Chapter 7 - Chapter 1 Can get micro book buy e-book or buy...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1 Can get micro book, buy e-book, or buy each chapter Wwnorton.com Can go to the website and look up the book. There is  a study space. It gives question and  flashcards Tuesday, January 13, 2009 9:00 AM Microbiology - study of organisms too small to be seen with naked eye (ex: bacteria, viruses,  protozoans, fungi)    Most are not harmful (most are beneficial) They are everywhere!   Importance Medicine  Make antibiotics  Control disease Agriculture Nitrogen fixing bacteria (nodules filled with “Rhizobium”) Food Industry Beer, wine, bread, yogurt, pickles, Genetic Engineering Using bacteria to make commercial products Insulin, growth hormone, vitamins Crops resistant to pests, heat, pesticides, etc. Keeps us Alive Recycle nutrients Produce vitamins Degrade organic matter Causes Disease  HIV, colds, STD’s, flu, food poisoning   Chapter 1: Microbial Life: Origin and Discovery  What Is a Microbe? 6 major groups studied by microbiologists Prokaryotes 1. Bacteria 2. Archaea
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Eukaryotes 1. Algae (water) 2. Protozoa (water also) 3. Fungi (bread mold for example. A lot look fuzzy.) Viruses - non cellular. They do not have a membrane, or nucleus. When not  inside a host cell, they are inert.     Microbes Shape Human History Microbes affect food availability Destroy crops, but preserve food  Microbial diseases change history Black plague in Europe Smallpox in America More soldiers have died from infections than battle wounds TB, AIDS   Discovery of Microbes Light microscope invented in 1600s  Mid-1600s: Robert Hooke observes small eukaryotes 1st to use the term "cells"   Antoni van Leeuwenhoek -1676  Built simple microscopes Described  "wee animalcules" Published first drawings of bacteria (prokaryotes)   Microbes Are Living Organisms Microbes arise only from other microbes No spontaneous generation 1861: Pasteur shows that microbes do not grow in liquid until introduced from  outside Spontaneous generation -idea that living things arise from non-living matter He disproved this using broth in swan necked flasks (pasteur flasks) Sterilized broth by boiling, bent necks of flasks so that air could enter but microbes  would be caught in neck.   
Image of page 2
   led to development of methods for controlling growth of microorganisms Pasteurization – use of moderate heat to reduce the number of microorganisms.  Used in foods like milk, wine, oysters "Germ theory of disease" - they started thinking that microorganisms may also be  causing diseases
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern