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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Types of Mixtures Lab Purpose • To classify types of mixtures • To determine the polarity of substances Background Information: Polarity In the middle of the night of March 24‚ 1989‚ the giant oil tanker Exxon Valdez veered out of the shipping lanes in Alaska’s Prince William Sound and struck a reef. The side of the tanker was ripped open‚ and 11 million gallons of crude oil flowed out into Alaska’s clear blue waters. Because petroleum oil is insoluble (does not dissolve) in water and less
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dimly lit garage. He could hear kids playing outside and he rubbed his hands together‚ trying to remove the sting of the bitter cold. He picked up the mirror‚ and took it into his mansion of a house in a quiet‚ peaceful suburb. It was a Midwestern winter‚ and the days were short‚ bringing cold nights whistled with the sounds of speeding cars flying down the highway. Eric heard the piercing call from his mother. "Eric‚ we’re going to McDonald’s. What do you want us to bring you back?" Eric thought
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demonstrated that the color of a given food dye depended on which light was transmitted in the visible spectrum and which light was absorbed. A quantitative measurement of the absorbance spectrum of each food dye was obtained through spectrophotometry.1 Through this method‚ we determined that the wavelength of maximum absorbance of a given food dye was directly correlated to the color of that food dye. Further‚ darker food dyes absorbed more light than lighter food dyes (Table 1). The relationship between
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Honors 10‚ Mod 4/5 May 22‚ 2013 How to Tie Dye I. Introduction A. The objective of this presentation is to teach and explain how to tie dye a shirt. B. Each student will be leaving class today with the knowledge of how to tie-dye. The attention grabbers are the colorful tie dyed shirts. II. Step-by-Step Plan A. The first step is to purchase a shirt and kit. B. The second step is to make a soda ash mixture‚ with warm water‚ that should be included
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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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CARLOS DEPARTMENT OF CHEMISTRY NAME: Maniwang‚ Ma. Aiza C. DATE: March 21‚ 2011 COURSE: BS Chemistry II APPROVED: ___________ PREPARATION OF AZO DYES ABSTRACT In this experiment‚ the azo dyes p-nitrobenzene azoresorcinol and methyl orange were prepared by the azo coupling reaction. The p-nitrobenzene azoresorcinol dye was prepared from p-nitroaniline and resorcinol. The diazonium salt formed was from the reaction of the cold solution of dissolved p-nitroaniline in hydrochloric
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-Unknown Mixtures Lab- Purpose: The aim of this experiment was to find out the two substances of the unknown mixture from salt‚ sugar‚ dirt‚ and baking soda by looking at its properties. Hypothesis: Find the unknown substance by testing it out by heating it‚ pouring water‚ vinegar‚ and observing it . Procedure: 1) Materials- * 100ml of water * Vinegar * Bunsen Burner * 2 beakers * 1 spatula 2) First‚ do steps (3-6)to find out the properties of salt‚ sugar
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Hey so this is how you say Hi. Hi! You can also say hi by saying Hello‚ Hola‚ and bye..... wait that is not right. Bye is how you say bye. You can Which of the following describes the selection of federal judges? The president nominates someone to fill a vacancy‚ and the Senate confirms the choice. The Senate nominates someone to fill a vacancy‚ and the president confirms the choice. The president nominates someone to fill a vacancy‚ and the House confirms the choice. The House
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Title Testing Kool-Aid Mix for Food Dye Additives Purpose What food dye additives go into the food products we consume and how do these additives affect our perception of that food? Hypothesis If “Black Cherry” flavored Kool-Aid Mix appears red‚ then it will contain the food dye additive Red-40 that emits a red pigment. Background Food color not only affects the appearance of food‚ it also affects our perception of how food tastes. Tests have shown that consumers will choose colored drinks over
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