Results 31 to 40 of about 36,044 (198)

Herschel spectral-mapping of the Helix Nebula (NGC 7293): Extended CO photodissociation and OH+ emission [PDF]

, 2014
The Helix Nebula (NGC 7293) is the closest planetary nebulae. Therefore, it is an ideal template for photochemical studies at small spatial scales in planetary nebulae. We aim to study the spatial distribution of the atomic and the molecular gas, and the
Barlow, M. J., Cernicharo, J., Etxaluze, M., Goicoechea, J. R., Groenewegen, M. A. T., Kerschbaum, F., Lim, T. L., Lique, F., Matsuura, M., Pearson, C., Polehampton, E. T., Royer, P., Swinyard, B. M., Ueta, T., van de Steene, G. C., van Hoof, P. A. M.   +15 more
core   +3 more sources

Photodissociation Regions [PDF]

, 2011
Mark G. Wolfire, Michael J. Kaufman
  +7 more sources

Atmospheric processes on ice nanoparticles in molecular beams

Frontiers in Chemistry, 2014
This review summarizes some recent experiments with ice nanoparticles (large water clusters) in molecular beams and outlines their atmospheric relevance: (1) Investigation of mixed water–nitric acid particles by means of the electron ionization and ...
Michal eFárník, Viktoriya ePoterya
doaj   +1 more source

The photodissociation of CO in circumstellar envelopes

, 2017
Carbon monoxide is the most abundant molecule after H$_2$ and is important for chemistry in circumstellar envelopes around late-type stars. The size of the envelope is important when modelling low-J transition lines and deriving mass-loss rates from such
Groenewegen, M. A. T.
core   +1 more source

C₆₀IN PHOTODISSOCIATION REGIONS [PDF]

The Astrophysical Journal, 2014
Recent studies have confirmed the presence of buckminsterfullerene (C$_{60}$) in different interstellar and circumstellar environments. However, several aspects regarding C$_{60}$ in space are not well understood yet, such as the formation and excitation processes, and the connection between C$_{60}$ and other carbonaceous compounds in the interstellar
Castellanos, Pablo; Berné, Olivier; Sheffer, Yaron; Wolfire, Mark G.; Tielens, Alexander G. G. M.   +5 more
openaire   +2 more sources

Preparing sulfur nanoparticles and determining their effect on the photodegradation of polycarbonates [PDF]

مجلة جامعة الانبار للعلوم الصرفة
This study involved the preparation of sulfur nanoparticles using the extract of Ziziphus-spina leaves and examined their effect on the photodegradation of polycarbonate membranes with a thickness of (60±5) microns, after adding various ...
rand hassan, Hameed Ali, Muthanaa Sirhan
doaj   +1 more source

Molecular ion trap-depletion spectroscopy of BaCl$^+$

, 2011
We demonstrate a simple technique for molecular ion spectroscopy. BaCl$^+$ molecular ions are trapped in a linear Paul trap in the presence of a room-temperature He buffer gas and photodissociated by driving an electronic transition from the ground X$^1 ...
Chen, Kuang, Hudson, Eric R., Kotochigova, Svetlana, Petrov, Alexander, Rellergert, Wade G., Schowalter, Steven J., Sullivan, Scott T.   +6 more
core   +1 more source

The effects of nitric oxide cooling and the photodissociation of molecular oxygen on the thermosphere/ionosphere system over the Argentine Islands [PDF]

Annales Geophysicae, 1997
In the past the global, fully coupled, time-dependent mathematical model of the Earth's thermosphere/ionosphere/plasmasphere (CTIP) has been unable to reproduce accurately observed values of the maximum plasma frequency, foF2, at extreme geophysical ...
G. D. Wells, A. S. Rodger, R. J. Moffett, G. J. Bailey, T. J. Fuller-Rowell   +4 more
doaj   +1 more source

Integrating Spatial Proteogenomics in Cancer Research

Advanced Science, EarlyView.
Xx xx. ABSTRACT Background: Spatial proteogenomics marks a paradigm shift in oncology by integrating molecular analysis with spatial information from both spatial proteomics and other data modalities (e.g., spatial transcriptomics), thereby unveiling tumor heterogeneity and dynamic changes in the microenvironment.
Yida Wang, Yang Wu, Feng Zhang, Parthiban Periasamy, Haiyue You, Denise Goh, Rachel Elizabeth Ann Fincham, Xin Ning, Danping Wu, Lu Liu, Ying Jiang, Zhiwen Qian, Joe Yeong, Yan Zhang   +13 more
wiley   +1 more source

Photodissociation Dynamics of DNA Bases [PDF]

Journal of Biological Physics, 2003
In order to access the damaging mechanismsof DNA and its bases on themolecular level by T Hz radiation, it isnecessary to create a database of assessingdamage at different spectral regions.Possible damage by T Hz radiation will beassessed by comparison.
Sarantopoulou, Evangelia, Kollia, Zoe, Cefalas, Alciviadis Constantinos, Kobe, S., Samardzija, Z.   +4 more
openaire   +2 more sources