The Effect of pH on the Rate of Osmosis Using a Glucose Solution Melissa Werderitch Biology 157 11/6/06 Introduction In a journal article written by Florian Lang‚ osmosis is essentially explained as the flow of water from one area to another that are separated by a selectively permeable membrane to equalize concentrations of particles in the two locations (Lang‚ 1997). Osmosis is able to maintain osmotic pressure and regulate a cell’s volume. In a hypotonic () or hypertonic () environment
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Investigation on Effects of Different pH on Enzyme Activity How does the different pH buffers affect activity of potato enzyme/extract? Introduction: Proteins are polymers that are made up of smaller units/monomers called amino acids. There are 20 different types of amino acids‚ thus make up many different combinations in types‚ numbers of amino acids as well as their orders – an explanantion for why there are so many proteins. Every protein‚ due to various reactions of amino acids to each
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The Effect of Starch on the Activity of Amylase with pH Variable Lab Report‚ Fall 2011 East Tennessee State University Department of Biological Sciences By: Shelby Brackett Date Performed: October 10‚ 2011 Lab Instructor: Joseph Kusi Biology 1111‚ Section 018 Abstract Enzymes are very important in chemical reactions. They are used to speed up the reaction taking place. They act by binding to a specific substrate and form an enzyme-substrate complex that may put stress on chemical bonds
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The Effects of Heat on the pH of the Vegetable and Their Pigment PURPOSE The purpose of this experiment is to see how pH levels of certain vegetables change while being cooked in four different mediums (frying‚ boiling‚ steaming‚ roasting)‚ and how the varying pH levels change the coloring of the vegetables. We will analyze how the different method of cooking/heating changes the levels of pH. BACKGROUND INFORMATION This experiment is based around the different pigments in vegetables‚ of which
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Summary Expectations: Example Summary (15 total points for every summary) Student Name Partner(s): None Chem 253—TA: TA Name Lab 1: Effect of pH on a Food Preservative (we’ll used this as an example) Date of Experiment Purpose (1 point) Should be a very brief statement such as: To determine the effect of pH on the food preservative Sodium Benzoate. Theory (2 points) In this section you should briefly summarize what the textbook says in regards to the history and uses of
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Callosobruchus maculatus oviposition occurred less on black-eyed beans when the legumes were covered with sunflower oil. In all trials‚ the least number of eggs were laid on the beans coated with 15 mL/kg sunflower oil‚ an intermediate number of eggs were laid on the ones coated with 5 mL/kg‚ and the most were laid on the cowpea without sunflower oil (Figure 4‚ Figure 5). No eggs were laid in quadrant C‚ which reinforces the idea that bean beetles will only lay their eggs on legumes (Table 1‚ Figure
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experiment was divided into three days to test the detoxification activity of Beetles grown on Mung and Black-eyed peas. In day 1 of part I‚ four beetles per group were chosen from each food sources for both ANAE and BNAE activity. In part I‚ the crude extract was obtained by the experimental design outlined in the lab manual (Course Supplement for Bio 101‚ p.68). Each member of the group took care of one Bean beetle crude extract. First‚ the sex was identified by the following instructions of the lab
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MEASURING pH Date of Lab: 02/09/13 Date Report submitted: 02/26/13 Purpose of the experiment By doing this experiment‚ we were trying to learn how to measure a pH with a pH meter to determine whether a solution is weakly‚ moderately or strongly acidic or basic; but also to compare the different data founded to see how the addition of certain liquid to a solution may affect the pH of the initial solution. Materials We used: * Tap water‚ distilled water‚ Soda and milk as the main
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Mr. Bean and Pantomime Body Language: Mr. Bean uses a variety of gestures and facial expressions to describe his body language. He usually uses sharp gestures and makes huge facial expressions. Mr. Bean did this when he saw the raw meat served to him at the restaurant. His mouth was wide open and his eyes bulged out of his head. He also used quick movements when he was at the beach. In this episode Mr. Bean struggled to put on his swimming trunks. While he was trying to get them on he used sharp
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A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading. The probe The pH probe measures pH as the activity of hydrogen ions surrounding a thin-walled glass bulb at its tip. The probe produces a small voltage (about 0
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