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Abstracts of papers Minneapolis Fall Meeting (1963)

Litchfield, C. C. ; Rakoff, Henry ; Maire, Renȳ ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1963; 40(9): 9-45. Published 1963 Sep 01. doi: 10.1007/bf02632851.

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Publikationsdatum: 1963-09-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Publiziert von Wiley

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A new macromolecular crystallography Station (9.5) on the SRS wiggler beam line for very rapid Laue and rapidly tunable monochromatic measurements: Commissioning and first results : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)

Thompson, A. W. ; Habash, J. ; Harrop, S. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 63 (1992), S. 1062-1064

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: A new instrument (Station 9.5) has been established on the wiggler line at the Daresbury Synchrotron Radiation Source (SRS). It extends the experimental capability at Daresbury for macromolecular crystallography beyond what is provided for with Stations 7.2 (Ref. 1), 9.6 (Ref. 2), and 9.7 by providing a point focused white beam (from a Pt-coated toroid mirror) and/or a rapidly tunable monochromatic beam (using a water-cooled double-crystal monochromator (Ref. 3). The design principles of the new Station 9.5 have been published (Ref. 4). A CCD detector for the station is being developed (preliminary work is described in Ref. 5, or see the additional poster at this meeting) to allow time slices of part of a diffraction pattern to be measured. Laue patterns are currently recorded on film, but access to an image plate detector will shortly become available. Shutter speeds down to 50 μs are routinely available using a rotating disk shutter (Ref. 6). Fluorescence detectors are available for optimized anomalous dispersion data collection. The experimental bench is long enough to accommodate a camera system, and downstream from it an "on-line'' image plate scanner. Data collected on the instrument in various modes of operation will be described for a variety of macro and small molecule crystal systems.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1143199

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Triangulanes: stereoisomerism and general method of synthesis [Erratum to document cited in CA113(21):190797n] (1991)

Zefirov, N. S. ; Kozhushkov, S. I. ; Kuznetsova, T. S. ; [weitere]

s.l. : American Chemical Society

Journal of the American Chemical Society 113 (1991), S. 9901-9901

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ISSN: 1520-5126

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/ja00026a054

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Triangulanes: stereoisomerism and general method of synthesis (1990)

Zefirov, N. S. ; Kozhushkov, S. I. ; Kuznetsova, T. S. ; [weitere]

s.l. : American Chemical Society

Journal of the American Chemical Society 112 (1990), S. 7702-7707

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ISSN: 1520-5126

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/ja00177a034

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Reconstitution of the Water-Oxidizing Complex in Manganese-Depleted Photosystem II Complexes by Using Synthetic Binuclear Manganese Complexes. (1994)

Allakhverdiev, S. I. ; Karacan, M. S. ; Somer, G. ; [weitere]

s.l. : American Chemical Society

Biochemistry 33 (1994), S. 12210-12214

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ISSN: 1520-4995

Quelle: ACS Legacy Archives

Thema: Biologie , Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/bi00206a025

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Kinetics of the formation of hydroxylamine disulfonate by reaction of nitrite with sulfites (1981)

Oblath, S. B. ; Markowitz, S. S. ; Novakov, T. ; [weitere]

s.l. : American Chemical Society

The @journal of physical chemistry 〈Washington, DC〉 85 (1981), S. 1017-1021

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Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/j150608a018

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Kinetics of the initial reaction of nitrite ion in bisulfite solutions (1982)

Oblath, S. B. ; Markowitz, S. S. ; Novakov, T. ; [weitere]

s.l. : American Chemical Society

The @journal of physical chemistry 〈Washington, DC〉 86 (1982), S. 4853-4857

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Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/j100222a005

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Analysis of polarizabilities, potentials, and geometries of alkali–halide dimers (1991)

Chauhan, R. S. ; Sharma, S. C. ; Sharma, S. B. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 95 (1991), S. 4397-4406

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: An analysis of electronic polarizabilities, interionic potentials, and equilibrium geometries for 20 alkali–halide dimers such as Na2Cl2 is presented. The electronic polarizabilities of ions in dimers have been calculated by taking account of the electrostatic potential due to neighboring ions within the Seitz–Ruffa energy level analysis. The polarizabilities thus obtained for dimers are then used to evaluate the magnitudes of polarization energies and van der Waals dipole–dipole energies. For describing the overlap repulsive potential we have adopted two forms: (i) the revised version of the Born–Mayer potential and (ii) the Harrison form for the overlap repulsive energy. These potentials have been used to obtain the binding energies of monomers as well as dimers, spectroscopic constants of monomers, equilibrium geometries of dimers, and dimerization energies. The results have been discussed and compared with available experimental data.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.461763

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Alpha particle diagnostics using impurity pellet injection (invited) : Proceedings of the 9th topical conference on high temperature plasma diagnostics (1992)

Fisher, R. K. ; McChesney, J. M. ; Howald, A. W. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 63 (1992), S. 4499-4504

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: We have proposed using impurity pellet injection to measure the energy distribution of the fast confined alpha particles in a reacting plasma [R. K. Fisher et al., Fusion Technol. 13, 536 (1988)]. The ablation cloud surrounding the injected pellet is thick enough that an equilibrium fraction F∞0(E) of the incident alphas should be neutralized as they pass through the cloud. By observing neutrals created in the large spatial region of the cloud which is expected to be dominated by the heliumlike ionization state, e.g., Li+ ions, we can determine the incident alpha distribution dnHe2+/dE from the measured energy distribution of neutral helium atoms dnHe0/dE using dnHe0/dE = dnHe2+/dE⋅F∞0 (E,Li+). Initial experiments were performed on the Texas Experimental Tokamak (TEXT) in which we compared pellet penetration with our impurity pellet ablation model [P. B. Parks et al., Nucl. Fusion 28, 477 (1988)], and measured the spatial distribution of various ionization states in carbon pellet clouds [R. K. Fisher et al., Rev. Sci. Instrum. 61, 3196 (1990)]. Experiments have recently begun on the Tokamak Fusion Test Reactor (TFTR) with the goal of measuring the alpha particle energy distribution during D–T operation in 1993–94. A series of preliminary experiments are planned to test the diagnostic concept. The first experiments will observe neutrals from beam-injected deuterium ions and the high energy 3He tail produced during ion cyclotron (ICH) minority heating on TFTR interacting with the cloud. We will also monitor by line radiation the charge state distributions in lithium, boron, and carbon clouds. Later experiments are planned to measure the energy distribution of the 3.7 MeV alphas created by 3He–D reactions during ICH minority heating. Observations of 3.7 MeV alphas should allow single-particle alpha physics to be studied now and result in a fully tested diagnostic prior to D–T operation of TFTR.

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URL: http://dx.doi.org/10.1063/1.1143705

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Neutron calibration techniques for comparison of tokamak results (1990)

Strachan, J. D. ; Adams, J. M. ; Barnes, Cris W. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 61 (1990), S. 3501-3504

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: A workshop on 1–3 August 1989 reviewed the techniques, uncertainties, and experiences of neutron calibration on PLT, TFTR, JET, Tore Supra, JT-60, JIPPT-IIU, Alcator C-Mod, ATF, FT, ASDEX, Textor, and DIII-D. In the summary session, the workshop participants discussed possible consensus neutron calibration techniques appropriate to D-D plasmas in tokamaks. The application of such techniques would facilitate a more accurate comparison of neutron yields from different devices, and also allow new calibration techniques to relate their precision to a reference value. General agreement was reached on the suitability of two techniques: (1) a 252Cf source calibration of epithermal neutron detectors, and (2) threshold neutron activation of Ni foils placed vertically above or below the plasma. This paper will present details on detector positioning, neutron transport calculations, and interlab normalization needed to accomplish the standardized calibration using a Cf neutron source.

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URL: http://dx.doi.org/10.1063/1.1141558

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