Introduction The membrane of a living cell plays a vital role in regulating what goes into and out of the cell. Some characteristics of cell membranes are discovered in this exercise. Background The following information is key for the interpretation of the results of this experiment 1. Neutral red is a vital stain. It stains cells without quickly killing them. Many biological stains kill living cells. 2. Neutral red goes through an obvious color change‚ from red at about pH 6.8 to yellow
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Ink Chromatography Lab Background Information Paper chromatography is an analytical method that is used for separating and identifying mixtures of substances into their smaller parts. Paper chromatography works because the ink used contains several dyes (pigments) that when place on porous paper are dissolved in a solvent by capillary action. When the pigments (solutes) are dissolved in the solvent (water & alcohol mixture) they move through the paper at different rates depending on their
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Plant Pigment Chromatography VII. Analysis (Questions) 1. What factors are involved in the separation of pigments? Factors that are involved in the separation of pigments can include pigment solubility‚ the attraction between the pigments and paper and the size of each pigment particle. Because of these factors the results were as they were. Beta-carotene traveled the furthest because it forms no hydrogen bonds to the chromatography paper and is slightly soluble in the solvent. Contrastingly
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5.05 Ink Chromatography Basic Lab Components Background Information and Research: 1. Paper chromatography type of method that is used to separate mixtures of substances from a solution. 2. There are many uses for paper chromatography‚ especially concerning the fields of chemistry and biology. One use is to allow scientists to detect any sort of contaminants is rainwater. Another use is to identify clues at a crime scene such as blood‚ ink‚ or drugs. However‚ the more common use is to
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Experiment 5 Title : Thin Layer Chromatography Objectives: i. To distinguish polar and non-polar solvents. ii. To familiar with the analysis technique by using the thin layer chromatography. iii. To differentiate the retention factor‚ Rf for different compounds. [pic] Result: |Compound |Distance traveled by the compound | |o-nitroanaline |2.45
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Essay On The Process Of Tie And Dye Clothes are very important to people. The type of clothes on wears is sometimes used to describe that person. People have different preference to clothes of various colours. Different cultures have different methods that they use to decorate their cloths. These kinds of decorations are part of their cultural symbols. Different culture will prefer certain colours or certain kinds of decorations. Long time ago people would use tree leaves to make the colours for
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Drugs and Hair Dyes Note: the following case is copyrighted and may be copied and used only by current users and owners of the textbook‚ BUSINESS ETHICS: CONCEPTS AND CASES by Manuel Velasquez. In January 1978‚ the Food and Drug Administration (FDA) announced it was considering a regulation that would require hair dyes containing the chemical 4-MMPD (4-Methoxy-M-phenylenediamine sulfate) to carry the following label: Warning: Contains an ingredient that can penetrate your skin and has been determined
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Thin Layer Chromatography Submitted in partial fulfillment of the requirements for: CHE 324 Organic Chemistry Laboratory Dr. Robert Duncan Fall Semester 2012 Caitlin Inman‚ Team Leader October 9‚ 2012 Tyler Byrd‚ Data Collection Shared Role‚ Technique Expert Introduction: “Chromatography is used to separate components of a mixture. For example‚ imagine a mixture of wood pieces‚ pebbles‚ and large rocks to be separated and the chromatography setup as a stream. Flowing water
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TITLE Crime and Dye Lab Special Projects 1 Martin Enem LAB SECTION: BB2 INTRODUCTION Light is usually viewed as a result of the heating of a substance. The higher the temperature at which the substance is heated‚ the greater the vibrations that lead to certain light intensity given off by the molecule. It is this same theory that suggests why steel glows red hot when heated to high enough temperatures. The process of light emissions can also be induces through other means. 1 One
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think of when you think of tie dye? I know I automatically think of hippie’s in the 1960’s and 1970’s. Today‚ many of us who wear tie dye feel some connection with that peace loving hippie spirit! Ironically‚ did you know that the first tie dye was worn by Japanese warriors as early as the fifth century (www.peaceloveandtiedye.com)? Tie dye is something that has actually been around for centuries. There have been many changes in tie dye through out the centuries. Now tie dye has evolved into being part
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