Benedict’s test. (6 points) a.corn syrup (1 point) b.table sugar (1 point) c.unknown 1 (1 point) d.unknown 2 (1 point) e.unknown 3 (1 point) f.unknown 4 (1 point) 3.List whether each of the following substances was positive or negative for starch‚ as indicated by using iodine. (7 points) a.onion juice (1 point) b.water (1 point) c.cornstarch (1 point) d.unknown 1 (1 point) e.unknown 2 (1 point) f.unknown 3 (1 point) g.unknown 4 (1 point) 4.The Sudan III test has been performed for
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remained on the white tile. It was opaque. Presence of reducing sugar ‚ absence of starch Solution B Benedicts test: Blue colour remained the same. Abundant amount of blue solutions remained the same and it was opaque. Iodine test: Yellowish-brown colour turned to blue-black. Moderate amount of blue-black precipitate was left on the white tile. It was opaque. Absence of reducing sugar ‚ presence of starch Table 2 : Tube Contents Temp (℃) Benedict’s Test – Colour Observation
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Principle involved | Dehydration of the carbohydrate by concentrated sulfuric acid to produce an aldehyde | Reagent | H2SO4 | Positive results | a purple-black layer/violet ring in the compound | Compound responsible | | | | Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The term carbohydrate originally referred to hydrates of carbon because the general formula of these compounds was CnH2Non or Cn(H2O)n. SAMPLES | OBSERVATIONS
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Source: file:///C:/Users/MAYEE/Documents/THESIS%201/SEAWEEDS/HOW%20TO%20%20make%20algae%20bioplastic.htm Our recent news article about algae as a source for bioplastic has received a lot of attention. But there is something very important that it didn’t tell you: You can make your own bioplastic from algae. And we will give you step-by-step instructions on how to do it. It’s a fun little science project. You can do it in your kitchen‚ with stuff you buy at the grocery store. And you can see
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TESTING FOR MACROMOLECULES Describe the positive test for starch. Explain how you know. The positive test for starch is adding iodine solution. In the experiment‚ the starch solution had the most dramatic reaction with the iodine solution. It turned to an opaque bluish-purple solution while other samples all turned to a colour related to orange and yellow other than the vegetable oil. But the vegetable oil was more translucent than completely opaque. Describe the positive test for
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of each culture Bacillus subtilis‚ Pseudomonal aeruginosa‚ and Escherichia coli‚ to each of the separate sections. The plate was incubated until the next lab period‚ where we then flooded the plate with Iodine and were able to observe and record starch Hydrolysis. (Table 1) * In order to test carbohydrate catabolism under anaerobic conditions we tested cultures of Pseudomonas aerugenosa‚ Escherichia coli‚ and Alcaligenes faecalis in tubes containing a glucose medium. After inoculating each
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Biodegradable Plastics Market Forecast and Opportunities‚ 2019 Released On 23rd July 2014 Biodegradable plastics are the type of bioplastics that can be decomposed by micro-organisms. They can be derived either from renewable polymers such as starch‚ starch blends and polylactic acid (PLA)‚ or from petroleum feedstock such as polycaprolactone (PCL) and polybutyrate. Based on the source material‚ biodegradable plastics are classified as biobased and fossil based biodegradable plastics. Among these
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testing these sugar to show or prove are they reducing sugar or non reducing sugar.Example of the test that can be done is Benedict test. 1 In plant‚glucose is stored as the polysaccharide starch.Example of food that rich in starch is oat‚cereal‚rice and corn.Starch can be divided into two groups which is that is amylose and amylopectin. Natural starches are mixtures of amylose
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The objective of this macromolecules lab was to identify the presence any of the major macromolecules in various every day food items. The three macromolecules that this lab was carried out for were carbohydrates‚ lipids‚ and proteins. There were five different experiments conducted and each of those experiments had one factor in common‚ they all had the same controls. The controls in this lab activity were already set for the lab activity. The controls were the distilled water and the baking soda
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The importance of carbohydrates in living organisms Carbohydrates contain carbon‚ hydrogen and oxygen in the ratio of 1.2.1.. There are many different types of carbohydrate‚ all of which are useful to living organisms. The most important carbohydrate is probable glucose. Glucose is a monosaccharide and is the monomer unit which makes up more complex polysaccharides. Two glucose molecules can be joined in a condensation reaction‚ whereby water is removed‚ for example to produce maltose‚ a disaccharide
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