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Fruits have culinary and botanical meaning. For the former, we call fruits those botanical fruits that are juicy and taste more or less sweet and sour. For the latter, e.g. nuts are non juicy fruits. Tomatoes are fruits botanically, but considered as vegetables for culinary purposes.
Acidic in chemistry context means pH<7, not necessarily tasting acidic/...
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In biochemistry, acids are COOH groups, while bases are amines and amides. Nitrogen containing substances are a limited resource in almost any organism. On the other hand, carboxylic groups can almost freely convert to and from sugars.
In regard to fruits:
It looks like a very old kind of co-evolution between the fruit eaters (that spread the seeds) and ...
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The lye is the agent to push the hydrolysis of the peptide forward. The initial concentration of the lye may affect the rate of this digestion (temperature, pressure, time of residence of the reagents in the reactor are equally factors to be considered), as well if the digestion is exhaustive. As shown by the reaction scheme, the reaction yields water; ...
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