反应速率

The property of the lowest excited triplet states of xanthone in acetonitrile has been investigated by using time-resolved laser flash photolysis at 355nm. The transient absorption spectra and the quenching rate constants of the excited xanthone with several amines have been obtained.

用时间分辨的激光闪光光解的方法在乙腈溶剂中研究了呫吨酮的激发三重态的性质，并得到了呫吨酮激发三重态和胺类、醇类以及酚类反应的瞬态吸收光谱和猝灭速率常数。

Most patients who have rheumatoid arthritis have a positive test for rheumatoid factor and anticyclic citrullinated peptide antibodies, as well as an elevated erythrocyte sedimentation rate and C-reactive protein.

大多数类风湿关节炎患者要进行类风湿因子、抗环瓜氨酸肽抗体阳性测定及红细胞沉降速率及 C 反应蛋白增高的检查。

To evaluate the antioxygenic property of the antioxidants, the oxidation reaction rate constants of sodium sulfite, sodium bisulfite and sodium pyrosulfite in aqueous solutions were determined.

为评价抗氧剂的抗氧化能力，测定了抗氧剂亚硫酸钠、亚硫酸氢钠及焦亚硫酸钠在水溶液中与氧反应的速率常数。

Direct competitions of intramolecular C - H insertions into benzylic C - H and 4-nitroor 4-methoxy substituted benzylic C - H of methyl 2-diazo-3-oxo-6-(4-substituted phenyl)-4-(2-phenylethyl)hexanoate 44a and 44b catalyzed by Rh-mediated carbenoid were alsoinvestigated, and the relative reactivities obtained by compound 44a or 44b were comparableto those obtained by indirect method.

此外，还研究了Rh催化分解下，对位硝基取代或甲氧基取代的4-(2-苯基乙基)-6-(4-取代苯基)-2-重氮基-3-氧代己酸甲酯44a、44b苯甲位C-H插入反应的相对速率，与化合物47a和47f得到的结果比较，数据平行。

It was confirmed that the analogous relations between unsteady one-dimensional chromatographic process and steady two-dimensional CAC process proposed by Wankat still exist regardless of the bioreaction, and the analogous results were shown. A mathematical relation between the feed and the eluant flowrates was established for keeping the CAC in good operation. The optimization of the hybrid process were also discussed.

从理论上指出了在伴有生物反应时，二维稳态CAC过程与一维非稳态间歇色谱过程仍然存在类比关系，并给出了类比结果，推导了使CAC过程处于良好操作状态时进料及洗脱速率应满足的数学关系，对于生物反应液相色谱分离耦合过程的优化原则也进行了初步探讨。

The light obsorbed by Celtis julianae 'Aurea' was mainly used in photochemical reaction and it had higher photochemical activity and electron-transferring rate.

金叶珊瑚朴所吸收的光能主要用于光化学反应，具有较高的光化学活性，且电子传递速率较快，光能利用率高。

The results show that the conversion rate of lithiophorite decreases with decreasing reaction temperature. Lithiophorite can be obtained at pH values from 5.0 to 9.0, but the circumneutral pH is more favorable for formation at atmospheric pressure.

水钠锰矿向锂硬锰矿的转化速率随着反应温度的降低而减少，在pH5-9的范围内锂硬锰矿均可形成，但中性条件最适合锂硬锰矿的形成。

Video server sends a RSVP message to reserve resource for client, and the system calculates and analyses QoS parameters using control information of RTP/RTCP packets and ICMP Echo request message, and controls the transmission grade by corresponding strategy to ensure network QoS, which enhances the system reaction to network condition and stabilizes the throughput and solves the problems of data transmission and using bandwidth fairly between multicast data and other kind of data when network is congestible and unstable.

整个模型系统主要由视频服务器、路由节点和客户端构成，通过RSVP协议进行资源预留协商，并在传输过程中利用RTP/RTCP包中携带的控制信息结合ICMP Echo请求报文提取QoS参数，对其进行分析判断，采用相应策略对传输级别进行实时控制，保障了网络QoS，提高了系统对网络状况的反应速度，降低了传输速率的波动性，较好解决了网络拥塞和不稳定时数据的有效传输以及与其他数据流公平占用带宽的问题。

With the increase of crotonaldehyde, the conversion and rapid of copolymerization decrease.

随丁烯醛在单体中比列的增加，共聚合反应转化率和聚合速率均下降。

And dissimilatory reduction capability of crystal Ferric phosphate is also investigated when using different organic acid as substrates. Water-extracted soil solutions of SiChuan, JiangXi, JiLin and HuNan were incubated under anoxic atmosphere.

在水稻土浸提液为接种液的富集培养中添加不同浓度的磷酸缓冲液作为磷源，当磷酸盐浓度大于30 mmol/L时，铁还原反应的速率和Fe的产生量相对较低，甚至有抑制作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。