منابع مشابه
A salty route to an all-nitrogen ring.
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متن کاملMicrodetermination of protein nitrogen with a dumbbell diffusion apparatus.
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Biological dinitrogen fixation (BNF) represents a major input of reduced nitrogen (N) to the oceans. Accurate direct measurements of BNF rates are crucial for reliably determining the biogeochemical significance of diazotrophy at local and global scales. Traditionally, borosilicate glass fiber filters (GF/F, Whatman) with a nominal pore size of 0.7μm are used to collect suspended particles by f...
متن کاملSintering in Nitrogen Atmosphere of Iron-Rich Glass-Ceramics
The sintering and the crystallization of two iron-rich glass compositions (45–75m powder fractions) were studied in air and nitrogen atmospheres. The phase formation was evaluated by differential thermal analysis, while the densification, by dilatometry; the crystalline phases were identified by X-ray diffraction and the structure observed by scanning electron microscopy. It was highlighted tha...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1919
ISSN: 0026-6493
DOI: 10.2307/2990095