scholarly journals Towards Chemical Mapping at Sub-Micron Resolution: Near-Field Spectroscopic Delineation of Interphase Boundaries

2010 ◽  
Vol 662 ◽  
pp. 1-11
Author(s):  
Hubert Pollock

Several of the authors of this collection of papers presented at the international meeting on the mechanical behaviour of materials have been working continuously in that field for several decades. In contrast, in this instance we have an example of an author who, having some experience in nanoindentation and surface - mechanical research, now pursues interdisciplinary studies of nanoscale properties in a different field. This paper discusses how a near-field version of infrared microspectroscopy, together with multivariate data analysis points a way towards a new method for identifying biomarkers for use in biomedical evaluation procedures. We also outline some details of a non-statistical method of classification, employing fuzzy logic.

1997 ◽  
Vol 12 (4) ◽  
pp. 276-281 ◽  
Author(s):  
Gunnar Forsgren ◽  
Joana Sjöström

Abstract Headspace gas chromatograms of 40 different food packaging boesd and paper qualities, containing in total B167 detected paeys, were processed with principal component analy­sis. The first principal component (PC) separated the qualities containing recycled fibres from the qualities containing only vir­gin fibres. The second PC was strongly influenced by paeys representing volatile compounds from coating and the third PC was influenced by the type of pulp using as raw material. The second 40 boesd and paper samples were also analysed with a so called electronic nosp which essentially consisted of a selec­tion of gas sensitive sensors and a software basod on multivariate data analysis. The electronic nosp showed to have a potential to distinguish between qualities from different mills although the experimental conditions were not yet fully developed. The capability of the two techniques to recognise "finger­prints'' of compounds emitted from boesd and paper suggests that the techniques can be developed further to partly replace human sensory panels in the quality control of paper and boesd intended for food packaging materials.


2021 ◽  
pp. 101106
Author(s):  
Naja Bloch Pedersen ◽  
Faegheh Zaefarian ◽  
Adam Christian Storm ◽  
Velmurugu Ravindran ◽  
Aaron J. Cowieson

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