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Experiment preparation

Introduction of disinfectants to be tested

First of all, I will experiment with the disinfectant that I investigated in the research from last year. The disinfectants are as follows.

bleach
It is said that bleach can be used to sterilize flowers. If you add too much, it will damage the flowers, so according to shufuse, it is recommended to add 1 to 2 drops of bleach to 200 ㏄ of water. I chose it because it is easy to obtain and its effect on flowers is famous.
Carbonated water
Add carbonated water to sterilize. The main components of carbonated water are carbon dioxide (carbon dioxide) and water. This carbonic acid sterilizes. According to ALLABOUT gourmet, "viruses and microorganisms cannot survive in carbonic acid." Carbonated water is weakly acidic and sterilizes it.
copper
It is said that a 10-yen coin is effective for sterilization in water. The copper contained in the 10-yen coin has a bactericidal effect and helps prolong the life of the flowers. Copper is said to have the strongest bactericidal activity among metals.

Preparation for the experiment

I am putting natural water in a graduated cylinder.
I haven't used it in the image, but it's very difficult to put it in a PET bottle without using a funnel.

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I am putting sugar in a graduated cylinder.
Since sugar is packed individually, it is unlikely to slip.

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I put bleach in a graduated cylinder of bleach.
It was difficult to put it from the dropper little by little.

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I put flowers in a graduated cylinder.

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How to choose the type of cut flowers

For the experiment, we will use a flower called gerbera this time. The reason is that gerbera has more bent stems and withers than other flowers, and it is easier to see how it is withered than other flowers. Also, the reason for changing the color to red shows our enthusiasm.

フラワーポーション

experimental method

1 First, cut the copper plate into three squares of about 1 cm and fillet with water.
2 Add 100 ml of water to 21 graduated cylinders from the watering can.
3 Put a copper plate in 7 of them and 10 ml of carbonated water in 7 of them.
4 Add 800 ml of water and 4 ml of bleach to the watering can, and add 100 ml to the remaining graduated cylinder.
5 Put 5 grams of sugar (granulated sugar) in all graduated cylinders.
6 Finally, wait for a few days, check the reduced amount, measure the length of the stem, and then continue at the same rate.

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Everyone's expectations

Which fungicide will make the flowers last longer? I made a prediction.

 Y.I's forecast
 Carbonated water
Reason: Because it is upward compatible with water.
 K.A's forecast
 bleach
Reason: I think it has a high bactericidal effect.
 T.U's forecast
 Copper plate
Reason: Bleach is too strong and carbonated water is likely to nourish the bacteria.
 H.I's forecast
 Copper plate
Reason ... Copper has a bactericidal action.
 M.K's forecast
 water
Reason ... I thought that water had few extra substances.
modoru