Dickens J E, Irvine W M, Ohishi M, Arrhenius G, Pitsch S, Bauder A, Muller F, Eschenmoser A
Five College Radio Astronomy Observatory, University of Massachusetts, Amherst 01003, USA.
Orig Life Evol Biosph. 1996 Apr;26(2):97-110. doi: 10.1007/BF01809850.
We report a search in cold, quiescent and in 'hot core' type interstellar molecular clouds for the small cyclic molecule oxiranecarbonitrile (C3H3NO), which has been suggested as a precursor of important prebiotic molecules. We have determined upper limits to the column density and fractional abundance for the observed sources and find that, typically, the fractional abundance by number relative to molecular hydrogen of C3H3NO is less than a few times 10(-10). This limit is one to two orders of magnitude less than the measured abundance of such similarly complex species as CH3CH2CN and HCOOCH3 in well-studied hot cores. A number of astrochemical discoveries were made, including the first detection of the species CH3CH2CN in the massive star-forming clouds G34.3+0.2 and W51M and the first astronomical detections of some eight rotational transitions of CH3CH2CN, CH3CCH, and HCOOCH3. In addition, we found 8 emission lines in the 89 GHz region and 18 in the 102 GHz region which we were unable to assign.
我们报告了在寒冷、宁静以及“热核”型星际分子云中对小环状分子环氧乙腈（C₃H₃NO）的搜寻，该分子被认为是重要益生元分子的前体。我们已确定了观测源的柱密度和丰度分数上限，发现相对于分子氢而言，C₃H₃NO的数量丰度分数通常小于几倍的10⁻¹⁰。这一上限比在充分研究的热核中测量到的类似复杂物种如CH₃CH₂CN和HCOOCH₃的丰度低一到两个数量级。我们取得了多项天体化学发现，包括在大质量恒星形成云G34.3 + （）和W51M中首次检测到CH₃CH₂CN物种，以及首次对CH₃CH₂CN、CH₃CCH和HCOOCH₃的约八条转动跃迁进行天文检测。此外，我们在89吉赫兹区域发现了8条发射线，在102吉赫兹区域发现了18条发射线，但无法对其进行归属。 （注：原文中G34.3+0.2括号内容缺失，翻译时保留原文格式）
