查询词典 cation

Mechanism of rearrangement of semipinacone and cycloheptane cation were studied with HF method and STO-3G~* basis set.

用哈特里-福克方法、STO-3G*基组，分别对半片呐醇和环庚烷正离子的重排机理进行了从头算研究，计算了半片呐醇和环庚烷正离子重排过程中的各个状态的几何构型、零点能，同时对反应路径进行了计算。

Cationic resin was chosen to decolour the fermentation broth besides to play the role of cation exchange.

1选用732型阳离子树脂为丙酮酸发酵液的脱色剂和阳离子交换剂，把脱色和改性两道工序合并，简化了提取丙酮酸的环节，从而提高了丙酮酸的提取收率。

Biomass in the rain forest was far more than that in the plantation of 12 years,especially for the shrub layer.But the biomass of litterfall collected in the plantation was greater than that of the rain forest for the reason that Betula alnoidis defoliated in dry seasons.9 Four years observation found that soil bulk density tended to increase first, then decrease after planting trees;total soil porosity and non-capillary porosity tended to decrease and after few years they recovered to different degrees;the soil cation exchange capacity for all forest types increased;in the soil of 0-30cm depth,soil salt saturation tended to decrease;nutrient content in the soil of 0-60cm depth in the young stand tended to decline;soil effective P,effective K and N contents all tended to decrease.

山地雨林的总生物量远远大于10年生的西南桦人工林，其中灌木层的相对差别尤其巨大。94次的观测发现，人工林栽植后，土壤容重一般呈现一个先上升后下降的特点；而土壤非毛管孔隙度、土壤总孔隙度大多呈下降趋势，几年后有不同程度的恢复。

Cation group has the capability of charge neutrality and this would make oily wastewater demulsify and remove oil easily. Hydrophobic group would improve hydrophobic-oleophilic nature of the oil granule. Simultaneously, wetting reversed agent would change wetting performance of oil granule, enhance conglutination capability between air bubble and oil granule. And Frother would form bigger foam layer on the water, so it could prevnt granule with air bubble from rolling downward.Using the hydrophobic polymeric flocculant as one of ingredients for flotation agent formula, the flotation agent has good treatment effect.

浮选剂配方中的疏水性高分子絮凝剂分子链上带有的阳离子基团起到电中和作用，使含油污水易于破乳除油，而疏水基团能增强颗粒的疏水性能；润湿反转剂能改变颗粒的润湿性，增强气泡与颗粒的粘附能力；起泡剂在水面能形成强度较大的泡沫层，起阻止带气絮粒向下翻动的作用。

The polymerization reacts from the inverse emulsion . Selecting white oil as continuous medium , Span60 and TX-10 as the complex emulsifier , AM-01﹑(NH4)2S2O4 and NaHSO3 as new-type complex initiator , the copolymerization of dimethylamino ethyl acrylate methyl chloride/acrylamide was developed . The effects of the concentration of monomer﹑emulsifier and initiator﹑ temperature﹑reaction time and pH on the molecular weight﹑intrinsic viscostity﹑conversion ratio and cation degree of copolymer were studied .

以反相乳液为初始聚合体系，油酸失水山梨醇酯Span60和辛基酚聚氧乙烯醚TX-10构成复配乳化剂，白油为连续介质，AM-01、过硫酸铵和亚硫酸氢钠组成新型复合引发体系，进行丙烯酰胺/（2-甲基丙烯酰氧乙基）三甲基氯化铵的反相准微乳液共聚合，研究了单体浓度、乳化剂、反应温度、反应时间、pH等因素对聚合产品分子量、特性粘数、转化率及阳离子度的影响。

Acids with different cation were distinguishingly different in activation energy and frequency factor distribution.

因而在它们大量存在的情况下，烃源岩会呈现出低液态烃高气态烃产率特征。

The cation dyeable polyester fiber,which was developed by Do punt corporation in 1958 and commercialized in 1962 known as Dacron,is a main representative of new polyester fibers because of excellent dyeability and low cost.

阳离子可染聚酯纤维首先由美国杜邦公司于1958年研制成功，并于1962年实现商品化，商品名为达克纶，由于其优异的染色性能和低廉的染色成本，使它成为聚酯纤维新品种的主要代表。

Furthermore, we found that the polythiophene film showed a cation-sieving effect to the cations with different sizes when it was electrochemically reduced.

同样，该薄膜在n掺杂时对不同的阳离子也有筛选作用。

Objective To explore the correlation of asymptomatic bronchial hyperresponsiveness with serum specific IgE and eosinophilic cation protein.

目的 探讨无症状气道高反应性与血清特异性IgE及嗜酸细胞阳离子蛋白的相关性。

Two novel A-it-A' type benzothiazole-based derivatives with benzothiazolyl, phenyl-acetyl or pyridine cation groups as π electron acceptor, diethenylphenyl as π conjugated bridge: 4-(2-benzothiazolyl) ethenylchalcone (1) and 4-{4-[2-(benzothiazole-2-yl) ethenyl] styryl}-N-methylpyridinium iodide (2) were synthesized.

以苯并噻唑、苯乙酰基和吡啶阳离子为电子受体，二乙烯基苯为共扼桥，合成了两个新的A-π-A'型苯并噻唑衍生物：4-（2-苯并噻唑）－乙烯基查尔酮(1)和4-｛4-［2-乙烯基］苯乙烯基｝－N-甲基吡啶碘盐(2)。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。