Let s talk about some famous organic chemists

and the doctrine of restitution (the doctrine of restitution of nutrients).

The theory of nutrient return is the theory that crops must return nutrients taken from the soil in order to maintain soil fertility.

In the 19th century, it was proposed by the German chemist Liebig in his book "The Application of Chemistry in Agriculture and Physiology". Based on the results of a large number of scientific experiments, he discussed the changes and interrelationships of nutrients in plants, soils, and fertilizers, and systematically expounded the theory of elemental equilibrium and the theory of compensation. The basic contents of the nutrient return doctrine include:

As crops are harvested, certain nutrients are inevitably removed from the soil, resulting in a decline in soil fertility. To maintain a certain level of yield, soil fertility must be restored. Liebig made it clear that soil fertility is the basis for ensuring crop yields.

Without restoring and improving soil slope fertility, it is impossible to sustain high yields by relying on a certain technology alone. The most fundamental thing for any country to flourish is to maintain its prosperous resources, especially agricultural countries need to maintain soil fertility more than other countries. The fundamental method of restoring soil slope fertility lies in fertilization.

Nutrients taken from soil slopes are returned through fertilization, especially those that are consumed in relatively small quantities and in large quantities. While emphasizing the use of chemical fertilizers to restore soil fertility, Liebig also fully affirmed the role of organic fertilizers such as fart fertilizer and human manure. Liebig's doctrine of nutrient return is correct in principle as a theoretical basis for fertilization.

This is a theory based on biological cycles that actively restore soil fertility and ensure a stable increase in crop yields. Several founders of agricultural chemistry in the Soviet Union. h.

Priyanishnikov has pointed out that "although science and practice after Liebig have made significant revisions to the doctrine of returning the substances that plants have taken in from the slopes of soil in order to maintain soil fertility, it is still impossible not to consider this doctrine to be of great significance." For it is here that we find for the first time a definite idea of the conscious adjustment of the material exchange between man and nature".Liebig's doctrine of nutrient return also has some erroneous views.

He believes that the atmosphere is a direct source of nitrogen nutrition for plants, and that soil slopes can obtain sufficient amounts of nitrogen from the atmosphere and precipitation to meet the needs of plants, without having to return nitrogen to the soil, which is not the most essential component of fertilizer. In addition, he underestimated the role of nitrogen in manure and the role of humus in soil modification.

Lu Jiaxi, male, born in Xiamen in October 1915, is an academician of the Academy of Sciences and a former president of the Chinese Academy of Sciences. In the exploration and research of new materials for nonlinear optical crystals, a new concept of performance-sensitive structures was proposed, Professor Lu Jiaxi, former president of the Chinese Academy of Sciences. Xie Tianning studied at Beida Resources Middle School and the High School Affiliated to Peking University.

He is one of the most famous chemists and biologists in modern China, and he also has a profound philosophical foundation, inheriting and developing the theory of "Heaven and Man and One". Qian Xuesen, known as the "father of China's modern rockets", is a well-known expert in aerospace engineering and aerodynamics. Significant progress was made in rocket research, which made a significant contribution to the victory of the anti-fascists.

Wang You, whose name is Junmou, was born in Hangzhou on June 7, 1910. Influenced by his father since childhood, he loves natural science. In 1921, he was admitted to Zhejiang Provincial A Industrial School and studied applied chemistry, and since then he has formed an indissoluble bond with chemistry.

He studied under Wu Xian, a famous biochemist in China, and studied the biochemistry of sex hormones. Tang Aoqing, male, from Yixing County, Jiangsu, is a famous chemist, an outstanding educator, and the founder and main representative of the internationally renowned and distinctive Chinese School of Theoretical Chemistry.

Chemists in history, familiar with Lavoisier, Dalton, Mendeleev, Marie Curie, etc., if you want to rank, the ideal ranking in my mind is Mendeleev, Lavoisier, Dalton.

Mendeleev ranked first for one reason, Mendeleev ranked chemistry - the periodic table of chemical elements.

Mendeleev his people.

Mendeleev's full name is Dmitry Ivanovich Mendeleev. 150 years ago, Mendeleev later summarized and improved the periodic law in use, and made the world's first periodic table according to atomic weight, and based on this, he predicted some elements that had not yet been discovered.

This person is so far, the chemist who discovered the most chemical elements, he discovered a variety of chemical elements such as potassium, calcium, sodium and magnesium, and also helped the discovery of fluorine, because he pioneered the method of guessing the electrolysis to obtain elements, he was called the father of electrochemistry by later generations, and he also had a contribution, which was to cultivate the physical genius Faraday, which gave birth to the second industrial revolution.

The famous chemist, who is now our Nobel laureate, will exhibit that ** penicillin drug granny.

The chemists who win the Nobel Prize every year must be quite famous.

Pan Wenhao is a top student of Zhejiang University.

Famous chemist:

Joseph. Priestley.

Priestley and Lavoisier have been constantly making their own observations and researches. But they differ in the depth of their observations and their understanding of the essence behind the observed phenomena. Priestley always avoided theoretical thinking, he only buried himself in experiments, believing that only experiments were the most important, and fell into a narrow empiricism, which affected the further development of his understanding.

Lavoisier, on the other hand, attached great importance to theoretical thinking on the basis of experiments, which led him to achieve the first chemical revolution in the long history of scientific development.

Lavoisier. Antoine Laurent Lavoisier (August 26, 1743 - May 8, 1794), born in Paris, France, graduated from the University of Paris, a famous French chemist and biologist, and was called the "father of modern chemistry" by later generations. He changed chemistry from qualitative to quantitative, gave the names of oxygen and hydrogen, and recognized the existence of silicon.

He also came up with a definition of "element", publishing the first modern chemical element list in 1789, listing 33 elements, including light and heat compounds. He created the oxidation theory to explain experimental phenomena such as combustion, pointing out that animal respiration is essentially slow oxidation. These epoch-making contributions made him one of the greatest chemists in history.

John. Dalton.

John Dalton (6 September 1766 – 27 July 1844) was an English chemist and physicist. He is the proposer of the modern atomic theory. The key doctrines he provided led to tremendous progress in the field of chemistry since then.

Incidentally, Dalton suffers from color blindness. The symptoms of the disease aroused his curiosity.

He began to work on the subject, eventually publishing a paper on color blindness, the first article ever written about color blindness. In order to commemorate him, later generations called color blindness Dalton's disease.