Pecan nut

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

carya illinoensis

Definition
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Like the walnut, the pecan tree belongs to the Juglandaceae family (see below). It is the economically most important of about 20 species of the genus Carya. Apart from the pecan nut, all other fruits of this genus are called hickory nuts.

General information
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Pecan nuts have a fleshy shell (mesocap), which dries out and cracks when ripe, so that the nuts fall to the ground with the shell. During processing, the kernels are freed from the nut shell and then further processed for baked goods, jams, ice cream and other products.

Occurrence
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The pecan tree originates from the southeastern states of the USA and Mexico and today grows cultivated throughout America. It is related to the hickory tree.

Note(s)
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Nuts are often very potent allergens and can cause threatening allergic reactions up to anaphylactic shock. The detection of a neoantigen (approx. 15 kDa), which is only produced by the roasting process and which led to an anaphylactic reaction, has been successful.

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Last updated on: 29.10.2020