11.   From families such as these came men with the knowledge, resources and entrepreneurial spirit that was a vital ingredient in the industrial development of their districts.

12.   A vital ingredient for exploring these five questions is imagination, and to that I now turn.

13.   I would have thought the labour market conditions are also a vital ingredient if profitability is to be passed on or shared out in higher wages.

14.   An enzyme from a similar deep ocean vent organism is already a vital ingredient in the DNA analysis technique known as the polymerase chain reaction.

15.   Another set of genes pumps in iron, a vital ingredient for bacteria and one that is particularly scarce in the stomach.

16.   But some neuroscientists believe the jury is still out on whether cortical activity really is the vital ingredient in pain.

17.   But there is another vital ingredient.

18.   He is a vital ingredient of a winning team.

19.   If Wilpon looks at the photo and sees drama, and not boldness, he is missing the vital ingredient of the scene.

20.   In reality, all this celebrity bonhomie is simply a vital ingredient in the Summer Sell.