The optimum concentration of urea nitrogen was 20 ppm, higher or lower than this level were not fit for the growth and reproduction of the diatoms.

Studies on DCCA of the attached diatom community in headwater rivers of Fenhe Reservoir

汾河水库水源河着生硅藻群落的DCCA研究

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Comparative Experimental Study on Diatomite and SBS Modified Asphalt Mixture Pavement Performance

硅藻精土与SBS改性沥青混合料路用性能比较试验研究

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An Improved Protocol for Low Copy Number Plasmid DNA Purification with Diatomaceous Earth

一种有效纯化低拷贝质粒DNA的改良硅藻土法

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Si is the essential element for growth and development of diatom, and plays an important role in the construction of cell wall, in the formation of pigment, protein and DNA as well as in the process of cell division.

硅是硅藻生长发育的必要元素，除作为细胞壁结构成分外，还参与光合色素合成、蛋白质合成、DNA合成和细胞分裂等多种代谢和生长过程；

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In terms of principle components analysis, detrended correspondence analysis and canonical correspondence analysis, a diatom-pH transfer function could be reconstructed by using the modern diatom data and pH from 34 lakes in Wales.

PCA、DCA和CCA分析显示，可以利用英国威尔士地区34个湖泊表层沉积物的现代硅藻组合和pH数据，建立硅藻-pH转换函数。

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Other environmental factors, like solar UV radiation and nutritive salt, could also affect the photosynthetic responses of diatoms, the combination effects of these factors need to be explored.

与此同时，其他环境因子，如阳光UV辐射，营养盐变化等都会对硅藻的光合生理产生影响，这些因子的耦合效应将会对硅藻产生怎样的影响，迄今，还尚未得到充分的认识。

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Plasmid-like DNAs have been discovered in green algae, red algae and diatom species etc.

已在绿藻、红藻与硅藻等真核藻中发现有质粒状DNA，其结构一般是环状或线状的双链DNA小分子。

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The cloning and sequence analysis of the 5.8S rDNA and its region from three strains of marine diatoms

三株赤潮硅藻5.8S rdna及转录间隔区（ITS）的克隆及序列分析

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The diatoms are regarded as good indicators for water environment.

硅藻被认为是水体环境的良好指示藻类。

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Cell abundance of planktonic diatoms in the survey area is relatively low, it is due to nutrient restriction, but there are two high concentration areas near northeast of Taiwan Island and 30 ° N, 127 ° E.

调查区浮游硅藻的细胞数量偏低，主要受营养盐的限制，在台湾岛东北和30°N，127°E附近海域有两个密集区。

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The disc diatomite layer is mostly grade ⅰ with lower Fe content and variable thickness, but the diatom is broken badly in local zone.

圆环硅藻土矿层厚度有变化，大多为Ⅰ级土，含Fe低，但局部见硅藻严重破碎现象。

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Forensic Analysis on 40 Cases of Suspected Drowning by Organic Diatom

40例可疑溺死案件脏器中硅藻检测的法医学分析

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The physiological and biochemical factors affecting the diatom nutritive value;

影响硅藻营养的生理生化因子；

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Influence of PROPERTY-MODIFICATION of Diatomite on removing fluorine in industrial wastewater

硅藻土改性对工业废水降氟效果的影响研究

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PCR amplification, cloning and sequencing the ITS and 5.8S rDNA or LSU rDNA from some strains of dinoflagellates and diatoms.

本论文通过对一些原甲藻株和硅藻藻株的ITS序列、5.8S rdna或LSU rDNA进行PCR扩增、克隆和序列测定。

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Localized enlargement can also be observed during further growth of elongated structures, displaying some features of the earliest recognizable stage of valve development in diatoms.

而PL浓度的进一步增大会导致拉长结构进一步生长，并出现局部膨胀现象，这些都展示出硅藻壳面发育早期的一些特征。

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Study of the Culture Conditions of Two Species of Benthic Diatoms

两种海洋底栖硅藻的培养条件研究

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The passivation effect of modified bentonite and diatomite on Cu in soil significantly increased. With 10% dosage of these materials, the soluble Cu decreased to 79.08% and 47.52%, residual Cu increased to 78.06% and 72.85%, respectively.

膨润土和硅藻土改性后对土壤Cu的钝化能力有了显著的提高，10%用量时可溶态降幅分别达到79.08%和47.52%，残渣态增幅为78.06%和72.85%。

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To discover the optimal ratio of nitrogen to phosphorous for freshwater pelagic diatom ( Bacillariophyta), we take 3 times trials on condition that the concentration of N is 0.5 mg/ kg.

在以氮为0.5mg·kg-1的条件下对淡水浮游硅藻的最适氮磷比进行了3次试验。

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The results of X-ray energy spectroscopic analysis and investigation of different parts of siliceous crust walls of diatoms of different genera and species are summarized in this paper as well.

总结了对不同种属硅藻的硅质硬壳不同部位的X射线能谱成分分析和研究结果。

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