Results 21 to 30 of about 274,489 (274)

Detections of SiO Masers from the Large-Amplitude Variables in the Galactic Nuclear Disk [PDF]

open access: yes, 2002
We have surveyed known large-amplitude variables within 15' of the Galactic center in the SiO J=1-0 v=1 and 2 maser lines at 43 GHz, resulting in 79 detections and 58 non-detections.
Deguchi, S.   +9 more
core   +2 more sources

SiO collimated outflows driven by high-mass YSOs in G24.78+0.08 [PDF]

open access: yes, 2012
We imaged the molecular outflows towards the cluster of high-mass young stellar objects G24.78+0.08 at high-angular resolution using SiO emission, which is considered the classical tracer of protostellar jets.
Beltran, M. T.   +6 more
core   +2 more sources

Pilot VLBI Survey of SiO v=3 J=1--0 Maser Emission around Evolved Stars [PDF]

open access: yes, 2012
In this Letter, we report detections of SiO v=3 J=1--0 maser emission in very long baseline interferometric (VLBI) observations towards 4 out of 12 long-period variable stars: WX Psc, R Leo, W Hya, and T Cep.
Cho, Se-Hyung   +11 more
core   +2 more sources

Evolution and excitation conditions of outflows in high-mass star-forming regions [PDF]

open access: yes, 2013
Theoretical models suggest that massive stars form via disk-mediated accretion, with bipolar outflows playing a fundamental role. A recent study toward massive molecular outflows has revealed a decrease of the SiO line intensity as the object evolves ...
Beltran, M. T.   +7 more
core   +4 more sources

Optical Properties of Doxorubicin Hydrochloride Load and Release on Silica Nanoparticle Platform

open access: yesMolecules, 2021
Silica nanoparticles (SiO2 NPs) synthesized by the Stober method were used as drug delivery vehicles. Doxorubicin hydrochloride (DOX·HCl) is a chemo-drug absorbed onto the SiO2 NPs surfaces.
Trong Nghia Nguyen   +9 more
doaj   +1 more source

Dense molecular clumps in the envelope of the yellow hypergiant IRC+10420 [PDF]

open access: yes, 2017
The circumstellar envelope of the hypergiant star IRC+10420 has been traced as far out in SiO J=2-1 as in CO J = 1-0 and CO J = 2-1, in dramatic contrast with the centrally condensed (thermal) SiO- but extended CO-emitting envelopes of giant and ...
Dinh-V-Trung, Lim, Jeremy, Wong, Ka-Tat
core   +2 more sources

Infrared Properties of SiO Maser Sources in Late-Type Stars [PDF]

open access: yes, 2000
Results of an SiO maser survey for the late-type stars selected by the IRTS (Infrared Telescope in Space) are presented. We have detected SiO J=1-0, v=1 and/or v=2 lines in 27 stars out of 59 stars. The maser intensity increases with the depth of the H2O
Freund, Minoru M.   +17 more
core   +3 more sources

Immobilized Gold Nanoparticles Prepared from Gold(III)-Containing Ionic Liquids on Silica: Application to the Sustainable Synthesis of Propargylamines

open access: yesMolecules, 2018
A cycloaurated phosphinothioic amide gold(III) complex was supported on amorphous silica with the aid of an imidazolium ionic liquid (IL) physisorbed in the SiO2 pores (SiO2⁻IL) and covalently bonded to the SiO2 (SiO2@IL).
Raquel Soengas   +3 more
doaj   +1 more source

On the Dependence of Band Alignment of SiO₂/Si Stack on SiO₂ Thickness: Extrinsic Or Intrinsic?

open access: yesIEEE Access, 2020
The dependence of band alignment of SiO2/Si stack on SiO2 thickness is restudied. The band structure of SiO2/Si stack is investigated by time-dependent X-ray photoelectron spectroscopy (XPS) with and without electron-compensation technology.
Yonggui Xu   +3 more
doaj   +1 more source

Genotoxicity and Gene Expression in the Rat Lung Tissue following Instillation and Inhalation of Different Variants of Amorphous Silica Nanomaterials (aSiO2 NM)

open access: yesNanomaterials, 2021
Several reports on amorphous silica nanomaterial (aSiO2 NM) toxicity have been questioning their safety. Herein, we investigated the in vivo pulmonary toxicity of four variants of aSiO2 NM: SiO2_15_Unmod, SiO2_15_Amino, SiO2_7 and SiO2_40.
Fátima Brandão   +16 more
doaj   +1 more source

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