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Koncentrisk hämning och stimulans av bakterietillväxt i agarkulturer
Dalarna University, School of Education and Humanities, Biology.
2005 (Swedish)Independent thesis Basic level (degree of Bachelor)Student thesis
Abstract [sv]

The aim of this study is to elucidate factors that effect growth of Sarcina lutea and Bacillus subtilis, exposed to the growth inhibitor SDS (Sodiumdodecylsulfat). Agar diffusion experiments revealed repeated, concentric zones of inhibition and stimulation upon exposure to Sodiumdodecylsulphate or to Amoxicillin. Temperature, nutrient concentration and inhibitor concentration were controlled. Formation of successively repeated zones of inhibition, stimulation, inhibition and stimulation is discussed: • The extension of the primary inhibition zone is due to the concentration of applied Sodium dodecyl sulphate. • Immediately outside the primary inhibition zone the bacteria have access to diffusing nutrients that have not been consumed in the primary inhabitation zone. • In zones of dense bacterial growth the bacteria may produce inhibiting substances, affecting growth of bacteria in adjacent zones. • In zones of dense bacterial growth the nutrients will soon become depleted, thus affecting bacteria in adjacent zones.

Place, publisher, year, edition, pages
2005.
Keyword [sv]
Allelopathy, concentric growth, inhibition zones, periodic precipitation, allelopathy bacterial, Agar diffusion, bacterial growth, Liesegang rings, Sarcina lutea, Bacillus subtilis, Escherichia coli (E. coli), Natriumdodecylsulfat, Amoxicillin
Identifiers
URN: urn:nbn:se:du-1549OAI: oai:dalea.du.se:1549DiVA: diva2:517936
Uppsok
Life Earth Science
Supervisors
Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2012-04-24Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf