一、光纤通信的发展史与趋势 二、电磁波的波谱 三、光纤通信系统基本组成 四、光纤通信的特点

Dictionary A chemical-shift reference is used to define the (CH3)4SI positions of the resonances in the spectrum in terms of parts-per-million, or ppm, of frequency It is a material which is often directly added to the

3. 1 Chemical shift When an atom is placed in a magnetic field B its electrons circulate about the direction of the applied magnetic field. This circulation causes a small magnetic field at the nucleus which opposes the externally applied field The magnetic field at the nucleus(the effective field) is therefore generally less than the applied field by a fraction THNMR

A remarkab|efie|d e One of the two leading technologies in structural biolog y Great contributions to biology A special window to the development of modern structural biology and biophysics THNMR YAN

NMR supplement The second decade into the third millenium Kurt Wuthrich NMR spectroscopy is one of the principal experimental techniques of structural biology, with abilities to determine atomic resolution structures as well as investigate dynamics and intermolecular interactions of

MACINETIC RESONANCE ELSEVIER Progress in Nuclear Magnetic Resonance Spectroscopy 32(1998)287-387 The use of nmr methods for conformational studies of nucleic acids Sybren S. Wijmenga*, Bernd N M. van Buuren Umed University, Department of Medical Biochemistry and Biophysics, S 90187 Umed, Sweden

NMR spectroscopy in structure-based drug design Gordon CK Roberts NMR methods for the study of motion in proteins continue Structure and dynamics of the binding site improve, and a n d complexes Methodological developments in NMR of macromolecules relevant to drug design

NMR of drugs and ligands bound to receptors Anthony Watts NMR methods are now able to give detailed structural, dynamic of these still not identified or classed into families [4\]. and electronic information about drugs and ligands while

TSINGHUA SCIENCE AND TECHNOLOGY ssN100702142325pp43-445 Volume 5, Number 4, December 2000 Interaction of Divalent Metal lons with the Adenosine Triphosphate Measured using nuclear magnetic resonance

NMR supplement Hendrickson, W-A& Wuthrich, K Macromolecular 16. Leahy, D.J., Aukhil, I.& Erickson, H.P. 2.0 Cell 84 A K.D. thanks the Wellcome Trust and The queens 2D0i9 Riddiough. G. Nature Struct. Biol 18. sakaning. AK Kean. cel l8r.597-605i(eRw& by the Wellcome Trust. The authors acknowledge