| 1. |
- Aguar-Bartolome, P., et al.
(författare)
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Measurement of the gamma p -> K-0 Sigma(+) reaction with the Crystal Ball/TAPS detectors at the Mainz Microtron
- 2013
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Ingår i: Physical Review C (Nuclear Physics). - 0556-2813. ; 88:4
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Tidskriftsartikel (refereegranskat)abstract
- The gamma p -> K-0 Sigma(+) reaction has been measured from threshold to E-gamma = 1.45 GeV (W-CM = 1.9 GeV) using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. In the present experiment, this reaction was searched for in the 3 pi(0)p final state, by assuming K-S(0) -> pi(0)pi(0) and Sigma(+) -> pi(0)p. The experimental results include total and differential cross sections as well as the polarization of the recoil hyperon. The new data significantly improve empirical knowledge about the gamma p -> K-0 Sigma(+) reaction in the measured energy range. The results are compared to previous measurements and model predictions. It is demonstrated that adding the present gamma p -> K-0 Sigma(+) results to existing data allowed a better description of this reaction with various models.
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| 2. |
- Aguar-Bartolome, P., et al.
(författare)
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New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron
- 2014
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Ingår i: Physical Review C (Nuclear Physics). - 0556-2813. ; 89:4
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Tidskriftsartikel (refereegranskat)abstract
- The Dalitz decay eta -> e(+) e(-) gamma has been measured in the gamma p -> eta p reaction with the Crystal Ball and TAPS multiphoton spectrometers, together with the photon-tagging facility at the Mainz Microtron MAMI. The experimental statistic used in this work is one order of magnitude greater than in any previous measurement of eta -> e(+) e(-) gamma. The value obtained for the slope parameter Lambda(-2) of the eta transition form factor, Lambda(-2) = (1.95 +/- 0.15(stat) +/- 0.10(syst)) GeV-2, is in good agreement with recent measurements conducted in eta -> e(+) e(-) gamma and eta -> mu(+) mu(-) gamma decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Lambda(-2) is lower compared to results from previous measurements of the eta -> e(+) e(-) gamma decay.
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| 3. |
- Kashevarov, V. L., et al.
(författare)
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Experimental study of the gamma p -> pi (0)pi(0) p reaction with the Crystal Ball/TAPS detector system at the Mainz Microtron
- 2012
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Ingår i: Physical Review C (Nuclear Physics). - 0556-2813. ; 85:6
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Tidskriftsartikel (refereegranskat)abstract
- The gamma p -> pi(0)pi(0) p reaction has been measured from threshold to 1.4 GeV using the Crystal Ball and TAPS photon spectrometers together with the photon tagging facility at the Mainz Microtron. The experimental results include total and differential cross sections as well as specific angular distributions, which were used to extract partial-wave amplitudes. In particular, the energy region below the D-13(1520) resonance was studied.
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| 4. |
- Seufferlein, T, et al.
(författare)
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[S3-guideline exocrine pancreatic cancer]
- 2013
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Ingår i: Zeitschrift fur Gastroenterologie. - : Georg Thieme Verlag KG. - 1439-7803 .- 0044-2771. ; 51:12, s. 1395-1440
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Tidskriftsartikel (refereegranskat)
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| 5. |
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| 6. |
- Deckner, F., et al.
(författare)
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Jordförstärkning
- 2010
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Rapport (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Shahid, Syed Salman, et al.
(författare)
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Hippocampal-subfield microstructures and their relation to plasma biomarkers in Alzheimer's disease.
- 2022
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Ingår i: Brain : a journal of neurology. - : Oxford University Press (OUP). - 1460-2156. ; 145:6, s. 2149-2160
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Tidskriftsartikel (refereegranskat)abstract
- Hippocampal subfields exhibit differential vulnerabilities to Alzheimer's disease (AD)-associated pathology including abnormal accumulation of beta-amyloid deposition and neurofibrillary tangles. These pathological processes extensively impact on the structural and functional interconnectivities of the subfields and may explain the association between hippocampal dysfunction and cognitive deficits. In the present study, we investigated the degree of alterations in the microstructure of hippocampal subfields across the clinical continuum of AD. We applied a gray matter (GM) specific multi-compartment diffusion model (Cortical-NODDI) to understand the differential effects of AD pathology on the hippocampal subfield microstructure. A total of 119 participants were included in this cross-sectional study. Participants were stratified into three categories, cognitively normal (CN; N=47), mild cognitive impairment (MCI; N=52), and AD (N=19). Diffusion MRI, plasma biomarkers, and neuropsychological test scores were used to determine the association between the microstructural integrity and AD associated molecular indicators and cognition. For AD-related plasma biomarkers, we studied amyloid beta (Aβ), total tau (T-tau), and neurofilament light (NfL); for AD-related neuropsychological tests, we included the Trail Making Test (TMT), Rey Auditory Verbal Learning Test (RAVLT), Digit Span, and Montreal Cognitive Assessment (MoCA). Comparisons between CN and MCI showed significant microstructural alterations in the hippocampal cornu ammonis (CA) 4 and dentate gyrus (DG) region, whereas CA1-3 was the most sensitive region for the later stages in the AD clinical continuum. Among imaging metrics for microstructures, the volume fraction of isotropic diffusion for interstitial free water demonstrated the largest effect size in between-group comparisons. Regarding the plasma biomarkers, NfL appeared to be the most sensitive biomarker for associations with microstructural imaging findings in CA4-DG. CA1-3 was the subfield which had stronger correlations between cognitive performance and microstructural metrics. Particularly, poor performance in RAVLT and MoCA was associated with decreased intracellular volume fraction. Overall, our findings support the value of tissue-specific microstructural imaging for providing pathologically relevant information manifesting in the plasma biomarkers and neuropsychological outcomes across various stages of AD.
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