In this lab you will test the idea that microbes are ubiquitous or present everywhere at all times. Materials One Triptic Soy Agar (TSA) plate per student One sterile swab Procedure 1. Decide on an area to test for the ubiquity of microbes. List your area on the white board in front of the classroom. 2. Obtain one TSA plate and label it on the bottom (side with the agar) with your name‚ class section and the surface you will sample. 3. Obtain one sterile swab. 4. To obtain a sample‚ roll the sterile
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utilizing procedures learnt during the semester. Procedures were followed as stated in the lab manual (1). Since the sample contained two unidentified bacteria‚ the first step was to isolate each bacterium using streak plate technique. Tryptic Soy Agar (TSA) plate‚ and differential media such as mannitol salt and Eosin methylene blue (EMB) were used for isolation streak technique. This step is imperative because the bacteria need to be separated and isolated before they can be identified. Moreover
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CHAPTER I INTRODUCTION Background of the Study Mangrove swamps are forested intertidal ecosystems that occupy sediment-rich sheltered tropical coastal environments. By trapping and stabilizing fine sediments‚ mangroves control the quality of marine coastal waters. Aside from maintaining coastal food webs and populations of animals‚ mangroves have an important role in pollution control through their absorptive capacity for organic pollutants and nutrients‚ and they play an important role in storm
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Question 1: How does Osmosis works It refers to the movement of water molecules from an area of high-level water concentration‚ that is‚ a dilute solution‚ to an area of low-level water concentration‚ that is‚ a strong solution through a semi-permeable membrane. (Passmyexams.co.uk‚ 2015) Actually‚ water moves in a bi-directional manner with the aim of leveling up the concentration. However‚ a high number of water molecules move from the fresh water towards the salty water. The outcome
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In 1947‚ experiments in which small quantities of Ca2+ ions were injected directly into the cell showed that an increase in intracellular calcium led to skeletal contractions. However it was not until the early 1960s when the way calcium ions were stored in cells became clearer thanks to work from Ebashi and Lipmann. (Burgoyne and Petersen‚ 1997). Calcium signalling determines whether or not a cell is activated. It is determined by calcium-ON and calcium-OFF mechanisms. Calcium-ON is responsible
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Investigation: How does the number of maggots in the mass affect the temperature of maggot mass and development of maggots in the mass? Abstract The aim of this investigation is to find a correlation between the number of maggots in the mass and the temperature of maggot mass. To find the correlation the different number of maggots in each mass was placed in (the isolated by glass beakers) polystyrene cups. The internal temperature of masses was obtained regularly every 10 minutes during 30
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The purpose of my science fair project is so that people know what the liquids that I added can do to an egg. My problem statement is what kind of liquid such as water‚ milk‚ or vinegar will dissolve egg shell the fastest? My hypothesis was proven correct because my Hypothesis was if I test which liquid will dissolve an egg shell faster: water‚ milk‚ or vinegar‚ then I predict that the vinegar is going to dissolve the egg shell faster. Procedures: Pour the liquid into a measuring cup to have them
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Introduction: In this lab i used glucose and starch to show if the cell membrane is permeable‚ impermeable‚ or selectively permeable to these substances. Dialysis tubing is a plastic like substance that has small pores in it. These pores allow certain chemicals to flow into and out of the cells. The size of the molecule determines what goes through the tubing. On of the materials that we will be using is glucose. glucose is a simple sugar that easily dissolves in water. To test for the presence of
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Potato Osmosis Introduction: A shipwrecked sailor is stranded on a small desert island with no fresh water to drink. They know they could last without food for up to a month‚ but if they didn’t have water to drink they will be dead within a week. Hoping to postpone the inevitable‚ their thirst drives them to drink the salty seawater. They are dead in two days. Why do you think drinking seawater killed the sailor faster than not drinking any water at all? Today we explore the cause of the sailor’s
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Title: Egg Osmosis Purpose: The purpose for doing this lab is to show how Osmosis takes place. It is supposed to show how the eggs would react to a change in their environment. The way to show how it would change would be putting eggs in different controlled environments. Each of the eggs will be put in three different environments. Vinegar‚ Karo Syrup‚ and water. Each egg will have to have a documented reaction that each will have. Introduction: The lab will allow us to see and explain each
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