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Most sorbitol is made from potato starch, but it is also found in nature, for example in apples, pears, peaches, and prunes. [4] It is converted to fructose by sorbitol-6-phosphate 2-dehydrogenase. Sorbitol is an isomer of mannitol, another sugar alcohol; the two differ only in the orientation of the hydroxyl group on carbon 2. [5]
A prune is a dried plum, most commonly from the European plum (Prunus domestica) tree.Not all plum species or varieties can be dried into prunes. [3] A prune is the firm-fleshed fruit (plum) of Prunus domestica varieties that have a high soluble solids content, and do not ferment during drying. [4]
Fresh fruit is frozen and placed in a drying chamber under a vacuum. Heat is applied, and water evaporates from the fruit while it is still frozen. [14] The fruit becomes very light and crispy and retains much of its original flavor. Dried fruit is widely used by the confectionery, baking, and sweets industries.
Prune juice is a fruit juice derived from prunes (dried plums) that have been rehydrated. [3] It is mass-produced, usually via hot extraction, though juice concentrate is typically produced using a low-temperature method. It may be used as a dietary supplement to act as a laxative. It is also sometimes used as a flavor enhancer in tobacco products.
Fruits are usually of medium size, between 2–7 centimetres (0.79–2.76 in) in diameter, globose to oval. The flesh is firm and juicy. The fruit's peel is smooth, with a natural waxy surface that adheres to the flesh. The plum is a drupe, meaning its fleshy fruit surrounds a single hard fruitstone which encloses the fruit's seed.
Ziziphus spina-christi, known as the Christ's thorn jujube, is an evergreen tree or plant native to the Levant, East Africa, and Mesopotamia. [3] Fruit and leaves from the tree were used in preparing ancient Egyptian foods, in cultural practices, and in skincare routines - especially with qasil powder derived from the Ziziphus spina-christi tree leaves.
Sorbitol dehydrogenase is an enzyme in carbohydrate metabolism converting sorbitol, the sugar alcohol form of glucose, into fructose. [2] Together with aldose reductase , it provides a way for the body to produce fructose from glucose without using ATP .
Pear trees, both domestic and perry varieties, grow incredibly slowly, taking up to, if not over, a decade before they bear enough fruit for harvest. [10] They also grow to a considerable height and can have very large canopies; the largest recorded , a tree at Holme Lacy , which still partly survives, covered three-quarters of an acre and ...