Results 71 to 80 of about 35,251 (238)

Anharmonic interstellar PAH molecules [PDF]

International Journal of Quantum Chemistry, 2016
AbstractPolycyclic aromatic hydrocarbon (PAH) molecules are responsible for a family of features, the aromatic infrared bands, which are observed in many astronomical environments. The photophysics and photochemistry of PAHs in space is strongly influenced by anharmonicity, which has seldom been considered in astrophysical modeling because of the lack ...
Candian, A., Mackie, C.J.
openaire   +3 more sources

Multi‐isotope (N, O, Ti, and Cr) study of C1 and CM‐like clasts—Probing unsampled C1 material

Meteoritics &Planetary Science, Volume 60, Issue 5, Page 1073-1094, May 2025.
Abstract A multi‐element isotope (N, O, Ti, and Cr) study was conducted on C1 and CM‐like clasts hosted in achondrites and chondrite breccias to understand the genesis of these chondritic clasts. The mineralogy, O, and N isotopes confirm that CM‐like clasts in howardites and polymict eucrites closely resemble CM chondrite‐like material.
Markus Patzek, Yogita Kadlag, Miriam Rüfenacht, Evelyn Füri, Andreas Pack, Addi Bischoff, Harry Becker, Robbin Visser, Timm John, Maria Schönbächler   +9 more
wiley   +1 more source

Molecules in Interstellar Space? [PDF]

Nature, 1937
IN a recent note in NATURE1, and more in detail elsewhere2, Dr. T. Dunham, jun., has described his discovery of more interstellar lines due to K ( 7699.03), Ca ( 4227), Ti+ ( 3242.6 and others) and a number of other lines the origin of which has not yet been traced ( 3957.7, 4300.3, 4232.6). We have to add to these Merrill's interstellar lines3 ( 5780,
openaire   +1 more source

Reaction Networks For Interstellar Chemical Modelling: Improvements and Challenges

, 2010
We survey the current situation regarding chemical modelling of the synthesis of molecules in the interstellar medium. The present state of knowledge concerning the rate coefficients and their uncertainties for the major gas-phase processes -- ion ...
Agundez, M., Cuppen, H. M., Geppert, W., Herbst, E., Linnartz, H., Loison, J. C., Oberg, K., Pernot, P., Roueff, E., Smith, I. W. M., Talbi, D., Troe, J., Wakelam, V.   +12 more
core   +3 more sources

Numerical Study of Radiative and Dissipative MHD Casson Nanofluid Over a Cone With High‐Order Chemical Reaction

Engineering Reports, Volume 7, Issue 4, April 2025.
This study investigated the dissipative effects on time‐dependent Casson nanofluid motion over a cone, considering variable heat source/absorption and higher‐order reacting species. Water ethylene glycol was employed as the Casson base fluid. The proposed model has broad applicability across various scientific, engineering, and technological domains ...
L. Joseph Sademaki, B. Prabhakar Reddy, P. M. Matao   +2 more
wiley   +1 more source

Photochemistry of interstellar molecules [PDF]

The photochemistry of two diatomic and eight polyatomic molecules is discussed quantitatively. For an interstellar molecule, the lifetime against photodecomposition depends upon the absorption cross section, the quantum yield or probability of ...
Stief, L. J.
core   +1 more source

Science of omics: a molecular space odyssey

Experimental Physiology, EarlyView.
Salomé Coppens, Christophe Hirtz, Margaux Vignon, Damian M. Bailey   +3 more
wiley   +1 more source

Ph3PC – Ein Monosubstituiertes C(0) Atom im Triplett‐Zustand

Angewandte Chemie, Volume 137, Issue 10, March 3, 2025.
Im Gegensatz zu den divalenten C(0)‐Verbindungen wie den Carbodiphosphoranen sind monovalente C(0)‐Verbindungen in der Chemie weitgehend unterrepräsentiert. Jetzt wurde die erste monovalente C(0)‐Verbindung, Ph3P→C, charakterisiert, in der Triphenylphosphan eine Bindung an ein Kohlenstoffatom in seinem elektronischen 3P‐Grundzustand eingeht.
Yury Kutin, Taichi Koike, Maria Drosou, Alexander Schnegg, Dimitrios A. Pantazis, Müge Kasanmascheff, Max M. Hansmann   +6 more
wiley   +1 more source

Ph3PC – A Monosubstituted C(0) Atom in Its Triplet State

Angewandte Chemie International Edition, Volume 64, Issue 10, March 3, 2025.
In contrast to divalent C(0) compounds, such as carbodiphosphoranes, monovalent C(0) compounds are largely underrepresented in chemistry. Now the first monovalent C(0) compound, Ph3P→C, has been characterized, in which triphenylphosphine forms a bond to a carbon atom in its electronic 3P ground state.
Yury Kutin, Taichi Koike, Maria Drosou, Alexander Schnegg, Dimitrios A. Pantazis, Müge Kasanmascheff, Max M. Hansmann   +6 more
wiley   +1 more source

Determining the Methanol Deuteration in the Disk Around V883 Orionis with Laboratory Measured Spectroscopy

The Astronomical Journal
Deuterium fractionation, as studied through mono-deuterated methanol, is frequently used as a diagnostic tool to trace the physical conditions and chemical evolution of interstellar sources. This study investigates methanol deuteration in the disk around
Shaoshan Zeng, Jae-Hong Jeong, Takahiro Oyama, Jeong-Eun Lee, Yao-Lun Yang, Nami Sakai   +5 more
doaj   +1 more source