Samples (generally 3-6) with certain volume and known porosity will first gain the relation curve between NMR signal
strength and porosity (spectrum sample curve).
Since the area-under-the-curve of an NMR signal
is proportional to the number of nuclear spins causing the signal, the actual relative concentration was determined by integrating the signals at 2.0, 1.8, and 3.8 ppm and by correcting them for the number of nuclei.
CPFA concentrations were obtained by integrating the peak area of the [sup.1]H NMR signal
at -0.35 ppm and the methyl signal of the trimethylsilyl group of the internal standard (TMSD) at 0.1 ppm.
Could the composite glycosylated proteins represented by the GlycA NMR signal
directly modify HDL function in a manner that influences CVD risk?
The relaxation coefficients are the primary components that describe an NMR signal
. The primary coefficients are [T.sub.1], the spin-lattice relaxation that measures the decay of the NMR signal
due to return to thermal equilibrium, and [T.sub.2] and [T.sub.2]*, the spin-spin relaxation time and the inverse of field inhomogeneity, respectively.
Speaking of RNA-[Mn.sup.2+] interaction, we could observe a selective and progressive broadening of NMR signal
lines in the [sup.1]H NMR spectrum of tRNA in the region of 5-8 ppm where the proton signals of nitrogenous bases are located (Figure 2(d)).
Because it operates at the low-energy end of the electromagnetic spectrum, the population difference between energy levels involved in NMR transitions is exceedingly small - only a few spins per million effectively generate the NMR signal
Since MDCO-216 is believed to be discoidal rather than spherical in structure, its NMR signal
frequency cannot be used to infer its particle diameter nor can its deconvolution-derived signal amplitude be used to calculate its absolute concentration.
Using proprietary software customized for use with NMR technology, the amplitude or "volume" of the NMR signal
is directly proportional to the concentration of the particle subclass of lipoprotein particles emitting the signal.
The superconducting channel described here for NMR signal
detection has been designed to be compliant with a MEG system.
The amounts of [sup.13]C NMR signal
intensity in the aryl and O-aryl regions of the acquired spectra were used to estimate the proportion of OC present in the fractions that should be allocated to the ROC fraction.
Swelling of the coating upon water ingress was estimated by measurement of film length and by an increase in NMR signal
intensity as water molecules occupied more free volume.(8)