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Levin P, Meunier V, Palzer S, Heinrich S. Influence of structure on freeze‐drying kinetics of instant coffee. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- P. Levin
- Hamburg University of Technology Institute of Solids Process Engineering and Particle Technology Denickestr. 15 21073 Hamburg Germany
| | - V. Meunier
- Nestlé S. A Nestlé Research Center Vers-Chez-Les-Blanc Route de Jorat 57 1000 Lausanne Switzerland
| | - S. Palzer
- Nestlé S. A Executive board Avenue Nestlé 55 1800 Vevey Switzerland
| | - S. Heinrich
- Hamburg University of Technology Institute of Solids Process Engineering and Particle Technology Denickestr. 15 21073 Hamburg Germany
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Kammerhofer J, Fries L, Dymala T, Dupas J, Forny L, Heinrich S, Palzer S. Penetration rates into heterogeneous model systems and soluble food material. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.08.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lügger S, Vieira J, Heinrich S, Palzer S. Lipid Migration through Semi-Solid Fat Suspensions. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kammerhofer J, Heinrich S, Fries L, Palzer S. Capillary Rise into Heterogeneous Pores: Impact of Surface Hydrophobicity. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Porowska A, Dosta M, Heinrich S, Gianfrancesco A, Fries L, Palzer S. Voraussage der Oberflächenzusammensetzung eines sprühgetrockneten Partikels durch Modellierung der Komponentenverteilung im Tropfen. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201450326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Reinke S, Heinrich S, Palzer S. Migration in Lebensmitteln mit mehreren Komponenten. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201450094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kneer J, Eberhardt A, Walden P, Ortiz Pérez A, Wöllenstein J, Palzer S. Apparatus to characterize gas sensor response under real-world conditions in the lab. Rev Sci Instrum 2014; 85:055006. [PMID: 24880407 DOI: 10.1063/1.4878717] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The use of semiconducting metal-oxide (MOX) based gas sensors in demanding applications such as climate and environmental research as well as industrial applications is currently hindered by their poor reproducibility, selectivity, and sensitivity. This is mainly due to the sensing mechanism which relies on the change of conductivity of the metal-oxide layer. To be of use for advanced applications metal-oxide (MOX) gas sensors need to be carefully prepared and characterized in laboratory environments prior to deployment. This paper describes the working principle, design, and use of a new apparatus that can emulate real-world conditions in the laboratory and characterize the MOX gas sensor signal in tailor-made atmospheres. In particular, this includes the control of trace gas concentrations and the control of oxygen and humidity levels which are important for the surface chemistry of metal-oxide based sensors. Furthermore, the sensor temperature can be precisely controlled, which is a key parameter of semiconducting, sensitive layers, and their response to particular gas compositions. The setup also allows to determine the power consumption of each device individually which may be used for performance benchmarking or monitoring changes of the temperature of the gas composition. Both, the working principle and the capabilities of the gas measurement chamber are presented in this paper employing tin dioxide (SnO2) based micro sensors as exemplary devices.
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Affiliation(s)
- J Kneer
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
| | - A Eberhardt
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
| | - P Walden
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
| | - A Ortiz Pérez
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
| | - J Wöllenstein
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
| | - S Palzer
- Department of Microsystems Engineering - IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
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Schumacher S, Nestler J, Otto T, Wegener M, Ehrentreich-Förster E, Michel D, Wunderlich K, Palzer S, Sohn K, Weber A, Burgard M, Grzesiak A, Teichert A, Brandenburg A, Koger B, Albers J, Nebling E, Bier FF. Highly-integrated lab-on-chip system for point-of-care multiparameter analysis. Lab Chip 2012; 12:464-73. [PMID: 22038328 DOI: 10.1039/c1lc20693a] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A novel innovative approach towards a marketable lab-on-chip system for point-of-care in vitro diagnostics is reported. In a consortium of seven Fraunhofer Institutes a lab-on-chip system called "Fraunhofer ivD-platform" has been established which opens up the possibility for an on-site analysis at low costs. The system features a high degree of modularity and integration. Modularity allows the adaption of common and established assay types of various formats. Integration lets the system move from the laboratory to the point-of-need. By making use of the microarray format the lab-on-chip system also addresses new trends in biomedicine. Research topics such as personalized medicine or companion diagnostics show that multiparameter analyses are an added value for diagnostics, therapy as well as therapy control. These goals are addressed with a low-cost and self-contained cartridge, since reagents, microfluidic actuators and various sensors are integrated within the cartridge. In combination with a fully automated instrumentation (read-out and processing unit) a diagnostic assay can be performed in about 15 min. Via a user-friendly interface the read-out unit itself performs the assay protocol, data acquisition and data analysis. So far, example assays for nucleic acids (detection of different pathogens) and protein markers (such as CRP and PSA) have been established using an electrochemical read-out based on redoxcycling or an optical read-out based on total internal reflectance fluorescence (TIRF). It could be shown that the assay performance within the cartridge is similar to that found for the same assay in a microtiter plate. Furthermore, recent developments are the integration of sample preparation and polymerase chain reaction (PCR) on-chip. Hence, the instrument is capable of providing heating-and-cooling cycles necessary for DNA-amplification. In addition to scientific aspects also the production of such a lab-on-chip system was part of the development since this heavily affects the success of a later market launch. In summary, the Fraunhofer ivD-platform covers the whole value chain ranging from microfluidics, material and polymer sciences, assay and sensor development to the production and assembly design. In this consortium the gap between diagnostic needs and available technologies can be closed.
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Affiliation(s)
- Soeren Schumacher
- Fraunhofer Institute for Biomedical Engineering IBMT, Am Mühlenberg 13, D-14476 Potsdam, Germany.
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Turchiuli C, Gianfrancesco A, Palzer S, Dumoulin E. Evolution of particle properties during spray drying in relation with stickiness and agglomeration control. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.08.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Robin F, Engmann J, Tomasi D, Breton O, Parker R, Schuchmann HP, Palzer S. Adjustable Twin-Slit Rheometer for Shear Viscosity Measurement of Extruded Complex Starchy Melts. Chem Eng Technol 2010. [DOI: 10.1002/ceat.201000151] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fries L, Antonyuk S, Heinrich S, Dubois C, Palzer S. Struktur und Festigkeit amorpher Wirbelschicht-Agglomerate. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201050101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Gianfrancesco A, Turchiuli C, Dumoulin E, Palzer S. Prediction of Powder Stickiness along Spray Drying Process in Relation to Agglomeration. Particulate Science and Technology 2009. [DOI: 10.1080/02726350903129987] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fries L, Antonyuk S, Heinrich S, Palzer S. Kollisionsverhalten dominant-plastischer Granulatpartikel. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Palzer S. Materialwissenschaftliche Analyse pharmazeutischer, chemischer und lebensmitteltechnologischer Pulver - Vergleichbarkeit verschiedener Pulversysteme und Vorhersage von deren Lager- und Agglomerationsverhalten. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Palzer S, Hartmann M. Unerwünschte Agglomerationseffekte bei der kontinuierlichen Wirbelschichttrocknung von Agglomeraten, welche amorphe Substanzen enthalten - Modellierung des Trocknungsverlaufes und Analyse der Haftmechanismen. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Palzer S, Sommer K. Caking von Lebensmittelpulvern und anderen organischen Produkten – Materialwissenschaftliche Aspekte, Berechnungsgrundlagen und Anwendungen. CHEM-ING-TECH 2007. [DOI: 10.1002/cite.200750389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Palzer S, Zürcher U. Kinetik unerwünschter Agglomerationsprozesse bei der Lagerung und Verarbeitung amorpher Lebensmittelpulver. CHEM-ING-TECH 2004. [DOI: 10.1002/cite.200407009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Palzer S, Hiebl C, Sommer K. Durchfeuchten von porösen Systemen mit nicht benetzenden Flüssigkeiten. CHEM-ING-TECH 2002. [DOI: 10.1002/1522-2640(200207)74:7<989::aid-cite989>3.0.co;2-h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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