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- Rantakyrö, F.T., et al.
(författare)
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50 μas resolution VLBI images of AGN’s at λ3 mm
- 1998
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Ingår i: Astronomy and Astrophysics. - Berlin : Springer-Verlag. - 0004-6361 .- 1432-0746. ; 131, s. 451-467
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Tidskriftsartikel (refereegranskat)abstract
- We present 15 images from the global mm-VLBI sessions in 1990 April at 100 GHz and 1993 April at 86 GHz. These observations probe the central engines of the 16 observed AGN's with up to 50 mu as resolution. Among other sources previously observed with lambda 3 mm VLBI we present the first lambda 3 mm maps of 0735+178, 0748+126, 1055+018, 2145+067, and CTA102, in total we have been able to image 13 out of the 16 observed sources. 6 out of the 13 imaged sources observed exhibit curvature and rapid structural changes, although the low dynamic range in two thirds of the maps limits the detection of weak features. Most of the sources have unresolved cores even at this high resolution. There is substantial evidence that the observed sources can be grouped into two general groups: A misaligned population with parsec scale jets in the form of low pitch helices and an aligned population with straight jets with small changes in PA due to intrinsic bends.
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| 2. |
- Agui, A, et al.
(författare)
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Bulk and interface Al 2p core excitons in GaAs/AlAs/GaAs heterostructures
- 1999
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Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 59:16, s. 10792-10795
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Aluminum 2p soft-x-ray emission and absorption spectra (XES and XAS) of a GaAs/AIAs/GaAs heterostructure semiconductor have been measured with high-energy resolution. The Al 2p XES shows a similar feature to that of AlxGa1-xAs alloys. Strong Al 2p core ex
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| 3. |
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| 4. |
- Inoue, K, et al.
(författare)
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Angular dependence of Al-2p X-ray yield spectra of GaAs/AlAs/GaAs heterostructures
- 1999
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Ingår i: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS. - : JAPAN J APPLIED PHYSICS. - 0021-4922. ; 38, s. 572-575
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The X-ray emission yield by the Al-2p core-exciton excitation in GaAs/AlAs/GaAs heterostructures is studied theoretically: especially the angular correlation between absorbed and emitted X-rays are discussed. It becomes clear that the angular dependence o
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| 8. |
- Usami, S., et al.
(författare)
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Calbindin-D28K localization in the primate inner ear
- 1995
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Ingår i: Journal for Oto-Rhino-Laryngology. - 0301-1569 .- 1423-0275. ; 57:2, s. 94-9
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Tidskriftsartikel (refereegranskat)abstract
- The distribution of one of the calcium-binding proteins, calbindin-D28K (CB-D28K), was studied in the adult human and squirrel monkey inner ear by means of immunocytochemical methods. Inner and outer hair cells in the organ of Corti and vestibular hair cells showed CB-D28K immunoreactivity, though some vestibular hair cells were devoid of immunoreactivity. In the spiral and vestibular ganglion, immunoreactive cells were found in both the squirrel monkey and human. The present results indicate that CB-D28K is localized within afferent neuronal components in these sensory organs and may regulate Ca++ levels for optimal neurotransmission in the primate auditory and vestibular systems. This study also provides evidence of two nonneuronal localizations of CB-D28K in the squirrel monkey. Subpopulations of fibrocytes in the spiral ligament and vestibular end organs were enriched with CB-D28K, suggesting that these cells are possibly equipped with the function to regulate Ca++ concentration in the perilymphatic fluid. In the maculae, many CB-D28K-immunoreactive particles were found in the otoconial membrane, indicating that CB-D28K may participate in the formation of otoconia.
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