| 1. | The soil is major natural resources which is indispensable to humanity , also , it is the vital component of environment and the basement of community
摘要当土壤砷含量达到一定浓度时，会对作物产生一定的毒害作用。 |
| 2. | The results showed obvious damage to the photosynthetic systems , protective enzyme systems and membrane systems by all the selected heavy metal ions
研究结果表明：各重金属离子均对水生植物的光合系统、保护酶系统、膜系统等具有明显的毒害作用。 |
| 3. | In this paper , signal peptide was added before the n - terminus of cema with the intention to reduce its toxic to plant cells while maintaining the strong antibacterial activity
本文通过在cema的n端添加信号肽，对其进行改造，以探索不降低抑菌作用的同时，降低其对植物细胞毒害作用的可能性。 |
| 4. | La3 + has greater ability of relieving the toxic effect of ni3 + to hydrocharis dubia b l . backer than that of ce3 + . however , the relif ability of rare earth to the stress of heavy metal was limited
在狐尾藻叶片细胞超微结构水平上也能见到cr ~ ( 6 + )的毒害作用在稀土元素la ~ ( 3 + )的作用下得到缓解。 |
| 5. | Abstract : a review with 10 references is given on the relationship between trace elements and the health of human body including the physological function of fe , the immunity function of se and the poisonous effect of pb
文摘:讨论了微量元素与人体健康的关系及其在体内的代谢平衡问题，包括:铁的生理功能、硒的免疫功能、铅的毒害作用。 |
| 6. | Plant defensin disrupts the cell membrane of phytopathogen differently from cema that contacts directly with the cell membrane . plant defensins are thought to interact with specific receptor harboring in the cell membrane
由于对真菌，特别是丝状真菌有很强的抑制作用，而对植物细胞没有毒害作用，防御素有望在植物抗病基因工程中得到广泛应用。 |
| 7. | The chances of heavy metal into the plant cell were reduced and stress alleviated . ultrastructural observation of leaf cells of myriophyllum verticillatum linn , showed that la3 + coule alleviate the injury of cell structure produced by cr6 +
对元素含量的测定表明，稀土元素降低了植物对重金属的富集量，两者表现出拮抗作用，减少重金属离子进入植物叶片细胞的机会，从而减轻了毒害作用。 |
| 8. | Many studies have been carried out on the toxicity of pollutants to aquatic animals , most of them are focused on the information of lethal concentrations , few have concerned the effects of sublethal concentration on the metabolism conditions
在污染物对于水生生物的毒害作用方面已经进行了大量的研究，但是大多为毒物致死浓度方面的报道，而关于在亚致死浓度时它们对于机体的生理影响却很少报道。 |
| 9. | The protein encoded by orf1 show strong homology with cation efflux family protein from geobacter sulfurreducens pca [ identities = 65 / 272 ( 23 % ) ] , and contains mmt1 - like putative conserved domains kog1485 , mmt1 contains conserved domains kog1485 is mitochondrial fe2 + transporter ( cation diffusion facilitator superfamily ) . so it can be considered that the protein encoded by o rf1 is fe2 + transporter involved in magnetosome biosynthesis in magnetospirillum gryphiswaldense msr - 1
经同源比较和保守性结构域分析，推测orf1编码的蛋白具有fe ~ ( 2 + )转运功能，在磁小体合成过程中将细胞质中fe ~ ( 2 + )转运到磁小体囊泡中，合成磁小体的同时去除fe ~ ( 2 + )对细胞的毒害作用。 |
| 10. | All results indicated that cd2 + had obvious harm to the enzymes . the endogenous protective system could be induced in refained degree under the press , however , which came to weakening along with the aggravation of cadmium , adding to extrinsic calcium could enhance the activities of sod and atpase properly , so protecting the damage of cadmium to the fish
镉对草鱼酶系统有明显的毒害作用，内源性保护系统的保护作用在受到胁迫后能够在一定限度内被诱导加强，但防御反应随着重金属离子毒害的加重而减弱，提高水中ca ~ ( 2 + )浓度能够适当增强体内酶的活性，对草鱼的镉毒性危害起保护作用。 |
