[en] The adsorption of two polymers (polydimethylacrylamide and polydiethylacrylamide) on the inner surface of a fused silica of capillary (or wafer) was investigated by means of atomic force microscopy (AFM), multi-angle laser light scattering (MALLS) technique, and by measuring the electroosmotic flow (EOF) and contact angle. The AFM images showed that PDMA and PDEA tightly adsorbed on the fused silica surface and formed stable coatings. The contact angle data demonstrated that the polymer-adsorbed coatings have different hydrophobicities, which are related to the structures of the polymers. The adsorbing capability and stability of the adsorption coating, perhaps, were mainly dependent on the hydrogen bond force between oxygen atom on the carbonyl group of polymers and the hydroxyl group of the silica surface, and the hydrophobic nature of polymers. Our data also illustrated that the polymer-adsorbed coatings efficiently suppressed the EOF and the adsorption of DNA fragments on the capillary surface. These polymers were successfully used as sieving media in capillary electrophoresis of DNA fragments and detection of single point mutation of C677T from human methylenetetrahydrofolate reductase (MTHFR) gene

No abstract available

[en] The reversed-field pinch (RFP) configuration has been studied for the case of finite beta. Suydam's condition and the sufficient criterion have been used to examine this configuration. Results of numerical calculations show that the critical value of the pinch parameter Θ for the appearance of the reverse toroidal field increases as the β-value increases. The critical value of Θ for the helical state increases with β as well. Suydam's and Robinson's stability regions increase and shift towards higher values of Θ with increasing β. Theoretical results for finite β coincide with recent RFP experimental results

[en] A new ceramic composite (Zr_0_._9_2Y_0_._0_8)O_1_._9_6 dispersed in LaTi_2Al_9O_1_9 as a thermal barrier material was synthesized by the hybrid sol–gel method. The composite ceramic has good thermochemical stability up to 1500 °C. The thermal conductivity of composite ceramic is circa. 1.0 W/m·K at ambient temperature and the coefficients of thermal expansion are very stable and comparable to (Zr_0_._9_2Y_0_._0_8)O_1_._9_6 about 10.7 × 10"−"6 K"−"1 at 1223 K. The sintering resistance and mechanical properties become better after being dispersed. Therefore, the new ceramic composite synthesized by hybrid sol–gel method can be a promising candidate as a thermal barrier material on Ni-based superalloy. - Highlights: • New composite 4 mol% yttria stabilized zirconia (4YSZ) dispersed LaTi_2Al_9O_1_9 (LTA) is synthesized by a hybrid sol-gel method. • The new ceramic composite shows good thermochemical stability up to 1500"oC. • The thermal conductivity of the new ceramic composite is lower than each component at ambient temperature. • The coefficient of thermal expansion of 4YSZ dispersed in LTA (LTA-4YSZ) is comparable to 4YSZ. • Compared with LTA and 4YSZ, LTA-4YSZ has the best sintering resistance. • The Young’s Modulus of LTA-4YSZ composite becomes lower while the hardness becomes higher.

[en] The evolution of configuration from an initial state of tokamak-like plasma to RFP (reversed field pinch) along the trajectory of minimum energy state is studied. the high plasma current allowed in a RFP is expected to be sufficient to heat the plasma to ignition without the need of auxiliary neutral-beam or radio-frequency heating

[en] An analyic solution of the force-free equation for a toroidal configuration of rectangular cross section is presented. It is shown that the critical value of contraction ratio for the appearance of a reversed field as well as of the ohmic current increases as the elongation of the cross section increases

[en] With technology development, the current installed capacity of nuclear power plants keeps growing. In order to give full play to the availability of main high-performance equipment and improve the plant power factor, the signals for protection, monitor and control are strictly required on reliability, stability, and accuracy. These features are the basic requirements of signals which are mainly form the local measurement instruments. In this paper, according to the local transmitter maintenance experience of Qinshan Nuclear Power Co., Ltd., the paper is talking about the management and improvement of local instrument devices, and focus on analysis of measurement principles, history status, and possible causes of the incident. (author)

[en] The reversed field pinch configuration has been studied in case of finite beta. Suydam's condition and the sufficient stability criterion have been used to examine this configuration. The results of numerical calculations shows that the critical value of the appearance of the reverse toroidal field increases as the β-value increases. The critical helical state of relaxation increases with β as well. Suydam's and Robinson's stability regions shifts towards the region in which Θ increases with the β values. The theoretical results with finite β coincides with recent RFP'S experimental results

[en] The evolution of configuration from an initial state of a tokamak-like plasma to RFP along the trajectory of minimum energy state is studied. The high plasma current allowed in a RFP is expected to be sufficient to heat the plasma to ignition without the need of auxiliary neutral-beam or radio-frequency heating

[en] The reversed field pinch (RFP) configuration has been studied for the case of finite beta. Suydam's condition and the sufficient criterion have been used to examine this configuration. Results of numerical calculations show that the critical value of the pinch parameter Θ for the appearance of the reverse toroidal field increases as the β-value increases. The critical value of Θ for helical state increases with β as well. Suydam's and Robinson's stability regions increase and shift towards higher value of Θ with increasing β. Theoretical results for finite β are in good agreement with recent RFP experimental results