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Evaluation Strategies for Coupled GC-IMS Measurement including the Systematic Use of Parametrized ANN

Open Journal of Applied Sciences 2012年第4期2卷 257-266页

作者： Artur Scheinemann Stefanie Sielemann Jorg Walter theodor doll Gesellschaft für Analytische Sensorsysteme mbH G.A.S Dortmund Germany Institute of Physics Johannes Gutenberg-University Mainz Mainz Germany

Data evaluation strategies for the novel coupled MCC-IMS sensory system are developed. Mayor attention to the plausibility of applied procedures and the feasibility of automation was paid. Three stages of extraction levels with increasing data reduction are presented for several fields of application. According to suitable extraction levels, real data were tested on various structures of artificial neural networks (ANN) with the result, that the computational levels must still be chosen by expertise, but subsequent processing and training can be fully automated. For the training of larger net- works a method of automated generation of secondary training data is presented which exceeds the quality of previous noise models by far. It is concluded that the combination of MCC-IMS as measuring instrument and ANNs as evalua- tion technique have high potential for industrial use in process monitoring.

关键词： Gas Chromatography Ion Mobility Spectrometry GC-IMS MCC-IMS Artificial Neural Network Measurement Evaluation

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INORGANIC THIN-FILM SENSOR MEMBRANES WITH PLD-PREPARED CHALCOGENIDE GLASSES: CHALLENGES AND IMPLEMENTATION

INORGANIC THIN-FILM SENSOR MEMBRANES WITH PLD-PREPARED CHALC...

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第二届国际传感器科学研讨会

作者： Joachim P.KLOOCK Yulia G.MOURZINA Yuri ERMOLENKO theodor doll Jrgen SCHUBERT Michael J.SCHNING University of Applied Sciences Aachen （Division Jlich） Laboratory for Chemical Sensors and Biosensors52428 Jlich Germany Research Centre Jlich Institute of Thin Films and Interfaces52425 JlichGermany Research Centre Jlich Institute of Thin Films and Interfaces52425 JlichGermany St.Petersburg State University Faculty of Chemistry199034 St.PetersburgRussia St.Petersburg State University Faculty of Chemistry199034 St.PetersburgRussia Institute of Microtechnology Mainz 55129 MainzGermany Research Centre Jlich Institute of Thin Films and Interfaces52425 JlichGermany University of Applied Sciences Aachen （Division Jlich） Laboratory for Chemical Sensors and Biosensors52428 JlichGermany Research Centre JlichInstitute of Thin Films and Interfaces52425 JlichGermany

＜正＞ Intensive investigations in the field of ion-selective electrodes on the basis of chalcogenide glass materials are carried out during the last two decades. Different chalcogenide glasses for the detection of heavy metals in aqueous media were presented. The advantage of chalcogenide glasses are the high chemical stability of these vitreous materials in comparison to their crystalline counterpart [1-2]. For modem and miniaturised sensor devices, however, it is necessary to prepare the sensitive material in a fast and cost-effective way. This especially becomes very interesting in terms of multi-sensor systems for the simultaneous measurement of

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Tissue-specific signatures of metabolites and proteins in asparagus roots and exudates

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Horticulture Research 2021年第1期8卷 1044-1057页

作者： Stefanie doll Roxana Djalali Farahani-Kofoet Rita Zrenner Andrea Henze Katja Witzel Leibniz Institute of Plant Biochemistry Weinberg 306120 Halle/SaaleGermany Leibniz Institute of Vegetable and Ornamental Crops Theodor-Echtermeyer-Weg 114979 GroßbeerenGermany University of Potsdam Institute of Nutritional ScienceArthur-Scheunert-Allee 114-11614558 NuthetalGermany Present address:German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany

Comprehensive untargeted and targeted analysis of root exudate composition has advanced our understanding of rhizosphere ***,little is known about exudate spatial distribution and *** studied the specific metabolite signatures of asparagus root exudates,root outer(epidermis and exodermis),and root inner tissues(cortex and vasculature).The greatest differences were found between exudates and root *** total,263 non-redundant metabolites were identified as significantly differentially abundant between the three root fractions,with the majority being enriched in the root exudate and/or outer tissue and annotated as‘lipids and lipid-like molecules’or‘phenylpropanoids and polyketides’.Spatial distribution was verified for three selected compounds using MALDI-TOF mass spectrometry ***-specific proteome analysis related root tissue-specific metabolite distributions and rhizodeposition with underlying biosynthetic pathways and transport *** proteomes of root outer and inner tissues were spatially very distinct,in agreement with the fundamental differences between their functions and *** to KEGG pathway analysis,the outer tissue proteome was characterized by a high abundance of proteins related to‘lipid metabolism’,‘biosynthesis of other secondary metabolites’and‘transport and catabolism’,reflecting its main functions of providing a hydrophobic barrier,secreting secondary metabolites,and mediating water and nutrient *** more abundant in the inner tissue related to‘transcription’,‘translation’and‘folding,sorting and degradation’,in accord with the high activity of cortical and vasculature cell layers in growth-and development-related *** summary,asparagus root fractions accumulate specific *** expands our knowledge of tissue-specific plant cell function.

关键词： function outer signature

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