Ginger - Lecture notes 1 PDF

Title Ginger - Lecture notes 1
Author Sise Ha
Course Inorganic chemistry
Institution University of Oxford
Pages 12
File Size 697.6 KB
File Type PDF
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Description

Ginger From Wikipedia, the free encyclopedia

For other uses, see Ginger (disambiguation). Ginger

1896 color plate from Köhler's Medicinal Plants

Scientific classification Kingdom:

Plantae

Clade:

Angiosperms

Clade:

Monocots

Clade:

Commelinids

Order:

Zingiberales

Family:

Zingiberaceae

Genus:

Zingiber

Species:

Z. officinale

Binomial name Zingiber officinale Roscoe[1]

Ginger (Zingiber officinale) is a flowering plant whose rhizome, ginger root or simply ginger, is widely used as a spice or a folk medicine.[2] It is a herbaceous perennial which grows annual stems about a meter tall bearing narrow green leaves and yellow flowers. Ginger is in the family Zingiberaceae, to which also belong turmeric (Curcuma longa), cardamom (Elettaria cardamomum), and galangal. Ginger originated in the tropical rainforests from the Indian subcontinent to Southern Asia where ginger plants show considerable genetic variation.[3] As one of the first spices exported from the Orient, ginger arrived in Europe during the spice trade, and was used by ancient Greeks and Romans. [4] The distantly related dicots in the genus Asarum are commonly called wild ginger because of their similar taste. Contents [hide]

    o o    o o    

1Etymology 2Origin and distribution 3Horticulture 4Uses 4.1Regional uses 4.2Similar ingredients 5Production 6Nutritional information 7Composition and safety 7.1Chemistry 7.2Biological effects 8Medicinal use and research 9See also 10References 11External links

Etymology

Chopped Ginger

The English origin of the word, "ginger", is from the mid-14th century, from Old English gingifer, from Medieval Latin gingiber, from Greek zingiberis, from Prakrit (Middle Indic) singabera, from Sanskrit srngaveram, from srngam "horn" and vera- "body", from the shape of its root.[5]The word probably was readopted in Middle English from Old French gingibre (modern French gingembre).[6]

Origin and distribution Ginger likely originated as ground flora of tropical lowland forests in regions from the Indian subcontinent to southern Asia,[4] where its cultivation remains among the world's largest producers, including India, China, and other countries of southern Asia (see Production). Numerous wild relatives are still found in these regions,[4] and in tropical or subtropical world regions, such as Hawaii, Japan, Australia, and Malaysia.[3]

Horticulture

Ginger field

Ginger produces clusters of white and pink flower buds that bloom into yellow flowers. Because of its aesthetic appeal and the adaptation of the plant to warm climates, it is often used as landscaping around subtropical homes. It is a perennial reed-like plant with annual leafy stems, about a meter (3 to 4 feet) tall. Traditionally, the rhizome is gathered when the stalk withers; it is immediately scalded, or washed and scraped, to kill it and prevent sprouting. The fragrant perisperm of the Zingiberaceae is used as sweetmeats by Bantu, and also as a condiment and sialagogue.[7]

Uses

Ginger plant with flower

Ginger crop, hills near Kalaw, Myanmar

Ginger produces a hot, fragrant kitchen spice.[4] Young ginger rhizomes are juicy and fleshy with a mild taste. They are often pickled in vinegar or sherry as a snack or cooked as an ingredient in many dishes. They can be steeped in boiling water to make ginger herb tea, to which honey may be added. Ginger can be made into candy or ginger wine. Mature ginger rhizomes are fibrous and nearly dry. The juice from ginger roots is often used as a seasoning in Indian recipes and is a common ingredient of Chinese, Korean, Japanese, Vietnamese, and many South Asian cuisines for flavoring dishes such as seafood, meat, and vegetarian dishes. Fresh ginger can be substituted for ground ginger at a ratio of six to one, although the flavors of fresh and dried ginger are somewhat different. Powdered dry ginger root is typically used as a flavoring for recipes such as gingerbread, cookies, crackers and cakes, ginger ale, and ginger beer. Candied ginger, or crystallized ginger, is the root cooked in sugar until soft, and is a type of confectionery. Fresh ginger may be peeled before eating. For longer-term storage, the ginger can be placed in a plastic bag and refrigerated or frozen.

Gari, a type of pickled ginger

Regional uses

Fresh ginger rhizome

Two varieties of ginger

In Indian cuisine, ginger is a key ingredient, especially in thicker gravies, as well as in many other dishes, both vegetarian and meat-based. Ginger also has a role in traditional Ayurvedic medicine. It is an ingredient in traditional Indian drinks, both cold and hot, including spiced masala chai. Fresh ginger is one of the main spices used for making pulse and lentil curries and other vegetable preparations. Fresh ginger together with peeled garlic cloves is crushed or ground to form ginger garlic masala. Fresh, as well as dried, ginger is used to spice tea and coffee, especially in winter. In south India, "sambharam" is a summer yogurt drink made with ginger as a key ingredient, along with green chillies, salt and curry leaves. Ginger powder is used in food preparations intended primarily for pregnant or nursing women, the most popular one being katlu, which is a mixture of gum resin, ghee, nuts, and sugar. Ginger is also consumed in candied and pickled form. In Japan, ginger is pickled to make beni shoga and gari or grated and used raw on tofu or noodles. It is made into a candy called shoga no sato zuke. In the traditional Korean kimchi, ginger is either finely minced or just juiced to avoid the fibrous texture and added to the ingredients of the spicy paste just before the fermenting process. In Burma, ginger is called gyin. It is widely used in cooking and as a main ingredient in traditional medicines. It is consumed as a salad dish called gyin-thot, which consists of shredded ginger preserved in oil, with a variety of nuts and seeds. In Thailand' where it is called ขขข khing, it is used to make a ginger garlic paste in cooking. In Indonesia, a beverage called wedang jahe is made from ginger and palm sugar. Indonesians also use ground ginger root, called jahe, as a common ingredient in local recipes. In Malaysia, ginger is called halia and used in many kinds of dishes, especially soups. Called luya in the Philippines, ginger is a common ingredient in local dishes and is brewed as a tea called salabat.[8][9] In Vietnam, the fresh leaves, finely chopped, can be added to shrimp-and-yam soup (canh khoai mỡ) as a top garnish and spice to add a much subtler flavor of ginger than the chopped root. In China, sliced or whole ginger root is often paired with savory dishes such as fish, and chopped ginger root is commonly paired with meat, when it is cooked. Candied ginger is sometimes a component of Chinese candy boxes, and a herbal tea can be prepared from ginger.

In the Caribbean, ginger is a popular spice for cooking and for making drinks such as sorrel, a drink made during the Christmas season. Jamaicans make ginger beer both as a carbonated beverage and also fresh in their homes. Ginger tea is often made from fresh ginger, as well as the famous regional specialty Jamaican ginger cake.

Freshly washed ginger

On the island of Corfu, Greece, a traditional drink called τσιτσιμπύρα (tsitsibira), a type of ginger beer, is made. The people of Corfu and the rest of the Ionian islands adopted the drink from the British, during the period of the United States of the Ionian Islands. In Arabic, ginger is called zanjabil and in some parts of the Middle East, gin �gayu (生姜湯). The Hebrew name for the spice, zangevil, is a variation on the name. In Western cuisine, ginger is traditionally used mainly in sweet foods such as ginger ale, gingerbread, ginger snaps, parkin, ginger biscuits, and speculaas. A gingerflavored liqueur called Canton is produced in Jarnac, France. Ginger wine is a ginger-flavored wine produced in the United Kingdom, traditionally sold in a green glass bottle. Ginger is also used as a spice added to hot coffee and tea. Ginger production, 2014

Country

Production (tonnes)

India

655,000

China

415,951

Nepal

276,150

Indonesia

266,145

Thailand

161,404

World

2,156,453

Source: Food and Agricultural Organization of the United Nations, Statistics Division (FAOSTAT)[10]

Similar ingredients Myoga (Zingiber mioga 'Roscoe') appears in Japanese cuisine; the flower buds are the part eaten. Another plant in the Zingiberaceae family, galangal, is used for similar purposes as ginger in Thai cuisine. Galangal is also called Thai ginger, fingerroot (Boesenbergia rotunda), Chinese ginger, or the Thai krachai. A dicotyledonous native species of eastern North America, Asarum canadense, is also known as "wild ginger", and its root has similar aromatic properties, but it is not related to true ginger. The plant contains aristolochic acid, a carcinogenic compound.[11] The United States Food and Drug Administration warns that consumption of aristolochic acid-containing products is associated with "permanent kidney damage, sometimes resulting in kidney failure that has required kidney dialysis or kidney transplantation. In addition, some patients have developed certain types of cancers, most often occurring in the urinary tract."[11]

Production

German Ginger wine with stem ginger decoration

In 2014, with a global production of 2.2 million tonnes of raw ginger, India accounted for 30% of the world total, followed by China (19%), Nepal (13%), Indonesia (12%), and Thailand (7%) (table).[10]

Nutritional information Ginger root (raw)

Ginger section

Nutritional value per 100 g (3.5 oz)

Energy

333 kJ (80 kcal)

Carbohydrates

17.77 g

Sugars

1.7 g

Dietary fiber

2g

Fat

0.75 g

Protein

1.82 g

Vitamins Thiamine (B 1)

(2%) 0.025 mg

Riboflavin (B 2)

(3%) 0.034 mg

Niacin (B 3)

(5%) 0.75 mg

Pantothenic acid (B 5)

(4%) 0.203 mg

Vitamin B6

(12%) 0.16 mg

Folate (B 9)

(3%)

11 μg Vitamin C

(6%) 5 mg

Vitamin E

(2%) 0.26 mg

Minerals Calcium

(2%) 16 mg

Iron

(5%) 0.6 mg

Magnesium

(12%) 43 mg

Manganese

(11%) 0.229 mg

Phosphorus

(5%) 34 mg

Potassium

(9%) 415 mg

Sodium

(1%) 13 mg

Zinc

(4%) 0.34 mg

Other constituents Water

79 g

Full Link to USDA Database entry



Units

μg = micrograms • mg = milligrams



IU = International units



Percentages are roughly approximated using US recommendations for adults. Source: USDA Nutrient Database

Raw ginger is composed of 79% water, 18% carbohydrates, 2% protein, and 1% fat (table). In 100 grams (a standard amount used to compare with other foods), raw ginger supplies 80 Calories and contains moderate amounts of vitamin B6 (12% of the Daily Value, DV) and the dietary minerals, magnesium (12% DV) and manganese (11% DV), but otherwise is low in nutrient content (table). When used as a spice powder in a common serving amount of one US tablespoon (5 grams), ground dried ginger (9% water) provides negligible content of essential nutrients, with the exception of manganese (70% DV).[12]

Composition and safety If consumed in reasonable quantities, ginger has few negative side effects.[13] It is on the FDA's "generally recognized as safe" list,[14] though it does interact with some medications, including the anticoagulant drug warfarin[15] and the cardiovascular drug, nifedipine.[16]

Chemistry The characteristic fragrance and flavor of ginger result from volatile oils that compose 1-3% of the weight of fresh ginger, primarily consisting of zingerone, shogaols and gingerols with [6]gingerol (1-[4'-hydroxy-3'-methoxyphenyl]-5-hydroxy-3-decanone) as the major pungent compound.[2][17] Zingerone is produced from gingerols during drying, having lower pungency and a spicy-sweet aroma.[17]

Biological effects Ginger has a sialagogue action, stimulating the production of saliva, which makes swallowing easier.[18]

Medicinal use and research The evidence that ginger helps alleviate chemotherapy-induced nausea and vomiting is inconclusive and it is not recommended for clinical use for this or for any type of nausea.[19] [20] Studies have found no clear evidence of harm from taking ginger during pregnancy, though its safety has not been established and it is a suspected risk for mutagenicity.[20] Allergic reactions to ginger generally result in a rash.[16] Although generally recognized as safe, ginger can cause heartburn and other side effects, particularly if taken in powdered form. [16] Unchewed fresh ginger may result in intestinal blockage, and individuals who have had ulcers, inflammatory bowel disease, or blocked intestines may react badly to large quantities of fresh ginger.[16] It can also adversely affect individuals with gallstones[2] and may interfere with the effects of anticoagulants, such as warfarin or aspirin.[2][16] Ginger is not effective for treating dysmenorrhea,[21] and there is no conclusive evidence for it having analgesic properties.[22] Ginger properties depend on a number of factors, such as cultivar, plant segment, and preparation method (dried or cooked). Examples:

1. Digestion

The phenolic compounds in ginger are known to help relieve gastrointestinal (GI) irritation, stimulate saliva and bile production, and suppress gastric contractions as food and fluids move through the GI tract. At the same time, ginger also appears to have beneficial effects on the enzymes trypsin and pancreatic lipase, and to increase motility through the digestive tract. This suggests ginger could help prevent colon cancer and constipation.

2. Nausea Chewing raw ginger or drinking ginger tea is a common home remedy for nausea during cancertreatment. Taking ginger for motion sickness seems to reduce feelings of nausea, but it does not appear to prevent vomiting. Ginger is safe to use during pregnancy, to relieve nausea. It is available in the form of ginger lozenges or candies.

3. Cold and flu relief During cold weather, drinking ginger tea is good way to keep warm. It is diaphoretic, which means that it promotes sweating, working to warm the body from within. To make ginger tea at home, slice 20 to 40 grams (g) of fresh ginger and steep it in a cup of hot water. Adding a slice of lemon or a drop of honey adds flavor and additional benefits, including vitamin C and antibacterial properties. This makes a soothing natural remedy for a cold or flu.

4. Pain reduction

A study involving 74 volunteers carried out at the University of Georgia found that daily ginger supplementation reduced exercise-induced muscle pain by 25 percent. Ginger has also been found to reduce the symptoms of dysmenorrhea, the severe pain that some women experience during a menstrual cycle.

5. Inflammation Ginger has been used for centuries to reduce inflammation and treat inflammatory conditions. A study published in Cancer Prevention Research journal reported that ginger supplements reduced the risk of colorectal cancer developing in the bowel of 20 volunteers. Ginger has also been found to be "modestly efficacious and reasonably safe" for treating inflammation associated with osteoarthritis.

6. Cardiovascular health Other possible uses include reducing cholesterol, lowering the risk of blood clotting, and helping to maintain healthy blood sugar levels. More research is needed, but if proven, ginger could become part of a treatment for heart disease and diabetes....


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