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View PDF - CiteSeerX

General Microbiology - Department of Biology, Howard University
General Microbiology - Department of Biology, Howard University

... The laboratory sections are designed to complement the lecture section. Students are encouraged to work independently under the supervision of the instructor. Microbiological laboratory procedures such as aseptic and diagnostic techniques are employed in the characterization of microorganisms. Since ...
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The antimicrobial resistance pattern of cultured human

... MIC of ≥100 mg/L for seven different environmental archaea and of 15 mg/L for Natronobacterium gregoryi. As this type II DNA topoisomerase is present in archaeal genomes, such high MICs are indicative of a very weak interaction between the archaeal DNA gyrase-like enzyme and fluoroquinolones.9 Moreo ...
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The effect of species diversity on metal adsorption onto bacteria

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... Yersinia enterocolitica Typically, only a small number of human cases of Yersiniosis are recognized. Symptoms are like that of appendicitis and out breaks are often detected by a sudden increase in appendectomies in a particular region. The Center for Disease Control & Prevention estimates that abou ...
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... algicides to kill, lysed or inhibit growth of cyanobacteria cells (WHO, 1999; NSW, 2000). Though the chemical substances are able to damage and kill cyanobacteria cells, they lead to the release of cyanobacteria toxins into the surrounding water, thus exacerbating the problems (Lam et al., 1995). Th ...
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FREQUENTLY ASKED QUESTIONS ABOUT MAGNETIC FIELDS

... better than wire codes. This belief is based on the fact that spot measurements involve the measurement of actual levels and so could capture exposure from sources other than power lines, such as appliances and home wiring. Wire codes could not be expected to reflect these nonpowerline field sources ...
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Human cultures and microbial ecosystems

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... viruses a rather logic decision. However, this experience would not have been possible without the help and support of certain people. In the first place, I would like to thank Prof. Dr. Ir. Mieke Uyttendaele for offering me the chance to work on the subject of viral-bacterial interactions as a mast ...
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4th Grade Homework #34 Student Name:
4th Grade Homework #34 Student Name:

... the magnet where the magnet can act to attract things is called its magnetic field. The farther away from the magnet an item is, the weaker the magnetic field is, and the less likely an object ________________ is to become attracted to the magnet. Magnets can be either permanent or temporary. A perm ...
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No Slide Title

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Insect Pathogenic Bacteria in Integrated Pest Management
Insect Pathogenic Bacteria in Integrated Pest Management

Revision_JIM-14-256
Revision_JIM-14-256

< 1 ... 18 19 20 21 22 23 24 25 26 ... 142 >

Magnetotactic bacteria

Magnetotactic bacteria (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth's magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain magnetic crystals. The biological phenomenon of microorganisms tending to move in response to the environment's magnetic characteristics is known as magnetotaxis (although this term is misleading in that every other application of the term taxis involves a stimulus-response mechanism). In contrast to the magnetoception of animals, the bacteria contain fixed magnets that force the bacteria into alignment — even dead cells align, just like a compass needle. The alignment is believed to aid these organisms in reaching regions of optimal oxygen concentration.
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