The child asked me why cotton changes color and how is it more appropriate?

When the cotton grows to.

When there are six or seven leaves, flower buds appear, and the flower buds are surrounded by three bracts, which is beautiful. After the cotton buds, after a considerable period of time, its interior gradually grows and develops into flowers, and soon the flowers open, and the flowers generally open in the early morning. The most interesting thing is that after the flowers open, they have to change color several times, the first flowers are white, and soon, they gradually turn light yellow, and by the afternoon they begin to turn pink or red, and by the next day they become more red, even purple, and finally the whole corolla turns gray-brown and falls off from the ovary, at which time the ovary begins to develop, gradually expands, and becomes a cotton peach.

Because the flowers of cotton change color several times, and the flowers of each part of the cotton plant open at a later time, these flowers are still white, and those flowers have become red, purple, ......So it looks like there are several different colored flowers on the same cotton.

It is determined by flavonoids.

Flavonoids, also known as anthocyanins, are the basic substances that determine the color of the flower, and the colorful color is its contribution, it is lively and active, and the color often changes with the external conditions, such as acidity, alkalinity and light.

The flowers are white when they first open, the stamens turn pale yellow when ripe, and after pollination, they begin to turn pale red, and the fruits begin to develop dark red. White and yellow can better reflect ultraviolet rays, attract insects and promote pollination, and after successful pollination, they become less reflective colors to avoid insects laying eggs. This is also cotton's self-defense.

I think it's scientific and easy to understand.

Cotton is originally white, but if it is damp and moldy, it will turn black or green, because the color of the mold is black or green. The yellowing is caused by oxidation of the plant fibers under high humidity conditions.

You tell him: Just like a person, the child is white and fat, pink when he grows up, and black and red when he is old. And then it's old.

Some people think of it as the source of these colors.

Like the color of other flowers, they are born like this. Not really. As long as you pay close attention, the cotton flowers will change color several times after they open.

Generally, the first flowers are milky white, and soon gradually change from milky white to pink, then from light red to red, and finally to purple red. Why does cotton corolla change color? Because the opening time of each part of the cotton plant is different, several different colors will appear on the same cotton plant at the same time, mainly because when the cotton is in bud, the cells of the petal tissue contain a variety of pigments, such as anthocyanins, carotene and lutein, etc., and the main anthocyanins.

Anthocyanins are mainly composed of enzymes and pigments, and they are lysoluble in petal cell tissues. The content of anthocyanins is less in cotton before flowering, and the corolla is blue and pale color. After flowering, the respiration of cotton plants was enhanced, which also promoted the increase of anthocyanin content in cotton petals.

Anthocyanins increase the acidity of the cell fluid, and the color of the petals gradually deepens in the direction of red, showing a red color. The color of cotton flowers can turn red, purple, and blue because the anthocyanins in the petals are working. The accumulation of anthocyanins is mainly the result of the enzyme action in cotton plants.

The presence or absence of cotton corolla color is determined by the presence of anthocyanins, and the change of its color is determined by the pH value of the medium.

After reading Zilong's answer, let's summarize:

1. The composition of dust is not only granular, but also filamentous and fiber;

2. The moisture in the air can make the dust (granular or filamentous) stick into larger and longer dust;

3. Electrostatic action;

4. The activity of dust mites, secretions, and corpses may make dust stick (may have an impact);

5. Human or animal hair, dander ......(Of course, the absence of these does not affect the formation of flocculent dust);

6. Finally, there is the air flow.

The first 3 points should be the main reason.

In addition, a lot of flocculent is formed during cleaning, and the most likely explanation is that the wet mop and static electricity cause the dust to stick together quickly. So what looks like it's all gray turns into flocculent when it's cleaned.

No, it means that it is pure natural and non-bleached. You can use it with confidence, just wash it twice.