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  • 1
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    Sources of magnetic fields in recurrent interplanetary streams (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The paper examines sources of magnetic fields in recurrent streams observed by the Imp 8 and Heos spacecraft at 1 AU and by Mariner 10 en route to Mercury between October 31, 1973 and February 9, 1974, during Carrington rotations 1607-1610. Although most fields and plasmas at 1 AU were related to coronal holes and the magnetic field lines were open in those holes, some of the magnetic fields and plasmas at 1 AU were related to open field line regions on the sun which were not associated with known coronal holes, indicating that open field lines may be more basic than coronal holes as sources of the solar wind. Magnetic field intensities in five equatorial coronal holes, certain photospheric magnetic fields, and the coronal footprints of the sector boundaries on the source surface are characterized.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research; 83; Sept. 1
    Format: text
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  • 2
    Electronic Resource
    Electronic Resource
    The role of surface thermodynamics in thromboresistance of biomaterials (1975)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 9 (1975), S. 127-142 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: A thermodynamic approach to the problem of platelet adsorption out of a suspension on to a smooth and homogeneous solid surface is developed. The interfacial tension values required may be estimated from contact angle data by means of an equation of state relation. According to the thermodynamic approach the functional dependence of platelet adsorption on surface tension of the solid differs according to whether the surface tension of the platelets is smaller or larger than the surface tension of the liquid in which they are suspended. The implications of this thermodynamic approach in situations where plasma proteins are present and the biomaterials surfaces may be heterogeneous and rough are discussed. Previous analyses using the critical surface tension of wetting and other surface-related parameters are compared with the thermodynamic analysis given here.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820090203
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rearrangements and fragmentations of [C2H5S]+ ionsPart II: for Part I, see Ref. 1. (1979)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1979), S. 543-549 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From deuterium labelling experiments it was concluded that metastable molecular ions of ethyl methyl sulfide lose a methyl radical with the formation of both [CH3S=CH2]+ amd [CH3CH=SH]+· The fragmentation reactions of metastable ions generated with these structure are losses of C2H2, H2S and CH4. These reactoins and the preceding isomerizations have also been studied by means of deuterium labelling. From the results it is concluded that the three fragmentation reactions most probably occur from ions with a C—C—S skeleton. Appearance energy measurements for ions generated with the two structures above and all give rise to the same ΔHf value for these three isomeric forms. Ab initio molecular orbitals calculations confirm that these three ions fortuitously have very similar heats of formation. A potential energy diagram rationalizing the isomerizations and the principal fragmentation reaction is presented.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210141006
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectrometry of N-nitrosaminesResearch sponsored by the Energy Research and Development Administration under contract with the Union Carbide Corporation. (1978)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1978), S. 395-408 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of a series of N-nitrosamines for carcinogenicity studies presented an opportunity to study mass spectral fragmentation schemes in detail. Condensed spectra are listed for 146 N-nitrosamines of widely differing structures, including nitroso derivatives of commercial drugs and insecticides. Aliphatic nitrosamines were generally characterized by molecular ions and loss of OH. Subsequent fragmentation via α-cleavage is similar to that of aliphatic amines. The loss of OH is believed to result in a cyclic ion. Substituted aliphatic nitrosamines varied in fragmentation schemes with structure and position of the substituent groups. However, most showed α-cleavage at some point in fragmentation. When substituted with aromatic groups, prominent peaks due to the aromatic moiety were observed. The alicyclic nitrosamines showed losses of NO, NOH and OH and subsequent α-cleavages. Nitrosamides were characterized by rupture of the carbonyl to nitrogen bond. Spectra of substituted ureas usually showed charge retention by the carbonyl fragment, while carbamate esters showed ions from both fragments.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200050606
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  • 5
    Electronic Resource
    Electronic Resource
    Chemische Reaktionen in Salzschmelzen. XVIII. Die Synthese des Methylzinntrichlorids, CH3SnCl3 (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 444 (1978), S. 21-29 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemical Reactions in Molten Salts. XVIII. Synthesis of Methyltin Trichloride, Ch3SnCl3A process for the synthesis of CH3SnCl3 by reaction of molten SnCl2 and CH2Cl infused salts is described. Out of the systems investigated with NaCl, KCl, AlCl3, ZnCl2, KZnCl3, LiAlCl4, NaAlCl4, KAlCl4, and CuAlCl4, the systems with NaAlCl4 and NaAlCl4/KAlCl4 proved best. We measured the space-time-yield (RZA) as a function of the salts admixed to SnCl2 as well as a function of the reaction temperatur, gasification, and inlet rate of CH3Cl respectively. The optimum reaction conditions are investigated and the system SnCl2//NaAlCl4 is described.
    Notes: Ein Verfahren zur Synthese von CH3SnCl3 durch Reaktion von geschmolzenem SnCl2 mit CH3Cl in Salzschmelzen wird beschrieben. Von den untersuchten Systemen mit NaCl, KCl, AlCl3, ZnCl2, KZnCl3, LiAlCl4, NaAlCl4, KAlCl4 und CuAlCl4 erwiesen sich als besonders vorteilhaft NaAlCl4 und NaAlCl4/KAlCl4. Gemessen wurde die Abhängigkeit der Raum-Zeit-Ausbeute (RZA) vom Zusatz von Fremdsalz zum SnCl2 sowie von der Reaktions-Temperatur, der Begasung und der Einleitgeschwindigkeit von CH3Cl, und die optimalen Versuchsbedingungen bestimmt. Das System SnCl2/NaAlCl4 wird beschrieben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784440102
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  • 6
    Electronic Resource
    Electronic Resource
    Substitutionsreaktionen mit SchwefeldiimidenProfessor Fritz Seel zum 60. Geburtstage am 21. September 1975 gewidmet (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 416 (1975), S. 306-310 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substitution Reactions with Sulphur DiimidesSubstituted sulphur diimides are obtained by the reactions of (CH3)3Si—N=S=N—Si(CH3)3 with CH3SO2Cl and CCl3SCl or with P2O3F4 and (CH3)3Si—N=S=N—SN(CH3)2. S4N4 reacts with (CH3)2Si[N(CH3)2]2 to from (CH3)2Si(N(CH3)2)—N=S=N—SN(CH3)2 while S3N2Cl2 yields (CH3)2Si(Cl)—N=S=N—SN(CH3)2.It is possible to substitute the chlorine atom by diethylamine in the last compound.The new compounds are intermediates for the syntheses of cyclic sulphur-nitrogen compounds. They were characterized by mass-, ir-, 1H-nmr spectra and elemental analysis.
    Notes: Substituierte Schwefeldiimide werden durch Umsetzung von (CH3)3Si—N=S=N—Si(CH3)2 mit CH3SO2Cl und CCl3SCl oder von P2O3F4 mit (CH3)3Si—N=S=N—SN(CH3)2 dargestellt. S4N4 bzw. S3N2Cl2 reagieren mit (CH3)2Si[N(CH3)2]2 zu (CH3)2Si(N(CH3) 2)—N=S=N—SN(CH3)2 und (CH3)2Si(Cl)—N=S=N—SN(CH3)2.In der letzten Verbindung kann man das Chloratom durch Diäthylamin substituieren. Die neuen Verbindungen stellen Zwischenprodukte für die Synthese cyclischer Schwefel-Stickstoff- Verbindungen dar. Sie wurden durch Massen-, IR-, 1H-NMR-Spektren und Elementaranalysen charakterisiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754160315
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  • 7
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    MSFC solar activity predictions for satellite orbital lifetime estimation (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The procedure to predict solar activity indexes for use in upper atmosphere density models is given together with an example of the performance. The prediction procedure employs a least square linear regression model to generate the predicted smoothed vinculum R sub 13 and geomagnetic vinculum A sub p(13) values. Linear regression equations are then employed to compute corresponding vinculum F sub 10.7(13) solar flux values from the predicted vinculum R sub 13 values. The output is issued principally for satellite orbital lifetime estimations.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 378-384
    Format: text
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  • 8
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    A solar plasma stream measured by DRVID and dual-frequency range and Doppler radio metric data (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: S- and X-band DRVID, S- and X-band dual-frequency range (SX(p)), and Doppler (SX(p)) measured a 15-fold increase in the line-of-sight electron content of the solar plasma above the normal plasma background. A general increase in the plasma electron content continued for nearly 50 hours: it started about 12:00 (GMT) on 12 March 1976 and continued to grow until 17:00 (GMT) on 14 March. For the next 55 hours, between 17:00 (GMT) on 14 March to 00:54 (GMT) on 17 March, the plasma level diminished as the background level was approached. Not only were the temporal changes and absolute level of the plasma content measured but the measurements were also used to ascertain the mean-plasma-concentration location: it was estimated to be 4.1 light minutes from earth.
    Keywords: SOLAR PHYSICS
    Type: The Deep Space Network; p 43-54
    Format: text
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  • 9
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    Electromagnetic instabilities driven by unequal proton beams in the solar wind (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The paper sets forth a numerical investigation of the linear dispersion relation for typical solar wind conditions at 1 AU during those times (high-speed streams) when a secondary beam of protons drifting relative to the main proton component is present. Three beam-driven instabilities were found to occur as the beam drift velocity approaches the Alfven speed: (1) a pure, field-aligned magnetosonic wave that is most important at relatively high beta and/or high beam drift speeds; (2) an oblique magnetosonic wave having highest growth rates 15-30 deg from the magnetic field; and (3) an oblique Alfven wave having maximum growth rates at increasing angle to the magnetic field. The linear growth rates for the field-aligned magnetosonic and the Alfven oblique modes are investigated as a function of relative beam density, varying anisotropic pitch angle distributions for the various components, electron temperature, and electron heat flux.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research; 81; June 1
    Format: text
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  • 10
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    Observation of an impulsive solar X-ray burst from a coronal source (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observations of the spatial, spectral, and temporal structure of an impulsive hard X-ray source in a behind-the-limb solar flare have been made with high-time-resolution hard X-ray detectors aboard two spacecraft, the International Sun Earth Explorer 3 (ISEE 3) and the Pioneer Venus Orbiter (PVO), which were separated in heliographic longitude by about 12.5 deg. The principal findings are that (1) the coronal part of the X-ray source is about 600 times less intense than the lower-altitude part of the source; and (2) the coronal X-ray observations are consistent with a power-law electron spectrum which extends down to about 5 keV.
    Keywords: SOLAR PHYSICS
    Type: Astrophysical Journal; vol. 233
    Format: text
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