| 1. |
|
|
| 2. |
- Olofsson, Henrik, 1972, et al.
(författare)
-
Profiling the EMBRACE tile beam using GPS satellite carriers
- 2009
-
Ingår i: Proceedings of Science. - 1824-8039. ; 132, s. 253-257
-
Konferensbidrag (refereegranskat)abstract
- All rights reserved. The L2C carriers of multiple GPS satellites have been used to trace out a nearly complete beam pattern out to 45 away from the main lobe centre for a horizontally mounted single EMBRACE tile. The beam was formed along its bore-sight direction, i.e., staring at the local sky zenith. The result is very close to design specifications although there is evidence for at least one side lobe rising above the achieved noise level. We have also used the older L2 carrier to estimate the system temperature, although an exact figure in addition requires knowledge of the aperture efficiency. © 2018 Sissa Medialab Srl.
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
- Byler, Stefanie, et al.
(författare)
-
Systemic lipopolysaccharide plus MPTP as a model of dopamine loss and gait instability in C57Bl/6J mice
- 2009
-
Ingår i: Behavioural Brain Research. - : Elsevier BV. - 0166-4328. ; 198:2, s. 434-439
-
Tidskriftsartikel (refereegranskat)abstract
- In most environmental models of Parkinson's disease (PD), a single neurodegenerative agent is introduced to cause nigrostriatal clopamine depletion. However, cell loss in human PD often might derive, at least in part. from multiple toxins or vulnerabilities, any one of which alone does not inevitably lead to chronic dopamine depletion. In the present research, male C57BL/6J mice were systemically administered the inflammatory bacterial endotoxin, lipopolysaccharide (LPS) and the neurotoxin 1-methyl-4-phenyl1,2,3,6-tetrahydropyridine (MPTP) alone or in combination and the behavior as well as striatal dopamine levels were compared to saline-treated mice. Mice in the combination (LPS + MPTP) group, but not in the single-factor groups, showed both dopamine depletion and parkinsonian symptoms, i.e., reduced stride length, at 4 months post-injection. MPTP alone acutely reduced striatal dopamine levels but this effect was transient as striatal dopamine recovered to normal levels after time (4 months). The LPS-only group showed no dopamine depletion or reduced stride length. These data are consistent with the view that nigrostriatal dopamine neurons might succumb after time to multiple toxic agents that independently may have only a transient, adverse effect. (C) 2008 Elsevier B.V. All rights reserved.
|
|
| 7. |
- Rubesova, Erika, et al.
(författare)
-
Three-dimensional MRI volumetric measurements of the normal fetal colon
- 2009
-
Ingår i: American Journal of Roentgenology. - United States : American Roentgen Ray Society. - 0361-803X .- 1546-3141. ; 192:3, s. 761-765
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: The use of fetal MRI markedly improves characterization of abdominal congenital anomalies. Accurate prenatal diagnosis of the level and cause of congenital intestinal obstruction is desired for optimal parental counseling and perinatal care. Because accurate diagnosis would be aided by nomograms of colonic volume, this study was conducted to determine normal colonic volumes at different gestational ages. MATERIALS AND METHODS: This retrospective study consisted of a review of 83 fetal MRI examinations performed on fetuses with no gastrointestinal abnormalities. MRI was performed with a 1.5-T system. Axial, sagittal, and coronal T1-weighted fast gradient-refocused echo images were acquired at TR/TE, 165/2.6; flip angle, 90 degrees; matrix size, 384 x 192; slice thickness, 5 mm; field of view, 38 cm(2). Two investigators determined the region of interest in the colon by outlining areas of high signal intensity of meconium slice by slice. They then calculated colonic luminal volume in the regions of interest. Colonic luminal volumes were reported relative to gestational age and abdominal circumference. Normative curves were generated, and interobserver and intraobserver analyses were performed. RESULTS: Seventeen of the 83 fetuses (20%) were excluded because of movement artifacts on the images. Normal colonic luminal volume increased exponentially with gestational age and abdominal circumference. The range of colonic luminal volumes at 20-37 weeks' gestational age was 1.1-65 mL. Variation of volume was greater at advanced gestational age. Interobserver and intraobserver correlation was good. CONCLUSION: This study yielded preliminary volumetric measurements of the normal fetal colon at 20-37 weeks of gestational age that suggest the fetal colon grows exponentially.
|
|
| 8. |
|
|
