Experiment 9. The action of saliva on starch Study the flow chart on p. 9.02 for a few minutes to gain an idea of the outline of the experiment. (a) Prepare a water bath by using a Bunsen burner to heat some water in a beaker on a tripod and gauze till it boils; then turn the flame down to keep the water just boiling. While waiting for the water to boil‚ carry on from (b). (b) Label eight test-tubes 1 - 8 and in tube 1 collect saliva as follows: (i) Thoroughly rinse the mouth with
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Introduction: In this lab i used glucose and starch to show if the cell membrane is permeable‚ impermeable‚ or selectively permeable to these substances. Dialysis tubing is a plastic like substance that has small pores in it. These pores allow certain chemicals to flow into and out of the cells. The size of the molecule determines what goes through the tubing. On of the materials that we will be using is glucose. glucose is a simple sugar that easily dissolves in water. To test for the presence of
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Lab Report: Purpose: The Objective of this lab was to learn how to measure the pH (or acidity) of commonly known fluids‚ using the correct tools and procedures. To then use that data to document the changes noticed when mixing those same fluids and changing their respective pH levels. Materials: In order to conduct this experiment several pieces of equipment and other materials were needed. The first item was a graduated cylinder‚ which was used in order to measure out the precise
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The Effect of Concentration‚ pH and Temperature on Enzyme Activity Biology For Majors October 4‚ 2012 Abstract We examined the reaction an enzyme has when its concentration‚ pH and temperature are altered. In order to do this‚ we added different levels of pH into different test tubes with the enzyme (sucrose)‚ and substrate (sucrose)‚ and we then inverted the tube. The higher pH produced more enzyme activity. Temperature effects enzyme activity by decreasing its stability when the temperature
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Defn. of Digestion: the process whereby a biological entity processes a substance‚ in order to chemically convert the substance into nutrients. It usually involves mechanical manipulation and chemical action. Mechanical Digestion What is it? This type of digestion involves the mixing‚ grinding or crushing of large pieces of food into smaller places. Why does it take place? So that the food we consume is broken down into smaller pieces before we swallow it which in turn makes process of
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BROKEN FAMILY: ITS EFFECT IN THE ACADEMIC PERFORMANCE OF THE SELECTED COLLEGE STUDENTS OF LAGUNA STATE POLYTECHNIC UNIVERSITY A.Y. 2011-2012 A Research Paper Presented To Faculty and Staff of College of Nursing Laguna State Polytechnic University Sta. Cruz‚ Main Campus Sta. Cruz‚ LagunaBroken Family Introduction Chapter I: Introduction Family is a primary social group consisting of parents and their offspring‚ the principal function of which is provision for its members. This is any group of persons
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StudyMode - Premium and Free Essays‚ Term Papers & Book Notes Become A StudyMode.com Contributor For our free membership‚ please upload one paper to the site. Please fill out the form below to join the site. Your account will be activated immediately. 1. Personal Information Birthday: 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 January February March April May June July August September October November December
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Dialysis of starch‚ glucose and sucrose Introduction: Research question: Does the dialysis tube only allow certain substances to pass through the pores because of their size? Dependent and Independent variables: Independent variables: The temperature of the classroom The size of the molecules The size of the pores in the tube The concentration of the indicators Dependent variables: The substance will either pass the pores of the tube or not The result will vary in darkness (color) Controlled
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ATENEO DE CAGAYAN HARMFUL EFFECTS OF SOFT DRINKS ON HUMAN PHYSIOLOGY ------------------------------------------------- ------------------------------------------------- In Partial Fulfillment of the Requirements in English 27: Writing in Discipline and Business Correspondence Paolo Bacarro Araune Karol Mae Santander Hinampas BS MATH-2 XB September 17‚ 2012 INTRODUCTION This study aims to know the effects and the different ingredients found
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General Elections 2013 Essay Below is a free essay on "General Elections 2013" from Anti Essays‚ your source for free research papers‚ essays‚ and term paper examples. The Pakistani General Election of 2013 will be the next election to the 14th parliament of Pakistan. The government of Pakistan has announced elections to be held by May. In the general election‚ voting will take place in all parliamentary constituencies of Pakistan‚ to elect Members (MNAs) to seats in the National Assembly‚ the
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