微米

Keywords: water-soluble polymer;microscale ball; friction chemistry

中文关键词：水溶性聚合物；微米级滚珠；摩擦化学

The results show that increasing gelatin concentration, enhancing emulsion and using mixed emulsifier can decrease the gelatin submicron particle diameter using glutaraldehyde as cross-linking agent.

结果表明，采用戊二醛为固化剂、增加明胶的浓度、提高乳化搅拌速度、使用混合性的乳化剂都有利于降低明胶粒子的粒径此外，对制备工艺进行了优化，并在7000r/min左右高速搅拌的条件下，得到了成球性较好的粒径约为450 nm的明胶亚微米粒子。

The results show that α-Al2O3 in the two kind s of coatings decreases while the γ-Al2O3 increases after spraying. Rutile-TiO2 transforms to brookite-TiO2 and the inners tress of coating was increased so as to aggravate the expansion of cracking. The pores are small but dense in the conventional coating while bigger but loose in the nano-structured coating. The pores in the nano-structured coating exist almost inside the partially melted region. The pores generated during spraying and the cracks generated during the course of thermal oxidization because of thermal stress are the direct reasons why coatings fail.

结果表明：2种粉末在喷涂之后，涂层中的α-A12O3均有所减少，生成了γ-Al2O3，金红石TiO2相转变成了板钛矿型TiO2相，增加了涂层的内应力，加剧了裂纹的扩展；常规微米涂层中的孔洞细小但密集，纳米涂层中的孔洞较大但不密集，且大部分的气孔都存在于部分熔化区的内部；涂层在喷涂过程中所生成的气孔以及热氧化过程中由于热应力而产生的裂纹是造成涂层失效的直接原因。

With only iron carbide and without graphite in the stock, we have got diamond crystal with size of several micrometers under temperature of 1700K and pressure 5. 5GPa in 8 minute.

在没有石墨碳源存在的情况下，以高温常压条件下制备的碳含量为4.33％的铁碳化合物为原料，在温度1700 K和压力5.5 GPa条件下，8分钟的合成时间得到了微米级尺寸的金刚石颗粒。

There are some microtubular and spiral goethites scattered among the iron hydroxide colloidal cloud and submicrometer-size colloidal particles.

电子显微分析观察到在非晶质氢氧化铁凝胶团和亚微米级微粒聚集体中存在特殊的显微管状和螺旋状针铁矿，显示出明显的生物矿化特征。

He says the sail will consist of up to 100 aluminum or copper alloy wires—each about 12.4 miles, or 20 kilometers, long and 20 microns in diameter (one micron equals about one four hundred-thousandths of an inch)—attached to reels that can adjust wire length. Each wire would be charged at up to 20 kilovolts via a solar-powered electron gun attached to the sail.

据Janhunen介绍，这种空间帆由多达100根铝或铜合金线组成——每根大概12.4英里（20公里）长，直径为20微米，这些线都绕在一个轮轴上因此可以调节线的长度。

Specialized for natural gas, coal gas, liquified petroleum gas, chemical profession and so on necessary production filter, may make 5 ~ 140 microns various files to filter the precision the filter element product .

专业为天然气、煤气、液化石油气、化工行业等配套生产滤清器，可以制造 5 ～ 140 微米各档过滤精度的滤芯产品。

RESULTS: The diameter of the microsphere was under 20 μm. Scanning electron microscope demonstrated that Fe3O4 and berberine were compounded by gel into a round shape, and the mixture was expressed on micrometer.

结果：磁性药物微球的颗粒直径在20 μm以下，通过扫描电镜可以看出，Fe3O4粒子和小檗碱已经被明胶复合成堆积状的球体，达到微米级。

Field emission scanning electron microscopy shows the diameter of Bi2Sr2CaCu2Oy nanowires is nearly 20 nm and the length is up to 1 μm. High-resolution transmission electron microscopy also shows the configuration of the polycrystalline nanowires with average diameters of 20nm.

利用场发射扫描式电子显微镜及高解析度穿透式电子显微镜来观察奈米线的外观及结构，奈米线的粗细约为20奈米，长度约为1微米，为多晶结构。

At the same time the shock pressure and temperature were measured in the microsized and nanosized powders with large porosities (porosity m=0.412～0.655) by manganin gauges and thermal couple, respectively.

同时利用锰铜计和热电偶对高孔隙率（孔隙率m=0.412～0.655）的微米级和纳米级粉末进行了冲击波压力和温度的测量。

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％。