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Mosaic features of accessories:
1) Ultra low water absorption, three times lower than ordinary ceramic tiles, making ceramic tiles durable and never change color.
2) High bending strength, no damage under strong bending pressure, durable.
3) The surface appearance includes plane, cambered surface and rounded corner respectively.
4) The surface finish is high. The surface of ceramic tiles is imported glaze, and the gloss is more than three times higher than that of ordinary glaze. The surface is easy to clean and has super wear resistance.
5) The decorative effects are: ordinary gloss glaze, matte glaze, crystalline glaze, magic glaze, metal glaze, titanium gold, titanium silver, imitation stone series, etc.
Sodium potassium pump working principle introduced
Na + -K + pump - actually Na + -K + ATPase exists in the plasma membrane of animal and plant cells, it has the size of two subunits, large subunit catalytic ATP hydrolysis, the small subunit is a glycoprotein.Na + - K + ATPase undergoes conformational changes through phosphorylation and dephosphorylation, resulting in changes in affinity with Na +, K +. Large subunit to Na + state Na + binding Na, trigger hydrolysis of ATP. The energy released by the release of one ATP per hydrolysis delivers 3 Na + to the extracellular and 2 K + into the cell at the same time, resulting in a transmembrane gradient and potential difference that is particularly important for nerve impulse conduction. The membrane potential difference caused by Na + -K + pump accounts for about If the purified Na + -K + pump is assembled on the erythrocyte membrane vesicles (blood shadow), artificially increase the Na +, K + gradient on both sides of the membrane to a certain extent, when the energy held by the gradient When greater than the chemical energy of ATP hydrolysis, Na +, K + will reverse cis concentration flow Na + -K + pump, while the synthesis of ATP. One of the hallmarks of the sodium-potassium pump is that he relies on an autophosphorylation cycle in which the ion is transported. A phosphate group on the ATP shifts to an aspartate residue in the sodium-potassium pump, resulting in conformational changes. Ion pumps that transport ions by autophosphorylation are called P-type, and similarly calcium and proton pumps. They make up a family of proteins that are functionally and structurally similar. Na + -K + pump role is: â‘ maintain cell permeability, maintain the volume of cells; â‘¡ maintain low Na + high K + intracellular environment, to maintain cell resting potential. Ouabain and digoxin can inhibit the activity of Na + -K + pump in cardiomyocytes, thereby reducing the efficiency of sodium-calcium exchanger, increasing the influx of calcium ions and enhancing myocardial contractility, thus having a cardiac effect .