Water vapor in the air combines with nitrogen and forms nitric acid.
水汽在空气中用氮和表格氮的酸联合。
NITRIC ACID FOR INDUSTRIAL USE. DETERMINATION OF AMMONIACAL NITROGEN CONTENT. SPECTROPHOTOMETRIC METHOD.
化学产品。工业硝酸。氨氮含量的测定
The Effect on the Accumulation and Yield of Nitric Nitrogen to the Green Leaf Vegetable Produced by Nitrogen
施氮量对绿叶蔬菜硝态氮的累积和产量的影响
The changes of contents of creatinine，blood urea nitrogen，lactic acid and nitric oxide in the blood were measured.
检测血中肌酐，尿素氮，乳酸及一氧化氮含量
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