1. Chili
Pepper, alias: horn pepper, long pepper, vegetable pepper, lantern pepper, annual or limited perennial herbs of Solanaceae and Capsicum. Stems subglabrous or puberulent, branches slightly zigzag. Leaves alternate, the top nodes of branches are not elongated to form twins or clusters, oblong, oval, ovoid or ovoid-lanceolate, entire, short tapering or acute at the top, and narrow wedge at the base; Flowers solitary, drooping; Calyx cup-shaped, inconspicuously 5-toothed; Corolla white, lobes ovate; The anthers are grayish purple. The fruit stalk is thick and drooping; The fruit has long fingers, the tips of which gradually become sharp and often bend. It is green when it is immature, and turns red, orange or purple when it is mature, which is spicy. Seeds flat kidney-shaped, pale yellow.
2. Strawberries
Strawberry is a perennial herb. Height 10-40 cm, stem lower than leaves or nearly equal length, densely yellow pilose. Leaves trifoliate, leaflets short peduncle, thick texture, obovate or rhombic, dark green above, almost hairless, pale white-green below, sparsely hairy, dense along veins; Petiole densely spreading yellow pilose. Cymes, with a short-stalked leaflet below the inflorescence; Flower bisexual; Sepals ovate, slightly longer than accessory sepals; Petals are white, suborbicular or obovoid. Aggregate fruit is large, with persistent sepals standing upright and attached to the fruit; Achene apex ovoid, smooth. The flowering period is April-May and the fruiting period is June-July.
3. Lemon
Lemon, a citrus plant in Rutaceae, is also called lemon fruit, foreign lemon and beneficial mother fruit. Small trees with little or no thorns, dark purple leaves and buds, thick papery leaves, oval or ovoid. Flowers axillary or rarely clustered. The fruit is oval or ovoid, the peel is thick, usually rough, lemon yellow, the juice is sour to very sour, the seeds are small, ovoid and sharp; Seed coat is smooth, cotyledons are milky white, usually single embryo or multi-embryo. The flowering period is April-May, and the fruiting period is September-165438+1October.
4. Chinese chives
Chinese chive (scientific name: A. tuberosum Rottl). ex Spreng。 Alias: Fengben, Caostalactite, Qiyangcao, Lazy Vegetable, Changshengjiu, Yangyangcao, Flat Vegetable, etc. It is a perennial herb of Liliaceae, with strong smell, recumbent rhizomes, narrow conical bulbs and clumps; Scaly skin is yellow-brown, reticulate and fibrous; Leaves basal, strip, flat; Umbel, terminal.
5. Citrus fruit trees
Citrus belongs to Rutaceae. Sex likes warm and humid climate, and its cold tolerance is slightly stronger than pomelo, lime and sweet orange. The plants of Rutaceae and Citrinae are distributed between north latitude 16 ~ 37. It is a tropical and subtropical evergreen fruit tree (except Fructus Aurantii), and there are three genera of Fructus Aurantii, Citrus and Kumquat used for economic cultivation. Citrus grown in China and other countries in the world is mainly citrus.
The structure of vitamin C is similar to that of glucose, and it is a polyhydroxy compound. The second and third adjacent enol hydroxyl groups in its molecule are easy to dissociate and release H+, so it has the nature of acid, also known as ascorbic acid. Vitamin C has strong reducibility and is easily oxidized to dehydrovitamin C, but its reaction is reversible. Ascorbic acid and dehydroascorbic acid have the same physiological function. However, if dehydroascorbic acid continues to oxidize to diketones, the reaction will be irreversible and lose its physiological function completely.
The main food sources of vitamin C are fresh vegetables and fruits. Among vegetables, peppers, chrysanthemums, bitter melons, beans, spinach, potatoes and leeks are rich in content; Among fruits, jujube, fresh jujube, strawberry, citrus and lemon are the most abundant. There is also a small amount of vitamin C in animal viscera.
Extended data:
taboo
1. According to the absorption rate, it is better to take vitamin C three times a day immediately after meals, which can also prevent the side effects caused by large doses of vitamin C. However, it should be noted that patients with digestive tract ulcers should pay attention to avoid irritating the ulcer surface, leading to ulcer deterioration, bleeding or perforation.
2. People with poor renal function should not take more vitamin C. Long-term overdose of vitamin C may cause hyperacidity, gastric reflux and even urinary calculi. Especially people with kidney deficiency should eat less vitamin C.
Don't stop taking vitamin c suddenly after taking a lot. If the sudden withdrawal of vitamin C will cause the withdrawal reaction of the drug, which will aggravate or recur the symptoms, it should be gradually reduced until the drug is completely stopped.
4. Vitamin C should not be combined with isoniazid, aminophylline, streptomycin, penicillin and sulfonamides; Otherwise, the efficacy of the above drugs will be reduced or ineffective due to acidic environment.
5. Vitamin C has a destructive effect on vitamin A, especially after taking a large amount of vitamin C, it will promote the excretion of vitamin A and folic acid in the body. Therefore, while taking a large amount of vitamin C, we must pay attention to the sufficient amount of vitamin A and folic acid.
6. Vitamin C combined with aspirin enteric-coated tablets will accelerate its excretion and reduce the curative effect.
7. Don't take ginseng while taking vitamin C.
8. the combination of vitamin c and folic acid will also weaken their respective effects. If you need to treat anemia, you can use it intermittently and not at the same time.
9. taking medicine indiscriminately will lose vitamin c in the body. If you take medicine without the doctor's permission, it will not only damage your health, but also cause the loss of vitamin C in your body.
10. Vitamin C tablets should be stored in a cool and dark place to prevent deterioration and failure.
1 1. Take vitamin C and avoid eating animal liver. Vitamin c is easily oxidized. If copper ions are encountered, the oxidation speed can be accelerated. The copper content in animal liver is very high. If you eat animal liver during taking vitamin C, vitamin C will rapidly oxidize and lose its biological function.
References:
Baidu encyclopedia-vitamin c