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Anthocyanins may be used as pH indicators because their color changes with pH; they are red or pink in acidic solutions (pH < 7), purple in neutral solutions (pH ≈ 7), greenish-yellow in alkaline solutions (pH > 7), and colorless in very alkaline solutions, where the pigment is completely reduced. [57]
No detectable phytate (less than 0.02% of wet weight) was observed in vegetables such as scallion and cabbage leaves or in fruits such as apples, oranges, bananas, or pears. [22] As a food additive, phytic acid is used as the preservative E391. [23] [24]
During fruit ripening, gluconeogenesis also increases. [9] Acids are broken down in ripening fruits [12] and this contributes to the sweeter rather than sharp tastes associated with unripe fruits. In some fruits such as guava, there is a steady decrease in vitamin C as the fruit ripens. [13]
A lime is a citrus fruit, which is typically round, green in color, 3–6 centimetres (1.2–2.4 in) in diameter, and contains acidic juice vesicles. [ 1 ] There are several species of citrus trees whose fruits are called limes, including the Key lime ( Citrus aurantiifolia ), Persian lime , Makrut lime (kaffir lime), finger limes , blood limes ...
The sweet orange, Citrus x sinensis, [10] is not a wild fruit, but arose in domestication in East Asia. It originated in a region encompassing Southern China, Northeast India, [11] and Myanmar. [12] The fruit was created as a cross between a non-pure mandarin orange and a hybrid pomelo that had a substantial mandarin component.
Choy sum is a green leafy vegetable similar to gai lan, and can be characterized by the distinct yellow flowers which it bears.Each flower has four yellow, oval to round petals with six stamens on fleshy, erect stems which are 0.5 to 1 centimetre (1 ⁄ 4 to 1 ⁄ 2 inch) in diameter and 15 to 20 cm (6 to 8 in) tall with light to dark green, and are oval (becomes acuminate shaped, or basal ...
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[2] [9] For the soil a pH of 4.5 to 8.2 is needed. [ 2 ] [ 9 ] The plant prefers a fertile, humus-rich, well-drained alluvial soil but also grows well in suboptimal soil conditions. [ 10 ] Before sowing, the soil is prepared carefully by plowing and the seeds are broadcast or dribbled behind the plow in the wet season.