PPT-The Microscope and Cell Theory

The Microscope An understanding of cells and the ultrastructure of cells had to wait until objects so small could be visualized by magnification Origin of the Microscope The first record of the invention of a microscope was by Hans and Zacharias Janssen Netherlands in 1590. Microscopes are delicate and expensive instruments they should be handled with utmost care Before you use the microscope your instructor will explain its proper use Following are rule s that will protect the microscope and insure that you can make m This model comes with color corrected infinity optical system (CSIS), a movable large working distance condenser, 45 degree inclined trinocular head, high eye-point Plan eyepieces, infinity long working distance PLAN achromatic objectives and infinity long working distance PLAN phase contrast objectives. This microscope offers nine brightfield magnification powers, 40X, 60X, 100X, 150X, 200X, 300X, 400X, 600X & 900X, and six phase contrast settings, 100X, 150X, 200X, 300X, 400X & 600X. Its 30 watt adopt Kohler illumination system was designed for 90-240V wide voltage power supplies. CONCEPTS EXPLORED IN THIS LESSON. ocular lens / eyepiece. body tube. arm. base. light source/illuminato. r. revolving/rotating nosepiece. objective lenses. coarse adjustment knob. fine adjustment knob. Introduction to the Microscope. Types of . Microscopes. Calibration. Focusing. Types of Microscopes. Light Microscope - . Ocular lens on eyepiece and objective lens on turret multiply magnification.. From its humble beginnings the microscope has undergone numerous revisions since Leeuwenhoek’s day. But its usefulness has certainly not diminished. Numerous types of Microscopes are currently being used. Visit the following for a more detailed description of them. . Instrument used to make very small objects appear larger. Resolution. .  how clear an image is. . Magnification.  how much larger an object appears. Field of view .  area that you see through the lens. 1. Operating a microscope and performing a four quadrant streak manual. By: Jaclyn Flores. 2. Table of contents. Introduction……………………….…………………4. Microscope………………………….………………...5. http://biology.unm.edu/ccouncil/Biology_203/Summaries/Microscopes.htm. 1. When moving your microscope, always carry it with both hands. Grasp the arm with one hand and place the other hand under the base for support.. How to Focus on Specimen. Turn on light source on high. Turn the objective to low (4x). Lower the objective lens so that it is close but not touching the slide. Center the image by moving the stage. Adjust the diaphragm for optimum light. Light Microscope. Simple – uses a single lens. Compound – uses a set of lenses or lens systems. Simple Light Microscope. Compound Microscope. Mechanical Parts. Used to support and adjust the parts. Light Microscope. Simple – uses a single lens. . Compound – uses a set of lenses or lens systems (this is the type of microscope we use in class, it has the eyepiece lens (ocular) and the objective lens). October , 2017. Background Information. The microscope is one of the most commonly used instruments in the medical colleges, and in clinical laboratories. Students of physiology use it in the study of morphology of blood cells and in counting their numbers. . La gamme de thé MORPHEE vise toute générations recherchant le sommeil paisible tant désiré et non procuré par tout types de médicaments. Essentiellement composé de feuille de morphine, ce thé vous assurera d’un rétablissement digne d’un voyage sur . To explain the advantages of using an Electron Microscope . To be able to carry out Simple Magnification Calculations. .