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  1. Book ; Online: La santé pour tous dans une circonscription danoise / Claus Lundstedt, Kjeld Moller Pedersen, & Vagn Ry Nielsen

    Lundstedt, Claus / Pedersen, Kjeld Moller / Nielsen, Vagn Ry

    1987  

    Keywords Health for All ; Denmark ; Organization of Health Care and Social Development
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Hydrodynamics in early animal evolution.

    Nielsen, Claus

    Biological reviews of the Cambridge Philosophical Society

    2022  Volume 98, Issue 1, Page(s) 376–385

    Abstract: Choanoflagellates and sponges feed by filtering microscopic particles from water currents created by the flagella of microvillar collar complexes situated on the cell bodies of the solitary or colonial choanoflagellates and on the choanocytes in sponges. ...

    Abstract Choanoflagellates and sponges feed by filtering microscopic particles from water currents created by the flagella of microvillar collar complexes situated on the cell bodies of the solitary or colonial choanoflagellates and on the choanocytes in sponges. The filtering mechanism has been known for more than a century, but only recently has the filtering process been studied in detail and also modelled, so that a detailed picture of the water currents has been obtained. In the solitary and most of the colonial choanoflagellates, the water flows freely around the cells, but in some forms, the cells are arranged in an open meshwork through which the water can be pumped. In the sponges, the choanocytes are located in choanocyte chambers (or choanocyte areas) with separate incurrent and excurrent canals/pores located in a larger body, which enables a fixed pattern of water currents through the collar complexes. Previous theories for the origin of sponges show evolutionary stages with choanocyte chambers without any opening or with only one opening, which makes separation of incurrent and excurrent impossible, and such stages must have been unable to feed. Therefore a new theory is proposed, which shows a continuous evolutionary lineage in which all stages are able to feed by means of the collar complexes.
    MeSH term(s) Animals ; Hydrodynamics ; Water ; Porifera
    Chemical Substances Water (059QF0KO0R)
    Language English
    Publishing date 2022-10-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1423558-4
    ISSN 1469-185X ; 0006-3231 ; 1464-7931
    ISSN (online) 1469-185X
    ISSN 0006-3231 ; 1464-7931
    DOI 10.1111/brv.12909
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 71/734: Show issues

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  3. Book ; Online: Health for all in a Danish county / Claus Lundstedt, Kjeld Ml̮ler Pedersen, & Vagn Ry Nielsen

    Lundstedt, Claus / Pedersen, Kjeld Moller / Nielsen, Vagn Ry

    1987  

    Keywords Health for All ; Denmark ; Organization of Health Care and Social Development
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

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  4. Book ; Online: Salud para todos en un distrito danés / Claus Lundstedt, Kjeld Moller Pedersen y Vagn Ry Nielsen

    Lundstedt, Claus / Pedersen, Kjeld Moller / Nielsen, Vagn Ry

    1987  

    Keywords Health for All ; Denmark ; Organization of Health Care and Social Development
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

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  5. Article ; Online: Comment on "Theoretical study of the NO

    Nielsen, Claus Jørgen / Tang, Yizhen

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 5, Page(s) 4355–4356

    Abstract: This comment addresses a systematic error in the potential energy surfaces of the title reactions presented in the original article by ... ...

    Abstract This comment addresses a systematic error in the potential energy surfaces of the title reactions presented in the original article by Alkorta
    Language English
    Publishing date 2023-02-01
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp03013f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Navigating (un)certainty in 'downhill' trajectories: An ethnographic study about rehabilitees' and professionals' experiences of goal-setting in Parkinson's disease rehabilitation.

    Tonnesen, Merete / Nielsen, Claus V

    Clinical rehabilitation

    2023  Volume 37, Issue 10, Page(s) 1420–1434

    Abstract: Objective: To explore rehabilitees' and professionals' experiences of goal-setting in a context of (un)certainty with a progressive neurodegenerative disease and how they navigate this (un)certainty in Parkinson's disease rehabilitation.: Design: A ... ...

    Abstract Objective: To explore rehabilitees' and professionals' experiences of goal-setting in a context of (un)certainty with a progressive neurodegenerative disease and how they navigate this (un)certainty in Parkinson's disease rehabilitation.
    Design: A long-term multi-sited ethnographic fieldwork (2019-2020) following 20 rehabilitees and their goals over time and settings. Observation at 30 goal-setting meetings.
    Participants: Rehabilitees and professionals in Danish Parkinson's disease rehabilitation. Two randomly chosen groups of rehabilitees attending a Parkinson's disease course at a rehabilitation centre participated.
    Methods: Semi-structured interviews and participant observation.
    Results: Living with Parkinson's disease holds a certainty that the condition
    Conclusions: Rehabilitees and professionals found that setting goals in a condition that progresses is no easy task. They made use of strategies such as observation, repetition, future-proofing strategies, and attuning goals to navigate the (un)certainty. In goal-setting, to maintain functioning with progressive Parkinson's disease was a viable goal. Participants found they just do the best they can to navigate (un)certainty.
    MeSH term(s) Humans ; Parkinson Disease/rehabilitation ; Goals ; Neurodegenerative Diseases ; Rehabilitation Centers ; Anthropology, Cultural
    Language English
    Publishing date 2023-04-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 639276-3
    ISSN 1477-0873 ; 0269-2155
    ISSN (online) 1477-0873
    ISSN 0269-2155
    DOI 10.1177/02692155231170690
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2297: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article ; Online: The causal effect of early retirement on medication use across sex and occupation: evidence from Danish administrative data.

    Cremers, Jolien / Nielsen, Torben Heien / Ekstrøm, Claus Thorn

    The European journal of health economics : HEPAC : health economics in prevention and care

    2024  

    Abstract: We examine the causal effect of early retirement on medication use using Danish registry data. A reform in early retirement schemes in 2006 gradually increased eligibility ages from 60 to 64 differentially across birth cohorts. This enables an ... ...

    Abstract We examine the causal effect of early retirement on medication use using Danish registry data. A reform in early retirement schemes in 2006 gradually increased eligibility ages from 60 to 64 differentially across birth cohorts. This enables an instrumental variable design that was applied using novel g-estimation methods that alleviate bias in binary outcome IV models. Our data allow studying patterns in the short run (ages 59½-60½) and in the long run (ages 57-63). For those who were eligible already at age 60, retirement did not change overall medication use. However, when investigating medication and population subgroups, we see that painkiller use decreases and hypertension medication as well as mental health medication use increase after retirement in almost all population subgroups. Moreover, males as well as the blue-collar occupation subgroups do show decreases in overall medication use after early retirement. In conclusion, our analyses reveal that retirement can have important heterogeneous health effects across population groups and are potentially informative about the welfare benefits of social insurance more broadly.
    Language English
    Publishing date 2024-03-13
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2045253-6
    ISSN 1618-7601 ; 1618-7598
    ISSN (online) 1618-7601
    ISSN 1618-7598
    DOI 10.1007/s10198-023-01660-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 5475: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  8. Article: Early animal evolution: a morphologist's view.

    Nielsen, Claus

    Royal Society open science

    2019  Volume 6, Issue 7, Page(s) 190638

    Abstract: Two hypotheses for the early radiation of the metazoans are vividly discussed in recent phylogenomic studies, the 'Porifera-first' hypothesis, which places the poriferans as the sister group of all other metazoans, and the 'Ctenophora-first' hypothesis, ... ...

    Abstract Two hypotheses for the early radiation of the metazoans are vividly discussed in recent phylogenomic studies, the 'Porifera-first' hypothesis, which places the poriferans as the sister group of all other metazoans, and the 'Ctenophora-first' hypothesis, which places the ctenophores as the sister group to all other metazoans. It has been suggested that an analysis of morphological characters (including specific molecules) could throw additional light on the controversy, and this is the aim of this paper. Both hypotheses imply independent evolution of nervous systems in Planulozoa and Ctenophora. The Porifera-first hypothesis implies no homoplasies or losses of major characters. The Ctenophora-first hypothesis shows no important synapomorphies of Porifera, Planulozoa and Placozoa. It implies either independent evolution, in Planulozoa and Ctenophora, of a new digestive system with a gut with extracellular digestion, which enables feeding on larger organisms, or the subsequent loss of this new gut in the Poriferans (and the re-evolution of the collar complex). The major losses implied in the Ctenophora-first theory show absolutely no adaptational advantages. Thus, morphology gives very strong support for the Porifera-first hypothesis.
    Language English
    Publishing date 2019-07-31
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2787755-3
    ISSN 2054-5703
    ISSN 2054-5703
    DOI 10.1098/rsos.190638
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Early animal evolution

    Claus Nielsen

    Royal Society Open Science, Vol 6, Iss

    a morphologist's view

    2019  Volume 7

    Abstract: Two hypotheses for the early radiation of the metazoans are vividly discussed in recent phylogenomic studies, the ‘Porifera-first’ hypothesis, which places the poriferans as the sister group of all other metazoans, and the ‘Ctenophora-first’ hypothesis, ... ...

    Abstract Two hypotheses for the early radiation of the metazoans are vividly discussed in recent phylogenomic studies, the ‘Porifera-first’ hypothesis, which places the poriferans as the sister group of all other metazoans, and the ‘Ctenophora-first’ hypothesis, which places the ctenophores as the sister group to all other metazoans. It has been suggested that an analysis of morphological characters (including specific molecules) could throw additional light on the controversy, and this is the aim of this paper. Both hypotheses imply independent evolution of nervous systems in Planulozoa and Ctenophora. The Porifera-first hypothesis implies no homoplasies or losses of major characters. The Ctenophora-first hypothesis shows no important synapomorphies of Porifera, Planulozoa and Placozoa. It implies either independent evolution, in Planulozoa and Ctenophora, of a new digestive system with a gut with extracellular digestion, which enables feeding on larger organisms, or the subsequent loss of this new gut in the Poriferans (and the re-evolution of the collar complex). The major losses implied in the Ctenophora-first theory show absolutely no adaptational advantages. Thus, morphology gives very strong support for the Porifera-first hypothesis.
    Keywords animalia ; morphology ; ultrastructure ; large molecules ; Science ; Q
    Language English
    Publishing date 2019-07-01T00:00:00Z
    Publisher The Royal Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Was the ancestral panarthropod mouth ventral or terminal?

    Nielsen, Claus

    Arthropod structure & development

    2018  Volume 49, Page(s) 152–154

    Abstract: It has recently been suggested that the panarthropod mouth was ancestrally terminal, based on the assumption that the ancestral tardigrade had a terminal mouth and on the observations of a terminal mouth in adults of some stem-group fossils. This is ... ...

    Abstract It has recently been suggested that the panarthropod mouth was ancestrally terminal, based on the assumption that the ancestral tardigrade had a terminal mouth and on the observations of a terminal mouth in adults of some stem-group fossils. This is shown to be unlikely, and it is concluded that the ancestral panarthropod had a ventral mouth.
    MeSH term(s) Animals ; Arthropods/anatomy & histology ; Fossils/anatomy & histology ; Mouth/anatomy & histology ; Phylogeny ; Tardigrada/anatomy & histology
    Language English
    Publishing date 2018-11-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2001498-3
    ISSN 1873-5495 ; 1467-8039
    ISSN (online) 1873-5495
    ISSN 1467-8039
    DOI 10.1016/j.asd.2018.11.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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