960 resultados para Runga-Kutta formulas.
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Remineralization of organic matter in reactive marine sediments releases nutrients and dissolved organic matter (DOM) into the ocean. Here we focused on the molecular-level characterization of DOM by high-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) in sediment pore waters and bottom waters from contrasting redox regimes in the northern Black Sea with particular emphasis on nitrogen-bearing compounds to derive an improved understanding of the molecular transformations involved in nitrogen release. The number of nitrogen-bearing molecules is generally higher in pore waters than in bottom waters. This suggests intensified degradation of nitrogen-bearing precursor molecules such as proteins in anoxic sediments: No significant difference was observed between sediments deposited under oxic vs anoxic conditions (average O/C ratios of 0.55) suggesting that the different organic matter quality induced by contrasting redox conditions does not impact protein diagenesis in the subseafloor. Compounds in the pore waters were on average larger, less oxygenated, and had a higher number of unsaturations. Applying a mathematical model, we could show that the assemblages of nitrogen-bearing molecular formulas are potential products of proteinaceous material that was transformed by the following reactions: (a) hydrolysis and deamination, both reducing the molecular size and nitrogen content of the products and intermediates; (b) oxidation and hydration of the intermediates; and (c) methylation and dehydration.
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Some recipes for home remedies on p. 37-39.
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Includes household hints; recipes for Norwegian, Swiss, Hungarian, Chinese, Spanish, German, Polish, Italian, English, and Mexican dishes; some recipes include wine or liquor as an ingredient. Sample recipes: Norwegian sweet soup, Shrimp salad, Maple Frango.
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[Division I. A to Cak] -- Division II. Cak to Cro -- Division III. Cro to Gri -- Division IV. Gri to Mus -- Division V. Mus to Pin -- Division VI. Pin to Ser -- Division VII. Sha to Tut -- Division VIII. Twe to Zwe.
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Includes index.
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Includes index.
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Includes index.
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Includes index.
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Publisher's advertisements on p. [1]-[12] (2nd group).
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Includes sections on household hints, etiquette, needlework, home remedies, medicinal plants, diseases in children, first aid, and cake baking. Sample recipes: Common twist or cough candy, Crullers, Rich bride cake.
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Includes index.
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Recipes for domestic wines, cider, etc., on p. 306-315.
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Advertisement for Fred. Lundberg Florist on p. [1] at end.
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"Domestic wines and liquors": p. 226-236.
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Advertisement for Fred. Lundberg Florist on p. [1] at end.