Tapioca consists of starch extracted from the cassava root. Cassava was one of the main food sources of Native Americans throughout South America. It is thought that it originated south of the Amazon River in what is now Brazil. It was being cultivated by the people in this region as far back as 8000 BC. By 6000 BC‚ it was being grown in what is now Mexico and in Peru by 2000 BC. Its cultivation would spread throughout the Caribbean well before the arrival of the Europeans. Christopher Columbus
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Experiment Objective(s): The reason for this experiment is to see how starch and iodine affect each other and how a plastic bag works similar to a membrane in certain situations. Introduction: I know prior to doing this experiment that iodine mixed with starch creates a dark color and that most objects‚ organic and inorganic‚ naturally experience isotonic reactions. Hypothesis: I think that the potato will absorb more starch than the sweet potato and they will both absorb relatively similar amounts
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rate of disappearance of starch molecules from the reaction mixture. Controlled variables: volume and concentration of starch solution; volume and concentration of amylase solution same drop size of iodine solutions; same drop size of reaction mixture taken out for iodine test. Control experiment: reaction mixture without either amylase or starch (this can show that the disappearance of starch is due to the action of amylase on starch). Assumption: 1
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mechanisms to cross the membrane. Hence‚ this experiment is focused on diffusion and required to create a own model cell by pouring distilled H2O‚ starch‚ iodine and glucose in tied dialysis tubing to test for substance which diffuse through the membrane and which one could not due to its size. Materials and Methods Materials: * Distilled H2O * Starch solution * Iodine solution * Glucose solution * Test tube (3-4/group) * Test tube rack * Marking tape * Benedict’s
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to break down starch in food into smaller carbohydrate molecules and disaccharides such as maltose. It can be found in humans and some other mammals. Some plants and bacteria may also produce amylase. After being broken down into smaller carbohydrate molecules‚ it can be converted into a monosaccharide such as glucose‚ which fuels processes for organism function. There are two variations of this molecule but the human body has alpha amylase. Food that contains large amounts of starch will have a slightly
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in a certain way when a particular substance is present. We put one indicator into the each test tube containing different solutions at a time to see what organic compound is present. The color change in the indicator tells that cornstarch contains starch; honey‚ lettuce‚ and fruit juice contain sugar; corn oil contain lipid; and by comparing with the standard for positive identification of the substance‚ unknown is tested to have protein just as egg white. The result tells what nutrients are in the
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contained starch solution‚ a buffer‚ and the amylase enzyme. In results‚ the absorbance and concentration‚ decreased as they were added in the other test tubes. The highest concentration occurred at pH 8 and 9 vs. the lowest concentration occurred at pH 5‚ which had a negative concentration. For most of the pH experiments for tracking enzyme activity over time‚ concentration decreased as time increased. As the activity was going on during laboratory‚ investigation of the breakdown of the starch over time
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Benedict’s reagent to four substances‚ glucose‚ starch‚ onion juice‚ and distilled water‚ to test the detection of sugar in each. Test Sample Predicted Results Benedict’s Results 1. Glucose Change in color Color changed to a dark red 2. Starch Change in color Color changed to a dark red 3. Onion Juice Change in color Color changed to a dark red 4. Distilled Water No change No change in color The test tube with the Glucose‚ Starch‚ and onion juice were the positive controls. The
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Natural Dyes from Plants in Producing Colored Paste Abstract: Paste is a type of glue made from starch or dextrin‚ a starch product. This investigatory project shows that we can produce our own colored paste without spending much time and money and by performing simple steps. That’s why this Science Investigatory Project can help students save their money instead of spending it in buying expensive and commercialized colored glue. In addition‚ this colored paste can be an additional source of
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clean” and “Magic power”. Principal: Amalyse can catalyse the breakdown of starch into maltose. In this practical‚ solutions of the 2 washing powders will be filled into 2 identical wells on the starch agar plate separately. Starch will be broken down by the amylase disused to the star-agar. A clean zone will be formed around the wells when iodine solution is added and flushed. The higher the amylase activity‚ the more the starch will be broken down. Hence‚ a larger and clearer zone will be observed
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