Results 81 to 90 of about 1,779 (176)

Astrochemistry and Observations [PDF]

, 1997
8 pages, 6 figures in text, From Fourth Cologne-Bonn-Zermatt-Symposium, The Dense Interstellar Matter in ...
openaire   +2 more sources

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

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

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

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  

Computational Astrochemistry Journey towards the molecular universe

In astrochemistry, computational methods play a crucial role in addressing fundamental astronomical questions. Interstellar molecules profoundly influence the chemistry and physics of the interstellar medium (ISM), playing pivotal roles in planet formation and the emergence of life. Understanding their chemistry relies on theoretical approaches such as
Campisi, D., Perrero, J., Balucani, N.
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The Seasons of a Career in Physical Chemistry: Olivia Harper Wilkins. [PDF]

ACS Phys Chem Au
Wilkins OH, Shea JE, Scholes GD, Solomon GC.   +3 more
europepmc   +1 more source

Optical Anisotropy as a Probe of Proton Ordering at Ice Surfaces. [PDF]

J Chem Theory Comput
Muroni A, Pan D, Govoni M, Kupchak I, Pulci O.   +4 more
europepmc   +1 more source