DNA Packaging: Nucleosomes and Chromatin By: Anthony T. Annunziato‚ Ph.D. (Biology Department‚ Boston College) © 2008 Nature Education Citation: Annunziato‚ A. (2008) DNA packaging: Nucleosomes and chromatin. Nature Education 1(1) Each of us has enough DNA to reach from here to the sun and back‚ more than 300 times. How is all of that DNA packaged so tightly into chromosomes and squeezed into a tiny nucleus? The haploid human genome contains approximately 3 billion base pairs of DNA packaged
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Microbial Diversity and Ubiquity Microorganisms are microscopic organisms that are so small that that they can only be visualized by the aid of a compound-brightfield microscope. While we generally cannot see individual microorganisms with the naked eye‚ they are present in virtually every habitat known to man. Microorganisms can be prokaryotic—the bacteria or eukaryotic—the algae‚ protozoa or fungi. While viruses are acellular they are also studied in the scope of microbiology because
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The tissue samples were visualized using a Leica microscope (Leica Microsystems‚ Wetzlar‚ Germany)‚ and the Leica image manager software to enhance and photograph the sections. All sections were photographed and epidermal thickness was measured 50 places per section and the average epidermal thickness was calculated pr section (Fig. S5). The measurements were made on sections photographed at 10X enhancement. All sections were blinded to the observer during measurements. Strengths: Good method
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Observing Cells Objectives: After completing this exercise and reading the corresponding material in your text‚ you should be able to 1. Prepare a wet mount slide 2. Identify structures described in this lab on slides 3. Cite examples of the wide diversity of cell types 4. Relate differences in structure among cells to functional differences Introduction Structurally and functionally‚ all living things share one common feature: all living organisms are composed of cells
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Nanotechnology‚ Springer‚ Germany‚ 2004‚ * p * 1460 S. Kassavetis et al. / Materials Science and Engineering C 27 (2007) 1456–1460 * Piner‚ R * Carpick‚ R. W.; Salmeron‚ M. Scratching the Surface: Fundamental Investigations of Tribology with Atomic Force Microscopy. Chem. Rev. 1997‚ 97‚ 1163. * Bishop‚ A.; Nuzzo‚ R. G. Self-assembled Monolayers: Recent Developments and Applications. Curr. Opin. Colloid Interface Sci. 1996‚ 1‚ 127. * Kumar‚ A.; Abbott‚ N. L.; Kim.‚ E.; Biebuyck‚ H. A.; Whitesides‚ G. M. Patterned
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Congratulations AKASH for bagging an “Overall L-SAT Rank” of 1.Your Patiala ZONE Rank is 4. Join Lakshya before 15th December 2013 and get additional 5% Founder’s Week Discount along with Early Bird‚ L-SAT Scholarship and other eligible discounts. Limited Seats !!! Registrations are Open: Thanks to all the parents and students for overwhelming response for L-SAT. Lakshya catered around 35‚000 students in L-SAT. We have Limited Seats. We will try our best to enrol all deserving students but
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Experiment 1- Title: Observing Bacteria and Blood Purpose: The purpose of this experiment is to learn how to use a compound microscope and an oil immersion lens while observing prepared bacterial slides. Additionally‚ it will be necessary to prepare slides so as to observe bacterial cultures from yogurt as well as to observe the composition of blood (i.e. red blood cells‚ white blood cells‚ and platelets). Procedure: Exercise 1: Viewing Prepared Slides To begin this lab experiment I
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INTRODUCTION a) Background of the Study Ever since man utilized various species of plants for food‚ clothing‚ as medicines‚ fibers and other useful things. In fact‚ the interaction of man and the plants led to the establishment of the so-called traditional knowledge. One should look into the potential impact of the plant which are generally rich sources of many natural products‚ and its ecological environment and the manner on how it could be utilized for significant use for human welfare
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solely to be a teaching tool. (Washington‚ 2013) Laboratory Timetable and Outline Lab # Date Lab Title Page 1 Sept. 9-13 Introductions‚ Laboratory Orientation‚ Microscopy 2 Sept. 16 -20 Enzymes 3 Sept. 23 - 27 Cell Structure 4 Sept. 30- Oct. 4 Cell Division 5 Oct.7-11 Tissue Classification 6 Oct. 14- 18 Integumentary System 7 Oct. 22- 24 Journal Article
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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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