Images carbon universe today website from the virtual

Info icon This preview shows pages 5–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Images: Carbon, Universe Today Website From the Virtual Microbiology Classroom on ScienceProfOnline.com
Image of page 5

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

View Full Document Right Arrow Icon
Three Main Types of Chemical Bonds: 1. _______ 2. _______ 3. _______ Image: Formation of ionic sodium fluoride , Wdcf; Methane Covalent Bonds , Dynablast, Wiki; DNA Chemical Structure , Madprime, Wiki From the Virtual Microbiology Classroom on ScienceProfOnline.com
Image of page 6
_______ Bonds Involves transfer of electrons between two atoms. Found mainly … inorganic compounds. Images: Sodium Chloride , University of Winnepeg Ion = an atom or group of atoms which have lost or gained one or more electrons, making them negatively or positively charged. Q: What are positively charged ions (+) called? __________ Q: What are negatively charged ions (-) called? __________ From the Virtual Microbiology Classroom on ScienceProfOnline.com
Image of page 7

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

View Full Document Right Arrow Icon
Ions: Acids & Bases An _____ is any ionic compound that releases ________ _____ (H + ) in solution. A _____ is any ionic compound that releases _______ _____ ( - OH) in solution. From the Virtual Microbiology Classroom on ScienceProfOnline.com
Image of page 8
Acidity of a solution > measured by concentration of hydrogen ions (H+). pH ranges : 0 (very _______) to 14 (very ________). Change in just one unit of scale = tenfold change in H+ concentration. If concentration of H+ = OH - … neutral. Measurements of Acidity & Alkalinity ( pH ) Images: pH scale , Edward Stevens, Wiki From the Virtual Microbiology Classroom on ScienceProfOnline.com
Image of page 9

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

View Full Document Right Arrow Icon
GRAM NEGATIVE Microaerophilic, Acidophile Helically shaped Never normal flora Robin Warran & Barry Marshall identified H. pylori in 1982, and discovered link between H. pylori and ulcers. H. pylori virulence factors: - Make proteins that inhibit acid production - Flagella propel through stomach lining to epithelial cells - Have adhesins - Make enzymes to inhibit phagocytosis What Is an Ulcer? A sore or hole in lining of the stomach or duodenum (the first part of the small intestine). Not caused by stress or eating spicy food, but these factors can make ulcers worse. Incidence: Many people have H. pylori infection, but most infected people, do not develop ulcers. Species : _________ ______ Images: Helicobacter pylori , Yutaka Tsutsumi, M.D; Histopathology of H.pylori from a gastric biopsy, KGH Multiple flagella allow H. pylori to penetrate the coating of the stomach epithelium. H. pylori from a gastric biopsy From the Virtual Microbiology Classroom on ScienceProfOnline.com H. pylori produces enzyme urease, which breaks down urea (normally secreted into the stomach) to carbon dioxide and ammonia. The ammonia is converted to ammonium that neutralizes gastric acid.. The ammonia produced is toxic to the epithelial cells and damages them. Meet the Microbe!
Image of page 10
M annitol Salt (MSA) Mannitol Salt media is both selective & differential . 1. Selective because it has a high NaCl (7.5%) concentration, and few types of bacteria can grow on this hypertonic medium. Members of genus Staphylococcus are halophilic, and grow well on this media.
Image of page 11

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

View Full Document Right Arrow Icon
Image of page 12
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