23考研外刊阅读《新科学家》双语精读版训练--科学家发现爱吃塑料...



And in India, which is the region’s biggest grain supplier and provides hundreds of millions of its own citizens with food rations, the reduced wheat harvestha

And in India, which is the region’s biggest grain supplier and provides hundreds of millions of its own citizens with food rations, the reduced wheat harvesthas resurfacedlongstanding concerns about food security and curbed the government’s ambitions to feed the world.

印度是该地域最大的食粮供给国,为本国数亿国民供给食粮配给,小麦减产再次激发了人们持久以来对食粮平安的担心,并按捺了该国当局为世界供粮的大志。

1.ration: a fixed amount of food given to a soldier or member of a group

2.resurface: to appear again after being lost or missing

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Enzymesproduced by gut bacteria in larvae of thebeetleZophobas morio can digest polystyrene. The enzymes could be adapted to degrade plastic in recycling plants. A previous study had found that another type of beetle larvae can eat and digest the expanded polystyrene used in packaging thanks to the action of Serratia fonticola bacteria in their guts.

大麦虫甲虫的幼虫肠道细菌发生的酶可以消化聚苯乙烯。这类酶可以用于收受接管厂的塑料降解。以前的一项钻研发明,因为另外一种甲虫幼虫肠道里存在沙雷氏菌,它们可以吃下并消化包装袋中利用的膨胀聚苯乙烯。

Now, researchers have identified polystyrene-degrading bacterial species in the guts of Z. morio larvae – which are known as “superworms” because of their size.“We are the first ones to use a high-resolution method [to identify] potential polystyrene-degrading enzymes in the microbes of the superworm guts. We could also identify the bacteriallineagesthat possess these polystyrene-degrading capabilities,” says Christian Rinke at the University of Queensland, Australia.

如今,钻研职员在大麦虫甲虫幼虫的肠道中发明了可以降解聚苯乙烯的细菌菌种,这类幼虫因其体型而被称之为“超等蠕虫”。“咱们是首个利用高辨别率法子来辨认超等蠕虫肠道微生物中存在潜伏可降解聚苯乙烯的酶的团队。咱们还可以辨认出具备这些降解聚苯乙烯能力的细菌谱系,”澳大利亚昆士兰大学的克里斯蒂安·林克说。

They found that these microbes produced a class of enzymes called hydrolases that use water to degrade the plastic polymer intostyrene monomers, which are then broken down inside bacterial cells. The team divided 171 superworms into three groups that were each fed either wheat bran, polystyrene or no food at all for three weeks. The researchers found that the worms began to chew their way into blocks of polystyrene within a day.

翻译划线句,长按文末小步伐码打卡,谜底下期颁布~钻研小组将171只超等蠕虫分成三组,在三周的时候内,一组喂麦麸、一组喂聚苯乙烯,另外一组不喂任何食品。钻研职员发明,蠕虫不到一天的时候就起头品味聚苯乙烯块了。

“A possible way to work with the superworms is to provide food waste or agricultural bioproducts with the polystyrene. This could be a way to improve the health of the worms and to deal with the large amount of food waste in Western countries,” says Rinke. But the researchers are more interested in creating a superworm-free system that takes inspiration from the insects.




“操纵超等蠕虫的一种可能的法子是给它们供给含有聚苯乙烯的食品残渣或农业生物成品。这多是一种改良蠕虫康健和处置西方国度大量食品挥霍的法子,”林克说。但钻研职员更感乐趣的是缔造一个从虫豸身上获得灵感的不含超等蠕虫的运作体系。

“We will focus on creating a system thatmimicsthe mechanical degradation of plastic by the superworm, followed by further degradation by bacterial enzymes… intometabolitesthat can then be used by other microbes to produce chemical compounds of higher value, such as the bioplastic polyhydroxyalkanoate,” says Rinke.

林克说:“咱们将着眼于制造一个仿照超等蠕虫机器降解塑料的体系,然后由细菌酶进一步降解……酿成可由其他微生物操纵的代谢物,发生价值更大的化合物,比方生物塑料聚羟基烷酸酯。”

本文节选自:New Scientist (新科学家)

公布时候:2022.06.09

辞汇堆集

1.enzyme

音标/??nza?m/

n. 酶

2.beetle

音标/?bi?t?l/

n. 甲虫

v. 仓促地走; (人的眉毛)凸起,悬垂; 用大槌捶

3. lineage

音标/?l?n??d?/

n. 血统,世系

4.mimic

音标/?m?m?k/

n. 长于仿照的人; 会摹拟的动物(或植物)

v. 仿照(人的言谈举止); 摹拟(外观或结果); 摹拟(另外一莳植物或动物); 摹拟(另外一物资)的心理感化

adj. 摹拟的,演习的

5.metabolite

音标/m??t?b??la?t/

n.代谢物

词组搭配

1.styrene monomer 苯乙烯

写作句总结

A possible way to work with the superworms is to provide food waste or agricultural bioproducts with the polystyrene.

布局: A possible way to work with the … is to ….

操纵…的一种可能的法子是…

例句: A possible way to work with the water heater is to trap energy from the sun.

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