Results 21 to 30 of about 273,089 (299)

Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh-resolution FT-ICR mass spectrometry [PDF]

open access: yesAtmospheric Chemistry and Physics, 2013
Clouds alter the composition of atmospheric aerosol by acting as a medium for interactions between gas- and particulate-phase substances. To determine the cloud water atmospheric organic matter (AOM) composition and study the cloud processing of aerosols,
Y. Zhao, A. G. Hallar, L. R. Mazzoleni
doaj   +1 more source

Evidence for a Molecular Cloud Origin for Gamma-Ray Bursts: Implications for the Nature of Star Formation in the Universe [PDF]

open access: yes, 2001
It appears that the majority of rapidly-, well-localized gamma-ray bursts with undetected, or dark, optical afterglows, or `dark bursts' for short, occur in clouds of size R > 10L_{49}^{1/2} pc and mass M > 3x10^5L_{49} M_{sun}, where L is the isotropic ...
Dal Fiume D.   +7 more
core   +2 more sources

Cloud-Based Software Architecture for Fully Automated Point-of-Care Molecular Diagnostic Device

open access: yesSensors, 2021
This paper proposes a cloud-based software architecture for fully automated point-of-care molecular diagnostic devices. The target system operates a cartridge consisting of an extraction body for DNA extraction and a PCR chip for amplification and ...
Byeong-Heon Kil   +5 more
doaj   +1 more source

Outer-Galaxy molecular clouds [PDF]

open access: yesSymposium - International Astronomical Union, 1985
Since our original report of CO emission from outside the solar circle in the first quadrant (Kutner and Mead, 1981) we have extended the observations in two ways: (1) We have improved latitude and longitude coverage. Preliminary results on the latitude distribution were reported by Kutner (1983).
Marc L. Kutner, Kathryn N. Mead
openaire   +1 more source

Re-examining Larson's Scaling Relationships in Galactic Molecular Clouds [PDF]

open access: yes, 2009
The properties of Galactic molecular clouds tabulated by Solomon etal (1987) (SRBY) are re-examined using the Boston University-FCRAO Galactic Ring Survey of 13CO J=1-0 emission.
Bloemen   +19 more
core   +1 more source

Statistical study of dust properties in LMC molecular clouds [PDF]

open access: yes, 2010
The objective of this paper is to construct a catalog providing the dust properties and the star formation efficiency (SFE) of the molecular clouds in the Large Magellanic Cloud (LMC).
Akiko Kawamura   +36 more
core   +2 more sources

Fragmentation in molecular clouds [PDF]

open access: yesSymposium - International Astronomical Union, 1991
B209. Fragments are detected in the outer parts of the B209 molecular cloud in a region of density 1000 cm−3 using 12CO, 13CO, H2CO, IRAS 60 and 100 μm images, discernable as velocity components, and have characteristics: <Rfragment>∼ 0.4 pc; <Mfragment>∼ 2 M⊙; <MVRfragment>∼ 1.6 M⊙ km/s pc; Tgas ∼ 11 K; Tdust> ∼ 16 K??. The system
Frank O. Clark   +2 more
openaire   +1 more source

An Investigation of the Entropy Associated with a Collapsing Molecular Cloud

open access: yesAstronomy
The investigation of entropy variation during the star formation process within collapsing molecular clouds represents a significant field of inquiry in astrophysics.
Gemechu Muleta Kumssa
doaj   +1 more source

Threshold between Spontaneous and Cloud-Collisional Star Formation

open access: yes, 2006
Based on simple physical and geometric assumptions, we have calculated the mean surface molecular density of spiral galaxies at the threshold between star formation induced by cloud-cloud collision and spontaneous gravitational collapse.
Egusa, Fumi   +2 more
core   +1 more source

Possibilities for Methanogenic and Acetogenic Life in Molecular Clouds

open access: yesLife
According to panspermia, life on Earth may have originated from life forms transported through space from elsewhere. These life forms could have passed through molecular clouds, where the process of methanogenesis could have provided enough energy to ...
Lei Feng
doaj   +1 more source

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