V. Ganespathy has written:

'Attempts to intercalate tin disulphide with pyridine and aniline'

cross country.

The answer makes no sense to me, sorry. (cross country is an event, not a year). The answer is : 1906, and the official term for them is "Intercalate Games".

Ethidium bromide is a chemical that is able to intercalate (fit between the bases) between the bases of double stranded DNA strands

the lithium ion get energized and melts into the battery. Once inside it hardens right away

The DNA is a red color band under UV light on EtBr staining because EtBr intercalate and binds double stranded DNA unspecifically, when it absorbs UV light, it emits red color.