Results 241 to 250 of about 78,379 (305)

Different isotope compositions of C32 DPEP and C32 etioporphyrin III in oil shale

The Science of Nature, 1989
Le schiste bitumineux Julia Creek (Cretace, Australie) est utilise pour etudier la relation entre les cycloalkanoporphyrines et les polyalkylporphyrines a partir d'une comparaison des compositions ...
R, Ocampo, H J, Callot, P, Albrecht, B N, Popp, M R, Horowitz, J M, Hayes   +5 more
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Theoretical study of metallofullerenes M@C32

Journal of Molecular Structure: THEOCHEM, 1998
Abstract 14 systems of metal atoms, embedded inside the C 32 cage, have been calculated and analyzed using the ab initio quantum chemistry Gamess program. We study their electronic structure, compare their stability. The metal atom with even electrons interjected inside the C 32 cage is more stable than the metal atom with odd electrons.
Lin, MH, Chiu, YN, Lai, ST, Xiao, JM, Fu, MZ   +4 more
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Using Synthetic Controls: Feasibility, Data Requirements, and Methodological Aspects

Journal of Economic Literature, 2021
Probably because of their interpretability and transparent nature, synthetic controls have become widely applied in empirical research in economics and the social sciences.
Alberto Abadie
semanticscholar   +1 more source

Further C32 triterpenoids from Neolitsea pulchella

Journal of the Chemical Society, Perkin Transactions 1, 1973
Three further C32 triterpenoids isolated from the stems of Neolitsea pulchella, have been shown to be 3β,24ξ-dimethoxy-24,25-dimethyl-lanost-9(11)-ene (I). 24ξ-methoxy-24,25-dimethyl-lanost-9(11)-en-3-one (II), and 24,24-dimethyl-lanosta-9(11),25-dien-3β-ol (III). Compounds (I) and (II) are new.
Wai-Shing Chan, Wai-Haan Hui
openaire   +1 more source

Theoretical study on C32 fullerenes and derivatives

Chemical Physics Letters, 2006
Abstract A series of B3LYP/6-31G∗ calculations reveal that the D3 isomer is the most stable isomer of C32 carbon cages. The derivatives of it, including additional productions (C32H2, C32Cl2), hetero-fullerenes (C30B2, C30N2), isoelectronic molecules ( C 30 B 2 2 - , C 30 N 2 2 + ) and dimers have ...
Yingfei Chang, Abraham F. Jalbout, Jingping Zhang, Zhongmin Su, Rongshun Wang   +4 more
openaire   +1 more source

C32-amino derivatives of the immunosuppressant ascomycin

Bioorganic & Medicinal Chemistry Letters, 1997
Abstract Various C32-amino derivatives were investigated as replacements for the C32-hydroxyl group of ascomycin and its C24-deoxy analog. The syntheses of these amino derivatives and their biological evaluation are reported herein.
Hyun O. Ok, John L. Szumiloski, Thomas R. Beattie, Mark T. Goulet, Mary Jo Staruch, Francis J. Dumont, Matthew J. Wyvratt   +6 more
openaire   +1 more source

Adjuvant properties of a simplified C32 monomycolyl glycerol analogue

Bioorganic & Medicinal Chemistry Letters, 2009
A simplified C(32) monomycolyl glycerol (MMG) analogue demonstrated enhanced immunostimulatory activity in a dioctadecyl ammonium bromide (DDA)/Ag85B-ESAT-6 formulation. Elevated levels of IFN-gamma and IL-6 were produced in spleen cells from mice immunised with a C(32) MMG analogue comparable activity to the potent Th1 adjuvant, trehalose 6,6'-di ...
Veemal, Bhowruth, David E, Minnikin, Else Marie, Agger, Peter, Andersen, Vincent W, Bramwell, Yvonne, Perrie, Gurdyal S, Besra   +6 more
openaire   +2 more sources

Synthesis of the C23–C32 fragment of spirangien

Tetrahedron Letters, 2007
Abstract The synthesis of the C23–C32 fragment of spirangien A is reported using Evans’ alkylation, Evans–Metternich aldol reaction and a substrate controlled stereoselective reduction.
Michael Lorenz, Markus Kalesse
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Structures of three C32 triterpenoids from Neolitsea pulchella

Journal of the Chemical Society C: Organic, 1971
Three triterpenoids isolated from Neolitsea pulchella, have been proved by n.m.r. and mass spectral data, and chemical correlations with one another and with cycloneolitsin (3β-methoxy-24,24-dimethyl-9,19-cyclolanost-25-ene) to be 3β-methoxy-24,24-dimethyl-lanosta-9(11),25-diene (I), 24,24-dimethyl-lanosta-9(11),25-dien-3-one (II), and 24ξ-hydroxy-3β ...
W. H. Hui, K. Luk, H. R. Arthur, S. N. Loo   +3 more
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Mallotin—a new C32 triterpenoid from Mallotous stenanthus

Phytochemistry, 1975
Abstract Mallotin, a new C 32 triterpene from Mallotous stenanthus , has been isolated and its structure established as 24,24-dimethyl-lanosta-7,25-dien-3α-ol.
Raghwendra Pal, D.K. Kulshreshtha, R.P. Rastogi   +2 more
openaire   +1 more source