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Photosynthesis is the process by which plant cells, algae, and some bacteria, capture light energy and change it to chemical energy. Almost all of the world? s energy is provided through photosynthesis. The equation for photosynthesis is CO 2 + 2 H 2 A + light energy> (CA. Photosynthesis is in two stages: a series of reactions that need light and certain temperatures and a series of reactions that don? t need light but need certain temperatures.
The rate of the light reaction, can be sped up by increasing the amount of light (with some limits). In the dark reaction, their rate can be increased by increasing the temperature (with some limits), but not changing the amount of light. The first step in photosynthesis is absorbing light by pigments. The Chlorophyll captures light energy (violet and red) and transforms it into chemical energy. The chemicals involved with photosynthesis are organized into units of the chloroplasts called thylakoids. Light is absorbed by pigments, raising their electrons to higher energy levels.
The energy is the put into the chlorophyll through a reaction center. Now here are some of the creators of ideas of photosynthesis. If it weren? t for people who did such things as discovering oxygen, finding chemical reactions in plants, and discovering biology as a science, we would know very little about photosynthesis or any kind of science at all.
Jan Baptista van Helmont (1580 - 1644) was a Belgian physician and chemist. Helmont was the first scientist to tell the difference between gases and air. He invented an early type of biochemistry, named iatrochemistry. Helmont thought that the main elements of the universe were air and water. Melvin Calvin is an American chemist and Nobel prize winner. Calvin studied photosynthesis and plants that produce fuel oil.
Calvin started his experiments in photosynthesis during the 1940? s. He used carbon- 14 to detect chemical reaction chains produced by plants in converting carbon dioxide and water into oxygen and carbohydrates. Joseph Priestley is a British chemist, who isolated and described several gases, including oxygen.
In 1774, Priestley discovered oxygen and described its role in combustion and in respiration. Priestley didn? t understand how important his discovery was. If Priestly hadn? t made the discovery, the theories of photosynthesis may never had been realized. Priestly also discovered ammonia, nitrous oxide, sulfur dioxide, and carbon monoxide.
He opposed the new theories of Antoine Lavoisier, who named oxygen, and described it correctly.
Free research essays on topics related to: light energy, photosynthesis, amount of light, oxygen, chemical energy
Research essay sample on Amount Of Light Chemical Energy
