for every trial. A 1% starch solution must be used in every test tube. Identical iodine solutions must be used to test the starch solution. The temperature of the warm bath water must be exactly 37 degrees C. Materials: Eyedropper Appoximately1 Liter of orange juice 25 test tubes One test subject for swishing the juice 25- 1% starch solutions (95 mL) Warm bath with water heated to 37 degrees C Iodine Stopwatch Litmus paper for pH testing Procedure: 1. Use an eye dropper to measure
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"sitting on his knee‚ in the hot enormous crowded church.” (66) Baldwin shows one of his good memories with his father. Baldwin remembers he was taken to the barbershop and he began to cry‚ his father "soothed his crying and applied the stinging iodine.” (66) Baldwin remembers as he was growing up him and his father had sweet and lovable moments with each other. In James Baldwin’s Notes of a Native Son‚ the author describes a complex troubled relationship with is father. Baldwin’s attitude towards
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randomized controlled trial study in relation to catheter-related bacteremia as the most frequent complication of the central venous catheter (CVC). The purpose of the study is to decide whether the use of 0.5% tincture of chlorhexidine or 10% povidone-iodine solution‚ is the most beneficial for preventing CVC exit site colonization‚ significant catheter tip colonization and catheter-related bacteremia in ICU patients. Protection of Human Participants Risks and Benefits Human subjects are necessary
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South Street Seaweed Report Prasenjit Saha Chem lab 106 2/6/13 Spring 2014 Prasenjit Saha‚ Abdullah Sharif I. Warmup Questions 1. Coffee beans are crushed into small pieces‚ water is added to it and the mixture is heated over a flame. What do you think would happen to the coffee bean as it interacts with the water? Explain. Essentially the warm water will run through the coffee beans and extract its properties. The flavor of the coffee beans would disperse
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Beatrice M. Period 4 22 September 2014 Material: Dark Green‚ Leafy Veggies- Spinach‚ Broccoli Light Green Veggies- Iceberg Lettuce‚ Light Green Cabbage or Brussel Sprouts Cornstarch (1 tbsp.) Iodine (5ml) Water (2000 ml) Beaker or measuring cup (500 ml) 6 Plastic jars (250 ml) 6 Stirrers Measuring spoon Pot Stove Blender Strainer 6 medicine droppers (5ml) 6 test tubes w/ rack (15 ml) A white piece of paper Pen for taking notes
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storage for more than a few days. Aim To investigate the effect of temperature of juice on the content of Vitamin C. Variables Independent: Temperature of orange juice – 25°C‚ 50°C‚ 100°C Dependent: Content of Vitamin C recorded by the number of Iodine drops Controlled: Amount of orange juice – 2mL measure using a 25mL pipette Controlled: Amount of starch solution – 2mL measure using a 25mL pipette Controlled: Amount of hydrochloric acid 1M – 2 drops from a dropper bottle Controlled: Amount
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Light-Orange Aldohexoses Glucose Light-Orange Aldohexoses Fructose Brown Ketohexoses Sucrose Brown Ketohexoses Lactose Light-Orange Aldohexoses Maltose Light-Orange Aldohexoses Starch Light-Orange Aldohexoses Glycogen Light-Orange Aldohexoses E. IODINE TEST FOR POLYSACCHARIDES Compound Color Polysaccharides (yes/no) Water Orange No Glucose Orange No Fructose Orange No Sucrose Orange No Lactose Orange No Maltose Orange No Starch Black Yes Glycogen Black Yes F. HYDROLYSIS OF DI- AND
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and develop. The thyroid gland is located in the lower part of the neck‚ below the Adam’s apple‚ wrapped around the trachea. It has the shape of a butterfly with two lobes attached to one another by a middle part called the isthmus. The thyroid uses iodine‚ a mineral found in some foods and in iodized salt‚ to make its hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). The thyroid gland also makes the hormone calcitonin‚ which is involved in calcium metabolism
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the mordant iodine in a Gram staining procedure? A. A mordant causes the crystal violet to run. B. A mordant fixes the bacteria to the slide. C. A mordant keeps dye attached to an object. D. All of the above 5. What is the order of reagents used in the Gram stain? A. crystal violet‚ iodine‚ safranin‚ alcohol B. alcohol‚ crystal violet‚ iodine‚ safranin C. iodine‚ crystal violet‚ safranin‚ alcohol D. crystal violet‚ iodine‚ alcohol‚ safranin E. crystal violet‚ safranin‚ alcohol‚ iodine 6. Following
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the reader about Amylase’s ability to withstand acidic or basic pH. To do this‚ two test tubes were both filled with 5mL of a 5% amylase solution. The first one was filled with an acid‚ while the other was filled with a base. After dropping liquid Iodine and Benedict’s solution into each one‚ the tube with a basic pH tested positive for glucose. The acidic solution tested (mostly) negative for glucose‚ although there were trace amounts at the bottom. Overall‚ my conclusion is that only acidic solutions
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