102,178 research outputs found
The role of organic aerosols in homogeneous ice formation
No full textKärcher B, Koop T. The role of organic aerosols in homogeneous ice formation. ATMOSPHERIC CHEMISTRY AND PHYSICS. 2005;5(3):703-714.Recent field observations suggest that the fraction of organic-containing aerosol particles in ice cloud particles is diminished when compared to the background aerosol prior to freezing. In this work, we use model calculations to investigate possible causes for the observed behavior. In particular, homogeneous freezing processes in cooling air parcels containing aqueous inorganic particles and organic particles are studied with a detailed microphysical model. A disparate water uptake and resulting size differences that occur between organic and inorganic particles prior to freezing are identified as the most likely reason for the poor partitioning of organic aerosols into the ice phase. The differences in water uptake can be caused by changes in the relationship between solute mass fraction and water activity of the supercooled liquid phase, by modifications of the accommodation coefficient for water molecules, or by a combination thereof. The behavior of peak ice saturation ratios and total ice crystal number concentrations is examined, and the dependence of the results on cooling rate is investigated. Finally, processes are discussed that could possibly modify the homogeneous freezing behavior of organic particles
'Snow joke as festive season gives rise to a blizzard of fake flakes
No full textKoop T. 'Snow joke as festive season gives rise to a blizzard of fake flakes. NATURE. 2009;462(7276):985
The seeds of ice in clouds
No full textKoop T. The seeds of ice in clouds. Nature. 2013;498(7454):302-302
Förderungsdiagnostik mit dem ElementarMathematischen BasisInterview (EMBI) im inklusiven Anfangsunterricht
No full textPeter-Koop A. Förderungsdiagnostik mit dem ElementarMathematischen BasisInterview (EMBI) im inklusiven Anfangsunterricht. In: Peter-Koop A, Rottmann T, Lüken M, eds. Inklusiver Mathematikunterricht in der Grundschule. Offenburg: Mildenberger; 2015: 156-167
Sprache im inklusiven Mathematikunterricht der Grundschule
No full textTiedemann K. Sprache im inklusiven Mathematikunterricht der Grundschule. In: Lüken M, Peter-Koop A, Rottmann T, eds. Inklusiver Mathematikunterricht in der Grundschule. Offenburg: Mildenberger; 2015: 107-121
Crystals creeping out of cracks
No full textKoop T. Crystals creeping out of cracks. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2017;114(5):797-799
Comparison of T Tube Ileostomy and Bishop Koop Ileostomy for the Management of Uncomplicated Meconium Ileus
No full textBackground: Meconium ileus is a common cause of neonatal intestinal obstruction. Various surgical procedures are in practice for uncomplicated meconium ileus. Bishop Koop ileostomy allows distal passage of gut content and uses the distal absorptive area. T tube ileostomy avoids the need for gut resection and formal closure of stoma. The aim of this prospective interventional study was to compare the outcome of T-tube ileostomy and Bishop Koop ileostomy for the treatment of uncomplicated meconium ileus.Materials and methods: It was a prospective interventional study from January 2015 to December 2016. Patients were randomly assigned to the T-tube ileostomy group (group A) and Bishop Koop ileostomy group (group B). The patients were followed up for 6 weeks post-operatively. Surgical outcomes between the two groups were compared.Results: The age range of the patients was 1 to 7 days; majority of the patients were males. Mean operation time of group A (60.76±5.81 minutes) and group B (87.05±6.49 minutes) showed significant difference (p =0.0001). After operation, mean time to start bowel movements in group A (4.90±1.41days) and group B (6.53±2.58 days) showed significant difference (p= 0.020). Times to establish oral feeding, irrigation tube removal and postoperative complications showed no significant difference. All patients that survived in the group B required formal stoma closure, while in the group A stomas closed spontaneously. One patient in the group A had intraperitoneal leakage leading to mortality after second operation. Four patients had leakage in the group B; 2 of them died.Conclusions: T-tube ileostomy was found as an effective and safe procedure for the management of uncomplicated meconium ileus.</jats:p
Pas-caart van 't Canaal, vertoonende in 't geheel Engelandt, Schotlandt, Yrlandt, en een gedeelte van Vranckrijck [cartographic material]. Nieuwlijcks uijtgegeven /
No full textFrom: De zee-atlas ofte water-waereld : vertoonende alle de zee-kusten van het bekende deel des aerd-bodems seer dienstigh voor alle schippers en stuurlieden ; mitsgaders koop-lieden om op 't kantoor gebruyckt te werden. Nieuwelijcks aldus uytgegeven / by Hendrick Doncker. Amsterdam : Hendrick Doncker, 1659.; Map of the British Isles, surrounding seas and northern France showing royal coat of arms for Ireland, Scotland, England and France. Also shows rhumb lines, sand bars and reefs. Relief shown by soundings for the English Channel and the Irish Sea.; Map oriented with north to right.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-ra10-s27
Impulse und Implikationen für Forschung und Praxis
No full textPeter-Koop A, Rottmann T. Impulse und Implikationen für Forschung und Praxis. In: Peter-Koop A, Rottmann T, Lüken M, eds. Inklusiver Mathematikunterricht in der Grundschule. Offenburg: Mildenberger; 2015: 211-215
Einsicht in Teil-Ganzes-Beziehungen. Übungen mit den “Zahlenfreunden”
No full textPeter-Koop A, Rottmann T. Einsicht in Teil-Ganzes-Beziehungen. Übungen mit den “Zahlenfreunden” . Fördermagazin Grundschule. 2013;35(4):21-25, 37-38
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