In the preferred and illustrated embodiments hereof, a method and apparatus for conducting NMR moisture measurements is set forth. In various forms, hydrogen transient NMR signal peak amplitude values indicative of total hydrogen concentration of the tested material space. The hydrogen concentration is ...
The presence of wind enhances the evaporative heat transfer due to enhanced evaporation rate and results in additional cooling that is desirable in periods of peak performance. Read more View chapterExplore book Test methods for bio-based building materials In Performance of Bio-based Building ...
sF(oFTlivIgeRudrsecpeSelc1lut)rl.oaAsoelfl, signals attributed to stearoyl groups exhibit increasing intensities with higher DS, while the intensity of the FTIR band attributed to stretching vibrations of hydroxyl groups decreases and the peak maximum is shifting to higher wavenumbers. In comparison ...
NMR spectra always present the only peak of chemical shift of dissociated Na+ion coupled with a gradual positive shift based on shielding effect, demonstrating that Na+ion can keep dissociated hydrated state in such wide range (167% ~50%) but surrounding water molecules will be reduced. Further...
At aw = 0.43, where the lactose has crystallised, a considerable drop in intensity in this peak was observed. Water of crystallisation, which would be present in the crystalline lactose, has very short relaxation times and is not detected in low-field NMR measurements as used in this study....
From the T2 inversion spectra and peak areas of LF-NMR, it illustrated that the free water was the main form of water in the osmotically dehydrated strawberries, and there were also a small amount of bound water and immobile water. With the drying procedure proceeded, the T2 peak of the ...
solid evidence to confirm the proposing polymer structure, which included the benzyl amide terminus (Supplementary Fig.32). Increasing the feeding monomer-to-initiator (M/I) from 20/1 to 50/1 resulted in a clear shift of the unimodal peak to higherMnin aqueous SEC, suggesting good ...
liquid-state13C NMR and 2D NMR spectra of long chain fatty acid esters of cellulose with low and intermediate DS are scarcely performed in contrast to cellulose esters with short alkane chains (<6 carbons)30,31,32,33,34. For the liquid-state NMR analysis of CSEs as well as the solvent-...
The NMR spectra (not shown) for samples of different aw indicated that sorbed water produced an increase in the relative intensity of the narrow component of the peak (representing mobilized water) and a decrease in the relative intensity of the broad component of the peak (representing immobile...
It is further preferred that the resinous portion of the hydroxyl-functional resin (i) have a number average molecular weight (Mn) of about 1,500 to 15,000 when measured by gel permeation chromatography (GPC), the neopentamer peak being excluded from the measurement. In this molecular weight...