scientific theory that describes the properties of cells‚ which are the basic unit of structure in all organisms and also the basic unit of reproduction. The initial development of the theory‚ during the mid-17th century‚ was made possible by advances in microscopy; the study of cells is called cell biology. Cell theory is one of the foundations of biology.The observations of Hooke‚ Leeuwenhoek‚ Schleiden‚ Schwann‚ Virchow‚ and others led to the development of the cell theory. The cell theory is a widely accepted
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characters of Actinomycetes 2.5 General characters of Algae 2.6 General characteristics of Mycoplasma and Rickettssia. 2.7 General characteristics of Archaebacteria 2.8 Introduction to Gnotobiology/ axenic life/ space microbiology. Credit – 3 : 3.1 Microscopy 3.1 Properties of light i) ii) iii) iv) v) Definitions : Magnification‚ resolving power‚ depth of focus‚ focal length‚ numerical aperture. Objectives Low ‚ high & oil immersion. Oculars : function‚ Huygenian‚ Ramsden‚ Hyperplane & compensating.
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Aganon‚ Glaiza S. Ibanez (14 August 2014) (21 August 2014) I. Introduction Microscopes and the field of Science are two inseparable things. Almost all Sciences are associated with the use of a microscope‚ a device use to view objects which are not visible to the naked eye. The term microscope came from the Greek term “Mikros” which means “small” and “Skopien” which means “to examine” (Vocabulary.com‚ 2014). Today‚ microscopes are of great importance especially on the field of Biological Science. One
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study of chemicals a routine part of forensics. He is recognized as one of the first people to use a microscope to assess blood and semen stains to help solve crimes. Two major contributions made by Hans Gross were; 1)‚ he wrote the first article describing the application of scientific disciplines to the field of criminal investigation. 2)‚ he described how the fields of chemistry‚ microscopy‚ physics‚ and fingerprinting could assist in criminal investigations (Kriminol‚ 2007). Dr. Karl Landsteiner
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human immunodeficiency virus c) Microbial ecologist -- studies bacteria that degrade oil d) Microbial physiologist – studies fermentation of sourdough bread e) Molecular biologist – studies recombinant DNA 2) You are observing a cell through a microscope and note that it has not apparent nucleus. You conclude that it most likely a) has a peptidoglycan cell wall b) has a cellulose cell wall c) moves by pseudopods d) is part of a
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A Full Laboratory Report on: The Detailed Microstucture of Primary Materials This report presents a study on the microstructure of 8 material samples using the proper optical microscopy techniques. Emphasis is given in sample preparation‚ the right use of transmitting and reflecting optical microscopy methods‚ and a detailed analysis of the distinct microstructure of metal‚ ceramic‚ and polymer materials. For metals and ceramics‚ preparation procedures include grinding‚ polishing‚ and surface
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from the statues and alabaster monuments in Luxor and Karnak temples. These samples were studied by Polarizing microscope‚ Thin sections were prepared from the studied samples‚ then Petrographical examination and photography was carried out under the polarizing
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on a compound microscope‚ what is the likely total magnification? 2) What type of lens does a microscope use to produce a magnified image? How does a lens produce a magnified image? 3) What are some ways to increase contrast in microscopy? 4) Define: simple stain‚ differential stain and special stain. 5) What are the steps in a gram stain? 6) How can staining aid in the diagnosis of TB? 7) In general‚ can viruses be imaged with a light microscope? 8) Are
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The CELL THEORY‚ or cell doctrine‚ states that all organisms are composed of similar units of organization‚ called cells. The concept was formally articulated in 1839 by Schleiden & Schwann and has remained as the foundation of modern biology. The idea predates other great paradigms of biology including Darwin’s theory of evolution (1859)‚ Mendel’s laws of inheritance (1865)‚ and the establishment of comparative biochemistry (1940). Ultrastructural research and modern molecular biology have
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invented by Angelo Barovier • 1540 – Vannoccio Biringuccio publishes first systematic book on metallurgy • 1556 – Georg Agricola’s influential book on metallurgy • 1590 – Glass lenses are developed in the Netherlands and used for the first time in microscopes and telescopes 18th century • 1738 – Metallic zinc processed by distillation from calamine and charcoal patented by William Champion • 1740 – Crucible steel technique developed by Benjamin Huntsman • 1779 – Hydraulic cement (stucco) patented
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