Colored beets owe their red, orange, and yellow hues to betain pigments (p. 268), which are water-soluble and stain other ingredients. There are variegated varieties with alternating red layers of phloem tissue and unpigmented layers of xylem (p. 262); they look their best in raw slices because cooking causes cell damage and pigment leakage. When we eat beets, the red pigment is usually decolorized by high stomach acidity and reaction with iron in the large intestine, but people sometimes excrete the intact pigment, a startling but harmless event. The persistent firmness of cooked beets is caused by phenolic reinforcement of the cell walls, as in bamboo shoots and water chestnuts (p. 283).
Beet aroma comes largely from an earthy-smelling molecule called geosmin, which was long thought to originate with soil microbes, but now appears also to be produced by the beet root itself. The sugariness of beets is sometimes put to use in chocolate cakes, syrups, and other sweets.
Colored beets owe their red, orange, and yellow hues to betain pigments (p. 268), which are water-soluble and stain other ingredients. There are variegated varieties with alternating red layers of phloem tissue and unpigmented layers of xylem (p. 262); they look their best in raw slices because cooking causes cell damage and pigment leakage. When we eat beets, the red pigment is usually decolorized by high stomach acidity and reaction with iron in the large intestine, but people sometimes excrete the intact pigment, a startling but harmless event. The persistent firmness of cooked beets is caused by phenolic reinforcement of the cell walls, as in bamboo shoots and water chestnuts (p. 283).Beet aroma comes largely from an earthy-smelling molecule called geosmin, which was long thought to originate with soil microbes, but now appears also to be produced by the beet root itself. The sugariness of beets is sometimes put to use in chocolate cakes, syrups, and other sweets.
การแปล กรุณารอสักครู่..