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Intelligent nuclear instrument has been a dominant developing direction of radioactivity measurement instrument. The instrument for radon measurement of air pulse ionization chamber, based on the theory that alpha rays decayed by radon and its progeny can ionize the air molecules, can measure the radon concentration accurately.

智能核仪器已成为放射性测量仪器发展的一个主导方向，利用氡及其子体衰变放出α射线能使空气分子电离的理论设计的空气脉冲电离室α测氡仪可以准确地测量空气中的氡浓度。

To evaluate the effect of dental amalgam (low concentration of mercury exposure) on children's renal function.

目的］探讨牙科银汞合金充填物对儿童肾功能方面的影响。

The study on CO2 concentration in solid amine CO2 control system［J］.

固态胺二氧化碳控制系统中的CO2浓缩技术研究［J］。

In order to study the relation of cytochrome P-450 with the protective action of SY-801 and SY-640 against 〓-induced UDS and 3H-BP binding to nuclear DNA, the effects of SY-801 and SY-640 on liver microsomal cytochrome P-450 were studied in mice. The results indicated that the liver microsomal cytochrome P-450 concentration and aminopyrine demethylase activity were significantly increased in mice pretreated with SY-801 150mg/kg or SY-640 150 mg/kg once daily for three days.

本实验进而观察了SY-801对小鼠肝微粒体细胞色素P-450酶系的影响，结果表明SY-801和SY-640体内连续给药3天，可诱导小鼠肝微粒体细胞色素P-450含量明显增加，同时氨基比林脱甲基酶活性亦明显增加；给药1次2小时内二者均可抑制氨基比林脱甲基酶活性，而对肝微粒体细胞色素P-450含量则无明显影响。

The effect of concentration of TEOS and ammonia on the composite particles structure was also investigated.

研究了TEOS、氨水的浓度对核－壳粒子结构的影响。

The results indicate that the concentration of ammonia has a remarkable influence on nitrification rate.

结果表明，氨氮浓度对硝化速率有显著的影响。

Furthermore, COD concentration also has influence on ammoniac nitrogen adsorption by zeolite.

此外，污水中的COD浓度也影响沸石对氨氮的吸附。

The dependence of current efficiency on concentration of pyruvic acid, ammonia, and sal ammoniac.η value reached 90% at an optimum condition.

在优化的工艺条件下，电合成丙氨酸电流效率达到90%，比文献报导的64%提高了许多。

The structure properties of tube reactor for production of DAP by means of concentration AP slurry with secondary ammoniation are investigated on experimental equipment.

在实验模试装置上，研究了料浆法浓缩料浆二次氨中和生产磷酸二铵管式反应器的结构特性，建立了该反应器的液相返混参数Pe表达式和体积传质系数KGa的计算式。

Moreover, the micro-pattern etching of electrodes and PZT thin films have been investigated, and the fast and successful etchings have been actualized with new etchants and original methods. The technics and mechanism of anisotropic etching of monocrystalline silicon have been studied deeply, for example the influences of the concentration and temperature of tetramethyl ammonium hydroxide on the rate and effect of the anisotropic etching.

此外，结合PZT铁电薄膜热释电单元红外探测器的设计和制备，对电极和PZT铁电薄膜的微图形刻蚀工艺进行了研究，采用新的刻蚀液配方和具有独创性的方法，实现了对PZT铁电薄膜和上下电极快速、成功的刻蚀。

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％。