734 research outputs found

    Third Revision of the Global Surface Seawater Dimethyl Sulfide Climatology (DMS-Rev3)

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    This dataset contains all the input data and the Matlab codes for the Third Revision of the Global Surface Seawater Dimethyl Sulphide Climatology (DMS-Rev3) Shrivardhan Hulswar, Rafel Simo, Martí Galí, Thomas G. Bell, Arancha Lana, Swaleha Inamdar, Paul R. Halloran, George Manville and Anoop S. Mahajan *corresponding author: Anoop Sharad Mahajan ([email protected]) Details to run the code can be found in the word file: Code details.doc

    Third Revision of the Global Surface Seawater Dimethyl Sulfide Climatology (DMS-Rev3)

    No full text
    This dataset contains all the input data and the Matlab codes for the Third Revision of the Global Surface Seawater Dimethyl Sulphide Climatology (DMS-Rev3)Shrivardhan Hulswar, Rafel Simo, Martí Galí, Thomas G. Bell, Arancha Lana, Swaleha Inamdar, Paul R. Halloran, George Manville and Anoop S. Mahajan*corresponding author: Anoop Sharad Mahajan ([email protected])Details to run the code can be found in the word file: Code details.docxTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

    An additional record of Fejervarya manoharani Garg and Biju from the Western Ghats with a description of its complete mitochondrial genome

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    Kiran, S. Kumar, Anoop, V. S., Sivakumar, K. C., Dinesh, Raghunathan, Mano, J. P., Kaushik, Deuti, Sanil, George (2017): An additional record of Fejervarya manoharani Garg and Biju from the Western Ghats with a description of its complete mitochondrial genome. Zootaxa 4277 (4): 491-502, DOI: https://doi.org/10.11646/zootaxa.4277.4.

    Multidiagnostic analysis of ion dynamics in ultrafast laser ablation of metals over a large fluence range

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    The dynamics of ions in ultrafast laser ablation of metals is studied over fluences ranging from the ablation threshold up to approximate to 75 J/cm(2) by means of three well-established diagnostic techniques. Langmuir probe, Faraday cup, and spectrally resolved intensified charge coupled device imaging simultaneously monitored the ions produced during ultrafast laser ablation of a pure copper target with 800 nm, approximate to 50 fs, Ti: Sapphire laser pulses. The fluence dependence of ion yield is analyzed, resulting in the observance of three different regimes. The specific ion yield shows a maximum at about 4-5 J/cm(2), followed by a gradual reduction and a transition to a high-fluence regime above approximate to 50 J/cm(2). The fluence dependence of the copper ions angular distribution is also analyzed, observing a gradual increase in forward-peaking of Cu ions for fluences up to approximate to 10 J/cm(2). A broader ion component is observed at larger angles for fluences larger than approximate to 10 J/cm(2). Finally, an experimental characterization of the ionic angular distribution for several metallic targets (Mg, Al, Cr, Fe, Cu, and W) is carried out at a relatively high fluence of approximate to 66 J/cm(2). Interestingly, the ion emission from the volatile metals shows a narrow, forward-peaked distribution, and a high peak ion yield compared to the refractory metals. Moreover, the width of ionic angular distributions presents a striking correlation with the peak ion yield

    Nano-machining of biosensor electrodes through gold nanoparticles deposition produced by femtosecond laser ablation

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    We report an application of femtosecond laser ablation to improve the sensitivity of biosensors based on a quartz crystal microbalance device. The nanoparticles produced by irradiating a gold target with 527-nm, 300-fs laser pulses, in high vacuum, are directly deposited on the quartz crystal microbalance electrode. Different gold electrodes are fabricated by varying the deposition time, thus addressing how the nanoparticles surface coverage influences the sensor response. The modified biosensor is tested by weighting immobilized IgG antibody from goat and its analyte (IgG from mouse), and the results are compared with a standard electrode. A substantial increase of biosensor sensitivity is achieved, thus demonstrating that femtosecond laser ablation and deposition is a viable physical method to improve the biosensor sensitivity by means of nanostructured electrodes

    Laser ablation of silicon induced by a femtosecond optical vortex beam

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    We investigate laser ablation of crystalline silicon induced by a femtosecond optical vortex beam, addressing how beam properties can be obtained by analyzing the ablation crater. The morphology of the surface structures formed in the annular crater surface allows direct visualization of the beam polarization, while analysis of the crater size provides beam spot parameters. We also determine the diverse threshold fluences for the formation of various complex microstructures generated within the annular laser spot on the silicon sample. Our analysis indicates an incubation behavior of the threshold fluence as a function of the number of laser pulses, independent of the optical vortex polarization, in weak focusing conditions
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