Guide
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Green leaf - a small factory of oxygen, so necessary for breathing humans and animals that inhabit the Earth.Green leaves and herbs familiar eye and evokes pleasant thoughts of freshness and health.And this is true, because the green leaves - alive.And, as in all living organisms, they occur chemical processes essential for life.These processes are essential for plant growth, its nutrition and respiration.
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What is the chemical process takes place in the leaf, promoting its green coloring?This process is called "photosynthesis" and carried out in two stages.The first step - the absorption of light, the second step - the use of light in a chemical reaction (interaction of carbon dioxide and water).
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light absorption occurs by means of an adhesive, a pigment called "chloro
phyll."Light has a wide color spectrum, but the chlorophyll does not absorb any light quanta, but only with a specific wavelength of light, because it affects the rate of photosynthesis.
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fastest this process occurs in the blue-violet and red portions of the spectrum, it means that these colors absorb chlorophyll.The green color of the spectrum gives the process a very minimal rate, and therefore, is not absorbed but is reflected from the sheet.
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The human eye is able to distinguish the color only when sufficient light, so he sees reflected the green spectrum, which is an indication that the plant photosynthesis.
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present in the leaves and other pigments, but their effect is too weak and drowned out the influence of chlorophyll.When the world becomes smaller, for example, in the fall, the chlorophyll disappears, and their role is becoming a major and leaves acquire other colors - yellow or red.
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In the second stage of photosynthesis, a chemical reaction of a compound of carbon dioxide from the atmosphere (exhaled by humans and animals), and water from the root system.This reaction results in the formation of glucose and other nutrients and oxygen evolution.The substances are useful both for the plant and for the people and animals who use it for food.
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role of oxygen on the planet is huge: it is needed for breathing and provide all the vital processes in humans and animals, as well as other chemical processes, such as combustion, in which carbon dioxide is also released.Therefore, the plant is called "lungs of the planet."