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中国神经科学学会第十二届全国学术会议

作者： Xufeng Chen Muhammad Aslam Tim Gollisch Kevin Allen jakob von engelhardt Institute of Pathophysiology University Medical Center of the Johannes Gutenberg University Mainz Department of Ophthalmology University Medical Center G?ttingen Department of Clinical Neurobiology Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ)

Relay neurons in the dorsal lateral geniculate nucleus（d LGN） receive excitatory inputs form retinal ganglion cells via retinogeniculate synapses, which display strong short-term depression of AMPA receptors（AMPARs） mediated current. However, the underlying mechanism is still not clear. Here we identified CKAMP44 as a crucial AMPARs auxiliary protein in the dorsal lateral geniculate synapse, in which they promote AMPARs surface expression. Moreover, CKAMP44 helps to maintain shortterm plasticity of retinogeniculate synapses by slowing AMPARs recovery from desensitization. In addition, deletion of CKAMP44 increases the firing probability of relay neurons under high frequency stimulation on optic tract. Finally, in vivo unit recording in the d LGN showed that ON and OFF response of d LGN neurons were stronger in CKAMP44 knockout mice, demonstrating the importance of CKAMP44 modulated synaptic short-term depression for visual input integration.

关键词： CKAMP44 AMPA receptors desensitization short-term plasticity visual input integration

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In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses

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Light(Science & Applications) 2016年第1期5卷 396-402页

作者： Rajendran Rajeev Johannes Hellwagner Anne Schumacher Inga Jordan Martin Huppert Andres Tehlar Bhargava Ram Niraghatam Denitsa Baykusheva Nan Lin Aaron von Conta Hans jakob Wörner Laboratory of Physical Chemistry Department of Chemistry and Applied BiosciencesVladimir-Prelog-Weg 2ETH ZurichZurich 8093Switzerland

Monochromatization of high-harmonic sources has opened fascinating perspectives regarding time-resolved photoemission from all phases of *** studies have invariably involved the use of spectral filters or spectrally dispersive optical components that are inherently lossy and technically *** we present a new technique for the spectral selection of near-threshold harmonics and their spatial separation from the driving beams without any optical *** discover the existence of a narrow phase-matching gate resulting from the combination of the non-collinear generation geometry in an extended medium,atomic resonances and *** technique offers a filter contrast of up to 104 for the selected harmonics against the adjacent ones and offers multiple temporally synchronized beamlets in a single unified *** demonstrate the selective generation of 133,80 or 56 nm femtosecond pulses from a 400-nm driver,which is specific to the target *** results open new pathways towards phase-sensitive multi-pulse spectroscopy in the vacuum-and extreme-ultraviolet,and frequencyselective output coupling from enhancement cavities.

关键词： beam splitting below-threshold harmonics coherent extreme-ultraviolet pulses frequency gating non-collinear generation

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Medieval & Renaissance art

Medieval & Renaissance art

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作者： (author..1794-1859 )Becker Carl (writer of added commentary )Warncke Carsten-Peter (author..1811-1903 )Hefner-Alteneck jakob Heinrich von

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Dielectric and physico-chemical behavior of single thermally thick wood blocks under microwave assisted pyrolysis

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Particuology 2024年第3期86卷 291-303页

作者： Nicole Vorhauer-Huget jakob Seidenbecher Supriya Bhaskaran Francesca Schenkel Lucas Briest Suresh Gopalkrishna Jan Barowski Andrea Dernbecher Liane Hilfert Ilona Rolfes Alba Dieguez-Alonso Otto von Guericke University Magdeburg Universitatsplatz 239106MagdeburgGermany Ruhr University Bochum Institute of Microwave SystemsUniversitatsstraβe 15044801BochumGermany

Pyrolysis of thermally thick beech wood blocks with a size of around 2.5×8×6 cm^(3)(width×length×height)was carried out in a lab scale microwave reactor with a frequency of 2.45 GHz,operated,both,at 300 W and 600 W under inert conditions,using N_(2) at around 400 mbar absolute *** microwave cavity had a size of 20×20×20 cm^(3).The specific energy supply referred to the untreated wood block was 4-8 W/g,with slight variations depending on the initial water *** mass loss and the reflected microwave power were in-situ monitored during the *** sample surface and chamber temperatures were measured with a pyrometer and a thermocouple,***-chemical and dielectric properties of the produced solids were investigated and compared to those of chars produced under conventional pyrolysis using the same raw *** is shown that the complex dielectric permittivity of the solid products changed drastically during the pyrolysis process,with increasing heating properties as the conversion process *** was easily achieved using 60o W without ***,300 W was not enough to achieve a high conversion degree,independently of the irradiation ***,together with the physico-chemical analyses of the solids,hinted to the importance of the transport kinetics in thermally thick materials,although further investigationis still required.

关键词： Microwave assistedpyrolysis Conventional pyrolysis Dielectric measurements Penetration depth Elemental analysis

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