@article{c76f173ffb144a34a942ab2146d3c410,
title = "Astronomical searches for nitrogen heterocycles",
abstract = "We have conducted extensive astronomical searches for the N-bearing ring molecules pyridine, quinoline and isoquinoline towards the circumstellar envelopes of carbon-rich stars, and for interstellar pyrimidine in hot molecular cores. Here we report the derived upper limits on the column densities of these molecules, and summarize the current status of these observations.",
keywords = "Astrobiology, Astrochemistry, ISM: chemistry, ISM: molecules, Stars: AGB and post-AGB",
author = "Charnley, \{Steven B.\} and Kuan, \{Yi Jehng\} and Huang, \{Hui Chun\} and Oliver Botta and Butner, \{Harold M.\} and Nick Cox and Didier Despois and Pascale Ehrenfreund and Zbigniew Kisiel and Lee, \{Ying Ying\} and Markwick, \{Andrew J.\} and Zan Peeters and Rodgers, \{Steven D.\}",
note = "Funding Information: The research of Y.-J. K. was supported by grant NSC 93-2112-M-003. This work was supported by NASA{\textquoteright}s Exobiology and LTSA Programs through funds allocated by NASA Ames under Cooperative Agreement No. NCC2-1412 to the SETI Institute (SBC and SDR). AJM was an NRC Resident Research Associate. OB was an ESA postdoctoral fellow. PE and ZP are supported by grant NWO-VI 016.023.003. The KP12M is currently operated by the Arizona Radio Observatory at Steward Observatory (the University of Arizona), with support from the Research Corporation.",
year = "2005",
doi = "10.1016/j.asr.2005.09.005",
language = "English",
volume = "36",
pages = "137--145",
journal = "Advances in Space Research",
issn = "0273-1177",
publisher = "Elsevier Limited",
number = "2",
}