Signal pattern

Figure 5.10 GALDI mass spectrum of rosin (colophony from THF solution). The typical signal pattern of diterpenoids is visible m/z 325 corresponds to isomeric diterpenoid acids, e.g.

Moreover, differentiation of the 38 segments of an SP-chip brought about by the temperature and membrane thickness gradient has proved to provide high quality gas discrimination power. An analysis of the signal patterns obtained for some gases present in the early stages of fires is shown in Fig. 3.30. Prior to the... 

Fig. 3.30 LDA analysis of signal patterns of typical fire gases. The data were obtained using a Sn02 microarray equipped with Si02...

Fig. 3.34 LDA of the microarray signal patterns obtained in practical KAMINA tests to detect gaseous precursors of smoldering fires through overheated cable insulation. Prior to the LDA the measured resistances of the sensor segments were normalized to the median of all sensor segments and the number of variables was reduced by a Principal Component Analysis (PCA) to cutback the noise. Clear distinction is achieved between clean air...

In order to investigate the discrimination power of the gradient microarray regarding the changes in air composition, a signal pattern analysis was performed... 

Fig. 3.36 LDA of the microarray signal patterns measured in a meeting room during night and day. The room temperature was about 22°C in all cases. Data were collected at two meetings a week apart and in the empty room with an isopropanol source at a distance of 0.8 m from KAMINA. The resistances of the sensor segments are normalized by reference and by median. Clearly the air of the empty room with closed and opened windows can be distinguished from the lower air...

Comparative sequence analysis based on MALDI-TOF-MS analysis of nucleic acids cleaved at specific bases and reference sequences used to construct in silico cleavage patterns enable cross-correlation of theoretical and experimental mass signal patterns. Observed signal pattern differences are indicators of sequence variations and... 

As mentioned above, the Pt(2.25+)4 species (B1 and B2) possesses one unpaired electron of Pt(III) (S = 1/2) and is the only species which exhibits paramagnetism among the four oxidation states. The ESR spectrum of the ce-pyridonate-blue species shown in Fig. 7 exhibits an axial signal characteristic of the platinum-blues (g = —2.4 and g = —2.0) (48, 49, 70, 96). Similar signal patterns are also observed for several other blue compounds (34, 47, 57, 86, 88, 89), and these common features show that the unpaired electron resides on the dz2 orbital located along the Pt chain. The g values observed for the para-... 

Signal Patterns in Proton Spectra of Skeletal Muscle 19... 

Quantification of lipids with irregular signal patterns in muscle spectra 33... 

SIGNAL PATTERNS IN PROTON SPECTRA OF SKELETAL MUSCLE... 

Fig. 14. Typical signals of triglycerides in a proton spectrum, (a) Structure of a triglyceride with three different fatty acids (one saturated, two unsaturated). Different positions of protons in the molecule are indicated, resulting in different chemical shifts in the spectrum, (b) Characteristic signal pattern of triglycerides (or fatty acids) in a spectrum from yellow fatty bone marrow of the tibia, containing triglycerides in the adipocytes with more than 90% volume fraction. The spectrum was recorded with TE = 50 ms by a PRESS sequence.

In Section 5.1 usual strategies to obtain reliable calibration by external and internal references are reported. Section 5.2 presents techniques for analysing overlapping resonance lines with symmetric and well-defined lineshapes. Section 5.3 shows a more suitable approach for differentiation of IMCL and EMCL in the complex signal patterns of lipids in muscle spectra. 

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