Spectrum, Color Plate

The first 125 ml of eluent contained no alkaloids, but the next 150 ml yielded a crude alkaloid (115 mg). This alkaloid was crystallize from alcohol to yield 59 mg of slightly colored plates, mp 113-115. Subsequent recrystallizations raised the melting point to 121-122° (pale-yellow plates). The mass spectrum exhibited a parent ion at m/z 353. The UV spectrum showed maxima at 260 and 332 nm,... 

FIGURE 5.16 Mass spectrometry data and the corresponding mass spectrum of a selected spot. Figure courtesy of Kroungold Analytical (2007). (See color plate.)... 

Figure 5 FTIR transmission image of a PA/PTFE blend (left) and SEM image from the same area (right). PTFE distribution was calculated from the 1,210 cm 1 C-F absorption (intensity cf. color scale in the middle). The arrow indicates from where on the image the IR spectrum was extracted. The orange ovals show identical PTFE clusters as detected by FTIR and SEM, respectively. (See Color Plate Section at the end of this book.)...

Figure 4.7 Average modified final decoherence rate R(T), normalized with respect to the unmodulated rate as a function of energy constraint. DD-dash, cyan. Optimal modulation-solid, dark green. Insets optimal modulation Q(t) for different energy constraints, (a) Single-peak resonant dephasing spectrum (inset E = 20). (b) Single-peak off-resonant spectrum (inset E = 50). (c) 1 // spectrum (inset E = 30). (d) Multipeaked spectrum (inset E = 30). (See color plate section for the color representation of this figure.)...

Color Plate 15a shows the spectrum of white light and the spectra of three different colored solutions. You can see that potassium dichromate, which appears orange or yellow, absorbs blue wavelengths. Bromophenol blue absorbs orange wavelengths and appears blue to our eyes. Phenolphthalein absorbs the center of the visible spectrum. For comparison, spectra of these three solutions recorded with a spectrophotometer are shown in Color Plate 15b. 

Color Plate 13 Grating Dispersion (Section 18-2) Visible spectrum produced by a grating inside a spectrophotometer. 

Figure 11.26. Distribution of components indicated in Figure 11.25 overlaid on the video image. Each color represents the contribution of a particular component to the Raman spectrum observed at each position of a 28 x 28 grid. Obtained with a Dilor XY imaging spectrometer. (See color plates.)...

Contents Theory of Electrons in Polar Fluids. Metal-Ammonia Solutions The Dilute Region. Metal Solutions in Amines and Ethers. Ultrafast Optical Processes. Metal-Ammonia Solutions Transition Range. The Electronic Structures of Disordered Materials. Concentrated M-NH3 Solutions A Review. Strange Magnetic Behavior and Phase Relations of Metal-Ammonia Compounds. Metallic Vapors. Mobility Studies of Excess Electrons in Nonpolar Hydrocarbons. Optical Absorption Spectrum of the Solvated Electron in Ethers and Binary Liquid Systems. Subject Index. Color Plates. 

Figure 24F-1 The solar spectrum. The dark vertical lines are the Fraunhofer lines. See color plate 18 for a full-color version of the spectnim. Images created by Dr. Donald Mickey, University of Hawaii Institute for Astronomy, from National Solar Observatory spectral data. NSOS/Kitt Peak FTS data used here were produced by NSF/NOAO.

Color plate 1 6 Spectrum of white light and emission spectra of selected elements (see Chapter 28). 

Color plate 1 7 The solar spectrum, (a) Expanded color version of the solar spectrum shown in black and white in Feature 24-1 (Figure 24F-1). The huge number of dark absorption lines are produced by all of the elements in the sun. See if you can spot some prominent lines like the famous sodium doublet. 

FIGURE 7.13 Parameterized energy spectrum of the Baltic Sea for significant wave heights of 2, 3, 4, 5 and 6 m. (See color plate)... 

Figure 1-5. Chasmolith in feldspar, Lake Hoare, Antarctica with the Raman spectrum of calcite, quartz and feldspar from the cyanobacterial colonisation zone (see color plate section)...

Figure 1-13. Saida Golu Lake, Turkey hydromagnesite colonised stromatolites in a saltern. The FT-Raman spectrum of the cyanobacterial colonised zone in a stromatoUte is shown (see color plate section)...

Figure 15.3 Pressure sign

FIGURE 8.19 Proportion of compounds sampled by the GAO algorithm (blue) compared to the fiiU dataset (red), binned by the primary assay. It can be seen that the algorithm samples eompounds fiom aU parts of the activity spectrum, but is very efficient at sampling the most potent compounds. Reprinted with permission from Pickett et al. [40], 2011 American Chemical Society. For color details, please see color plate section. 

COLOR PLATE 15 Absorption Spectra and Color (Ask Yourself 18-B) (a) Flasks contain suspensions of silver nanoparticles whose color depends on the size and shape of the particles, which are approximately triangular plates with edge lengths of -50-100 nm. (b) The visible absorption spectrum of each suspension is shown in the graph. Stable suspensions of nanoparticles are called colloids (Demonstration 7-1). From D. M. Ledwith, A. M. Whelan, and J. M. Kelly,/. Mater. Chem. 2007,17,2459. Courtesy . M. Kelly and D. Ledwith, Trinity College, University of Dublin.]... 

COLOR PLATE 17 Grating Dispersion (Section 19-1) Visible spectrum produced by grating inside spectrophotometer. 

Figure 14.12 PL spectrum of (a) sample A the crosses indicate emissions from and (b) sample B acquired at RT. (c) CIE samples with designed mask patterns. See chromaticity diagram where the open circles text for more details. Variation of PL spectra indicate the emissions from samples A due to mask geometries for (d) sample A (Figure 14.12a) and B (Figure 14.12b), while and (e) sample B (cf Color Plate XXXVIII).

Figure 36 Calculated and measured IINS spectra of p-Hi (left) and 0-H2 (right) in the small cage of S-II tetrahydrofuran clathrate hydrate. The top figures show the stick spectrum, while the one convolved with the instrumental resolution function is in the bottom figures. Reprinted figure with permission from M. Xu, L. Ulivi, M. Celli, D. Colognesi and Z. Bacci, Phys. Reu By 83, 241403 (2011). Copyright 2011 American Physical Society. (For a color version of this figure, please see plate 15 in color plate section.)...

Fraction 4 (P.E./CHjClj, 1 1) was a bright red solution the T1 NMR spectrum of which indicated a mixture of two acetylenic constituents (A and B) which were separated by preparative TLC on 1 mm silica gel plates. The red band (A), when left in soln for 15 hr at r.t., lost its color. The Tl NMR spectrum of the decolored soln was identical with the spectrum of compound B. Comparison of the physical data (1H NMR and MS) of the two compounds with the spectral data reported for the dithiophene (A) (10) and the thiophene (B)... 

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