Fruit preserves specifies that the quantity of fruit juice or aqueous extracts used to make 1,000 grams of finished product must not be less than that laid down for the manufacture of extra jam. Fruit preserves Fruit preserves are preparations of fruits, vegetables and sugar, often stored in glass jam jars. Many varieties of fruit preserves are made globally, including sweet fruit preserves, such as those made from strawberry or apricot, and savory preserves, such as those made from tomatoes or squash. The ingredients used and how they are prepared determine the type of preserves; jams, jellies, and marmalades are all examples
Morphism of algebraic varieties "x" if there is a neighbourhood "U" of "x" and a neighbourhood "V" of ƒ("x") such that ƒ("U") ⊂ "V" and the restricted function ƒ:"U"→"V" is regular as a function on some affine charts of "U" and "V". Then ƒ is called regular, if it is regular at all points of "X". The composition of regular maps is again regular; thus, algebraic varieties form the category of algebraic varieties where the morphisms are the regular maps. Regular maps between affine varieties correspond contravariantly in one-to-one to algebra homomorphisms between the coordinate rings: if ƒ:"X"→"Y" is a morphism of affine varieties,