Sirika
Sirika (ku Chingezi: silk) idondo remarise rinogadzirwa ne chigwerekwete kana chisakafuriro chehonye resirika.
Marise esirika akasimba kwazvo uye anoshandiswa kugadzira hembe.
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Jira re sirika rinogona kugadzirwa kuita ragi, wariro (bedding), kana inogona kushandiswa kunyora kunyora kana kupenda. Kudhara, sirika yaishandiswa kugadzira maparashuti. Tsika yeku kudza mahonye esirika ekugadzirisa sirika inonzi tsikayeseri (sericulture).
Madzvatsvatsva mazhinji ane dondo remarise anonzi wo sirika.
Nhoroondo
Chayina yakasika hembe ye sirika muna 3000 B.C. ne kutengeza pasirose ne nzira ye sirika nekuti yaive yakakosha uye ichidhura. Machayina ndivo vega vabaritsa nekutenga sirika pasirorse kuzvika muna 533 CE.
Puropati ye chemishonga
Sirika inogadzirwa ne honye ye sirika ine zvivakanyama, serisini (sericin) ne riseini kaka fibhurosini (fibroin).
Riseini is structural center ye sirika uye inoipa husimba. Inogadzirwa ne maamino asidhi, iyo inogadzira marise akasimba uye anotadzika kumhedura. Husimba we tenziri (tensile strength) uripo nekuda kwe sungo ye sikamanzi. Pano tandavadzwa sirika, pane fosi yakasimba pamasungo[rabva kuchisungo], saka haamhedurike.
Serisini imetiriyau ino nama saka poteredza risesini uye inoi protecta kunze. Sirika inodzinda michegwa ye asidhi yakawanda, zvichisiyana nesarufa asihi yainonyeutsa. Pfundiro (perspiration) inopa sirika ruvara runoita se huroro.
Mamwe mapeji ekutarisa
- Nzira ye sirika
- Donje
- Jira
- Nduko
- Nguwo
- Rukangadza
- Kusona
Mabviro eruzivo
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