Results 91 to 100 of about 36,044 (198)

Interferometric imaging of the sulfur-bearing molecules H2S, SO and CS in comet C/1995 O1 (Hale-Bopp)

, 2007
We present observations of rotational lines of H2S, SO and CS performed in comet C/1995 O1 (Hale-Bopp) in March 1997 with the Plateau de Bure interferometer (IRAM).
Altenhoff, B. G. Marsden, Biver, Biver, Biver, Biver, Blake, Bockelée-Morvan, Combi, Crovisier, D. Bockelée-Morvan, D. Despois, DiSanti, Feldman, Guilloteau, Henry, Huebner, J. Boissier, J. Crovisier, Jackson, Jackson, Jorda, Kim, Kumar, Lederer, Magee-Sauer, N. Biver, Phillips, R. Moreno, Snyder, Summers, Weaver, Weaver, Wink, Woodney, Wright   +35 more
core   +4 more sources

Modelling Primordial Gas in Numerical Cosmology [PDF]

, 1996
We have reviewed the chemistry and cooling behaviour of low-density (n H2 + H+, and H- + H -> H2 + e-, is likely to be converted into its para configuration on a faster time scale than the formation time scale.
Abel, Aldrovandi, Allison, Allison, Anninos, Anninos, Bell, Bieniek, Black, Browne, Cen, Corrigan, Couchman, Couchman, Dalgarno, Dalgarno, De Jong, Dolder, Donahue, Dove, Dove, Dove, Dunn, Ferland, Flower, Haiman, Hollenbach, Hummer, Hutchins, Janev, Janev, Karpas, Kashlinsky, Latter, Launay, Lennon, Lenzuni, Lepp, Lepp, Mac Low, Mandy, Martin, Martin, Michael L. Norman, Mihalas, Mitchell, Moessner, Moseley, Nakashima, O'Neil, Osterbrock, Osterbrock, Padoan, Palla, Peart, Peebles, Peebles, Peter Anninos, Poulaert, Prasad, Puy, Ramaker, Rawlings, Rees, Sargent, Saslaw, Sauval, Schneider, Senekowitsch, Shapiro, Shull, Shull, Sobelman, Stahler, Stancil, Stancil, Stecher, Sun, Szucs, Szucs, Tegmark, Tom Abel, Vietri, Wadehra, Wishart, Yu Zhang   +85 more
core   +2 more sources

CALCULATION OF CHEMICAL EQUILIBRIUM IN THE INTERSTELLAR CLOUD

Odessa Astronomical Publications, 2017
In order to calculate the molecular concentrations in the interstellar cloud and to obtain heir spatial distribution we have made a computational code to solve the set of equations for chemical equilibrium and equations of charge and atom balance.
I. Shmeld, J. Freimanis, N. G. Bochkarev
doaj   +1 more source

Near-UV photolysis cross sections of CH₃OOH and HOCH₂OOH determined via action spectroscopy [PDF]

Atmospheric Chemistry and Physics, 2007
Knowledge of molecular photolysis cross sections is important for determining atmospheric lifetimes and fates of many species. A method and laser apparatus for measurement of these cross sections in the near-ultraviolet (UV) region is described.
C. M. Roehl, Z. Marka, Z. Marka, J. L. Fry, J. L. Fry, P. O. Wennberg, P. O. Wennberg   +6 more
doaj  

Photoprocesses in protoplanetary disks

, 2006
Circumstellar disks are exposed to intense ultraviolet radiation from the young star. In the inner disks, the UV radiation can be enhanced by more than seven orders of magnitude compared with the average interstellar field, resulting in a physical and ...
Aikawa, Augereau, Bastiaan Jonkheid, Bergin, Brittain, Buenker, Calvet, Chiang, Clampin, Connors, D?Alessio, Dent, Draine, Dunning, Dutrey, Ewine F. van Dishoeck, Feigelson, Geers et al., Gorti, Greaves, Gredel, Guest, Habing, Hauschildt, Herbig, Hollenbach, Honjou, Huebner, Jonkheid, Jonkheid, Kamp, Kamp, Kamp, Kessler-Silacci, Kirby, Kirby, Koch, Koch, Lavendy, Lee, Lee, Lee, Lee, Lee, Lepp, Li, Lyons, Marc C. van Hemert, Markwick, Min, Muzerolle, Nee, Nee, Ogawa, Okabe, Pouilly, R?melt, Roberge, Roberge, Shen, Shih, Spaans, St?uber, St?uber, Suto, Suto, Suto, Suto, Sylvester, Theodorakopoulos, Thi, van Boekel, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Zadelhoff, Watanabe, Weidenschilling, Willacy, Yoshino   +81 more
core   +1 more source

Modulating Photodissociation and Photobleaching via Plasmon Resonance to Enhance Light-Induced Nitric Oxide Release

Applied Nano
Localized therapeutic action and targeted drug release offer compelling advantages over traditional systemic drug administration. This is particularly important for nitric oxide (NO), whose biological effects vary greatly depending on concentration and ...
Danil V. Shershnev, Natalia A. Virts, Igor A. Gladskikh, Pavel V. Geydt, Mikhail A. Panfilov, Alexey Yu. Vorob’ev, Alexander E. Moskalensky   +6 more
doaj   +1 more source

Near-IR photodissociation of peroxy acetyl nitrate [PDF]

Atmospheric Chemistry and Physics, 2005
Measurements of the C-H overtone transition strengths combined with estimates of the photodissociation cross sections for these transitions suggest that near-IR photodissociation of peroxy acetyl nitrate (PAN) is less significant (Jnear-IR≈3x10-8s ...
S. A. Nizkorodov, J. D. Crounse, J. L. Fry, C. M. Roehl, P. O. Wennberg   +4 more
doaj  

Dissociation Dynamics of CIONO_2 and Relative Cl and ClO Product Yields following Photoexcitation at 308 nm [PDF]

, 1995
Chlorine nitrate photolysis at 308 nm has been investigated with a molecular beam technique. Two primary decomposition pathways, leading to Cl + NO_3 and ClO + NO_2, were observed.
Minton, Timothy K., Moore, Teresa A., Okumura, Mitchio, Tagawa, Masahito   +3 more
core   +1 more source

Chemistry of a protoplanetary disk with grain settling and Lyman alpha radiation

, 2010
We present results from a model of the chemical evolution of protoplanetary disks. In our models we directly calculate the changing propagation and penetration of a high energy radiation field with Lyman alpha radiation included.
Bergin, Edwin A., Bethell, Thomas J., Calvet, Nuria, Fogel, Jeffrey K. J., Semenov, Dmitry   +4 more
core   +1 more source

Detection of Formaldehyde Towards the Extreme Carbon Star IRC+10216

, 2004
We report the detection of H2CO (formaldehyde) around the carbon-rich AGB star, IRC+10216. We find a fractional abundance with respect to molecular hydrogen of x(H2CO)= (1.3 {+1.5}{-0.8}) x 10^{-8}.
Beust H., Cernicharo J., Colom P., Dartois E., David A. Neufeld, Gary J. Melnick, Jaruschewski S., K. E. Saavik Ford, Meier R., Peter Schilke, Pierazzo E., Tsuji T., Willacy K.   +12 more
core   +1 more source