查询词典 CO2

The carboxylation efficiency on May of 1 and 2 year needle of slash pine's half-sib was the lowest while the carboxylation efficiency on August to September of 1 and 2 year needle of slash pine's half-sib was the highest.

使用LI-6400便携式光合测定系统，研究了湿地松优良半同胞家系的光和CO2响应情况，结果表明：不同湿地松半同胞家系光响应曲线、CO2响应曲线的特征参数在家系品种间有极显著差异。

According to the opening or closing spiracle , a typical discontinuous gas exchange cycle has three distinct phases: the closed period with little or no external gas exchange, the flutter period during which oxygen enters tracheae and little CO (2) escapes and the open period during which lots of CO (2) escape.

根据气门开闭，一个典型的不连续气体交换循环(discontinuousgas exchange cycle， DGC)可以明显分为3个阶段：关闭阶段，极少或没有气体交换；颤动阶段，气门迅速微开和关闭， O2进入气管，少量CO2释放；最后是开放阶段，大量的CO2释放。

Using a model of CO2 flux,the net uptake of atmospheric CO2 in the Antarctic Ocean is 0.068GtC,0.072 GtC,0.071 GtC,0.074 GtC in Dec,1999, Jan,2000,Dec,2004 and Jan,2005 respectively.

并估算出在1999年，2000年，2004年和2005年，南极海域年平均碳吸收能力为：0.476 GtC，0.489 GtC，0.511GtC，0.518 GtC。

The principle of the method is for NaOH solution to absorb CO 2 released by soil breath,then for acid to titrate the remaining NaOH to calculate released CO 2 amount.

方法原理是用NaOH溶液吸收土壤呼吸释放出的CO2，然后再用酸滴定剩余的NaOH，从而计算出CO2释放量。

This paper takes the CO_2 concentration of train compartment as the control object in order to control fresh air.

目前，我国空调列车中的新风供给方式仍然采用新风定量控制的传统模式[1]，导致车厢内CO2浓度(CO2体积与车厢容积的比值)随着旅客人数以及抽烟量增加等因素而上升，严重影响车厢内的空气品质。

Using supercritical CO 2 to extact Agrimonia Pilosa Ledeb Extractive from Agrimonia Pilosa Ledeb ,thl best technelogic condition of it is,temperature 35～40℃;Pressure 16MPa;exact desage about 3000L Per grou

研究利用超临界CO2 从鹤草芽中萃取鹤草芽浸膏的工艺条件，考察了温度、压力、萃取剂用量等对浸膏收率的影响，结果表明，用超临界CO2 从鹤草芽中萃取鹤草芽浸膏的最佳萃取工艺条件为：温度 3 5～4 0℃，压力 1 6MPa，萃取剂用量：每组实验 3 0 0 0L左

The invention relates to a method for preparing arylamine compounds by the catalytic hydrogenation of arene nitro compounds in a H2O-CO2 system, wherein H2O-CO2 is taken as reaction medium, and the arylamine compounds are prepared by the selective hydrogenation of the arene nitro compounds at a low temperature(between 25 and 100 DEG C), and the catalytic process is controllable, highly efficient and green.

本发明涉及H 2 O-CO 2 体系中芳烃硝基化合物催化加氢制备芳胺类化合物的方法。以H 2 O-CO 2 为反应介质，由芳烃硝基化合物低温(25-100℃)选择性加氢制备芳胺类化合物的可控、高效、绿色催化过程。

N,N′-Disubstituted ureas,used as intermediates for synthesis of pesticides,resin precursors and carbamates,were synthesized from carbon dioxide and primary amines(namely n-propylamine,n-butylamine,n-amylamine,n-hexylamine,benzylamine and aniline) over organic base catalysts.

以有机碱为催化剂，CO2与伯胺反应合成了N，N′-二取代脲；考察了有机碱种类、伯胺碳链长度、反应温度、CO2压力、反应时间、催化剂用量对合成反应的影响。

Thermodynamics parameters show that the temperature in formation within 7 000~8 000 m of the basin is not so higher as decomposed temperature of pure calcic carbonate.

研究发现上覆层段的储集砂岩中含有丰富的菱铁矿(该矿具有低的热分解温度)，其能够与硅酸盐岩发生化学反应生成CO2，后者有可能成为气藏中CO2来源的一部分。

Rainfalls can " deposit " the co2 in air , making it to take part in the process of karst , to dissolve and corrade carbonate rock . co2 concentration in soil become lower after heavy rainfall and become higher after general rainfall .( 8 ) the value of chemical characteristic of soil water in the high elevation area is lower than that in the low elevation area

降雨可以对coz产生影响，&沉淀&大气中的co ：，使其参与到岩溶作用中，溶蚀碳酸盐岩；降雨对土壤空气中coz的影响与雨强、雨量有关，降雨量、雨强较大时，土壤空气中的c02产生受到抑制，降雨量和雨强较小时，土壤空气中的coz浓度升高。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。