查询词典 cathode ray

Nanostructured zirconia doped with yttria was prepared by co-precipitate method. The structures were characterized by X-ray diffraction and Extend X-ray absorption fine structure . The influences of calcined temperature and Y〓O〓 concentration on structure in crystallization process were studied systematically.

1利用XRD和EXAFS方法对共沉淀方法制备的非晶和纳米ZrO〓：Y〓O〓的结构进行了表征，比较系统地研究了不同处理温度和不同Y〓O〓掺杂浓度在其晶化过程中对结构的影响，并讨论了氧空位所处的位置。

The structural evolution of ultrafine NiB and NiP amorphous alloys prepared by c hemical reduction during the annealing process is investigated by X-ray absorpt ion fine structure, X-ray diffraction and differential thermal ana lysis techniques.

摘 要：采用X射线吸收精细结构，X射线衍射和差热分析等方法研究了以化学还原法制备的NiB和NiP超细非晶态合金催化剂在退火过程中的结构变化。

Methods The ovaries of rats were irradiated by 50Gy γ-ray to establish the animal model.The lumbar was got after 90 days. Dual energy X-ray absorpt metry was used to measure the bone mineral density. The changes of bone microstructure characters were observed by the scanning electron microscope. Bone biomechanical properties were determined by the maximal loading obtained from the compression test.

方法手术暴露大鼠双侧卵巢并应用50Gy的γ射线局部照射，术后90d取大鼠腰椎，DEXA测定骨密度，扫描电镜显示微结构，并行压缩实验检测腰椎最大载荷。

According to the arra ngem ent of phloem and xylem, shape of xylem and the Arranging way of xylem rays, the midrib-bundles were divided into five forms :(1) amphicribral round bundle;(2 ) pinnate-ray amphicribral reniform bundle;(3) fan-ray amphicribral reniform b undle;(4) almost-amphicribral bundle;(5) collateral bundle.

根据中脉维管束结构特点：木质部与韧皮部的位置，木质部的形状，木射线排列的方式，可分为5个类型：（1）圆形周韧维管束；（2）羽线肾形周韧维管束；（3）扇线肾形周韧维管束；（4）近周韧维管束；（5）下韧维管束。

Methods Respectively analyzed the X-ray, CT and image post-processing manifestations of mucopolysaccharidosis type Ⅰ. Results Mucopolysaccharidosis typeⅠ had characteristic X-ray changes of bones:①Enlarged skull and hook- shape Sella Turcica;②Short and thick phalanges and metacarpal Bones;③Dilated central part and thin ends of upper and lower limb bones;④Kyphosis deformity of spine, beak-shape stick out of anteroinferior margin of Kyphosis deformity vertebra;⑤Broadening ribs as paddle shape;⑥Shallow acetabulum and enlarged Acetabular Angle;⑦Prolonged femoral neck, Coxa Vara or coxa valga.

结果 粘多糖病Ⅰ型具有较典型的骨骼X线改变，(1)头大，蝶鞍呈乙型；(2)掌指骨粗短；(3)上、下肢骨中央膨胀两端变细；(4)脊椎后凸成角，后凸椎体前下缘成鸟嘴状突出，上下椎体呈卵圆形；(5)肋骨增宽呈船桨；(6)髋臼变浅，髋臼角增大；(7)股骨颈增长，髋内翻或外翻。

The morphology and microstructure characteristics of the apertured silver doped TiO2 microtubes were characterized by means of the X-ray powder diffraction, thermal analysis, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and N2 absorption.

氮吸附的结果显示该样品具有很高的比表面积，银的修饰没有显著影响二氧化钛微管的孔结构； XRD的表征结果显示，银修饰的二氧化钛多孔微管具有良好的锐钛矿晶型； XPS的分析结果表明银以游离的金属态存在； TEM的观测结果显示，银团簇沉积于二氧化钛纳米晶粒的表面。

Meanwhile, result comes out that seven fossil samples are mostly evergreen Araucarioxylon, deciduous species prapably exists, but their fixed numbers of growing year are extraordinarily variant; Analysis of ariance indicates that, imposing ray cells, radial tracheid diameters-, the ratios of ray cells to radial tracheid diameters on distinguishing seven samples is doable as a whole, while not fitting for individuals.

经方差分析可以看出，利用射线直径、管胞直径和射线管胞比可以在总体上区分各标本，但对个别样本不适用；射线高度这一性状在各标本间差别很小，不能区分；结果认为：标本2和标本6的性状最相近，为相同的种类；标本1、4、7可能为同一属；对方差和CSDM曲线的综合分析认为，标本1、3、6的生长年限存在一定的区别，可能导致在方差分析上出现些许误差。

The signal combiner and averager (307) then averages the energy of the summed prompt ray over multiple power control groups to determine an accurate energy level for the summed prompt ray.

信号组合器与平均器（307）随即在多个功率控制分组上对已叠加的标记射线的能量进行平均运算，以便针对已叠加的标记射线确定一个精确的能量水平。

SO〓〓/M〓O〓 solid superacid was applied to the photocatalytic oxidation of organic pollutants for the first time. Porous SO〓〓/TiO〓 solid superacid catalysts with high specific surface area were prepared by sol-gel method. The photocatalytic degradation of bromomethane was used as model reaction. The influence of impregnation with H〓SO〓 solution on the structure of catalysts and their photocatalytic performance was systematically studied by using X-ray diffraction, X-ray photoelectron spectroscopy, N〓 sorption analysis applying BET method, UV-Vis diffuse reflectance spectroscopy, FTIR spectroscopy, O〓-TPD and photocatalytic activity measurement. The acidity of TiO〓-based catalysts was investigated by Hammett indicator method, NH〓-TPD and IR spectra of pyridine adsorbtion. The mechanism of superacidifing effects on photocatalytic performances such as the photocatalytic degradation rate of bromomethane, apparent kinetic constant and apparent quantum efficiency was discussed.The results indicated that SO〓〓 is combined with metal ions of TiO〓 in a chelating bidentate mode.

本文首次将SO〓〓/MxOy型固体超强酸催化剂用于光催化氧化有机污染物研究，采用溶胶-凝胶法制备了具有多孔性和大比表面结构的二氧化钛基固体超强酸光催化剂SO〓〓/TiO〓，以光催化降解溴代甲烷为模型反应，系统地研究了H〓SO〓浸渍处理对催化剂表面酸性及其气相光催化性能的影响，结合XRD、BET、XPS、FTIR、Hammett指示剂法、吡啶吸附红外光谱、NH〓-TPD、O〓-TPD、紫外可见漫反射光谱等多种表征手段，深入地讨论了超强酸化对TiO〓的改性机理，阐明了引起SO〓〓/TiO〓超强酸催化剂光催化降解溴代甲烷的转化率、表观反应速率常数和表观量子效率变化的本质原因。

Observation using transmission electron microscopy found the irreversible centripetal movement of chloroplasts in chlorotic plants, as a result occurred in three sequential events:(1) chloroplast positions changed from face position (with long axis of chloroplasts at the cell walls perpendicular to light ray) to profile position (with long axis chloroplasts near the cell walls parallel to light ray),(2) chloroplast shapes changed from long elliptical to circular,(3) chloroplasts were separated from the cell wall and moved to the center of the cell.

透射电镜观察发现失绿叶片中的叶绿体发生不可逆的向心运动，整个过程大致经历以下几个阶段：(1)叶绿体从叶绿体长轴垂直于光线转变至叶绿体长轴平行于光线；(2)叶绿体的形状从椭圆形转变为圆形；(3)叶绿体脱离细胞壁向细胞中心运动。

World War II: Battle of Saipan - Americans take Saipan.

1944年的今天，美国在塞班战役中拿下塞班岛。

When the scorner, the rejecter of truth, has become presumptuous; when the routine of work in the various money-making lines is carried on without regard to principle; when the student is eagerly seeking knowledge of everything but his Bible, Christ comes as a thief.{DA 635.3

当讥诮和拒绝真理的人，到了任意妄为时，当追求财利者罔顾按道义经营谋利时，当学人正在兢兢业业地研究各种知识，而单把圣经丢在一边时，基督要像贼一样来临。