grignard reagents are unstable and decompose in air and moisture‚ they can be prepared and used immediately with moderate difficulty in the undergraduate organic chemistry laboratory. Care will need
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carbohydrates and proteins‚ as well as the action of an enzyme on specific molecules. Introduction Unknown biological molecules can be correctly identified using various tests‚ including colorimetric chemical tests. Colorimetric tests are when a chemical reagent‚ such as Benedict’s‚ is used on a substance or solution and a certain color change occurs as a response. Carbohydrates and proteins‚ two of the larger types of biological molecules‚ also called macromolecules‚ are actually chains of molecules called
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Note: This text is made available courtesy of the Massachusetts Water Resources Authority. We have scanned in the original manual pages and converted the files to text. Unfortunately‚ the pictures were lost and there are some irregularities in the formatting. Our apologies for the inconvenience. TEST 7: TURBIDITY Brief Summary The measure of water’s cloudiness. This test measures turbidity by comparing a turbid sample with a clear sample‚ then adding drops of a special clouding solution to the
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This change occurred because the concentration of the acid and base increased. The observed temperature change in experiment 4 was 3.30 °C‚ which was half of the one that was given to the team. This change occurred because the amount of the limiting reagent in this experiment is half of the one that was given to the team. The observed change in experiment 5 was 7.05 °C‚ which was slightly higher than the one that was given to the team because a different acid was used with different
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to predict whether the reagents would cause an SN1 mechanism‚ SN2 mechanism‚ or both. When predicting the outcome of SN1 and SN2 reactions‚ the nature of the carbon skeleton‚ nature of the solvent‚ and the nature of the leaving group are all taken into account. The experiment called for a two part reaction‚ sodium iodide in acetone (SN2) and silver nitrate in ethanol (SN1). A series of 8 test tubes were each filled with a different substrate to be tested by these two reagents. Approximately 4 drops
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