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化石硅藻
相关语句
  fossil diatom
     Tentative Application of the CLSM Technique to the Study of Fossil Diatom Microstructure
     CLSM技术应用于化石硅藻微构造的尝试研究
短句来源
     In the present paper, one new fossil diatom species, Geissleria jianghanensis sp. nov. Li, is described.
     在对江汉平原钻孔中属晚更新世地层的化石硅藻进行鉴定时,发现1个新种:Geissleria jianghanensis sp.nov.
短句来源
     According to these diatom-pH transfer functions,the fossil diatom in the sediment were analysed to reconstruct the pH value in Llyn Hir(lake) from 1956 to 1995.It showed that the improvement of pH in 1985 was the result of liming by the history record and there was an obvious effect in the following six years but the effect weakened gradually and vanished.
     我们在Llyn Hir湖中心钻取岩芯,对顶部14.5cm进行了化石硅藻种群组合的分析,利用这些资料,根据这3个硅藻-pH转换函数模型,定量重建了该湖1956~1995年pH的变化过程. 结果显示,1985年为了改善该湖酸化状况,向湖中施加石灰引起湖水pH明显增高,这种显著效果维持了6年,此后逐渐减弱乃至消失.
短句来源
     FOSSIL DIATOM STUDIES IN PALEOLIMNOLOGY: DEVELOPMENTS SINCE THE 1980 :
     古湖沼学中的化石硅藻——80年代以来研究进展
短句来源
  “化石硅藻”译为未确定词的双语例句
     FOSSIL DIATOMS IN NO.47 BOREHOLE OF JIANGHAN PLAIN AND THEIR SIGNIFICANCE TO PALEOENVIRONMENTAL ANALYSIS
     江汉平原47号钻孔中的化石硅藻及其在古环境分析上的意义
短句来源
     APPLICATION OF NEW DIATOM INDEX IN RECONSTRUCTION OF HOLOCENE ENVIRONMENTAL CHANGES IN ANGREN LAKE, SOUTHERN XIZANG (TIBET)
     化石硅藻新指标在西藏昂仁湖环境演变中的应用
短句来源
     NEW SPECIES AND NEW RECORDS OF FOSSIL DIATOMS FROM THE LATE PLEISTOCENE OF THE JIANGHAN PLAIN, HUBEI PROVINCE
     江汉平原晚更新世化石硅藻新种和新记录属种
短句来源
     In the upper section (46.6--2.2m, Pleistocene to Holocene) of Borehole 47 located inJianghan Plain, Jiangling County, Hubei Province, the sediments are loose sand and clay, containing abundant fossil diatoms.
     在江汉平原47号钻孔中的46.60—2.20m层位上(上更新统到全新统),含有丰富的化石硅藻,经鉴定有4个新种类,即Cymbella jianghanensis sp.nov. ,C.
短句来源
     The No. 47 borehole is located at Jiangling County in the Jianghan Plain, Hubei Province, China. There are abundant sedimentary diatoms (about 26 genera and 148 taxa) in the upper section (46.6-2.2m) of the borehole.
     江汉平原47号钻孔,位于湖北省江汉平原的江陵县,在其上段的46.6-2.2m层位上,有丰富的化石硅藻,约有26属148种,其中绝大多数是现存的淡水种类,并以附生性、沿岸带和浅水性的种类为主。
短句来源
更多       
  相似匹配句对
     THE DIATOMS OF MT. HUASHAN
     华山的硅藻
短句来源
     FOSSIL DIATOM STUDIES IN PALEOLIMNOLOGY: DEVELOPMENTS SINCE THE 1980 :
     古湖沼学中的化石硅藻——80年代以来研究进展
短句来源
     Thereafter, diatomyids are rare and infrequently recorded as fossils.
     其后的硅藻鼠种类少且鲜有化石记录。
短句来源
     Talk about fossil energy
     漫谈化石能源
短句来源
     THE METHOD OF RECONSTRUTION OF FOSSILS
     化石复制方法
短句来源
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  fossil diatom
Fossil diatom algae first found in the Paleogene marine succession (Alugivayam Formation) of the Il'pinskii Peninsula, northeastern Kamchatka are studied, and new data on molluscan assemblages from the same sequences are presented.
      
Fossil diatom assemblages preserved within the sedimentary record in Arctic lakes provide the potential to reconstruct past changes in important limnological variables.
      
Sediment records can be disturbed by erosional and redepositional events, which redeposit microfossils within a basin and may then lead to misinterpretations of fossil diatom assemblages.
      
Consequently, the fossil diatom data can be used to establish a continuous record of past climate variability over approximately the past 1300?years.
      
It has been thoroughly documented by the gradual change in the composition of the fossil diatom floras.
      
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This article on the. succession of diatom flora in one natural water body in Taigu Shanxi, located at 37°26′N and 112°33′E, 739 metres above sea level. The yearly average air temperature was about 11 degrees, the Jan, average air temperature was 5 to 6 degrees below zero centigrade, and the July,average air temperature was 24 to 25 degrees. The diatom investigation began with the collection of specimens month by month at said location from Nov. 1978 to Jan. 1981, then, perennial glass sections were made examine...

This article on the. succession of diatom flora in one natural water body in Taigu Shanxi, located at 37°26′N and 112°33′E, 739 metres above sea level. The yearly average air temperature was about 11 degrees, the Jan, average air temperature was 5 to 6 degrees below zero centigrade, and the July,average air temperature was 24 to 25 degrees. The diatom investigation began with the collection of specimens month by month at said location from Nov. 1978 to Jan. 1981, then, perennial glass sections were made examine under the microscopic, the result of, the primary appraisal total 10 families, 25 genera,104 taxa. It may beseen in the succession of diatom flora the condition of growth and decline for diatom species month by month in that water body. Amony them some species such as Melosira varians Ag, Cyclotella kuetzingiana var. schumannii Grun, Cymbella cymbiformise (Ag Kuetz.) V. H, appear throughout the year. Other species appear from April or June to Jan of next year, Pinnularia gibba Ehr appears from April to Jan of the next year, Caloneis silicals (Ehr.)C1 appears from June to-Jan of the next year,some Species,such as Caloneis permagna (Bailey) Cleve,Neidium iridis(Ehr.)C1 appears only once or twice in a year. The anther considered that the dominant factor which influence the condition of growth and decline was the temperature, because when temperatures in these two seasons, spring and autumn are similar the diatom species appears the same with each other, more or less. So the species which appear all the year round are slow in reacting to temperature,and some species which appear only 1 or 2 times are highly sensitire to temperature. If some species appear in quantities a certain period, the temperat e may be regraded as highly suitable, for example P. gibba in Oct. When the air temperature is 26 degrees(July)and water temperature 25 degrees, the species is noticed frequently, if the temperature falls below the above-mentioned condition the apperence of this species of diatom gradually increases. Thus !The limits of temperature for a culture of diatom are providod as well as the accuracy of the fossil reeuce value in determining the temperature at a given time.

本文报导了山西省太谷县一个天然水体硅藻区系的演替。标本自1979年11月到1981年1月逐月定点采集,初步鉴定的结果,共10科25属104个分类单位。从逐月硅藻种类的消长情况,看出该水体硅藻区系的演替,其中一些种常年出现,如:库津小环藻叔曼变种Cyclotella kuetzingiana var。Schumannii Grun,变异直链藻Melosira varians Ag。新月形桥弯藻Cymbella cymbiformis(Ag?Kuetz)V.H.另一些种从4月或6月到次年1月出现,前者如:弯羽纹藻Pinnularia gibba Ehr,后者如:短角美壁藻Caloneis silicula(Ehr.)Cl,有些种在一年中仅出现1——2次,如:大美壁藻Caloneis permagna(Bailey.)Cleve.,彩虹长篦藻Neidium iridis(Ehr.)Cl.,作者认为常年出现的种对温度反应极为迟钝。而一年中仅出现1——2次的种则对温度反应极为敏感。如果在某一个时期一些种大量出现,可以看作这种温度为最适温度,如;弯羽纹藻P.gibba Ehr。10月气温16℃,水温14℃。这样就提供了培...

本文报导了山西省太谷县一个天然水体硅藻区系的演替。标本自1979年11月到1981年1月逐月定点采集,初步鉴定的结果,共10科25属104个分类单位。从逐月硅藻种类的消长情况,看出该水体硅藻区系的演替,其中一些种常年出现,如:库津小环藻叔曼变种Cyclotella kuetzingiana var。Schumannii Grun,变异直链藻Melosira varians Ag。新月形桥弯藻Cymbella cymbiformis(Ag?Kuetz)V.H.另一些种从4月或6月到次年1月出现,前者如:弯羽纹藻Pinnularia gibba Ehr,后者如:短角美壁藻Caloneis silicula(Ehr.)Cl,有些种在一年中仅出现1——2次,如:大美壁藻Caloneis permagna(Bailey.)Cleve.,彩虹长篦藻Neidium iridis(Ehr.)Cl.,作者认为常年出现的种对温度反应极为迟钝。而一年中仅出现1——2次的种则对温度反应极为敏感。如果在某一个时期一些种大量出现,可以看作这种温度为最适温度,如;弯羽纹藻P.gibba Ehr。10月气温16℃,水温14℃。这样就提供了培养硅藻的温度范围。同时,也可以作为鉴定化石硅藻时推测当时(古气候)的参考。

In this paper,surface diatom samples of 131 have been analysed by using HCl and H_2O_3 for the abysmal samples and the samples from the continental shelfs.Distinguished were 191 species,of which 10 common species are in detail discussed on their distributed ranges and the various numbers with changes of environmental factors such as depth,temperature and salinity etc..The results show that the depth has a marked effect on the distribution of benthic species, but plays a less important role in the planktonic...

In this paper,surface diatom samples of 131 have been analysed by using HCl and H_2O_3 for the abysmal samples and the samples from the continental shelfs.Distinguished were 191 species,of which 10 common species are in detail discussed on their distributed ranges and the various numbers with changes of environmental factors such as depth,temperature and salinity etc..The results show that the depth has a marked effect on the distribution of benthic species, but plays a less important role in the planktonic species;temperature and salinity exert a tre- mendous influence on both kinds of species. Climatic changes of Quaternary glacial and interglacial periods resulted in many times of transgression and regression in the coast region of China.The research on paleogeography,paleo- climate,sea level fluctuation and division of Quaternary sediments is an important content of the diatom analysis based on changes of the components of the diatoms from the column section. Diatoms from the Quaternary core in the mouth of Minjiang River,Fujian have been studied and 4 diatom assemblages have been distinguished repressenting 4 periods of paleogeographic phases of continent-sea and continental transition-shallow sea-intertide zone, of which the first period may be dated as the late Late Pleistocene and other periods as the early,the middle and the late Holocene respectively. The diatoms from the reworked sediments often have broken valves and dirty surface.Be- cause the ecological environment that diatoms from the reworked sediments require does not tally with that of today,these diatoms should be producer of lower sea level in the late Pleisto- cene.

本文详细研究了中国海表层沉积物中的常见化石硅藻,结果表明,这些种的分布范围及数量变化随环境的不同而变化。因此,根据柱状样品中这些种类数量的变化,能够推断古气候变化,恢复古地理环境,再现海平面波动历程,进而划分、对比第四系地层。

According to 107 dating data including 9 kinds of paleosea level indicators which the deposit depth and tectonism correction have done, the sea level change curve in Zhujiang Delta during the past 8000 years, has been drawn. Sea level rose quickly before 6000 years, descended from 6000 years B.P. to 5500 years B.P. rose from 5500 years B.P.to 2800 years B.P., descended from 2800 years B.P.to 2200 years B .P., rose from 2200 years B.P.to 900 years B.P. and descended slightly from 900 years B.P. to 600 years B.P....

According to 107 dating data including 9 kinds of paleosea level indicators which the deposit depth and tectonism correction have done, the sea level change curve in Zhujiang Delta during the past 8000 years, has been drawn. Sea level rose quickly before 6000 years, descended from 6000 years B.P. to 5500 years B.P. rose from 5500 years B.P.to 2800 years B.P., descended from 2800 years B.P.to 2200 years B .P., rose from 2200 years B.P.to 900 years B.P. and descended slightly from 900 years B.P. to 600 years B.P. Each one included several shifts. The sea level change was in accord with the verticalchange of diatoms in core samples,the climate change reflected by sporo-pollen analyses of samples, the deposit periods of sand bar and the changes of ancientculture relics sites

本文对9类古海面标志物的107个样品年代数据进行沉积深度棱正、构造升降幅度校正后,绘出珠江三角洲8000年来海平面变化曲线。珠江三角洲8000年来海平面变化可分为趾今6000年前海平面急剧上升、距今6000—5500年海平面波动下降、距今5500—2800年海平面波动上升、距今2800—2200年海平面波动下降、距今2200—900年海平面波动上升和距今900—600年海平面轻徽下降6个阶段。海平面变化曲线与化石硅藻垂向变化、孢粉反映的气候变化、滨岸沙堤形成期和古文化遗址堆积的变化等有较好的一致性。

 
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