re forms [ re-form ]的第三人称单数 D forms 【医】 侏儒型, 侏儒菌落 nitrogen burst 氮爆搅动 nitrogen hardening 渗氮硬化 nitrogen lag 氮迟滞 amino nitrogen 【医】 氨基氮 nitrogen absorption 氮吸附 最新单词 general theory of statistics的中文意思 统计学原理 general theory of relativity...
ORGANIC FORMS OF SOIL NITROGEN. IN: WILEY JOHN, EDITOR. HUMIC CHEMISTRY: GENESIS, COMPOSITION, REACTION. NEW YORK: 1994. PP. 59-95.OLK, C. O. Organic Forms of Soil Nitrogen. In: SCHEPERS, J. S.; RAUN, W. R. Nitrogen in Agricultural Systems. Madison, USA, American Society of ...
Organic farming, agricultural system that uses ecologically based pest controls and biological fertilizers derived largely from animal wastes and nitrogen-fixing cover crops. The ecological benefits of organic farming are counterbalanced by higher food c
Reversible adsorption of nitrogen dioxide within a robust porous metal–organic framework High and reversible nitrogen dioxide (NO2) uptake, and low-concentration NO2removal from gas mixtures, is observed in a metal–organic framework. The NO2is bound within the pores by cooperative supramolecular in...
Nitrenes are compounds featuring a monovalent nitrogen atom, and they are typically formed as transient intermediates in organic synthesis. They have been the subject of matrix studies for decades, but their stabilization remains challenging. Now, two independent works report the isolation of triplet ar...
Aza-Michael addition (path b),4 SN2 displacement of C–X bonds with nitrogen nucleophiles (path c), transition-metal-catalyzed allylic (path d),5 and propargylic (path e)6 substitutions with amines, and electrophilic amination of C–M bonds (path f) or α C–H bonds of carbonyl ...
It derives its name from the fact that in the 19th century most of the carbon compounds then known were considered to have originated in living organisms. When combined with variable amounts of hydrogen, oxygen, nitrogen, sulfur, phosphorus, or other elements, the structural possibilities of ...
and thermal stability. MOFs are a wide family of crystalline porous materials. MOFs are generated from clusters or metal ions that are coordinated by oxygen ornitrogen atoms. A substantial variety of novel MOF structures are created each year, which suggests that they may be suited for particular...
2c). Moreover, solid-state 15N CP/MAS NMR spectroscopy revealed that CS-COF consists of nitrogen atoms that appear at δ=–67.6 p.p.m., which corresponds to the nitrogens of phenazine and has an S/N ratio similar to that of the reported sample (Fig. 2c)59. Field-emission ...
(for CO2/CH4or CO2/N2) and a CO2permeance of over 1000 GPU can reduce the cost of CO2capture to 20–30 US$/ton13. MOFs can be processed in the form of mixed matrix membranes (MMMs) or pure MOF membranes for gas separations. Many MOF-based MMMs have shown good separation performance...