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Selective hydrogenation for pentadiene in FCC C 5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

采用离子交换法制备了Pd/D0 0 5树脂催化剂，对催化裂化C5 馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

A Pd /D005 resin catalyst was prepared by using ion exchangemethod.Selective hydrogenation for pentadiene in FCC C5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

采用离子交换法制备了Pd/D005树脂催化剂，对催化裂化C5馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

A Pd /D005 resin catalyst was prepared by using ion exchange method.Selective hydrogenation for pentadiene in FCC C5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

摘 要：采用离子交换法制备了Pd/D005树脂催化剂，对催化裂化C5馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

In this section, the distributions of trace elements among vitrinite, inertinite and minerals, as well as their organic affinities are calculated by the introduction of Solari method and by the petrological analysis to all fractions obtained in the sink-float experiments.

通过浮沉试验，结合煤岩学分析，运用Solari方法，首次计算了不同地质背景煤中各种微量元素在镜质组、惰质组及矿物中的分配比例，并计算了微量元素的有机亲和性。

Nanometer and micrometer ZrO2 particle-filled poly (phthalazine ether sulfone ketone) composites with various filler volume fractions were prepared by heating compression molding. The hardness and flexural strength were tested.

采用热压成型的方法制备了纳米、微米ZrO2填充聚醚砜酮复合材料；考察了复合材料的显微硬度和弯曲强度；并研究了干摩擦条件下纳米、微米ZrO2颗粒对复合材料摩擦磨损性能的影响；利用扫描电子显微镜观察分析ZrO2/PPESK复合材料磨损表面形貌及磨损机理。

Linear regression analysis demonstrated that GI, whichrepresented phytotoxic behavior to the plants, could be poorly predicted by the sum of mobilemetal fractions (exchangeable +carbonate +reducible iron and manganese+ organic matter bound,EXCH+CAR+FeMnOX+OMB), i.e., Cu (EXCH+CAR+FeMnOX+OMB) in SS, Pb (EXCH+CAR+FeMnOX+OMB) in SM.

在用重金属有效性形态之和(交换态+碳酸盐结合态+铁锰氧化态+有机结合态，EXCH+CAR+FeMnOX+OMB)回归青菜与黑麦草发芽指数的方程中，只有污泥堆肥中的Cu和猪粪堆肥中的Pb与青菜及黑麦草的GI线性相关。

The results indicated that more than 44% of P was localized in the cytoplasmic supernatant fractions in roots, petioles and pinnae, and 48% of the absorbed Ca was localized in the plant cell walls.

结果表明，蜈蚣草吸收的磷主要分布在胞质组分中(平均占各部位总磷含量的44%以上)，吸收的钙主要分布在细胞壁组分中(平均占各部位总钙含量的48%以上)。

The application markets of three kinds of isoolefines(isoprene, cyclopentadiene ,piperylene) from the cracking C5 fractions and their downstream derivatives were reviewed.

着重评述了裂解C5馏分资源中3种异构烯烃(异戊二烯、环戊二烯和间戊二烯)及其下游衍生物的应用市场，并剖析了我国裂解C5资源的利用现状及应用前景。

A polarographic procedure is described for the determination of elemental sulfur in petroleum fractions and products.

提出了采用示波极谱法测定馏分油及石油产品中元素硫的方法。

Distribution Characteristics of Polycyclic Aromatic Hydrocarbons in Different Soil Organic Carbon Fractions

多环芳烃在土壤不同有机质组分中分配特征的研究

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。