Enhanced oxygen evolution activity in NiFe layered double hydroxides via Ce doping and oxygen vacancy engineering

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Protesters take to the streets of Tehran on Friday night

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Фото: Yurii_Yarema / Shutterstock / Fotodom,这一点在新收录的资料中也有详细论述

A tiny, articulated, near-complete osteichthyan from the early Silurian Chongqing Lagerstätte, represents the oldest osteichthyan occurrence including microfossils, and the earliest articulated remains of any bony fish in the fossil record.

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