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81.
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Semen Mikhailenko Samir Kassi Le Wang Alain Campargue 《Journal of Molecular Spectroscopy》2011,269(1):92-103
The absorption spectrum of water vapor in “natural” isotopic abundance has been recorded between 7408 and 7920 cm−1 by high sensitivity cw-cavity ring down spectroscopy (CW-CRDS). This region covers the low energy part of the 1.25 μm transparency window and corresponds to weak water absorption of the first hexad of interacting vibrational bands. The achieved sensitivity – on the order of αmin ∼ 2 × 10−10 cm−1 – has allowed one to newly measure 2028 weak transitions with intensities down to 2 × 10−29 cm/molecule at 296 K i.e. more than two orders of magnitude lower than previous observations. Three hundred and fourty-one new and corrected energy levels belonging to 26 vibrational states of H216O, H218O, H217O, and HD16O could be determined from the vibration–rotation analysis based on variational calculations by Schwenke and Partridge. The previous investigations in the studied region by Fourier Transform Spectroscopy and existing databases have been critically evaluated. The most complete list for water in the region is provided as Supplementary Material. 相似文献
83.
在TC2理论框架下,计算了在高能正负电子对撞机(LC)上,TC2动力学对味改变中性流过程e+e-→tc产生截面的修正和TC2理论预言的中性top–pionπ0t对该过程产生截面的贡献.计算结果表明:TC2理论对LC实验中tc夸克联合产生的贡献主要来自中性top-pion π0t.在TC2理论的绝大部分参数空间内,可达10-2ph.若假设LC的积分亮度为500fb-1,则每年可产生数千个tc事例.因此,将来的LC实验可作为检验TC2理论的重要工具. 相似文献
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环的左自由正规化扩张和拟Excellent扩张 总被引:1,自引:0,他引:1
本文引进了环的左自由正规化扩张和拟Excelent扩张,并将环的Excelent扩张的一些性质推广到了左自由正规化扩张和拟Excelent扩张,主要讨论了几乎Noether性,正则性,凝聚性和半遗传性. 相似文献
87.
塑料镜片材料的发展动向 总被引:1,自引:0,他引:1
概述光学塑料的基本材料,讨论塑料镜片材料的主要品种及其应用,并着重分析影响塑料镜片材料性能的主要因素及其发展趋势。 相似文献
88.
Axel Schindler Jochen Brill Norbert Fruehauf James P. Novak Zvi Yaniv 《Physica E: Low-dimensional Systems and Nanostructures》2007,37(1-2):119
We have investigated two possible fields of application for carbon nanotube (CNT) networks in flexible displays. Transparent and conductive layers of CNTs were spray coated onto glass and plastic substrates. The spectral transmission of the produced layers is almost even for all wavelengths in the visible regime. A sheet resistance of 400 Ω/□ at a transmittance of 80% was achieved.Thin-film transistors (TFT) were created on silicon wafers and glass substrates using low-density CNT networks as a semiconducting layer. The process used for device fabrication on glass substrates is fully compatible to application on plastic foils. The transistors reach on/off ratios of more than five orders of magnitude and show device charge carrier mobilities in the order of 1 cm2/Vs. These values promise an application in active matrix liquid crystal displays (AMLCD). Issues that need to be addressed are the homogeneity and reproducibility of the device properties. 相似文献
89.
Photopolymerized Cellulose Acetate/Poly(Acrylic Acid) Semi-IPN Films for Wound Dressing Applications
In this work, semi-IPN films, composed of cellulose acetate(CA) and crosslinked poly(acrylic acid), have been synthesized via benzophenone (BP) induced free radical photo-polymerization of acrylic acid (AAc) in the presence of dissolved cellulose acetate (CA) using N,N’ methylene bisacrylamise (MB) as the crosslinking agent. The mechanical properties were tested for the films having different compositions of MB, CA and AAc in the feed mixtures. The tensile strength (TS) and percent elongation (PE) were found to increase with a concentration of CA in the films, but showed decreasing trends with concentrations of CA in the films. However, with AAc content in the films, the TS increased and PE showed just the opposite trend. The film samples were also studied for water vapor and oxygen permeation studies. The water vapor transmission rate (WVTR) decreased with MB and CA contents, but showed an increasing trend with AAc contents in the films. Finally, a representative sample showed fair antibacterial and antifungal action against E. coli and Aspergillus flavus when studied using the ‘Zone of inhibition method’. 相似文献