@article{JanssenHoffmannKannoetal.2020, author = {Janssen, Jan P. and Hoffmann, Jan V. and Kanno, Takayuki and Nose, Naoko and Grunz, Jan-Peter and Onoguchi, Masahisa and Chen, Xinyu and Lapa, Constantin and Buck, Andreas K. and Higuchi, Takahiro}, title = {Capabilities of multi-pinhole SPECT with two stationary detectors for in vivo rat imaging}, series = {Scientific Reports}, volume = {10}, journal = {Scientific Reports}, doi = {10.1038/s41598-020-75696-0}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-230616}, year = {2020}, abstract = {We aimed to investigate the image quality of the U-SPECT5/CT E-Class a micro single-photon emission computed tomography (SPECT) system with two large stationary detectors for visualization of rat hearts and bones using clinically available \(^{99m}\)Tc-labelled tracers. Sensitivity, spatial resolution, uniformity and contrast-to-noise ratio (CNR) of the small-animal SPECT scanner were investigated in phantom studies using an ultra-high-resolution rat and mouse multi-pinhole collimator (UHR-RM). Point source, hot-rod, and uniform phantoms with \(^{99m}\)Tc-solution were scanned for high-count performance assessment and count levels equal to animal scans, respectively. Reconstruction was performed using the similarity-regulated ordered-subsets expectation maximization (SROSEM) algorithm with Gaussian smoothing. Rats were injected with similar to 100 MBq [\(^{99m}\)TcTc-MIBI or similar to 150 MBq [\(^{99m}\)Tc]Tc-HMDP and received multi-frame micro-SPECT imaging after tracer distribution. Animal scans were reconstructed for three different acquisition times and post-processed with different sized Gaussian filters. Following reconstruction, CNR was calculated and image quality evaluated by three independent readers on a five-point scale from 1="very poor" to 5="very good". Point source sensitivity was 567 cps/MBq and radioactive rods as small as 1.2 mm were resolved with the UHR-RM collimator. Collimator-dependent uniformity was 55.5\%. Phantom CNR improved with increasing rod size, filter size and activity concentration. Left ventricle and bone structures were successfully visualized in rat experiments. Image quality was strongly affected by the extent of post-filtering, whereas scan time did not have substantial influence on visual assessment. Good image quality was achieved for resolution range greater than 1.8 mm in bone and 2.8 mm in heart. The recently introduced small animal SPECT system with two stationary detectors and UHR-RM collimator is capable to provide excellent image quality in heart and bone scans in a rat using standardized reconstruction parameters and appropriate post-filtering. However, there are still challenges in achieving maximum system resolution in the sub-millimeter range with in vivo settings under limited injection dose and acquisition time.}, language = {en} } @article{Rudolf2014, author = {Rudolf, Daniel}, title = {Die Evaluation des wissenschaftlichen Wertes elektronischer Zeitschriften nach einem Modell der California Digital Library}, series = {Information - Wissenschaft \& Praxis}, journal = {Information - Wissenschaft \& Praxis}, doi = {10.1515/iwp-2014-0027}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-101242}, year = {2014}, abstract = {Es wird eine Methode der California Digital Library (CDL) zur Zeitschriftenevaluation beschrieben. Diese vergleicht die Aspekte N{\"u}tzlichkeit, Qualit{\"a}t und Kosteneffizienz der untersuchten Titel. Es folgt der Bericht {\"u}ber eine Anwendung der Methode auf die elektronischen Zeitschriften der Teilbibliothek (TB) Biologie (118 Titel) und der TB Chemie (88 Titel) der Universit{\"a}tsbibliothek W{\"u}rzburg f{\"u}r das Jahr 2012. Auf ausgew{\"a}hlte Ergebnisse wird n{\"a}her eingegangen. Diese werden mit den Ergebnissen einer Bewertung nach Kosten pro Nutzung verglichen.}, language = {de} } @article{OervoessyKoroesiBataryetal.2014, author = {Oervoessy, Noemi and Koroesi, Adam and Batary, Peter and Vozar, Agnes and Peregovits, Laszlo}, title = {Habitat Requirements of the Protected Southern Festoon (Zerynthia Polysena); Adult, Egg and Larval Distribution in a Highly Degraded Habitat Complex}, series = {Acta Zoologica Academiae Scientiarum Hungaricae}, volume = {60}, journal = {Acta Zoologica Academiae Scientiarum Hungaricae}, number = {4}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-117810}, pages = {371-387}, year = {2014}, abstract = {Habitat quality affects the presence and size of butterfly populations. Resources for all life stages must be found in a given or few habitat patches. Southern festoon (Zerynthia polyxena) is a vulnerable, but locally abundant species in Hungary. The larva requires birthwort (Aristolochia clematitis) as food plant. We examined the small scale habitat use of adults and distribution of eggs and larvae among different vegetation types to reveal the requirements of the species in all life stages. Transect counts were conducted in a tree plantation complex comprising four types of vegetation. Number (+/- SE) of adults, eggs and larvae were lowest in poplar plantation (adult 0.3 +/- 0.2, egg 1.1 +/- 1.1, larva 0.6 +/- 0.3). Medium amount of butterflies were observed in open (adult 8.3 +/- 2.9, egg 3.1 +/- 2.6, larva 3.1 +/- 1.9) and black-locust (adult 9.4 +/- 4.2, egg 12.7 +/- 4.9, larva 4.1 +/- 1.1) habitat. Number of butterflies was highest in hummocks (adult 13.5 +/- 1.5, egg 12.9 +/- 5.7, larva 8.4 +/- 2.1). Adults avoided bare ground. We encountered most eggs in dense food plant patches with high plants. Food plant height also positively influenced the occurrence of the larvae. Although distribution of adults and juvenile forms showed quite similar patterns, we could also reveal some differences that caused by different environmental conditions in distinct vegetation types. Our study stresses the importance of habitat quality, which affects population size of butterflies even in a highly degraded habitat complex.}, language = {en} } @article{GabrielJirůHillmannKraftetal.2020, author = {Gabriel, Katharina M. A. and J{\´i}rů-Hillmann, Steffi and Kraft, Peter and Selig, Udo and R{\"u}cker, Victoria and M{\"u}hler, Johannes and D{\"o}tter, Klaus and Keidel, Matthias and Soda, Hassan and Rascher, Alexandra and Schneider, Rolf and Pfau, Mathias and Hoffmann, Roy and Stenzel, Joachim and Benghebrid, Mohamed and Goebel, Tobias and Doerck, Sebastian and Kramer, Daniela and Haeusler, Karl Georg and Volkmann, Jens and Heuschmann, Peter U. and Fluri, Felix}, title = {Two years' experience of implementing a comprehensive telemedical stroke network comprising in mainly rural region: the Transregional Network for Stroke Intervention with Telemedicine (TRANSIT-Stroke)}, series = {BMC Neurology}, volume = {20}, journal = {BMC Neurology}, doi = {10.1186/s12883-020-01676-6}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-229214}, year = {2020}, abstract = {Background Telemedicine improves the quality of acute stroke care in rural regions with limited access to specialized stroke care. We report the first 2 years' experience of implementing a comprehensive telemedical stroke network comprising all levels of stroke care in a defined region. Methods The TRANSIT-Stroke network covers a mainly rural region in north-western Bavaria (Germany). All hospitals providing acute stroke care in this region participate in TRANSIT-Stroke, including four hospitals with a supra-regional certified stroke unit (SU) care (level III), three of those providing teleconsultation to two hospitals with a regional certified SU (level II) and five hospitals without specialized SU care (level I). For a two-year-period (01/2015 to 12/2016), data of eight of these hospitals were available; 13 evidence-based quality indicators (QIs) related to processes during hospitalisation were evaluated quarterly and compared according to predefined target values between level-I- and level-II/III-hospitals. Results Overall, 7881 patients were included (mean age 74.6 years +/- 12.8; 48.4\% female). In level-II/III-hospitals adherence of all QIs to predefined targets was high ab initio. In level-I-hospitals, three patterns of QI-development were observed: a) high adherence ab initio (31\%), mainly in secondary stroke prevention; b) improvement over time (44\%), predominantly related to stroke specific diagnosis and in-hospital organization; c) no clear time trends (25\%). Overall, 10 out of 13 QIs reached predefined target values of quality of care at the end of the observation period. Conclusion The implementation of the comprehensive TRANSIT-Stroke network resulted in an improvement of quality of care in level-I-hospitals.}, language = {en} } @phdthesis{Lang2002, author = {Lang, Thomas}, title = {Vergleich der rheologischen Qualit{\"a}t von Erythrozytenkonzentraten, gewonnen durch herk{\"o}mmliche Vollblutspende oder Multikomponentenspende und Einfluß der Entnahmeverfahren auf ausgew{\"a}hlte rheologische Laborparameter und in-vivo-Mikrozirkulation des Spenders}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-6055}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2002}, abstract = {20 Probanden nahmen im prospektiven Paarvergleich im Abstand von mindestens 8 Wochen im cross-over-Verfahren an je einer Vollblutspende (VBS) und einer maschinellen Multikomponentenspende (MKS) teil. Die erzeugten leukozyten-depletierten Erythrozytenkonzentrate beider Gruppen wurden mittels CPD-50 antikoaguliert und {\"u}ber einen Zeitraum von 63 Tagen in PAGGS-Mannitol gelagert. Beurteilt wurden zum einen rheologische in-vitro-Parameter bei Spendern und Blutkonserven in zweiw{\"o}chentlichen Abst{\"a}nden: oszillierende Kapillarviskosimetrie, Erythrozytenaggregometrie und Filtrometrie. Zudem kam bei den Maschinenspendern die neue Methode der Laser-Doppler-Anemometrie zur Ermittlung der kapill{\"a}ren in-vivo-Blutflußgeschwindigkeit in Einzelkapillaren zur Anwendung. Konkordant kam es in beiden Gruppen zum Ansteigen der visk{\"o}sen Viskosit{\"a}t der Erythrozytenkonzentrate mit {\"u}berproportionalem Anstieg nach 7 Wochen Lagerung. Die elastische Viskosit{\"a}t stieg ebenfalls in beiden Gruppen an, hier wurden in der Gruppe der Vollblutspender bereits zu Beginn deutlich h{\"o}here Werte gemessen, welche in der Vergleichsgruppe erst nach 49 Tagen erreicht wurden. Bei den Blutspendern konnten 24 Stunden nach Spende Ver{\"a}nderungen von visk{\"o}ser und elastischer Viskosit{\"a}t gezeigt werden, welche stark mit Erythrozytenanzahl, H{\"a}moglobin und H{\"a}matokrit korrelierten. Bei konstanten Werten der dynamischen Erythrozytenaggregation zeigte die statische Erythrozytenaggregation bei den Vollblutspenden nach drei Wochen eine Zunahme, in der MKS-Gruppe imponierte ein biphasisches Verhalten mit initialer Abnahme der Lichttransmission. Unabh{\"a}ngig vom Spendeverfahren, trat eine deutliche Abnahme der Filtrierbarkeit der Produkte in beiden Gruppen in den letzten beiden Lagerungswochen auf. Eindrucksvoll war die Reduktion der Filterokklusionsrate auf unter 40 \% des Ausgangswertes durch Leukozytenfiltration vor der Lagerung. Bereits 1 Stunde nach der Spende konnten filtrometrische Ver{\"a}nderungen bei den Spendern gezeigt werden, das Signifikanzniveau wurde hier nur knapp verfehlt. Die Bestimmung der kapill{\"a}ren Blutflußgeschwindigkeit zeigte eine Stunde nach Spende eine deutliche Abnahme auf 81 \% des Ausgangswertes (p=0,064) in der Gruppe der Maschinenspender. Dies wird als Ausdruck einer diskreten Kreislaufbelastung durch das Aphereseverfahren gewertet.}, language = {de} }