Results 131 to 140 of about 205,885 (332)

Formation of fullerenes in H-containing Planetary Nebulae

, 2010
Hydrogen depleted environments are considered an essential requirement for the formation of fullerenes. The recent detection of C60 and C70 fullerenes in what was interpreted as the hydrogen-poor inner region of a post-final helium shell flash Planetary ...
Cherchneff, Cherchneff, Duley, Duley, García-Hernández, García-Lario, Goeres, Grishko, Hrivnak, Jäger, Kwok, Kwok, Köppen, Maciel, Mendez, Perinotto, Scott, Scott, Scott, Shaw, Shaw, Speck, Stanghellini, Stanghellini, Williams   +24 more
core   +1 more source

The 3‐Hit Metabolic Signaling Model for Autism Spectrum Disorder: A Summary

Autism Research, EarlyView.
ABSTRACT Autism spectrum disorder (ASD) is a highly heritable yet environmentally sensitive neurodevelopmental condition whose biological heterogeneity has resisted a unifying causal explanation for over 100 years. The 3‐hit metabolic signaling model proposes that ASD arises from abnormal persistence of an evolutionarily conserved stress‐response ...
Robert K. Naviaux
wiley   +1 more source

Metal‐Free Covalent Organic Frameworks for Photocatalytic CO2 Reduction

ChemistryEurope, EarlyView.
This review presents an environmentally sustainable strategy to address the critical issue of escalating atmospheric CO2 levels. It explores the application of metal‐free covalent organic frameworks in a photocatalytic approach, offering a green and efficient strategy for carbon dioxide reduction and contributing to climate change mitigation.
Supriti Dutta, Akhtar Alam, Pekham Chakrabortty, Pradip Pachfule   +3 more
wiley   +1 more source

ISM properties in low-metallicity environments I. mid-infrared spectra of dwarf galaxies

, 2005
We present new ISOCAM mid-infrared spectra of three starbursting nearby dwarf galaxies, NGC1569, IIZw40, NGC1140 and the 30Dor region of the LMC and explore the properties of the ISM in low-metallicity environments, also using additional sources from the
A. P. Jones, Aitken, Allain, Allain, Allamandola, Allamandola, Alonso-Herrero, Athey, Brinks, Calzetti, Cesarsky, Cesarsky, Clayton, Contursi, Coulais, Crowther, Dale, Dale, Dale, Dudley, Dudley, Dufour, Désert, Engelbracht, F. Galliano, Freedman, Frogel, Förster Schreiber, Galliano, Galliano, Genzel, Gil de Paz, Giveon, Grevesse, Guhathakurta, Guseva, Heckman, Helou, Houck, Hunt, Hunt, Hunter, Hunter, Israel, Joblin, Jochims, Kelly, Kessler, Kobulnicky, Kobulnicky, Laurent, Leach, LePage, Lisenfeld, Lutz, Lutz, Léger, M. Sauvage, Madden, Martín-Hernández, Martín-Hernández, Mathis, Mattila, Melisse, Peeters, Plante, Reach, Rieke, Rieke, Rigby, Rigopoulou, Rigopoulou, Roche, Roche, Roussel, Roussel, S. C. Madden, Sauvage, Sellgren, Siebenmorgen, Starck, Sturm, Sturm, Tacconi-Garman, Takeuchi, Thornley, Thuan, Thuan, Uchida, Vacca, van den Bergh, Vanzi, Vermeij, Verstraete, Verstraete, Vigroux, Vogler, Voit, Waller   +98 more
core   +1 more source

Risk stratification in PAH

Global Cardiology Science and Practice, 2020
[No abstract. Showing first paragraph of article]Pulmonary arterial hypertension (PAH) is a chronic disease of the pulmonary vasculature characterized by progressive narrowing of the pulmonary arteries leading to increased pulmonary vascular resistance, right heart failure, and ultimately premature death.There has been a significant improvement in the ...
openaire   +3 more sources

Synthesis of a π‐Extended Phenazine Diimide Derivative and Characterization of Its Closed‐Shell Reduced States

Chemistry – A European Journal, EarlyView.
In this work, the synthesis and characterization of novel π‐extended phenazine diimides is reported. The derivatives undergo differential reduction to a dihydrophenazine or Meisenheimer form depending on the reaction conditions employed. The outcome of this work highlights the paramount importance of structural design in determining the nature of the ...
Francesco Rigodanza, Beatrice Bartolomei, Ilaria Crea, Paolo Costa, Nicola Demitri, Marcella Bonchio, Maurizio Prato, Jacopo Dosso   +7 more
wiley   +1 more source

Tuning the Twist by Molecular Design: A New Strategy for Hexabenzocoronene‐Containing Helical Twistacene

Chemistry – A European Journal, EarlyView.
An efficient Scholl–based strategy enables precise control of the C–C bond to access the first hexabenzocoronene–containing helical twistacene (NG2). The resulting nanographene shows pronounced helical distortion, high stability, enhanced solubility, and promising redox and optoelectronic properties.
Juan P. Mora‐Fuentes, Daniel Villar‐Castro, J. Francisco Barbosa‐de‐Bessa, Daniel Aranda, Frank Hampel, Dolores Pérez, M. Eugenia Pérez‐Ojeda, Diego Peña, Andreas Hirsch   +8 more
wiley   +1 more source

The abundances of hydrocarbon functional groups in the interstellar medium inferred from laboratory spectra of hydrogenated and methylated polycyclic aromatic hydrocarbons

, 2013
Infrared (IR) absorption spectra of individual polycyclic aromatic hydrocarbons (PAHs) containing methyl (-CH3), methylene (>CH2), or diamond-like *CH groups and IR spectra of mixtures of methylated and hydrogenated PAHs prepared by gas phase ...
Friedrich, Manfred, Henning, Thomas, Huisken, Friedrich, Jäger, Cornelia, Müllen, Klaus, Plass, Winfried, Räder, Hans-Joachim, Steglich, Mathias   +7 more
core   +1 more source

Interplay of Orbital Overlap and Exciton Coupling in the Optical Properties of Adamantylethynyl‐Substituted Pyrene Molecular Crystals

Chemistry – A European Journal, EarlyView.
Sterically shielded adamantylethynyl‐substituted pyrenes form quasi‐one‐dimensional π‐stacks that enable direct quantification of solution‐to‐crystal spectral shifts. The optical response is dominated by band dispersion arising from frontier crystal orbitals, while excitonic contributions are secondary.
Benedikt Herbert, Kazutaka Shoyama
wiley   +1 more source

PAH Formation in O-rich Planetary Nebulae

, 2014
Polycyclic aromatic hydrocarbons (PAHs) have been observed in O-rich planetary nebulae towards the Galactic Bulge. This combination of oxygen-rich and carbon-rich material, known as dual-dust or mixed chemistry, is not expected to be seen around such ...
Gesicki, K., Guzman-Ramirez, L., Jones, D., Lagadec, E., Zijlstra, A. A.   +4 more
core   +1 more source