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  • 1
    Electronic Resource
    Electronic Resource
    Pulse radiolysis study of the reaction of OH radicals with C2H4 over the temperature range 343-1173 KWork performed under the auspices of the Office of Basic Energy Sciences, Division of Chemical Science, US-DOE under contract Number W-31-109-ENG-38. (1987)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 19 (1987), S. 25-34 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of OH and OD radicals with ethylene in the presence of 1 atm argon and 6 Torr water vapor was studied in the temperature range 343-1173 K. The results reveal three kinetically separate temperature regions: (1) 343-563 K, where the disappearance of OH radical is dominated by the addition of OH to the double bond of ethylene; (2) 563-748 K, where concurrent reactions of addition, the reverse reaction of addition and H-atom abstraction is dominant; and (3) 748-1173 K, where H-atom abstraction is likely the main reaction. The rate for hydrogen abstraction is 2.4 × 10-11 exp[(-2104 ± 125)/T] cm3/molec-s (for OD 2.1 × 10-11 exp[(-2130 ± 172)/T] cm3/molec-s). There was no obvious pyrolysis of ethylene below 1073 K. The study of OD radical with ethylene shows a small isotope effect.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550190104
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    Paper (German National Licenses)
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  • 2
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    Seismic Shaking in the North China Basin Expected From Ruptures of a Possible Seismic Gap (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-05-20
    Description: A 160-km-long seismic gap, which has not been ruptured over ~8000 year, was identified recently in North China. In this study, we use a dynamic source model and a newly available high-resolution 3-D velocity structure to simulate long period ground motion (up to 0.5 Hz) from possibly worst-case rupture scenarios of the seismic gap. We find that the characteristics of the earthquake source and the local geologic structure play a critical role in controlling the amplitude and distribution of the simulated strong ground shaking. Rupture directivity and slip asperities can result in large amplitude (i.e., 〉1 m/s) ground shaking near the fault, whereas long duration shaking may occur within sedimentary basins. In particular, a deep and closed Quaternary basin between Beijing and Tianjin can lead to ground shaking of several tens of cm/s for more than 1 minute. These results may provide a sound basis for seismic mitigation in one of the most populated regions in the world.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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  • 3
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    Response analysis of rainfall–runoff processes using wavelet transform: a case study of the alpine meadow belt (2011)
    Wiley-Blackwell
    Details
    Publication Date: 2011-02-10
    Description: Rainfall–runoff processes appear to be highly nonlinear in Bayinbluk watersheds of the northwestern China. In this study, the time-scale wavelet transform has been used for the analysis of this nonstationary system. The Haar and Morlet wavelet transform were used to analyse the rainfall–runoff conversion relationship. Wavelet power spectrum and change point methods are also employed to analyse rainfall rates and runoffs measured at daily to half-hourly sampling rate. The four experimental sites (Luoto, Haer, Kuce and Shengl) are located in the Tianshan Mountains (Xinjiang province, China). Correlation analysis and wavelet transform are first applied to runoff process in different underlying surfaces. Wavelet analyses of rainfall rates and runoffs also give meaningful information on the temporal variability of the rainfall–runoff relationship. Change point and wavelet power spectrum analysis provide simple interpretation of energy distribution between different scales. The results indicate that wavelet transform is a good method for analysing the nonlinear relationship of temporal–spatial responses between rainfall and runoff. This method allowed quantification of the processes affecting runoff and provided an insight into their implications in surface water management. Copyright © 2011 John Wiley & Sons, Ltd.
    Print ISSN: 0885-6087
    Electronic ISSN: 1099-1085
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Wiley-Blackwell
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  • 4
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    Prognostic value of body mass index before treatment for laryngeal squamous cell carcinoma (2015)
    Chinese Anti-cancer Association (CACA)
    Details
    Publication Date: 2015-12-30
    Description: Objective: Patients with head and neck cancer often suffer from malnutrition. This study aims to investigate the influence ofbody mass index (BMI) on the prognosis of laryngeal squamous cell carcinoma (LSCC). Methods: A total of 473 patients with LSCC initially treated at Sun Yat-sen University Cancer Center between January2005 and July 2009 were retrospectively reviewed. Survival analysis was performed by the Kaplan-Meier method and Coxregression model. Results: Low BMI before treatment was significantly associated with poor overall survival in patients with LSCC (P〈0.001).BMI was an independent prognostic factor for patients with LSCC. Conclusion: Leanness before treatment was associated with poor prognosis in patients with LSCC. Good nutritional statusis favorable to improve survival in patients with LSCC.
    Electronic ISSN: 2095-3941
    Topics: Medicine
    Published by Chinese Anti-cancer Association (CACA)
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