Results 211 to 220 of about 19,814 (278)

Orthorhombic C32: a novel superhard sp3 carbon allotrope

Physical Chemistry Chemical Physics, 2013
Using a recently developed 'Crystal structure AnaLYsis by Particle Swarm Optimization' (CALYPSO) algorithm on a structural search, we predicted a novel sp(3) carbon allotrope possessing an orthorhombic lattice with the space group Cmmm (oC32). The calculated elastic constants and the simulated hardness revealed that oC32 simultaneously possesses ultra ...
Xinxin Zhang, Yanchao Wang, Hanyu Liu, Yonghui Du, Miao Zhang, Quan Li   +5 more
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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 ...
Else Marie Agger, Vincent W. Bramwell, Peter Andersen, Gurdyal S. Besra, Yvonne Perrie, David E. Minnikin, Veemal Bhowruth   +6 more
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Selective synthesis of C32- and C20-monoiodinated chlorophyll derivatives

Tetrahedron Letters, 2015
Abstract A chlorophyll derivative possessing an iodine atom at the C3-moiety was synthesized from methyl pyropheophorbide- a for the first time using phenyliodine bis(trifluoroacetate) and I 2 . The use of larger amounts of reagents resulted in additional iodination at the C20-position, thus affording the 3,20-diiodo derivative.
Kota Miyata, Toru Oba, Satoshi Ito, Satoru Yasuda, Takuto Masuya   +4 more
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Temperature Dependent Stabilities of the C32 and K@C32, Ca@C32 and Sc@C32 Endohedral Metallofullerene Isomeric Set

Chemical Data Collections, 2020
Abstract Since their discovery in 1985, Fullerenes have been an intriguing subject due to their structure and varying stabilities and potential use in medical and energy research. In this article, we present the temperature dependent thermodynamic stabilities of the C32, K@C32, Ca@C32, and Sc@C32 isomeric sets as computed at temperatures ranging from
Timothy J. Fuhrer, Sarah A. Church, Jessica T. Coello   +2 more
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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.
Markus Kalesse, Michael Lorenz
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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 ...
Rongshun Wang, Zhong-Min Su, Ying-Fei Chang, Abraham F. Jalbout, Jingping Zhang   +4 more
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ChemInform Abstract: C32‐Amino Derivatives of the Immunosuppressant Ascomycin.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Mary Jo Staruch, Hyun O. Ok, Francis J. Dumont, Thomas R. Beattie, Matthew J. Wyvratt, Mark T. Goulet, John Szumiloski   +6 more
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Structures and stability of the hydrides of C32, C34 and C36

Chemical Physics Letters, 2008
Abstract A systematic study was performed on C32H32, C34H34 and C36H36 at the Hartree–Fock and density functional theory levels of theory. The calculated results demonstrate that the lowest-energy isomer is classic for C32H32 and non-classic for C34H34 and C36H36.
Li-Hua Gan, Jian-Qiang Zhao
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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 ...
Henry J. Callot, M. R. Horowitz, Rubén Ocampo, Pierre Albrecht, Brian N. Popp, John M. Hayes   +5 more
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ChemInform Abstract: Calyculins: Asymmetric Synthesis of the C26‐C32 Fragment.

ChemInform, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Ari M. P. Koskinen, Petri M. Pihko
openaire   +3 more sources