83 research outputs found

    Ueber die Fortpflanzung der Diplopoden (Chilognathen)

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    WĂ€hrend ĂŒber die Entwickelungsgeschichte der Crustaceen und Insecten schon eine ansehnliche Literatur vorhanden ist und bestĂ€ndig nene Arbeiten erscheinen, haben sich nur sehr wenige Autoren (vorzĂŒglich NEWPORT, METSCHNIKOW und in letzter Zeit HEATHCOTE) mit der Embryologie der Myriapoden beschĂ€ftigt. Diese relative VernachlĂ€ssigung dĂŒrfte zum Theil in der ungenĂŒgenden Kenntniss der Biologie der TausendfĂŒssler eine ErklĂ€rung finden, da ohne genaiie Eenntniss der Lebensgewohnheiten dieser Thiere zur Zeit der Fortpflanzung die Beschaffung der Eier (und vor allem der frisch befruchteten) so gut wie unmöglich ist. Manche der diesbezĂŒglichen Angaben der Literatur sind ungenau oder geradezu falsch, und viele richtige und schĂ€tzenswerthe Angaben Ă€lterer Autoren, von denen ich STEIN, NEWPORT, GERVAIS und besonders FABRE hervorheben will, sind nahezu in Vergessenheit gerathen. Der Zweck dieser Arbeit geht dahin, eine zusammenhĂ€ngende Reihe von eigenen sorgfĂ€ltigen Untersuchungen ĂŒber die Biologie,insbesondere die Fortpflanzung der einheimischen Diplopoden bekannt zu geben. Dem biologischen Theil will ich eine kurze allgemeine anatomische Beschreibung des Geschlechtsapparates der Diplopoden voranschicken, und bei der Besprechung der einzelnen Familien werde ich auf den Bau des Geschlechtsapparates etwas nĂ€her eingehen. ..

    Recommendations for the management of the haematological and onco-haematological aspects of Gaucher disease1

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    Current knowledge of the haematological and onco-haematological complications of type 1 Gaucher disease has been reviewed with the aim of identifying best clinical practice for treatment and disease management. It was concluded that: (i) Awareness of typical patterns of cytopenia can help clinicians distinguish haematological co-morbidities. (ii) Red blood cell studies and complete iron metabolism evaluation at baseline are recommended. (iii) Haemoglobin levels defining anaemia should be raised and used in Gaucher disease treatment and monitoring. (iv) Surgeons should be aware of potential bleeding complications during surgery in Gaucher patients. The higher incidence of multiple myeloma in Gaucher disease suggests that Gaucher patients should have their immunoglobulin profile determined at diagnosis and monitored every 2 years (patients <50 years) or every year (patients >50 years). If monoclonal gammopathy of undetermined significance (MGUS) is found, general MGUS guidelines should be followed. Future studies should focus on the utility of early treatment to prevent immunoglobulin abnormalities and multiple myeloma

    Magnesia-Based Cements: A Journey of 150 Years, and Cements for the Future?

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    This review examines the detailed chemical insights that have been generated through 150 years of work worldwide on magnesium-based inorganic cements, with a focus on both scientific and patent literature. Magnesium carbonate, phosphate, silicate-hydrate, and oxysalt (both chloride and sulfate) cements are all assessed. Many such cements are ideally suited to specialist applications in precast construction, road repair, and other fields including nuclear waste immobilization. The majority of MgO-based cements are more costly to produce than Portland cement because of the relatively high cost of reactive sources of MgO and do not have a sufficiently high internal pH to passivate mild steel reinforcing bars. This precludes MgO-based cements from providing a large-scale replacement for Portland cement in the production of steel-reinforced concretes for civil engineering applications, despite the potential for CO2 emissions reductions offered by some such systems. Nonetheless, in uses that do not require steel reinforcement, and in locations where the MgO can be sourced at a competitive price, a detailed understanding of these systems enables their specification, design, and selection as advanced engineering materials with a strongly defined chemical basis

    Studies on germ cells. I. The history of the germ cells in insects with special reference to the Keimbahn-determinants. II. The origin and significance of the Keimbahn-determinants in animals

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    No Abstract.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/50235/1/1050250302_ftp.pd

    Ueber Selenide aus den Anden

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    Zwei neue regelmÀssige Verwachsungen verschiedener Mineralien

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    Ein neues krystallisirtes Harz auf Römischem Pech

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    Zur Kenntniss der Spermatogenese von Gryllotalpa vulgaris Latr

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