查询词典 CO2

The CO2 saturation point and light saturation point of B ascended and CO2 assimilatory ability, efficienecy of light energy utilization and temperature effect increased.

低钾处理初期，B叶绿体基粒数多于A，并且片层密度加厚；低钾处理后期，B与A叶绿体结构与形态趋向一致。B的CO2饱和点上升、光饱和点上升，CO2同化能力增加及光能利用率、温度效应增加。

Furthermore, benzoic acid, p-toluic acid and p-phthalic acid were transformed slowly in sediment slurries amended with BESA (20 mM) under the condition of 100% CO2 and H2/CO2 (20/80), respectively, and the sediment slurry was dominated by methanogene bacteria.

在底泥含有甲烷菌抑制剂及上层气体分别为100% CO2和H2/CO2 (20ml/80ml)时，苯甲酸、对位甲基苯甲酸及对位苯二酸之分解变慢，且此底泥菌群是以甲烷菌为主要优势菌。

The degradation of PAHs at 0.03, 0.3, and 3 mg/g soil, either added singly or as mixtures, were evaluated for their evolved CO2 in Biometer flasks. The contaminated soil was later Soxhlet extracted with hexane. The extracts were evaporated, redissolved in dimethyl sulfoxide, and subjected for Microtox assay and Medaka embryo toxicity test. The evolved CO2 from singly PAHs addition was correlated with concentration gradient.

根据结果显示，受单一PAHs污染土壤之降解量，以CO2累积量表示，两环之Naphthalene其降解量为最多，在低浓度0.03 mg PAHs/g soil时，有所谓的诱引作用产生；受混合PAHs污染土壤之降解量，以Naphthalene对於Phenanthrene的刺激作用为最大；在复育实验方面，以添加苯酸之CO2累积量为最高，单就界面活性剂而言，则以Tween 80的表现为最佳。

The result of pyrolysis of CO2 show that the materials can decompose CO2 catalytically at 800℃.

材料用于CO2催化分解的实验结果显示，在800℃时材料对CO2具有很好的催化分解能力。

In this paper,the electrochemical reduction of CO2 by various metal electrodes in aqueous solution,organic solvent and molten salt media is reviewed,which includes reaction activity and mechanism of every kind of metal electrodes. The effect of electrode,temperature,pressure,electrode potential and electrolyte on the selective and Faradaic e...

综述了金属电极在水溶液、有机溶剂以及熔融体中电还原CO2的研究现况，包括各类金属在电还原CO2过程中所表现出的反应活性以及生成相应产物的反应机理；介绍了电极、温度、压力、电极电位和电解质等因素对金属电极电还原选择性及法拉第电流效率的影响；展望了CO2电还原的未来研究方向及应用前景。

Objective To analyze the chemical components of the extracts of Kacmpferia galanga L from supercritical CO2 extraction, and to compare the extraction efficiency between supercritical CO2 extraction and traditional water distillation.

目的 研究沙姜超临界CO2萃取物的化学成分，并比较超临界CO2提取法和传统的水蒸气蒸馏提取法的提取效果。

Results The optimal process conditions for supercritical CO2 extraction were: the pressure of 25 MPa, the temperature at 45℃ and CO2 flowing rate at 20 L/h, under these conditions the yield of volatile oil in Heracleum hemsleyanum Diels reached 0.65%.

结果超临界CO2萃取最佳工艺条件为：萃取压力25 MPa，萃取温度45℃，CO2流量20 L/h，在此条件下牛尾独活挥发油的收率为0.65%。

ConclusionThe extraction rate of volatile oils from Heracleum hemsleyanum Diels by supercritical CO2extraction process is higher than that of water vapor distillation,and the optimized extraction conditions are:extraction pressure 25MPa,extraction temperature 45℃ and flow rate of CO2 20L/h, and the yield of volatile oils is 0.65%.

结果通过各因素级差大小的比较可知：萃取压力的变化对萃取率的影响最大，萃取温度次之，而CO2流量对萃取率的影响最小。结论超临界CO2萃取牛尾独活挥发油的萃取率较水蒸气蒸馏法高，最佳萃取条件为萃取压力25MPa，萃取温度45℃，CO2流量20L/h，挥发油收率为0.65%。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality. Thus the supercritical CO2 extraction is the best way.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

The observation of the CO2 concentration and hydrogeological temporal change in different sites and depths indicates:①The seasonal change in soil CO2 concentration can be reflected from the hydrochemistry of spring and soil water;② The intensity of corros...

对不同部位不同深度的土壤CO2体积分数进行了野外监测，并利用多参数自动记录仪监测了泉水的水化学，揭示了CO2体积分数的变化规律。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。