硅的
- 与 硅的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Two special structural features of the sulfonium salt were proved to stabilize its corresponding ylide and depress the 2,3-sigma rearrangement. One is that there is a trimethylsilyl in the end of the allylic double band. This silicon atom can stabilize a α-carbon anion and the corresponding ylide. Another is that there is hydroxy group in the beta-position of sulfonium atom. The oxygen of this hydroxy group may stabilize the sulfonium cation.
为了稳定生成的烯丙基硫叶立德,并抑制它的2, 3-sigma 重排反应,在硫叶立德结构上做了两方面的考虑:一是在烯丙基双键的未端引入硅基,利用硅原子对 a -碳负离子的稳定作用来稳定烯丙基硫叶立德;二是在硫原子的 b -位引入羟基,利用羟基氧对硫正离子的作用来稳定硫叶立德。
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Based on the above research, we analyzed regional metallogenic conditions from geology, geophysics and geochemistry. Considering regional strata, some source beds with ore-bearing strata controlled apparently metallogenesis. The strata contained hydrothermal siliceous rock or siliceous albitite ether formed some favorable source beds and established substantial foundation for later diplogenetic metallogenesis e.g.
从区域地层上来看,含特殊层位的矿源层对成矿有明显的控制作用,其中含热水沉积成因的硅质岩或硅质钠长质岩的地层或形成有利的矿源岩,为后期叠生成矿奠定物质基础,或直接形成工业矿床;另外,区内黑色页岩(包括碳质板岩、碳质泥岩、碳质页岩和含碳钙质板岩等)也是很好的矿源层。
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We selected the DP-18 waterborne dispersing agent as the moist and dispersing agent of the coatings, methyl silicone oil as the antifoaming agent, and the Trimethylene glycol Phenylate as the membrane- formatting agent, their value was distinctly 0.5%, 0.4% and 1.2% of the total value.
以涂料的理化性能和耐火性能为评价指标,考察了该防火涂料中的硅丙乳液和阻燃体系的比例对防火涂料的性能的影响,确定了硅丙乳液和阻燃体系在该防火涂料的最佳比例为
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Immunocytochemistry localization shows SBP117 is mainly located at the bulliform cell in the leaf. Tissue printing study showed that SBPl 17 is mainly located at the epidermis of roots, shoots and leaves as well as in the vascular bundle of the rice roots and leaves. The distribution of SBPl 17 is coincided with the sites of Si accumulated in rice plants.
免疫细胞化学检测SBP117主要分布在水稻叶片的泡状细胞中;组织印迹法显示SBP117主要分布在水稻根茎叶的外表皮中,在根和叶的维管组织中也有分布,这与硅在水稻体内的分布是一致的,说明此蛋白参与控制硅在水稻体内的沉积。
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Three dimensional (3D) honeycomb-like porous structures made up of nanoslices of hydroxy cupric phosphate heptahydrate Cu8(PO3OH2(PO4)4·7H2O single crystals were constructed by a facile assistant surface oxidation technology. The pore size of the 3D structure ranges from hundreds of nanometers to two micrometers, and the thickness of the two dimensional (2D) nanoslices is about 50~100 nm. The wettability of the porous surfaces was transformed from superhydrophilic to superhydrophobic by chemical modification with octadecanethiol or PDES.
相对于硬脂酸修饰表面,氟硅烷修饰表面对水滴具有更低的接触角滞后和较低的黏着,这可能是因为氟硅烷比硬脂酸具有更低的表面自由能所致。2、利用酸辅助的表面氧化技术制备了由Cu8(PO3OH)2(PO4)4·7H2O单晶组成的三维蜂巢状多孔结构,孔尺寸约为几百纳米到2微米,二维的纳米片厚度为50~100 nm。
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The initial three chapters of this dissertation aim to improve the regularity of ladderlike polysiloxane through strong H-bonding template and slowly dropping half water for hydrolysis and condensation.
本论文前三章旨在利用强氢键模板作用和半水量水解同步缩合脱氯化氢的改进方法首次合成了(1)高规整性、可溶的反应性含对苯二胺有机桥基的聚氢基硅氧烷高分子,29Si-NMR 图中显示梯形主链上硅原子-Si(HO2/2峰的基线宽度△1.0 ppm,这是至今文献报道的所有梯形聚硅氧烷规整性最好的数据;采用分段去撑法成功的合成了纯无机梯形聚氢基硅氧(来源:1bABC论文网www.abclunwen.com)烷。
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And whether is it necessary to redefine the geotectonic pattern in southern China? In 1993, the authors discovered firstly the late Paleozoic radiolarian silicalite in the "Shuangqiaoshan Group", which, as we know, is a block within the ophiolitic mélange. In 1996, the authors discovered again the late Paleozoic fossils in the other rocks of "Shuangqiaoshan Group" and "Zhitang Formation" of Lower Sinian Series in the ophiolitic mélange. At the same time, the authors discovered firstly the early Paleozoic chitinozoa fossils.
因此,再次将&板溪群&是否是前震旦纪的一个变质地层单位、江南古陆是否存在以及华南大地构造格局是否需要重新厘定等问题提了出来。1993年笔者于赣东北蛇绿混杂岩带内的&双桥山群&岩块中,首次发现了含晚古生代的放射虫硅质岩。1996年又在该混杂岩带多处的&双桥山群&岩块和&下震旦统志棠组&中找到了含晚古生代的放射虫硅质岩,还首次在&登山群拔竹坑组&中发现了早古生代的几丁虫化石。
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The method adopts the following steps: after mixed, phosphorus source, silicon source, aluminum source, an organic template agent, water and a precursor of the SAPO molecular sieve are hydrothermally crystallized for at least 0.1 hour at the temperature ranging from 110 to 260 DEG C to obtain the SAPO molecular sieve; wherein, the preparation method for the precursor of the SAPO molecular sieve has the following steps:, the molar ratio is 0.03 to 0.6 R:(Si0.01 to 0.98: Al 0.01 to 0.6: P0.01 to 0.6): 2 to 500 H2O; wherein, R stands for mixture solution of raw materials which is blended by the phosphorus source, the silicon source, the aluminum source, the an organic template agent and water of the template agent;, the mixture solution of raw materials prepared in step reacts at the temperature which is at least 50 DEG C lower than the crystallization temperature for at least 0.1 hour.
本发明通过采用包括以下步骤:将磷源、硅源、铝源、有机模板剂、水和SAPO分子筛前驱体混合后在110~260℃的温度下水热晶化至少0.1小时获得SAPO分子筛;其中SAPO分子筛的前驱体的制备包括以下步骤:将摩尔配比为0.03~0.6R∶(Si0.01~0.98∶Al0.01~0.6∶P0.01~0.6)∶2~500H 2 O,式中R代表模板剂的磷源、硅源、铝源、有机模板剂和水混合成原料混合液;将步骤制备的原料混合液在低于晶化温度至少50℃的温度下反应至少0.1小时的技术方案较好地解决了该问题,可应用于含氧化合物制烯烃催化剂的制备过程。
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In this paper, active groups terminated silicane was used to react with the hydroxyls of bisphenol A epoxy resins, that introduced organic silicon without consuming epoxy groups. This modifying process improved the combining degree of the cured resin, so both the toughness and the other characters (as strength, thermal resistance) were all could be improved.
为此本论文采用国内外文献中尚未见报道的、带活性基团的有机硅来改性双酚A型环氧树脂,通过端基基团与环氧链上的羟基反应生成大键能的Si-O键的方式来引进有机硅,改性过程中不仅不消耗环氧基,并且还提高了树脂固化物的交联密度,所以既能增韧树脂,又能提高其耐热、耐冲击等各项性能。
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The low-phosphorus and low-carbon Al-Si-Mn ferroalloy is produced with aluminium and common silicomanganese in certain proportion and through adding proper amount of Ca-Ba dephosphorizing agent for high temperature dephosphorizing and decarbonizing and adding proper amount of pure aluminum and clean waste steel.
本发明按一定比例的铝、普通硅锰合金,加适量的钙、钡系脱磷剂进行高温脱磷脱碳,再根据产品成份的要求补加金属锰,加入所需的纯铝及纯净废钢,获得的低磷低碳铝硅锰铁合金的组成为:Al 5~20%,Mn 50~70%,Si 8~20%,C≤1.0%,P≤0.1%,S≤0.03%,余量为Fe。
- 推荐网络例句
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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)。
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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%。
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However, to get a true quote, you will need to provide detailed personal and financial information.
然而,要让一个真正的引用,你需要提供详细的个人和财务信息。