Kodi nyama yankhumba Yofiira?

Zamkati

• Choyera kapena chofiira?
• Gulu lazasayansi
• Gulu lachikulire
• Zotsatira zathanzi la nyama yofiira yophika
• Mfundo yofunika

Bacon ndi chakudya cham'mawa chomwe chimakonda padziko lonse lapansi.

Izi zati, pali chisokonezo chachikulu kuzungulira nyama yake yofiira kapena yoyera.

Izi ndichifukwa choti asayansi, amadziwika kuti ndi nyama yofiira, pomwe imaganiziridwa ngati nyama yoyera m'njira zophikira. Kuphatikiza apo, ndi nyama yopangidwa, yomwe imatha kuyambitsa kukayikira kwake.

Nkhaniyi ikuwunikanso magawo osiyanasiyana a nyama yankhumba komanso ngati ikhoza kukhala yowonjezeranso zakudya zanu.

Choyera kapena chofiira?

Pankhani yosiyanitsa pakati pa nyama yoyera ndi yofiira, pali chinthu chimodzi chachikulu chomwe chimaganiziridwa: zomwe zili myoglobin.

Myoglobin ndi mapuloteni omwe amachititsa kuti mpweya ukhale ndi minofu. Amapereka nyama zina zakuda, zofiira ().

Ngati nyama yopatsidwa ili ndi myoglobin wochuluka kuposa nyama yoyera, monga nkhuku (kupatula miyendo ndi ntchafu) ndi nsomba, imadziwika kuti ndi nyama yofiira (2, 3).

Mtundu wa nyama umasiyananso ndi msinkhu, nyama zakale zimakhala ndi mtundu wakuda pang'ono (4).

Pomaliza, minofu yomwe imagwiritsidwa ntchito kwambiri imawonetsa mtundu wakuda, monga miyendo ya nkhuku ndi ntchafu.

Myoglobin ndi mapuloteni omwe amapezeka munyama zina zomwe zimapatsa nyama zofiira mtundu wawo wakuda.

Gulu lazasayansi

Potengera kapangidwe ka zakudya kapena sayansi ya nyama yankhumba, imadziwika kuti ndi nyama yofiira - monganso zinthu zonse za nkhumba (3).

Izi ndichifukwa cha mtundu wake wapinki kapena wofiira, gulu monga "ziweto," komanso myoglobin wapamwamba kwambiri asanaphike.

Izi zikusemphana ndi mawu otsatsa otsiriza a 1980 omwe adalengeza nyama ya nkhumba ngati "nyama yoyera ina" kuwonetsa ngati nyama yowonda m'malo mwa nkhuku (5).

Izi zati, myoglobin imasiyanasiyana kutengera mtundu wina wa nyama.

Zakudya zopatsa thanzi komanso zasayansi, nyama yankhumba ndi zinthu zonse za nkhumba zimawerengedwa kuti ndi nyama zofiira chifukwa cha pinki kapena mtundu wofiyira musanaphike.

Gulu lachikulire

Zikafika pagulu lophikira la nyama ya nkhumba, nthawi zambiri amawonedwa ngati nyama yoyera chifukwa cha utoto wawo akamaphika.

Nyama yankhumba ikhoza kukhala yosiyana, monga ophika ambiri amawona ngati nyama yofiira chifukwa cha mtundu wake wofiira akamaphika.

Matanthauzidwe amakulidwe a nyama yofiira kapena yoyera sanakhazikike mu sayansi, chifukwa chake itha kukhala nkhani yamaganizidwe.

Mukamafotokozera nyama yofiira m'malo ophikira, mtundu wa nyama umagwiritsidwa ntchito mosiyana ndi kuchuluka kwa myoglobin yomwe nyama imakhalamo.

Nthawi zophikira, nkhumba nthawi zambiri imadziwika kuti ndi yoyera chifukwa chakuphika kwake, ngakhale ena angaganize kuti nyama yankhumba ndi nyama yofiira.

Zotsatira zathanzi la nyama yofiira yophika

Kuphatikiza pakuwonedwa ngati nyama yofiira mopatsa thanzi komanso mwasayansi, nyama yankhumba imagwera m'gulu lanyama yofiira.

Izi ndi nyama zilizonse zotetezedwa ndi kusuta, kuchiritsa, kuthira mchere mchere, kapena kuwonjezera zoteteza ku mankhwala (6).

Zakudya zina zofiira zopangidwa ndi masoseji, salami, agalu otentha, kapena ham.

Pali kusiyana kwakukulu pakati pa nyama zofiira zosinthidwa ndi nyama zofiira zosasinthidwa, monga ng'ombe, mwanawankhosa, ndi nkhumba.

Kudya nyama yofiira kwambiri kwakhala kukuwonjezeka ndi chiwopsezo chowonjezeka cha matenda osachiritsika angapo, kuphatikiza matenda amtima, mtundu wa 2 shuga, ndi khansa zina, komanso chiopsezo chachikulu chaimfa (6,).

Izi zati, pali makampani ambiri omwe akupanga nyama zosakonzedwa pang'ono, zosasungunuka.

Ponseponse, ndibwino kuwonetsa kudziletsa pokhudzana ndi kudya nyama zofiira zosinthidwa, kuchepetsa kumwa kawiri pamlungu kapena kuchepera.

Zakudya zofiira monga nyama yankhumba zawonetsedwa kuti zimakhala ndi zovuta m'thupi mukamawonjezera. Ndibwino kuti muchepetse kudya kwanu osapitilira kawiri pa sabata.

Mfundo yofunika

Myoglobin ndizomwe zimatsimikizira kuti nyama ndi yofiira kapena yoyera.

Mwasayansi, nyama yankhumba imadziwika kuti ndi nyama yofiira, ngakhale m'njira zophikira imatha kuonedwa ngati nyama yoyera.

Bacon imagwera m'gulu lanyama yofiira, yomwe imalumikizidwa ndi chiwopsezo chowonjezeka cha matenda ena akawonongedwa. Chifukwa chake, kudziletsa ndikofunikira.

Ponseponse, ngakhale mutawona ngati nyama yofiira kapena yoyera, nyama yankhumba ilipo.