Deputy US ambassador to the UN, Robert Wood, said the document "abandoned" the necessity for there to be "a linkage between a ceasefire and the release of hostages".

"Our eureka moment was when our first experiments showed it is possible to produce electricity in a cyclic rhythm and the precise linkage between this and the plant's inherent daily rhythm," Chakraborty said.

The other is a diazirine group, which can be activated by light to create stable covalent linkages between the labeled proteins and any molecules they interact with.

The meaning of the more ornate linkages is less clear.

He added, “I have suffered from dissociation all my life, but somehow the linkage between ‘qi’ and art has given me focus and hope.”