brick-red precipitate. | Sucrose | Reducing Sugar | As Benedict’s Test | Iodine Solution | Starch | A Blue-Black Colouration | Sudan III | Lipids | A Red-Stained Oil Layer separates on the surface of the water‚ which remains uncoloured | Biuret Solution | Proteins | Mauve or Purple Colour Slowly Develops | ‘ Table 2 . Biochemical Tests On Common Foodstuffs Sample | Proteins | Lipids | Starch | Sugars | Egg white | Turns Purple / +ve | Turns pale orange / -ve | Turn yellow/-ve |
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World Academy of Science‚ Engineering and Technology 72 2010 Preparation and Some Mechanical Properties of Composite Materials Made from Sawdust‚ Cassava Starch and Natural Rubber Latex Apusraporn Prompunjai*‚ Waranyou Sridach The performance and stability of sawdust-reinforced composite materials depends on the development of coherent interfacial bonding between sawdust and matrix. The general components of sawdust are cellulose‚ hemicellulose‚ lignin‚ pectin‚ waxes‚ and water-soluble substances
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Lab Report #1 Introduction A cell’s plasma membrane is known to be selectively permeable. This implies that the membrane is selective on what substances can pass in and out of the cell. There are two methods of transport that occur through the plasma membrane. One method of transport is called active process which uses ATP energy to transport substances through the membrane. The other method is called passive process which does not require the use of ATP energy. During passive processes
Free Diffusion Molecular diffusion Solution
transport them down the concentration gradient. Hypothesis Activity One: Simple Diffusion- Simulating Dialysis Simple diffusion will occur between different concentrations until equilibrium is reached. Activity Two: Simulating Facilitated Diffusion Facilitated diffusion will occur between different concentrations. Material and Methods * Two beakers * Membrane holder * Four Dialysis membranes: 20 (MWCO)‚ 50 (MWCO)‚ 100 (MWCO)‚ 200 (MWCO). * Membrane barrier * Four solutes: NaCl
Free Molecular diffusion Diffusion Osmosis
HOW DOES DISEASE AFFECT THE LEVEL OF ORGANIZATION? * THE KIDNEY There are two kidneys‚ each about the size of a fist‚ located on either side of the spine at the lowest level of the rib cage. Each kidney contains up to a million functioning units called nephrons. A nephron consists of a filtering unit of tiny blood vessels called a glomerulus attached to a tubule. When blood enters the glomerulus‚ it is filtered and the remaining fluid then passes along the tubule. In the tubule‚ chemicals and
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tested for the presence and localization of starch. One leaf was a light-grown plant with mask‚ and the other was a dark-grown plant with mask. Both leaves were soaked in iodine solution and then rinsed in order to observe the pattern of staining. According to the result‚ the light-grown leaf’s masked areas had no blue-black coloration and the unmasked area turned blue-black in color. The blue-black coloration of the leaf indicated the presence of starch. The light-grown leaf’s unmasked areas turned
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as the optimal temperature needed for the enzyme to correlate with the bacteria and fungi. The enzyme’s break down within the starch was observed through different temperatures and time periods. The Starch was placed in both the fungal and bacterial amylase where they were then placed on spot plates. Through the iodine test‚ it was concluded whether the breakdown of starch occurred or not. The experiment
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groups. A chemical test that is sensitive to these groups can be used to identify molecules that are in that class. This lab is broken down into four different sections‚ the Benedict’s test for reducing sugars‚ the iodine test for the presence of starch‚ the Sudan III test for fatty acids‚ and the Biuret test for amino groups present in proteins. The last part of this lab takes an unknown substance and by the four tests‚ determine what the substance is. BENEDICT’S TEST Introduction: Monosaccharides
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drops of each amylase and mix it with iodine to observe the presence of starch at each temperature. We conducted this experiment for both bacterial and fungal amylase. Results were reached based on the color of the iodine and amylase mixture. Colors were classified from 1-5‚ 1 being a light yellow and 5 being a dark brown. A light-yellow color means starch is not present in the solution‚ the lighter the color the less starch. This means that the temperature
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Alpha amylase is an enzyme that aids in the breakdown of starch and glycogen to form glucose and maltose through the hydrolyses of alpha linked polysaccharides1. Starch is a complex carbon and is the main energy storage material found in plants and some bacteria. It is a major component of food as it supplies plants with energy and carbon. Starch consists of two types of polysaccharides called amylose and amylopectin1.The properties of starch can depend on the number of alpha 1‚4 glycosidic bonds and
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