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  1. AU="Hofmann, Alexander"
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  1. Book ; Online ; E-Book: Fragility fractures of the pelvis

    Rommens, Pol M. / Hofmann, Alexander

    2017  

    Author's details Pol Maria Rommers, Alexander Hofmann, editors
    Subject code 610
    Language German
    Size 1 Online-Ressource (xiii, 323 Seiten), Illustrationen, Diagramme
    Publisher Springer
    Publishing place Cham
    Publishing country Switzerland
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019591722
    ISBN 978-3-319-66572-6 ; 9783319665702 ; 3-319-66572-3 ; 3319665707
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

    Full text online

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  2. Article ; Online: Controlling Spontaneous Orientation Polarization in Organic Semiconductors─The Case of Phosphine Oxides.

    Cakaj, Albin / Schmid, Markus / Hofmann, Alexander / Brütting, Wolfgang

    ACS applied materials & interfaces

    2023  Volume 15, Issue 47, Page(s) 54721–54731

    Abstract: Upon film growth by physical vapor deposition, the preferential orientation of polar organic molecules can result in a nonzero permanent dipole moment (PDM) alignment, causing a macroscopic film polarization. This effect, known as spontaneous orientation ...

    Abstract Upon film growth by physical vapor deposition, the preferential orientation of polar organic molecules can result in a nonzero permanent dipole moment (PDM) alignment, causing a macroscopic film polarization. This effect, known as spontaneous orientation polarization (SOP), was studied in the case of different phosphine oxides (POs). We investigate the control of SOP by molecular design and film-growth conditions. Our results show that using less polar POs with just one phosphor-oxygen bond yields an exceptionally high degree of SOP with the so-called giant surface potential (slope), reaching more than 150 mV nm
    Language English
    Publishing date 2023-11-16
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c13049
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Chemical recycling of PVC-containing plastic waste for recycling of critical metals

    Peer, Michael / Berninger, Burkhard / Hofmann, Alexander / Fehn, Thomas

    2024  

    Abstract: 83 ... 88 ... Chemical recycling of polyvinyl chloride containing plastic waste to recover critical metals is a promising way to solve two important problems (polyvinyl chloride disposal and critical metal recovery) in waste management and is being ... ...

    Abstract 83

    88

    Chemical recycling of polyvinyl chloride containing plastic waste to recover critical metals is a promising way to solve two important problems (polyvinyl chloride disposal and critical metal recovery) in waste management and is being transferred on a larger scale in the “CHM-Technology” project. Various polyvinyl chloride containing plastic wastes were pyrolyzed to generate a hydrogen chloride rich vapor. This hydrogen chloride rich vapor is used in a second step to chlorinate indium in liquid crystal displays. Indium chloride has a lower boiling point than indium-tin-oxide and evaporates. This is cooled down and generates a metal concentrate together with the decomposed volatile materials from liquid crystal displays. The chlorine content in the polyvinyl chloride containing plastic waste residues is reduced. The products solid, oil, hydrochloric acid and gas can be used for new products. For metal purification the metal concentrate is mixed with water, filtrated, distilled and an electrolysis is carried out to recover metallic indium. Nine waste containing PVC were used with significant differences: when more hydrochloric acid and less volatile organic fraction was produced, more indium was transferred to the metal concentrate. The best recovery of indium (78% purity after electrolysis) was 39 wt-% from LCD panels containing 83 mg In/kg.

    26
    Keywords Circular economy ; Chemical recycling ; Critical metals ; PVC-waste ; LED recycling ; LCD panels recycling
    Subject code 660
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Focus on fragility fractures of the pelvis.

    Rommens, Pol Maria / Hofmann, Alexander

    European journal of trauma and emergency surgery : official publication of the European Trauma Society

    2021  Volume 47, Issue 1, Page(s) 1–2

    MeSH term(s) Aged ; Aged, 80 and over ; Biomechanical Phenomena ; Bone Density ; Disease Progression ; Female ; Humans ; Male ; Osteoporotic Fractures/classification ; Osteoporotic Fractures/epidemiology ; Osteoporotic Fractures/physiopathology ; Osteoporotic Fractures/therapy ; Pelvic Bones/injuries ; Risk Factors
    Language English
    Publishing date 2021-03-06
    Publishing country Germany
    Document type Editorial ; Introductory Journal Article
    ZDB-ID 2275480-5
    ISSN 1863-9941 ; 1863-9933
    ISSN (online) 1863-9941
    ISSN 1863-9933
    DOI 10.1007/s00068-020-01550-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1221: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 607: Show issues

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  5. Article ; Online: The FFP-classification: From eminence to evidence.

    Rommens, Pol Maria / Hofmann, Alexander

    Injury

    2021  Volume 54 Suppl 3, Page(s) S10–S19

    Abstract: Fragility fractures of the pelvis (FFP) are a clinical entity with a rapidly growing incidence among elderly women. The characteristics of these fractures are different from those appearing after high-energy trauma. In 2013, the comprehensive FFP- ... ...

    Abstract Fragility fractures of the pelvis (FFP) are a clinical entity with a rapidly growing incidence among elderly women. The characteristics of these fractures are different from those appearing after high-energy trauma. In 2013, the comprehensive FFP-classification provided a new framework for analysis of these fractures. It is based on the estimation of loss of stability in the pelvic ring. It is connected with recommendations for surgical treatment, justified by the fact that higher instabilities will need surgical stabilization. Since it's appearance, we can observe an increasing clinical-scientific interest in FFP. Multiple publications use the FFP-classification studying the characteristics of fractures, choice of treatment and outcome. Other studies focus on minimal-invasive techniques for stabilization. The actual knowledge describes higher mortality rates as the reference population, lower mortality rates after operative treatment but for the price of surgery-related complications. Mobility, independency and quality of life are worse than before the fracture, independent of the FFP-classification and the type of treatment. The classification triggered a rapid increase of expertise. This publication gives a detailed overview on the evolution from eminence to evidence.
    MeSH term(s) Aged ; Female ; Humans ; Fracture Fixation, Internal/methods ; Fractures, Bone/surgery ; Osteoporotic Fractures/epidemiology ; Pelvic Bones/injuries ; Pelvis ; Quality of Life ; Retrospective Studies
    Language English
    Publishing date 2021-09-21
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 218778-4
    ISSN 1879-0267 ; 0020-1383
    ISSN (online) 1879-0267
    ISSN 0020-1383
    DOI 10.1016/j.injury.2021.09.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 778: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 10: Show issues

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  6. Article ; Online: Klassifikationen müssen angelernt werden.

    Rommens, Pol Maria / Hofmann, Alexander

    Der Unfallchirurg

    2021  Volume 124, Issue 7, Page(s) 583–586

    Title translation Classifications must be learned.
    Language German
    Publishing date 2021-06-18
    Publishing country Germany
    Document type Letter
    ZDB-ID 605965-x
    ISSN 1433-044X ; 0177-5537
    ISSN (online) 1433-044X
    ISSN 0177-5537
    DOI 10.1007/s00113-021-01022-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Un I Zs.190: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  7. Book ; Thesis: Antacida und H2-Blocker

    Hofmann, Alexander

    Risikofaktoren der Reisediarrhoe?

    1993  

    Author's details Vorgelegt von Alexander Hofmann
    Language German
    Size 11 Bl., 4 S. : graph. Darst.
    Publishing country Switzerland
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Zürich, Univ., Diss., 1993
    HBZ-ID HT006323779
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    94 E 1311 order for loan Magazin

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  8. Book ; Online ; Thesis: Biochemische Charakterisierung der Komponenten des ERECTA-Signalweges

    Hofmann, Alexander [Verfasser]

    2019  

    Author's details Alexander Hofmann
    Keywords Pflanzen (Botanik) ; Plants (Botany)
    Subject code sg580
    Language German
    Publisher Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf
    Publishing place Düsseldorf
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  9. Article ; Online: Lab-scale and full-scale industrial composting of biodegradable plastic blends for packaging.

    Chong, Zhi Kai / Hofmann, Alexander / Haye, Marie / Wilson, Sharon / Sohoo, Ihsanullah / Alassali, Ayah / Kuchta, Kerstin

    Open research Europe

    2024  Volume 2, Page(s) 101

    Abstract: Background: The acceptance of compostable plastic packaging in industrial composting plants is not universal despite available certification due to the persistence of plastic residues after composting. To better understand this discrepancy, this study ... ...

    Abstract Background: The acceptance of compostable plastic packaging in industrial composting plants is not universal despite available certification due to the persistence of plastic residues after composting. To better understand this discrepancy, this study compared the disintegration rates of two blends designed for rigid packaging (polylactic acid based) and soft packaging (polybutylene succinate based) in lab-scale composting tests and in an industrial composting plant.
    Methods: A lab-scale composting test was conducted in triplicates according to ISO 20200 for 4, 8 and 12 weeks to check the disintegration potential of the blends. Duplicate test material were then exposed in the compost pile of an industrial composting plant for a duration of 3 weeks and compared with a supplementary lab-scale test of the same duration.
    Results: The rigid packaging samples (1 mm thickness) retained on average 76.4%, 59.0% and 55.7% of its mass after 4, 8 and 12 weeks respectively in the lab-scale. In the plant, the average remaining mass was 98.3%, much higher compared to the average of 68.9% after 3 weeks in the supplementary lab-scale test. The soft packaging samples (109±9 µm sample thickness) retained on average 45.4%, 10.9% and 0.3% of its mass after 4, 8 and 12 weeks respectively in the lab-scale. In the plant, a high average remaining mass was also observed (93.9%). The supplementary lab-scale test showed similar remaining mass but higher fragmentation after 3 weeks.
    Conclusions: The results show that the samples achieved significant disintegration in the lab-scale but not in the plant. The difference between the tests that might further contribute to the differing degradation rates is the composition and heterogeneity of the composting substrate. Therefore, the substrate composition and thermophilic composting duration of individual plants are important considerations to determine the suitability of treating compostable plastic in real-world conditions.
    Language English
    Publishing date 2024-01-22
    Publishing country Belgium
    Document type Journal Article
    ISSN 2732-5121
    ISSN (online) 2732-5121
    DOI 10.12688/openreseurope.14893.3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Online ; Thesis: Zellzyklusphasen spezifisches Auftreten von Cell-in-Cell Strukturen in adhäsiven Zellverbänden

    Hofmann, Alexander [Verfasser] / Distel, Luitpold [Akademischer Betreuer] / Distel, Luitpold [Gutachter]

    2022  

    Author's details Alexander Hofmann ; Gutachter: Luitpold Distel ; Betreuer: Luitpold Distel
    Keywords Medizin, Gesundheit ; Medicine, Health
    Subject code sg610
    Language German
    Publisher Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
    Publishing place Erlangen
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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