History of Cell Theory mid 1600s – Anton van Leeuwenhoek Improved microscope‚ observed many living cells mid 1600s – Robert Hooke Observed many cells including cork cells 1850 – Rudolf Virchow Proposed that all cells come from existing cells Cell Theory All organisms consist of 1 or more cells. 2. Cell is the smallest unit of life. 3. All cells come from pre-existing cells. 1. Observing Cells (4.1) Light microscope Can observe living cells in true color Magnification of up
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2 1 springer.com Preface Many scientific instruments for analyzing specimen surface such as the electron microscope and the Auger electron spectrometer require clean‚ ultrahigh vacuum. The electron microscope and Auger electron spectrometer need fine electron probe‚ requiring a field emission emitter which can well work under ultrahigh vacuum. In the electron microscope and the ion microscope‚ microdischarges due to applying high voltage to electrodes sometime occur‚ resulting in deterioration
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found in a microscope. Eyepiece or ocular lens Objective lens Recall the units used to measure microscopic objects. Micrometres Recall what happens to the field of view as the magnification used increases. As the magnification increases‚ then the amount of the specimen you can see (the field of view) gets smaller. Name two different types of: Light microscope- monocular microscope and the binocular microscope. Electron microscope- transmission electron microscopes and scanning electron microscopes
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by exploring and discovering the microscopic world. At the start of his career‚ Skip Palenik went to work at the McCrone Research Institute‚ his mentor Walter McCrone’s lab‚ who was one of the only scientists who remained dedicated to the use of microscopes. During Palenik’s time at McCrone‚ he learned logical deduction based off a game in which the goal is to correctly identify the unknown substance‚ known as the U.F.O. game‚ as well as learning that every particle is a clue to its origin. Since his
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Essay Assignment II Nov. 28th‚ 2012 Discuss whether the functional Magnetic Resonance Imaging (fMRI) is a new form of “phrenology”. Is it reliable enough to be used as evidence in court? After fMRI was first introduced‚ it has been under criticism that it is not hard science. The most common technique‚ the BOLD (blood oxygen level-dependent) fMRI‚ measures the increase in regional cerebral blood flow in response to increased metabolism‚ which is to be caused from heightened activity of neuron
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The History of Forensic Science Law Enforcement has used forensic science for years to help solve puzzling crimes. But not to many people know just how long the art of forensic science has been around. For example evidence of fingerprints were found in paintings and prehistoric rock carvings made by humans. The Chinese have probably used forensics much longer than most civilizations. For example back in the 700’s they used fingerprints to find out the identity of documents and clay sculptures.
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They were then co-incubated with different nanoparticles for 4h. After removing the culture medium‚ the cells were incubated with a diluted DCFH-DA reactive oxygen species (ROS) probe for 20 minutes and observed under a microscope after washing away the staining solution. Evaluation of in vitro therapeutic effect of human tracheal epithelial cells‚ HTEpiC‚ were procured from the Cell Bank of the Chinese Academy of Sciences in Shanghai. These cells were grown in a specialized
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MICRO-RAMAN ANALYSIS OF EARLY CHRISTIAN FRESCOES IN EGYPT Hussein H. Marey Mahmoud Laboratory of Mural Paintings Conservation‚ Department of Conservation‚ Faculty of Archaeology‚ Cairo University‚ P.O. 12613 Giza‚ Egypt‚ marai79@hotmail.com ABSTRACT The early Christian cemetery in Egypt is located at Kharga Oasis in the western desert. The cemetery consists of 263 mud-brick chapels dating back to the 4th century AD. In the present study‚ micro-Raman analysis was used to study micro samples from
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INTRODUCTION TO FORENSIC SCIENCE STUDY GUIDE FROM TEXT Chapter 1 1. Define forensic science/criminalistics 2. Recall the major contributions to the development of forensic science. 3. Give examples of typical crime laboratories as they exist on the national‚ state and local levels of government in the U.S. 4. Describe the services of a typical comprehensive crime laboratory in the criminal justice system. 5. Explain the different approaches espoused by the Frye and Daubert decisions to
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between prokaryotic and eukaryotic cells? b) What is one significant similarity? A) eukaryotic cells have a neuclus‚ prokaryotic cells do not. B) Both have DNA 3. Which type of microscopy provides a 3d view of the surface of an object? A) a scanning tunneling microscope 4. Would you find proteins inside cells or cells inside proteins? (Choose one answer.) proteins in cells 5. Which typeof molecule travels through an aquaporin? Water molecules 6. Explain the basic organization (main components)
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