等浓度

Key players at the base of the marine food web are diatoms (unicellulor algae with silicified cell walls) and their main predators, the herbiorous copepods.

本文对硅藻产生的防御性物质oxylipins的化学生态学及其在极低浓度下如何其作用进行了综述，同时对其生物合成、测试和化学防御对浮游生物群落结构的影响等进行了讨论。

Odor pollutants can be controlled in the early, middle and late raising-stage in a scaled pig farm. Tests and experiments showed that feed additives contained deodorant microorganisms and other chemical ingredients could reduce ammonia and sulfuretted hydrogen efflux 38.6% and 20.6% in pigsty, and 14.7% and 20.4% in wastewater adjusting tank respectively, meanwhile odor concentration was remarkable reduced 43.8%.

集约化猪场恶臭的生物处理可以在饲养的营养技术、饲养过程和粪便处理阶段分别处理，试验表明使用含有微生物制剂等成分的除臭剂为饲料添加剂，可使猪舍氨气和硫化氢分别降低38.6%和20.6%，调节池中氨气和硫化氢分别降低14.7%和20.4%，臭气浓度降低43.8%。

Influences of hydrogen sulfide, element sulfide, mercaptan, sulphuring ether, disulfide individually on silver strip corrosion of jet fuel, and of element sulphur coexisting with other sulfide on silver strip corrosion of jet fuel were studied.

考察了硫化氢、元素硫、硫醇、硫醚、多硫化物等单独存在时对喷气燃料银片腐蚀的影响；同时研究了元素硫与其它硫化物以不同浓度混合时对喷气燃料银片腐蚀的影响。

The results show that the content of Eu in rice root,stem and leaf reaches the highest in tillering stage when the same concentration is given,however in tasseling stage,the lowest. Change of content of the substance in rice appears the "low-high-low-high" rule as rice stages going on.

作者首次采用标记示踪法测定了水稻在秧苗期、分蘖期、壮苞期、抽穗期、乳熟期等5个生育期吸收铕的情况为：同一处理浓度下，水稻根、茎、叶的铕含量在分蘖期最高，抽穗期最低，水稻中铕含量随生育期呈低-高-低-高的变化规律。

OBJECTIVES: We tested the hypothesis that titrating corticosteroid dose using the concentration of exhaled nitric oxide in exhaled breath Fe(NO results in fewer asthma exacerbations and more efficient use of corticosteroids, when compared with traditional management.

Dominick等设计本实验以期验证一个新的假说：与传统管理方法相比，以测定哮喘患者呼出气NO的浓度来调整糖皮质激素的剂量可减少哮喘急性发作并使激素的使用更有效。

Secondly, effects on the structure and topographies of self-assembled enzyme films of assembling conditions that were substrates with different charge density, assembling time, pH value and concentration of enzyme solution, were studied.

其次探讨酶自组装过程中酶溶液的浓度、pH值、组装时间以及基材的电荷密度等因素对酶/PET-CO〓自组装膜的表面形态结构与特性的影响。

Even if use old car, when 25 ℃,、 of benzene 、 toluene always volatilizes the ill other people such as organic matter still exceeds bid, and thick degree lift and increase what follow temperature.

即使是使用多年的车，在25℃时，苯、甲苯、总挥发有机物等有害物仍然超标，且浓度随温度的升高而增加。

Board of inquiry chose 18 monitoring point in Beijing high street, undertook in different period of time ill other people detects respectively, as a result discovery is nodded every almost inside heavy traffic period of time, carbon monoxide 、 always volatilizes the harmful thing such as organic matter is great degree all exceed national level.

调查组在北京主要街道选择了18个监测点，分别在不同时段进行了有害物检测，结果发现几乎每个点在交通拥挤时段内，一氧化碳、总挥发有机物等有害物浓度均超过国家标准。

It has an important role in regulating the cell volumn, cytoplasmic PH and Ca2+ levels through the Na+/H+ and Na/Ca exchangers, respectively, and in driving a variety of secondary transport processes such as Na+-dependent glucose and amide acid transport.

钠钾ATP酶是维持生物体功能的最基本的酶之一，它通过形成细胞内外钠钾离子的浓度递度来维持细胞膜静息电位、渗透压的稳定、营养物质的主动运输与吸收等多种生理功能。

With common industrial pure aluminum L2 as experimental material, a sulfuric acid AC anodization and black nickel plating process was used to reduce the cost of processing, focusing on the analysis of the effects of temperature, current density and mass concentration of nickel ions on the performance of the black coating.

研究以常用的工业纯铝L2为实验材料，采用硫酸交流电阳极氧化和电镀黑镍工艺来降低成本，着重分析温度、电流密度、镍离子的质量浓度等对黑色膜层性能的影响。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。