| 1. | Determination of urea determination of total nitrogen content
总氮含量的测定 |
| 2. | Determination of urea - determination of total nitrogen content
尿素测定方法总氮含量的测定 |
| 3. | Determination of total nitrogen content for organic - inorganic compound fertilizers
有机-无机复混肥料中总氮含量的测定 |
| 4. | Study on the determination of amide nitrogen and total nitrogen in urea nitrate
硝酸脲中酰胺态氮及总氮含量测定的研究 |
| 5. | Lubricating oils and fuel oils - determination of total nitrogen - modified kjeldahl method
润滑油及燃料油中总氮含量测定法 |
| 6. | Standard test method for total nitrogen in organic materials by modified kjeldahl method
用改进的基耶达法测定有机化合物中总氮含量的试验方法 |
| 7. | Soil quality - determination of total nitrogen content by dry combustion " elemental analysis " iso 13878 : 1998
土壤质量.用干燃烧法测定总氮含量 |
| 8. | The activity of alkaline phosphatase was significantly correlated to the particle size and dissolved inorganic phosphorus negatively but opposite to organic matters and total nitrogen
通过直线回归分析发现，碱性磷酸酶活性与沉积物中粒径、溶解无机磷含量呈显著负相关，与总磷、有机质、总氮含量呈显著正相关。 |
| 9. | For the relationships between zoobenthos and environmental factors , results showed that zoobenthic standing crops were positively correlated with submersed aquatic macrophytes , total phosphorus and total nitrogen contents but were negatively correlated with depths and secchi disk transparencies
环境分析表明底栖动物总的现存量与水草生物量、总磷总氮含量均正相关，与水深、透明度均负相关。 |
| 10. | The results suggested that organic matter and total nitrogen could increase the activity of alkaline phosphatase , and that the activity of alkaline phosphatase was activated or inhibited by substrate and product due to co - existence . this mechanism was reported poorly in the wetland sediments or soils
说明有机质总氮含量是提高碱性磷酸酶活性的重要因素，同时反映出碱性磷酸酶活性受底物和产物并存机制的诱导或抑制，这种并存机制在其它土壤或沉积物碱性磷酸酶的研究中并不多见。 |
