at a certain point. Materials: · 4 x test tubes · 5mL Diastase · 5mL Water · 10mL 2% Starch Suspension. · Pipette · 2 x Spotting tiles · Large Beaker filled with water of assigned temperature · Thermometer · Iodine · Marker Method: ======= 1. The test tubes were collected and labelled W‚ S‚ A and B. 2. To the tube labelled W‚ 5mL of water were added and to S‚ the Diastase. In tubes A and B‚ 5mL each of 2% Starch Suspension was added
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Lim‚ Jean Rya Que 2013 – 72199 ATQ 1 – Qualitative Analysis of Carbohydrates Data Sheet: A. Osazone Formation Crystals Formed? (hot) Crystals Formed? (Cold) 5% sucrose Yes (orange) Yes (yellow) 5% glucose Yes (orange) Yes (yellow) 5% fructose Yes (brown) Yes (brown) 5% maltose Yes (orange) Yes (gold) B. Molisch Test Color of Junction Glucose Purple Sucrose Purple Starch Purple C. Bial’s Test Color Change Ribose Yellow -> Dirty Green Glucose Yellow -> Dark Yellow D. Seliwanoff’s Test Observation
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Experiment 8 Unique # 51070 The main purpose of the experiment involves two oxidation-reduction reactions to calculate the oxidizing capacity of a sample of unknown bleach. In order to determine the volume of Na2S2O3 added‚ students will conduct a titration of bleach with thiosulfate with addition of a starch indicator to find the end point of the titration. Moreover‚ the oxidizing capacity of bleach is calculated with the percentage by mass of NaOCl in the unknown bleach sample. The overall
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A1. Procedure The preoperative procedure of using with chlorhexidine-alcohol (CHG) before surgery has been proven to be more effective to reduce the number of surgical site infections (SSI) than the use of povidone iodine. By reducing the number of infections post surgery‚ it can lower patient morbidity and can reduce hospital stay time and eliminate further unnecessary costs. A2a. Basis for Practice (who determined ) The basis for changing the method of using chlorhexidine-alcohol bath
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cost-efficient‚ yet most under-utilized‚ staining method used to identify bacteria. It consists of a basic dye (the primary stain crystal violet)‚ a mordant (Gram ’s iodine)‚ decolorizer (acetone:alcohol) and a counter stain (safranin). A mordant is a compound which helps hold the primary stain to the bacteria. In this case‚ the iodine forms a complex with the crystal violet to "lock it into" the cell wall/membrane. The decolorizer is used to decolorize the bacteria that "do not like" the primary stain
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Chapter 8 Water/Minerals Sunday‚ March 24‚ 2013 6:05 PM Minerals- naturally occurring‚ inorganic‚ homogeneous substances; chemical elements. Major minerals- essential mineral nutrients required in the adult diet in amounts greater than 100 milligrams per day. Also called macrominerals. Trace minerals- essential mineral nutrients required in the adult diet in amounts less than 100 milligrams per day. Also called microminerals. Water-The brain is composed of approximately 80% water
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ABSTRACT Enzymes are highly specific and can distinguish isomers of the same molecule. The enzyme invertase specifically catalyzes the reaction of the conversion of sucrose to its individual carbohydrates glucose and fructose. It does not catalyse the reaction of maltose to 2 glucose or lactose to galactose. In this experiment‚ titrimetric and spectrophotometric methods were used to determine the specificity of invertase by determining the amount of glucose converted from the given disaccharides
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change occur in the jar water? Because IKI was added to give it an amber color (gold color). It iodine solution and this caused the color change. 4. What does the color change in #3 indicate? Water and IKI was in jar and the iodine caused the color change of the water. 5. Why did a color change occur in the dialysis tubing bag? In the bag there was water‚ sugar (glucose) and starch. When IKI (iodine) comes into contact with the starch the contents in the bag turned blue. This IKI was able to
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take advantage of the fact that different types of molecules have different functional groups and‚ therefor‚ different chemical properties. Thus‚ they will react to test reagents (also called indicators) differently. Materials: Biuret‚ Sudan III‚ Iodine‚ Benedict‚ water‚ hot plate‚ paper towels‚ pipette‚ ruler‚ goggles‚ and a timer. Method: Benedict’s test for reducing sugar: 1. Ruler was used to mark 1 cm and 2 cm marks on each tubes. 2. Negative control tube was filled with 1cm of water. Positive
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and you add Bieuret reagent into each‚ then the gelatin will change color. Hypothesis F1: If you add Benedict’s solution to the urine sample and boil it‚ then it will change color‚ indicating that glucose is present. Hypothesis F2: If you add iodine to the urine sample‚ then it will turn color‚ stating that there is a starch present. Hypothesis F3: If you add Biuret’s solution to the patient’s urine sample‚ then it will change color‚ meaning a protein‚ or child‚ is present. Hypothesis F4: If
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