Microbial Growth of Consumable Products By Bryce Wilmott AIM: To calculate the quantity of observable microbial colonies on the surface of the Agar solid‚ as to determine the presence of microbes in consumable products i.e. yoghurt and blue vein cheese. HYPOTHESIS: Microbial growth will be present in two of the three Agar plates (those containing the food product) due to the suspected presence of microbes‚ whilst the control Agar plate (containing no food products)
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Plan:- Independent Variable- Temperature is what I will be changing in the experiment. I want to find out what effect temperature has on the permeability of a cell membrane. Controlling other Variables- I will use measures to ensure that everything stays the same in my test to gain the best and most reliable results possible - Same volume of water that I put the beetroot into after heating. - The beetroot I use will be the same size each time‚ I will ensure this using a cork borer. - The beetroot
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EFFECT OF ROOM TEMPERATURE ON THE BURN-RATE OF A CANDLE BURNS Have you ever wondered whether a candle burns more quickly on a hot day‚ than on a cold day? Or is it the other way around? This science fair project was carried out to compare how quickly a candle will burn at different room temperatures. The experiment was done by measuring how much of a candle will melt in 30 minutes when placed in an environment with surrounding temperatures of 20°C‚ 25°C and 30°C. Hypothesis A candle in a colder
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Enumeration of Bacterial Contamination in Hamburger Meat from Unknown Sources C March 6‚ 2012 The importance of bacterial enumeration has become even more apparent in recent years due to the increasing numbers of harmful bacteria found in meat products. This process is the key to understanding the populations of microorganisms that contaminate the food supply. Much of the bacteria in meat has been shown to be resistant to multiple drugs; so disease-causing microbes
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Negative Screen Time Effects on Young Children Statistics show that screen time negatively affects children’s learning abilities and development. “The effects of so much screen time can include speech delays‚ aggressive behavior and obesity.” (Lavey) Since parents play a role in how much television their kids can watch‚ they can minimize the chances of their brains not developing correctly. “The first 2 years of life are considered a critical time for brain development. TV and
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The Effect of Varying Temperatures to the Rate of Respiration of Bufo marinus Statement of the problem: At which environmental temperature‚ do toads have the highest respiration rate? Most animals obtain oxygen‚ which comprise 21% of the air‚ from the environment. Oxygen combines with hemoglobin of the blood to form oxyhemoglobin. Oxyhemoglobin is transported to the tissues where oxygen is released and used for the metabolic functions of the animal. The functions produce waste materials‚ such
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a population grows rapidly‚ it can put great stress on an area such as a community or a country. When sudden extreme population growth occurs‚ food will become a prized possession‚ more people will die due to disease and war‚ and the economy will be affected. As a population grows‚ all the additional people will need food immediately to survive. There will not be time to develop new sources of food over many years. Instead‚ more and more people will need food more and more and the food will become
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Economic growth is the overall growth in an economy. Gross National Product and Gross Domestic Product are the normal measures of economic growth. Because growth can come in many ways‚ GNP and GDP are not particularly good measures. More so‚ economic growth can occur from having more people in an economy. If economic growth occurs more slowly than the population growth‚ then there can be economic growth‚ but the average person is less well-off. As economic growth is measured as the annual percent
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Eucalyptus and Colloidal Silver. Obtain two nutrient agar plates and using a permanent marker draw four quadrants on the bottom of each agar plate. Using a sterile pipet transfer 250 ml of E. coli broth to the middle of each petri dish and evenly spread bacterial culture around the agar plate. Cover and allow the culture to soak into agar for at east 15 minutes. Using sterile forceps‚ carefully place one filter disk from designated sample into the middle of each
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| 1. | | Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a(n) Your Answer: | element. | | | An element cannot be broken down into other elements. | | 2. | | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer: | match burns | | | Chemical changes‚ which release heat and light‚ occur during the combustion process. | | 3. | | Which identification is incorrect for the elements
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