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     Owing to the characteristic of hydroxyl radical decomposing the photosynthetic pigment of phytoplankton, the contents of chl - a, chl - b, chl - c and carotenoid are all decreased 35% - 64% in 8 seconds, while the contents of chl - a, chl - b, chl - c and carotenoid are all decreased to below the lowest limit of test method after 5 minutes, which is one of the reasons of killing the phytoplankton.
     羟基具有氧化、分解浮游植物光合色素能力,在8 s内使叶绿素a、b、c及类胡萝卜素含量均减少了35%~64%,停滞5 min后,叶绿素a、b、c及类胡萝卜素含量均减少到低于检测方法的最低限值,是浮游植物致死原因之一.
     By scrubbing with dilute polysulfide solution, the residual mercury in the gas can be removed from about 0.1 to below 0.01 ppb, a reduction of 900%.
     用稀多硫化物溶液去洗涤气体中残留的汞,能从0.1ppb脱除到低于0.01ppb,减少90%。
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     PRA reached peak value on the 4th day(P<0.05),and declined to below the control level on the 22nd day.
     PRA在第4天达到峰值(P<0.05),第22天回落到低于对照水平。
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     Owing to the characteristic of hydroxyl radical decomposing the photosynthetic pigment of phytoplankton, the contents of chl-a, chl-b, chl-c and carotenoid are all decreased 35%~64% in 8 seconds, while the contents of chl-a, chl-b, chl-c and carotenoid are all decreased to below the lowest limit of test method after 5 minutes, which is one of the reasons of killing the phytoplankton.
     羟基具有氧化、分解浮游植物光合色素能力,在8s内使叶绿素a、b、c及类胡萝卜素含量均减少了35%~64%,停滞5min后,叶绿素a、b、c及类胡萝卜素含量均减少到低于检测方法的最低限值,是浮游植物致死原因之一.
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     Results In view of time-course effect,the LAMP-1 expression in the splenocytes was significantly inhibited at 8,16, 24 h after WBI by 2.0 Gy X-rays while the LAMP-1 expression was markedly enhanced at 2 h and suppressed at 48 h after WBI by 0.075 Gy X-rays.
     结果脾细胞表面的LAMP-1在2Gy X射线全身照射后8、16和24h表达明显下降; 0.075Gy X射线全身照射后2h显著升高,而48h又下降到低于对照的水平。
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     The initial (concentration) of Gymnodinium mukimotoi and that of germs are 0.89×10~4/mL and 5.2×10~5/mL respectively.
     海水羟基比值浓度达到0.68mg/L时,裸甲藻、细菌从0.89×104/mL、5.2×105/mL减少到低于检测方法的低限值;
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     when ratio concentration reach to 0.6 mg/L,content of chlorophyll-a, chlorophyll-b and carotenoid reduce instantly 73.91%,74.85% and 70.29%. After 24 h,48 h and 72 h,we can not measure photosynthetic pigment with existing method.
     当比值浓度达到0.6mg/L时,即时测量叶绿素a、b含量分别减少了73.91%和74.85%,类胡萝卜素含量减少了70.29%,而在24h、48h、72h时检测,叶绿素a、b和类胡萝卜素含量均减少到低于检测方法的最低限.
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     Malondialdehyde (MDA) content increased slowly at the early stage of desiccation and then rose rapidly after the mois-ture content was below 50.9%.
     丙二醛(MDA)含量在脱水初期缓慢上升,在含水量下降到低于 50.9%时,丙二醛(MDA)含量快速上升。
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     As a result,when the dissolved ratio of hydroxyl concentration is 063 mg/L,the protozoons,unitcell alga,germs are reduced to the lowest value of measure from 4.4×1010/m3,6.0×1010/m3,1.9×105/m3 respectively.
     把羟基溶液加入压载水输送管道内,仅距加入点4m长度地方取样检测,当压载水的羟基比值浓度达到0 63mg/L时,原生动物、单胞藻、细菌浓度分别从4 4×104/mL、6 0×104/mL、1 9×105/mL均减少到低于检测方法的最低限;
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     galbanastrain 8701:100 mg·L-1; N.
     低于100 mg.
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     E.
     E值低于成年人;
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In this study, we investigated the use of an emulsifiable diphenylmethane-4, 4'-diisocyanate (MDI) - urea formaldehyde (UF) mixture adhesive in particleboard manufacture, in order to decrease F-emission to below 9 mg per 100 g board.
      
The depressurization of a high-pressure vessel initially filled with water heated to below the saturation point is investigated.
      
The possibility of using a carbonate-containing industrial waste in purification of aqueous solutions to remove iron(III) ions to below the maximum permissible concentration was analyzed.
      
Creatine phosphate decreased to below the analytical detection limit.
      
Blood pressure initially increased, then declined continuously to below baseline within 10 min.
      
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The present research demonstrated by gas chromatography that there was zcatin in the extract of Litchi (Litchi chinensis Sonn. CV.NO MT CHI) shoottips during flower differentiation perod.In addition to zeatin other cytokinins were found in the extract by the method of ultraviolet absorption spectra.Through quantitative cytokinins bioassay in the extract solution of litchi developing buds, it was found that the contents of endogenous cytokinins during the "on" year were definitely different from those during...

The present research demonstrated by gas chromatography that there was zcatin in the extract of Litchi (Litchi chinensis Sonn. CV.NO MT CHI) shoottips during flower differentiation perod.In addition to zeatin other cytokinins were found in the extract by the method of ultraviolet absorption spectra.Through quantitative cytokinins bioassay in the extract solution of litchi developing buds, it was found that the contents of endogenous cytokinins during the "on" year were definitely different from those during the "off" year. The contents of endogenous cytokinins during the"on"year in litchi shoottip flower buds increased gradually after the critical period of differentiation and attained the peak at the beginning differentiation period of floral organs. Then it declined to a level lower than its original low level during pistil differentiation, whereas in the "off" year a stable low level cytokinin content was found in the whole developing period.According to our experimental observation, exogenous cytokinins and growth inhibitor "B9" could retard the growth and development of litchi flower inflorescences,increasing their lateral branches, and fruitset. It was shown that cytokinins not only enhanced floral differentiation of litchi,but also had an effect on its floral development.Thus the application of exogenous cytokinins and substances with similar physiological function as cytokinins would show beneficial effect during the period of flower bud differentiation and development.

用气相色谱法证明糯米糍荔枝(Litchi chinensis Sonn.cv.No Mi Chi)在花芽分化期间枝条顶芽的提取液中含有玉米素。紫外线吸收光谱法显示在这种提取液中除玉米素以外还有其它细胞分裂素类物质的存在。 通过对荔枝顶芽提取液中细胞分裂素作定量生物鉴定,了解到大年,小年结实的荔枝树的顶端发育芽,在花芽形态分化期间细胞分裂素的含量有明显的差异。大年树枝梢顶端的花芽,在花芽分化临界期以后细胞分裂素的含量逐渐增加,在花器官开始分化期达到最高峰,到雌蕊分化期又下降到低于原来的低水平。而小年树的营养芽在其整个发育过程中,细胞分裂素的含量保持在一个稳定的最低水平。 施用外源细胞分裂素和生长延缓刑B_9能抑制园锥花序的伸长,增加花序分枝及增加果穗的座果率。细胞分裂素不但能促进荔枝的花芽分化,而且还影响花芽的发育。在荔枝花芽分化和发育期间,使用外源细胞分裂素及具相似生理功能物质在促进生产上将具有相当的价值。

Alloy DZ3 without O. I percent Zr decreases tendency to hot-cracking obviously. This is due to the effect of Zr on solidification behaviour. O. I percent Zr promotes the formation of eutectie (γ+γ′) distinctly. The Ni5Zr with low melting point forms because of Zr-rich liquid film will be maintained below 1180℃, therefore, solidification range of the alloy widens by 80℃ and the intenyal between the temperature at which the interdendritie feeding action disappears and the solidus temperature enlarges by 60℃. This...

Alloy DZ3 without O. I percent Zr decreases tendency to hot-cracking obviously. This is due to the effect of Zr on solidification behaviour. O. I percent Zr promotes the formation of eutectie (γ+γ′) distinctly. The Ni5Zr with low melting point forms because of Zr-rich liquid film will be maintained below 1180℃, therefore, solidification range of the alloy widens by 80℃ and the intenyal between the temperature at which the interdendritie feeding action disappears and the solidus temperature enlarges by 60℃. This is one of the reasons that the Zr-containing alloy has high hotcracking sensibility.

DZ3合金除去0. 1%Zr显著地减低热裂倾向。这与Zr对合金凝固行为的影响有关。 0. 1%Zr明显地促进γ+γ′共晶的形成,zr偏析形成低熔点的Ni_5Zr相。在凝固过程中富Zr的液膜保持到低于1180℃的温度,结果使合金的凝固范围扩大了80℃。使失去枝晶间补缩的温度与固相线的温度范围扩大了60℃。这是含Zr含金热裂倾向大的原因之一。

The natural gas produced around the world can contain traces of mercury which have to be removed.It is difficult to purify gas to desired mercury levels using conventional techniques. By scrubbing with dilute polysulfide solution, the residual mercury in the gas can be removed from about 0.1 to below 0.01 ppb, a reduction of 900%. In the system, the gas is passed through a packed tower wetted with a solution containing 3 ppm of polysulfide salt. Stainless steel packings are effective for this application.In...

The natural gas produced around the world can contain traces of mercury which have to be removed.It is difficult to purify gas to desired mercury levels using conventional techniques. By scrubbing with dilute polysulfide solution, the residual mercury in the gas can be removed from about 0.1 to below 0.01 ppb, a reduction of 900%. In the system, the gas is passed through a packed tower wetted with a solution containing 3 ppm of polysulfide salt. Stainless steel packings are effective for this application.In addition to promoting gas-liquid contact, the stainless steel packings adsorb and concentrate polysulfides which react with Hg in the gas to form insoluble HgS, and thus remove Hg from the gas.

世界各地生产的天然气可能含有微量汞,它必须脱除。使用常规的技术去净化天然气达到希望的汞水平是困难的。用稀多硫化物溶液去洗涤气体中残留的汞,能从0.1ppb脱除到低于0.01ppb,减少90%。在该系统中,气体通过一个以含有3ppm多硫盐溶液润湿的填料塔。不锈钢填料应用于此是有效的,它除了有助于气液接触外,还吸附和集聚多硫化物与气中汞反应生成不溶解的HgS,故而从气体脱除汞。

 
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