Recognition markers

Grade detection (ownership materials recognition, markers)... 

Numerous studies carried out in the last decade on fresh, artificially and naturally aged resins and varnishes have demonstrated that by means of THM-GC/MS a number of di- and triterperpenoids can by identified and, among them, the marker compounds that can be unequivocally used for resin recognition in real pictorial samples. 

The design of such cytotoxic antibodies is conceptually simple attach a toxic substance or a mediator of toxicity to the appropriate monoclonal and you have a magic bullet that can find and eliminate the one-in-a-billion cells that have the requisite marker (Figure 21.1). The antibody provides the recognition and binding capacity, while the associated toxic component effects cellular alterations leading to cell death (Pastan et al., 2006). 

Dixon, S.J., Xu, Y., Brereton, R.G., Soini, H.A., Novotny, M.V., Oberzaucher, E., Grammer, K. and Penn, DJ. (2007) Pattern recognition of gas chromatography mass spectrometry of human volatiles in sweat to distinguish the sex of subjects and determine potential markers. Chemometrics Intell. Lab. Systems. In press. 

The paper contains several innovations in the interpretation of polarographic reduction potentials, Eyi. One is the recognition that the Eyi obtained in the presence of base-electrolytes is not that of an isolated, solvent-solvated cation, but of one which is part of an ion-pair or of a higher aggregate. A practically useful innovation is to use the Em of the triphenylmethylium ion as the zero of the potential scale in all solvents. By means of this device one can compare a wide range of Ey2 differences in different solvents, and it is especially useful because that ion is stable in strongly acidic media in which the commonly used marker ferrocene decomposes. 

Wang, D., Liu, S., Trummer, B.J., Deng, C., and Wang, A., Carbohydrate microarrays for the recognition of cross-reactive molecular markers of microbes and host cells, Nat. Biotechnol20, 275-281, 2002. 

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