Identification of BaO. A12O3.5TiO2 in the Ternary System BaO. A12O3-TiO2

A new identification and indexing for the phase BaAl₂Ti₅O₁₄ were accomplished using an X-ray diffraction technique. The new lattice parameters for the tetragonal lattice structure are: a₀=9.990 × 10^-10 m and c₀=12.264 × 10^-10 m, with a corresponding volume 1.224 × 10^-27 m³. The data provided by the Joint Committee on Powder Diffraction Standards are inconsistent both in lattice parameter values and Miller indices. The X-ray powder diffraction pattern of BaAl₂Ti₅O₁₄ was indexed using the LSUCR (least-squares unit cell refinement) computer program.     

Visualization and quantification of water movement in porous cement-based materials by real time thermal neutron radiography:Theoretical analysis and experimental study

Water movement in porous cement-based materials is of great importance when studying their deterioration processes and durability.Many traditional methods based on mass changes,electricity or nuclear magnetic resonances are available for studying water transport in cement-based materials.In this research,an advanced technique i.e.thermal neutron radiography was utilized to achieve visualization and quantification of time dependent water movement including water penetration and moisture vapor in porous cemen...     

Thermogravimetry/Differential Thermal Analysis and Phase Identification of Cs2O·Al2O3·2TiO2 in the Ternary System Cs2O-A12O3-TiO2

Thermogravimetry and differential thermal analyses were conducted on the mixture 2CsNO₃+A1₂O₃+2TiO₂ up to 1530 K. The resultant phase was identified as orthorhombic Cs₂Al₂Ti₂O₈ with lattice parameters a_O=0.996, b₀=0.898, and c_o=0.573 nm. Simultaneous TG/DTA was performed to quantify weight loss and volatilization of cesium and to monitor the development and/or stability of the phase as a function of temperature.     

Current Status of Education of Deseriptive Geometry in Europe

In this paper the importance of eometry?and raphics?for the advancement of science and knowledge in 19th century is pointed out. Klein and Müller reform of geometry syllabus in 19th century and the education situation of Geometry and Graphics in Europe during the last third of 20th century are introduced. The problems of geometry and graphics education during the next decedes and six proposals are presented.     

Combining Contactless Inductive Flow Tomography and Mutual Inductance Tomography for Two-Phase Flow Measurements at a Continuous Casting Model

The flow structure in the mould of a continuous caster is of key importance for the quality of the final product.The use of most conventional flow measurement techniques is prevented by the high temperature of the liquid steel.For a downscaled physical model of the continuous casting process,we present combined measurements of the flow in the mould by Contacfless Inductive Flow Tomography(CIFT),and of the conductivity distribution in the submerged entry nozzle by Mutual Inductance Tomograpliy(MIT).In addition,we summarize an experiment with a magnetic stirrer around the submerged entry nozzle and its effects on the flow in the mould.Some new developments towards a robust implementation of CIFT at a real caster,including the use of pickup coils and gradiometric probes,are also discussed.     

一种克服电磁流量计中交直流干扰的方法

】用方波磁场和内插法不仅可以有效地消除交流磁场法电磁流量计中的变压器交流干扰电压,而且可以有效地减小直流磁场法电磁流量计中的电化学直流干扰电压及其变化的影响,从而使电磁流量计的测量精度大大提高。     

利用酵母双杂交体系筛选拟南芥ABA信号新元件

酵母双杂交体系是用活体研究蛋白质间相互作用的有效途径.利用这一体系,从拟南芥的一cDNA表达文库中筛选出了与同源框蛋白AtHB6有相互作用的两蛋白质AtHB7和AtGluRS,提示这两个蛋白有可能是脱落酸(ABA)信号传导途径中的新元件.