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100 ℃将其溶解制备成均匀的玻璃片. (2) 使用日本岛津公司的XRF-1500型X线荧光光谱仪对玻璃片主成分进行测试.实验分析误差低 于5%. 2.4 TOC含量的测定 TOC含量采用High TOC Ⅱ分析仪测定.测量时,将每个粉末样品分成2份,即总碳(TC)样和无机碳(TIC)样.同时测量样品的TC和TIC含量,两者之差就是有机碳(TOC)的含量.High... R F, Gerringga L J A. Fe(Ⅲ) speciation in the high nutrient, low chlorophyll Pacificregion of the Southern Ocean[J]. Marine Chemistry, 1998, 62(4): 335-352. [26] Rue E L, Bruland K W. The role......
-juan, ZHOU Rong-qi. Study on purifying high purity citral from lisea cubeba oil[J]. Flavour Fragrance Cosmetics, 2002, 73(4): 13-16. [6] Choi E M, Hwang J K. Effects of methanolic extract... via acid catalysis[J]. Trans Am Soc Agric Eng, 1999, 42(5): 1203-10. [10] Canakci M, van Gerpan J. BD production from oils and fats with high free fatty acids[J]. Trans ASAE, 2001, 44(4): 1429-1436......
of roadbed of high speed railway[J]. Journal of The China Railway Society, 1995, 17(1): 66-75. [6] 卿启湘. 高速铁路无碴轨道-软岩路基系统动力特性研究[D]. 长沙: 中南大学土木建筑学院, 2005. QING Qi-xiang. Study on dynamical characteristics in soft zone for ballastless tracks on high speed railway[D]. Changsha: School of Civil and Architectural Engineering, Central South University, 2005. [7] 蔡成标, 翟婉明, 赵铁军, 等. 列车通过路桥过渡段时的动力作用研究[J]. 交通运输工......
系统最低性能要求及测量方法[S].GB/T 7313-1987, Minimum performance requirements and methods of measurement for high fidelity loud speaker systems [S]. [4] SJ/T 10406-1993, 声频功率放大器通用技术条件[S].SJ/T 10406-1993, General...的宽带化和高速化[J]. 电声技术, 2006(5): 37-40. WANG Feng-shuo. Quickening response and widening frequency band in the design of high-fidelity power amplifier[J]. Audio Engineering, 2006(5): 37-40. [7] 张平柯. 高频开关......
phases, and the difficulties in conducting experiments at high temperatures, etc, the phase equilibria in ZrO2-included systems have been proved to be difficult to determine with certainty. Since only... at (2 978±10) K, and Ba2ZrO4 decomposed peritectically at about 2 600 K. The present work was mainly based on these experimental data to set up the liquidus equilibria, on the grounds that the high......
of engineering purposes. The evaluation and enhancement of the mechanical reliability of these inhomogeneous structures have emerged as high priority that subjects to both the materials science... and the steel substrate at the plastically instable point. By substituting Eqns.(9) and (10) into Eqn.(8), omitting high order small quantity, we can obtain  ......
density suitable for the high power electric appliances, many carbon felt electrodes have been increasingly widely used in VRB. Carbon felt is a common porous electrode with a larger surface area... can be increased by 12%. The mass change of the PB modified Pt crystal electrode in the process of the potential scan is obvious. The reaction of substitution of VO2+ for high-spin Fe ion in PB......
) process, is a widespread environmental problem. Due to the use of sulfuric acid as an extractant in the operation, the polluted groundwater is generally characterized by very low pH, high levels... was taken out and dried naturally for the subsequent column reactor experiment. Similarly, the two aforementioned PVC columns’ top and bottom were filled with 8 cm high gravel (diameter of 2-4 mm......
displacements for both soil types increase with increasing the lateral load and the time factor, respectively. Also the differences in displacements with time factor are observed more clearly at high... increases from low to high magnitude. Higher values of pressures with time occurred near the tip of pile and observed at high intensity loading in both types of soil. The frictional stress begins from......
pH in the synthesis of conducting PANI, and natural enzymes are expensive. Therefore, it is necessary to develop a cheap, high efficient and stable mimetic enzyme catalyst to replace the native enzyme...-catalyzed PANI synthesis is carried out with SDS to improve solubility and process ability of the conducting polymer. (2) FeTSPc, as a mimetic enzyme for the synthesis of PANI, is inspired by its high......