the growth of oral bacteria. Each procedure consisted of three trials for each test subject. For procedure #1‚ saliva was collected from each test subject and then mixed in tubes containing melted nutrient agar. Each tube was labeled with the test subject#s initials and trial number. The agar
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Your Full Name: Lauren Sinay UMUC Biology 102/103 Lab 1: Introduction to Science INSTRUCTIONS: On your own and without assistance‚ complete this Lab 1 Answer Sheet electronically and submit it via the Assignments Folder by the date listed in the Course Schedule (under Syllabus). To conduct your laboratory exercises‚ use the Laboratory Manual located under Course Content. Read the introduction and the directions for each exercise/experiment carefully before completing the exercises/experiments
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grew in many different ways. There were many different results in every bacteria that was examined‚ no bacteria looked alike towards one another. The bacteria in order to be produced it need to be put nutrient agar that would nourish it. The bacteria were inoculated into the nutrient agar so it can grow to be observed to view the results. Introduction Bacteria have been always around but us humans can’t see it with naked eye. Bacteria can be both harmful and good depending what type of bacteria
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Project Title: Examination of bacterial content of sea water samples from selected sites in South East England Introduction Over the past few years coastal beaches across the UK has seen lavished with recognition for their cleanliness‚ by sections of the media and various organisarions. Majority of these beaches have been awarded the Blue flag award in recognition for meeting set criteria on various standard including cleanliness‚ water quality‚ environmental management and environmental education
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and West Asia received outside influences and effectively spread their religions. Economically‚ they interacted with other regions to enhance their societies. Thus‚ the social‚ cultural and economic aspects helped give rise to interaction and diffusion of the civilizations. Both societies emphasized male-dominance‚ but they were structured differently. Women in both regions had little power and were seen as subordinates. The strict patriarchy demonstrates the strength and control of the civilization
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Osmosis and diffusion are two ways that cells reach this equilibrium‚ without exerting energy. Due to the unique nature of the phospholipid bilayer‚ small molecules can pass through the semipermeable membrane easily‚ through diffusion (https://www.biologycorner.com). Water‚ however‚ has a slightly more difficult time diffusing‚ and diffuses in a different way‚ called osmosis. Osmosis involves aquaporins‚ specialized proteins in the phospholipid bilayer‚ to facilitate the diffusion of water across
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COLLECTION AND PROCESSING CONCLUSION AND EVALUATION RELATIONSHIP BETWEEN SURFACE AREA AND THE VOLUME OF A CELL‚ HOW IT AFFECTS THE RATE OF DIFFUSION Nazirul Ibrahim 04.10.2011 DATA COLLECTION AND PROCESSING We have determined the following variables: * dV- the time for the color indicator phenolphthalein to reach the center of the cube (diffusion) * iV- the size of the cube * cV- the amount of Sodium Hydroxide the perfect dimensions of the cube‚ how the cube is fully submerged
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Petri dish- This is used to transfer the agar cubes as you should put the cubes in there as some of the chemicals can be dangerous Safety goggles- These are essential to keep your eyes protected from harmful chemicals White tile- To help to see the colour change Stop clock- To time how long it takes for the cube to change colour. Method 1-Stop the clock and quickly but carefully place one of the agar cubes into the specimen tube containing 3.7g/100cm3 of hydrochloric acid
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Biology 107 Section 1 11/4/13 Diffusion & Osmosis Introduction The purpose in this experiment was to estimate the osmolarity of potato tuber and celery cells by change of weight.Pieces of potato tuber and celery would be incubated in different sucrose solutions to find out the molarity at which weight of potato and celery tissues do not change. My hypothesis was that the Table 1: Group Data for Experiment:Estimating Osmolarity by Change in Weight Table
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Agar What is it and where is it from? Derived from the cell walls of red algae‚ agar is a gelatinous substance extracted through a process of boiling and filtration. Agar is specifically used in laboratories for diagnostics and experimental purposes. Agars main purpose is to act as a growth medium for micro-organisms such as bacteria and fungi. The micro-organisms feed off the nutrients contained in Agar and can be both cultured and observed within it by scientists and the use of a microscope. Using
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