A question on PLANT EXTRACTIONS.

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SUMMARY

The forum discussion centers on the investigatory project titled "The Antimicrobial Effect of Helianthus annuus on Escherichia Coli." The consensus is that water extracts of H. annuus are most suitable for microbial assays, as they closely resemble growth media, while alcohol or hexane extractions require careful control of solvent effects on E. coli growth. Additionally, the discussion highlights the need to analyze individual phytochemicals in H. annuus to determine their antibacterial properties against E. coli.

PREREQUISITES
  • Understanding of microbial assays and their methodologies
  • Knowledge of extraction techniques, specifically water extraction
  • Familiarity with phytochemicals and their biological effects
  • Basic principles of antimicrobial testing
NEXT STEPS
  • Research the extraction methods for H. annuus, focusing on water extraction techniques
  • Investigate the specific phytochemicals in H. annuus and their known antimicrobial properties
  • Learn about the experimental design for testing antimicrobial effects against E. coli
  • Explore the impact of different solvents on microbial growth and assay results
USEFUL FOR

Students and researchers in microbiology, particularly those conducting experiments on plant extracts and their antimicrobial effects, as well as anyone interested in the phytochemical analysis of Helianthus annuus.

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Our investigatory project for this year is entitled "The Antimicrobial Effect of Helianthus annuus on Escherichia Coli". I will be needing H. annuus extracts. I understand that there are a number of types of extracts and extraction methodologies. Which type of extract must be used for microbial assay? And which methodology should be used? A link would be very helpful ^___^. Thank you!
 
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A plant extract with water is most suitable since it is most like your growth media. If you were to extract with alcohol or hexane, for example, the effect of the solvent on the growth of E. coli would have to be controlled for.

Feel free to link to this site if you want to!:biggrin:
 
Oh I see =D. Thank you so much! ^___^

I have another related questions... umm... among our subproblems is this: "Determine the phytochemicals in H. annuus that can destroy the bacteria E. coli." I found a list of the flower's phytochemicals (http://sun.ars-grin.gov:8080/npgspub/xsql/duke/plantdisp.xsql?taxon=466) but I have no idea what to do with it o__O. How must I proceed to answer this question? Is there some sort of experimentation involved?

EDIT: Oh! Wait a bit. Am I supposed to look at the phytochemicals one by one, and then look at their uses? Hmm... What can kill E. coli?
 
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