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粉体结构
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  powder structure
     By means of TG-DTA thermoanalysis, infrared spectrum as well as XRD,TEM and Zata nanometer size distribution apparatus, research on powder structure and appearance of nanometer TiO2 was performed, which indicates that nanometer TiO2 thermotreated at 500C has a good crystallinic performance and light catalysis activity.
     以TG--DTA热分析、红外光谱及XRD、TEM、激光衍射粒度分析仪、Zata电位仪等测试手段,对纳米TiO_2的粉体结构和形貌进行了研究; 结果表明,在500℃下热处理得到的纳米TiO_2粉体结晶性能良好,光催化活性好。
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     The co-precipitation method of preparing rare earth doped YAG phosphors for transparent ceramics was discussed, NH_4HCO_3 used as precipitant. The powder structure and morphology were investigated by DTA-TG,XRD,SEM and IR spectrum analyzers .
     本文用碳酸盐共沉淀法制备出性能良好的透明Er∶YAG陶瓷粉体 ,并应用DTA TG、XRD、SEM、红外光谱等测试手段分析其粉体结构和形貌。
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  “粉体结构”译为未确定词的双语例句
     Research on the Structure and UV-Vis Spectrum of SrCe_(1-x)Yb_xO_(3-α) Powders
     SrCe_(1-x)Yb_xO_(3-α)粉体结构和紫外光谱研究
     The influences of hydrothermal conditions (including starting materials, reaction temperature and time) on crystal structure and morphologies of Bi4Ti3O12 particles, were discussed. Bi4Ti3O12 nanocrystalline particles were hydrothermally synthesized in the range of 180-230℃, for 2-12h from Bi(NO3)3·5H2, TiCl4 and NaOH solution.
     讨论了水热合成条件(原料种类、摩尔配比、反应温度和晶化时间)对水热法制备钛酸铋粉体结构和形貌的影响,以Bi(NO3)3·5H2O和TiCl4为原料,NaOH为矿化剂,在180~230℃和2~12h的水热条件下,制备出Bi4Ti3O12纳米粉体.
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     Influence of Combustion Additive on the Structure and Properties of Pr-CeO_2 Powder Prepared by Low-temperature Combustion Synthesis (LCS)
     燃烧剂对低温燃烧合成Pr-CeO_2粉体结构与性能的影响
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     The effects of high temperature solid state synthesis condition on the structure,micro-morphology,pore diameter distribution and electrochemical properties of spinel Li_4Ti_5O_ 12 for an Li_4Ti_5O_ 12 /C hybrid electrochemical capacitor were investigated by XRD,SEM,BET and charge/discharge tests.
     通过XRD,SEM,BET及电化学测试等手段研究了高温固相合成条件对尖晶石Li4Ti5O12粉体结构、形貌、孔径分布的影响及其在Li4Ti5O12/C混合电化学电容器中的电化学性能.
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     The results showed that the Pd particles on the 1-Pd/Al_2O_3 were spherical with the average particle size of 2030 nm,and the size distribution of them was very homogeneous.
     研究了活化的机理以及化学镀前后γ-Al2O3粉体结构与表面形貌的变化,结果表明通过新型化学镀方法制备出的镀钯粉体1-Pd/Al2O3中钯粒子的粒径在20~30nm,并且粒径大小分布均匀。
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     Design of silos
     料仓的设计
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     Electroless nickel plating on powders
     上的化学镀镍
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     Using AFS algebra and AFS structure, any human ordinary fuzzy concept can be represented.
     结构
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     Compared the actuality of the structure of th
     *; 结构;
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     This article is to analyse it in the structure, shortened material and language.
     (一)结构.
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  powder structure
Direct observation of the powder structure in aqueous alumina slurry was investigated using optical microscopy in the transmission mode.
      
The shear stream of the gas causes breakage of the powder structure and particles or their clusters move to the air stream with an efficiency that depends on airflow rates and air humidity.
      
Monoclinic symmetry in LaSrCu0.5Co0.5O4-z found by neutron, Guinier-and synchrotron-X-ray powder structure analysis
      
These observations are consistent with the powder structure observed by SEM.
      
The diffractometer KSN-2 placed at the 10 MW reactor VVRS-M in ?e? near Prague provides the possibility for powder structure analysis of silicates.
      
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The development of the tapetum in Pinus bungeana may be divided into five stages for the convenience of description.(1) Stage of the microspore mother cells:The organelles of the ta- petal cell,consisting of amyloplasts,Golgi vesicles,lipid bodies,and endoplasmic reticulum are abundant and prominent.(2) Stage of themeiosis h During this period the amount of rough en- doplasmic reticuum (RER),ribosomes,and Golgi vesicles is prominently increasing,in the meanwhile the Golgi vesicles move up and contact with the...

The development of the tapetum in Pinus bungeana may be divided into five stages for the convenience of description.(1) Stage of the microspore mother cells:The organelles of the ta- petal cell,consisting of amyloplasts,Golgi vesicles,lipid bodies,and endoplasmic reticulum are abundant and prominent.(2) Stage of themeiosis h During this period the amount of rough en- doplasmic reticuum (RER),ribosomes,and Golgi vesicles is prominently increasing,in the meanwhile the Golgi vesicles move up and contact with the plasmolemma and then pass over them.On the other hand,the outer tangential wall of the tapetal cell begins to be disintegrated. Then a number of sporopollenin bodies with various shape and size occur outside of the plas- molemma and move gradually into the locule of the microsporangium.In addition,there are a large number of starch grains aggregation in anelectron-dense matrix of the cytoplasm.(3) Stage of the meiosis Ⅱ:The cytoplasm of the tapetal cell has receded,and the plasmolemma has also withdrawn in some degree from tbe callose wall,even forming the embayment-like struc- ture.The pro-Ubisch body can be found in the small embayments,and was usually accompanied with a number of Golgi vesicles.It is interesting to note that the lipid bodies are gradually dec- reasing during meiosis Ⅰ and Ⅱ.On the contrary the pro-Ubisch bodies and sporopollenin bo- dies are continually aggregated outside the plasmolemma.Moreover,the volume of starch grains within the amyloplast also increases.The above fact shows that the synthesis of carbohydrate is still proceeding.At the moment the amount of endoplasmic reticulum and ribosomes has reached the peak.(4) Stage of microspore formation:The cytoplasm of the tapetal cells begins to break down and becomes vacuolated.At this stage,the various organelles are disintegrated to different degrees and the degenerative process of RER and mitochondria is rather slow.(5) Stage of bicellular pollen grain:The cytoplasm of tapetal cell breaks down almost entirely,but the RER and mitochondria can be still recognizable.And there is a prominent,acetolysis-resis- tant peritapetal membrane as well as certain sporopollenin bodies in the outer tangnential wall. During the process of meiosis of microspore mother cell,the function of the tapetal cell in Pinus bungeana may be summarized as follows:(a) The decrease of lipid bodies within cytop- lasm of the tapetal cell is accompanied by the increase of the pro-Ubisch bodies outside the plas- molemma.This phenomenon may be shown that the precursor of pro-Ubisch bodies is close re- lated to the activity of lipid bodies.As has been reported by Carniel (1967),Rowley & Erdtmen (1967) and Echlin & Godwin (t968),the lipid droplets or grey spheroidal bodies are possibly the procursors of the pro-Ubisch bodies.(b) There are a large number of Golgi vesicles in the cytoplasm of tapetal cell at this stage.It may be explained that the precursors of pro-Ubisch bodies or sporopollenin bodies resulted from the activity of lipid bodies subsequently are trans- ferred to outside the plasmolemma via the Golgi vesicles.Perhaps we could consider that these procursors of the osmiophilic materials are carried away in soluble state,then aggregated in the invaginations of the plasmolemma.(c) At the same time,the ribosomal population rises very sharply and the starch accumulation in the amyloplast reaches the peak of their activity.In view of the above situation,the synthesis of the protein and the deposition of carbohydrates are very active.Thus the amount of the pro-Ubisch and sporopollenin bodies are greatly increased during the dyad and tetrad stages in Pinus bungeana.This is the inevitable outcome of the activity of the tapetal cells.

白皮松绒毡层细胞的细胞器是十分丰富的,其中粗糙内质网、核糖体和造粉体在减数分裂过程中达到高峰。小孢子形成时,绒毡层细胞开始解体,内质网和线粒体是最后衰老的细胞器。在单核花粉形成时,处于绒毡层细胞外切向壁上的周绒毡层膜特别明显。但是,孢粉素体却主要分布在内切向壁和径向壁上。有趣的是,绒毡层细胞中的造粉体结构与壁层细胞不同。而且,脂体在二分体阶段基本消失,相反,此刻孢粉素体却在质膜外大量聚集。推测脂体的消长可能与原乌氏体和孢粉素体的形成有关。

In this paper,experimental results of the moist performance of the SX-82 1 diatomaceous-earth filtration is reported. It shows that the diatomaceous-earth-filtration-aid is somewhat compressible and the resistance in the process of filtering is time -dependent.The structur-al characteristica and the heap perfomance of the diatomaceous-earth power are detailed.

本文在实验的基础上研究了国产SX821硅藻土助滤剂的湿性能。研究结果表明SX821硅藻土助滤剂具有一定的可压缩性;过滤过程的阻力具有较明显的时效性。本文分析了硅藻土粉体的结构特性和堆积特性,对硅藻土助滤剂这种湿性能进行了论证与探讨。

Nano manganese powder is prepared by the arc plasma method using raw manganesian ore.The structure and composition of nano manganese powder is analyzed by TEM,XRD and atom absorption.Nano manganese powder is loaded on γ Al 2O 3 support by mechanical means to make the supported nano catalyst, a CO oxidation catalyst.The results that nano catalyst catalyzes CO oxidation show that the activity of the supported nano manganese catalyst is as high...

Nano manganese powder is prepared by the arc plasma method using raw manganesian ore.The structure and composition of nano manganese powder is analyzed by TEM,XRD and atom absorption.Nano manganese powder is loaded on γ Al 2O 3 support by mechanical means to make the supported nano catalyst, a CO oxidation catalyst.The results that nano catalyst catalyzes CO oxidation show that the activity of the supported nano manganese catalyst is as high as that of Pd catalyst.

以锰矿为原料,用电弧等离子体法制备纳米锰粉体。用TEM、XRD及原子吸收分析纳米锰粉体的结构和组成,用机械方法将纳米锰负载到Al2O3载体表面上,制成负载型纳米催化剂,用于催化CO氧化反应,显示出较高的催化活性。

 
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