Results 241 to 250 of about 65,505 (298)

The Concentration of C13

The Journal of Chemical Physics, 1940
The chemical exchange method has been applied to the separation of the isotopes of carbon. Various exchange reactions have been tested, using counter-current flow in packed fractionation columns, and of these, the exchange between hydrogen cyanide gas and a solution of sodium cyanide in water has been found to be most efficient.
Clyde A. Hutchison, David W. Stewart, Harold C. Urey   +2 more
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Binding of terbium and cisplatin to C13* human ovarian cancer cells using time-resolved terbium luminescence [PDF]

Biochimica Et Biophysica Acta - Molecular Cell Research, 1998
Terbium (Tb3+) has been shown to increase the cellular accumulation and cytotoxicity of cisplatin in cisplatin-resistant human breast and ovarian cancer cells.
Robert G Canada, R G Canada
exaly   +2 more sources

C13 cross-relaxation measurements

, 1995
Bültmann S, Baum G, Dulya CM, et al. C13 cross-relaxation measurements. In: Heller KJ, Smith SL, eds. High-Energy Spin Physics: proceedings (AIP Conference Proceedings). Vol 343.
Bültmann, Stephen, Baum, Günter, Dulya, C. M., Hayashi, N., Kishi, A., Kisselev, Yu, Krämer, D., Kyynäräinen, J., Le Goff, J. M., Magnon, A., Niinikoski, T., Semertzidis, Y. K., Heller, Kenneth J., Smith, Sandra L.   +13 more
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Synthesis of the C1−C13 Fragment of Leucascandrolide A

Organic Letters, 2000
[reaction: see text] The synthesis of the C1-C13 fragment 3 of leucascandrolide A has been completed utilizing a stereoselective and regioselective reductive cleavage of a highly functionalized spiroketal to incorporate the cis-2,6-disubstituted tetrahydropyan. The spiroketal was constructed by addition of a lithiated pyrone 5 to aldehyde 6.
M T, Crimmins, C A, Carroll, B W, King
openaire   +2 more sources

Synthesis of the C1-C13 Fragment of (+)-Callipeltoside A

Synlett, 2007
The synthesis of the C1-C13 fragment of (+)-callipeltoside A has been achieved in 12 steps with an overall yield of 11%.
Boulard, L., Bouzbouz, S., Paris, J.-M., Cossy, J.   +3 more
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Synthesis of the C13-C23 Segment of Tedanolide

Synlett, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Gunnar Ehrlich, Markus Kalesse
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Synthesis of a Model for C7−C13 of Lankamycin

Organic Letters, 1999
[structure: see text] A convenient method is reported for construction of the C7-C13 segment of the macrolide antiobiotic lankamycin.
B C, Raimundo, C H, Heathcock
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The dipole state in C13

Physics Letters, 1962
The change in the dipole state of C/sup 12/ produced by the addition of a single neutron is calculated. The C/sup 12/ nucleus is considered as a closed- shell nucleus in the j-j coupling model, and C/sup 13/ is considered as the addition of a 1p/sub 1/2 valence neutron to this C/sup 12/ nucleus.
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The fission of uranium by C13 ions

Journal of Inorganic and Nuclear Chemistry, 1956
Abstract The relative yields of seventeen nuclides from the fission of natural uranium by C 13 ions of maximum energy 100 MeV have been measured by radiochemical methods. The typical features of high-energy fission were observed: symmetric fission predominates; nuclides near to β stability have significant independent yields; approximately eleven ...
F. Brown, M.R. Price, H.H. Willis
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C13

Emanuele Severino e la struttura originaria Verità originaria, regimi dell’apparire e criterio di ...
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