Zobrazeno 1 - 10
of 25
pro vyhledávání: '"J. Dechert"'
Autor:
Steve E. Young, Chang Samuel Hsu, Parviz Rahimi, Gary J. Dechert, Yevgenia Briker, Charles A. Spindt, Ripudaman Malhotra, Michael J. Coggiola
Field Ionization Mass Spectrometry (FIMS) has been used to characterize fossil fuels. Detailed analysis of a range of fossil fuels by FIMS has been well established at SRI through support of numerous agencies, including the Naval Research Laboratory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4e4850e8ce905b0517097c6c0b974ad
https://doi.org/10.1201/9781003075455-3
https://doi.org/10.1201/9781003075455-3
Publikováno v:
International Journal of Mass Spectrometry. 265:230-236
GC-field ionization high resolution time of flight mass spectrometry provides three-dimensional separations of complex mixtures. The first dimension is the gas chromatography retention time. This dimension can be either a boiling point scale or relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0c75439f3d9fd2cef37d904484fea2a
https://doi.org/10.1016/j.ijms.2007.02.012
https://doi.org/10.1016/j.ijms.2007.02.012
Autor:
Kuangnan Qian, and Gary J. Dechert, M. Siskin, William N. Olmstead, Kathleen E. Edwards, Norman E. Hoosain, Anthony S. Mennito
Publikováno v:
Energy & Fuels. 21:1042-1047
Field desorption (FD) ionization is studied for the measurement of the molecular weight distribution of heavy petroleum, vacuum residua, and asphaltene derived from them. Hydrocarbon polymers, heavy petroleum distillation cuts, and chemical and solub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa494f73327580b3e2f53e6d687e9916
https://doi.org/10.1021/ef060360t
https://doi.org/10.1021/ef060360t
Autor:
Gary J. Dechert, Kuangnan Qian
Publikováno v:
Analytical Chemistry. 74:3977-3983
Although mass spectrometry has been studied extensively in the past 50 years for analysis of petroleum and other fossil fuels, comprehensive characterization of total petroleum composition across a wide boiling range remains a challenge. In this work
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6ac8640b33fa3c0be4a544e3f4c588e
https://doi.org/10.1021/ac020166d
https://doi.org/10.1021/ac020166d
Publikováno v:
Energy & Fuels. 14:217-223
The presence of naphthenic acids in crude oils is of concern in the petroleum industry due to their corrosivity to refinery units. It is desirable to determine the ring type and carbon number distributions because the corrosivity of naphthenic acids
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d4ba1193ded984a3accf8a483eb3f00
https://doi.org/10.1021/ef9901746
https://doi.org/10.1021/ef9901746
Autor:
J. Dechert, C. Heiden, Alexey Kalabukhov, S.A. Gudoshnikov, A.M. Tishin, O.V. Snigirev, Jakob Bohr, S.A. Chupakhin, Michael Mück
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4385-4388
We have applied a dc SQUID based microscope to study surface magnetization of a Ho single crystal at 77 K in parallel (up to 0.4 kA/m) and perpendicular (up to 0.1 kA/m) magnetic fields. Magnetization curves and the topographic maps of the magnetic f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1f7bf70bb4070761cff85fbc68341eb
https://doi.org/10.1109/77.783996
https://doi.org/10.1109/77.783996
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4111-4114
We report on the development of a scanning SQUID microscope for measurements of samples at room temperature. A thin film niobium DC-SQUID is used with conventional read-out electronics. It is placed above the thin bottom window of a fiberglass cryost
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6995a77cc61d84cd97fca8bafa1d4f3
https://doi.org/10.1109/77.783930
https://doi.org/10.1109/77.783930
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:3143-3146
The obtainable spatial resolution of a scanning SQUID microscope depends among others on the effective SQUID area. An effective area of only a few /spl mu/m/sup 2/ is desirable as it allows for a spatial resolution of a few /spl mu/m. SQUIDs with con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6c7a041ed8264f9ad72ff957f2d5d65
https://doi.org/10.1109/77.621998
https://doi.org/10.1109/77.621998
Publikováno v:
Review of Scientific Instruments. 66:4690-4693
A number of applications of high‐temperature superconductor radio frequency superconducting quantum interference devices (rf SQUIDs) require a certain immunity of these sensors against electromagnetic interference (EMI). We have investigated effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b27cd07565608d21f27ce5711491af9
https://doi.org/10.1063/1.1145308
https://doi.org/10.1063/1.1145308