查询词典 surface area

By means of SEM, specific surface area, micro-structure of bamboo charcoal, specific surface area and characteristics of pores are observed and analyzed, with emphasis on formation of micropore, and development laws.

采用扫描电子显微镜观察，比表面积分析仪等，对竹炭的微观结构、比表面积与孔隙特征等进行了观察与表征，研究了不同最终温度炭化条件下竹炭孔隙的形成与发展规律。

A new idea for specific surface area standard reference materials which are made of nonporous mono-disperse SiO2 spheres and the true specific surface area can be calculated accurately from their diameters is presented.

提出一种新型比表面积标准物质的研究思路，即用无孔的单分散SiO2微球作为比表面积标准物质的材料，它的"真实"比表面积可以通过对其粒径的准确测量，用几何的方法计算出来。

Using shape function andclassical interior ballistics theory, the influence relation of the PSS model parameter affectto splitting opportunity, increasing burning surface and interior ballistics characteristicswas researched.The splitting opportunity of PSS appears ahead the academic intending, thereason is that the thickness of outside burning layer is asymmetry, the thinner area splitsearlier, and the thicker area splits later, consequently, the PSS put up progressivity burningeffect. From the practical look, the burning progressivity effect is more profitable than thatincreasing burning surface suddenly.

采用形状函数和经典内弹道理论，研究了PSS发射药的药型参数对分裂时机、燃烧增面性和内弹道性能的影响关系，PSS发射药的分裂时机比理论预计值提前出现，原因是外侧面的燃烧层厚度不均匀，薄的地方先分裂，厚的地方晚分裂，从而表现出了渐增性的燃烧效果，从应用的角度出发，渐增性燃烧的效果比突增的效果要好。

Through reiterative study over years by the author,a new principle to express the relation between aggregate particles size and the surface area was proposed,that is the specific granularity,which could solve the problem of lack of correlation of fineness modulus to the specific surface area of the sand.

经多年反复研究，发现了集料粒度与表面积关系法则，提出了以"比粒度"表述砂石粒度的新方法，解决了以"细度模数"表述砂子细度的不足之处，即解决了细度模数与不同细度砂子的比表面积没有相关性的问题

Finally the fertilizer specific surface area is obtained according to spheroid surface area formula finally.

这一比表面积的测定方法可以方便地应用于控释肥料研制过程计算包膜的厚度和膜材的用量。

Then, the equation of quantitative structure-activity relationship was effectively established with four descriptors like the molecular volume V(subscript m, order zero chi index, sum of the product of solvent-accessible surface area multiplied by partial charge for all positively charged atoms (Jurs-PPSA-3), and molecular surface area.

QSAR方程含分子体积V、分子分支度指数CHI-0、分子中带正电荷原子的溶剂可积面积与其所带电荷之积的加和值Jurs-PPSA-3以及分子表面积S4个结构描述符。

If the specific surface area (0.3391 m2/g) of non-modified tea extracted residual was set as 1, the specific surface area of 9 adsorbents, modified with optimized condition, will be 24.7 thiocarbamide plus phosphorylation (1, 12.2 phosphorylation (1, 6.7, 6.5 phosphorylation (2, 6.1 (sodium thiosulfate modification), 5.9 formaldehyde (1, 5.8 formaldehyde (2, 5.4, and 4.9.

设未经修饰过茶叶渣比表面积(0.3391 m2/g)之相对比值为1，其余九种化学修饰化法制备之吸附剂比表面积相对比值分别为硫脲加磷酸化修饰处理法24.7，磷酸化修饰处理法 12.2，磷酸化修饰处理法 6.7，硫脲提升纤维素架桥作用6.5，硫代硫酸钠修饰处理法6.1，甲醛修饰处理法 5.9，甲醛修饰处理法 5.8，醋酸修饰处理法5.4，柠檬酸修饰处理法4.9。

We used wood tar as a blending agent to produce shaped activated carbon and the abrasion resistance of it is larger than 85%; the BET surface area is 1577.55m2/g. The abrasion resistance of unshaped activated carbon is 80% and BET surface area is 1789.87m2/g. The ash contents of powdered activated carbon, and unshaped activated carbon prepared by physical method are less than 0.2%; the iodine number is 1200 mg/g; the maximum 0.15% methylene blue adsorption value is 18ml/0.1g.

其中定型颗粒活性炭是用木焦油为粘合剂，最终产品的强度在85％以上，比表面积为1577.55m~2／g；实验中所制备的不定型颗粒活性炭和粉状活性炭的灰分含量不超过0.2％；碘吸附值达到1200mg／g；亚甲基蓝最高吸附值为18.0ml／0.1g。

Adhesive forces and contact area between arolium and the target surface were measured when Lycorma delicatula walked on the level and slided on the vertical surface. A model of peeling theory was put forward to give relationship between contact area and adhesive forces.

测量了斑衣蜡蝉在切向和法向两种状态下的抓附力以及在切向和法向两种状态下抓附时中垫与接触面的接触面积，分析了接触面积和力的关系。

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明，MAO不仅仅只和乙醇作用，MAO还与MgCl_2本身有一定的作用，这是一个极为重要的发现；3、通过ICP和EDX表征，发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布；4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能，特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化，并且催化剂寿命长，表现出稳定的动力学行为，最终获得了高堆密度(大于0.35g／ml)的球形聚乙烯颗粒；5、本文选择MSPC-5为研究对象，考察了聚合反应参数对催化剂的活性及其聚合物的影响，研究发现：不同的烷基铝对催化剂具有非常重要的影响，特别足TIBA对MSPC-5的助催化活性最高，烷基铝的加入量有一个较佳值，聚合温度为80度时活性最高，H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小；、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨，制备出了一种的新型的氯化镁载体，并将该载体用于多种单活性中心催化剂的负载化研究，研究表明：1、通过BET、XRD的表征，再次证实了MAO与MgCl_2之间具有直接作用，与XPS的研究结果相一致；2、当研磨时间高于12小时时，延长研磨时间对载体的结构没有显著的影响；3、将配合物3负载于共研磨时间不同的一系列载体上，乙烯聚合结果表明，尽管共研磨时间对负载催化剂的活性具有明显的影响，但是它对聚合物的性能以及催化剂的影响不明显。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。