游隼蛋中发现新污染物-凯发k8官网

游隼蛋中发现新污染物
文章来源:未知 文章作者:enread 发布时间:2011-04-19 03:22 字体: [ ] 
(单词翻译:双击或拖选)

flame retardants(阻燃剂) are chemical compounds added to 1 and plastics to keep them from burning easily, but these can be 2. now a team of researchers from spain and canada has detected some of these emerging 3 for the first time in peregrine 4 (falco peregrinus) eggs in both countries. "the presence of 'dechlorane plus' and other related, chlorinated compounds used as flame retardants have been detected for the first time in the european 5 (flora and 6 of the region)", explains ethel eljarrat, co-author of the study and scientist at the institute of environmental 7 and water studies (idaea-csic, spain).

the researchers have found these substances in peregrine falcon (falco peregrinus) eggs in both spain and canada. the flame retardants are often added to textiles, electronic circuits and other products to 8 or resist the spread of fire, but can be transferred to the environment.

in nature these compounds are "bioaccumulating and bioconcentrating" all along the food chain, as evidenced by the research published in the environmental science & technology journal. the international research team for this study was led by begoña jiménez of the institute of organic chemistry (csic, spain), and environment canada researchers, kim fernie and mehran alaee.

having received the relevant permits, eggs that had failed to hatch from various active falcon nests in canada and spain, were collected. the collection involved 13 eggs from spain (five in guadalajara – a territory representative of an inland habitat of the iberian peninsula - and eight in bilbao - representing a 9 environment), and 12 eggs from canada (great lakes region and eastern provinces).

the levels of some of the measured contaminants have been found to be somewhat higher in bilbao than in guadalajara, and the authors believe this may be due 10 to the difference in the 11' diet: more 12(水生的) in the former and more terrestrial(地球的,陆地的) in the latter. in fact, if fish is highly contaminated, peregrines would accumulate more of the harmful substances. while peregrine falcons do not eat fish, they 13 upon other birds, some of which may eat fish.

selecting the peregrine falcon(游隼) was no accident. this species was endangered in many areas of the northern hemisphere due to the use of organochlorinated 14, particularly ddt, though when this was prohibited in the 1970s the populations recovered. furthermore, falcons are at the top end of the food chain and accumulate substances carried by their prey.



点击收听单词发音收听单词发音  

1 678996eb9c1fa810d3b0cecef6c792b4     
织物( fabric的名词复数 ); 布; 构造; (建筑物的)结构(如墙、地面、屋顶):质地
参考例句:
  • cotton fabrics and synthetics 棉织物与合成织物
  • the fabrics are merchandised through a network of dealers. 通过经销网点销售纺织品。
2 inswc     
adj.有毒的,因中毒引起的
参考例句:
  • the factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
  • there is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
3 694861490fe64672170a0da250a277c7     
污染物质(尤指工业废物)( pollutant的名词复数 )
参考例句:
  • pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
  • the 1987 amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条(g)的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法
4 rhczo     
n.隼,猎鹰
参考例句:
  • the falcon was twice his size with pouted feathers.鹰张开羽毛比两只鹰还大。
  • the boys went hunting with their falcon.男孩子们带着猎鹰出去打猎了。
5 nyvzzh     
n.生物区
参考例句:
  • they have had serious effects upon the biota of stream.它们对河流中的生物群体产生严重影响。
  • historical biogeography attempts to reconstruct the biota history of the earth.历史生物地理学重建生物区系历史。
6 9kexx     
n.(一个地区或时代的)所有动物,动物区系
参考例句:
  • this national park is an area with unique fauna and flora.该国家公园区域内具有独特的动物种群和植物种群。
  • fauna is a biological notion means all the animal life in a particular region or period. 动物群是一个生物学的概念,指的是一个特定时期或者地区的所有动物。
7 vo7yu     
n.评价;评估;对财产的估价,被估定的金额
参考例句:
  • this is a very perceptive assessment of the situation.这是一个对该情况的极富洞察力的评价。
  • what is your assessment of the situation?你对时局的看法如何?
8 c7jxt     
vt.阻止,妨碍,抑制
参考例句:
  • don't let ego and greed inhibit clear thinking and hard work.不要让自我和贪婪妨碍清晰的思维和刻苦的工作。
  • they passed a law to inhibit people from parking in the street.他们通过一项法令以阻止人们在街上停车。
9 wwiyh     
adj.海岸的,沿海的,沿岸的
参考例句:
  • the ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
  • this country will fortify the coastal areas.该国将加强沿海地区的防御。
10 yl7xm     
adv.部分地,从某些方面讲
参考例句:
  • the door was partially concealed by the drapes.门有一部分被门帘遮住了。
  • the police managed to restore calm and the curfew was partially lifted.警方设法恢复了平静,宵禁部分解除。
11 1090843cfc7d8664c201d9881ebf16b9     
n.猎鹰( falcon的名词复数 )
参考例句:
  • peregrine falcons usually pluck the feathers and strip the flesh off their bird prey. 游隼捕到鸟类猎物时,通常是先拔掉它们的羽毛,再把肉撕下来。 来自《简明英汉词典》
  • though he doubted the wisdom of using falcons, dr. de la fuente undertook the project. 虽然德·拉·富恩特博士怀疑使用游隼是否明智,但他还是执行了这项计划。 来自辞典例句
12 mvxzk     
adj.水生的,水栖的
参考例句:
  • aquatic sports include swimming and rowing.水上运动包括游泳和划船。
  • we visited an aquatic city in italy.我们在意大利访问过一个水上城市。
13 g1czh     
n.被掠食者,牺牲者,掠食;v.捕食,掠夺,折磨
参考例句:
  • stronger animals prey on weaker ones.弱肉强食。
  • the lion was hunting for its prey.狮子在寻找猎物。
14 abb0488ed6905584ea91347395a890e8     
n.杀虫剂( pesticide的名词复数 );除害药物
参考例句:
  • vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
  • there is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》
上一篇: 下一篇:
tag标签: eggs
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片
最新评论
网站地图