Harley−Prescott: Laboratory Exercises in Microbiology‚ Fifth Edition Front Matter Preface © The McGraw−Hill Companies‚ 2002 PREFACE Take interest‚ I implore you‚ in those sacred dwellings which one designates by the expressive term: laboratories. Demand that they be multiplied‚ that they be adorned. These are the temples of the future—temples of well-being and of happiness. There it is that humanity grows greater‚ stronger‚ better. Louis Pasteur (French chemist‚ founder of microbiology
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viewed will change its size depending upon whether high- or low-power objective lenses are used. For example a cell viewed with the x40 objective will appear much larger than when viewed with the x10 objective. However because the graticule is in the eyepiece it will not change its size. Therefore the value of each of the divisions in the eyepiece graticule varies with the magnification of the objective lens. • A stage micrometer is a very accurately etched glass or plastic
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afford students a visual- kinesthetic learning approach to topics of anatomy and physiology dealt with in lecture sessions‚ thus enhancing knowledge. To prepare students for career choices in the field of health sciences. Objectives: The laboratory exercises will enable students
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August 2014 from‚http://zeiss-campus.magnet.fsu.edu/articles/basics/resolution.htmlﾧ Vocabulary.com‚ 2014. Microscopic. Retrieved‚ 20 Augusr‚ 2014 from ‚ http://www.vocabulary.com/dictionary/microscopic Microscope World‚ 2014. Parfocal Microscope Objectives. Retrieved‚ 21 August 2014 from‚ https://www.microscopeworld.com/t-parfocal_microscope_objectives.aspxﾧ
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football match and so on‚ so by that we must that gift and use it for good purposes and not bad one Objectives To Gather Information About : -Device used to overcome the limitation of sight. -Device used to overcome the limitation of hearing. Device used to overcome the limitation of sight. (Microscope) [pic] Instrument to magnify object such as virus Objective lens and eyepiece magnifying image Types: light microscope‚ electron microscope (Magnifying glass)
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enables a person to change objectives without major focusing adjustments? resolving power magnification parfocal focusing resolution Question 2 of 25 How does closing the iris diaphragm affect image brightness and contrast? decreases both increases both decreases brightness and increases contrast increases brightness and decreases contrast decreases brightness but has no effect on contrast Question 3 of 25 Which of the following objectives has the shortest working
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cabinet. There are 3 main parts of the microscope such as illuminating parts‚ magnifying parts and mechanical parts. The sub-parts in illuminating parts are electric lamp and iris diaphragm while the sub-parts of magnifying parts are eyepiece and objective lens. The mechanical parts consist of most sub-parts among these three such as barrel‚ arm‚ stage‚ coarse focus knob‚ fine focus knob and base. Figure 1 : Fully Assembled Optical Microscope
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resulting in an image that your naked eye would ordinarily see if looking at the slide. The image is then magnified by the lower (objective) lens. The objective lens flips the image and magnifies it by bending the light. The light is bent as it passes through the convex surface on either side of the lens material. The eyepiece acts as a weaker version of the objective lens by flipping the image again and magnifying it further. Compound microscopes are used most commonly
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your answer in the appropriate blank on your student answer sheet. 1. Which part of the microscope would you adjust to regulate the amount of light reaching the specimen? _________ 2. Which part of the microscope allows light to pass from the objective to the eyepiece? _______ 3. Information about which two lettered parts is needed in order to determine the total magnification of an object viewed with the microscope in the position shown? ____________ and ____________ 4.. Which lettered part should
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be left on the lens making it appear dirtier than before 4. State the name of each of the tagged parts on the microscope shown above in step 1 of the Procedures: (11 points) a. Ocular Lens b. Body Tube c. Arm d. Objective Lenses e. Stage f. Condenser g. Diaphragm h. Coarse Focusing Knob i. Illuminator j. Base k. Fine Focusing Knob 5. What type of microscope has primarily been used in this lab? (1 point) Compound
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