Orientation of the Chemical Shielding Anisotropy Tensor of the Carbonate Carbon in Diphenyl Carbonate and Its Consequences for NMR Studies on Polycarbonate

1998 ◽  
Vol 31 (17) ◽  
pp. 5818-5822 ◽  
Author(s):  
P. Robyr ◽  
M. Utz ◽  
Z. Gan ◽  
C. Scheurer ◽  
M. Tomaselli ◽  
...  
Keyword(s):  
Diphenyl Carbonate ◽  
Chemical Shielding ◽  
Nmr Studies ◽  
Carbonate Carbon ◽  
Anisotropy Tensor

Mercury-199 nuclear magnetic resonance relaxation in some mercury(II) compounds

1982 ◽  
Vol 60 (16) ◽  
pp. 2113-2117 ◽  
Author(s):  
Roderick E. Wasylishen ◽  
Robert E. Lenkinski ◽  
Charles Rodger
Keyword(s):  
Nuclear Magnetic Resonance ◽  
High Field ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Nuclear Magnetic Resonance Relaxation ◽  
Chemical Shielding ◽  
Nmr Studies ◽  
Spin Lattice ◽  
Resonance Relaxation

Mercury-199 spin-lattice relaxation times are reported for several mercury(II) compounds at 5.875 and 9.40 T. From the field dependence of T1, in Hg(CN)2, Hg(CH3)2, and Hg(C6H5)2, 199Hg chemical shielding anisotropies of 3800, 5820, and 5800 ppm are calculated. The errors in these of estimates of Δσ are at least 10%. Some implications of the large Δσ(199Hg) values in high field nmr studies are discussed.

NMR studies of the R2 repeat and related peptide fragments of the DNA binding domain of c-Myb. New light on the structure and folding of R2.

1999 ◽  
Vol 96 (9/10) ◽  
pp. 1580-1584 ◽  
Author(s):  
I. Ségalas ◽  
S. Desjardins ◽  
H. Oulyadi ◽  
Y. Prigent ◽  
S. Tribouillard ◽  
...  
Keyword(s):  
Dna Binding ◽  
Binding Domain ◽  
Dna Binding Domain ◽  
Peptide Fragments ◽  
Nmr Studies ◽  
Related Peptide

2D NMR studies on muscle and cerebral metabolism in vivo

1994 ◽  
Vol 91 ◽  
pp. 697-703 ◽  
Author(s):  
B Gillet ◽  
BT Doan ◽  
C Verre-Sebrie ◽  
O Fedeli ◽  
JC Beloeil ◽  
...  
Keyword(s):  
Cerebral Metabolism ◽  
2D Nmr ◽  
Nmr Studies

NMR STUDIES OF CONCENTRATED LITHIUM-AMMONIA SOLUTIONS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-32-C8-35
Author(s):  
Y. Nakamura ◽  
M. Niibe ◽  
M. Shimoji
Keyword(s):  
Nmr Studies

NMR STUDIES OF Co-BASED NITRIDE AMORPHOUS FILMS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1713-C8-1714
Author(s):  
K. Le Dang ◽  
P. Veillet ◽  
H. Sakakima ◽  
R. Krishnan
Keyword(s):  
Amorphous Films ◽  
Nmr Studies

Physico-Chemical Properties of Recombinant Desulphatohirudin

1990 ◽  
Vol 63 (03) ◽  
pp. 499-504 ◽  
Author(s):  
A Electricwala ◽  
L Irons ◽  
R Wait ◽  
R J G Carr ◽  
R J Ling ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Gel Filtration ◽  
Chemical Properties ◽  
Alpha Helix ◽  
Apparent Molecular Weight ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Recombinant Hirudin ◽  
Physico Chemical ◽  
Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

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