I found this article on Realage.com and I think it is right on...
Next time you grab a handful of nuts to snack on, count to 40.
A recent study revealed that when people ate a small serving of almonds, 40 chews quelled hunger better than 10 or even 25 crunches of the same amount of nuts.
The Magic Number
Not only did the extra chews help curb hunger best, but also the feelings of fullness lasted longest when people gave the nuts the extra chews. And the practice may work with other foods, too, because researchers suspect it may simply be the mere act of chewing that switches on your brain’s satiety center.