In order to properly performed this test‚ the initially slant for unknown microorganism #17 is important. For this lab‚ two identical slants are used for two reasons. Firstly‚ the slant can be used to make sure that there is no contamination from the Nutrient Agar plate. Secondly‚ the second slant will become a stock culture to prevent the shortage of slants during performing the series of tests. Kliger’s Iron Agar tests can be used to determine multiple characteristics of unknown microorganism #17
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contaminated the water. I thought that the detergent would stay in the soil but it ended up going through the soil into the water. Which then left the water bubbly and dark. These labs may show that we may need to look into more efficient way to filter our water. Body Paragraph # 1 – Background: One of our main resources on earth is water and everything on this earth needs water to survive. Water is found below the surface which means that the water can be easily contaminated. Many items
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Definition of ’Efficient Market Hypothesis - EMH’ An investment theory that states it is impossible to "beat the market" because stock market efficiency causes existing share prices to always incorporate and reflect all relevant information. According to the EMH‚ stocks always trade at their fair value on stock exchanges‚ making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such‚ it should be impossible to outperform the overall market through
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aquatic plants Different wavelengths of light will effect to rate of photosynthesis. I will test this by exposing the pondweed to different wavelengths of light to see how it reacts. Method I will do this by passing white light through a filter. The filter will remove all unwanted wavelengths of light leaving the plant exposed to only the desired wavelength of light. I will use three different wavelengths of light 750nm (red)‚ 650nm (green)‚ and 550nm (violet). I will keep the distance from the
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EXPERIMENT 13： Extraction: Extraction with acid and alkali Objective 1. To recover the benzoic acid and p-dichlorobenzene from its mixture from its mixture by using acid-alkali extraction. 2. To determine the percentage recovery and melting point of the recovered benzoic acid and p-dichlorobenzene. Introduction Acid-base extraction is a process which purifying the acids and bases from mixtures based on their chemical properties. Acid-base extraction is performed to isolate the compounds and natural
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was copper (II) hydroxide. The precipitate was blue because of the copper ions. In the third reaction‚ the copper (II) hydroxide solution was heated above a Bunsen burner. Continual stirring was required to reduce the “bumping”‚ or formation of bubbles that release gas very quickly that have the potential to cause injury. The balanced equation for this reaction is as follows: Cu(OH)2 (s) à CuO (s) + H2O (l) When the solution was heated‚ the bright blue precipitate
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250-mL Erlenmeyer flask. Prepare a vacuum filtration assembly using two 250-mL side-arm filter flasks‚ a 5.5-cm Buchner funnel (with a Filtervac or neoprene adapter)‚ and two lengths (each 12 in.) of vacuum tubing. [N.B. We use the second flask so between the aspirator and our filter flask so that the filtrate will not become contaminated if tap water is pulled back through the hose.] Place a piece of filter paper into the Buchner funnel so
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carbonate reacts with the acetic acid in a 1:2 ratio. Therefore‚ for every one mole of calcium carbonate that reacts‚ 2 moles of acetic acid have reacted as well. Materials: 1. Broken eggshells 2. 2 125 mL flasks 3. Stirring rod 4. 25 mL vinegar 5. Filter paper 6. Funnel 7. Electronic balance 8. Paper towels 9. Weighing paper Procedure: 1. Put 25 mL of vinegar into the flask. 2. Weigh the dry eggshells using the electronic balance and the weighing paper. 3. Pour the eggshells into the vinegar
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strips. 2. Boil approximately 2g of the specimen for 5 minutes in 5mL saline containing 1:100 (final concentration) acetic acid. Alternately soak in saline containing 0.5% phenol for 24-48 hours in a refrigerator. 3. After cooling‚ filter through filter paper until completely clear. 4. Insert a few drops of antiserum in bottom of a small test tube and carefully add some of the filtrate down the side of the tube to form a layer of antigen above antiserum. 5. Include appropriate positive
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NOISE CONTROL OF TWO STROKE PETROL ENGINE USING AQUA SILENCER SYNOPSIS Air pollution is most important from the public health point of view‚ because every individual person breathes approximately 22000 times a day‚ inhaling about 15 to 22 Kg of air daily. Polluted air causes physical ill effect decides undesirable aesthetic and physiological effects. Air pollution can be defined as addition to our atmosphere of any material‚ which will have a deterious effect on life upon our planet. The main pollutants contribute
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