Results 101 to 110 of about 3,913 (202)

Ab initio Calculations for Astrochemistry [PDF]

Computational chemistry plays a relevant role in many astrochemical research fields, either by complementing experimental measurements or by deriving parameters difficult to be reproduced by laboratories.
Alessandrini, Silvia, Tonolo, Francesca
core   +1 more source

Metal-ion mediated photolytic regulation of diphenylalanine stability: Implications for prebiotic chemical evolution

iScience
Summary: Early Earth’s UV-rich environment, together with abundant transition metals, likely shaped the stability of biomolecules. We investigated how cations influence the UV (254 nm) stability of diphenylalanine (FF).
Wei Tang, Xingyi Shi, Jianxun Shen, Haotian Mao, Erjun Wei, Biling Huang, Jianxi Ying, Huahuan Cai, Yufen Zhao   +8 more
doaj   +1 more source

The astrochemistry of diffuse interstellar clouds [PDF]

, 2004
This paper provides an overview of the current research activity at the AstroChemistry Group (ACG) of the Astronomical Observatory of Cagliari (OAC) in the National Institute for Astrophysics (INAF). Our team has been growing up since late ’80s: from our
Andrea Urru, Giacomo Mulas, Giuliano Malloci, Ignazio Porceddu, Silvia Casu, Emanuele Congiu   +5 more
core  

Infrared Spectroscopic and Physical Properties of Methanol Ices—Reconciling the Conflicting Published Band Strengths of an Important Interstellar Solid

The Astrophysical Journal
Infrared spectroscopic observations have established the presence of solid methanol (CH _3 OH) in the interstellar medium and in solar system ices, but the abundance of frozen CH _3 OH cannot be deduced without accurate band strengths, optical constants,
Reggie L. Hudson, Perry A. Gerakines, Yukiko Y. Yarnall   +2 more
doaj   +1 more source

The UMIST database for astrochemistry 1995

, 1996
We report the release of a new version of the UMIST database for astrochemistry. The database contains the rate coefficients of 3864 gas-phase reactions important in interstellar and circumstellar chemistry and involves 395 species and 12 elements.
Willacy, K., P. R. A. Farquhar, T. J. Millar, Farquhar, P.R.A., K. Willacy, Millar, TJ   +5 more
core   +1 more source

Astrochemistry [PDF]

Nature, 1971
openaire   +1 more source

Carbon Dioxide Ices—A Sexagennial Update of Infrared Intensities, Band Shapes, and the Formation and Destruction of Crystalline CO2

The Astrophysical Journal
The infrared (IR) band strengths most often used to quantify laboratory and astronomical spectra of CO _2 ices are now 60 yr old, from a time of slide rules and vacuum-tube technology.
Reggie L. Hudson, Yukiko Y. Yarnall, Christopher K. Materese   +2 more
doaj   +1 more source

Astrochemistry: an unfinished symphony

, 2009
Alex Dalgarno has introduced many of the themes that define current research in astrochemistry. Variations on these themes will continue to be played out well into the future. Clear and unambiguous tests of theories of formation of interstellar molecules
Black, John H, Black, John H.
core   +1 more source

Thermal Synthesis of Carbamic Acid and Its Dimer in Interstellar Ices: A Reservoir of Interstellar Amino Acids

ACS Central Science, 2023
Joshua H. Marks, Jia Wang, Bing-Jian Sun, Mason McAnally, Andrew M. Turner, Agnes H.-H. Chang, Ralf I. Kaiser   +6 more
doaj   +1 more source

Cretaceous-Paleogene boundary (KPB) Fish Clay at Højerup (Stevns Klint, Denmark): Ni, Co, and Zn of the black marl

Geologica Acta, 2009
The black marl of the Fish Clay at Højerup is mainly made up of biogenic calcite and cheto-Mg-smectite. We suggest that the formation of the smectite occurred during the latest Maastrichtian (or earlier) and that it represents a short period of rapid ...
P.I. PREMOVIC, B.Ž. TODOROVIĆ, M.N. STANKOVIĆ   +2 more
doaj