Cashew: Difference between revisions
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The '''cashew tree''' (''Anacardium occidentale'') is a tropical evergreen tree that produces the cashew seed and the cashew apple. |
The '''cashew tree''' (''Anacardium occidentale'') is a tropical evergreen tree that produces the cashew seed and the cashew apple. |
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Has been known to cause hepatitis C. - Kali G. K |
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It can grow as high as {{convert|14|m|ft}}, but the dwarf cashew, growing up to {{convert|6|m|ft}}, has proved more profitable, with earlier maturity and higher yields. |
It can grow as high as {{convert|14|m|ft}}, but the dwarf cashew, growing up to {{convert|6|m|ft}}, has proved more profitable, with earlier maturity and higher yields. |
Revision as of 16:26, 11 September 2015
Cashew | |
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Ripe cashew fruit | |
Scientific classification | |
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Species: | A. occidentale
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Binomial name | |
Anacardium occidentale |
The cashew tree (Anacardium occidentale) is a tropical evergreen tree that produces the cashew seed and the cashew apple.
Has been known to cause hepatitis C. - Kali G. K
It can grow as high as 14 metres (46 ft), but the dwarf cashew, growing up to 6 metres (20 ft), has proved more profitable, with earlier maturity and higher yields.
The cashew seed is served as a snack or used in recipes, like other nuts. The cashew apple is a light reddish to yellow fruit, whose pulp can be processed into a sweet, astringent fruit drink or distilled into liquor.
The shell of the cashew seed yields derivatives that can be used in many applications from lubricants to paints, and other parts of the tree have traditionally been used for snake-bites and other folk remedies.
Originally native to northeastern Brazil, the tree is now widely cultivated in Vietnam, Nigeria and India as major production countries.[1]
Etymology
Its English name derives from the Portuguese for the fruit of the cashew tree caju (Portuguese pronunciation: [kɐˈʒu]). Which itself is derived from the indigenous Tupian name acajú, literally meaning "nut that produces itself".[2] The name Anacardium, originally from the Greek, refers to the unusual location of the seed outside the core or heart of the fruit (ana means "without" and -cardium means "heart").
Habitat and growth
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Anacardium_occidentale_-_K%C3%B6hler%E2%80%93s_Medizinal-Pflanzen-010.jpg/170px-Anacardium_occidentale_-_K%C3%B6hler%E2%80%93s_Medizinal-Pflanzen-010.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Anacardium_occidentale_tree.jpg/220px-Anacardium_occidentale_tree.jpg)
The cashew tree is large and evergreen, growing to 10-12 m (~32 ft) tall, with a short, often irregularly shaped trunk. The leaves are spirally arranged, leathery textured, elliptic to obovate, 4 to 22 cm long and 2 to 15 cm broad, with smooth margins. The flowers are produced in a panicle or corymb up to 26 cm long; each flower is small, pale green at first, then turning reddish, with five slender, acute petals 7 to 15 mm long. The largest cashew tree in the world covers an area of about 7,500 square metres (81,000 sq ft); it is located in Natal, Rio Grande do Norte, Brazil.
The fruit of the cashew tree is an accessory fruit (sometimes called a pseudocarp or false fruit). What appears to be the fruit is an oval or pear-shaped structure, a hypocarpium, that develops from the pedicel and the receptacle of the cashew flower.[3] Called the cashew apple, better known in Central America as marañón, it ripens into a yellow and/or red structure about 5–11 cm long. It is edible, and has a strong "sweet" smell and a sweet taste. The pulp of the cashew apple is very juicy, but the skin is fragile, making it unsuitable for transport. In Latin America, a fruit drink is made from the cashew apple pulp which has a very refreshing taste and tropical flavor that can be described as having notes of mango, raw green pepper, and just a little hint of grapefruit-like citrus.
The true fruit of the cashew tree is a kidney or boxing-glove shaped drupe that grows at the end of the cashew apple. The drupe develops first on the tree, and then the pedicel expands to become the cashew apple. Within the true fruit is a single seed, the cashew nut. Although a nut in the culinary sense, in the botanical sense the nut of the cashew is a seed. The seed is surrounded by a double shell containing an allergenic phenolic resin, anacardic acid, a potent skin irritant chemically related to the better-known allergenic oil urushiol which is also a toxin found in the related poison ivy. Properly roasting cashews destroys the toxin, but it must be done outdoors as the smoke (not unlike that from burning poison ivy) contains urushiol droplets which can cause severe, sometimes life-threatening, reactions by irritating the lungs. People who are allergic to cashew (or poison ivy) urushiols may cross-react to mango or pistachio which are also in the Anacardiaceae family. Some people are allergic to cashew nuts, but cashews are a less frequent allergen than other nuts or peanuts.[4]
While the cashew plant is native to northeast Brazil, the Portuguese took it to Goa, India, between 1560 and 1565. From there it spread throughout Southeast Asia and eventually Africa.[5]
Cashew nut
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3c/CashewSnack.jpg/220px-CashewSnack.jpg)
Cashews are not actually nuts but seeds. They are a popular snack and food source. Cashews, unlike oily tree nuts, contain starch to about 10% of their weight. This makes them more effective than nuts in thickening water-based dishes such as soups, meat stews, and some Indian milk-based desserts. Many Southeast Asian cuisines use cashews for this unusual characteristic, rather than other nuts.[6]
The shell of the cashew nut is toxic, which is why the nut is never sold in the shell to consumers.[7]
Cashew nuts are commonly used in Indian cuisine, whole for garnishing sweets or curries, or ground into a paste that forms a base of sauces for curries (e.g., korma), or some sweets (e.g., kaju barfi). It is also used in powdered form in the preparation of several Indian sweets and desserts. In Goan cuisine, both roasted and raw kernels are used whole for making curries and sweets.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Cashew_-_sprout.jpg/220px-Cashew_-_sprout.jpg)
The cashew nut can also be harvested in its tender form, when the shell has not hardened and is green in color. The shell is soft and can be cut with a knife and the kernel extracted, but it is still corrosive at this stage, so gloves are required. The kernel can be soaked in turmeric water to get rid of the corrosive material before use. Cashew nuts are also used in Thai and Chinese cuisine, generally in whole form.
In the Philippines, cashew is a known product of Antipolo, and is eaten with suman. Pampanga also has a sweet dessert called turrones de casuy, which is cashew marzipan wrapped in white wafers.
In Indonesia, roasted and salted cashew nut is called kacang mete or kacang mede, while the cashew apple is called jambu monyet (literally means monkey rose apple).
In Mozambique, bolo polana is a cake prepared using powdered cashews and mashed potatoes as the main ingredients. This dessert is popular in South Africa, too.[8]
South American countries have developed their own specialties. In Brazil, the cashew fruit juice is popular all across the country. In Panama, the cashew fruit is cooked with water and sugar for a prolonged time to make a sweet, brown, paste-like dessert called dulce de marañón. Marañón is one of the Spanish names for cashew.
Production
Top 5 Countries for Production of Cashew Nuts (with shell) in 2013 | ||
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Country | Production MT (metric tons) | |
![]() |
1,110,800 | |
![]() |
950,000 | |
![]() |
753,000 | |
![]() |
450,000 | |
![]() |
180,000 | |
World Total | 4,439,960 | |
Source: Food & Agriculture Organization[1] |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Indonesia_cashews.jpg/220px-Indonesia_cashews.jpg)
Cashew nuts are produced in tropical countries because the tree is frost sensitive, adapting to various climatic regions between the latitudes of 25°N and 25°S.[9] The traditional cashew tree is tall (up to 14 m) and takes three years from planting before it starts production, and eight years before economic harvests can begin. More recent breeds, such as the dwarf cashew trees, are up to 6 m tall, and start producing after the first year, with economic yields after three years. The cashew nut yields for the traditional tree are about 0.25 metric tons per hectare, in contrast to over a ton per hectare for the dwarf variety. Grafting and other modern tree management technologies are used to further improve and sustain cashew nut yields in commercial orchards.[5]
In 2013, the world total for production of cashew nuts (in shells) was 4.4 million metric tons.[1] Vietnam was the world's largest individual producer in 2013 with 1.1 million tons.[1] As of 2014, rapid growth of cashew cultivation in Côte d'Ivoire made this country the top African producer with nearly 500,000 million tons.[10]
Fluctuations in world market prices, poor working conditions and low pay for local harvesting have caused discontent in the cashew nut industry.[11][12][13]
Nutrition
Nutritional value per 100 g (3.5 oz) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Energy | 553 kcal (2,310 kJ) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
30.19 g | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Starch | 0.74 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Sugars | 5.91 g 0.00 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dietary fiber | 3.3 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
43.85 g | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Saturated | 7.783 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Monounsaturated | 23.797 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Polyunsaturated | 7.845 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
18.22 g | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Other constituents | Quantity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Water | 5.20 g | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
†Percentages estimated using US recommendations for adults,[14] except for potassium, which is estimated based on expert recommendation from the National Academies.[15] |
In a 100 gram serving, raw cashews provide 553 calories, 67% of the Daily Value (DV) in total fats, 36% DV of protein, 13% DV of dietary fiber and 11% DV of carbohydrates (table).[16] Cashews are rich sources (> 19% DV) of dietary minerals, including particularly copper, manganese, phosphorus and magnesium (79-110% DV), and of thiamin, vitamin B6 and vitamin K (32-37% DV) (table).[16] Iron, potassium, zinc and selenium are present in significant content (14-61% DV) (table).[16] Cashews (100 grams, raw) contain 113 mg of beta-sitosterol.[16]
Allergy
For some 5% of people, cashews, like other tree nuts, can lead to complications or allergic reactions.[17][18][19] Cashews contain gastric and intestinal soluble oxalates, albeit less than some other tree nuts; people with a tendency to form kidney stones may need moderation and medical guidance.[20] Allergies to tree nuts such as cashews can be life-threatening or even fatal; prompt medical attention is necessary if tree nut allergy reaction is observed.[18] These allergies are triggered by the proteins found in tree nuts, and cooking often does not remove or change these proteins. Reactions to cashew and other tree nuts can also occur as a consequence of hidden nut ingredients or traces of nuts that may inadvertently be introduced during food processing, handling or manufacturing, particularly in Europe.[17][18]
Cashew oil
Cashew oil is a dark yellow oil for cooking or salad dressing pressed from cashew nuts (typically broken chunks created during processing). This may be produced from a single cold pressing.[21]
Cashew shell oil
Cashew nutshell liquid (CNSL) or cashew shell oil (CAS registry number 8007-24-7) is a natural resin with a yellowish sheen found in the honeycomb structure of the cashew nutshell, and is a byproduct of processing cashew nuts. It is a raw material of multiple uses in developing drugs, antioxidants, fungicides, etc. It is used in tropical folk medicine and for anti-termite treatment of timber.[22] Its composition varies depending on how it is processed.
- Cold, solvent extracted CNSL is mostly composed of anacardic acids (70%),[23] cardol (18%) and cardanol (5%).[24]
- Heating CNSL decarboxylates the anacardic acids, producing a technical grade of CNSL that is rich in cardanol. Distillation of this material gives distilled, technical CNSL containing 78% cardanol and 8% cardol (cardol has one more hydroxyl group than cardanol).[24] This process also reduces the degree of thermal polymerization of the unsaturated alkyl-phenols present in cashew nutshell liquid.
- Anacardic acid is also used in the chemical industry for the production of cardanol, which is used for resins, coatings, and frictional materials.[23][24]
These substances are skin allergens, like the oils of poison ivy, and present danger during manual cashew processing.[22]
This natural oil phenol has been found to have interesting chemical structural features which enable a range of chemical modifications to create a wide spectrum of bio-based monomers capitalizing on the chemically versatile construct, containing three different functional groups: the aromatic ring, the hydroxyl group and the double bonds in the flanking alkyl chain. These can be split into key groups, used as polyols, which have recently seen a dramatic increase in demand for their bio-based origin and key chemical attributes such as high reactivity, range of functionalities, reduction in blowing agents and naturally occurring fire retardant properties in the field of ridged polyurethanes aided by their inherent phenolic structure and larger number of reactive units per unit mass.
Cashew shell oil may be used as a resin for carbon composite products.[25] CNSL-based Novolac is another versatile industrial monomer deriving from cardanol typically used as a reticulating agent for epoxy matrices in composite applications providing good thermal and mechanical properties to the final composite material.
Cashew apple
This section needs additional citations for verification. (April 2013) |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Cashew_Brazil_fruit_3.png/170px-Cashew_Brazil_fruit_3.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/CashewApples2.jpg/220px-CashewApples2.jpg)
The cashew apple, also called cashew fruit, is the fleshy part of the cashew fruit that is attached to the cashew nut. The top end of the cashew apple is attached to the stem that comes off the tree. The bottom end of the cashew apple attaches to the cashew nut, which is encased in a shell. In botanical terms, the cashew apple is an accessory fruit that grows on the cashew seed (which is the nut).
The cashew apple is a soft fruit, rich in nutrients, and contains five times more vitamin C than an orange. It is eaten fresh, cooked in curries, or fermented into vinegar, as well as an alcoholic drink. It is also used to make preserves, chutneys, and jams in some countries such as India and Brazil. In many countries, particularly in South America, the cashew apple is used to flavor drinks, both alcoholic and nonalcoholic.
Cashew nuts are more popular than cashew apples in many parts of the world—regions that do not grow cashews—because the fruit, unlike the nut, is difficult to transport to these places. Unlike cashew nuts, cashew apples are extremely soft and easily bruised in shipment. For this reason, cashew juice and cashew juice concentrate are often shipped to these nonlocal countries instead of the fresh fruit.
Cashew apples have a sweet but astringent taste. This astringency has been traced to the waxy layer on the skin that contains a chemical, urushiol, which can cause minor skin irritation to areas that have had contact with it. It is almost identical to the astringency caused by the skin of a mango, which also contains urushiol. The astringency from mango skin can be mildly tasted in the flesh of mango fruit, just as the astringency of cashew apple skin can be mildly tasted in the flesh of cashew apples. In cultures that consume cashew apples, this astringency is sometimes removed by steaming the fruit for five minutes before washing it in cold water; alternatively, boiling the fruit in salt water for five minutes or soaking it in gelatin solution also reduces the astringency.[6][26]
Alcohol
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Young_cashew_nuts.jpg/220px-Young_cashew_nuts.jpg)
In Goa, the cashew apple (the accessory fruit) is mashed and the juice extracted and kept for fermentation for a few days. Fermented juice then undergoes a double distillation process. The resulting beverage is called feni or fenny. Feni is about 40-42% alcohol. The single-distilled version is called urrac, which is about 15% alcohol.
In the southern region of Mtwara, Tanzania, the cashew apple (bibo in Swahili) is dried and saved. Later it is reconstituted with water and fermented, then distilled to make a strong liquor often referred to by the generic name, gongo.
In Mozambique, cashew farmers commonly make a strong liquor from the cashew apple, agua ardente (burning water).
According to one source,[27] an alcohol had been distilled in the early 20th century from the juice of the fruit, and was manufactured in the West Indies.
See also
- Cajuina
- List of culinary nuts
- Semecarpus anacardium (the Oriental Anacardium) is a native of India and is closely related to the cashew.
References
- ^ a b c d "Major Food And Agricultural Commodities And Producers – Countries By Commodity". Fao.org. 2013. Retrieved 6 September 2015.
- ^ "Caju, identidade tropical que exala saúde — Embrapa". Embrapa.br. Retrieved 2012-12-22.
- ^ Varghese, T.; Pundir, Y. (1964). Anatomy of the pseudocarp in Anacardium occidentale L. Proceedings: Plant Sciences. 59(5): 252-258.
- ^ Rosen, T.; Fordice, D. B. (April 1994). "Cashew Nut Dermatitis". Southern Medical Journal. 87 (4): 543–546. doi:10.1097/00007611-199404000-00026. PMID 8153790. Retrieved 2011-01-13.
- ^ a b "Cajucultura historia (in Portuguese)". Retrieved February 2, 2010.
- ^ a b Harold McGee (2004). On food and cooking (See Nuts and Other Oil-rich Seeds chapter). Scribner. ISBN 978-0-684-80001-1.
- ^ "Glossary C-G". www.joyofbaking.com. iFood Media LLC. Archived from the original on 2014-03-27.
- ^ Phillippa Cheifitz (2009). South Africa Eats.
- ^ "Cultivating Cashew Nuts". ARC-Institute for Tropical and Subtropical Crops, South Africa. Retrieved February 15, 2015.
- ^ Bavier, Joe (29 October 2014). "War-scarred Ivory Coast aims to conquer the world of cashews". Reuters. Retrieved 9 February 2015.
- ^ "Tanzania riots over cashew nut payments". BBC. 24 April 2013. Retrieved 14 May 2013.
- ^ Lamble L (2 November 2013). "Cashew nut workers suffer 'appalling' conditions as global slump dents profits". The Guardian. Retrieved 6 September 2015.
- ^ Wilson B (4 May 2015). "'Blood cashews': the toxic truth about your favourite nut". The Telegraph. Retrieved 6 September 2015.
- ^ United States Food and Drug Administration (2024). "Daily Value on the Nutrition and Supplement Facts Labels". FDA. Archived from the original on 2024-03-27. Retrieved 2024-03-28.
- ^ National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Food and Nutrition Board; Committee to Review the Dietary Reference Intakes for Sodium and Potassium (2019). Oria, Maria; Harrison, Meghan; Stallings, Virginia A. (eds.). Dietary Reference Intakes for Sodium and Potassium. The National Academies Collection: Reports funded by National Institutes of Health. Washington, DC: National Academies Press (US). ISBN 978-0-309-48834-1. PMID 30844154. Archived from the original on 2024-05-09. Retrieved 2024-06-21.
- ^ a b c d "Full Report (All Nutrients): 12087, Nuts, cashew nuts, raw, database version SR 27". Agricultural Research Service – United States Department of Agriculture. 2015. Retrieved 6 August 2015.
- ^ a b "The prevalence of tree nut allergy: a systematic review". Curr Allergy Asthma Rep. 15 (9): 555. 2015. doi:10.1007/s11882-015-0555-8. PMID 26233427.
{{cite journal}}
: Cite uses deprecated parameter|authors=
(help) - ^ a b c "Cashew Allergies". Informall Database – funded by European Union. 2010.
- ^ "Food Allergies – INFOSAN" (PDF). World Health Organization. 2006.
- ^ Rittera; et al. (May 2007). "Soluble and insoluble oxalate content of nuts". Journal of Food Composition and Analysis. 20 (3–4): 169–174. doi:10.1016/j.jfca.2006.12.001.
- ^ "Cashew Oil". Smart Kitchen. Retrieved February 15, 2015.
- ^ a b "World Agriculture and the Environment", by Jason W. Clay, p.268
- ^ a b Alexander H. Tullo (September 8, 2008). "A Nutty Chemical". Chemical and Engineering News. 86 (36): 26–27. doi:10.1021/cen-v086n033.p026.
- ^ a b c "Exposure and Use Data for Cashew Nut Shell Liquid" (PDF). United States Environmental Protection Agency. Retrieved 2012-01-12.
- ^ Ferri, Enrico (22 May 2011). "Bioresins Derived from Cashew Nutshell Oil". MaterialsToday. Retrieved 7 September 2011.
- ^ Azam-Ali and Judge (2004). Small-scale cashew nut processing. FAO, United Nations.
- ^ Percival, Robert (1803). An Account of the Island of Ceylon: Its History, Geography , Natural History, with the Manners and Customs of its various Inhabitants. London: C. & R. Baldwin. Retrieved 9 February 2015.
Further reading
- Klaus von Freyhold: The cashew sector in Ghana, in: Hans-Heinrich Bass (Hrsg.): Promoting the Production of Cashew, Shea, and Indigenous Fruits in West Africa, ITD Annual Report Supplement 2, 2013, pp. 13–18
- Morton, Julia F. Fruits of Warm Temperatures. ISBN 978-0-9610184-1-2 [1]. Cashew Apple. pp. 239–240.[2]
- Pillai, Rajmohan and Santha, P. The World Cashew Industry (Rajan Pillai Foundation, Kollam, 2008).nm.
- Morton, J. F. (2003). "Cashew nuts and cashew apples". Encyclopedia of Food Sciences and Nutrition. pp. 958–964. doi:10.1016/B0-12-227055-X/00180-2. ISBN 9780122270550.
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- Allergenic foods
- Anacardiaceae
- Crops originating from Brazil
- Crops originating from South America
- Edible nuts and seeds
- Flora of the Cerrado
- Foods requiring detoxification
- Medicinal plants of South America
- Plants described in 1753
- Resins
- Trees of Brazil
- Trees of Colombia
- Trees of French Guiana
- Trees of Guyana
- Trees of Suriname
- Trees of Venezuela
- Tropical agriculture
- Vegetable oils