Spectrum application window

Fig. 4.2 ID WIN-NMR application window after program start, a) system menu button, b) MDI (Multi-Document-Interface) system menu button, c) button panel, d) title bar, e) menu bar, f) Spectrum window, g) button to iconize the window h) minimize/maximize button, i) close button.

When ID WIN-NMR or 2D WIN-NMR is first started, the appropriate maximized application or main display window ID WINNMR [Spectrum] and 2D WIN-NMR respectively appears on screen. Whereas 2D WIN-NMR has only one application window, ID WIN-NMR has three additional application windows. These four application windows (Spectrum, Preview, Relaxation and Text) may be displayed altogether (Multi Document Interface, MDI) on the screen by clicking the MDI window button, or may be displayed pairwise according to your needs by clicking one of the pairs offered in the Window pull-down menu. The active application window is indicated by the highlighted title bar (Fig. 4.3). 

Fig. 4.3 The ID WIN-NMR application window with its four MDI windows. AU the MDI windows have a) a system menu, b) a button to iconize the corresponding window c) a minimize/maximize button and d) a close button. The activated Spectrum window with the corresponding buttons in the button panel are shown.

Now choose the File Manager option in the ID WIN-NMR File pull-down menu which will show the 1D WIN-NMR application window and the WINDOWS file manager window in a dual display mode (Fig. 4.6). In the directory D NMRDATA GLUCOSE 1D H GH check that there is a new entry for the 1D proton spectrum stored above. 

With this dual display still on the screen select in the file manager window the ID carbon spectrum D NMRDATA GLUCOSE 1D C GC 001999.1R and use the drag and drop method to move it directly and most conveniently into the 1D WIN-NMR application window. 

A proper selection of this perameter is crucial for quality and quantity of analytical information available in derivative spectrum. Application of the broad derivatisation window gives a smooth averaged derivative spectrum without spectral details. So, the broad derivatisation window is recommended for derivatisation of a zero-order spectra with broad irregular bands with a significant oscillatory constituent [5]. In the case of the basic spectrum with narrow absorption bands the narrow derivatisation window should be used. Otherwise the important analytical information could be lost and resulted maxima of derivative spectrum couldn t correspend to the real one[5]. 

There are plastics that are transparent and translucent in the unpiginented state. They have a range of optical properties that make them interesting for a wide spectrum of optical applications that extends from windows to lens systems to sophisticated applications involving action via polarized light. Used for over a half century are aircraft canopies (thermoformed) and windows in many different structures. 

Usually, the FID is Fourier transformed after the application of an exponential window function (25). The line-broadening factor is selected to provide a good S/N. As a rule, the line broadening is selected according to the width of a narrow singlet resonance - in H NMR normally to a value from 0.1 to 0.5 Hz (cf. Figures 2 and 3). The resolution of the spectrum may be enhanced, though with reduced sensitivity, if the FID is multiplied, for example, by... 

The jump-return or 1, 1 method is a very simple and elegant solution because rather than destroying the water signal it simply does not excite water in the first place. We saw in Chapter 8, Figure 8.19 that a null in excitation occurs at the center of the spectral window, and this can be adjusted to put the water peak exactly on-resonance. A jump-return NOESY spectrum of a small protein will be shown later in this chapter. Jump-return and some more complicated variations ( 1,1 - echo and binomial ) are not applicable to all experiments, however, and require some careful tuning and adjustment to work well. They also distort the peak intensities throughout the spectrum and greatly reduce the intensities near the water resonance. 

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