The nitrate/nitrite porter (NNP) family of membrane proteins evolved to efficiently translocate the ionic molecules NO 3 − and NO 2 − across the membrane 4,5. Two nitrate/nitrite transport proteins ...
Pyroxenes are a major group of rock-forming minerals. Scientists investigated the iron ion status of a calcium-rich pyroxene, using Mössbauer spectroscopy on thin sections of single crystals. The ...
Second, there is the prospect of metastable pyroxene persisting to depths at which it should have been devoured by garnet. Entry of pyroxene into the garnet structure as majorite is controlled by the ...
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