https://en.wikipedia.org/wiki/Kangina Jump to content [ ] Main menu Main menu move to sidebar hide Navigation * Main page * Contents * Current events * Random article * About Wikipedia * Contact us Contribute * Help * Learn to edit * Community portal * Recent changes * Upload file * Special pages [enwiki] Wikipedia The Free Encyclopedia Search [ ] Search [ ] Appearance * Donate * Create account * Log in [ ] Personal tools * Donate * Create account * Log in Contents move to sidebar hide * (Top) * 1 Notes * 2 References [ ] Toggle the table of contents Kangina [ ] 10 languages * asmiiyyaa * Deutsch * Espanol * frsy * knndd * Makedonski * pStw * Portugues * Slovenscina * Turkce Edit links * Article * Talk [ ] English * Read * Edit * View history [ ] Tools Tools move to sidebar hide Actions * Read * Edit * View history General * What links here * Related changes * Upload file * Permanent link * Page information * Cite this page * Get shortened URL Print/export * Download as PDF * Printable version In other projects * Wikimedia Commons * Wikidata item Appearance move to sidebar hide From Wikipedia, the free encyclopedia Afghan mud-straw containers for preserving grapes [330px-Kangina]A paper-lined kangina, opened to access the grapes stored inside Kangina (Dari^[a]: khngynh, lit. 'treasure'),^[1]^[2] also called Gangina, is the traditional Afghan technique of preserving fresh fruit, particularly grapes, in airtight discs formed from mud and straw. The centuries-old technique is indigenous to Afghanistan's rural center and north, where remote communities that cannot import fresh fruit eat kangina-preserved fresh grapes throughout the winter, and merchants use kangina to safely store and transport grapes for sale at market.^[2] Grapes preserved using kangina in modern Afghanistan are typically of the thick-skinned Taifi or Kishmishi varieties,^[1] which are harvested later in the season and remain fresh in the mud vessels for up to six months.^[3] Video of a kangina being opened The method, a form of passive controlled-atmosphere storage, works by sealing fruit in the clay-rich mud, restricting flow of air, moisture and microbes, much as a plastic bag would. Discs are formed from two bowl-shaped pieces, which are sculpted from mud and straw, and baked in the sun before being filled with up to 1-2 kilograms (2.2-4.4 lb) of un-bruised fruit^[2] and sealed with more mud. They are kept dry and cool, away from direct sunlight.^[3] Gradual permeation of gas through the clay barrier allows oxygen to enter the container, keeping the grapes alive, while the elevated concentration of carbon dioxide inside the package inhibits the grapes' metabolism and prevents the growth of fungus. The grapes are prevented from drying out, and the mud absorbs liquid which would otherwise lead to bacterial and fungal growth.^[4] The practice of storing grapes in mud and straw has been recorded as far back as the 12th century: in his Book of Agriculture, Sevillan agronomist Ibn al-'Awwam noted layering grapes with straw in mud-sealed glass containers or "cowpat bowls" as an extant technique of preservation in Andalusia.^[5] Kangina are inexpensive, eco-friendly, and effective vessels for the preservation of fresh fruit.^[2] A 2023 study found kangina and polystyrene foam boxes to be the most effective vessels for preserving grapes.^[2] The containers are, however, heavy, unwieldy, and prone to absorbing moisture.^[2]^[6] Notes [edit] 1. ^ Dari pronunciation: [kkaNG.gi:.na] References [edit] 1. ^ ^a ^b "khngynh; nghdry ngwr bh gwnh snty | MAIL". mail.gov.af. Retrieved 2023-12-06. 2. ^ ^a ^b ^c ^d ^e ^f Hejazi, Ziaurrahman; Nawakht, Noor Agha; Hedayat, Yar Mohammad; Giordani, Edgardo (2023-03-01). "Styrofoam Packaging as Alternative of the Afghan Traditional "Gangina" Container to Extend Quality of 'Taifi' Grapes in Room Temperature Storage". Journal of Packaging Technology and Research. 7 (1): 35-41. doi:10.1007/s41783-022-00148-1. ISSN 2520-1042. S2CID 255079194. 3. ^ ^a ^b Glinski, Stefanie (2021-03-25). "The Ancient Method That Keeps Afghanistan's Grapes Fresh All Winter". Atlas Obscura. Retrieved 2023-12-06. 4. ^ "Watch: This Is How Grapes Are Preserved In Clay Pots In Afghanistan". IndiaTimes. 2022-04-19. Retrieved 2023-12-06. 5. ^ Cabo-Gonzalez, Ana M. (2014). "The Study of the Evolution of Fruit Preservation Techniques in the Iberian Peninsula through the Agronomic Andalusian Works, their Roman Antecedents and Posterior Footprint in the Renaissance". Arabic Sciences and Philosophy. 24 (1): 139-168. doi:10.1017/S095742391300012X. ISSN 0957-4239. 6. ^ Royal Afghan Embassy (1955). This is Afghanistan. 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