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SJB0018 Lui Min Xi
Chan Yik Tung
Au Tin Wai
Abstract
We all had persecuted by the acnes when we were in puberty. To kill the
acnes, most of the people prefer to use chemical treatments; however
these treatments may not be suitable for people with hypersensitive skin.
The water absorbent in the chemical remedies also absorbs water and oil
from the skin cells and results in dehydration of the skin. So, the potential
of some natural substances on replacing the chemical acne treat-
ment was studied in this project.
Clear Zone test was conducted to test the susceptibility of the natural substances
to acnes bacteria, Propionibacterium acnes which cause inflammation in the hair
follicles. After a series of tests, it was found that some folk prescriptions shared
among people or in the mass media were be misleading. Women are suggested
to be critical to the beauty information they found on the Internet. Propionibacterium acnes
Methodology and Results
The folk prescriptions for the acnes treatment:
Mung Bean Ground Apple Cider Vinegar Almond Oil Carrot Juice Tea Tree Oil Dandelion Cinnamon in Honey Coconut Oil
Preparation of samples
For Tea Tree Oil, Green Bean Powder, Apple Cider
Vinegar, Cinnamon Honey, Coconuts Oil:
Dissolving in
water
Disinfecting
under UV
For Almond Oil, Carrots Juice, Dandelion :
Blending Boiling
Clear Zone Test
Filter paper discs were soaked with samples and
placed on agar plates with the bacterial culture.
Diameter of the clear zone surrounding the paper
disc indicated the effectiveness of sample solu-
tions in inhibiting bacterial growth in dose-
dependent manner.
Growth of P. acnes in vacuum
Diameters of clear zones surround the paper discs soaked
with different samples
(Student’s t-test (n=3) *p < 0.05 ** p < 0.01 *** p < 0.005)
Results
Tea Tree Oil
Clear zone:
29.17 mm
Tea Tree Oil:
29.17 mm
Control:
0 mm Carrot:
28.73 mm
P. acnes were grown on a
Trypticase soy agar (TSA)
medium stored in a vacu-
um chamber at 37˚C.
Deliverables and Conclusive remarks
1. UV sensitivity test could also be another tool for study.
2. Antibacterial action of chemicals could be quantified by pour
plate method.
3. Many phytochemicals with antibacterial or medicinal effects
were usually organic and non-polar. To elucidate their potential
antibacterial effect might need detailed procedures of extrac-
tion by using various organic solvents.
Tea Tree Oil
Carrot Juice
Dandelion
Almond Oil
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