Results 201 to 210 of about 288,104 (243)

SPG4 and Dementia: Expanding the Clinical Spectrum

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Hereditary spastic paraplegia (HSP) is a group of disorders characterized by progressive spasticity and lower limb weakness, with mutations in SPG4/SPAST being the most common cause. Detailed studies and clinical and molecular comparisons across different populations are missing.
Emanuele Panza, Arun Meyyazhagan, Eliseo Picchi, Gustavo Ribas, Ingrid Faber, Ryosuke Miyamoto, Preethi Basavaraju, Paolo Eusebi, Haripriya Kuchi Bhotla, Mario Stasi, Fabrizio Gaudiello, Francesco Patti, Filippo Maria Santorelli, Marcondes Cavalcante França Jr, José Luiz Pedroso, Orlando Graziani Povoas Barsottini, Hélio Afonso Ghizoni Teive, Peter Henry St George‐Hyslop, Toshitaka Kawarai, Antonio Orlacchio   +19 more
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Evolution of Southern Star-Forming Regions

Astrophysics and Space Science, 1997
We present ISO observations of bright, high-mass southern star-forming regions with the Short Wavelength Spectrometer (SWS) and Long Wavelength Spectrometer (LWS). The selected targets show a range of pre-main sequence evolutionary phases. Whereas some objects still show interstellar ice features, the most evolved objects are coincident with ...
Ehrenfreund, P., Dishoeck, E.F., Burgdorf, M., Cami, J., van Hoof, P.A.M., Tielens, A.G.G.M., Schutte, W.A., Thi, W.F.D.   +7 more
openaire   +3 more sources

Chemistry of Star-Forming Regions

The Journal of Physical Chemistry A, 2005
The space between stars is not empty but contains gas-phase and particulate matter under varying conditions. Neutral matter is found mainly in large regions of the interstellar medium known as "clouds", the largest of which, termed "giant molecular clouds", are essentially molecular in nature.
openaire   +2 more sources

Carbon Dioxide in Star-forming Regions

The Astrophysical Journal, 2000
We consider the gas-phase chemistry of CO2 molecules in active regions. We show that CO2 molecules evaporated from dust in hot cores cannot be efficiently destroyed and are in fact copiously produced in cooler gas. When CO2-rich ices are sputtered in strong MHD shock waves, the increase in atomic hydrogen, due to H2 dissociation by ion-neutral ...
, Charnley, , Kaufman
openaire   +2 more sources

Star forming regions

Vistas in Astronomy, 1988
With recent improvements in the mm-wave, IR and high-sensitivity optical observations various new features of star formation embedded in dark clouds have been revealed. These are expanding shock fronts due to newly formed massive stars, gaseous disks surrounding proto stars, the energetic bipolar molecular flows, and the weRlcollimat'ed ionized jets ...
openaire   +1 more source

The star-forming region in Orion KL

Astronomy Letters, 2003
We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation.
Matveyenko, L. I., Zakharin, K. M., Diamond, P. J., Graham, D. A.   +3 more
openaire   +2 more sources

Magnetic massive stars in star forming regions

Proceedings of the International Astronomical Union, 2018
AbstractOne idea for the origin of magnetic fields in massive stars suggests that the magnetic field is the fossil remnant of the Galactic ISM magnetic field, amplified during the collapse of the magnetised gas cloud. A search for the presence of magnetic fields in massive stars located in active sites of star formation led to the detection of rather ...
Swetlana Hubrig, Markus Schöller, Silva P. Järvinen   +2 more
openaire   +1 more source

Star-Forming Regions

2012
Satisfactory assessments of star forming regions in the Galaxy are essential for the understanding of early stellar evolution and today a vast amout of astronomical studies are available. Star-forming regions distinguish themselves from other regions in the Galaxy. Many different physical processes are displayed with high levels of variability, a large
openaire   +1 more source

Molecular shocks in star forming regions

Astrophysics and Space Science, 1995
The role of excited molecular hydrogen as a powerful observational tool is examined in the context of shock phenomena in molecular clouds, particularly in star forming regions. Conclusions that may be drawn from line intensities and line profiles, and the properties of J and C shocks in a bow shock structure are discussed.
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Acetaldehyde in star-forming regions

Advances in Space Research, 2004
Abstract Observations of acetaldehyde (CH 3 CHO) in a survey of nine star-forming regions are presented. Emission is clearly detected from both the A and E symmetry states in the 4 04 –3 03 and 5 05 –4 04 transitions. Both the range of the measured CH 3 CHO column densities (∼4×10 12 –10 14 cm −2 ), and the derived fractional abundances, are in ...
openaire   +1 more source