杂质

This thesis demonstrates the pre-polymers in a polymer-dispersed cholesteric liquid crystals can be polymerized into a polymer film, which can eliminate the aligning capability of the homogeneous alignment layer. Thereafter, the textures of the cholesteric liquid crystals in UV-cured region can be changed from reflective planar texture to the scattered focal conic one. Additionally, the clearing temperature of the liquid crystals can be reduced by doping with chiral dopant or monomers. The cause is the increase of the impurity concentration in LCs. In other words, if the monomers are polymerized, the clearing temperature of LCs in that region should increase due to the decrease of the impurity concentration. Therefore, impurities associated with doping with monomeric and chiral dopants cause the clearing temperature of LCs in cured region to differ from that in uncured region.

本文中，我们提出在高分子聚合物薄膜之胆固醇液晶(polymer-dispersed cholesteric liquid crystals，简称PDCLCs)中，利用紫外光使PDCLC中的单体聚合成薄膜，此即为光引致聚合反应，而该薄膜将原本在表面所作的配向膜覆盖且破坏其配向能力，使胆固醇液晶由原本反射的planar结构转换成散射的focal conic结构；另外，有关液晶材料的相变温度会由於掺杂手性分子或单体而降低，此因液晶材料内『杂质』浓度增加，而造成的液晶材料之不纯度增加，最终导致相变温度降低，若搭配上述光引致聚合反应，则由於光照区之单体聚合，使该区域单体占总材料之比例下降，即不纯度降低，进而使液晶材料之相变温度上升，该区域之相变温度与未照光区有所不同。

The upper layer, with homogeneous composition, is mainly composed of intact phosphatic foraminifer fossils and nannofossils as well as abiotic carbonate fluorapatites, representing the biologic and autogenic origin. However, the lower layer, with visible metasomatic texture and relatively high Si, Al, K and Fe, is notably different from the upper one, and seems to have been formed mainly by replacement of carbonates.

上层磷酸盐由大量形态结构清楚的磷酸质有孔虫和超微化石以及非生物碳氟磷灰石组成，成分均一，杂质少，表现出生物成因和原生白沉积特点；下层磷酸盐变化复杂，具有特征的交代结构，混杂较高的Si、Al、K、Fe成分，显示以磷酸盐交代碳酸盐成因为主。

Does not allow a ferromagnetic impurities, and particles into the magnetic drive and vice friction bearings.

1不允许有铁磁杂质、颗粒进入磁力传动器和轴承摩擦副。

The ethanol from biomass removes impurities, for example carbon dioxide, fusel oil ect, in ethanol distillation process, and then goes into the reactors for dehydration reaction in gaseous state after preheating vaporization.

由生物质制得的乙醇在精馏段除去二氧化碳、杂醇油等杂质，精馏后的乙醇经过预热汽化在气相状态下进入反应器进行脱水反应。

Where is the most delicious soup, with beef brisket, bone, Sichuan peppercorns, star anise, lemongrass, geraniol, white pepper, etc. to burn less than 8 hours, remove the pot to keep the process of burning out the impurities, the final out is the beef broth .

最美味所在是汤底，以牛腩、牛骨、花椒、八角、香茅、香叶、白胡椒粒等煲足8小时，煲的过程要不断去掉煲出来的杂质，最后出来的就是牛肉清汤。

The change rules of precipitation ratio, microstructure and particle size and the effect of oleic acid on the seed precipitation of sodium aluminate solution were investigated. According to these experimental results, the total energy and electronic structure of oleic acid locating on gibbsite (001) and face (100) with different modes were calculated, and the equilibrium and growth morphology of the systems were analyzed.

研究添加油酸杂质时，铝酸钠溶液分解过程中分解率、氢氧化铝产品的形貌和粒度的分布变化规律；计算以各种不同方式位于氢氧化铝的(001)和(100)面时油酸分子的总能量和电子结构，并分析各体系的平衡形态及生长习性。

School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）Abstract: The change rules of precipitation ratio, microstructure and particle size and the effect of oleic acid on the seed precipitation of sodium aluminate solution were investigated. According to these experimental results, the total energy and electronic structure of oleic acid locating on gibbsite (001) and face (100) with different modes were calculated, and the equilibrium and growth morphology of the systems were analyzed.

摘 要：研究添加油酸杂质时，铝酸钠溶液分解过程中分解率、氢氧化铝产品的形貌和粒度的分布变化规律；计算以各种不同方式位于氢氧化铝的(001)和(100)面时油酸分子的总能量和电子结构，并分析各体系的平衡形态及生长习性。

Which is formed as a result of geological vicissitudes including diastrophic movement, eruption of volcano, sedimentation, glaciation and weathering etc.

这些杂质通常都是由地质运动造成的，包括地壳运动，火山爆发，沉降，冰河和风化等等

Unfinished fabrics, referred to as greige or grey goods, contain many impurities, have a harsh hand and little esthetic appeal.

未经整理的织物一般称为坯布，坯布多含有杂质，手感粗糙，外观不佳。

Unfinished fabrics, referred to as greige or grey doods, contain many impurities, have a harsh hand and little esthetic appeal.

未经整理的织物一般称为坯布，坯布多含有杂质，手感粗糙，外观不佳。

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％。