Results 251 to 260 of about 68,942 (307)
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Investigation of 15N by the reactions 11B(7Li, t)15N and 10B(7Li, d)15N
Nuclear Physics A, 1976Abstract The 15N nucleus was investigated by two reactions at 24 MeV bombarding energy. The angular distributions were analysed by direct reaction and compound nucleus reaction model. The level structure of 15N up to 17 MeV could be explained in the presently known framework.
W. Kohler +2 more
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Journal of Biomolecular NMR, 2000
NMR studies of protein structures require knowledge of spectral assignments through correlation spectroscopy and the measurement of dipolar interactions by NOESY-type experiments. In order to obtain NOEs for protons with degenerate chemical shifts, which is particularly common for large proteins with significant helical content, 3D and 4D 15N/15N ...
Sze, K, Xia, Y, Zhu, G
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NMR studies of protein structures require knowledge of spectral assignments through correlation spectroscopy and the measurement of dipolar interactions by NOESY-type experiments. In order to obtain NOEs for protons with degenerate chemical shifts, which is particularly common for large proteins with significant helical content, 3D and 4D 15N/15N ...
Sze, K, Xia, Y, Zhu, G
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Syntheses of [1-15N]-2′-Deoxyinosine, [4-15N]-2′-DeoxyAICAR, and [1-15N]-2′-Deoxyguanosine
European Journal of Organic Chemistry, 1999A high-yield synthesis of [1-15N]-2′-deoxyinosine (5), [4-15N]-2′-deoxyAICAR (7), and [1-15N]-2′-deoxyguanosine (10) from 2′-deoxyinosine (1) using relatively low expensive 15NH3 as 15N source is described. The method exploits 2-C reactivity of 2′-deoxyinosine (1) to obtain its 15N-labelled counterpart, through [1-15N]-2′-deoxyinosine (5), and ...
CATALANOTTI, BRUNO +6 more
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Journal of Biomolecular NMR, 1994
The simultaneous acquisition of a 4D gradient-enhanced and sensitivity-enhanced [13C,15N]/[15N,15N]-separated NOESY is presented for the 74-residue [13C,15N]-labeled N-terminal SH3 domain of mGrb2 complexed with a peptide fragment from mSOS-2 in 90% H2O.
B T, Farmer, L, Mueller
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The simultaneous acquisition of a 4D gradient-enhanced and sensitivity-enhanced [13C,15N]/[15N,15N]-separated NOESY is presented for the 74-residue [13C,15N]-labeled N-terminal SH3 domain of mGrb2 complexed with a peptide fragment from mSOS-2 in 90% H2O.
B T, Farmer, L, Mueller
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A Comparison of 15N‐Depleted and 15N‐Enriched Fertilizers as Tracers
Soil Science Society of America Journal, 1974Abstract ( 14 NH 4 ) 2 SO 4 from which virtually all 15 N had been removed was compared as a tracer with (NH
J. L. Starr +2 more
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A two-step synthesis of benzylamine-15N from ammonia-15N
Journal of Labelled Compounds and Radiopharmaceuticals, 1978The reaction of ammonia-15N with benzaldehyde in 50% aq. methanol followed by slow removal of solvent led to a high yield of a crystalline product (benzylimine-15N). On reduction with sodium cyanoborohydride a good yield of benzylamine-15N was obtained. The synthetic usefulness of this compound is discussed.
C. Gazzola, G. L. Kenyon
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1993
The first tests conducted at the IAEA Agricultural Laboratory in Seibersdorf, Austria toward developing a method for labelling Azolla with 15N used single additions of 50-100 ppm N in nutrient solutions. With this method, it was found that ammonium sulfate resulted in a rapid drop in pH and very poor Azolla growth.
K. S. Kumarasinghe, D. L. Eskew
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The first tests conducted at the IAEA Agricultural Laboratory in Seibersdorf, Austria toward developing a method for labelling Azolla with 15N used single additions of 50-100 ppm N in nutrient solutions. With this method, it was found that ammonium sulfate resulted in a rapid drop in pH and very poor Azolla growth.
K. S. Kumarasinghe, D. L. Eskew
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A study of 15N by use of the reaction 13C(3He, p)15N
Nuclear Physics A, 1977Abstract Angular distributions of protons from the 13 C( 3 He, p) 15 N reaction and elastic 3 He scattering on 13 C have been measured from θ lab = 7.5° to 107.5° with a bombarding energy of 20 MeV. A total of 17 levels in 15 N up to an excitation energy of 10 MeV have been analyzed within the framework of DWBA with two-nucleon form factors ...
T. Pedersen +5 more
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Synthesis of DL-α-15N-tryptophan and 2-15N-perlolyrine
Journal of Labelled Compounds and Radiopharmaceuticals, 1998DL-α- 15 N-Tryptophan was synthesized by simple and convenient chemical reduction method,starting from α- 15 N-glycine and benzoyl chloride via five steps. The yield of DL-α- 15 N-tryptophan from α- 15 N-glycine was 46.9%. 2- 15 N-Perlolyrine was synthesized from DL- α- 15 N-tryptophan and 5-acetoxymethyl-2-formylfuran via three steps.
Ganghua Tang +3 more
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The Journal of Nutrition, 1978
To investigate the nutritional role of intestinal flora on the utilization of non-protein nitrogen (NPN) for protein synthesis, 15N-urea and 15N-diammonium citrate (DAC) were administered orally to germfree and specific pathogen free (SPF) piglets fed a 21.9% crude protein diet.
E, Deguchi +3 more
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To investigate the nutritional role of intestinal flora on the utilization of non-protein nitrogen (NPN) for protein synthesis, 15N-urea and 15N-diammonium citrate (DAC) were administered orally to germfree and specific pathogen free (SPF) piglets fed a 21.9% crude protein diet.
E, Deguchi +3 more
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