gathered from the chromatograms to support their conclusions about which suspects can be excluded from suspicion based on evidence. • Understand that the separation of dye molecules in chromatography is a physical property of the dye and movement of the dye is unique for each different dye molecule. • Defend their conclusions about the dyes based on the evidence that they gathered. TIME ESTIMATE: Prep: 60 minutes (cutting paper stripes and marking the crime scene strips takes a lot of time.) Activity:
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brings together recent photographs and original images by one of today’s most famous photographers‚ William Eggleston. He has been criticized for using dye-transfer photographs‚ which is complicated and expensive in terms of prints. He only photographs every day objects that are always overlooked‚ and some people say is a waste of money to use the dye-transfer. Eggleston uses this process for making prints from his transparencies and color photographs‚ as it permits him to control the colors individually
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History of Camera “Photography” is derived from the Greek word photos meaning light‚ and graphein meaning to draw. The word was first used by the scientist Sir John F.W. Herschel in 1839. It’s a method of recording images by the action of light‚ or related radiation on a sensitive material. Alhazen (Ibn Al-Haytham)‚ a great authority on optics in the middle ages who lived around 1000 Ad‚ invented the first pinhole camera. The first casual reference to the optic laws of pinhole cameras was
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INKJET PRINTING What is inkjet? The Inkjet printer produces a digital image by dropping ink released from a nozzle onto paper‚ and are the most common consumer printers today mainly because of their reasonably low cost which caters to home and office users. It can range from consumer models to very large all-in-one units and specialty machines. History The Siphon Recorder‚ invented by Lord Kelvin (William Thomson) in 1867 was the first recording device that used drops of ink emitted from
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38 Sujet : Subject Référence : Reference EUROPEAN REGULATION – REACH Pages Pages CE9 Version : Revision Q Date: 09/12/10 Etabli par : V.NGUYEN Established by Validé par : Approved by C. De Meerschman RÉFÉRENCE NORMATIVE NORMES REFERENCE CHAMPS D’APPLICATION APPLICATION FIELD OBJECTIFS PURPOSE Regulation 1907 / 2006 of the 18th December 2006 All the products European frame for the REACH Regulation WARNING: The user is responsible for checking any
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and in ice. Controlled Variables: Planting pots‚ planting soil‚ amount of planting soil‚ water type/amount‚ blue dye/amount‚ amount of time Independent Variable: Temperature plants are placed in Dependent Variable: Xylem size in Roma Tomato plants Materials: 18 Roma Tomato plants 18 planting pots 3 bag of planting soil 25 mL beaker 1000 mL beaker Blue dye Water Ice Refrigerator Freezer Heat Lamp Thermometer Procedures: 1. Place six pairs of tomato
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lab the chelating agent used is Na2EDTA. Our Indictor Eriochrome Black T‚ is a dye‚ and will form a pink complex in the presence of a metal cation. As EDTA solution is added to the solution‚ the metal ions will complex to the EDTA solution leaving the indicator solvated. The chemical equation‚ with the known calcium ion solution‚ looks as follows: Where H2In¯ represents the solvated indicator Erichrome Black T dye. H2In¯ + Ca 2+ ⇌ CaIn¯ + 2H (blue) (pink)
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methods and textile art forms used in this culture. The production of textiles in Japan is usually made of silk‚ hemp or manufactured goods. Ikat‚ a dyeing technique used to pattern textiles that employs a resist dyeing process similar to tie-dye on either the warp or weft fibres prior to dying‚ and embroidery 2. How are the textile products used as a medium for self-expression and communication between people? Textiles products are used in Japan and a medium for self- expressions between
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was an apotheosis of the ideal woman. Women with darker hair would often find ways to lighten their hair color. They used saffron‚ alum‚ sulfur‚ as well as onion skin as dyes. These products did not often work alone. To lighten their hair‚ women would stay in the hot sun for hours. This served as a heat source to activate the dyes in their hair. Women would do this in heavy clothing with hats to protect their faces and skin from the sun. The crowns of the hats had been cut out of them‚ so the sun
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A Swiss chemist named Dr. Albert Hoffman first produced lysergic acid Diethylmide or best known as LSD in 1938 (Dye‚ 1992‚ p. 2). Hoffman discovered the drug while trying to synthesize a new drug for the treatment of headaches. He obtained the lysergic acid from the parasitic fungus that grows on rye plants known as ergot. From the lysergic acid‚ he synthesized the compound LSD. He used the compound to test for its pain killing properties on laboratory animals. Being that appeared totally ineffective
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