286,202 research outputs found
1,2-Dimethyl-4,5-diphenylbenzene determined on a Bruker SMART X2S benchtop crystallographic system
The title compound, C(20)H(18), has two crystallographically independent molecules in the asymmetric unit. The phenyl substituents of molecule A are twisted away from the plane defined by the central benzene ring by 131.8 (2) and -52.7 (3)degrees. The phenyl substituents of molecule B are twisted by -133.3 (2) and 50.9 (3)degrees. Each molecule is stabilized by a pair of intraMolecular C(aryl, sp(2))-H center dot center dot center dot pi interactions, as well as by several interMolecular C(methyl, sp(3))-H center dot center dot center dot pi interactions
Crystal structure of 9-methacryloylanthracene
The authors would like to thank the Graduate College and Chemistry Department at Cleveland State University for support, the Ohio Supercomputing Center for a grant of computer time, and the National Science Foundation (CHE-0840446) for funds used to purchase the Bruker APEXII DUO X-ray diffractometer used in this research.Peer reviewedPublisher PD
Experimental evidence for an intermediate phase in the multiferroic YMnO3
We have studied YMnO by high-temperature synchrotron X-ray powder
diffraction, and have carried out differential thermal analysis and dilatometry
on a single crystal sample. These experiments show two phase transitions at
about 1100K and 1350K, respectively. This demonstrates the existence of an
intermediate phase between the room temperature ferroelectric and the high
temperature centrosymmetric phase. This study identifies for the first time the
different high-temperature phase transitions in YMnO.Comment: 10 pages 5 figures. New version, Additional data, Journal of Physics:
Condensed Matter, in Pres
A 3D-Printed Offline Nano-ESI Source for Bruker MS Instruments
Nanoelectrospray ionization (nano-ESI) is a highly efficient and a widely used technique for the ionization of minute amounts of analyte. Offline nano-ESI sources are convenient for the direct infusion of complex mixtures that suffer from high matrix content and are crucial for the native mass spectrometric analysis of proteins. For Bruker instruments, no such source is readily available. Here we close this gap and present a 3D-printable nano-ESI source for Bruker instruments, which can be assembled by anyone with access to 3D printers. The source can be fitted to any Bruker mass spectrometer with an ionBooster ESI source and only requires minor, reversible changes to the original Bruker hardware. The general utility was demonstrated by recording high-resolution MS spectra of small molecules, intact proteins, as well as complex biological samples in negative and positive ion mode on two different Bruker instruments
Spin wave resonances in La_{0.7}Sr_{0.3}MnO_{3} films: measurement of spin wave stiffness and anisotropy field
We studied magnetic field dependent microwave absorption in epitaxial
LaSrMnO films using an X-band Bruker ESR spectrometer. By
analyzing angular and temperature dependence of the ferromagnetic and spin-wave
resonances we determine spin-wave stiffness and anisotropy field. The spin-wave
stiffness as found from the spectrum of the standing spin-wave resonances in
thin films is in fair agreement with the results of inelastic neutron
scattering studies on a single crystal of the same composition [Vasiliu-Doloc
et al., J. Appl. Phys. \textbf{83}, 7343 (1998)].Comment: 15 pages, 7 figures (now figure captions are included
Bruker2nifti: Magnetic Resonance Images converter from Bruker ParaVision to Nifti format
In clinical and pre-clinical research involving medical images, the first step following a Magnetic Resonance Imaging dataset acquisition, usually entails the conversion of image data from the native scanner format to a format suitable for the intended analysis. The proprietary [Bruker ParaVision](https://www.bruker.com/products/mr/preclinical-mri/software/service-support.html) software currently does not provide the tools for conversion of the data to suitable and open formats for research, such as nifti [@cox2004sort], for which most of the available tools for medical image analysis are implemented. For this purpose we have designed and developed [bruker2nifti](https://github.com/SebastianoF/bruker2nifti), a pip-installable Python tool provided with a Graphical User Interface to convert from the native MRI Bruker format to the nifti format, without any intermediate step through the DICOM standard formats [@Mildenberger2002]. Bruker2nifti is intended to be a tool to access the data structure and to parse all parameter files of the Bruker ParaVision format into python dictionaries, to select the relevant information to fill the Nifti header and data volume. Lastly it is meant to be a starting point where to integrate possible future variations in Bruker hardware and ParaVision software future releases
L’affaire Bruker c. Marcovitz : variations sur un thème
Signe de son temps, la décision de la Cour suprême du Canada dans l’affaire Bruker c. Marcovitz met en scène le multiculturalisme canadien, le pluralisme juridique, l’inter-normativité, la neutralité de l’État, l’intérêt public, la liberté contractuelle, le droit comparé, les valeurs fondamentales, dont la liberté de religion et l’égalité entre les hommes et les femmes. Elle brouille les frontières entre le droit privé et le droit public, entre la sphère privée et la sphère publique, de même qu’entre les normes juridiques et les normes religieuses. Elle façonne, déconstruit ou reconstruit la norme religieuse par le droit étatique. Dans le présent texte, cinq auteures et auteurs analysent les motifs de la Cour suprême à partir de perspectives différentes. Ils se penchent sur les forces et les faiblesses ainsi que sur les silences, sans oublier les dissonances, de l’opinion majoritaire et de l’opinion dissidente. D’abord, la question du droit international privé est examinée, puisque l’affaire met en jeu les relations entre deux ordres juridiques, soit l’ordre juridique canadien et québécois et l’ordre juridique juif ou hébraïque. Puis la décision est revisitée à partir d’un cadre théorique féministe. Ensuite, la résolution du conflit entre la liberté religieuse et l’égalité des sexes est traitée. Enfin, un auteur se penche sur la conception de la liberté mise en avant dans la décision examinée et une auteure analyse la distinction, les relations et les frontières entre les traditions juridiques étatiques et les traditions juridiques religieuses.As a sign of our times, the decision handed down by the Supreme Court of Canada in the case of Bruker v. Marcovitz calls into play Canadian multiculturalism, legal pluralism, internormativity, State neutrality, public interest, freedom of contract, comparative law, fundamental rights including freedom of religion and gender equality. It crosses the boundaries separating public law and private law, the private and public domains, as well as legal and religious norms. It shapes, de-structures or restructures religious norms through the law of the State. In this paper, five authors analyze the Supreme Court’s decision on the basis of differing perspectives. They underline the strengths and weaknesses, the silences and conflicting views of the majority and dissident opinions. First of all, a private international law analysis is applied, since the case involves relations between two juridical systems, namely the Canadian and Québec system of law and the Jewish or Hebrew legal order. Then the decision is examined in the light of a feminist perspective. From there, the conflict between freedom of religion and gender equality is addressed. An author then delves into the conception of liberty as set forward in the decision under study and last of all, an author analyses the distinction, relations and boundaries separating State legal traditions from their religious counterparts
Structural Studies Of Some Natural Products From Kaempferia Parviflora, Iris Germanica Linn. And Andrographis Paniculata Nees [QD905.2. T261 2007 f rb].
Dalam kajian ini, struktur hablur untuk lima produk semulajadi telah ditentukan melalui kaedah kristalografi sinar-x hablur tunggal. Data hablur diperolehi dengan menggunakan alat difraktometer APEX-2 CCD (Bruker, 2005).
In this research, single crystal x-ray crystallography method had been used to determine the crystal structures of five natural products. The data was collected
using the APEX-2 CCD diffractometer (Bruker, 2005)
Electro-mechanical properties of REBCO coated conductors from various industrial manufacturers at 77 K, self-field and 4.2 K, 19 T
Rare-earth-barium-copper-oxide (REBCO) tapes are now available from several
industrial manufacturers and are very promising conductors in high field
applications. Due to diverging materials and deposition processes, these
manufacturers' tapes can be expected to differ in their electro-mechanical and
mechanical properties. For magnets designers, these are together with the
conductors' in-field critical current performance of the highest importance in
choosing a suitable conductor. In this work, the strain and stress dependence
of the current carrying capabilities as well as the stress and strain
correlation are investigated for commercial coated conductors from Bruker HTS,
Fujikura, SuNAM, SuperOx and SuperPower at 77 K, self-field and 4.2 K, 19 T
A New Pseudopolymorph of Hexakis-(4-cynaophenyl)benzene
The title compound (systematic name: benzene-4,4′,4′′,4′′′,-4′′′′,4′′′′′-hexaylhexabenzonitrile dichloromethane disolvate), C48H24N6•2CH2Cl2, crystallizes as an inclusion compound during the slow diffusion of methanol into a solution of hexakis(4-cyanophenyl)benzene in CH2Cl2. The hexakis(4- cyanophenyl)benzene molecule lies on an axis of twofold rotation in the space group Pbcn. Weak C—H•••N interactions between hexakis(4-cyanophenyl)benzene molecules define an open network with space for including guests. The resulting structure is a new pseudopolymorph of hexakis-(4-cyanophenyl)benzene. The eight known pseudopolymorphs have few shared architectural features, in part because none of the intermolecular interactions that are present plays a dominant role or forces neighboring molecules to assume particular relative orientations
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