Name Lab‚ Week # 3 Experiment : BACTERIAL GROWTH AND CONTROLLING BACTERIAL GROWTH Introduction <Include purpose of lab experiment> <brief summary of topic investigating and case studies > <state major finding> Procedure < Include information that the reader would need to repeat your experimental procedure. Do not include any observations or results in this section> Observations and Results Part I: Bacterial Growth Result + or - Appearance after Incubation Gram Stain N/A OF Glucose Broth
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Title: Chapter 7: Bacterial Growth Purpose: The purpose of this experiment is to observe the bacterial growth of Escherichia coli under various conditions. Physical factors and nutritional requirements determine the overall concentration of the bacteria. Along with the use of a spectrophotometer and the technique of serial dilution‚ countable colonies can be obtained. Results are plotted on a semi-log graph in order to observe the different growth curves corresponding to optical density (cell
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Modeling bacterial growth is important in maximizing the efficiencies of biological processes. Although there are many different methods of modeling bacterial growth‚ this experiment focuses on the Monod equations. However‚ in order to use the Monod equations‚ the maximum growth rate and Monod constant must be found. Here we show how the maximum growth rate and Monod constants can be obtained for Escherichia coli using M9 media in a bioreactor at 37 °C and 500 RPM. The maximum growth rate is also
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Study of Bacterial Growth and Resistance Level to Certain Antibiotics INTRODUCTION Escherichia coli—better known as E. coli—is a gram negative‚ rod shaped bacteria. It is relatively harmless‚ but can occasionally cause food poisoning. It can also provide Vitamin K2. It prevents the establishment of pathogenic bacteria‚ and is associated with or found in the intestinal organ. The antibiotic that E. coli is resistant to is Penicillin. Bacillus subtilis—better known as B. subtilis—is known as
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The Effects of Antibiotics on Bacterial Growth Biology II 1996 Bacteria are the most common and ancient microorganisms on earth. Most bacteria are microscopic‚ measuring 1 micron in length. However‚ colonies of bacteria grown in a laboratory petri dish can be seen with the unaided eye. There are many divisions and classifications of bacteria that assist in identifying them. The first two types of bacteria are archaebacteria and eubacteria. Both groups have common ancestors dating to more
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Bacterial Diversity Project John FreesackSection A24 Kim Daffer‚ John Chang September 23‚ 2012 Introduction: Bacteria are everywhere. Some can be seen with the naked eye and some require a microscope but how do we distinguish one kind of bacteria from another? To answer this question‚ we were required to complete three bacterial labs that helped us to understand what microorganisms are and how to identify and classify them. Thus‚ the main purpose of this project is to identify our unknown microorganisms
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Bacterial are very diverse and quite adaptable‚ but they still need certain factors in order to thrive. The physical requirements for bacterial growth include pH range‚ temperature‚ oxygen concentrations‚ moisture levels‚ hydrostatic pressure‚ osmotic pressure‚ and radiation levels. When considering the pH level‚ bacteria are classified as either acidophiles (acid-loving)‚ neutrophiles (neutral ph range)‚ or alkaliphiles (alkali-loving). The one that causes disease in humans would be the neutrophiles
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MICROBIOLOGY COURSEWORK The effect of antibiotic concentration on bacterial growth Introduction Null Hypothesis- Increasing the antibiotic concentration has no effect on bacterial growth. Experimental Hypothesis- Increasing the antibiotic concentration decreases bacterial growth. Scientific Theory Bacteria are prokaryotes and can be identified by their shape. Spherical bacteria are called cocci‚ rod shaped bacteria are called bacilli‚ spiral shaped bacteria are called spirilla and
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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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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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