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13C Scrambling of [5-13C]5-cyclodecynone
Tetrahedron Letters, 2000Scrambling of [5-13C]5-cyclodecynone occurs as a result of acidic conditions that preclude its rapid consumption.
Michael F Wempe, John R Grunwell
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Side chain dynamics monitored by 13C-13C cross-relaxation
Journal of Biomolecular NMR, 2004A method to measure (13)C-(13)C cross-relaxation rates in a fully (13)C labeled protein has been developed that can give information about the mobility of side chains in proteins. The method makes use of the (H)CCH-NOESY pulse sequence and includes a suppression scheme for zero-quantum (ZQ) coherences that allows the extraction of initial rates from ...
Houben, K., Boelens, R.
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13C-Labelled (±±)-Catechin From Potassium [13C]Cyanide
European Journal of Organic Chemistry, 2000Racemic 4-[13C]catechin 14 has been synthesized in ten steps starting from potassium [13C]cyanide. The intermediate chalcone 9 was formed by acylation of the benzylated phloroglucinol 7 with the caffeic acid synthon 6, using the trifluoroacetic mixed anhydride.
Bastien Nay +6 more
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Phytochemistry, 1984
Abstract Labelling experiments with [2- 13 C]- and [1,2- 13 C]acetate showed that both photopigments of Anacystis nidulans , chlorophyll a and phycocyanobilin, share a common biosynthetic pathway from glutamate. The fate of deuterium during these biosynthetic events was studied using [2- 13 C, 2- 2 H 3 ]acetate as a precursor and determining the ...
Norman G. Lewis +2 more
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Abstract Labelling experiments with [2- 13 C]- and [1,2- 13 C]acetate showed that both photopigments of Anacystis nidulans , chlorophyll a and phycocyanobilin, share a common biosynthetic pathway from glutamate. The fate of deuterium during these biosynthetic events was studied using [2- 13 C, 2- 2 H 3 ]acetate as a precursor and determining the ...
Norman G. Lewis +2 more
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M1 from factors of 13C, 13C and 15N
Nuclear Physics A, 1981Abstract Core polarization effects are shown to explain both the reduction of the second peak of the M1 form factor of 13 C(e,e) 13 C and the enhancement of that of 12 C(e,e') 12 C (1 + , T = 1, 15.1 MeV) over the Cohen-Kurath predictions.
T. Suzuki, H. Hyuga, A. Arima, K. Yazaki
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Nature, 1973
Carbon-13 NMR Spectroscopy. By J. B. Stothers. Pp. xi + 559. (Academic: New York and London, November 1972.) $24.
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Carbon-13 NMR Spectroscopy. By J. B. Stothers. Pp. xi + 559. (Academic: New York and London, November 1972.) $24.
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One-Bond 13C-13C Spin-Spin Coupling Constants
1995Publisher Summary Developments in nuclear magnetic resonance (NMR) instrumentation combined with the introduction of the Fourier transform (FT) pulse technique allows to measure 13C-13C couplings at natural abundance of 13C isotope. The pulse sequences, such as the one- and two-dimensional incredible natural abundance double quantum transfer ...
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