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Eco-friendly plastic from fish waste

10.04.2021

Bioplastics could be used for almost the same purposes as conventional polyurethane, says team leader Francesca Kerton of Memorial University of Newfoundland (MUN).

Plastic based on fish waste is environmentally friendly. In addition, the invention solves the problem of recycling these food waste. After all, fish heads, bones, skin and intestines, usually sent to landfill, can be turned into a harmless, biodegradable material.

The novelty will replace polyurethane, which today can be found everywhere: in shoes, clothes, refrigerators, building materials, etc. At the same time, polyurethane is obtained from crude oil and phosgene, it has a large carbon footprint and slowly decays.

To produce the new material, the researchers used fat extracted from pieces of salmon left over from industrial processing.

Chemists have developed a method for converting fish oil into a polyurethane-like polymer. First, they added oxygen to the fat to form epoxides. The epoxides were then combined with carbon dioxide. And the resulting molecules were combined with amines containing nitrogen, resulting in a new material.

The new plastic has no fish smell.

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Man and chimpanzee: the differences are not so great 05.05.2006

An international group of American biologists has completed the deciphering of the chimpanzee genome and its comparison with the human one.

It turned out that our DNA differs from the DNA of the closest living human relative by only four percent. The chimpanzee is the fourth mammal whose genetic text has been read in its entirety. The rest are man, mouse and rat.

Humans differ from chimpanzees about 60 times less than from mice, and about 10 times less than mice and rats differ in DNA. It turned out that some genes in humans and monkeys evolved especially quickly compared to the corresponding genes in other mammals. These are, for example, genes responsible for the accelerated transmission of signals along the nerves, for the perception of sounds, for the transport of ions through cell membranes.

It is possible that it was thanks to the rapid evolution of these genes that primates were able to occupy such a prominent place in the animal kingdom.

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