Results 41 to 50 of about 34,908 (184)

Enantioselective Synthesis of a New Class of Stable and Functionalized Cyclopentadienes via CuH‐Catalysis

Angewandte Chemie International Edition, EarlyView.
Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa, Riccardo Bellin, Besma Boulila, Francesco Vaghi, Manuel Orlandi   +4 more
wiley   +1 more source

Tiny-scale Properties within the Interstellar Medium toward PSR J1644−4559. I. Observational Evidence of Turbulence-induced Tiny-scale Atomic Structures

The Astrophysical Journal Supplement Series
We investigated H i absorption toward a single pulsar, PSR J1644−4559, and its variability over timescales from days to years, using Murriyang, CSIRO’s Parkes Radio Telescope.
Mengting Liu, Di Li, J. R. Dawson, Joel M. Weisberg, Snežana Stanimirović, George Hobbs, Simon Johnston, Lawrence Toomey, Siyao Xu, Chao-Wei Tsai, Donghui Quan, Stacy Mader, James A. Green, Lei Zhang, Ningyu Tang, Pei Wang, Kai Zhang, Pei Zuo, Gan Luo, Yi Feng, Shi Dai, Aditi Kaushik, Mengyao Xue, Chenchen Miao   +23 more
doaj   +1 more source

Atomic Carbon in Galaxies [PDF]

, 2000
We present new measurements of the ground state fine-structure line of atomic carbon at 492 GHz in a variety of nearby external galaxies, ranging from spiral to irregular, interacting and merging types.
Aalto A., Abgrall H., Baas F., Braine J., Casoli F., Casoli F., Garcia-Burillo S., Garcia-Burillo S., Gerin M., Guelin M., Harrison A., Israel F. P., Israel F. P., Israel F. P., Le Bourlot J., Lequeux J., Maryvonne Gerin, Mathis J. S., Minchin N. R., Nicola T., Sauty S., Stark R., Tauber J. A., Thomas G. Phillips, White G. J.   +24 more
core   +3 more sources

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Dust and gas in star-forming complexes in NGC 3351, NGC 5055, and NGC 5457

Open Astronomy, 2023
We present a study of the interstellar medium parameters in star-forming complexes (SFCs) in NGC 3351, NGC 5055, and NGC 5457 galaxies. This study concludes our previous investigations of gas and dust in a number of spiral galaxies.
Smirnova Ksenia Ildarovna, Wiebe Dmitri Siegfriedovich   +1 more
doaj   +1 more source

The chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds

, 2005
We present a theoretical investigation of the chemistry of fluorine-bearing molecules in diffuse and dense interstellar gas clouds. The chemistry of interstellar fluorine is qualitatively different from that of any other element, because - unlike the ...
Neufeld, David A., Schilke, Peter, Wolfire, Mark G.   +2 more
core   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

A Neutral Hydrogen Absorption Study of Cold Gas in the Outskirts of the Magellanic Clouds Using the GASKAP-H i Survey

The Astronomical Journal
Cold neutral hydrogen (H i ) is a crucial precursor for molecular gas formation and can be studied via H i absorption. This study investigates H i absorption in low column density regions of the Small and Large Magellanic Clouds (SMC and LMC) using the ...
Hongxing Chen, Snežana Stanimirović, Nickolas M. Pingel, James Dempsey, Frances Buckland-Willis, Susan E. Clark, Helga Dénes, John M. Dickey, Steven Gibson, Katherine Jameson, Ian Kemp, Denis Leahy, Min-Young Lee, Callum Lynn, Yik Ki Ma, N. M. McClure-Griffiths, Claire E. Murray, Hiep Nguyen, Lucero Uscanga, Jacco Th. van Loon, Enrique Vázquez-Semadeni   +20 more
doaj   +1 more source

Neutral Hydrogen (H i) 21 cm as a Probe: Investigating Spatial Variations in Interstellar Turbulent Properties

The Astrophysical Journal, 2023
Interstellar turbulence shapes the H i distribution in the Milky Way (MW). How this affects large-scale statistical properties of H i column density across the MW remains largely unconstrained.
Amit Kumar Mittal, Brian L. Babler, Snežana Stanimirović, Nickolas Pingel   +3 more
doaj   +1 more source

The Interstellar Environment of our Galaxy [PDF]

, 2001
We review the current knowledge and understanding of the interstellar medium of our galaxy. We first present each of the three basic constituents - ordinary matter, cosmic rays, and magnetic fields - of the interstellar medium, laying emphasis on their ...
Abbott, D. C., Abbott, D. C., Adams, W. S., Asseo, E., Bakes, E. L. O., Bartunov, O. S., Beals, C. S., Beck, R., Belfort, P., Bell, A. R., Bernard, J.-P., Beuermann, K., Birk, G. T., Blaauw, A., Blandford, R. D., Blandford, R. D., Blitz, L., Blitz, L., Bloemen, H., Bloemen, J. B. G. M., Bloemen, J. B. G. M., Bohlin, R. C., Bohlin, R. C., Bothe, W., Boulanger, F., Boulanger, F., Boulares, A., Branch, D., Bregman, J. N., Breitschwerdt, D., Bronfman, L., Burke, B. F., Burrows, D. N., Burton, W. B., Burton, W. B., Burton, W. B., Cappellaro, E., Carruthers, G., Castor, J., Cesarsky, C. J., Chevalier, R. A., Cioffi, D. F., Clemens, D. P., Cohen, M., Conti, P. S., Cordes, J. M., Cox, D. P., Cox, D. P., Crovisier, J., Crovisier, J., Crutcher, R. M., Cui, W., Dame, T. M., Dame, T. M., Davis, L., Jr., de Jong, T., Dickey, J. M., Dickey, J. M., Dickey, J. M., Diplas, A., Domgörgen, H., Dove, J. B., Dove, J. B., Draine, B. T., Draine, B. T., Duley, W. W., Duley, W. W., Dwek, E., Dwek, E., Dwek, E., Désert, F.-X., Elmegreen, B. G., Elmegreen, B. G., Elmegreen, B. G., Evans, R., Ewen, H. I., Fabbiano, G., Falgarone, E., Falgarone, E., Federman, S. R., Fermi, E., Fermi, E., Ferrière, K. M., Ferrière, K. M., Ferrière, K. M., Ferrière, K. M., Ferrière, K. M., Ferrière, K. M., Fichtel, C. E., Field, G. B., Field, G. B., Franco, J., Freedman, W. L., Freeman, K. C., Frisch, P. C., Frisch, P. C., Fruscione, A., Garcia-Munoz, M., Gardner, F. F., Garmany, C. D., Garwood, R. W., Georgelin, Y. M., Gies, D. R., Ginzburg, V. L., Gleeson, L. J., Goldsmith, D. W., Grabelsky, D. A., Haffner, L. M., Hall, J. S., Han, J. L., Han, J. L., Han, J. L., Harding, D. S., Hartmann, J., Haslam, C. G. T., Haslam, C. G. T., Heiles, C., Heiles, C., Heiles, C., Heiles, C., Heiles, C., Heiles, C., Heiles, C., Heiles, C., Henderson, A. P., Hennebelle, P., Hess, V., Hewish, A., Heyer, M. H., Hillas, A. M., Hiltner, W. A., Hiltner, W. A., Hobbs, L. M., Hollenbach, D. J., Hollenbach, D. J., Howk, J. C., Humphreys, R. M., Hurwitz, M., Inoue, M., Ip, W.-H., Jenkins, E. B., Jenkins, E. B., Jenkins, E. B., Jenkins, E. B., Jenkins, E. B., Johnston, S., Jokipii, J. R., Jokipii, J. R., Jones, A. P., Katz, N., Kennicutt, R. C., Jr., Kerr, F. J., Kim, S.-H., Knacke, R. F., Kulkarni, S. R., Kulsrud, R., Lada, C. J., Lagache, G., Lagache, G., Lagache, G., Larson, R. B., Lin, C. C., Liszt, H. S., Lockman, F. J., Lyne, A. G., Léger, A., Mac Low, M.-M., Magnani, L., Mallik, D. C. V., Maloney, P., Manchester, R. N., Mathewson, D. S., Mathis, J. S., Mathis, J. S., McCammon, D., McClure-Griffiths, N. M, McCray, R., McCray, R., McKee, C. F., McKee, C. F., McKee, C. F., McMillan, R. J., Meyer, D. M., Meyer, J.-P., Miller, G. E., Miller, W. W., Minter, A. H., Moos, H. W., Morton, D. C., Morton, D. C., Mouschovias, T. C., Mouschovias, T. C., Mouschovias, T. C., Mouschovias, T. C., Mueller, M. W., Myers, P. C., Nakano, T., Narayan, R., Narayan, R., Norman, C., Norman, C. A., Oort, J. H., Oren, A. L., Parker, E. N., Parker, E. N., Parravano, A., Piddington, J. H., Potgieter, M. S., Rand, R. J., Rand, R. J., Rasmussen, I. L., Redfield, S., Rees, M. J., Reynolds, R. J., Reynolds, R. J., Reynolds, R. J., Reynolds, R. J., Reynolds, R. J., Reynolds, R. J., Reynolds, R. J., Ristorcelli, I., Rockstroh, J. M., Rogerson, J. B., Salpeter, E. E., Savage, B. D., Savage, B. D., Savage, B. D., Savage, B. D., Savage, B. D., Schaller, G., Schlegel, D. J., Scoville, N. Z., Seab, C. G., Sembach, K. R., Sfeir, D. M., Shapiro, P. R., Shelton, R. L., Shu, F. H., Shull, J. M., Shull, J. M., Shull, J. M., Shull, J. M., Shull, J. M., Silk, J., Simard-Normandin, M., Simpson, J. A., Simpson, J. A., Sivan, J.-P., Sivan, J.-P., Slavin, J. D., Slavin, J. D., Smith, A. M., Snow, T. P., Snowden, S. L., Snowden, S. L., Snowden, S. L., Snowden, S. L., Solomon, P. M., Spitzer, L., Jr., Spitzer, L., Jr., Spitzer, L., Jr., Spitzer, L., Jr., Steenbeck, M., Strong, A. W., Strong, A. W., Struve, O., Tammann, G. A., Taylor, J. H., Tenorio-Tagle, G., Thomson, R. C., Tomisaka, K., Tomisaka, K., Troland, T. H., Trumpler, R. J., Vacca, W. D., Vainshtein, S. I., Valinia, A., Vallée, J.-P., Van Buren, D., van den Bergh, S., van den Bergh, S., Van Steenberg, M. E., Verschuur, G. L., Verschuur, G. L., Vivekanand, M., Wakker, B. P., Wang, Q. D., Wannier, P. G., Watson, W. D., Weaver, R., Webber, W. R., Webber, W. R., Webber, W. R., Weisberg, J. M., Wentzel, D. G., Wentzel, D. G., Williamson, F. O., Wilson, R. W., Witt, A. N., Wolfire, M. G., Woltjer, L., Woolf, N. J., Woosley, S. E., Wright, E. L., York, D. G., York, D. G., Zweibel, E. G.   +306 more
core   +2 more sources