| 1. | Unfortunately, elemental analysis will not yield any information as to the extent of contamination by urea .
不幸的是，元素分析不能指出夹杂尿素的程度。 |
| 2. | Urea with carriers of high molecule materials
高分子载体控释尿素的研制 |
| 3. | Chemical analysis of urea for technical use . estimate of ash content
专业用尿素的化学分析.灰分测定 |
| 4. | Chemical analysis of urea for technical use . determination of alkalinity
专业用尿素的化学分析.碱度的测定 |
| 5. | Chemical analysis of urea for technical use . determination of total iron
专业用尿素的化学分析.总铁含量的测定 |
| 6. | Chemical analysis of urea for technical use . determination of buffer value
专业用尿素的化学分析.缓冲值的测定 |
| 7. | Products used in agriculture . fertilizers . chemical analysis of urea for agricultural use
农用产品.肥料.农用尿素的化学分析 |
| 8. | Study on nitrogen release rules of controlled release urea coated with membranes by dissolution and weight measurement method
以溶解称量法研究包膜控释尿素的氮素释放规律 |
| 9. | Meanwhile , the reaction theories of urea and compounding mechanisms of different superplasticizers were also discussed
同时还探讨了尿素的反应原理和减水剂的复合机理。 |
| 10. | L - arginine is a conditionally essential basic amino acid primarily involved in urea metabolism and excretion as well as dna synthesis
精氨酸是一种基础氨基酸，有助于尿素的新陈代谢和排泄。 |
