查询词典 nutrient

Tissue composition analysis, nutrient enrichment and starvation treatments, bioassay and in situ extracellular alkaline phosphatase activity determination showed that growth of Sargassum duplicatum, Codium edule and Ulva latuca were limited by phosphorus during the early growth period while nitrogen during the fast growth period. Growth of Enteromorpha linza, Gracilaria coronopifolia and Laurencia papillosa were limited by phosphorus.

南湾及眺石海水优养化可能是造成大型海藻单位面积生物量明显增加的原因，藻体营养分析、室内营养盐添加与不添加处理、bioassay及insitu 细胞外磷酸分解酵素活性证明重缘叶马尾藻、食用松藻及大石莼的营养盐限制因子在初期是磷而快速生长期是氮而浒苔、伞房龙须菜及乳头凹顶藻是磷。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C. communis grown in normal soil. Several aspects were examined, including: difference of copper tolerance and accumulation between C. communis grown in copper mine deposit and that grown in normal soil; difference of growth and nutrient accumunation between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; physiological differences between between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; subcellular distribution and chemical forms of Cu in C. communis; identification of cDNA fragments differentially expressed in C. communis grown in copper mine deposit; genetic diversity and copper tolerance of C. communis, tolerance mechanisms to copper in C. communis are discussed.

中文题名鸭跖草对铜的耐性机理和富集特征研究副题名外文题名 Mechanisms of Cu tolerance and accumulation by Commelina communis 论文作者廖斌导师蓝崇钰束文圣学科专业环境科学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2003 论文页码总数128页关键词重金属污染植物修复超富集植物土壤污染铜污染鸭跖草馆藏号BSLW /2003 /X53 /12 论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

And the addition of nutrient salt is more preferable for compendency yeast species with the addition quantity 20～40mg/L.

营养盐的添加较适于凝集性酵母菌种，添加量在20～40mg/L之间。

Objective: To study the changes of nutrient contents in Chinese goldthread soil before and after planting Coptis chinensis.

通过对种植黄连土壤营养条件进行研究，为黄连的科学施肥提供依据。

Objective To explore the nutrient requirements and compound the feed scientifically for red crucian carp as laboratory animal.

目的探讨红鲫实验动物的营养需要、科学配制红鲫饲料。

Nitrogen and phosphorus concentrations, N:P ratio, nutrient retranslocation efficiency of mature and senescent leaves in pure and mixed protection forest of Betula luminifera and Cunninghamia lanceolata were discussed in this paper.

以福建省三明市郊国有林场的光皮桦、杉木为研究对象，探讨了纯林和混交林成熟叶与衰老叶中的养分状况、氮磷比、养分内转移率以及它们之间的关系。

Iron deficiency is one of the most common nutrient deficiencies worldwide, because iron is difficult to get and absorb in the proper amount from the diet alone (Taber's Cyclopedic Medical Dictionary).

全世界最常见的营养不足是缺铁，因为铁是很难仅通过饮食，得到和吸收。

In this study,Cynodon Rich is selected as the trial plant to study the process of nutrient cycling in a substrate-vegetation system of rock slopes with observation tests simulating rock slopes.

该文以狗芽根为建植植物，利用模拟边坡的观测试验，对岩石边坡基质-植被系统的养分循环过程进行了研究。

Cipangopaludina chinensis is a normal kind of freshwater gastropod and has high economic values because it can be food for people, which not only tastes well but also is high nutrient, and it can be the bait for some carnivorous fish and some omnivorous fish such as Mylopharyngodon piceus and Cyprinus carpio.

中国圆田螺Cipangopaludina chinensis是我国一种常见的可供食用的淡水螺，滋味鲜美，具有较高营养价值；同时它还是青鱼、鲤鱼等肉食性鱼类和杂食性鱼类的优良天然饵料，因而具有较高的经济价值。

What's more, the hybrids remained the dominant Daphnia species decades after pollution control measures brought nutrient levels back to normal.

此外，杂交物种数十年间依旧保持着优势地位，运用污染控制措施使营养水平恢复正常。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。