WHAT IS A WALNUT?

Walnuts - http://www.healthfitnessrevolution.com/


Walnuts are rounded, single-seeded stone fruits of the walnut tree. It is enclosed in a green, leathery, fleshy husk, but this husk is inedible. After harvest, the removal of the husk reveals the wrinkly walnut shell, which is in two halves. This shell is hard and encloses the kernel, which is also made up of two halves separated by a partition.

Split walnut fruit
Walnut seeds are high density source of nutrients, particularly proteins and essential fatty acids. Like other tree nuts, walnuts must be processed and stored properly. Worryingly, poor storage makes walnuts susceptible to insect and fungal mould infestations; the latter produces aflatoxin - a potent carcinogen. Mould infested walnut seed batch should not be screened then consumed - the entire batch should be discarded.

The seed kernels - commonly available as shelled walnuts - are enclosed in a brown seed coat which contains antioxidants. The antioxidants protect the oil-rich seed from atmospheric oxygen so preventing rancidity.

As mentioned previously there are two major varieties of walnuts grown for its seeds — the English walnut and the Black walnut. The Black walnut is of high flavour but due to its hard shell and poor hulling characteristics it is not grown commercially for nut production. The commercially produced walnut varieties are nearly all hybrids of the English walnut.

For related articles click onto the following links:
HOW TO GROW THE WALNUT TREE
WHAT IS A WALNUT?

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