Why are there shells on the beach?

Because some light-weight shells (newborns) or shells with weak resistance die, they will be very light because there is no living thing in the shells. When the sea is at high tide at night, those mussels will be washed ashore by the waves.

Immature shells are very similar to mature shells, but they are different in size. Bivalves grow along the edges of two shells, and the growth direction of the shells remains unchanged when they grow up. Gastropods coil themselves along the mouth of the spiral tube.

Molluscs have been able to adapt to different living environments, from rocks washed by seawater day and night to the dark deep sea floor, and have their own special mollusk groups.

Tides affect the characteristics and distribution of mollusks growing on the seashore, and sufficient sunshine can provide sufficient food. Molluscs are best suited to live in tropical areas, and there are an amazing number of seashells.

Extended data

Studies have shown that shells contain a variety of bioactive components. On the one hand, these components have good biological activity, on the other hand, their microstructure has changed during the processing and extraction, which has stimulated their biological activity.

It is found that the activated calcium oxide prepared from scallop shells has better activity and more obvious antibacterial effect than ordinary calcium oxide. Preparation of bioactive material hydroxyapatite from waste shells. Nano-banded hydroxyapatite with high purity and uniform size was successfully prepared by water bath heating method with shell powder as raw material, diammonium hydrogen phosphate as phosphorus source and urea as additive.

The shell was soaked in phosphoric acid buffer for 24 hours, and a layer of flaky apatite carbonate was deposited on the surface of the shell by dissolution-recrystallization reaction. The results show that the prepared apatite has good biological activity in vitro. Therefore, based on the biological activity of shells and their components, it can be used to study shell-based biomaterials and bioactive substances.

In addition, based on the shell structure, the resource utilization technologies of shell waste at home and abroad are summarized. The advantages of shell powder and light calcium carbonate in improving the strength and properties of paper were compared and analyzed. It is found that shells have certain medicinal value.

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