際際滷shows by User: VictoriaRoy3 / http://www.slideshare.net/images/logo.gif 際際滷shows by User: VictoriaRoy3 / Wed, 16 Mar 2016 15:48:52 GMT 際際滷Share feed for 際際滷shows by User: VictoriaRoy3 Yarrow Oral Presentation by Victoria Roy /slideshow/yarrow-oral-presentation-by-victoria-roy/59639370 asbroyfinal-160316154852
Achillea millefolium (Yarrow)has been used as a medicinal herb for thousands of years. There is historical evidence that many cultures including the Greeks, Native Americans, and Dutch have used yarrow medicinally. In the United States, there has been a recent resurgence in the use of essential oils and other homeopathic treatments. Many companies claim that some essential oils, including yarrow, have antimicrobial properties. Our study tested the antimicrobial capabilities of four commercially produced yarrow extracts against four bacterial strains. We used the Kirby Bauer Disk Susceptibility Test on two Gram negative bacteria species, Pseudomonas aeruginosa and Escherichia coli, and two Gram positive species, Bacillus cereus and Staphylococcus aureus. Distilled water was used as a control. Each species was treated with all four oils and the control with three replicates of each treatment. After 24 hour incubation, we measured the zones of inhibition and used paired t-tests to determine if the effects differed significantly among the treatments and the species. All four purchased oils showed significant growth inhibition on B. cereus. Two of the oils showed significant zones of inhibition on S. aureus and E. coli when compared with controls. P. aeruginosa, which is known for having very high antibiotic resistance,showed no measurable zones of inhibition for any of the four oils. In the future, we plan to use steam distillation to prepare yarrow extracts from local plant material and test this known oil in the manner described above.]]>
Achillea millefolium (Yarrow)has been used as a medicinal herb for thousands of years. There is historical evidence that many cultures including the Greeks, Native Americans, and Dutch have used yarrow medicinally. In the United States, there has been a recent resurgence in the use of essential oils and other homeopathic treatments. Many companies claim that some essential oils, including yarrow, have antimicrobial properties. Our study tested the antimicrobial capabilities of four commercially produced yarrow extracts against four bacterial strains. We used the Kirby Bauer Disk Susceptibility Test on two Gram negative bacteria species, Pseudomonas aeruginosa and Escherichia coli, and two Gram positive species, Bacillus cereus and Staphylococcus aureus. Distilled water was used as a control. Each species was treated with all four oils and the control with three replicates of each treatment. After 24 hour incubation, we measured the zones of inhibition and used paired t-tests to determine if the effects differed significantly among the treatments and the species. All four purchased oils showed significant growth inhibition on B. cereus. Two of the oils showed significant zones of inhibition on S. aureus and E. coli when compared with controls. P. aeruginosa, which is known for having very high antibiotic resistance,showed no measurable zones of inhibition for any of the four oils. In the future, we plan to use steam distillation to prepare yarrow extracts from local plant material and test this known oil in the manner described above.]]> Wed, 16 Mar 2016 15:48:52 GMT /slideshow/yarrow-oral-presentation-by-victoria-roy/59639370 VictoriaRoy3@slideshare.net(VictoriaRoy3) Yarrow Oral Presentation by Victoria Roy VictoriaRoy3 Achillea millefolium (Yarrow)has been used as a medicinal herb for thousands of years. There is historical evidence that many cultures including the Greeks, Native Americans, and Dutch have used yarrow medicinally. In the United States, there has been a recent resurgence in the use of essential oils and other homeopathic treatments. Many companies claim that some essential oils, including yarrow, have antimicrobial properties. Our study tested the antimicrobial capabilities of four commercially produced yarrow extracts against four bacterial strains. We used the Kirby Bauer Disk Susceptibility Test on two Gram negative bacteria species, Pseudomonas aeruginosa and Escherichia coli, and two Gram positive species, Bacillus cereus and Staphylococcus aureus. Distilled water was used as a control. Each species was treated with all four oils and the control with three replicates of each treatment. After 24 hour incubation, we measured the zones of inhibition and used paired t-tests to determine if the effects differed significantly among the treatments and the species. All four purchased oils showed significant growth inhibition on B. cereus. Two of the oils showed significant zones of inhibition on S. aureus and E. coli when compared with controls. P. aeruginosa, which is known for having very high antibiotic resistance,showed no measurable zones of inhibition for any of the four oils. In the future, we plan to use steam distillation to prepare yarrow extracts from local plant material and test this known oil in the manner described above. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/asbroyfinal-160316154852-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Achillea millefolium (Yarrow)has been used as a medicinal herb for thousands of years. There is historical evidence that many cultures including the Greeks, Native Americans, and Dutch have used yarrow medicinally. In the United States, there has been a recent resurgence in the use of essential oils and other homeopathic treatments. Many companies claim that some essential oils, including yarrow, have antimicrobial properties. Our study tested the antimicrobial capabilities of four commercially produced yarrow extracts against four bacterial strains. We used the Kirby Bauer Disk Susceptibility Test on two Gram negative bacteria species, Pseudomonas aeruginosa and Escherichia coli, and two Gram positive species, Bacillus cereus and Staphylococcus aureus. Distilled water was used as a control. Each species was treated with all four oils and the control with three replicates of each treatment. After 24 hour incubation, we measured the zones of inhibition and used paired t-tests to determine if the effects differed significantly among the treatments and the species. All four purchased oils showed significant growth inhibition on B. cereus. Two of the oils showed significant zones of inhibition on S. aureus and E. coli when compared with controls. P. aeruginosa, which is known for having very high antibiotic resistance,showed no measurable zones of inhibition for any of the four oils. In the future, we plan to use steam distillation to prepare yarrow extracts from local plant material and test this known oil in the manner described above.
Yarrow Oral Presentation by Victoria Roy from Victoria Roy
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