Biological saccharide decomposition and in vitro combustion

That's right, the decomposition of sugars in the body and the decomposition in vitro are both oxidation reactions, but the speed of the reaction is different. Breathing in the body can also be seen as a slow combustion process, with the same amount of energy being released.

Nanomaterials are materials that are in the nanoscale range (1-100 nm) or are composed of them as basic units in at least one dimension in three-dimensional space [1], which is roughly equivalent to the scale of 10 100 atoms closely packed together. In terms of size, the size of fine particles that produce significant changes in physical and chemical properties is usually below microns (note 1 m 1000 mm, 1 mm 1000 μm, 1 μm 1000 nm, 1 nm 10 angstroms), that is, less than 100 nm. Therefore, particles with a particle size of 1 100 nanometers are called ultrafine materials and are also a type of nanomaterial.

Nano alumina is white and fluffy powder, and the crystal form is -Al2O3. The particle size is 20nm; Specific surface area 160m2 g. The particle size distribution is uniform, the purity is high, the dispersion is excellent, the specific surface is high, it has high temperature resistance inertness, high activity, and it is activated alumina; Porosity; It has high hardness, good dimensional stability, strong surface acidity and certain surface alkalinity, and is widely used as new green chemical materials such as catalysts and catalyst carriers.

It can be widely used in the reinforcement and toughening of various plastics, rubber, ceramics, refractories and other products, especially to improve the compactness, finish, cold and heat fatigue, fracture toughness, creep resistance and wear resistance of polymer material products. Excellent dispersion, in solvent water; Solvent ethanol, propanol, propylene glycol, isopropanol, ethylene glycol monobutyl ether, acetone, butanone, benzene, xylene, without adding dispersant, stirring can be fully dispersed evenly. In epoxy resins, plastics, etc., it is excellent for additive use.

See the encyclopedia for details.

That's right! More than 3,000 joules of energy were released, but only a small part of it was used by the human body, and the rest was lost in heat.

That's right. Conservation according to energy!

It's just that the degree of performance of the two ways is different, the combustion in vitro is intense, and the biological oxidation is moderated and gradually released.

Sugars, fats, and eggs are oxidatively burned in the body, and finally ().

a.Carbon dioxide.

b.Pyruvic acid.

c.Water. d.Lactic acid.

Correct answer: carbon dioxide; Water.