A simple method for calculating the standard formation heats of organic compounds containing nitrogen or sulfur by using of the group electronegativity is built up in this paper.
建立了用基团电负性计算含氮含硫有机物键裂能的简单方法，并且得到自由基标准生成热的计算方法。
Additionally the microorganisms must be supplied in the growth medium with nitrogen-containing compounds such as ammonium sulfate, ammonia, or urea, as well as with inorganic phosphates.
另外必须提供的微生物在与含氮如硫酸铵，氨水或尿素化合物生长介质，以及与无机磷酸盐。
Chlorosulfonyl isocyanate as an important intermediate was applied toward the syntheses of four to seven member heterocyclic compounds containing oxygen, nitrogen, sulfur atoms.
氯磺酰异氰酸酯可用于合成含氧、氮、硫等原子的四至七元杂环化合物。
Novel thio-substituted, nitrogen-containing, heterocyclic phosphonate compounds, pharmaceutical compositions, and methods of treating abnormal calcium and phosphate metabolism.
新的硫取代含氮杂环膦酸化合物，药物组合物，和治疗钙与磷酸盐异常代谢的方法。
A new stabilization additive was studied, it has good effect to improve the color change and sediments formation of FCC diesel fuel containing non-basic nitrogen compounds.
新研制的柴油安定性添加剂对抑制由非碱性化合物引起的催化裂化柴油的颜色变深和沉渣生成有较好的效果。
An asphalt-base crude is one containing a relatively high proportion of nonhydrocarbon constituents such as nitrogen, sulfur, and oxygen compounds.
沥青基原油含较高比例的非烃组分，如氮、硫、氧的化合物。
This article reviews the ring opening reaction of five membered nitrogen containing heterocyclic compounds.
综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。
Amine: Any of a class of nitrogen-containing organic compounds derived, either in principle or in practice, from ammonia (NH3).
胺：原则上或实际上是从氨(NH3)衍生的含氮有机化合物的总称。
The gas is also produced naturally when bacteria in the soil and oceans break down nitrogen-containing compounds.
土壤及海洋中的细菌分解含氮化合物时，也天然地产生这种气体。
The nitrogen poisoning mechanism of FCC catalysts and the catalytic conversion of nitrogen-containing compounds are summarized.
从FCC催化剂碱氮中毒机理、含氮化合物的转化等角度分析了含氮化合物对催化裂化的不利影响。
Nitrogen- and oxygen-containing heterocyclic compounds are crucial moieties in a wide range of drug leads.
氮、氧杂环化合物是一类非常重要的杂环分子，大多具有生物和药理活性。
Nitrogen- and oxygen-containing heterocyclic compounds are crucial moieties in a wide range of drug leads.
氮、氧杂环化合物是一类非常重要的杂环分子，大多具有生物和药理活性。
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