✦ LIBER ✦

Contribution of 13C-NMR spectroscopy to the elucidation of pathways of propionate formation and degradation in methanogenic environments

✍ Scribed by Alfons J.M. Stams; Cor Dijkema; Caroline M. Plugge; Piet Lens

Book ID: 110262466
Publisher: Springer Netherlands
Year: 1998
Tongue: English
Weight: 112 KB
Volume: 9
Category: Article
ISSN: 0923-9820
DOI: 10.1023/a:1008342130938

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Application of 13C nmr spectroscopy to t

Application of 13C nmr spectroscopy to the elucidation of the electrochemical oxidation mechanism of the l-ascorbic and d-araboascorbic acids

✍ Carmen Acerete; Lluis Garrigos; Joaquin Guilleme; Ernesto Diez; Antonio Aldaz 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 414 KB

A&met-The previously proposed electrochemical oxidation mechanism of the L-ascorbic and D araboascorbic acids in basic medium must be rejcckd because of the variation in the carbon chemical shifts and coupling constants with the pH, which shows that the supposed rupture of the furanose rings at pH -

Degradation of softwood [14C lignin] lig

Degradation of softwood [14C lignin] lignocelluloses and its relation to the formation of humic substances in river and pond environments

✍ Eliane Fustec; Eric Chauvet; Gilbert Gas; Daniel Lacaze; Michèle Escautier 📂 Article 📅 1988 🏛 Springer 🌐 English ⚖ 597 KB

The fate of lignin in water and sediment of the Garonne river (France) and of a pond in its floodplain was examined using specifically labeled [4C-lignin] lignocelluloses. No significant differences appeared in the mineralization rate of alder, poplar or willow [' 4 C-lignin] in running water sample

Inter- and intra-molecular contributions

Inter- and intra-molecular contributions of neighboring dipolar pairs to the precise determination of interatomic distances in a simple [13C, 15N]-peptide by 13C, 15N-REDOR NMR spectroscopy

✍ A. Naito; K. Nishimura; S. Tuzi; H. Saitô 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 475 KB

Both 13C-and 15N-REDOR experiments were performed to determine the '3C-'5N interatomic distance in [ I-"C]N-acetyl-Pro-[ '5N]GIy-Phe crystal and to evaluate the inter-or intra-molecular dipolar contributions leading to its errors. The interatomic distance was determined to be 3.43 8, after removing

Application of two-dimensional NMR spect

Application of two-dimensional NMR spectroscopy to the complete analysis of the 1H and 13C NMR spectra of d-biotin in aqueous solution

✍ Mitsuhiko Ikura; Kunio Hikichi 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 846 KB

## Abstract The ^1^H and ^13^C NMR spectra of __d__‐biotin were observed at 400 and 100 MHz, respectively. Various types of two‐dimensional NMR spectroscopy were performed to assign the spectra. The previous assignment of ^13^C NMR spectrum of __d__‐biotin reported by Bradbury and Johnson was modif

Application of Solid-State 13C NMR Spect

Application of Solid-State 13C NMR Spectroscopy and Dipolar Dephasing Technique to Determine the Extent of Condensation in Technical Lignins

✍ T. Liitiä; S.L. Maunu; J. Sipilä; B. Hortling 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 241 KB

Solid-state 13 C NMR spectroscopy and dipolar dephasing technique was used to determine the extent of condensation in various technical lignins. The accuracy of dipolar dephasing method was first investigated with the aid of some lignin model compounds and two various methods to determine the degree

Improved methods for assignment of multi

Improved methods for assignment of multiplicity in 13C NMR spectroscopy with application to the analysis of mixtures

✍ David J. Cookson; Brian E. Smith 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 587 KB

## Abstract Improved methods for the assignment of resonance multiplicity in ^13^C NMR spectra are described. Assignments are achieved either by direct observation of resonance intensity modulations resulting from gated spin echo (GASPE) experiments, or from the derivation of ‘selected multiplet’ s