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3,202 results on '"Lutz, J"'

5. A paired-kidney allocation study found superior survival with HLA-DR compatible kidney transplants in the Eurotransplant Senior Program

Author

Tieken, I., Haasnoot, G., van Meel, M., Rump, L.C., Rosenkranz, A., Horn, S., Margreiter, R., Schneeberger, S., Oberbauer, R., Pohanka, E., Függer, F., Mühlbacher, F., Berlakovich, G., Meurisse, M., Weekers, L., Ysebaert, D., Wissing, K.M., Mikhalski, D., Mourad, M., van Biesen, W., Kuypers, D., Floege, J., Anthuber, M., Viebahn, R., Schenker, P., Budde, K., Pratschke, J., Zidek, W., Melchior, S., Woitas, R., Strassburg, C.H., Hugo, C., Wirth, M., Schiffer, M., Kribben, A., Pisarski, P., Fichtner-Feigl, S., Haubitz, M., Weimer, R., Weithofer, P., Fornara, P., Fisher, L., Sester, U., Zeier, M., Kliem, V., Klempnauer, l, Grimm, M.O., Kunzendorf, U., Stippel, D., Arns, W., Mönch, C., Nitschke, M., Bartels, M., Krämer, B., Kruger, B., Heemann, U., Werner, J., Hoyer, J., Wolters, H.H., Suwelack, B., Lutz, J., Banas, B., Hakenberg, O., Olbricht, C.J., Kalus, M., Schwenger, V., Nadalin, S., Schröppel, B., Lopau, K., Seelen, M.A.J., Berger, S.P., de Fijter, J.W., van der Linden, S.J., Christiaans, M.H.L., van de Wetering, J., van Zuilen, A.D., Bemelman, F., Nurmohamed, A., Hilbrands, L., de Fijter, Johan, Dreyer, Geertje, Mallat, Marko, Budde, Klemens, Pratschke, Johann, Klempnauer, Jürgen, Zeier, Martin, Arns, Wolfgang, Hugo, Christian, Rump, Lars-Christian, Hauser, Ingeborg, Schenker, Peter, Schiffer, Mario, Grimm, Marc-Oliver, Kliem, Volker, Olbricht, Christoph J., Pisarski, Przemyslaw, Banas, Bernhard, Suwelack, Barbara, Hakenberg, Oliver, Berlakovich, Gabriela, Schneeberger, Stefan, van de Wetering, Jacqueline, Berger, Stefan, Bemelman, Frederike, Kuypers, Dirk, Heidt, Sebastiaan, Rahmel, Axel, Claas, Frans, Peeters, Patrick, Oberbauer, Rainer, Heemann, Uwe, and Krämer, Bernhard K.

Published
2023
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6. The Hubble Space Telescope Advanced Camera for Surveys Emission Line Survey of Andromeda. I: Classical Be Stars

Author

Peters, M., Wisniewski, J. P., Williams, B. F., Lomax, J. R., Choi, Y., Durbin, M., Johnson, L. C., Lewis, A. R., Lutz, J., Sigut, T. A. A., Wallach, A., and Dalcanton, J. J.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We present results from a 2-epoch HST H$\alpha$ emission line survey of the Andromeda Galaxy that overlaps the footprint of the Panchromatic Hubble Andromeda Treasury (PHAT) survey. We find 552 (542) classical Be stars and 8429 (8556) normal B-type stars in epoch # 1 (epoch # 2), yielding an overall fractional Be content of 6.15% $\pm$0.26% (5.96% $\pm$0.25%). The fractional Be content decreased with spectral sub-type from $\sim$23.6% $\pm$2.0% ($\sim$23.9% $\pm$2.0%) for B0-type stars to $\sim$3.1% $\pm$0.34% ($\sim$3.4% $\pm$0.35%) for B8-type stars in epoch # 1 (epoch # 2). We observe a clear population of cluster Be stars at early fractional main sequence lifetimes, indicating that a subset of Be stars emerge onto the ZAMS as rapid rotators. Be stars are 2.8x rarer in M31 for the earliest sub-types compared to the SMC, confirming that the fractional Be content decreases in significantly more metal rich environments (like the Milky Way and M31). However, M31 does not follow a clear trend of Be fraction decreasing with metallicity compared to the Milky Way, which may reflect that the Be phenomenon is enhanced with evolutionary age. The rate of disk-loss or disk-regeneration episodes we observe, 22% $\pm$ 2% yr$^{-1}$, is similar to that observed for seven other Galactic clusters reported in the literature, assuming these latter transient fractions scale by a linear rate. The similar number of disk-loss events (57) as disk-renewal events (43) was unexpected since disk dissipation time-scales can be $\sim$2x the typical time-scales for disk build-up phases., Comment: Accepted to AJ

Published
2019
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13. Nickel-catalyzed enantioselective arylation of pyridine

Author

Lutz, J Patrick, Chau, Stephen T, and Doyle, Abigail G

Subjects
Chemical Sciences
Abstract

We report an enantioselective Ni-catalyzed cross coupling of arylzinc reagents with pyridiniumions formed in situ from pyridine and a chloroformate. This reaction provides enantioenriched 2-aryl-1,2-dihydropyridine products that can be elaborated to numerous piperidine derivatives with little or no loss in ee. This method is notable for its use of pyridine, a feedstock chemical, to build a versatile, chiral heterocycle in a single synthetic step.

Published
2016

18. Introducing Column Chromatography through Colorful Reactions of Guaiazulene

Author

Morgan, Paul M., Wilson, Anne M., and Lutz, J. Patrick

Abstract

We report two related experiments to introduce column chromatography in the context of a second-year organic chemistry lab course or an upper-division advanced organic chemistry lab course. Both experiments involve functionalization of guaiazulene via electrophilic aromatic substitution, and the highly colored starting material and products serve as clear visual indicators of reaction progress and of the purification. The longer version of the experiment scaffolds the chromatography process by guiding students to develop conditions to purify their own unique compound. The products are amenable to a wide variety of characterization techniques, including UV–visible absorbance spectroscopy and 2D NMR spectroscopy. These experiments are highly flexible and have been implemented in a second-year course as an activity taking a single lab period and in an upper-division course as an activity taking three full lab periods. As judged by the results and discussion from their lab reports, students in both classes were largely successful at meeting the learning objectives for these experiments, including monitoring reaction progress using thin-layer chromatography, separating compound mixtures using column chromatography, and assessing the success of a reaction based on experimental data.

Published
2024
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29. The STAR Silicon Strip Detector (SSD)

Author

Arnold, L., Baudot, J., Bonnet, D., Boucham, A., Bouvier, S., Castillo, J., Coffin, J. P., Drancourt, C., Erazmus, B., Gaudichet, L., Germain, M., Gojak, C., Grabski, J., Guilloux, G., Guedon, M., Hippolyte, B., Janik, M., Kisiel, A., Kuhn, C., Lakehal-Ayat, L., Lefevre, F., LeMoal, C., Leszczynski, P., Lutz, J. R., Maliszewski, A., Martin, L., Milletto, T., Pawlak, T., Peryt, W., Pluta, J., Przewlocki, M., Radomski, S., Ravel, O., Renard, C., Renault, G., Rigalleau, L. M., Roy, C., Roy, D., Suire, C., Szarwas, P., and Tarchini, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The STAR Silicon Strip Detector (SSD) completes the three layers of the Silicon Vertex Tracker (SVT) to make an inner tracking system located inside the Time Projection Chamber (TPC). This additional fourth layer provides two dimensional hit position and energy loss measurements for charged particles, improving the extrapolation of TPC tracks through SVT hits. To match the high multiplicity of central Au+Au collisions at RHIC the double sided silicon strip technology was chosen which makes the SSD a half million channels detector. Dedicated electronics have been designed for both readout and control. Also a novel technique of bonding, the Tape Automated Bonding (TAB), was used to fullfill the large number of bounds to be done. All aspects of the SSD are shortly described here and test performances of produced detection modules as well as simulated results on hit reconstruction are given., Comment: 11 pages, 8 figures, 1 table

Published
2002
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30. Is pretenure interdisciplinary research a career risk?

Author

Fischer, E. V, Mackey, K. R. M, Cusack, D. F, DeSantis, L. R. G, Hartzell-Nichols, L., Lutz, J. A, Melbourne-Thomas, J., Meyer, R., Riveros-Iregui, D. A, Sorte, C. J. B, Taylor, J. R, and White, S. A

Abstract

Despite initiatives to promote interdisciplinary research, early-career academics continue to perceive professional risks to working at the interface between traditional disciplines. Unexpectedly, the inherent practical challenges of interdisciplinary scholarship, such as new methodologies and lexicons, are not the chief source of the perceived risk. The perception of risk is pervasive across disciplines, and it persists despite efforts to support career development for individuals with common interests [Mitchell and Weiler, 2011]. Suggestions that interdisciplinary work can go unrewarded in academia [Clark et al., 2011] foster a concern that targeting interdisciplinary questions, such as those presented by climate change, will pose problems for acquiring and succeeding in a tenure-track position. If self-preservation limits the questions posed by early-career academics, a perceived career risk is as damaging as a real one to new transdisciplinary initiatives. Thus, institutions should address the source of this perception whether real or specious.

Published
2012

35. A paired-kidney allocation study found superior survival with HLA-DR compatible kidney transplants in the Eurotransplant Senior Program

Author

de Fijter, Johan, primary, Dreyer, Geertje, additional, Mallat, Marko, additional, Budde, Klemens, additional, Pratschke, Johann, additional, Klempnauer, Jürgen, additional, Zeier, Martin, additional, Arns, Wolfgang, additional, Hugo, Christian, additional, Rump, Lars-Christian, additional, Hauser, Ingeborg, additional, Schenker, Peter, additional, Schiffer, Mario, additional, Grimm, Marc-Oliver, additional, Kliem, Volker, additional, Olbricht, Christoph J., additional, Pisarski, Przemyslaw, additional, Banas, Bernhard, additional, Suwelack, Barbara, additional, Hakenberg, Oliver, additional, Berlakovich, Gabriela, additional, Schneeberger, Stefan, additional, van de Wetering, Jacqueline, additional, Berger, Stefan, additional, Bemelman, Frederike, additional, Kuypers, Dirk, additional, Heidt, Sebastiaan, additional, Rahmel, Axel, additional, Claas, Frans, additional, Peeters, Patrick, additional, Oberbauer, Rainer, additional, Heemann, Uwe, additional, Krämer, Bernhard K., additional, Tieken, I., additional, Haasnoot, G., additional, van Meel, M., additional, Rump, L.C., additional, Rosenkranz, A., additional, Horn, S., additional, Margreiter, R., additional, Schneeberger, S., additional, Oberbauer, R., additional, Pohanka, E., additional, Függer, F., additional, Mühlbacher, F., additional, Berlakovich, G., additional, Meurisse, M., additional, Weekers, L., additional, Ysebaert, D., additional, Wissing, K.M., additional, Mikhalski, D., additional, Mourad, M., additional, van Biesen, W., additional, Kuypers, D., additional, Floege, J., additional, Anthuber, M., additional, Viebahn, R., additional, Schenker, P., additional, Budde, K., additional, Pratschke, J., additional, Zidek, W., additional, Melchior, S., additional, Woitas, R., additional, Strassburg, C.H., additional, Hugo, C., additional, Wirth, M., additional, Schiffer, M., additional, Kribben, A., additional, Pisarski, P., additional, Fichtner-Feigl, S., additional, Haubitz, M., additional, Weimer, R., additional, Weithofer, P., additional, Fornara, P., additional, Fisher, L., additional, Sester, U., additional, Zeier, M., additional, Kliem, V., additional, Klempnauer, l, additional, Grimm, M.O., additional, Kunzendorf, U., additional, Stippel, D., additional, Arns, W., additional, Mönch, C., additional, Nitschke, M., additional, Bartels, M., additional, Krämer, B., additional, Kruger, B., additional, Heemann, U., additional, Werner, J., additional, Hoyer, J., additional, Wolters, H.H., additional, Suwelack, B., additional, Lutz, J., additional, Banas, B., additional, Hakenberg, O., additional, Olbricht, C.J., additional, Kalus, M., additional, Schwenger, V., additional, Nadalin, S., additional, Schröppel, B., additional, Lopau, K., additional, Seelen, M.A.J., additional, Berger, S.P., additional, de Fijter, J.W., additional, van der Linden, S.J., additional, Christiaans, M.H.L., additional, van de Wetering, J., additional, van Zuilen, A.D., additional, Bemelman, F., additional, Nurmohamed, A., additional, and Hilbrands, L., additional

Published
2023
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44. Direct oral anticoagulants in patients with chronic kidney disease: patient selection and special considerations

Author

Lutz J, Jurk K, and Schinzel H

Subjects
direct oral anticoagulants, chronic kidney disease, atrial fibrillation, glomerular Filtration rate, Vitamin k antagonists, Diseases of the genitourinary system. Urology, RC870-923
Abstract

Jens Lutz,1 Kerstin Jurk,2 Helmut Schinzel3 1Nephrology Department, I. Medizinische Klinik und Poliklinik, 2Center for Thrombosis and Hemostasis, Universitätsmedizin Mainz, 3Cardiopraxis Mainz, Gerinnungsambulanz, MED Facharztzentrum, Mainz, Germany Abstract: Many patients with chronic kidney disease (CKD) receive anticoagulation or antiplatelet therapy due to atrial fibrillation, coronary artery disease, thromboembolic disease, or peripheral artery disease. The treatment usually includes vitamin K antagonists (VKAs) and/or platelet aggregation inhibitors. The direct oral anticoagulants (DOAC) inhibiting factor Xa or thrombin represent an alternative for VKAs. In patients with acute and chronic kidney disease, caution is warranted, as DOACs can accumulate as they are partly eliminated by the kidneys. Thus, they can potentially increase the bleeding risk in patients with CKD. In patients with an estimated glomerular filtration rate (eGFR) above 60 mL/min, DOACs can be used safely with greater efficacy and safety as compared to VKAs. In patients with CKD 3, DOACs are as effective as VKAs with a lower bleeding rate. The more the renal function declines, the lower is the advantage of DOACs over VKAs. Thus, use of DOACs should be avoided in patients with an eGFR below 30 mL/min, particularly, the compounds with a high renal elimination. Available data suggest that DOACs can also be used safely in older patients. In this review, use of DOACs in comparison with VKAs, heparins, and heparinoids, together with special considerations in patients with impaired renal function will be discussed. Keywords: chronic renal disease, anticoagulation, renal function, vitamin K antagonists, bleeding, atrial fibrillation, dosing

Published
2017

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