H2O2 production at gas-diffusion cathodes made from agarose-derived carbons with different textural properties for acebutolol degradation in chloride media

The excessive cost, unsustainability or complex production of new highly selective electrocatalysts for H2O2 production, especially noble-metal-based ones, is prohibitive in the water treatment sector. To solve this conundrum, biomass-derived carbons with adequate textural properties were synthesized via agarose doublestep pyrolysis followed by steam activation. A longer steam treatment enhanced the graphitization and porosity, even surpassing commercial carbon black. Steam treatment for 20 min yielded the greatest surface area (1248 m2 g-1), enhanced the mesopore/micropore volume distribution and increased the activity (E1/2 = 0.609 V) and yield of H2O2 (40%) as determined by RRDE. The upgraded textural properties had very positive impact on the ability of the corresponding gas-diffusion electrodes (GDEs) to accumulate H2O2, reaching Faradaic current efficiencies of ~95% at 30 min. Acidic solutions of β-blocker acebutolol were treated by photoelectro- Fenton (PEF) process in synthetic media with and without chloride. In urban wastewater, total drug disappearance was reached at 60 min with almost 50% mineralization after 360 min at only 10 mA cm-2. Up to 14 degradation products were identified in the Cl--containing medium

Simultaneous Millimeter-wave Multi-line Observation at Syowa: Results in the First Year of Regular Observation

The 14th Symposium on Polar Science/Ordinary sessions [OS] Space and upper atmospheric sciences, Wed. 15 Nov. / Entrance Hall (1st floor), National Institute of Polar Researchconference objec

Geo-Ontology Tools – the missing link

Numerous authors have presented ontology building tools that have all been developed as part of academic projects and that are usually adaptations of more generic tools for geo-spatial applications. While we trust that these tools do their job for the special purpose they have been built, the GIScience user community is still a long way away from off-the-shelf ontology builders that can be used by GIS project managers. In this article, we present a comparative study of ontology building tools described in some twenty peer-reviewed GIScience journal articles. We analyze them from the perspective of two application domains, crime analysis and transportation/land use. For the latter, we developed a database schema, which is substantially different from the three main templates commonly used. The crime analysis application uses a rule base for an agent-based model that had no precursor. In both cases, the currently available set of tools cannot replace manual coding of ontologies for use with ESRI-based application software. Based on these experiences, we outline a requirements list of what the tools described in the first part of the article are missing to make them practical from an applications perspective. The result is an R&D agenda for this important aspect of GIScience

Statistical methods applied to the analysis of blasting vibrations in a diabase quarry in the city of Campinas, (SP) Brazil

Statistical methods of multiple regression analysis, trend surface analysis and principal components analysis were applied to seismographic data recorded during production blasting at a diabase quarry in the urban area of Campinas (SP), Brazil. The purpose of these analyses was to determine the influence of the following variables: distance (D), charge weight per delay (W), and scaled distance (SD) associated with properties of the rock body (orientation, frequency and angle of geological discontinuities; depth of bedrock and thickness of the soil overburden) in the variation of the peak particle velocity (PPV). This approach yielded variables with larger influences (loads) on the variation of ground vibration, as well as behavior and space tendency of this variation. The results showed a better relationship between PPV and D, with D being the most important factor in the attenuation of the ground vibrations. The geological joints and the depth to bedrock have a larger influence than the explosive charges in the variation of the vibration levels, but frequencies appear to be more influenced by the amount of soil overburden

El débito ácido máximo con estímulo al Histalog Comparación del Débito Ácido Máximo empleando el Histalog y la insulina como estimulantes

Los autores estudian la secreción gástrica empleando el Histalog a la cuádruple dosis con dos objetos: primero, determinar el Débito Ácido Máximo o sea la máxima secreción gástrica y segundo, comparar el efecto estimulante del Histalog con el de la hipoglicemia insulínica para lo cual utilizan dos series de pacientes: la primera, compuesta de 170 personas (30 normales, 30 con úlcera gástrica, 71 con úlcera duodenal, 30 con gastritis atrófica y 9 con gastritis superficial), y en los cuales encuentra que la máxima secreción gástrica se determina en el período de los 30' - 90' de estimulación; la segunda serie compuesta de 80 personas (7 normales, 20 ulcerosos gástricos, 40 ulcerosos duodenales y 13 portadores de gastritis atrófica), en los que determinan que la secreción gástrica estimulada por el Histalog es superior a la estimulada por la hipoglicemia insulínica. Concluyen discutiendo el probable mecanismo de acción del Histalog y la acción de la hipoglicemia insulínica y de la misma insulina sobre la secreción gástrica como factor de inhibición de la secreción gástrica que explicaría la diferencia de valores que encuentran.</jats:p

CDF data of cosmic noise absorption measured with the 30 MHz broad-beam riometer at Athabasca, Canada.

Cosmic Noise Absorption (CNA) measured at 1-sec intervals with the 30 MHz broad-beam riometer at Athabasca, Canada. The data are distributed in the Common Data Format (CDF).datase

Monthly averaged and daily data plot of neutral wind velocity at the EISCAT Alta site (PDF format).

Monthly averaged and daily data plot of northward and eastward wind velocity in a height range from 71 to 110 km taken by the meteor radar at the Alta site, Norway. The available period is since September 8, 2007. For detail of the instrument, please see the paper of Nozawa et al. (JASTP, 2012). The full reference is a paper of Nozawa, S., C.M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. T. Tsuda, S. Oyama, R. Fujii, Mean winds, tides, and quasi-2 day waves above Bear Island, J. Atmos. Solar-Terr. Phys., 90-91, 26-44, 2012.datase

64Hz induction magnetometer data for Husafell in CDF

The induction magnetometer data observed at Husafell, Iceland. The data consist of variations of three-dimensional (H, D, and Z components) geomagnetic field taken with a sampling rate of 64 Hz, and some engineering parameters for the instrument, such as the sensitivity and phase difference. The digital data are distributed in the Common Data Format (CDF) through the ERG-SC repository. Importnat Notes: 1. For frequencies below ~1Hz, use the following equation to obtain amplitude values in units of nT/s: dB/dt (nT/s) = data (V) / quick_sensitivity. The value of quick_sensitivity is given in global attributes. For frequencies above ~1Hz, use the exact sensitivity curve to obtain absolute amplitude of waves. 2. Please note that the positive direction (polarity) of H, D, and Z are different depending on the station. For example, in February 2011, the polarity is GAK: positive=northward, eastward, upward; MGD: positive=northward, eastward, downward; ATH: positive=northward, eastward, downward; MSR: positive=southward, westward, upward; STA: positive=northward, eastward, downward. Please see http://stdb2.isee.nagoya-u.ac.jp/magne/magne_stations.html for the latest information.datase