nitrogen

• Changes in sensory perception are the most sensitive indicators of the presence of nitrogen dioxide .
  感觉的改变是二氧化氮存在的最灵敏的标志。
• Since most textile wastes are deficient in nitrogen required for a balanced biological system .
  大多数纺织废水维持生化所需的氮素营养经常不足。
• Such blooms do not occur when nitrogen or phosphorus or both are present in very limited amounts .
  当氮或磷或两者存在数量很少时，不出现这种藻花。
• In some plants, a mild nitrogen deficiency at certain stages of development may be desirable .
  许多植物中，轻度缺氮在其发育的某些阶段可能是适宜的。
• One obvious remedy is to reduce emissions of sulfur and nitrogen oxides to the atmosphere .
  减少硫氧化物和氮氧化物向大气的排放量是一个有效的治理措施。
• Substitution of the number 8 carbon and the number 9 nitrogen also destroys activity as a cytokinin .
  取代第8位碳和第9位氮，也破坏作为细胞激动素的活性。
• Depletion of soil nitrogen frequently leads to reduced concentrations of soluble amino and amides .
  土壤氮素的减少常常导致可溶性氨基酸和酰胺浓度的降低。
• The oxides of nitrogen can have deleterious effects on materials, vegetation, and animal and human life .
  氮的氧化物对物质、植物、动物和人类生活有毒害效应。
• The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of an amino group .
  该染料的甲川链上的中位碳原子与氨基的氮原子相连。