| 查看: 750 | 回复: 3 | ||
yayafan1680新虫 (正式写手)
|
[求助]
请改写下列四个句子，意思保持不变，谢谢！
|
|
1.For example, cadmium (Cd) is a non-essential heavy metal that is toxic to living cells at a very low concentration. 2. Phytoremediation, the application of green plants to remove pollutants from soils, has received increased attention in recent years, and may be better than conventional technologies for remediating contaminated soil. This plant-based technique has shown significant economic, aesthetic, and technical advantages compared with traditional techniques, which include immobilization, mechanical separation, electro-kinetic remediation, and chemical washing. 3.The roots were washed with tap water to remove soil particles, and immersed in 20 mM Na2-EDTA for 1 hour to remove exchangeable Cd. The shoots and roots were further washed three times with deionized water, then placed in an oven at 105℃ for 20 minutes, and then heated further at 70℃ until a constant weight was reached. 4.The bioconcentration factor (BCF) is defined as the ratio of the metal concentration in plant shoots to the concentration in the soil. The translocation factor (TF) is the ratio of metal concentration in plant shoots to the concentration in plant roots. BCF and TF are important indexes that indicate the plant’s ability to accumulate a particular metal from the soil . |
回复此楼» 猜你喜欢
带资进组求博导收留
已经有10人回复
-
最近几年招的学生写论文不引自己组发的文章
已经有11人回复
-
写了一篇“相变储能技术在冷库中应用”的论文，论文内容以实验为主，投什么期刊合适？
已经有4人回复
-
需要合成515-64-0，50g，能接单的留言
已经有3人回复
-
中科院杭州医学所招收博士生一名（生物分析化学、药物递送）
已经有3人回复
-
临港实验室与上科大联培博士招生1名
已经有8人回复
-
想换工作。大多数高校都是 评职称时 认可5年内在原单位取得的成果吗？
已经有4人回复
jnxybsf
金虫 (正式写手)
- 翻译EPI: 15
- 应助: 0 (幼儿园)
- 金币: 1305.4
- 散金: 73
- 红花: 4
- 沙发: 1
- 帖子: 582
- 在线: 81.8小时
- 虫号: 2042949
- 注册: 2012-10-04
- 专业: 元素化学
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
yayafan1680: 金币+20, ★有帮助 2016-07-22 23:08:04
爱与雨下: 金币+1 2016-07-23 20:52:35
yayafan1680: 金币+20, ★有帮助 2016-07-22 23:08:04
爱与雨下: 金币+1 2016-07-23 20:52:35
|
For example, cadmium is heavy metal, but the very low concentration is rarely toxtic to living cells. As the application of green plants to remove pollutants from soils, Phytoremediation has received increasing attention by great properties including immobilization, mechanical separation, electro-kinetic remediation and chemical washing in recent years. It may be better than conventional technologies in terms of remediating contaminated soil. Meanwhile, it presents significant economic, aesthetic and technical advantages compared to conventional methods. The roots were imersed in 20 mM Na2-EDTA for 1 hour to remove Cd through ion exchange process after washing off soil practicles by tap water. Furthermore, the shoots and roots were heated at 105 ℃ in an oven after washing by deionized water. Last, it needed to reach constant weight at 70℃. |
2楼2016-07-22 19:42:18
3楼2016-07-22 23:33:42
818james
铜虫 (著名写手)
- 翻译EPI: 140
- 应助: 59 (初中生)
- 金币: 7611.1
- 红花: 17
- 帖子: 1455
- 在线: 878.1小时
- 虫号: 3719023
- 注册: 2015-03-08
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
yayafan1680: 金币+20, ★★★★★最佳答案 2016-07-24 10:16:38
yayafan1680: 金币+20, ★★★★★最佳答案 2016-07-24 10:16:38
|
1. For example, cadmium (Cd) is a non-essential heavy metal that is toxic to living cells at a very low concentration Cadmium (Cd) is an example of heavy metal non-essential but toxic to living cells at a very low concentration. 2. Phytoremediation, the application of green plants to remove pollutants from soils, has received increased attention in recent years, and may be better than conventional technologies for remediating contaminated soil. This plant-based technique has shown significant economic, aesthetic, and technical advantages compared with traditional techniques, which include immobilization, mechanical separation, electro-kinetic remediation, and chemical washing. Recent years have seen Phytoremediation, the application of green plants to remove pollutants from soils receive increasing attention. It may be superior to conventional technologies for remediating contaminated soil. Significant economic, aesthetic, and technical advantages make this plant-based technique outshine traditional techniques, which include immobilization, mechanical separation, electro-kinetic remediation, and chemical washing. 3.The roots were washed with tap water to remove soil particles, and immersed in 20 mM Na2-EDTA for 1 hour to remove exchangeable Cd. The shoots and roots were further washed three times with deionized water, then placed in an oven at 105℃ for 20 minutes, and then heated further at 70℃ until a constant weight was reached. Rinse the roots in tap water to remove soil particles and dip them in 20 mM Na2-EDTA for 1 hour to remove exchangeable Cd. Further wash the shoots and roots three times with deionized water, then heat them in an oven first at 105℃ for 20 minutes, and later at 70℃ until gain a constant weight. 4.The bioconcentration factor (BCF) is defined as the ratio of the metal concentration in plant shoots to the concentration in the soil. The translocation factor (TF) is the ratio of metal concentration in plant shoots to the concentration in plant roots. BCF and TF are important indexes that indicate the plant’s ability to accumulate a particular metal from the soil . The bioconcentration factor (BCF) is the ratio of the metal concentration in plant shoots to the concentration in the soil while the translocation factor (TF) is the ratio of metal concentration in plant shoots to the concentration in plant roots, so BCF and TF are important indexes indicating the plant’s ability to accumulate a particular metal from the soil . |
4楼2016-07-24 09:10:25