Then compare the amount of bacterial growth...

Projects bacteria is easy and fun! Use this simple procedure as the basis for their own experiments

or science fair projects. Ideas for

other projects that are listed at the end. Bacteria are single-celled or unicellular

, << microorganisms. They >> are different from cells of plants and animals because they have no

different membrane body core, containing genetic material. Instead, their DNA

floats in a ball inside the cell. Individual bacteria can only >> << viewed under a microscope, but they multiply so quickly that they often form

colonies, we can see. Bacteria reproduce when one cell divides into two cells

process called dual division. Distribution is fast strattera without prescritpion just 20 minutes. Under ideal conditions one bacterium can grow into more

one billion bacteria in just 10 hours! (It is good that the natural conditions rarely

perfect, or land will be buried in the bacteria!)

Growth of bacteria and testing fun any time or project

great science fair projects. Bacteria are everywhere and as they multiply faster they easily

research with a few simple materials. All you need more, and agar

or. Agar is a gelatinous >> << Wednesday, which provides nutrients and a stable, controlled environment for the growth of bacteria >>. << Most bacteria will grow and use, but other

fastidious bacteria (with more complex needs for nutrients like

Bacillus stearothermophilus,

Branhamella catarrhal and

coagulans Bacillus ) prefer. You also need a source of bacteria and it is not hard to find! You can

mouth swab or skin of animals, soil, or household surfaces such as sinks

or toilet. If you want to explore some type of bacteria can also

purchase. Adult supervision is recommended when working with bacteria. Growth of bacteria is a safe activity if you hold

cover and always wash hands after contact with utensils. Preparation of culture dishes before you grow bacteria, you need to prepare a cup of sterile culture. 125 ml bottle of nutrient agar containing enough to fill about

10 Petri dish. Melt the agar in the bath with hot water. >> << Bottle will be very hot, so use tongs or a potholder to pick it up. Water bath method - release the lid agar bottle, but

not remove it completely. Place the bottle in hot water at 170-190

F >> << to all liquid agar. To prevent the bottle from turning, keep the water level even with the agar level. F (when the bottle

still feels warm but not hot to the touch) before filling in the Petri dish.

Move the Petri dish lid enough to pour in agar

dish. Pour enough agar to cover 1/2 to 2/3 the bottom of the dish (at

10-13ml). Do not let the bottle touch your mouth dish. Cover the dish >> << immediately to prevent contamination and tilt it forward and back while gently

agar covering the bottom of all vessels. (Fill in as many dishes as you

is for agar. You can save more down to >> << you are ready to use)

Let the Petri dish is 1:00 to strengthen agar before

use. Preparation of the sensitivity of Square One method to test the effectiveness of antibacterial agents is

use "sensitivity squares." Cut small squares of paper absorbent (or other

filter paper), then soak them in any matter you want to check out:

iodine, ethyl alcohol, antibacterial soap, antiseptic, garlic, etc. Use tweezers to handle the net

boxes so as not to pollute them. Name them with indelible ink

soak them in the selected substance and blot excess liquid with paper towel >>. Each experiment << Setting experiment should control dish that shows

growth of bacteria under normal conditions and one or more test meals in which you

change some variables and analyze the results. Examples of variables to test

on the temperature or the presence of antiseptics. How do they affect the bacteria growth

? Using a sterile swab or needle inoculation (heat sterilization in the flame

), collect bacteria from your chosen source (eg, sinks, inside

your cheek, or live culture). Remove the Petri dish and

lightly wipe swab over the surface of agar in a zigzag pattern >>. << (You can turn the dish a quarter turnover and zigzag again to ensure maximum coverage

). Cover the dish immediately. Repeat with new swab

for other dishes that you use in your experiment. Label one dish "Control."

Then in a test dish, use tweezers to

add sensitivity squares, which were packed with stuff you want

test for antibacterial properties. It's a good idea to add a simple square of paper

absorbent to see if the paper itself has no effect on the growth of bacteria >>. << For best results, use some food testing and control >> << variables, so that the conditions are the same for each food: bacteria collected with >> << the same place, are the same number of antibacterial agents that are stored on

the same temperature, etc. The more tests you perform, the more Dana

you collect, the more confident you can be on your findings. Place all dishes in the dark at room temperature place as a toilet. (If you are testing their response to different temperatures, of course >> <<).

Wait 3-7 days and explore the growth of bacteria in food without removing

century. You will see several points round growth, the colonies of bacteria.

Depending on where your collected samples of bacteria may have

several species of bacteria (and even some forms!) Growing in your dishes. Different types of colonies have different colors and textures. When you have

connection or stereo microscope, try to appeal to the colony about to see more

differences. Compare the number of bacteria in the control dish worth

in the test dishes. Then compare the amount of bacterial growth around each paper square >>. << What was the bacteria that grow closer to him? Which one has

least amount of bacteria that grow beside it? If you have more than one test

dish, the same results in all test dishes? If not, the variables in the

You think that could cause results to differently? How it affects

your conclusions? Destruction of bacteria cultures Remember to use caution experiment with bacteria. Type of bacteria >> << you can use types that are commonly found in your home >> << but you culturing them in larger quantities than usual, and it >> < <can be dangerous. When you are finished with the experiment, pour a little >> << bleach in each Petri dish, cover dishes in a plastic bag and throw her away

. Other ideas Bacteria experiment. What household cleaners are most effective against bacteria? Try to rub the surface in your home as a sink or toilet, and

use sensitivity squares to test various cleaners such as lizolu,

bleach, Windex, etc. Natural substances. Check to make sure the garlic really has antibacterial properties >>. << A tea tree oil or red pepper, curry, or? Mouthwash. Tampon of your teeth and gums and see how toothpaste or mouthwash

work against plaque bacteria on the teeth. Antibiotics. Use

to see that different antibiotics may make against bacteria.

For, learn how gram staining associated with the use of antibiotics.

You have heard people say that dogs mouths are cleaner than men? Design an experiment to test whether this is true! Some advertised as antibacterial bandages. Check to make sure

they actually work better than ordinary plaster to suppress bacteria. Is it safe to keep filling water bottle without washing? Samples

water from the bottom of the bottle with water that was used for

couple of days and compare it with a sample of recently opened, clean bottle of water >>. << You can also check if the bottle gets more bacteria if you

mouth or drink through a straw. As bacteria grow in your shoes? Is there a difference in the growth of bacteria >> << between cloth and leather shoes? Near the foot powders work to reduce bacteria

? How to grow bacteria on your toothbrush? What ways can you try

keep it clean? Mouthwash? Hot water? Some people recommend getting new mascara every six weeks, because

bacteria can grow in the tube. Check it out by comparing the growth of bacteria on carcasses

old and new, unused carcass. You can also check how many bacteria

on other types of makeup. What about the beneficial bacteria? Try more >> << to this view! .