164,488 research outputs found
Nanoimprint lithography for planar chiral photonic meta-materials
No full textRoom temperature nanoimprint lithography has successfully been applied to the fabrication of planar chiral photonic meta-materials. For dielectric chiral structures a single layer of thick HSQ was used while for metallic chiral structures a bi-layer technique using PMMA/hydrogen silsequioxane (HSQ) was applied. The polarization conversion capabilities of planar chiral structures imprinted in dielectric materials have experimentally been observed. This indicates that the developed processes in this work have the prospect of manufacturing planar photonic meta media in high volume at low cost
Oficio de afiliación RedBAALC : Universidad de Ixtlahuaca CUI A.C.
No full text1 página en PDF. Se anexa carta de confirmación de afiliación a la RedBAALC.Oficio emitido por el Dr. Margarito Ortega Ballesteros, rector de la Universidad de Ixtlahuaca CUI A.C., dirigido al Dr. Roberto Escalante Semerena, secretario general de la Unión de Universidades de América Latina y el Caribe (UDUALC), en el que solicita la afiliación a la Red de Bibliotecas Académicas de América Latina y el Caribe (RedBAALC) y en el que se designa como representante al Sr. Saúl Nava López, jefe del Departamento de Bibliotecas
Light-Weight Free-Standing Carbon Nanotube-Silicon Films for Anodes of Lithium Ion Batteries
No full textSilicon is an attractive alloy-type anode material because of its highest known capacity (4200 mAh/g). However, lithium insertion into and extraction from silicon are accompanied by a huge volume change, up to 300%, which induces a strong strain on silicon and causes pulverization and rapid capacity fading due to the loss of the electrical contact between part of silicon and current collector. Si nanostructures such as nanowires, which are chemically and electrically bonded to the current collector, can overcome the pulverization problem, however, the heavy metal current collectors in these systems are larger in weight than Si active material. Herein we report a novel anode structure free of heavy metal current collectors by integrating a flexible, conductive carbon nanotube (CNT) network into a Si anode. The composite film is free-standing and has a structure similar to the steel bar reinforced concrete, where the infiltrated CNT network functions as both mechanical support and electrical conductor and Si as a high capacity anode material for Li-ion battery. Such free-standing film has a low sheet resistance of similar to 30 Ohm/sq. It shows a high specific charge storage capacity (similar to 2000 mAh/g) and a good cycling life, superior to pure sputtered-on silicon films with similar thicknesses. Scanning electron micrographs show that Si is still connected by the CNT network even when small breaking or cracks appear in the film after cycling. The film can also "ripple up" to release the strain of a large volume change during lithium intercalation. The conductive composite film can function as both anode active material and current collector. It offers similar to 10 times improvement in specific capacity compared with widely used graphite/copper anode sheets.Y
Data for: Thermodynamic and Kinetic Study on the Catalytic Epoxidation of Allyl Chloride with H2O2 by New Catalyst [(C18H37)2(CH3)2N]3{PO4[W(O)(O2)2]4}
No full textThe uploaded pictures are all the experimental data in the article
Data for: OsDSSR1, a novel small peptide, enhances drought tolerance in transgenic rice
No full textRNA-seq analysis was carried out using transgenic lines OX37. Fourteen-day-old rice seedlings were treated with or without 20% solutions of PEG6000 for 6h. Total RNA was isolated with Trizol reagent (Invitrogen, USA) from seedlings of transgenic and 93-11 plants grown under normal or PEG conditions. Material from 10 plants of each genotype was pooled for RNA extraction. The concentration and quality of each RNA sample were determined using a NanoDrop 2000TM micro-volume spectrophotometer (Thermo Scientific, Waltham, MA, USA) and gel electrophoresis. The rice RNA samples were sent to BGI (The Beijing Genomics Institute at Shenzhen, China) for sequencing
Shengjiang Xiexin Decoction in the treatment of Clostridium difficile infection Related pharmacodynamic, microbiomics, and metabolomics datasets
No full textWe hypothesized that the ameliorative effect of SXD on CDI is related to the modulation of gut microbiota composition and metabolism by SXD. In the present study, we first investigated the effect of SXD on CDI mice. Then, we used 16s rDNA gene sequencing, non-targeted metabolomics, and serum pharmacochemistry to detect intestinal flora, metabolism, and blood prototype drug profiles in mice
Mechanism of glucose electrochemical oxidation on gold surface
No full textThe complex oxidation of glucose at the surface of gold electrodes was studied in detail in different conditions of pH, buffer and halide concentration. As observed in previous studies, an oxidative current peak occurs during the cathodic sweep showing a highly linear dependence on glucose concentration, when other electrolyte conditions are unchanged. The effect of the different conditions on the intensity of this peak has stressed the limitations of the previously proposed mechanisms. A mechanism able to explain the presence of this oxidative peak was proposed. The mechanism takes into account ion-sorption and electrochemical adsorption of OH−, buffer species (K2HPO4/KH2PO4) and halides
Optical particle detection integrated in a dielectrophoretic lab-on-a-chip
No full textThe design and fabrication of a dielectrophoretic "lab-on-a-chip" device for bioparticle processing and counting is presented. The device consists of a multi-layer travelling wave dielectrophoretic electrode array for manipulating particles and/or fluids, micro channels for delivering samples, and optical fibres for counting particles and/or measuring their velocities. Single particles were detected optically using either light scattering or fluorescence emission. The technology described in this work is potentially applicable to a range of particulate diagnostic systems
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