Results 131 to 140 of about 1,811,886 (362)

Angled decompositions of arborescent link complements

open access: yes, 2006
This paper describes a way to subdivide a 3-manifold into angled blocks, namely polyhedral pieces that need not be simply connected. When the individual blocks carry dihedral angles that fit together in a consistent fashion, we prove that a manifold ...
Futer, David, Guéritaud, François
core   +4 more sources

Achieving Highly Roust Polymeric Microspheres with Efficient and Full‐Color Organic Afterglow for 3D Printing and Anti‐Counterfeiting

open access: yesAdvanced Science, EarlyView.
Highly robust polymeric microspheres with efficient ultralong organic phosphorescence, dual‐mode organic afterglow, and persistent fluorescence are developed by embedding different organic luminogens into melamine‐formaldehyde polymer matrices. Their organic afterglow quantum yields and lifetimes are up to 18.0% and 1.39 s under ambient conditions ...
Pengtao Hu   +13 more
wiley   +1 more source

Maximal rank root subsystems of hyperbolic root systems

open access: yes, 2003
A Kac-Moody algebra is called hyperbolic if it corresponds to a generalized Cartan matrix of hyperbolic type. We study root subsystems of root systems of hyperbolic algebras.
Tumarkin, P.
core   +1 more source

Effects of Dihedral Angle and Substitution on S-S Bond Lengths. A CNDO/2 Molecular Orbital Study of Simple Disulfides. [PDF]

open access: bronze, 1975
Leif J. Sæthre   +9 more
openalex   +1 more source

Excitation‐Dependent Quadruple‐Level Emission from an Isolated Molecule for Dynamic Information Encryption

open access: yesAdvanced Science, EarlyView.
By manipulating the quadruple decoupled radiative transitions of donor and acceptor units, dual‐phase excitation‐dependent afterglow emission is achieved for the first time in a single isolated molecule. The decoupled donor‐acceptor units precisely manipulate the electron transfer pathways in ACRSP, endowing it with intrinsic single‐molecule Ex‐De ...
Yibo Shi   +8 more
wiley   +1 more source

(Z)-2-(4-tert-Butylphenyl)-1-(4-chloro-1-ethyl-3-methyl-1H-pyrazol-5-yl)-2-cyanovinyl pivalate

open access: yesActa Crystallographica Section E, 2011
In the title compound, C24H30ClN3O2, the dihedral angle between the benzene and pyrazole rings is 56.86 (7)°. The C=C bond is significantly twisted, as indicated by the dihedral angle of 12.26 (1)° between the two ...
Bao Wang, Haibo Yu, Bin Li
doaj   +1 more source

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