death rate of the bacteria; Death Phase- All the nutrients have been consumed and the waste is turning toxic‚ the bacteria begin to die. By observing these phases‚ scientists are able to construct a graph that illustrates these phases‚ called a bacterial growth curve. Scientists are
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Diarrhea vs. Thrush You know that feeling where you need to use the toilet so bad and you rush to the bathroom and don’t know if you’re going to make it? That feeling is diarrhea. Diarrhea describes loose‚ watery feces. It is a common condition that isn’t usually serious. It lasts about two to three days in most cases and can be treated with over the counter medication. The most common cause of diarrhea is stomach or intestinal flu. If the digestive tract recognizes a substance ingested to be
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Optimal Growth Conditions and Generation Time for E. coli Introduction The goals of these exercises were to determine the optimal growing condition and the generation time of E. coli. Materials and Methods Please refer to the lab manual for a complete list of materials. To determine the optimal growth condition for E. coli‚ we had to test the environmental factors that could affect the growth. We tested the relative growth of E. coli in the presence and in the absence of oxygen. The results
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At the beginning of the semester‚ samples of bacteria were obtained from various sources. Two bacterial colonies were isolated from plates that were incubated in the lab and these bacteria became the basis for this project. The bacterial cultures were maintained and used for various physiological‚ cultural‚ and biochemical tests and observations over several weeks. The purpose of culturing bacteria over half the course of the semester was to learn various techniques used in microbiology labs and
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Bacterial Diseases of Fish by Robert B. Moeller Jr.‚ DVM California Animal Health and Food Safety Laboratory System University of California Aeromonas hydrophila (Bacterial Hemorrhagic Septicemia) 1. Gram negative motile rods 2. Effects many freshwater species and usually is associated with stress and overcrowding. 3. The clinical signs and lesions are variable. The most common finding is hemorrhage in skin‚ fins‚ oral cavity and muscles with superficial ulceration of the
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process in which a bacterial cell takes up extracellular DNA. This can be especially useful for bacteria in order to acquire certain traits such as: antibiotic resistance‚ synthesis of catabolites‚ or any other trait that would help improve its survival. However‚ not all bacterial cells are naturally competent (able to naturally take up extracellular DNA). There are several techniques that can make cells artificially competent‚ some of which will be discussed later. Bacterial transformation was
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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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diseasesRESPIRATORY DISEASES CONOR BREMNER TYPES OF RESPIRATORY DISEASES * Severe Acute Respiratory Syndrome * Tuberculosis * Scarlet Fever * Q Fever * Pneumonic Plague * Pertussis * Paragonimiasis * Mucormycosis * Lassa Fever * Legionaires’disease Severe Acute Respiratory Syndrome (SARS Virus) Causes The SARS Virus is airborne and can be propelled 90 cm‚ it can also be deposited on surfaces. It was first reported in Southern China in November 2002
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Table of Contents 1.0 Abstract 2 2.0 Introduction 2 3.0 Aims 3 4.0 Theory 3 5.0 Apparatus 5 6.0 Procedure 5 7.0 Result 7 8.0 Calculation 10 9.0 Discussion 11 10.0 Conclusion 13 11.0 Recommendation 13 12.0 References 13 13.0 Appendix 14 1.0 Abstract In this experiment‚ Escherichia coli is used as a sample to study the growth kinetic of microorganism in shake flask. A different volume of E.coli was transferred into 250ml Erlenmeyer/shake flask containing media for the
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2. Why Choose Microalgae culture or Microalgae as an Ideal biomass? Or Microalgae: advantages and disadvantages The microalgae culture have the infinite potential to be used as primary producers of biomass in coming years‚ eventually they will turn out to be as most significant energy source. They can act as feedstock for several types of renewable fuels such as ethanol‚ methanol‚ biodiesel‚ methane and hydrogen. Table 1 represents certain feedstocks used for biofuel production (Chisti 2007; Dominguez-Faus
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