166 research outputs found

    On spin-rotation contribution to nuclear spin conversion in C_{3v}-symmetry molecules. Application to CH_3F

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    The symmetrized contribution of E-type spin-rotation interaction to conversion between spin modifications of E- and A_1-types in molecules with C_{3v}-symmetry is considered. Using the high-J descending of collisional broadening for accidental rotational resonances between these spin modifications, it was possible to co-ordinate the theoretical description of the conversion with (updated) experimental data for two carbon-substituted isotopes of fluoromethane. As a result, both E-type spin-rotation constants are obtained. They are roughly one and a half times more than the corresponding constants for (deutero)methane.Comment: 13 pages with single-spacing, REVTeX, no figures, accepted for publication in <J. Phys. B

    The European Hematology Association Roadmap for European Hematology Research. A Consensus Document

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    Abstract The European Hematology Association (EHA) Roadmap for European Hematology Research highlights major achievements in diagnosis and treatment of blood disorders and identifies the greatest unmet clinical and scientific needs in those areas to enable better funded, more focused European hematology research. Initiated by the EHA, around 300 experts contributed to the consensus document, which will help European policy makers, research funders, research organizations, researchers, and patient groups make better informed decisions on hematology research. It also aims to raise public awareness of the burden of blood disorders on European society, which purely in economic terms is estimated at Euro 23 billion per year, a level of cost that is not matched in current European hematology research funding. In recent decades, hematology research has improved our fundamental understanding of the biology of blood disorders, and has improved diagnostics and treatments, sometimes in revolutionary ways. This progress highlights the potential of focused basic research programs such as this EHA Roadmap. The EHA Roadmap identifies nine sections in hematology: normal hematopoiesis, malignant lymphoid and myeloid diseases, anemias and related diseases, platelet disorders, blood coagulation and hemostatic disorders, transfusion medicine, infections in hematology, and hematopoietic stem cell transplantation. These sections span 60 smaller groups of diseases or disorders. The EHA Roadmap identifies priorities and needs across the field of hematology, including those to develop targeted therapies based on genomic profiling and chemical biology, to eradicate minimal residual malignant disease, and to develop cellular immunotherapies, combination treatments, gene therapies, hematopoietic stem cell treatments, and treatments that are better tolerated by elderly patients. Received December 15, 2015. Accepted January 27, 2016. Copyright © 2016, Ferrata Storti Foundatio

    F19F^{19} SPIN-ROTATION INTERACTION IN OF2OF_{2}{^{\ast}}

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    ^{\ast} Acknowledgement is made to the National Science Foundation for support of this research.Author Institution: Noyes Chemical Laboratory, University of IllinoisHalf-widths at half-height of 10-12 kc have been achieved in a high-resolution study of the spin-rotation multiplets in the microwave spectrum of OF2OF_{2}. Several transitions in the J = 9-14 region have been completely resolved yielding the diagonal elements of the spin-rotation interaction tensor. The values in kc along the principal inertial axes are Maa=385,Mbb=120M_{aa} =-385, M_{bb} =-120, and Mcc=83M_{cc} =-83. These values give the best fit of the experimental data assuming a rigid molecule. A complete analysis of the data acknowledging the vibration-rotation interactions is in progress. Various aspects of the spin-rotation interaction and its relation to the chemical shift and bonding properties of the molecule will be discussed
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