查询词典 powders

The sheeted iron-based catalyst was made by powder metallurgy using pure form metallic powders as stuff.

以单质金属粉为原料，采用粉末冶金方法制备了片状铁基触媒，并借鉴目前金刚石工业中最为常用的粉末触媒组装方式及合成工艺在高温高压下进行了金刚石合成试验。

Submicron silicon carbide powders were synthesized via the vapor phase reaction of tetramethyl silicane induced by TEA CO2 laser.

用TEA CO_2激光诱导四甲基硅烷的气相反应，合成了亚微米碳化硅粉末，工作气压为30～300torr(4-40×10~2Pa)，激光功率密度为10~3W/cm~2量级。

XRD measurements indicated that the product powders are mainly the skutterudite with the cell parameter α=7. 768-7. 803〓. From the ED patterns of the whiskers and nanowires, we can find that the whiskers and nanowires are single crystals.

采用自行设计的水热-还原-合金化的方法以白磷、氢氧化钠和三氯化铁为原料分别在200-240℃和160-180℃制备了直径为0.5-4μm长径比为10-20的Na〓Fe〓P〓晶须材料和直径是20-80nm长度是500-4000nm的NaFe〓P〓纳米棒。

And to a kid like me, she knew everything. She had all kinds of powders and colored liquids in her room, and when she mixed them up and we slugged them down, no one ever got sick.

像我一样爱开玩笑，她知道所有的事情，在她的房间里有各种粉末和彩色液体，当她把他们混合在一起时，我们把它地甩在地上，没有人得病了。

For further understanding the effect of the strain on K-bearing silicate mineral, an experiment with KO2 strain cultured in nitrogen-containing and nitrogen-free medium was conducted. By putting mineral powders into the medium and measuring the concentration of capsular polysaccharides, we concluded that the strain can accelerate the weathering rate of silicate minerals. The results showed that the polysaccharides secreted by the strain in the growth process could help the bacterial to adhere to the mineral surface effectively, and created the bacterium-mineral complex, which formed a mircro-enviorment avail the release of potassium. Another result was that there was higher level of Carbonic Anhydrase activity, which revealed that some exo-protein or enzyme produced by the bacterial had postive impact on the process of releasing potassium ion. We carried out the bacterial fermentation for larger scale production of the bacterial secretion, which was used to sperate, and identify the small molecules related to the mineral-bacterial interaction. After the analysis, it was found that the strain can produce many kinds of small molecules, such as 2-Hydroxybenzoic acid, 4-Hydroxyphenylacetic acid, methyl-4-hydroxybenzoate, etc.

分别将菌株接入含有不同矿粉的培养基中培养，检测其在有氮、无氮培养基中荚膜多糖含量的变化，并在以钾长石和黑云母为矿源的情况下，比较研究了菌株在有氮、无氮培养基中对矿物的风化能力，通过一系列的实验，证实胶质芽孢杆菌在生长过程中所分泌的粘稠胞外聚糖可帮助细菌有效黏附在矿物表面，形成细菌-矿物复合体，并改变及维持该复合体内部的微环境，有助于该菌的解钾作用，而且细菌分泌的胞外蛋白质在该菌对含钾硅酸盐矿物的解钾作用过程中发挥重要作用；将胶质芽孢杆菌接入以钾长石和黑云母为矿源的有氮、无氮培养基中培养，检测到该菌碳酸酐酶活性的变化，并进行批量发酵后小分子酸性分泌产物的提取、分离、纯化与鉴定等方面的研究，结果表明，该菌可产生2-羟基苯甲酸，4-羟基苯乙酸，4-羟基苯甲酸甲酯等小分子物质。

The powders all have different proportional elements containing O, F, Al, Si and Ca. They all have amorphous structures and are constituted by near spheroidic nano particles whose size is in the range of 30~70 nm.

各粉体均含有不同比例的O、F、Al、Si、Ca元素，且均为非晶态的近球形纳米颗粒，粒子直径大约在30~70 nm范围。

The powders all have different proportional elements containing O,F,Al,Si and Ca.They all have amorphous structures and are constituted by near spheroidic nano particles whose size is in the range of 30~70 nm.

文献[4]指出，细化玻璃粉体是改善固结组织与牙齿黏结状态的有效途径之一；然而该类玻璃材料传统多采用熔融→快冷→粉碎的物理法制备，制备方法复杂，产品颗粒粗大。

The adhesion and flowability of powders are measured by tamping vibration .

阐述了由振实法测定的粉末的粘着力和流动性。

Taking 2,4,6-triaminopyrinide as triamine monomer, polyimide foams with cross-linked structures were prepared by foaming poly precursor powders.

以2，4，6-三氨基嘧啶为三胺单体，经由聚酯铵盐前体粉末发泡合成了具有交联结构的聚酰亚胺泡沫。

The nano ZnO powders are prepared by citric acid and triammonium citrate by sol-gel method.

以柠檬酸和柠檬酸三铵为络合剂，利用溶胶－凝胶法制备ZnO微粉。

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％。