environment‚ water will leave the cell‚ as the amount of water in the cell is higher than that outside of the cell. As a cell looses water in a hypertonic environment it becomes smaller in size and withers. Isotonic environments are preferred by most microbes for the most advantageous growth‚ although some live in slightly hypotonic solutions. (Alonzo‚ 2008) Growth in NaCl Solutions Samples of S. cerevisiae and S. epidermidis were placed into sodium chloride (NaCl) solutions of 1‚ 7 and 15 percent
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Designing organisms in the industrial setting that can provide human products through genetic engineering or clean up environment waste through bioremediation is part of the sub discipline microbiology referred to as biotechnology ● A pathogen is the term used to refer to any disease causing microorganism ● The term ubiquitous is used to refer to the fact that microbes exists nearly everywhere on the earth ● A good hypothesis must be: able to be supported or rejected by experimentation ● A virion uses an infected hos
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useful in knowing its risk of toxicity to humans or animals‚ its resistance or susceptibility to antibiotics‚ and determining how to control its growth or kill it altogether. The purpose of these procedures is to discovery the identity of an unknown microbe by observing its reactions to a barrage of chemical and physical tests. Different microorganisms react in different ways‚ due to their function‚ digestibility‚ morphology‚ chemical make-up and other details. By observing the responses to these tests
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Chapter 1: The Main Themes of Microbiology What is Microbiology? • micron = small and biologia = study of living things • Microbiology = study of small living things • How small is “small”? • What do we really mean by living? • Working definition: Study of entities too small to be seen with the unaided human eye. • (< 0.2 mm = 200 µm = 200‚000 nm) Types of Microbes Prokaryotes include Bacteria and Archaea Eukaryotes include Protista (Algae and Protozoa)‚ Fungi‚ and Animalia
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4300/6938 Biomolecules Microbes in Gut Increase Fat Absorption You may think you have dinner all to yourself‚ but you’re actually sharing it with a vast community of microbes waiting within your digestive tract. A new study from a team including Carnegie’s Steve Farber and Juliana Carten reveals that some gut microbes increase the absorption of dietary fats‚ allowing the host organism to extract more calories from the same amount of food. Previous studies showed gut microbes aid in the breakdown
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Microbiology MCB 2010 Fall 2013 First Day of Classes: August 19 Last day to receive full refund: August 23 Last day to withdraw with grade of "W": October 24 Week 1 Topic Online Orientation Introduction to Microbiology (The Microbial World and You) The Unity of Living Systems (Anatomy of Eukaryotic and Prokaryotic Cells) Reading Assignments Chapter 1 Assignments to Submit Orientation Quiz Quiz 1 Quiz 2 Due Date Aug. 26 2 Chapter 4 Sept. 2 3 4 5 6 7 Chapters 5 and 6 Metabolism (Energy
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MICROBIOLOGY What is the purpose of general growth media‚ selective media‚ and differential media? Give examples of each. General Purpose Media General Purpose media is designed to grow most organisms and do not contain growth inhibitors. Standard Methods Agar and Blood Agar Bases are examples of general purpose media. Differential Media Differential media contain a component that allow an observable change when a specific chemical reaction takes place. Simmons Citrate Agar is an example
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Disposition/Food Safety: Overview of Food Microbiology July 8‚ 2011 Overview of Food Microbiology OBJECTIVES At the end of this module‚ you will be able to: 1. Explain the structural similarities and/or differences among Gram-positive and Gram-negative bacteria as well as their isolation and identification using serological‚ biochemical‚ and molecular techniques. 2. Identify the functions of the bacterial cell wall. 3. Identify the extrinsic and intrinsic parameters that affect bacterial growth
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Fundamentals and Applications. 3rd ed. USA: Benjamin/Cummings Publishing Co.‚ Inc. • Prescott‚ L.M.‚ J.P. Harley and D.A. Klein. 2005. Microbiology. 6th ed. USA: McGraw Hill Co.‚ Inc. • Rodina‚ A.G. 1972. Methods of Aquatic Microbiology. Baltimore: Univ. Park Press • Wood‚ E.J.F. 1965. Marine Microbial Ecology. London: Chapman & Hall‚ Ltd. • Zobell‚ C.E. 1946. Marine Microbiology. USA: Chronica Botanica Co.
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* Microbiology: Study of microorganisms Most microorganisms are pathogenicFalse The majority of bacteria are harmless True Total number of bacterial species: about 10 million to a billion What is a microorganism? An organism or virus too small to be seen without a microscope. (Smaller than 0.5 mm) Ex: Bacteria‚ Fungi‚ Protozoa‚ Algae‚ and Viruses Microbiom: collection of microbes Human cells vs. Microbial cells = 1:10 Which statement about Michaelangelo is not correct? A. He was
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