1 CHAPTER I INTRODUCTION Moringga oleifera, also known as “Malunggay”, is known worldwide especially in the Asian countries that cures specific bacterial infection. It is a plant that is mainly used in cooking and many other Philippine dishes but malunggay has other purposes aside from being an ingredient in cooking, it is also used to kill certain bacteria species. It is said that it contains antibacterial components and is also used to treat open wounds by extracting its leaves to help aid in blood clot. There is also another plant that is commonly found in the country which is the Zingiber officinale, also known as “Ginger”, is a pungent aromatic rhizome which is commonly used as an additive flavor for cooking; as tribal ornaments for religious or superstitious beliefs; and also used as a
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1
CHAPTER I
INTRODUCTION
Moringga oleifera, also known as “Malunggay”, is known worldwide especially
in the Asian countries that cures specific bacterial infection. It is a plant that is mainly
used in cooking and many other Philippine dishes but malunggay has other purposes
aside from being an ingredient in cooking, it is also used to kill certain bacteria species. It
is said that it contains antibacterial components and is also used to treat open wounds by
extracting its leaves to help aid in blood clot. There is also another plant that is
commonly found in the country which is the Zingiber officinale, also known as “Ginger”,
is a pungent aromatic rhizome which is commonly used as an additive flavor for cooking;
as tribal ornaments for religious or superstitious beliefs; and also used as a medicinal
plant and is also known to have antibacterial components. One bacterium which is
commonly known to be found almost anywhere in the surroundings is the Staphylococcus
aureus. This bacterium is found mainly on the nose and on the skin of humans, and in
this manner about 20% of the human population are long term carriers of Staphylococcus
aureus. In other words, this bacterium is the most common and abundant in the society.
This bacteria specie can cause a range of illness from minor skin infections such as
pimples, impetigo and boils. Though the treatment of choice for Staphylococcus aureus is
penicillin, other biologists seek out more practical and natural alternatives.
2
The research study aims to compare the antibacterial effects of Malunggay
(Moringa oleifera) leaf and Ginger root (Zingiber officinale) extracts on the growth of
Staphylococcus aureus bacteria. The purpose of this study is to know whether which
extract is more effective in inhibiting the growth of bacteria specifically Staphylococcus
aureus, and also we may be able to know whether which extract will be much
recommended for antibacterial purposes.
We, the researchers of this study chose Malunggay leaf and Ginger root extract
because both of them are commonly known to be natural antibacterial and they are found
to be abundant in the country; we also chose Staphylococcus aureus bacteria because it is
known to be the most common bacteria that can be found in the environment especially
the human skin. This study was based on previous researches that tests whether or not
Malunggay leaf and Ginger root extracts have antibacterial effects and the result of these
studies have shown positive results of antibacterial effectiveness. So this study focuses on
comparing the antibacterial effects of both extracts.
This study is significant because it focuses about environmental and health related
issues. The study benefits the society in terms of preventing sickness and diseases, and
helps maintain proper hygiene and sanitation in the society. This study is also a good
source of medical interests because it focuses on natural antibacterial alternatives rather
than the artificially prepared commercial products which are highly sold competitively in
the market. In this study, it gives nature a sense of importance not just maintaining the
balance of the eco-system but also to help individuals live in a better and much healthy
lifestyle.
3
Review of Related Literature
Malunggay (Moringa Oleifera)
Malunggay (Moringa Oleifera) is a popular plant known for nutritional value as
well as a herbal medicine. Malunggay is a plant that grows in the tropical climates such
as the Philippines, India and Africa. It is widely used as vegetable ingredient in cooking,
as herbal medicine for a number of illness and other practical uses.
Malunggay (Moringa Oleifera) has been used as herbal medicine in many
cultures for hundreds of years; Malunggay is known as a very nutritious plant where it is
used to combat malnutrition in third world countries especially for infants and nursing
mothers.
Malunggay as anti-infectious: Antibacterial; Anti Fungal. In late 1940's, the
Department of Biochemistry at the Indian Institute of Science in Bangalore (PLN Rao)
have found that Moringa Oleifera leaves contain a compound "pterygospermin" that is
known in medical science as having antimicrobial, antibacterial, anti fungal properties.
According to Jimenez, M. Q. (April 2011) in the Comparative Study on the
Effectiveness of Pulverized Citrus Seed, Sodis and Malunggay seed against coliform
organisms as method of water disinfectant and its acceptability among selected
Households in Barangay concepcion, Kabasalan Zamboanga Sibugay; malunggay had a
positive effect of disinfecting water from coliform organisms.
According to Bidaure, C. (2009) in his studies the Effect of Water Disinfection
Promotion on the utilization of Boiling, Solar Disinfection and Malunggay Seed Powder
as methods of water disinfection in Barangay Pangi, Ipil Zamboanga Sibugay; malunggay
had been confirmed to be a good disinfectant.
According to Wood, C.D. (1988) in his studies the comparison of Efficacy of
Ginger with Various Antimicrobial Sickness Drugs; ginger has been proven to have
antimicrobial properties.
According to Chan, E.W.C. (2008) in his studies the Antioxidant and Tyrosinase
Inhibition Properties of Leaves and Rhizomes of Ginger specie; ginger has been
confirmed to be a good antimicrobial.
According to Panelo, C. I., Doctor of Medicine, “Potency is influenced by
concentration, highly potent substances can produce large response even at small
concentrations and vice versa.”
7
Theoretical and Conceptual Framework
The concept of the research is a comparative study where the process is based
upon comparison of two independent variables with its effect to the dependent variable.
The independent variables, which are the Malunggay leaf and Ginger root extract, are the
ones to be tested whether or not it will affect the growth of Staphylococcus aureus.
INPUT PROCESS OUTPUT
Fig. 1 Diagram of Theoretical and Conceptual Framework
INDEPENDENT VARIABLES
Malunggay leaf extract
Ginger root extract
EXTRACTION
CONTROL
H2O Solution (Distilled Water)
DEPENDENT VARIABLE
Zones of Inhibition in culture of Staphylococcus aureus
8
Statement of the Problem
The main purpose of the study is to compare the antibacterial effects of
Malunggay leaf (Moringga oleifera) and Ginger root (Zingiber officinale) extract on the
growth of Staphylococcus aureus. More specifically the study aims to answer to
following problem:
1. If both extracts (Malunggay leaf and Ginger root) are effective on inhibiting the
growth of Staphylococcus aureus.
2. Which between the two extracts (Malunggay leaf and Ginger root) is more
effective in inhibiting the growth of Staphylococcus aureus.
Hypotheses
The hypotheses for this study are:
H1 Both extracts (Malunggay leaf and Ginger root) are effective in inhibiting the
growth of Staphylococcus aureus.
H2 There is significant difference between both extracts’ (Malunggay leaf and Ginger
root) effectiveness in inhibiting the growth of Staphylococcus aureus.
Scope and Limitation of the Study
The scope of our study is limited only in comparing the antibacterial effects of
Malunggay leaf (Moringa oleifera) and Ginger root (Zingiber officinale) extract on the
growth of Staphylococcus aureus. It was conducted only in one of the laboratories inside
the school’s vicinity. Further findings beyond the scope will not be subjected in the
assessment.
9
CHAPTER II
METHOD
This research study was conducted in order to determine the antibacterial effects
of Malunggay leaf and Ginger root extract on the growth of Staphylococcus aureus. The
advantages and disadvantages as well as the reliability of the research instruments and
materials used are also part of the objectives. In order to answer these research goals, we,
the researchers, conducted this experiment in line with this topic. Specifically, there are
two extracts prepared, the Malunggay leaf and Ginger root extract, each prepared with
ten different concentrations each having three trials with punched filter discs in order to
determine accurately which variant is more recommended to be used. Distilled water
solution served as the control of the experiment for reference of the two prepared
extracts. Bacteria culture of Staphylococcus aureus were then obtained after the extracts
were prepared. The punched filter paper discs were soaked in each of the extracts
prepared and was added in each Petri dish of cultured Staphylococcus aureus and was
then incubated to at least 36 degrees Celsius (body temperature) inside an incubator for
24 hours. After that, cultured Staphylococcus aureus in agar mediums placed into Petri
dishes with the added extracts were then observed and measured for appearances of zones
of inhibition using a Vernier caliper. Then, observed data were gathered from this
10
research experiment and then computed for interpretation and analysis using Weighted
Mean and T-test method.
Research Design
The experimental method of research was used for this study. To define the
experimental type of research, it is a study of cause and effect. It differs from non-
experimental methods in that it involves the deliberate manipulation of one variable,
while trying to keep all other variables constant. The experimental method is usually
taken to be the most scientific of all methods, also called as the 'method of choice'. The
main problem with all the non-experimental methods is lack of control over the situation.
The experimental method is a means of trying to overcome this problem.
Setting
The experiment took place in one of the Science Laboratory rooms of PG or ST
buildings in San Pedro College Davao City, wherein the research instruments and
materials used for the experiment are already complete and provided by the school itself.
Research Instruments
Petri dish - a transparent glass or plastic plate with cover used to contain the
culture of various microorganisms.
Vernier caliper - a measuring device with a vernier scale used for measuring very
fine measurements.
11
Pipette - a slender tube attached to or incorporating a bulb, for transferring or
measuring out small quantities of liquid, especially in a laboratory.
Beaker - a lipped cylindrical glass container for laboratory use; used for stirring,
mixing, heating, weighing liquid solutions or chemicals.
Erlen Meyer Flask - is a widely used type of laboratory flask which features a flat
bottom, a conical body, and a cylindrical neck.
Test tube - a thin glass tube closed at one end, used to hold small amounts of
material for laboratory testing or experiments.
Test tube rack – a rack used for putting the test tubes.
Graduated cylinder - a thick-walled glass tube used for measuring out volumes of
liquid.
Punched Filter paper discs - a semi-permeable paper barrier placed perpendicular
to a liquid or air flow. It is used to separate fine solids from liquids or air.
Forceps - an instrument with two movable arms that are joined at one end, used
for picking up and holding things.
Alcohol lamp - a lamp filled with alcohol that is used for heating, burning and
sterilizing.
Inoculating loop - a short metal stick with a small loop at the tip of its end used
for streaking bacterial culture.
Mortar and Pestle - is a tool used to crush, grind, and mix solid substances. The
pestle is a heavy bat-shaped object, the end of which is used for crushing and grinding.
The mortar is a bowl, typically made of hard wood, ceramic or stone.
12
Blender - an electronic instrument used for blending, mixing, liquefying and
extract preparation of organic or inorganic substances.
Hot Plate - is a portable self-contained tabletop small appliance that features one,
two or more gas burners or electric heating elements.
Sieve Cloth - it is a clean piece of cloth used for sieving small and large solid
particles to obtain pure liquid solution widely used in extraction process.
Dropper - a small tube instrument with a rubber squeeze tip used for transferring
small amounts of liquid solution from one container to another.
Incubator – a machine that incubates different biological organisms.
Research Procedure
First, we prepared the two extracts, the Malunggay leaf and Ginger root extracts.
In order to obtain accurate and reliable results, the two extracts were prepared with ten
different concentrations each having three trials designated with 3 punched filtered paper
discs in each Petri dish with their prepared culture medium. The water-based extraction
was the method used in the process. We then prepared the culture of Staphylococcus
aureus bacteria by asking from the laboratory stock room of the school if they have a
source where we could get the bacteria. After Staphylococcus aureus bacteria was
requested and identified, we made a preparation of the culture obtaining pure
Staphylococcus aureus each gently streaked to the culture mediums in the Petri dishes. A
water solution was included to serve as the control of the experiment for reference of the
two extracts’ antibacterial effects. Punched filter paper discs were then used for soaking
in each of the extracts prepared. The punched filter paper discs obtaining the extracts
13
were then placed in each of the Petri dish of cultured Staphylococcus aureus and then
incubated to at least 36 degrees Celsius (body temperature) inside an incubator for at least
24 hours. After 24 hours of growth and inhibition, cultured Staphylococcus aureus in
Petri dish with the added extracts were observed and measured for appearances of zones
of inhibition using a Vernier caliper for accurate and precise measurements. Then,
observed data were then gathered from this research experiment and were then computed
for interpretations and analysis using Weighted Mean and T-Test statistical tool.
Research Statistical Tool
The research statistical tools used for this study are Weighted Mean and T-Test.
The weighted mean was used to get the total average of the data gathered while the T-
Test was used for comparison of the two independent variables.
Weighted Mean - is the central tendency of a collection of numbers taken as the sum of
the numbers divided by the size of the collection. This was used to get the total average
measurements of the zones of inhibitions.
T-Test - is any statistical hypothesis test in which it assesses whether the means of two
groups are statistically different from each other. This was used to compare the extracts’
antibacterial effects to the growth of Staphylococcus aureus.
14
CHAPTER III
RESULTS
Table 1
Antibacterial Effects of Malunggay Leaf (Moringa oleifera) extracts on the Growth of Staphylococcus aureusExtracts Measurements of Zones of Inhibitions (mm)
In this table, after incubating the culture media for 24 hours, the researchers found
out that Malunggay leaf extract with 10% concentration provided the highest zone of
inhibition compared to the other 9 concentrations. Random results in terms of their levels
of concentration are expected as the researchers used water-based extracts in the
experiment.
15
Table 2
Antibacterial Effects of Ginger (Zingiber officinale) Root extracts on the Growth of Staphylococcus aureusExtracts Measurements of Zones of Inhibitions (mm)
This data presents the results of the antibacterial effects of water, the control of
the experiment. It shows an almost uniform measurement in all the zones of inhibition in
the concentration of 100%. It is already expected to obtain the said results because they
all have the same concentration. And even though the results were not highly effective in
inhibiting the growth of the bacteria culture, it is significant for basis of the two extracts’
antibacterial effects whether they are better with or without water mixture.
Table 4
Comparison of Antibacterial Effects between Malunggay leaf (Moringa olifera) and Ginger root (Zingiber officinale) extracts using T-testComparison p-value Interpretation
Malunggay and Ginger 0.004 Malunggay has higher significant value
In this table, it presents the overall difference between the two extracts’ total
average. The t-test statistical method was used to determine if there is significant
difference between them and it presents that there is a 0.004 significant difference
because a value is greater than 0.05 shows no significant difference.
17
CHAPTER IV
DISCUSSION
This study is focused on the Antibacterial effects of Malunggay leaf (Moringa
oleifera) and Ginger root (Zingiber officinale) extract on the growth of Staphylococcus
aureus. The impact of this study is dependent on the rise and innovation for future usage
of natural antibacterial treatment specifically for Staphylococcus aureus, the pimple-
causing bacteria, wherein 20% of human population is long term carriers of this
bacterium. Many scientists tried to come up with the safest and most natural way to kill
the bacterium and many have achieved in doing this. On the other hand, we, the
researchers of this study came up with an idea of comparing two of the most common and
natural antibacterial found in the country.
One of the most abundant herbs found in the country is the Malunggay leaf
(Moringa oleifera) plant which has long been known to have antibacterial properties and
also the Ginger root; they both have natural antibacterial properties. In this study, we
performed an experiment to compare which extract is more effective in inhibiting the
growth of the bacteria prepared in designated cultured mediums; the presence of zones of
inhibition determine the effectiveness of the extract’s antibacterial properties to
Staphylococcus aureus. Both extracts were given 3 trials prepared with 10 different
concentrations. The extracts were then tested and both obtained positive results. These
18
results show that the Malunggay leaf extract provides better results and larger zones of
inhibition compared to that of the ginger root extract because the Malunggay leaf extract
achieved the maximum measurement of 12.17mm zone of inhibition at 10%
concentration whereas the Ginger root extract at its highest only had 9.82mm zone of
inhibition at 80% concentration. Though the total average of the Malunggay leaf and
Ginger root extract provide random results, it was already expected beforehand as we, the
researchers used the water-based extraction process which is easier, cheaper and more
natural compared to other complex extraction methods. Still, this kind of extraction
process was still preferable in the study as the study only focuses on comparing the two
extracts’ antibacterial effectiveness, not its individual concentration behavior.
And to determine if the results are significantly different, the T-test statistical
method was then used and the results showed that there is significant difference of 0.004
which is lesser than 0.05, because a result higher than 0.05 shows no significant
difference. This implies that Malunggay leaf extract is highly preferable because it is a
more effective antibacterial than the Ginger root extract.
19
CHAPTER V
SUMMARY, CONCLUSION AND RECOMMENDATION
Summary
In this study, the antibacterial effects of Malunggay (Moringa oleifera) leaf and Ginger
root (Zingiber officinale) extract on the growth of Staphylococcus aureus showed
significant difference in their results. The study determined the potency of the plant
extracts on Staphylococcus aureus, which is the common acne causing bacteria. Nutrient
mediums were used for bacterial culture and test. 10 Different concentrations of the
Malunggay leaf and Ginger root extracts were prepared in liquid form and further
filtered. Distilled water was used as the control in the experiment for basis of the two
extracts. Discs containing the plant’s extracts were inoculated on the bacterial culture and
incubated for 24 hours at 37 degrees Celsius. Data gathered after the experiment was
analyzed and interpreted using Weighted Mean and T-Test method. Malunggay extract
with 10% concentration showed the optimum result on inhibiting the growth of
Staphylococcus aureus with 12.17mm zone of inhibition whereas; Ginger extract in its
80% concentration had a zone of inhibition of 9.82mm. Based on the table and statistical
data presented, Malunggay and Ginger have a 0.004 value less than 0.05 which shows
that there is a significant difference between the two extracts. This data gathered indicates
20
that Malunggay is more effective in inhibiting the growth of Staphylococcus aureus than
the Ginger.
Conclusion
Based on the results data gathered, the researchers arrived to the following conclusions:
1. Both Malunggay leaf extract and Ginger root extract show positive result on
inhibiting the growth of Staphylococcus aureus on a specified medium.
2. Based on the results obtained on table 2 the list of concentrations and its zone of
inhibitions, Malunggay leaf extract with 10% concentration showed optimum
results on inhibiting the growth of Staphylococcus aureus with an average of
12.17 compared to Ginger roots extract’s strongest inhibiting concentration of
80% with an average of 9.82.
3. Malunggay leaf extract is more effective compared to Ginger root extract in
inhibiting the growth of staphylococcus aureus.
Recommendation
To the future researchers, we would like to recommend further study on the
behavior of Malunggay and Ginger on the growth of Staphylococcus aureus. We would
also like to recommend the use of Ethanol in the process of extraction because it is more
likely to produce pure extracts of different concentrations. We would also recommend
21
conducting purification of crude extracts on the extraction of Malunggay and Ginger to
obtain pure extracts.
22
REFERENCES
Bidaure, C. (2009). The Effect of Water Disinfection Promotion on the utilization of Boiling, Solar Disinfection and Malunggay Seed Powder as methods of Water Disinfection in Barangay Pangi, Ipil Zamboanga Sibugay.
Chan, E.W.C. (2008). The Antioxidant and Tyrosinase Inhibition Properties of Leaves and Rhizomes of Ginger specie.
Ernst, E., Pittler, M.H. (2000). Efficacy of ginger for nausea and vomiting: a systematic review of randomized clinical trials. B J Anaesth. 84(3), 367-371. Retrieved October 4, 2011 from http://www.medicalhealthguide.com/articles/ginger.htm
Freeman-Cook, L., Freeman-Cook, K.D. (2005). Staphylococcus aureus Infections. HealthHype.com. Retrieved October 4, 2011 from http://www.healthhype.com/staphylococcus-aureus.html
Gonlachanvit, S., Chen, Y.H., Hasler, W.L., et al. (2003). Ginger reduces hyperglycemia-evoked gastric dysrhythmias in healthy humans: possible role of endogenous prostaglandins. J Pharmacol Exp Ther. 307(3), 1098-1103. Retrieved October 4, 2011 from http://www.medicalhealthguide.com/articles/ginger.htm
Jimenez, M. Q. (2011). The Comparative Study on the Effectiveness of Pulverized Citrus Seed, Sodis and Malunggay seed against coliform organisms as method of water disinfectant and its acceptability among selected Households in Barangay concepcion, Kabasalan Zamboanga Sibugay.
Kumar, N.A., Pari, L. (2003). Antioxidant action of Malunggay, Moringa oleifera Lam. (drumstick) against antitubercular drugs induced lipid peroxidation in rats. MedicalHealthGuide.com. Retrieved October 4, 2011 from http://www.medicalhealthguide.com/articles/malunggay.htm
Shukla, S., Mathur, R., Prakash, A.O. (1988). Biochemical and physiological alterations in female reproductive organs of cyclic rats treated with aqueous extract of (Malunggay) Moringa oleifera L. MedicalHealthGuide.com. Retrieved October 4, 2011 from http://www.medicalhealthguide.com/articles/malunggay.htm
Sripramote, M., Lekhyananda, N. (2003). A randomized comparison of ginger and vitamin B6 in the treatment of nausea and vomiting of pregnancy. J Med Assoc Thai. 86(9), 846-853. Retrieved October 4, 2011 from http://www.medicalhealthguide.com/articles/ginger.htm
23
Wood, C.D. (1988). The Comparison of Efficacy of Ginger with Various Antimicrobial Sickness Drugs.
24
APPENDIX A
LETTER OF PERMISSION
December 7, 2011
Engr. Leonora C. GustiloDirector of LaboratoriesSan Pedro College
Dear Ma’am,
We the students of Biology Department are conducting a research entitled “A Comparative Study on the Antibacterial Effects of Malunggay Leaf (Moringa oleifera) and Ginger Root (Zingiber officinale) extract on the Growth of Staphylococcus aureus”..For us to be able to get the data needed for our thesis, we are planning to conduct the research procedure in any of the available laboratories of this institution. We are aiming to conduct our experiment for the duration of the whole semester starting December 10, 2011 onwards.
With this, we are asking for your permission to allow us to use the laboratory room and equipments.These are the following laboratory apparatus needed for the research procedure.