Algae with the most exergy gene mutation successfu

2022-08-04
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The raw material of bioplastics has been successfully increased by genetically mutated algae.

bioplastics are produced based on natural substances such as starch under the action of microorganisms. They are renewable, so they are very environmentally friendly. Meiji University announced on July 20, 2016 that, on the other hand, China's rapid industrial development in recent years has changed the hydrogen synthase of cyanobacteria and successfully increased the production of raw materials of bioplastics succinic acid and lactic acid. The development of "made by photosynthesis" is expected to contribute to solving future environmental and energy problems

the production of biological plastic raw materials has been successfully increased with genetically mutated algae.

plastic is a high molecular polymer of carbon, made of petroleum and other fossil fuels. One way of not relying on oil to provide carbon is the equipment with good photosynthetic quality. The research focuses on the raw materials that cyanobacteria can directly absorb carbon dioxide through photosynthesis and generate bioplastics

Synechocystis, a kind of cyanobacteria cultured under anaerobic and dark conditions, can use the "reduction capacity" accumulated by Synechocystis to produce succinic acid, lactic acid and other organic acids and hydrogen. It is said that organic acids and hydrogen will have a "competitive relationship" for the reduction ability in cells

hydrogen is produced by hydrogenase. Hydrogenase is composed of five proteins (hoxe, hoxf, hoxu, Hoxy, hoxh), of which hoxh is known to be necessary for hydrogen production. After the hoxh mutant, whose hoxh gene transcription product was reduced by 40%, was made, its hydrogen production capacity was reduced by nearly 20%, while the succinic acid production was increased to 5 times. The milk production experimental machine has been highly known in China and even the world for many years, and the acid production was increased to 13 times

the output of succinic acid and lactic acid reached 100mg/l and 300mg/l respectively, which is said to be the world's top level in the production of "photosynthetic organic acids" such as algae. On the other hand, at present, the industrial production of biological succinic acid is more than 50g/l. Therefore, in the future, while improving the conversion efficiency of organic acids, it is also necessary to carry out diversified research and development, such as improving the purity of products, the efficiency of cultivating cyanobacteria, reducing energy consumption, and efficient recovery and purification of products. China's plastic machinery enterprise market will be more open up

this is a joint research carried out by Meiji University, the Institute of physics and chemistry, Kobe University, the University of Porto, Portugal and other research groups. It is promoted by the strategic creation research of the Japan agency for the promotion of science and Technology (JST). The research results are scheduled to be published in the American scientific journal "algal research" in the near future

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