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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 10 (1970), S. 268-272 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 10 (1970), S. 282-284 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 11 (1971), S. 100-102 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical documentation 13 (1973), S. 92-98 
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 3109-3114 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Various n-InSb crystals, pure and Te doped, were prepared using the horizontal zone-refining technique. The electrical conductivity and Hall coefficient of these samples were measured as functions of temperature from 90 to 470 K. By self-consistently fitting the theoretical transport parameters to the experimental data, a set of parameters was refined and/or determined. They include the optical band-gap variation E0(T) = [0.235 − 3.2× 10−4T2/(220 + T)] eV, the heavy-hole effective mass m*hh = (0.20 ± 0.02)me, and the acoustic deformation potential Ed = (13 ± 1) eV. Various scattering mechanisms and impurity phenomena are also discussed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 3206-3210 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Abstract-coincidence counting techniques have been used in conjunction with time-of-flight mass spectrometry (TOF-MS) to study the impact of MeV/amu ions on surfaces. Several samples were studied including Au metal and a series of polymers. The results are consistent with a Coulomb explosion model for the secondary ion desorption in plasma desorption mass spectrometry. Correlations were observed between the emission of H+ and the emission of certain hydrocarbon ions from the polymer samples. These correlations indicate a chemical relation in the formation of H+ and other hydrocarbon ions and imply that low mass hydrocarbon ions are formed close to the center of the impact site during the collision of primary ion with the sample. Also, we have shown that the coincidence data contains information about the structure of the samples and that with coincidence counting, an estimate of the yield of secondary ions can be obtained without knowledge of how many primary ions strike the surface.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 8171-8176 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Coincidence counting methods were used to examine the desorption of secondary ions from a CsI surface via keV atomic and polyatomic projectile impacts. A correlation between the emission of I− and CsI−2 secondary ions was attributed to the common chemical origin of the ions. The degree to which I− and CsI−2 were correlated was observed to change as a function of the kinetic energy and complexity of the primary ion as well as the yield of I−. This is attributed to a change in the relative importance of competing ion formation processes as a function of the energy in the desorption site.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1748-1753 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe an ion source based on the spontaneous desorption process. The production, acceleration, and separation processes allow for the production of keV energy polyatomic ions while maintaining a high signal-to-background ratio. Both atomic and polyatomic ions with up to 37 keV energy were generated. Because the spontaneous desorption process is naturally pulsed, the ion source was attached to a dual time-of-flight mass spectrometer for secondary ion mass spectrometry experiments. In this article, we describe the design of both the polyatomic ion source and the mass spectrometer.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Suite 500, 5th Floor, 238 Main Street, Cambridge Massachusetts 02142, USA : Blackwell Science Inc.
    International journal of gynecological cancer 6 (1996), S. 0 
    ISSN: 1525-1438
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The object of this study was to evaluate the incidence, presenting symptoms, treatment, and survival of patients with recurrence of ovarian carcinoma at the vaginal apex. The charts of 19 patients with recurrent ovarian carcinoma at the vaginal apex diagnosed and treated between January, 1971 and December, 1993 were reviewed retrospectively. Statistical analysis was carried out using the nonparametric Wilcoxon rank-sum test and survival rates were calculated using the Kaplan-Meier method. Nineteen of 393 patients (4.8%) with recurrent ovarian carcinoma were found to have recurrent tumor involving the vaginal apex. Nine patients (47%) were symptomatic from the vaginal recurrence: eight patients experienced vaginal bleeding, one had abnormal discharge, and one patient had symptoms related to a rectovaginal fistula in addition to vaginal bleeding. Ten patients (53%) had an asymptomatic mass found on follow-up examination or at the time of second-look laparotomy. Fifteen of 19 patients underwent surgical exploration: eight had recurrent disease isolated to the vaginal apex, four had vaginal apex and pelvic disease, two had disease at the vaginal apex and in the upper abdomen, and one had disease present diffusely throughout the abdomen and pelvis in addition to the vaginal recurrence. Median time from original diagnosis to the diagnosis of a vaginal apical recurrence was 26 months. As of December, 1993, 15 of 19 patients had died of disease and four of 19 patients were alive with disease. The 1-year survival rate from the time of diagnosis of vaginal recurrence was 66% (95% confidence interval: 43–88%); 56% for patients with vaginal bleeding and discharge and 78% for those with asymptomatic masses. Mean survival time was at least 19 months. Patients presenting with a vaginal apex recurrence of ovarian carcinoma should be treated aggressively, especially if symptomatic, since they are likely to survive for at least 1 year following the recurrence.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 4133-4135 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The phase transformation of NdFeB melt-spun alloys with low Nd content of 4–8 at. % was investigated by thermomagnetic analysis and x-ray diffractometry. Experimental results have shown that the metastable Nd2Fe23B3 compound formed in the alloys is considered to be transformed to Nd2Fe23B3+α-Fe+Fe3B in the temperature range of 550–690 °C, α-Fe+Fe3B+Nd1+eFe4B4 in the temperature range of 690–730 °C and finally α-Fe+Nd1+eFe4B4 above 840 °C. From the results, it has been concluded that Nd2Fe14B is not formed from metastable Nd2Fe23B3. On the other hand, the melt-spun alloy of Nd2Fe23B3 (∼Nd7.1Fe82.1B10.7) annealed under optimum conditions has been found to be composed of α-Fe, Fe3B, and Nd2Fe14B phases. The alloy has a coercivity comparable to Fe3B-based Nd4Fe77B19 and relatively high-energy product of about 71.6 kJ/m3 (∼9 MG Oe). © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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