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Ploos van Amstel, S., M. Noordzij, B. A. Warady, F. Cano, J. C. Craig, J. W. Groothoff, K. Ishikura, A. Neu, H. Safouh, H. Xu, et al., Renal replacement therapy for children throughout the world: the need for a global registry, , vol. 33, issue 5, pp. 863 - 871, 2018. AbstractWebsite

To describe the factors affecting the incidence of renal replacement therapy (RRT) among children, information from RRT registries is required. We aimed to give an overview of existing pediatric RRT registries worldwide, identify regions with a need to commence or increase data collection on pediatric RRT, and provide a rationale for developing a global RRT registry.

Plourde, R., H. H. Zedan, and J. P. Lamoine, "Biotransformation de la progesterone par les spores et les cellules vegetatives de microorganismes provenant du sol Quebecois", Rev. Can. Biol. , vol. 33, pp. 111-116, 1974.
Poacholewska, A., M. Drögemüller, J. Klukowska-Rötzler, S. Lanz, E. Hamza, E. Dermitzakis, E. Marti, V. Gerber, T. Leeb, and V. Jagannatha, "Transcriptome of equine peripheral blood mononuclear cells.", PLOS ONE, vol. 10(3), issue e0122011, 2015.
Poe, D. S., and B. M. N. Hanna, "Eustachian Tube Dysfunction", UpToDate , 2009.
Poe, D. S., and B. M. N. Hanna, "Balloon dilation of the cartilaginous portion of the eustachian tube: initial safety and feasibility analysis in a cadaver model", American Journal of Otolaryngology, vol. 32, no. 2, pp. 115 - 123, 2011. AbstractWebsite

Background Balloon catheter dilation of diseased sinus ostia has recently demonstrated efficacy and safety in the treatment of chronic sinus disease with 2 years of follow-up. Similar to sinus surgery, initial studies of partial resection of inflamed mucosa from within the cartilaginous eustachian tube (ET) have demonstrated efficacy and safety in the treatment of medically refractory otitis media with effusion. Therefore, balloon dilation of the cartilaginous \{ET\} was investigated as a possible treatment modality for otitis media. Methods A protocol for sinus balloon catheter dilation was evaluated in each of the cartilaginous \{ETs\} in 8 fresh human cadaver heads. Computed tomographic scans and detailed endoscopic inspections with video or photographic documentation were performed pre- and posttreatment, and gross anatomical dissections were done to analyze the effects of treatment and to look for evidence of undesired injury. Results Catheters successfully dilated all cartilaginous \{ETs\} without any significant injuries. There were no bony or cartilaginous fractures, and 3 specimens showed minor mucosal tears in the anterolateral or inferior walls. Volumetric measurements of the cartilaginous \{ET\} lumens showed a change from an average of 0.16 to 0.49 cm3 (SD, 0.12), representing an average increase of 357% (range, 20–965%). Conclusions Balloon catheter dilation of the nasopharyngeal orifice of the \{ET\} was shown to be feasible and without evidence of untoward injury. A significant increase in volume of the cartilaginous \{ET\} was achieved. A clinical study is now indicated to determine whether balloon dilation will demonstrate lasting benefits and safety in the treatment of otitis media.

Pohll, G., A. E. Hassan, J. B. Chapman, C. Papelis, and R. Andricevic, "Modeling Groundwater Flow and Radioactive Transport in a Fractured Aquifer", Groundwater, vol. 37, issue 5, pp. 770-784, 1999.
Pohll, G., K. Pohlmann, A. E. Hassan, J. B. Chapman, and T. Mihevic, "Assessing Groundwater Model Uncertainty for the Central Nevada Test Area", Spectrum 2002, 9th Biennial International Conference on Nuclear and hazardous Waste Management, Reno, Nevada, USA, 4 - 8 August, 2002.
Pohlmann, K., A. E. Hassan, and J. B. Chapman, "Modeling Density-Driven Flow and Radionuclide Transport at an Underground Nuclear Test: Uncertainty Analysis and Effect of Parameter Correlation", Water Resources Research, vol. 38, issue 5, pp. 10.1029/2001WR1047, 2002.
Pohlmann, K., J. B. Chapman, G. Pohll, A. E. Hassan, and P. Sanders, ", Integrating Numerical Modeling and Data Collection for Site Characterization at the Shoal Underground Nuclear Test Site, Nevada, USA", Spectrum 2002, 9th Biennial International Conference on Nuclear and hazardous Waste Management, Reno, Nevada, USA, 4 - 8 August, 2002.
Pohlmann, K., A. E. Hassan, and J. B. Chapman, "Description of Hydrogeologic Heterogeneity and Evaluation of Radionuclide Transport at an Underground Nuclear Test", Journal of Contaminant Hydrology, vol. 44, pp. 353-386, 2000.
Pokharel, K., J. Peippo, M. Honkatukia, A. Seppälä, J. Rautiainen, N. Ghanem, T. - M. Hamama, M. A. Crowe, M. Andersson, M. - H. Li, et al., "Integrated ovarian mRNA and miRNA transcriptome profiling characterizes the genetic basis of prolificacy traits in sheep (Ovis aries).", BMC genomics, vol. 19, issue 1, pp. 104, 2018 01 29. Abstract

BACKGROUND: The highly prolific breeds of domestic sheep (Ovis aries) are globally valuable genetic resources for sheep industry. Genetic, nutritional and other environmental factors affect prolificacy traits in sheep. To improve our knowledge of the sheep prolificacy traits, we conducted mRNA-miRNA integrated profiling of ovarian tissues from two pure breeds with large (Finnsheep) vs. small (Texel) litter sizes and their F1 crosses, half of which were fed a flushing diet.

RESULTS: Among the samples, 16,402 genes (60.6% known ovine genes) were expressed, 79 novel miRNAs were found, and a cluster of miRNAs on chromosome 18 was detected. The majority of the differentially expressed genes between breeds were upregulated in the Texel with low prolificacy, owing to the flushing diet effect, whereas a similar pattern was not detected in the Finnsheep. F1 ewes responded similarly to Finnsheep rather than displaying a performance intermediate between the two pure breeds.

CONCLUSIONS: The identification and characterization of differentially expressed genes and miRNAs in the ovaries of sheep provided insights into genetic and environmental factors affecting prolificacy traits. The three genes (CST6, MEPE and HBB) that were differentially expressed between the group of Finnsheep and Texel ewes kept in normal diet appeared to be candidate genes of prolificacy traits and will require further validation.

Polacek, N., M. Gaynor, A. Yassin, and A. S. Mankin, "Ribosomal Peptidyl Transferase can withstand Mutations at the Putative Catalytic Nucleotide", Nature, vol. 411, issue 6836, pp. 498-501, 2001.
Polacek, N., M. Gaynor, A. Yassin, and A. S. Mankin, "Ribosomal peptidyl transferase can withstand mutations at the putative catalytic nucleotide", Nature, vol. 411, no. 6836: Nature Publishing Group, pp. 498–501, 2001. Abstract
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Polat, M., and M. I. El Sabry, "The Effects of Essential Oils Dietary Supplementation on Feeding Behavior of Sheep under Organic Animal Husbandry", Journal of Animal and Veterinary Advances , vol. 13, issue 5, pp. 344-349, 2014.
Polednik, M., Y. Abo-Madyan, F. Schneider, D. Wolff, B. Bannach, U. Lambrecht, A. Wallin, M. Cwiekala, K. Maurer, F. Reif, et al., "Filmdosimetrische Evaluation verschiedener Dosisberechnungsalgorithmen für die konventionelle Bestrahlungstechnik des Mammakarzinoms", Strahlentherapie und Onkologie, vol. 183: Urban & Vogel, pp. 667–672, 2007. Abstract

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Polednik, M., Y. Abo-Madyan, F. Schneider, D. Wolff, B. Bannach, U. Lambrecht, A. Wallin, M. Cwiekala, K. Maurer, F. Reif, et al., "Evaluation of calculation algorithms implemented in different commercial planning systems on an anthropomorphic breast phantom using film dosimetry", Strahlentherapie und Onkologie, vol. 183, no. 12: Springer, pp. 667–672, 2007. AbstractWebsite

Purpose:

To evaluate the accuracy of dose calculation algorithms of different planning systems for postoperative tangential radiotherapy in breast cancer.
Material and Methods:

On a CT dataset of an anthropomorphic phantom, a structure set of the left lung, clinical target volume (CTV), planning target volume, heart, and external contour were delineated. The dataset was processed by six radiation oncology centers participating in this multicenter dosimetry project. Conventional plans with two tangential wedged fields were generated in MasterPlan®, Pinnacle®, Eclipse®, TMS®, and PrecisePLAN®. Plan calculations were done using the beam data of local linacs. The dose distributions were verified under local conditions with Gafchromic®-EBT films.
Results:

In all planning systems, deviations between calculation and measurement were around ±3% in the CTV in the measured plane. Only small areas with deviations of ±5% were detected. Pencil-beam (PB) calculations overestimated the dose inside the lung by up to 23%. Collapsed cone (CC) underestimated the lung dose by up to 6%.
Conclusion:

CC calculates the dose distribution more accurately than PB. Inside regions with electron disequilibrium, however, the dose is slightly underestimated.
Ziel:

Evaluation der Dosisberechnungsgenauigkeit von Algorithmen, implementiert in verschiedene Planungssysteme für die konventionelle tangentiale Bestrahlungstechnik des Mammakarzinoms.
Material und Methodik:

CT-Daten eines anthropomorphen Phantoms mit eingezeichneten Konturen von linker Lunge, Herz, Planungszielvolumen, klinischem Zielvolumen (CTV) und Außenkontur wurden von sechs an dieser Studie teilnehmenden Kliniken verwendet. Bestrahlungspläne mit zwei tangentialen Keilfilterfeldern wurden in MasterPlan®, Pinnacle®, Eclipse®, TMS® und PrecisePLAN® generiert. Die Berechnungen der Pläne wurden mit den lokalen Maschinenbasisdaten durchgeführt. Die berechneten Dosisverteilungen wurden vor Ort in den teilnehmenden Kliniken mit Gafchromic®-EBT-Filmen verifiziert.
Ergebnisse:

Alle untersuchten Dosisberechnungsalgorithmen zeigten eine vergleichbare Genauigkeit im CTV. Die Differenz zwischen der Berechnung und Messung betrug ±3%, in kleinen Bereichen bis ±5% in der gemessenen Schicht. Im Lungenbereich wurde die Dosis durch Pencil Beam (PB) bis zu 23% überschätzt. Collapsed Cone (CC) unterschätzte die Lungendosis in bis zu 6%.
Schlussfolgerung:

In Volumina ohne Sekundärelektronengleichgewicht ist die Dosisberechnung mit CC genauer, liefert allerdings für die absorbierte Dosis zu niedrige Werte, im Gegensatz zu deutlich überhöhten Werten bei PB

Polednik, M., Y. Abo-Madyan, B. Bannach, U. Lambrecht, A. Wallin, M. Cwiekala, K. Maurer, F. Lohr, and F. Wenz, "Evaluation of Different Calculation Algorithms for Breast Radiotherapy Using Film Dosimetry", International Journal of Radiation Oncology* Biology* Physics, vol. 69, no. 3: Elsevier, pp. S230, 2007. Abstract

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Polednik, M., Y. Abo-Madyan, F. Schneider, D. Wolff, B. Bannach, U. Lambrecht, A. Wallin, M. Cwiekala, U. Haedinger, F. Lohr, et al., "Filmdosimetrische Evaluation der in verschiedenen kommerziellen Planungssystemen implementierten Dosisberechnungsalgorithmen für die konventionelle Bestrahlungstechnik des Mammakarzinoms", Senologie-Zeitschrift für Mammadiagnostik und-therapie, vol. 4, no. 02, pp. A90, 2007. AbstractWebsite

Hintergrund und Ziel: Evaluation der Genauigkeit der Dosisberechnung, der in verschiedenen Planungssystemen implementierten Dosisberechnungsalgorithmen, für die konventionelle tangentiale Bestrahlungstechnik des Mammakarzinomes.

Patient und Methoden: CT-Daten eines anthropomorphen Phantoms, bestehend aus der linken und rechten Lunge und Imitation der linken Brust sowie Konturen von Herz, linker Lunge, PTV, CTV und Außenkontur, wurden zu fünf an dieser Studie teilnehmenden Kliniken gesendet. Bestrahlungspläne mit zwei tangentialen Keilfilterfeldern wurden in MasterPlan®, Pinnacle®, Eclipse®, TMS® und PrecisePLAN® generiert. Die Dosisverteilungen wurden in MasterPlan®, Eclipse®, TMS® und PrecisePLAN® mit einem Pencil Beam Algorithmus und in Pinnacle® und MasterPlan® mit einem Collapsed Cone Algorithmus berechnet. Die Messung der Pläne wurde in der jeweiligen Abteilung mit Gafchromic®-EBT Filmen durchgeführt. Die Dosisberechnungen wurden mittels Dosisdifferenz, Gammaanalyse sowie DVH-Statistik evaluiert.

Ergebnisse: Alle in den untersuchten Planungssystemen implementierten Dosisberechungsalgorithmen zeigten eine ähnliche Genauigkeit der Dosisberechnung im homogen weichteildichten Teil des Zielvolumens in der gemessenen Schicht.

Die Differenz zwischen der Berechnung und Messung betrug im größten Teil des Volumens±3% bis ca.±5%. PB überschätzte die Dosis im Lungenbereich um bis zu 23% im Gegenteil zu CC, der die Dosis um bis zu 6% unterschätzte.

Schlussfolgerung: Alle teilnehmenden Planungssysteme berechnen die Dosis im homogenen Bereich des ZV mit vergleichbarer Genauigkeit unabhängig vom implementierten Dosisberechnungsalgorithmus. CC berechnet die Dosis im Bereich des Elektronenungleichgewichtes an der Grenze zwischen Lunge und Weichgewebe genauer als PB, unterschätzt allerdings die absorbierte Dosis im Gegensatz zur Überschätzung durch PB.

Polster, J. M., M. Elgabaly, H. Lee, A. Klika, R. Drake, and W. Barsoum, "MRI and gross anatomy of the iliopsoas tendon complex.", Skeletal radiology, vol. 37, issue 1, pp. 55-8, 2008 Jan. Abstract

OBJECTIVE: The objective was to explain the anatomic basis of a longitudinal cleft of increased signal in the iliopsoas tendon seen on hip MR arthrograms.

MATERIALS AND METHODS: A prospective review of 20 MR hip arthrograms was performed using standard and fat-suppressed T1-weighted images to establish whether or not the cleft was composed of fatty tissue and to define the anatomy of the iliopsoas tendon complex. Three cadaver dissections of the hip region were then performed for anatomic correlation.

RESULTS: Fourteen out of 20 MR hip arthrograms demonstrated a longitudinal cleft of increased T1 signal adjacent to the iliopsoas tendon, which suppressed on frequency selective fat-suppressed images, indicating fatty composition. Gross anatomic correlation demonstrated this fatty cleft to represent a fascial plane adjacent to the iliopsoas tendon, in one case separating the iliopsoas tendon medially from a thin intramuscular tendon within the lateral portion of the iliacus muscle. Also noted was a direct muscular insertion of the lateral portion of the iliacus muscle onto the anterior portion of the proximal femoral diaphysis in all 3 cadavers.

CONCLUSION: The anatomy of the iliopsoas tendon complex is more complicated than typically illustrated and includes the iliopsoas tendon itself attaching to the lesser trochanter, the lateral portion of the iliacus muscle attaching directly upon the anterior portion of the proximal femoral diaphysis, and a thin intramuscular tendon within this lateral iliacus muscle that is separated from the iliopsoas tendon by a cleft of fatty fascia that accounts for the MRI findings of a cleft of increased T1 signal.

Polychronopoulou, K., A. A. AlKhoori, A. M. Efstathiou, M. A. Jaoude, C. M. Damaskinos, M. A. Baker, A. Almutawa, D. H. Anjum, M. A. Vasiliades, A. Belabbes, et al., "Design aspects of doped CeO2 for low-temperature catalytic CO oxidation: transient kinetics and DFT approach", ACS applied materials & interfaces, vol. 13, no. 19: American Chemical Society, pp. 22391–22415, 2021. Abstract

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Polychronopoulou, K., A. F. Zedan, M. AlKetbi, S. Stephen, M. Ather, M. S. Katsiotis, J. Arvanitidis, D. Christofilos, A. F. Isakovic, and S. AlHassan, "Tailoring the efficiency of an active catalyst for CO abatement through oxidation reaction: The case study of samarium-doped ceria", Journal of environmental chemical engineering, vol. 6, no. 1: Elsevier, pp. 266–280, 2018. Abstract
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Polychronopoulou, K., A. A. AlKhoori, A. M. Efstathiou, M. A. Jaoude, C. M. Damaskinos, M. A. Baker, A. Almutawa, D. H. Anjum, M. A. Vasiliades, A. Belabbes, et al., "Design aspects of doped CeO2 for low-temperature catalytic CO oxidation: transient kinetics and DFT approach", ACS applied materials & interfaces, vol. 13, no. 19: American Chemical Society, pp. 22391–22415, 2021. Abstract
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Polychronopoulou, K., A. F. Zedan, M. AlKetbi, S. Stephen, M. Ather, M. S. Katsiotis, J. Arvanitidis, D. Christofilos, A. F. Isakovic, and S. AlHassan, "Tailoring the efficiency of an active catalyst for CO abatement through oxidation reaction: The case study of samarium-doped ceria", Journal of environmental chemical engineering, vol. 6, no. 1: Elsevier, pp. 266–280, 2018. Abstract

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Polychronopoulou, K., A. F. Zedan, M. S. Katsiotis, M. A. Baker, A. A. AlKhoori, S. Y. AlQaradawi, S. J. Hinder, and S. AlHassan, "Rapid microwave assisted sol-gel synthesis of CeO2 and CexSm1-xO2 nanoparticle catalysts for CO oxidation", Molecular Catalysis, vol. 428: Elsevier, pp. 41–55, 2017. Abstract

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Polychronopoulou, K., A. F. Zedan, M. S. Katsiotis, M. A. Baker, A. A. AlKhoori, S. Y. AlQaradawi, S. J. Hinder, and S. AlHassan, "Rapid microwave assisted sol-gel synthesis of CeO2 and CexSm1-xO2 nanoparticle catalysts for CO oxidation", Molecular Catalysis, vol. 428: Elsevier, pp. 41–55, 2017. Abstract
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