When the infiltration ammonium concentration is high, the main factors are nitration of ammonium nitrogen by biological actions, dispersivity and permeability of the soil.

当入渗铵态氮浓度较大时，影响铵态氮迁移转化的显著因素是生物作用导致的铵态氮的硝化，以及土壤的渗透系数、弥散度等因素。

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Pig farm wastewater in high concentration of ammonia , ammonium ions and are free to the state of ammonia exist.

猪场废水中的氨氮浓度高，大多以铵离子和游离氨的状态存在。

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New tracer ammonium molybdate was used and samples with high or low concentration of molybdenum were analyzed by means of colorimetry and polarography.

采用新示踪剂钼酸铵，并对高、低不同浓度的钼样品进行比色法和示波极谱法分析。

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So by building up the concentration of ammonium ions inside its retaining membrane, H. pylori is able to fend off the destructive attentions of the hydrogen ions in stomach acid and thus live free from competition by less hardy germs.

ECONOMIST: Stomach turning | The