Advanced Materials Research Vols. 960-961

Abstract: A new fluorescence immunoassay with high sensitivity, time-saving, good precision and reliablility was proposed for the determination of estradiol (E₂) in human urine. The complex of FITC-labeled anti-E₂ antibody was produced and regarded as a probe in this system. Ninety-six microplate was coated with ovalbumin conjugated E₂ antigen as solid phase for the immunoassay. The method parameters affecting the determination, such as the concentration of immunoreagents, pH, and other relevant variable conditions upon the immunoassay were studied and optimized systematically. Under the optimal experimental conditions, it was found that the proposed method exhibited high performance with the detection limit of 9.2 pg/mL, and the linear range of determination of 0.01-1000 ng/mL. The recoveries were 93.58-105.82% with the relative standard deviations (RSD) 5.52-7.09%. The proposed method has been used for the determination of E₂ in human urine with satisfactory results, and may be expected to find wide application in other environmental samples.

Abstract: In order to further broaden the application field of calcined bauxite, using XRF and other testing technology to study and analysis on the high temperature performance of calcined bauxite in this paper. The results showed that the sintering temperature range was 1300 ~ 1650°C, the firing line shrinkage, bulk density, bending strength, heat capacity and thermal conductivity was increased gradually, the water absorption and porosity was decreased, the water absorption, volume density and flexural strength of the sample fired at 1650°C were 0.93%, 3.20 g·cm^-3 and 182.23 MPa, the specific heat and thermal conductivity were 0.83 kJ·(kg·K)^-1 and 9.21 W·(m·K)^-1. Due to the thermal performance of calcined bauxite is optimal, and is expected to be used for the field of high temperature solar thermal heat storage material.

Abstract: The consist property analysis of Shenbei and simulation high wax crude oil was carried on in the paper. The result showed the key factor of temperature lies in the wax crystal forming and growing. only when the heating temperature is high, the wax can be fully dissolved in crude oil drop dispersed, glial, asphaltene can be fully dissolved, agent and in crude oil.

Abstract: This paper studied the produce process of carbon fiber concrete and the workability of carbon fiber conductive concrete (CFCC) by changing the fiber content as well. Based on a proper process, the electrical resistivity of CFCC in different CF continents was discussed and the percolation threshold was obtained.

Abstract: The largest gold district in China is the Jiaodong Peninsula. This study is based on chemical composition characteristics of calcite from gold deposits in Jiaodong. In this paper, a new formula was proposed to character the chemical composition characteristics of calcite in gold and silver deposits. The results showed that the chemical composition characteristics of calcite between gold and silver deposits were of great difference. And each data focused in each area. The spots of gold deposits located in the area of riched CO₂ areas. But the spots of silver deposits located in the area of riched CaO areas. The reason of these differences was mainly resulted from each different ore-forming condition.

Abstract: There are various types of structural components, which are subjected to hydrogen aggressive environment and cycling. Their unexpected failure occurs suddenly and may entail serious consequences such as emergency stop of equipment, failure of the structure etc. The special engineering models are developed to predict the crack kinetics in structure components, which are subjected both to hydrogen environment and to cycling simultaneously. These models enable estimation of structure component life. The paper considers some features of such empirically specified special model giving emphasis to the one of them, namely to the prevailing fracture mechanism transition from fatigue to hydrogen embrittlement and back in crack kinetics process.

Abstract: Extrusion process and mould design for contact finger by stamping machine is introduced in this paper. The structural design of the die is simple and practical, the productivity is improved significantly, the material consumption is reduced accordingly , the quality of products is very good and the production cost is low.

Abstract: Efficient method was proposed for the qualitative detection of 6 illegal sweeteners in commercial liquor and wine by laser Raman spectroscopy. The method was based on the comparative analysis of Raman spectrogram of pure sweeteners and alcohol samples. For the 6 kinds of sweeteners tested, saccharin sodium, acesulfame potassium impurity and cyclamate, were present as additives in the samples. The results showed that the proposed method was fast and simple with high repeatability and sensitivity, and needed little samples and cost less. Keywords: Sweeteners, Qualitative Analysis, Micro-Laser Raman, Liquor and Wine

Abstract: In order to develop flexible absorption fabric and study the effects of specifications on absorption properties, two-layer laminated fabrics were designed according to thickness matching and impedance matching. Stainless steel core-spun yarn fabrics were used as first layer which easily realized matching to the free space, Ni-Fe fiber consisted of second layer because its strong dielectric loss and magnetic loss. The reflectivity of fabrics were measured by the means of "arch testing method" in the range from 2~18 GHz. The results showed that the reflectivities of laminated fabrics can below-20 dB and the bandwidth <-10dB can reach 3.88 GHz with the change of fabric specifications.