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51.
The galvanostatic cycling of Li(Al)-V6O13 cells in 1M LiAsF6/propylene carbonate (PC)-acetonitrile (AN) and 1M LiAsF6/PC electrolytes is reported. The discharge capacity and voltage of the Li(Al)-V6O13 cell were shown to be consistently higher than those of the corresponding Li(Al)-TiS2 cell. Discharge rates of 1.2, 2.5, 5.0 and 10.0 mA cm?2 with active material utilisations of 20 – 60% were obtained from the Li(Al)-V6O13 cell. The addition of fresh PC-AN electrolyte resulted in an improvement in cell capacity, but did not stop capacity decline on cycling. Cycle life of Li(Al)-V6O13 cells was normally less than 50 cycles. It was also found that exposure of the V6O13 electrode to moist air reduced the OCV and the discharge capacity of the cell. Short circuiting and complete discharge of the cell resulted in lower capacity and this may have been due to some degree of irreversible reduction of the V6O13. 相似文献
52.
The 46th case of known pregnancy-induced pancytopenia is reported. Pregnancy may play an etiologic role in this rare condition, but the specific mechanism is unknown. Maternal mortality is 63%, and fetal and neonatal wastage is 46%. The patient reported is a 24-year-old Oriental woman who delivered a healthy female infant. Her survival is attributed to conservative management with carefully timed packed cell and platelet transfusions. 相似文献
53.
G. B. M. Fiege W. Schade M. Palaniappan V. Ng J. C. H. Phang L. J. Balk 《Microelectronics Reliability》1999,39(6-7):937-940
Shrinking feature sizes of electronic devices are leading to an increase of the internal electrical fields resulting in an increased hot electron generation. Consequently, the investigation of the resulting electrical device degradation and breakdown mechanisms gain in significance. A powerful tool for these investigations is the photon emission microscope (PEM). A disadvantage of this technique, however, is the inability to image radiative recombination processes which are taking place underneath metallization layers. In this paper, we will show that PEM investigations from the backside overcome problems of failure localization caused by opaque metal contacts. A further scope of this work is to compare the information which is obtained by collecting the emitted light with thermal properties like failure induced hot spots inside a device. This thermal characterization is carried out with a scanning thermal microscope (SThM), which is used for the localization of failures in integrated devices and for backside measurements on thinned substrates. 相似文献
54.
Teng Choon Kho Kean Chern Fong Matthew Stocks Keith McIntosh Evan Franklin Sieu Pheng Phang Wensheng Liang Andrew Blakers 《Progress in Photovoltaics: Research and Applications》2020,28(10):1034-1044
This work presents results of a laboratory‐scale interdigitated back contact (IBC) solar cell with an independently measured efficiency of 25.0%, featuring open‐circuit voltage of 716 mV, short‐circuit current of 43.0 mA.cm−2 and fill factor of 81.0%. Notably, the high efficiency was achieved based on significant improvements resulting from the optimised cell structure, excellent SiO2‐SiNx‐SiOx (ONO) surface passivation, detailed bulk lifetime management strategy and improved random pyramid texturing. Experimental details and analysis of the individual improvements over prior work are presented in‐depth. 相似文献
55.
Roberta Schiemer David Furniss Sendy Phang Angela B. Seddon William Atiomo Ketankumar B. Gajjar 《International journal of molecular sciences》2022,23(9)
Endometrial cancer (EC) is the sixth most common cancer and the fourth leading cause of death among women worldwide. Early detection and treatment are associated with a favourable prognosis and reduction in mortality. Unlike other common cancers, however, screening strategies lack the required sensitivity, specificity and accuracy to be successfully implemented in clinical practice and current diagnostic approaches are invasive, costly and time consuming. Such limitations highlight the unmet need to develop diagnostic and screening alternatives for EC, which should be accurate, rapid, minimally invasive and cost-effective. Vibrational spectroscopic techniques, Mid-Infrared Absorption Spectroscopy and Raman, exploit the atomic vibrational absorption induced by interaction of light and a biological sample, to generate a unique spectral response: a “biochemical fingerprint”. These are non-destructive techniques and, combined with multivariate statistical analysis, have been shown over the last decade to provide discrimination between cancerous and healthy samples, demonstrating a promising role in both cancer screening and diagnosis. The aim of this review is to collate available evidence, in order to provide insight into the present status of the application of vibrational biospectroscopy in endometrial cancer diagnosis and screening, and to assess future prospects. 相似文献
56.
Elizabeth A. Mickler Huaxin Zhou Tzu L. Phang Mark W. Geraci Robert S. Stearman Catherine R. Sears 《International journal of molecular sciences》2021,22(21)
Defining detailed genomic characterization of early tumor progression is critical to identifying key regulators and pathways in carcinogenesis as potentially druggable targets. In human lung cancer, work to characterize early cancer development has mainly focused on squamous cancer, as the earliest lesions are more proximal in the airways and often accessible by repeated bronchoscopy. Adenocarcinomas are typically located distally in the lung, limiting accessibility for biopsy of pre-malignant and early stages. Mouse lung cancer models recapitulate many human genomic features and provide a model for tumorigenesis with pre-malignant atypical adenomatous hyperplasia and in situ adenocarcinomas often developing contemporaneously within the same animal. Here, we combined tissue characterization and collection by laser capture microscopy (LCM) with digital droplet PCR (ddPCR) and low-coverage whole genome sequencing (LC-WGS). ddPCR can be used to identify specific missense mutations in Kras (Kirsten rat sarcoma viral oncogene homolog, here focused on Kras Q61) and estimate the percentage of mutation predominance. LC-WGS is a cost-effective method to infer localized copy number alterations (CNAs) across the genome using low-input DNA. Combining these methods, the histological stage of lung cancer can be correlated with appearance of Kras mutations and CNAs. The utility of this approach is adaptable to other mouse models of human cancer. 相似文献
57.
Xiaofeng He Jun Yang Lianchao Zhu Biao Wang Guangping Sun Pengfei Lv In Yee Phang Tianxi Liu 《应用聚合物科学杂志》2006,102(1):542-549
Nylon 11 (PA11)/clay nanocomposites have been prepared by melt‐blending, followed by melt‐extrusion through a capillary. Transmission electron microscopy shows that the exfoliated clay morphology is dominant for low nanofiller content, while the intercalated one is prevailing for high filler loading. Melt rheological properties of PA11 nanocomposites have been studied in both linear and nonlinear viscoelastic response regions. In the linear regime, the nanocomposites exhibit much higher storage modulus (G′) and loss modulus (G″) values than neat PA11. The values of G′ and G″ increase steadily with clay loading at low concentrations, while the G′ and G″ for the sample with 5 wt % clay show an inverse dependence and lie between the modulus values of the samples with 1 and 2 wt % of clay. This is attributed to the alignment/orientation of nanoclay platelets in the intercalated nanocomposite induced by capillary extrusion. In the nonlinear regime, the nanocomposites show increased shear viscosities when compared with the neat resin. The dependence of the shear viscosity on clay loading has analogous trend to that of G′ and G″. Finally, a comparison has been made between the complex and steady viscosities to verify the applicability of the empirical Cox‐Merz rule. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 542–549, 2006 相似文献
58.
59.
Xuemei Han Lucas V. Besteiro Charlynn Sher Lin Koh Hiang Kwee Lee In Yee Phang Gia Chuong Phan-Quang Jing Yi Ng Howard Yi Fan Sim Chee Leng Lay Alexander Govorov Xing Yi Ling 《Advanced functional materials》2021,31(13):2008904
Photothermal materials are crucial for diverse heating applications, but it remains challenging to achieve high energy conversion efficiency due to the difficulty to concurrently improve light absorbance and suppress heat loss. Herein, a zeolitic imidazolate framework-isolated graphene (G@ZIF) nanohybrid is demonstrated that utilizes ultrathin, heat-insulating ZIF layers, and G@ZIF interfacial nanocavity to synergistically intensify light absorbance and heat localization. Under artificial sunlight illumination (≈1 kW m−2), the G@ZIF film attains a maximum temperature of 120 °C in an open environment with a 98% solar-to-thermal conversion efficiency. Importantly, the porous ZIF layer allows small molecules/media to enter and access the embedded hot graphene surface for targeted heat transfer in practical applications. As a proof-of-concept, the G@ZIF-based steam generator realizes 96% energy conversion from light to vapor with near-perfect desalination and water purification efficiencies (>99.9%). This design is generic and can be extended to other photothermal systems for advanced solar-thermal applications, including catalysis, water treatments, sterilization, and mechanical actuation. 相似文献
60.
植物油厂废水处理工艺及设备的研究 总被引：5，自引：0，他引：5
论述了植物油厂的废水来源和废水处理的工艺效果，分析和研究了主要废水处理设备的结构，工作原理和效果。 相似文献