Identification of Proteus vulgaris from an Unknown Sample Lakhram Bhisham March 31‚ 2016 01:447:390 General Microbiology TA: Jennifer Goff ABSTRACT This report delineates how unknown #405 was identified as Proteus vulgaris out of a possible seven species of Enterobacteriaceae by applying various tests that are able to distinguish between members of the family. Inevitably‚ the results for many tests are identical across multiple species‚ which is expected due to the organisms’ evolutionary relatedness
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What happens when you take two natural wondering parallel lines and force them to turn whilst still parallel? In a two dimensional perspective you will see two overlapping waves with a positive and negative parabola opposite from one another. In reality we would see a spiral. Imagine that these lines are instead two of the smallest forms of energy known as a photon and they are spiraling each other. When you reach distances of four hundred nanometres to seven hundred nanometres in between the photons
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Phenols and polyphenols are compounds found naturally in plants. A group of natural phenols called the flavonoids are of popular interest because researchers have found them to have the potential to contribute to better health.[1][2][3][4][5] Tea has one of the highest contents of flavonoids among common food and beverage products.[6] Catechins are the largest type of flavonoids in growing tea leaves.[7] Contents [hide] * 1 Catechins * 2 Theaflavins * 3 Tannins * 4 Metabolism * 5 See
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are produced and the medium can change colors. If you let these sugar tests go for more than a day‚ you risk the possibility that the color will have changed and you may misread the test result. C. What is the purpose of adding phenol red to the fermentation tubes? Phenol red is added as a pH indicator. It will turn yellow below pH 6.8 and a darker-pinkish red above pH 7.4. D. What is the reason that bacteria have differences in the carbohydrates that they can ferment? The ability or inability of
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changes in different drying methods is that the lowest percentage of essential oils is associated with a temperature of 60°C in the hot air‚ infrared and ultrasound methods‚ and while the highest essential oil content is related to the ultrasound method at 40°C. Therefore‚ according to the results of the research‚ using the high temperatures in the hot air‚ infrared and ultrasound dryers gives rise to reducing the yields of essential oils of the valuable medicinal plant. These results are in line with
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Title: - Infrared Spectroscopy‚ Boiling point and Melting point. Introduction: - Infrared spectroscopy has also made a break though in medicine. It used to evaluate the kidney stone diseases thus broadening the use of IR in different ways. The purpose of this lab experiment is to identify the unknown solutions using the Infrared Spectroscopy (IR)‚ boiling point‚ and melting point (1). The IR helps to determine the compounds such as a functional group. In order to analyze the compound‚ IR and melting
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flask‚ dilute to the mark with distilled water and then ensure that the contents of the flask are well mixed by repeated shakings. c. Titrate 25 cm3 portions of the diluted reaction mixture with the standard 0.050 M sulphuric acid provided‚ using phenol red indicator until two or three consistent results are obtained. d. Calculate the weight of acetylsalicylic acid in each tablet and compare your results with the manufacturer’s specification. Compare your results with those given in different
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Introduction Esters are in a lot of natural products like flowers‚ spices and fruits. They are usually used in artificial flavorings. Carboxylic esters help amplify the sensory effect of esters. Isopentyl acetate is made from the direct esterification of acetic acid and isopentyl alcohol. The direct esterification of acetic acid and isopentyl alcohol is an equilibrium reaction that shifts the product to the side by using the excess of one of the starting reagents. Acetic acid usually used in excess
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to analysis the purity of aspirin. When FeCl3 was placed into the crude aspirin the solution turned yellow with spots of purple. This indicated that impurities (phenols) were present in the crude aspirin. When we tested the pure aspirin the solution turned yellow. This indicated that our aspirin was pure and did not contain any phenol groups. Since aspirin is an acid‚ 5% aqueous sodium bicarbonate was used
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alkaline by-products are produced and the medium can changes colors. If you let these sugar tests go for more than a day‚ you risk the possibility that the color will have changed and you may misread the test result. C. Why is phenol red added to the fermentation tubes? Phenol red is added as a pH indicator. It will turn yellow below pH 6.8 and a darker-pinkish red above pH 7.4 D. Why do bacteria have differences in the carbohydrates they can ferment? The ability of inability of a particular species
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