منابع مشابه
Intracardiac Injection of Radioactive Krypton
IN RECENT years the efforts of many groups have been directed to the development of more refined methods for the precise characterization of cardiac shunts. The application of inhaled foreign gases and the various extensions and improvements in the dye dilution method have already proved of considerable value in the study of patients with congenital heart disease.1 In the course of clinical stu...
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The volume of the intrafibrillar water space--i.e. the water contained inside the collagen fibres--is a key parameter that is relevant to concepts of connective tissue structure and function. Confined compression and swelling experiments on annulus fibrosus samples are interpreted in terms of a dual porosity model that distinguishes between a non-ionised intrafibrillar porosity and an ionised e...
متن کاملMAD phasing with krypton.
Experiments demonstrating the feasibility of Kr-edge MAD on frozen crystals as a routine method for structure determination are reported. Approximately 50% of protein crystals can be successfully derivatized by pressurization with the noble gases xenon or krypton. While Xe has produced many useful derivatives for MIR phasing over the last several years, the Xe edges (K edge = 34.6 keV, L(I) = 5...
متن کاملIonised carbon and galaxy activity
We investigate the possibility that the decrease in the relative luminosity of the 158 μm [C ii] line with the far-infrared luminosity in extragalactic sources is due to a larger contribution from the heated dust emission in the more distant sources. Due to the flux limited nature of these surveys, the luminosity of the detected objects increases with distance. However, the fact that the [C ii]...
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We present the results of new 3D TIGER spectroscopic observations and archived HST/WFPC2 and NICMOS images of the central region of M 104. The [N ii]+Hα images reveal the presence of a nuclear spiral structure, and the gaseous kinematics in the central arc-second shows evidence for kinematical decoupling of the central peak. A straight nuclear dust lane, with a weak symmetric counterpart, is se...
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ژورنال
عنوان ژورنال: Nature
سال: 1930
ISSN: 0028-0836,1476-4687
DOI: 10.1038/125204d0