A fraction of tobacco smoke condensate has been separated by GC-MS analysis on glass capillary columns. The capillary column is coupled directly to the mass spectrometer, omitting the carrier gas separator. A technique is described which allows the determination of the exact masses even on minor ...
Step 1)Obtain an exact mass for the monoisotopic peak, gather elemental information from the A+1 and A+2 peaks. Look at the A+1 peak to estimate the number of carbon atoms, see the spectrum below. To estimate the number of carbons in this compound, divide 21.7 by 1.1. The estimate ...
R.: Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh-resolution FT-ICR mass spectrometry, Atmos. Chem. Phys., 13(24), 12343-12362, doi:10.5194/acp-13-12343-2013, 2013. Zobrist, B., Marcolli, C., Pedernera, D. and Koop, T.: Do ...
The exact solution of the anti-symmetric quadratic truly nonlinear oscillator is derived from the first integral of the nonlinear differential equation which governs the behavior of this oscillator. This exact solution is expressed as a piecewise function including Jacobi elliptic cosine functions. The ...
Decays of Scalar and Pseudoscalar Higgs Bosons into Fermions: Two-loop QCD Corrections to the Higgs-Quark-Antiquark Amplitude The results hold for arbitrary four-momentum squared, q2, of the Higgs boson and of the heavy-quark mass, m. Moreover, we derive the approximate ... W Bernreuther,...
New classes of exact solutions of nonlinear sets of equations of the theory of heat and mass transfer in reactive media and mathematical biology are described. Various sets of the general form are considered, in which the chemical reaction rates depend on two or three arbitrary functions. Among ...
Six and twelve months later, we made records of apnea hypopnea index (AHI), lowest arterial oxygen saturation (LSaO2), body mass index (BMI), the shortest sagittal diameter, and transverse diameter, and the effective rates of exercising were calculated and compared with the 21 patients without...
This work is of much importance because lattice anharmonicity has been found to play a crucial role in high Tc superconductors. In fact, it has been observed that apex oxygen has a substantial anharmonic motion in the cuprates and also the phonon anharmonicity makes a significant impact on the...
将“atmospheric condition"翻译成中文.例句:Degradation of atmospheric conditions as a common concern of humankind ↔ 大气条件退化是人类的共同关切
Most owners of Deere 1890/1895single disc drills have a good opportunity to bring more bushels to the elevator every year. Yielder drillsoften outperform Deere 1890’s by 20 bushels per acre at Walla Walla, Washington. That is a lot of money in today’s economics.The first Yielderdrillsare...