FORENSIC CHEMISTRY FORENSIC CHEMISTRY SUMMARY NOTES |Ensuring accuracy and contamination of samples for analysis – 1a and 1A |Ensuring accuracy and contamination of samples for analysis – 1a and | | |1A (continued) | |Caution must be taken by scene investigators with regard to their tools‚ |
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testing these plants molecular and structural traits to see which one is closely related to the Botana Curus ‚ using microscopes simulated electrophoresis and much more. MATERIALS: The materials we used : 1) The Lab packet 2) Foam cups 3) Chromatography paper 4) Pen or Pencil 5) Microscope slides for species x ‚y ‚z ‚and the Botana Curus 6) Microtip dropper 7) Plant extract 8) Microscope 9) H2O Procedures:
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experiment we used paper chromatography to determine the amount of chlorophyll a‚ chlorophyll b‚ xanthophyll‚ and beta-carotene in a tube of blended leaf extract. We recorded our findings on the table labeled table 1. Table 1 shows the transmittance at each wavelength on a table from 400 to 720. The information on Figure 1 came from the leaf extract on the paper chromatography that we used; with the help of acetone we saw the spectrum and the differences of the different pigments. Percentage transmittance
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Bouvier‚ Dogbo‚ and Camara studied whether it is possible to produce bixin using the microorganism E.coli. Bixin is a pigment that is only synthesized naturally by the plant Bixa Orellana (from tropical America)‚ and it is the second pigment used in the world‚ for example in cosmetic‚ food‚ and pharmaceutical industries. The authors presumed that engineering genes in sink organs of plants presenting high amounts of lycopene could be an alternative to the natural occurring Bixin‚ which would be advantageous
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Between February 27th and March 2nd my partner and I conducted an experiment about the photosynthetic rate of spinach discs. We were hypothesizing that if we place all 6 individual cups underneath a different color of light‚ the spinach discs that produce enough oxygen will have the highest amount rise‚ which will show us the optimal color of light for photosynthesis. These different colors of light included blue‚ red‚ green‚ fluorescent‚ regular light‚ and classroom light. The classroom light was
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Mixtures & Solutions Lab Report By Nathan Mitchell 4/23/15 Background Information & Research 1. Paper Chromatography is a method used for the separation of colors which are also referred to as colored chemicals/substances or pigments. This method is used for experiments‚ to identify coloring agents and to separate out a compound into its various components. 2. 3 real-world uses for paper chromatography include forensic testing‚ performance enhancing drug testing‚ and Ebola immunization. 3. References:
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The five common methods that can be used to separate various types of mixtures are filtration‚ fractional distillation‚ evaporation‚ sublimation‚ and chromatography. Evaporation is the changing of a liquid into a gas often under the influence of heat. A mixture of a solid and liquid can be separated by evaporation. Filtration is a technique that uses a porous barrier to separate a solid from a liquid. A liquid
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Chemistry mixtures and solutions Background Information and Research 1. Paper chromatography is used to break down colors using water in order to see the way the colors separate. 2. Many doctors use it to test for alcohol in people’s blood. Marine biologists use it to check for pollutants in the water. Pharmacists use it to find out how much chemical is in a product‚ and what kinds. 3. All my references came from google. Purpose The purpose of this lab is to test what colors are in
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Pigments were first extracted from tomato paste by a 50/50 mixture of acetone/hexanes; these miscible molecules act together as one organic solvent. Pigments choose the organic layer over the tomato paste with water‚ which allowed for their extraction. K2CO3 is an ionic base that was added to deprotonate the citric acid. The ionic product of the reaction in figure 3 now prefers the aqueous layer‚ which serves to wash the pigments of the acidic impurity. Saturated NaCl pulls any water into the
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experiment‚ we focused on the affect access of light has on carbon dioxide during photosynthesis. Carbon dioxide levels decrease as oxygen levels increase and glucose is produced when light dependent reactions occur. Light energy is absorbed by photo pigments and is used to raise a electron to a higher energy state. The electron is
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