spectra造句
1 focus, focuses/foci * formula, formulas/formulae * spectrum, spectrums/spectra.
2 This is more of a possibility in IR spectra.
3 The IR spectra are consistent with it being.
4 As agreement between calculated and experimental I-V spectra is good, this method is clearly viable for the analysis of experimental data.
5 Oxidative charge-transfer processes are observed in the spectra of complexes of low oxidation state metals with organic amines, such as.
6 Hundreds of asteroid spectra have been compared with laboratory reflection spectra of meteorites and pure mineral samples.
7 With Spectra or Dyneema, we have to adjust in the sleeving, and here a little extra care pays off dividends.
8 To assess this objectively, we fitted the power spectra to the following function where is the power spectral density at frequency.
9 The technique produces spectra which sometimes include several peaks for a single crystal.
10 Studies of the spectra of about fifty NEAs have given us some valuable clues to their nature and origin.
11 For more complex molecules in whose spectra vibrational detail is not resolved, assignments are difficult to make.
12 It is also possible to record vibrational spectra of solid samples under high and varying pressure.
13 Three small NEAs have spectra very similar to those of basaltic achondrites and of the asteroid Vesta.
14 We shall see, however, that electronic spectra rarely give us direct information about molecular structures.
15 In the face of these difficulties, it is remarkable that the spectra of some forty-five NEAs have been studied.
16 For example, the striking color of Prussian Blue is an indication that electronic spectra may have unusual features.
17 To the untrained eye, pretty pictures count for more than interesting spectra; neither are they without scientific interest.
18 More recently, the use of lasers to excite specific upper state levels has allowed emission spectra to be studied.
19 As well as the frequency spectrum, one can define wave number spectra - Fourier transforms of the space correlations.
20 The two measurements are necessary, since visual pigments are light sensitive and have characteristic absorption spectra under these different light conditions.
21 One additional device is a spectrometer to study the infrared spectra of strong point sources.
22 Finally, to summarise, this is a useful compilation of the Raman spectra of polymers, despite some shortcomings.
23 In the present epoch the systematic red shift of galactic spectra indicates that the Universe is expanding.
24 This is one sign of the richness of the electronic spectra of compounds containing transition metal centers.
25 Analogous distinctions between band envelopes may be made for Raman spectra of gaseous asymmetric tops, but they are not commonly used.
26 In the past, much of the work with flowing gases used photographic recording of electronic emission or absorption spectra.
27 But it can be a complicated matter to extract useful information from the observed spectra.
28 Strenuous efforts have been made to program such recognition abilities into microcomputers and several packages for manipulating and comparing spectra are available.
29 This approach, although still somewhat restrictive has led to reasonable predictions of relaxation and retardation spectra.
30 Such structural changes are of course accompanied by changes in vibrational spectra.
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