An investigation of influence of cryogenic treatment on extremely dilute aqueous solution of poly(vinyl alcohol) (PVA) was performed by viscometry. The solution was frozen in liquid nitrogen or in a freezer at 025ЊC, then thawed at ambient temperature and concentrated by evacuation. The viscosity of
✦ LIBER ✦
Vibrational coupling as diagnostic for intramolecular hydrogen bonds of carbohydrates in aqueous solution
✍ Scribed by Pedro Carmona; M. Molina; N. Aboitiz; C. Vicent
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2002
- Tongue
- English
- Weight
- 101 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0006-3525
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## Abstract 7‐[2‐(4‐morpholinomethyl)butanoyl]‐4‐methyl‐2__H__‐1, 4‐benzoxazin‐3 (4__H__)‐one hydrochloride (2a) (a new elevated high density lipoproteins agent) and related compounds have been studied by NMR spectroscopy. Compound 2a exhibits an intramolecular hydrogen bond between the NH^+^ and C