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Supramolecular structure and anomer‐selective formation of polyglucuronic acid

“…The aqueous solution prepared from the solid glucuronic acid sodium salt had an unadjusted pH of 6, and the C NMR spectrum in solution (Fig. (b)) is similar to the spectrum reported in the literature for glucuronic acid sodium salt in D 2 O . The spectrum contains 12 peaks, six for each of the α and β anomers of the glucuronic acid monomer, which form by the mutarotation process that takes place in aqueous solution.…”

“…The peak intensities are similar for both anomers. The assignment of the peaks is done based on literature reported values; thus the peaks at 178.1 ppm and 177.1 ppm represent the carboxylate group at the C6 atom, and the peaks at 97.2 ppm and 93.4 ppm are assigned to the C1 carbon atoms for the β anomer and for the α anomer, respectively (see Figs (a) and (b) for carbon numbers). The other grouped peaks in the region 70–80 ppm correspond to the resonances of the ring carbon atoms C2–C5 …”

A possible origin of kilohertz quasi-periodic oscillations in low-mass X-ray binaries

“…The above-mentioned warp resonant instability can be interpreted as a particular case of a more general resonant instability (Kato 2013(Kato , 2014. The latter instability is called here and hereafter "wave-wave resonant instability in deformed disks".…”

“…The latter instability is called here and hereafter "wave-wave resonant instability in deformed disks". The instability condition can be expressed in a quite simple form (Kato 2013). For this resonant instability to work, the disk deformation required is not restricted only to a warp (and eccentric deformation), but also other types of disk deformations are allowed, if there are disk oscillation modes which satisfy necessary instability conditions.…”

Enhanced interlayer interaction in cellulose single nanofibre and poly(l-lactic acid) layered films by plasma-initiated surface grafting of poly(acrylic acid) onto poly(l-lactic acid) films

“…This finding shows promise for the use of PLLA and CSNF layered films as new packaging materials. CSNF originate from natural cellulose and are degradable [8,9]. Natural cellulose is the most abundant biomass, and consists of slender microfibrils with diameters ranging from 2 to 20 nm depending on their biological origin [10].…”