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Velocity analysis of simultaneous-source data using high-resolution semblance: Coping with the strong noise

Gan, S. (author), Wang, S. (author), Chen, Y. (author), Qu, S. (author), Zu, S. (author)

Direct imaging of simultaneous-source (or blended) data, without the need of deblending, requires a precise subsurface velocity model. In this paper, we focus on the velocity analysis of simultaneous-source data using the normal moveout-based velocity picking approach.We demonstrate that it is possible to obtain a precise velocity model directly...

journal article 2016

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On the Michael addition of water to C = C bonds

Chen, B. (author)

?-Hydroxy carbonyl compounds are an important class of compounds often found as a common structural motif in natural products. Although the molecules themselves look rather simple, their synthesis can be challenging. Water addition to conjugated C = C bonds opens up a straightforward route for the preparation of ?-hydroxy carbonyl compounds....

doctoral thesis 2015

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De novo sequencing of two novel peptides homologous to calcitonin-like peptides, from skin secretion of the Chinese Frog, Odorrana schmackeri

Evaristo, G.P.C. (author), Pinkse, M.W.H. (author), Chen, T. (author), Wang, L. (author), Mohammed, S. (author), Heck, A.J.R. (author), Mathes, I. (author), Lottspeich, F. (author), Shaw, C. (author), Albar, J.P. (author), Verhaert, P.D.E.M. (author)

An MS/MS based analytical strategy was followed to solve the complete sequence of two new peptides from frog (Odorrana schmackeri) skin secretion. This involved reduction and alkylation with two different alkylating agents followed by high resolution tandem mass spectrometry. De novo sequencing was achieved by complementary CID and ETD...

journal article 2015

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Risk Factors and Consequences of Cortical Thickness in an Asian Population

Hilal, S. (author), Xin, X. (author), Ang, S.L. (author), Tan, C.S. (author), Venketasubramanian, N. (author), Niessen, W.J. (author), Vrooman, H. (author), Wong, T.Y. (author), Chen, C. (author), Ikram, M.K. (author)

Cortical thickness has been suggested to be one of the most important markers of cortical atrophy. In this study, we examined potential risk factors of cortical thickness and its association with cognition in an elderly Asian population from Singapore. This is a cross-sectional study among 572 Chinese and Malay patients from the ongoing...

journal article 2015

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Enantioselective Michael Addition of Water

Chen, B.S. (author), Resch, V. (author), Otten, L.G. (author), Hanefeld, U. (author)

The enantioselective Michael addition using water as both nucleophile and solvent has to date proved beyond the ability of synthetic chemists. Herein, the direct, enantioselective Michael addition of water in water to prepare important ?-hydroxy carbonyl compounds using whole cells of Rhodococcus strains is described. Good yields and excellent...

journal article 2014

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Tunable Luminescence of CeAl11O18 Based Phosphors by Replacement of (AlO)+ by (SiN)+ and Co-Doping with Eu

Yin, L.J. (author), Chen, G.Z (author), Wang, C. (author), Xu, X. (author), Hao, L.Y. (author), Hintzen, H.T.J.M. (author)

A series of Si-N or Eu-Li doped CeAl11O18 and CeAl12O18N phosphors are prepared by solid–state reaction. Their structure and luminescence are researched carefully. Si-N doping with the concentration less than 8% can be successfully dissolved into CeAl11O18 crystal lattice and doesn't change the matrix structure, only resulting in crystal lattice...

journal article 2014

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Spin Caloritronic Phenomena Driven by Spin-orbit Coupling

Chen, Y.T. (author)

In this thesis, we report several effects in spintronics and spin caloritronics related to relativistic spin-orbit coupling. In Chapter 2, we discuss the relativistic spin caloritronicHall effects in terms of a semiclassical theory for anomalous thermoelectric effects in ferromagnetic metals due to spin-orbit scattering at impurities, including...

doctoral thesis 2014

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Michael hydratase alcohol dehydrogenase or just alcohol dehydrogenase?

Resch, V.A. (author), Jin, J. (author), Chen, B.S. (author), Hanefeld, U. (author)

The Michael hydratase – alcohol dehydrogenase (MhyADH) from Alicycliphilus denitrificans was previously identified as a bi-functional enzyme performing a hydration of ?,?-unsaturated ketones and subsequent oxidation of the formed alcohols. The investigations of the bi-functionality were based on a spectrophotometric assay and an activity...

journal article 2014

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Current-induced spin-wave excitation in Pt/YIG bilayer

Zhou, Y. (author), Jiao, H. (author), Chen, Y. (author), Bauer, G.E.W. (author), Xiao, J. (author)

We develop a self-consistent theory for current-induced spin-wave excitations in normal metal/magnetic insulator bilayer structures. We compute the spin-wave dispersion and dissipation, including dipolar and exchange interactions in the magnet, the spin diffusion in the normal metal, as well as the surface anisotropy, spin-transfer torque, and...

journal article 2013

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Experimental Test of the Spin Mixing Interface Conductivity Concept

Weiler, M. (author), Althammer, M. (author), Schreier, M. (author), Lotze, J. (author), Pernpeintner, M. (author), Meyer, S. (author), Huebl, H. (author), Gross, R. (author), Kamra, A. (author), Xiao, J. (author), Chen, Y.T. (author), Jiao, H.J. (author), Bauer, G.E.W. (author), Goennenwein, S.T.B. (author)

We perform a quantitative, comparative study of the spin pumping, spin Seebeck, and spin Hall magnetoresistance effects, all detected via the inverse spin Hall effect in a series of over 20??yttrium???iron?garnet/Pt samples. Our experimental results fully support present, exclusively spin current-based, theoretical models using a single set of...

journal article 2013

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On the Michael Addition of Water to ?,?-Unsaturated Ketones Using Amino Acids

Resch, V. (author), Seidler, C. (author), Chen, B.S. (author), Degeling, I. (author), Hanefeld, U. (author)

The use of water as a nucleophile for Michael additions is still a challenge in organic chemistry. In this report we describe the use of amino acids as catalysts for the Michael addition of water to ?,?-unsaturated ketones. All 20 proteinogenic amino acids were screened and L-lysine was identified as the best candidate. To obtain a better...

journal article 2013

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Draft genome sequence of Rhodococcus rhodochrous strain ATCC 17895

Chen, B.S. (author), Otten, L.G. (author), Resch, V. (author), Muyzer, G. (author), Hanefeld, U. (author)

Rhodococcus rhodochrous ATCC 17895 possesses an array of mono- and dioxygenases, as well as hydratases, which makes it an interesting organism for biocatalysis. R. rhodochrous is a Gram-positive aerobic bacterium with a rod-like morphology. Here we describe the features of this organism, together with the complete genome sequence and annotation....

journal article 2013

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Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids

Althammer, M. (author), Meyer, S. (author), Nakayama, H. (author), Schreier, M. (author), Altmannshofer, S. (author), Weiler, M. (author), Huebl, H. (author), Gesprägs, S. (author), Opel, M. (author), Gross, R. (author), Meier, D. (author), Klewe, C. (author), Kuschel, T. (author), Schmalhorst, J.M. (author), Reiss, G. (author), Shen, L. (author), Gupta, A. (author), Chen, Y.T. (author), Bauer, G.E.W. (author), Saitoh, E. (author), Goennenwein, S.T.B. (author)

We experimentally investigate and quantitatively analyze the spin Hall magnetoresistance effect in ferromagnetic insulator/platinum and ferromagnetic insulator/nonferromagnetic metal/platinum hybrid structures. For the ferromagnetic insulator, we use either yttrium iron garnet, nickel ferrite, or magnetite and for the nonferromagnet, copper or...

journal article 2013

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Spin Hall Magnetoresistance Induced by a Nonequilibrium Proximity Effect

Nakayama, H. (author), Althammer, M. (author), Chen, Y.T. (author), Uchida, K. (author), Kajiwara, Y. (author), Kikuchi, D. (author), Ohtani, T. (author), Geprägs, S. (author), Opel, M. (author), Takahashi, S. (author), Gross, R. (author), Bauer, G.E.W. (author), Goennenwein, S.T.B. (author), Saitoh, E. (author)

We report anisotropic magnetoresistance in Pt|Y3Fe5O12 bilayers. In spite of Y3Fe5O12 being a very good electrical insulator, the resistance of the Pt layer reflects its magnetization direction. The effect persists even when a Cu layer is inserted between Pt and Y3Fe5O12, excluding the contribution of induced equilibrium magnetization at the...

journal article 2013

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Theory of spin Hall magnetoresistance

Chen, Y.T. (author), Takahashi, S. (author), Nakayama, H. (author), Althammer, M. (author), Goennenwein, S.T.B. (author), Saitoh, E. (author), Bauer, G.E.W. (author)

We present a theory of the spin Hall magnetoresistance (SMR) in multilayers made from an insulating ferromagnet F, such as yttrium iron garnet (YIG), and a normal metal N with spin-orbit interactions, such as platinum (Pt). The SMR is induced by the simultaneous action of spin Hall and inverse spin Hall effects and therefore a nonequilibrium...

journal article 2013

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New Oxidizer for Advanced Propellants

Chen, J.C. (author), Pronk, T.M.C. (author), Van de Wouw, A. (author)

Document(en) uit de collectie Chemische Procestechnologie

report 2011

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Excimer laser crystallization of InGaZnO4 on SiO2 substrate

Chen, T. (author), Wu, M.Y. (author), Ishihara, R. (author), Nomura, K. (author), Kamiya, T. (author), Hosono, H. (author), Beenakker, C.I.M. (author)

In this paper, we were able to crystallize InGaZnO4 (IGZO) by excimer laser on SiO2 substrate. It was observed that uniform [0001] textured polycrystalline IGZO film has been obtained without any grain boundaries and oxygen vacancies on SiO2 substrate. This process is very promising in fabricating high quality IGZO thin film transistors (TFT) at...

journal article 2011

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Evidence of Protein Collective Motions on the Picosecond Timescale

He, Y. (author), Chen, J.Y. (author), Knab, J.R. (author), Zheng, W. (author), Markelz, A.G. (author)

We investigate the presence of structural collective motions on a picosecond timescale for the heme protein, cytochrome c, as a function of oxidation and hydration, using terahertz (THz) time domain spectroscopy and molecular dynamics simulations. The THz response dramatically increases with oxidation, with the largest increase for lowest...

journal article 2011

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Nanofabrication with a helium ion microscope

Maas, D. (author), Van veldhoven, E. (author), Chen, P. (author), Sidorkin, V. (author), Salemink, H. (author), Van der Drift, E. (author), Alkemade, P. (author)

The recently introduced helium ion microscope (HIM) is capable of imaging and fabrication of nanostructures thanks to its sub-nanometer sized ion probe [1,2]. The unique interaction of the helium ions with the sample material provides very localized secondary electron emission, thus providing a valuable signal for high-resolution imaging as well...

conference paper 2010

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Model for nanopillar growth by focused helium ion-beam-induced deposition

Alkemade, P.F.A. (author), Chen, P. (author), Van Veldhoven, E. (author), Maas, D. (author)

An analytical model for the growth of nanopillars by helium ion-beam-induced deposition is presented and compared to experimental data. This model describes the competition between pillar growth in vertical and lateral directions. It assumes that vertical growth is induced by incident primary ions and type-1 secondary electrons, whereas lateral...

journal article 2010