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Arrautza-oskol

Hegazti baten apurtutako arrautza-oskola

Arrautza-oskola arrautza baten kanpoko alde gogorra da, baita kanpoko zati ez-gogorrak dituzten beste arrautza batzuk izendatzeko ere,[1] hala nola arrainen arrautzakoak. Tratamendu kimiko baten ondoren bakarrik irensten den zati jangarri bat da; adibidez, ozpindutako arrautzen oskolak bigundu dituen ingurune azido batean (ozpina) eragiten duelako jan ahal izaten dira. Oskola arrautza baten pisu osoaren % 10 eta % 15 artekoa da.

Ezaugarriak

Arrautza-oskol baten egitura materiala espezieen arabera aldatu egiten da, esan daiteke kristal mineralekin lerrokatutako proteina matrize bat dela, oro har kaltzio karbonatoa bezalako konposatu kimikoetan dagoen kaltzioa (% 94a). Arrautzen kaltzioa sedimentazio batetik dator; hegaztietan ez dago zelularik oskolaren kaltzioa sortzen duenik. Oskol gogorragoa duten arrautzak mineralizatuago daude oskolekoa ahulagoa edo hauskorragoa dutenak baino.

Erreferentziak

  1. Kilner, R. M.. (2006). «The evolution of egg colour and patterning in birds» Biological Reviews 81 (3): 383–406.  doi:10.1017/S1464793106007044. PMID 16740199..

Kanpo estekak


Gastronomia Artikulu hau gastronomiari buruzko zirriborroa da. Wikipedia lagun dezakezu edukia osatuz.
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Arrautza-oskol
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