Kestoses (D-fructofuranosyl derivatives of sucrose) are produced by a variety of plants, including tulip bulbs l, Jerusalem artichoke2, asparagus3, and banana fruit4. Kestoses have also been reported to be produced by the action of invertase (and related hydrolase enzymes) on incubation with sucrose
Detection of tacticity in polypropylenimine by 13C n.m.r.
β Scribed by J.G. Hamilton; K.J. Ivin; L.C. Kuan-Essig; P. Watt
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 170 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0032-3861
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## Abstract Carbonβ13 n.m.r. spectra of formic, acetic, propionic and butyric acid amides with __N__,__N__βdiβ__n__βalkyl substituents have been completely assigned with the aid of extensive double resonance experiments. The data obtained were used to study long range steric effects on chemical and
## Abstract ^13^C n.m.r. chemical shifts and one bond ^13^C, ^1^H coupling constants for cyclopropene and its 1β and 3βmethyl derivatives as well as for methyl cyclopropane have been measured. The data for cyclopropene are 108Β·9 ppm and 228Β·2 Hz, 2Β·3 ppm and 167Β·0 Hz in the olefinic and allylic pos