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Anonymous users2024-02-11The biuret reaction refers to the addition of a small amount to the alkaline solution of biuretCopper sulphateA dilute solution that is purplish-red or red.
Biuret reaction.
It is specific to peptides and proteins, and is an amino acid.
There is no one kind of color reaction. A bright molecule contains two aminomethyl glycogroups (i.e., peptide bonds.
co-nh-) reacts with an alkaline copper solution to form a purple or blue-purple complex.
In addition to -Co-NH-, groups such as (-conh2-), CH2-), NH2-), and CS-CS-NH2) also have this reaction.
Precautions
When identifying whether the slag bond contains protein in the biological tissue, the double urea method is commonly used.
Biuret reagents are used.
NaOH+CUSO4), which occurs in a biuret reaction.
The concentration of solution NaOH (biuret reagent A) in the biuret reagent is and the concentration of solution CuSO4 (biuret reagent B) is.
When using the biuret reagent, first add NaOH solution (2ml), shake well to create an alkaline reaction environment, and then add 3 4 drops of CuSO4 solution, shake well and observe the phenomenon. (not heated).
The above content refers to Encyclopedia - Diuret reaction.
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Anonymous users2024-02-10Biuret is an organic substance with the chemical formula C2H5N3O2, white long sheet crystal, odorless, hygroscopic.
The so-called biuret is more complicated, biuret is a substance produced by improper handling in the production process of urea, also known as biuret, and the state stipulates that urea needs to be tested for biuret content. Biuret is harmful to crops, so when you see this ingredient, you should pay extra attention to whether it will have an adverse effect on agricultural products.
Benefits of biuret
1) In medicine, it can be used to make sleeping pills and sedatives, and it also has the effect of diuresis and lowering blood pressure.
2) In industry, it can be used for fiber bleach, paper flame retardant, leather and textile coatings, foaming agents for foam plastics and sponge products, etc.
3) In agriculture, it can be used as a long-lasting nitrogen fertilizer.
4) In animal husbandry, it can be used as a feed additive for ruminants, which can improve the daily gain and feed intake of cattle, and affect the digestion and utilization of dry matter, crude fiber, energy substances and nitrogen balance of cattle.
The above content reference: Encyclopedia - biuret.
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Anonymous users2024-02-09Hello dear, what does it mean to sell a laughing and shrinking biurea, and is there any harm to fruit trees to burn seedlings. Biuret is a substance formed by the chemical reaction of urea molecules at high temperature, also known as diurea, which is harmful to seed germination and fruit tree growth. Inhibits capillary roots.
Biuret can inhibit and damage the capillary roots of seedlings, even if the fruit tree is already an adult, it can still be damaged, and it can also reduce the fruit tree's ability to absorb fertilizer. Fertilizer. When producing fertilizers, if there is a change in the production process or improper control, the biuret contained in the fertilizer will exceed the standard, and it is easy to cause fertilizer damage and burning holes after application.
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Anonymous users2024-02-08The diuret reaction can occur.
A small amount of copper sulfate dilute solution is added to the alkali solution of biuret, and the solution is purple-red or red, and this reaction is called biuret reaction. The biuret reaction requires the molecule to contain two or more peptide bond structures, so the answer is urea.
Urea is a white long sheet crystal, odorless, hygroscopic, and contains 4 molecules of crystal water in the crystallizer. It loses water at about 110 degrees Celsius, decomposes at 193 degrees Celsius, and forms melamine at temperatures above 193 degrees. Soluble in ethanol and slightly soluble in ether.
Urea (urea), also known as urea, carbaamide Nianshou, the chemical formula is CH4N2O or CO(NH2)2, is an organic compound composed of carbon, nitrogen, oxygen and hydrogen in dust, and is a white crystal. One of the simplest organic compounds, it is the main nitrogen-containing end product of protein metabolism in mammals and some fish.
As a neutral fertilizer, urea is suitable for a wide range of soils and plants. It is easy to preserve, easy to use, has little damage to the soil, is a chemical nitrogen fertilizer with a large amount of use, and is also the nitrogen fertilizer with the highest nitrogen content. Ammonia and carbon dioxide are used in industry to synthesize urea under certain conditions.
Melting Point: Boiling Point: Standard atmospheric pressure.
Water solubility: 1080 g l (20).
Density: g cm.
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