main body

Titan had never undergone an independent safety assessment, known as certification, and a key concern was that its hull - the main body of the sub where the passengers sat - was made of layers of carbon fibre mixed with resin.

"It underlines... the main body of the show, which is trust and gut instinct," Winkleman says.

In particular, it drew attention to a series of continuing quality problems that had been occurring behind the scenes at the aircraft-maker and at its main supplier Spirit AeroSystems, which makes a number of large aircraft components including the main body.

The Israeli military said the missile apparently fragmented in midair, and that the main body was not immediately recovered.

Moreover, this change in calcium levels occurred not only in the main body of the cell but also within substructures such as mitochondria -- the tiny power plants that cells use to produce energy.