composition that is known. On the other hand‚ Complex media is a complex media that is unknown and is usually not a chemically pure. 2. Classify the media used (YEB‚ NB‚ GSB and ISB) as either complex or chemically defined. (4) YEB Complex NB Complex GSB Chemically define ISB Chemically define 3. Explain why all the bacteria grow so poorly in ISB? (1) ISB is an inorganic synthetic broth in which bacteria is a heterotrophic organism that require
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Hands of Persons Unknown Book Critique At the Hands of Persons Unknown‚ a novel by Philip Dray‚ is a decisive explanation to the past multiple acts of lynching in America. In the past‚ Caucasians were seen as superior to African Americans. Lynching was one of the many acts that gave whites this superiority. The gruesome act of lynching was overlooked by the nation as a whole. People didn’t think anything of it and some seen it as entertainment. At the Hands of Persons Unknown could be seen as a
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Table of Contents Contents Page No. Task 01 1.1How Archaea is similar to Eukaryotes and how they differ from Bacteria………..02 1.2: Importance of co-ordination between sub cellular organelles in Eukaryotic cell‚ using protein synthesis and transportation within cells…….…………………04 1.3 Explain the role of different types of transporters in cell membrane……………....07 Task 02 2.1 Explain how in each stage of
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Determination of an Unknown Concentration of Potassium Manganate using Colorimetry Introduction The purpose of this experiment is to conclude the concentration of an unknown solution using colorimetry to plot a calibration curve. Colorimetry measures the absorption of light at wavelengths within the visible region of the electromagnetic spectrum. It can be used to identify the unknown concentration of a solution in reference to a solution of a known concentration. When a solution appears
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Yersinia pestis bacteria may form different types of the plague; bubonic‚ septicemic‚ and pneumonic. The bubonic plague is the most common form of yersinia pestis that attacks and infects the lymphatic system of the organisms‚ once resulting to one-third to one-half of the Europeans population wiped out in the year 1347. The lymphatic system works closely with the immune system‚ therefore the bacteria is incredibly harmful for the whole body. (http://www.ukessays.co.uk/essays/biology/bubonic-plague
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The Essay The speech ‘Funeral Service of the Unknown Australian Soldier’ by former Prime Minister Paul Keating has been chosen as the basis of this commentary. It was given on 11th of November 1993 at the Australian War Memorial in Canberra as a commemoration in honour of all of the soldiers who have served for Australia in conflict situations. Paul Keating’s point of view is evidently reflected through his speech. He aims to bring about the development of Australia as a unified nation by the instilling
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Spectrophotometric determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white‚ but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So‚ Ascorbic Acid (AA)
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1. Obtain 1 gram of an impure‚ unknown substance solid. Make sure to stir the mixture before measuring the sample; record the mixture’s code in the data section. 2. Add approx. 25-50 mL of water and several boiling chips to a 125 mL Erlenmeyer flask and heat the water to a gentle boil using a hotplate. 3. On a second hotplate‚ place a 125 mL Erlenmeyer flask containing the one gram of unknown solid along with a boiling chip. 4. Using a ring clamp‚ slowly pour approx. 5-10 mL of boiling water into
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Lab: Flame Test Purpose: to determine the ID of 2 unknown substances Background Information: Every atom consists of a nucleus with tiny electrons whizzing around it. The further away from the nucleus they are‚ the more energy the electrons have. If a metal atom is heated‚ the electrons get enough energy to jump higher away from the nucleus‚ they become “excited”. When they fall back closer to the nucleus (back to their ground state)‚ they give off this extra energy as light. Why is the
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A Report of Experiment 1 Purification and Identification of An Unknown Mixture Aim To separate a mixture of a neutral (ester‚ alcohol‚ ketone‚ aldehyde or ether) and an acidic compound (phenol or carboxylic acid) or a neutral and a basic compound (amine)‚ and to identify the unknown mixture by physical (M.P. or B.P.) and spectroscopic methods (NMR‚ IR and MS). Method The mixture (sample number: 27) was dissolved in 200 mL of CH2Cl2 and then extracted with 10% NaOH. The acid was removed
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