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61.
D. J. McMillan J. H. Hamilton M. Mladjenović J. C. Manthuruthil J. J. Pinajian 《Zeitschrift für Physik A Hadrons and Nuclei》1971,241(2):103-116
The conversion electron spectrum from the decay of156Tb to156Gd was measured with an iron, double-focusing spectrometer. TheK conversion coefficient of the 1222.4 keV transition was measured relative to theK conversion coefficient of the 661.6 keV transition in137Cs and found to be 0.00174±0.00013. This result was used to normalize electron and gamma-ray data to obtain theK conversion coefficients of 33 transitions in156Gd. The 1009.6 and 1040.6 keV transitions have largeE0 components. 相似文献
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64.
J. E. McMillan 《Mathematische Annalen》1967,173(4):275-280
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Somayazulu M Madduri A Goncharov AF Tschauner O McMillan PF Mao HK Hemley RJ 《Physical review letters》2001,87(13):135504
Simple molecular solids become unstable at high pressures, typically transforming to dense framework and/or metallic structures. We report formation of an unusual ionic solid NO(+)NO(3)(-) (nitrosonium nitrate) from N(2)O at pressures above 20 GPa and temperatures above 1000 K. Synchrotron x-ray diffraction indicates that the compound crystallizes with a structure related to the aragonite form of CaCO(3) and NaNO(3). Raman and infrared spectroscopic data indicate that the structure is noncentrosymmetric and exhibits a strong pressure dependent charge transfer and orientational order. 相似文献
67.
Hayward Tammy Kay Hamilton Jenny Tholudur Arun McMillan James D. 《Applied biochemistry and biotechnology》2000,84(1-9):859-874
Researchers studying cellulase enzymes for the economical production of fuel ethanol envision cellulose as the carbon source.
However, submerged Trichoderma reesei cultures grown on cellulose exhibit high run-to-run variability. Thus, an investigation of 30 batch cellulase production
experiments was instrumental in determining fermentation conditions that improved enzyme titers, yields, and productivities.
Eighteen of the 30 batch experiments experienced minimal process upsets and were classified into eight groups based on agitation
rate, gas sparge rate, and the use of oxygen supplementation. Comparing corn steep liquor with yeast extract/peptone also
tested the effect of different sources of nitrogen in the media. Average 7-d enzyme titers were doubled from 4 to 8 FPU/mL
primarily by increasing aeration. 相似文献
68.
Andrew J. Pugsley Andrea Sella Paul F. McMillan 《Journal of solid state chemistry》2011,184(9):2345-2352
We present results of an XAS and EXAFS study of the synthesis of Ge nanoparticles formed by a metathesis reaction between Mg2Ge and GeCl4 in diglyme (diethylene glycol dimethyl ether). The progress of the formation reaction and the products formed at various stages in the processing was characterised by TEM and optical spectroscopy as well as in situ XAS/EXAFS studies using specially designed reaction cells. 相似文献
69.
Hill GL Bailey E Stennett MC Hyatt NC Maddrell EM McMillan PF Hriljac JA 《Journal of the American Chemical Society》2011,133(35):13883-13885
The simultaneous application of high pressure and high temperature has been used to achieve direct ion exchange of large cesium cations for the small sodium cations found in the zeolite natrolite by putting it into a superhydrated state with increased pore size. The larger cations remain trapped upon pressure release, and thus, this method is a means of producing new cationic forms of zeolites. 相似文献
70.
R. W. McMillan 《International Journal of Infrared and Millimeter Waves》1993,14(5):931-948
Several atmospheric hazards, including wind shear, clear-air turbulence, and wake vortices cause special problems for aircraft. These phenomena are usually characterized by a change in temperature relative to ambient, which may be detected by a millimeter wave radiometer operating on an absorption line in the atmosphere. Because of available componentry with excellent performance and relative freedom from interference by water vapor, the family of oxygen absorptions centered near 60 GHz is considered the best atmospheric feature on which the design of such an instrument could be based. This paper describes a multi-channel radiometer operating near 60 GHz which should be capable of detecting the hazards mentioned above as well as other potential dangers such as the passage of strong fronts and other severe weather. It is shown that a carefully designed instrument will be capable of measuring range to a hazard to an accuracy of about 5 percent and temperature difference to an accuracy of approximately half the actual measured difference, depending on range and temperature. An actual design is proposed, and graphs of expected performance are included. 相似文献