In this lab‚ we extracted spinach pigments‚ and analyzed what colors of light these pigments absorb. By using TLC plate‚ hexane and acetone‚ I separated the pigments of spinach‚ and discovered that the main pigments were green and yellow. This works because with different polarities‚ pigments move at different rates. Hexane and acetone were also used to separate chlorophyll and carotene from spinach. Since they are polar‚ they can separate organic and inorganic things. From the experiment‚ I know
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blue to light green to greenish yellow to orange and lastly reddish brown. b) In a positive test for starch the colour of the substance would change to black c) In a positive test for protein the colour of the substance would be pink or purple/violet d) In a positive test for lipids the substance would leave a translucent stain on the brown paper bag 2. The purpose of testing the four test tubes was to ensure that the colour change that occurred in the substance was due to a chemical change
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volume‚ mass‚ and density of objects and liquids. Time Allocation: Allow 2 hours for this experiment Materials Materials Student provides Label or Box/Bag Qty 1 1 1 1 1 LabPaq provides Auxiliary Supplies BagCK1 © Hands On Labs‚ Inc. 1 1 1 1 1 1 1 1 1 1 1 LabPaq CK-1 Item Description Table salt Piece of string Isopropyl (rubbing) alcohol Tap water Paper‚ 5 cm x 5 cm for weighing chemicals Beaker‚ 100 mL‚ glass Cylinder‚ 25 mL 25-mL volumetric flask
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African Diaspora and the World After reading the short story “Diaspora” by Joanne Hyppolite‚ I got a vivid understanding of how diaspora can have an effect on one’s identity. Over the past month we have studied many theories and concepts concerning race‚ gender‚ and politics. There are three theories that capture the essence of Joanne Hyppolite’s worldview as a Haitian growing up in America: intersectionality‚ identity‚ and diaspora. Individuals oftentimes experience the theory of Intersectionality
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1. What is an ionic bond? Typically an ionic bond occurs between one metal and one non-metal ion. One atom borrows one or more electrons from another atom. An ionic bond is a type of chemical bond that occurs when one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion‚ which then result in attraction. 2. What is a covalent bond? A covalent bond is a bond that occurs when atoms in a molecule share a pair of electrons. For example‚ “the
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| Gram Negative Unknown | Biology 3444-006 | | Lena Wallace | 11/7/2011 | | Abstract: The purpose of this lab was to identify an unknown bacteria culture using differential tests. The identification of the unknown culture was accomplished by identifying the bacteria based on its specific metabolic characteristics and morphology. It is suggested that culture 11 is a sample of Enterobacter aerogenes. Introduction: This experiment was centered on metabolic and biochemical testing
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concentrations of solutes in and out of the cell. Filtration is what is used to remove solid particles and they can be removed by passing through a liquid and gas. The information above is very important because it is exactly what everything in this lab will be about. It explains in detail what every single little definition and important
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Savannah Raisor Mrs. Van Orden AP Language and Composition 29 September 2014 Now We Can Begin Crystal Eastman was an American lawyer‚ antimilitarist‚ socialist‚ journalist‚ and most importantly‚ a feminist at the end of the women’s suffrage movements. Her words inspire the women of America. She breathed life into the Bill of Rights as a major leader in the suffrage and equal rights movements in the early twentieth century. Eastman displays several ideas that propel the ideology of not only the roles
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UNKNOW BACTERIA LAB REPORT UNKNOWN 36 Introduction The purpose of this lab was to identify two unknown bacteria from a mixed culture. The reason for identification of unknown bacteria was to help students recognize different bacteria through different biochemical tests and characteristics. This is important in the medical field because identification of unknown bacteria can help treat a patient by knowing the contributing source of a disease. Also knowledge of different bacteria helped others
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Bacterium #22 Purpose The purpose of this experiment was to find the identity two unknown bacteria in the given test tube. Materials •Bacterial Loop •Bunsen Burner • Petri Dish with agar •Crystal Violet •Gram’s Iodine •95% Ethanol •Safrin •Glass Slides •Microscope •Unknown bacteria in test tube Procedure On the first day‚ one plate was streaked qualitatively and left it in the 25 degrees celsius
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