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  1. Article ; Online: NMR Study of CO

    Yang, Kaidi / Schell, Joseph / Gallazzi, Fabio / Wycoff, Wei / Glaser, Rainer

    Chemphyschem : a European journal of chemical physics and physical chemistry

    2023  Volume 24, Issue 11, Page(s) e202300053

    Abstract: We have been interested in the development of rubisco-based biomimetic systems for reversible ... ...

    Abstract We have been interested in the development of rubisco-based biomimetic systems for reversible CO
    Language English
    Publishing date 2023-04-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2025223-7
    ISSN 1439-7641 ; 1439-4235
    ISSN (online) 1439-7641
    ISSN 1439-4235
    DOI 10.1002/cphc.202300053
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  2. Article ; Online: Computational Investigation of the Thermochemistry of the CO

    Schell, Joseph / Yang, Kaidi / Glaser, Rainer

    The journal of physical chemistry. A

    2021  Volume 125, Issue 44, Page(s) 9578–9593

    Abstract: Rubisco is the enzyme responsible for ... ...

    Abstract Rubisco is the enzyme responsible for CO
    Language English
    Publishing date 2021-10-29
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.1c06294
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Video colorimetry of single-chromophore systems based on vector analysis in the 3D color space: Unexpected hysteresis loops in oscillating chemical reactions

    Schell, Joseph / McCauley, Sara C / Glaser, Rainer

    Talanta. 2020 Dec. 01, v. 220

    2020  

    Abstract: Colorimetry, the quantitative determination of color, usually of a digital image, has useful applications in diverse areas of research. Many methods have been proposed for translating the RGB data of an image to obtain concentration information. Among ... ...

    Abstract Colorimetry, the quantitative determination of color, usually of a digital image, has useful applications in diverse areas of research. Many methods have been proposed for translating the RGB data of an image to obtain concentration information. Among the many methods for RGB analysis, we focus on the vector projection method (VP), which is based on a vector analysis in 3D RGB color space. This method has the major advantages of being conceptually intelligible and generalizable to various systems. For solutions with variable concentrations of one chromophore, we will show that the analysis of the trace in RGB color space allows for a judgment about the reliability of the linear concentration dependence of the chromapostasi parameter. We discuss the theoretical underpinnings of the method in two test cases, a simple dye solution and a titration of an organic acid with phenolphthalein indicator. The VP method was then applied to the Ce-catalyzed Belousov-Zhabotinsky reaction with the expectation that the colorimetry would quantify [Ce⁴⁺] oscillations. Surprisingly, the 3D color space analysis revealed hysteresis loops and the origin and implications of this observation are discussed.
    Keywords catalytic activity ; cerium ; chemical reactions ; color ; colorimetry ; digital images ; dyes ; hysteresis ; phenolphthaleins ; quantitative analysis ; titration
    Language English
    Dates of publication 2020-1201
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2020.121303
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Video colorimetry of single-chromophore systems based on vector analysis in the 3D color space: Unexpected hysteresis loops in oscillating chemical reactions.

    Schell, Joseph / McCauley, Sara C / Glaser, Rainer

    Talanta

    2020  Volume 220, Page(s) 121303

    Abstract: Colorimetry, the quantitative determination of color, usually of a digital image, has useful applications in diverse areas of research. Many methods have been proposed for translating the RGB data of an image to obtain concentration information. Among ... ...

    Abstract Colorimetry, the quantitative determination of color, usually of a digital image, has useful applications in diverse areas of research. Many methods have been proposed for translating the RGB data of an image to obtain concentration information. Among the many methods for RGB analysis, we focus on the vector projection method (VP), which is based on a vector analysis in 3D RGB color space. This method has the major advantages of being conceptually intelligible and generalizable to various systems. For solutions with variable concentrations of one chromophore, we will show that the analysis of the trace in RGB color space allows for a judgment about the reliability of the linear concentration dependence of the chromapostasi parameter. We discuss the theoretical underpinnings of the method in two test cases, a simple dye solution and a titration of an organic acid with phenolphthalein indicator. The VP method was then applied to the Ce-catalyzed Belousov-Zhabotinsky reaction with the expectation that the colorimetry would quantify [Ce
    Language English
    Publishing date 2020-07-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2020.121303
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  5. Article: Manganese Superoxide Dismutase Acetylation and Regulation of Protein Structure in Breast Cancer Biology and Therapy.

    Ogle, Meredith M / Trevino, Rolando / Schell, Joseph / Varmazyad, Mahboubeh / Horikoshi, Nobuo / Gius, David

    Antioxidants (Basel, Switzerland)

    2022  Volume 11, Issue 4

    Abstract: The loss and/or dysregulation of several cellular and mitochondrial antioxidants' expression or enzymatic activity, which leads to the aberrant physiological function of these proteins, has been shown to result in oxidative damage to cellular ... ...

    Abstract The loss and/or dysregulation of several cellular and mitochondrial antioxidants' expression or enzymatic activity, which leads to the aberrant physiological function of these proteins, has been shown to result in oxidative damage to cellular macromolecules. In this regard, it has been surmised that the disruption of mitochondrial networks responsible for maintaining normal metabolism is an established hallmark of cancer and a novel mechanism of therapy resistance. This altered metabolism leads to aberrant accumulation of reactive oxygen species (ROS), which, under specific physiological conditions, leads to a potential tumor-permissive cellular environment. In this regard, it is becoming increasingly clear that the loss or disruption of mitochondrial oxidant scavenging enzymes may be, in specific tumors, either an early event in transformation or exhibit tumor-promoting properties. One example of such an antioxidant enzyme is manganese superoxide dismutase (MnSOD, also referred to as SOD2), which detoxifies superoxide, a ROS that has been shown, when its normal physiological levels are disrupted, to lead to oncogenicity and therapy resistance. Here, we will also discuss how the acetylation of MnSOD leads to a change in detoxification function that leads to a cellular environment permissive for the development of lineage plasticity-like properties that may be one mechanism leading to tumorigenic and therapy-resistant phenotypes.
    Language English
    Publishing date 2022-03-25
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox11040635
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book: Fachkunde für Vermessungstechniker

    Hagebusch, Alfred / Schell, Joseph

    1971  

    Author's details Alfred Hagebusch. Unt. Mitwirkg v. Joseph Schell
    Size 412 S. ; 4-o
    Edition [3. Aufl.]
    Publisher Rheinland-Verl
    Publishing place Düsseldorf
    Document type Book
    HBZ-ID HT008898374
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    4' II b, 18215 +3 order for loan Geschlossenes Magazin (U2)

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