Reaction of the Amine and the CarbohydrineThe reaction between the amine group and the sugar would occur. The Millard reaction was a non-alcoholic browning reaction that was widely distributed in the food industry. It referred to a series of complex reactions between reducing sugar (Carbohydra) and protein/protein (which could provide an amine group) in food at room temperature or when heated. The result was the formation of a brownish-black molecular substance, melanoid-like substance or melanoid-like substance. In this process, hundreds of intermediate molecules with different smells were produced, including reducing ketones, acids, and heterocycles. These substances provided pleasant flavors and attractive colors for food.
In addition, in a narrow sense, the maillard reaction was a reaction between an acid and a reducing sugar. It was essentially a reaction between a carbonyl-based group and an amine-based group. The molecules that could provide an amine-based group also included protein, peptide-based molecules, and so on. If the sugar was heated to a high temperature above the melting point in the absence of an amine compound, the reaction of dehydration and decomposition of the sugar would be a caramelization reaction, which was different from the Millard reaction.
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What are the characteristics of the reaction types of the synthesis of acryl amine from acryl amine?The reaction of ammoidation of propan to acryl le has the following characteristics:
1. ** Main and side effects coexist **
- The main reaction is [CH = CH-CH3 +NH3 + O2→ CH2 = CH-CH +3H2O], and there are many side reactions in addition to the main reaction. For example,(CH2 = CHCH3 + 3NH3+3O2→3HCN + 6H2O\)(The amount of hydrogen cyanic acid produced accounts for about 1/6 of the mass of the initiator);(CH2 = CHCH3+NH3 + O2→CH3CN + 3H2O\)(The amount of methylethuron produced is about 1/7 of the mass of methylethuron);[CH2 = CHCH3 +O2→ CH2 = CHCH + H2O](The amount of acrolene produced accounts for about 1/100 of the mass of acryl rene);[CH2 = CHCH3 +O2→ 3CO2 + 3H2O](The amount of carbon dioxide produced accounts for about 1/4 of the mass of acryl rene and is the largest by-product).
- The side reactions were all strong exothermic reactions, especially the deep oxygen reaction. The existence of side reactions would inevitably reduce the yield of the target product. Not only would it waste raw materials, but it would also complicate the composition of the product, which would bring difficulties to separation and purification and affect the quality of the product.
2. ** The key role of the catalyst **
- In order to reduce side reactions and increase the yield of the target product, in addition to considering the reasonable process flow and equipment strengthening, the key was to choose a suitable catalyst. The catalyst used must make the main reaction have a low activation energy, so that the reaction can be carried out at a lower temperature, so that the side reactions such as deep oxygen, which are more favorable in terms of energetics, are suppressed in terms of dynamics.
3. ** Reaction type belongs to amidation (Oxidative Coupling)**
- The method of mixing alkene, aromatic, and their derivative with air (or oxygen) and nitrogen to produce a cyanide compound through a catalyst was called amidation. According to the classification of the reaction, this reaction was also known as an oxido-couple reaction. The amidation of propy lene to acryl lene was a representative and industrial reaction in the amidation process.
4. ** The importance of reaction products **
- The world's most important product in the series of propyls is called acryl, and its output is second only to that of propyls. It was an important component in the production of organic high molecular compounds, with more than 85% of it being used to produce polyuron. It could also be used to synthesize important engineering plastic such as ABS and SAN. It was also an important raw material for organic synthesis, which could be used to produce a series of products such as acryl amine, adiponitride, and hexandiamine. It could also be used to produce a series of fine chemical products.
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Wei Lai et5The ET5 was the second sedan after the flagship model, the ET7, and the fifth mass-produced model. It was a mid-sized luxury car. It was released on December 18,2021. The pre-production vehicles went offline on August 24,2022. The first batch of mass-produced vehicles was delivered to users on September 30th. There was a recall in January 2023. The first batch of users was delivered in Germany, Norway, the Netherlands and Sweden on April 4,2023.
In terms of cost, compared to the Audi A4L, the electric cost of the electric streetcar ET5 was lower, less than 2,000 yuan per year, while the Audi A4L's fuel cost was just over 10,000 yuan (about 8L per 100 kilometers, 15,000 kilometers per year). The insurance fee for the ET5 was 6,000 yuan per year, and the Audi A4L was just over 4,000 yuan per year. However, there was no purchase tax for the ET5. In terms of maintenance, the Audi A4L's minor maintenance cost 1000 - 1500 yuan, and the major maintenance cost 2500 - 4000 yuan. The ET5 only needed to change the gear box oil, brake fluid, and cooling fluid every 200,000 kilometers. The maintenance cost was almost negligible.
Its shortcomings included: sitting posture was too high even if it was adjusted to the lowest, which made it uncomfortable to look at the screen and navigate; The rear view of the central rearview mirror was small; there was no front spare box and the cabin cover was not protected; the center of gravity was too high in terms of power, and there was a feeling of jumping in the undulating road; Wind noise would be transmitted into the car at speeds above 110 (related to frameless doors and front and rear single-layer glass).
In terms of power system, the ET5 series adopted a four-wheel drive dual-motor chassis architecture, with a total power of 360 Kilowatts, a peak moment of 700 Newton, and a zero-hundred acceleration of about 3.6 - 4 seconds. The dynamic characteristics were different under different driving modes. The 2024 100kWh version of the auxiliary driving level L2 (L3 is available), pure battery life of 710km, front + rear motor layout. The 75-degree battery version of the test car had 490 horsepower with dual engines. It had its own characteristics such as power response, chassis performance, and steering feel under different driving modes. The car's exterior design was unique and high-class, and the interior assembly process was good. The logic of the car system menu was easy to use and smooth, but the front row ergonomics had the problem of sitting too high. On June 15, 2023, the travel edition of the NIO5 was released, starting at 298,000 yuan. In August 2023, it was officially renamed as the ET 5T.
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pas mal de rebondissements, on se demande quand ils vont arrêter de ne pas s allier et enfin de s unir