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Digitale Medien

Perivascular lymphoid tissue associated with the axillary lymph sinus and the lateral vein of Gehyra variegata (Reptilia: Gekkonidae) (1973)

Johnston, M. R. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 139 (1973), S. 431-437

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The axillary sinus of G. variegata is formed from a perivascular lymphatic which locally invests the lateral vein. Within the sinus the wall of the vein is distended by lymphoid tissue which is itself supported by reticular fibres. Lymphocytes, reticular cells, macrophages and mast cells occur in the tissue. The overall appearance of the structure is lymph node-like. Although Cardianema sp. (Nematoda:Filarioidea) parasitised the lymphatic system of some geckos examined, the non-pathologic origin of the lymphoid tissue is indicated by its presence in both axillae of infected and uninfected geckos alike. Comparison is made with lymph nodes and node-like structures in other vertebrates.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051390405

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Historians of geology in the field: a half-century of INHIGEO excursions (2016)

Johnston, M. R., Taylor, K. L.

Geological Society (of London)

In: Special Publications / Geological Society London

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Publikationsdatum: 2016-07-24

Beschreibung: When INHIGEO was born at Yerevan in 1967, it was agreed that field excursions would be an integral part of its activities. Although the bylaw that was adopted to this effect has since lapsed, the practice of combining meetings and excursions has continued. Meeting venues and the excursions associated with them are suggested by members in the host country and their organization is very much a local responsibility. Although the meetings commonly have a theme specific to them, the excursions may be more general depending on what can be achieved in the general vicinity of the venue and the interests and specializations of those running them. While it is accepted practice to visit geologically important sites, there is also a recognition that participants often appreciate the inclusion of localities or monuments of historical and cultural interest. This reflects the professional breadth of INHIGEO's membership (whose main disciplines span the geosciences as well as the history of science, in addition to some other fields) and also acknowledges the general understanding that geology, like every science, develops within the cultural milieus where it is practised. Excursions organized with specifically historical objectives respond to a variety of ideas about the goals of historical understanding, ranging along a scientific–historical spectrum. Excursions may be short, lasting from a few hours to a half or even a full day (these are frequently held during the course of the meeting); longer excursions may last up to a week or even more and are almost always scheduled either prior to or after the close of the meeting sessions. Whatever their duration, INHIGEO excursions have always proved to be educational and enlightening and are often among the most memorable of a meeting's experiences.

Print ISSN: 0305-8719

Digitale ISSN: 2041-4927

Thema: Geologie und Paläontologie

Publiziert von Geological Society (of London)

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