Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Martin J. Cohen"'
Autor:
Roger F. Wernlund, Daniel R. Kojiro, Norishige Takeuchi, Robert M. Stimac, Donald E. Humphry, Martin J. Cohen
Publikováno v:
Analytical chemistry. 63
Results are presented from a comparison between two ion-mobility-spectrometer (IMS) methods of sample ionisation: a conventional IMS with very dry helium and an IMS using metastable helium ionization. As one of the tests, a mixture of several hydroca
Publikováno v:
The Journal of Chemical Physics. 64:3935-3941
We have investigated in drift tube mass spectrometers the identity and the transport properties of ions formed in CO2 gas at pressures ranging from 10−4 to 762 torr. Under bombardment by low energy (20–100 eV) electrons in the ion source, the pri
Publikováno v:
Analytical Chemistry. 43:1441-1447
Autor:
Martin J. Cohen, Francis W. Karasek
Publikováno v:
Journal of Chromatographic Science. 8:330-337
Autor:
Joseph Petrillo, Martin J. Cohen
Publikováno v:
Science Education. 56:519-527
Autor:
G. L. Hoehn, William F. Coombs, Frank Upham, Kurt Enslein, R. J. Cox, J. D. Shipman, Gilbert S. Stubbs, R. L. Chase, S. E. Turner, R. L. Caldwell, Alvin A. Read, Marcus R. McCraven, Martin J. Cohen, Anton B. Witzel
Publikováno v:
Transactions of the Institute of Radio Engineers Professional Group on Nuclear Science. :21-24
The problem of designing a constant reactor outlet temperature control system for a thermal reactor power plant is considered. The dynamic control characteristics of the power plant are described in terns of (1) the response of reactivity to variatio
Autor:
Martin J. Cohen
Publikováno v:
Review of Scientific Instruments. 22:966-977
A new instrument, the cloud‐ion chamber, combining the functions of an ionization chamber (utilizing free electron collection) and the Wilson cloud chamber in the same gas volume has been operated successfully for a sensitive time in excess of 1000
Publikováno v:
Journal of Chromatographic Science. 9:390-392
Publikováno v:
20th International Reliability Physics Symposium.
Atmospheric pressure chemical ionization-mass spectrometry (API-MS) was used to study the characteristics and thermodynamics of positive water cluster ions, providing a basis for measuring the water vapor content of sealed integrated circuit packages
Autor:
Edward P. Cohen, Martin J. Cohen
Publikováno v:
Nature. 203
THE transfer of immunologically competent cells to an immunologically inert recipient is a technique which has been useful in the examination of the antibody-forming capacity of the donor cells. Under these conditions, circulating antibody may be fou