Results 61 to 70 of about 589,238 (298)

Structural flexibility of halogen bonds showed in a single-crystal-to-single-crystal [2+2] photodimerization

open access: yesIUCrJ, 2018
Halogen bonds have emerged as noncovalent forces that govern the assembly of molecules in organic solids with a degree of reliability akin to hydrogen bonds.
Michael A. Sinnwell   +3 more
doaj   +1 more source

Towards Hybrid Density Functional Calculations of Molecular Crystals via Fragment-Based Methods

open access: yes, 2018
We introduce and employ two QM:QM schemes (a quantum mechanical method embedded into another quantum mechanical method) and report their performance for the X23 set of molecular crystals.
Boese, A. Daniel   +2 more
core   +1 more source

Electronic structure and correlations in pristine and potassium doped Cu-Phthalocyanine molecular crystals [PDF]

open access: yes, 2006
We investigate the changes in the electronic structure of copper phthalocyanine (CuPc) crystals that is caused by intercalation with potassium. This is done by means of {\it ab initio} LSDA and LSDA+U calculations of the electronic structure of these ...
Brink, Jeroen van den   +2 more
core   +5 more sources

Nicotinamide N‐methyltransferase promotes drug resistance in lung cancer, as revealed by nascent proteomic profiling

open access: yesMolecular Oncology, EarlyView.
AZD9291 has shown promise in targeted cancer therapy but is limited by resistance. In this study, we employed metabolic labeling and LC–MS/MS to profile time‐resolved nascent protein perturbations, allowing dynamic tracking of drug‐responsive proteins. We demonstrated that increased NNMT expression is associated with drug resistance, highlighting NNMT ...
Zhanwu Hou   +5 more
wiley   +1 more source

Models of thermal motion in small-molecule crystallography

open access: yesIUCrJ
The Debye–Waller factor, introduced a century ago, remains a fundamental component in the refinement of crystal structures against X-ray, neutron and electron diffraction data.
Anna Hoser, Anders Ø. Madsen
doaj   +1 more source

Charge Transport in Organic Molecular Semiconductors from First Principles: The Band-Like Hole Mobility in Naphthalene Crystal [PDF]

open access: yes, 2018
Predicting charge transport in organic molecular crystals is notoriously challenging. Carrier mobility calculations in organic semiconductors are dominated by quantum chemistry methods based on charge hopping, which are laborious and only moderately ...
Agapito, Luis A.   +3 more
core   +3 more sources

PARP inhibitors elicit distinct transcriptional programs in homologous recombination competent castration‐resistant prostate cancer

open access: yesMolecular Oncology, EarlyView.
PARP inhibitors are used to treat a small subset of prostate cancer patients. These studies reveal that PARP1 activity and expression are different between European American and African American prostate cancer tissue samples. Additionally, different PARP inhibitors cause unique and overlapping transcriptional changes, notably, p53 pathway upregulation.
Moriah L. Cunningham   +21 more
wiley   +1 more source

Orientation-Dependent Nanomechanical Behavior of Pentaerythritol Tetranitrate as Probed by Multiple Nanoindentation Tip Geometries

open access: yesCrystals
Nanoindentation can be leveraged to aid in the high fidelity modeling of dislocation mediated plasticity in pentaerythritol tetranitrate (PETN), an anisotropic energetic molecular crystal.
Morgan C. Chamberlain   +5 more
doaj   +1 more source

Collective electromagnetic relaxation in crystals of molecular magnets

open access: yes, 2004
We study the magnetization reversal and electromagnetic radiation due to collective Landau-Zener relaxation in a crystal of molecular magnets. Analytical and numerical solutions for the time dependence of the relaxation process are obtained. The power of
Carlos Calero   +5 more
core   +1 more source

Field-Dependent Tilt and Birefringence of Electroclinic Liquid Crystals: Theory and Experiment [PDF]

open access: yes, 2001
An unresolved issue in the theory of liquid crystals is the molecular basis of the electroclinic effect in the smectic-A phase. Recent x-ray scattering experiments suggest that, in a class of siloxane-containing liquid crystals, an electric field changes
A. de Vries   +27 more
core   +5 more sources

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