If there is any update‚ it will be posted no later than this Saturday (2/8/14) Identify the following individuals’ major contributions to science Ehrlich – magic bullet Hooke –cell theory and microscope Jenner - cowpox Lister- disinfectant (phenol) Koch- kochs postulate Lancefield- immunology to classify via serotypes Linnaeus- nomenclature Pasteur- pasteurization‚ vaccine‚ microbes in nonliving matter‚ aseptic techniques‚ fermentation. van Leeuwenhoek- described live organisms with Hooke’s microscope
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The Identification of Bacillus Badius [pic] Hannah Melanchuk Dr. Robert Suran May 1 2013 Microbiology Abstract Over a three week time span I was able to successfully identify an unknown microorganism by combining the results of several tests. The first test was the Gram stain test which showed the microorganism was Gram positive and rod shaped. Using an Unknown Identification Flowchart‚ I proceeded to inoculate a Starch plate. In week 2‚ I
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1 1. Explain the principle of positive staining. (3 marks) Positive staining is done by staining the cell walls of Gram-positive bacteria with crystal violet. The cell wall of Gram-positive bacteria is made up of a thick layer of peptidoglycan which undergoes dehydration during decolourisation causing the pores to shrink. This shrinkage of pores traps CV-I complex and stain the cell purple. 2. Using a flow chart‚ outline the process of gram staining. (5 marks) Flood the slide with crystal
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1.What is the purpose of staining samples?A) To increase the contrast and visibility of the specimen B) To kill the specimen C) To see the specimen without the aid of a microscope D) To make the specimen appear larger in the microscope2.Which of the following are bacterial SHAPES? (Select all that are correct. Be sure to select the appropriate scientific name. You lose points for choosing incorrectly or for not choosing a correct choice.)A) Vibrio B) Strepto C) Spirillum D) Staphylo E) Cocci
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slide before staining? Differentiate between a differential stain and a special stain (how are they different‚ don’t simply identify the types of differential stains and special stains). What is the role of the Gram’s iodine in a Gram stain? What color would all bacteria become at the end of the staining procedure if the iodine in the gram step was omitted? What is the role of the alcohol wash in the Gram Stain? What color would all bacteria become at the end of the staining procedure
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Cross Hall‚ which is touched by hundreds of students entering the building every day. The most important exercises performed include gram staining‚ which
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pathogenic bacteria. Bacillus subtilis‚ known also as the hay bacillus or grass bacillus‚ is a Gram-positive‚ catalase-positive bacterium (1). A member of the genus Bacillus‚ B. subtilis is rod-shaped‚ and has the ability to form a tough‚ protective endospore‚ allowing the organism to tolerate extreme environmental conditions (2). Although this species is commonly found in soil‚ more evidence suggests that B. subtilis is a normal gut commensal in humans. As a model organism B. subtilis is commonly used
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Exercise 3.9 Endospore Stain (Differential Stain) Eula Lewis Bio 2921 February 27‚ 2013 Zere Ezaz‚ Ph. D. Objective: 1. To learn to endospore stain 1. To distinguish endospores‚ free spore‚ and vegetative cells Theory: A dormant form of bacterium that allows it to survive poor environmental conditions are called endospores. Their tough outer covering is made of keratin and is also the reason they are resistant to heat and chemicals. The strength of keratin also makes it resist
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University of Phoenix Material Name:Shaniece Daniels Appendix A – Cell Division in Bacteria After reading Ch. 6 in Microbiology: Principles and Explorations‚ fill in the following matrix. List the four phases of bacterial growth and briefly describe what happens in each phase. Lag phase: Is the period when the bacteria are adjusting to the environment. Log phase: Is when the population grows in a logarithmic fashion. Stationary phase: a substance that shows different
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lab an analyzed under a microscope. There are three suspect bacteria‚ which are Bacillus‚ Mycoplasma‚ and Escherichia. A discussion of staining procedures‚ as well as anatomical differences will be discussed for each specimen. Bacillus are Prokaryotic cells‚ that are rod shaped bacteria and can from long chains. Bacillus are also spore forming. When gram staining a Bacillus sample‚ they are found to be gram positive. However‚ there are some Bacillus that are gram negative. Escherichia are similar
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