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5 produkter
5 produkter
Del 8 - Hamburger Geophysikalische Einzelschriften
Experimentelle und theoretische Untersuchungen über die atmosphärischen Zirkulationen, den jet stream und die zyklonalen Störungen
Inbunden, Tyska, 1967
1 488 kr
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3 429 kr
Skickas inom 10-15 vardagar
The book is on methods of reconstruction of past climate, climate changes, oceanography of the South Atlantic (including the Southern Ocean) and the cycling of biochemical components in the ocean. Information about past ocean conditions is provided by so-called paleoceanographic proxies (parameters with approximate unobservable environmental variables, e.g. surface water temperature). Use of proxies and their development has been a major theme of the Collaborative Research Project at the University of Bremen for almost 10 years. In this volume we summarize our results in relation to these proxy studies. Each chapter gives an overview of a specific proxy, provides particular findings obtained in the South Atlantic and ends with an outlook on future perspectives with respect to the proxy described. Therefore it is suitable for lecturers, graduate students and scientists working in the field of climate reconstruction from ocean sediments.
Chirurgie vor 100 Jahren
Historische Studie über das 18. Jahrhundert aus dem Jahre 1876
Häftad, Tyska, 2011
394 kr
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Hormonally Defined Media
A Tool in Cell Biology Lectures and Posters Presented at the First European Conference on Serum-Free Cell Culture Heidelberg, October 7–9, 1982
Häftad, Engelska, 2011
1 064 kr
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Until some years ago serum or crude tissue extracts were used pre dominantly or exclusively as media supplements for the cultivation of cells. However, during this time evidence accumulated that these sup plements could not provide in an optimal way most of the cultivated cells with all factors necessary for their survival, their prolifer ation and/or differentiation. Moreover, a variety of cells could not be cultivated at all under these conditions and often the composition of the cultures changed within rather short periods of time by overgrowth of initially present subpopulations of those cells which grow well in these supplements, as for example fibroblasts. Nevertheless, using these supplements (or fractions thereof), insight could be gained into some of the influences of serum or tissue extract constituents with re gard to survival, proliferation and differentiation of cells in cul ture. It became obvious from these experiments that serum or tissue extracts did not only supply cells with nutrients or vitamins (which are now constituents of all basic media), but also with hormones as well as growth-, differentiation-, and attachment-factors. In course of time experiments were performed in which serum enriched with hormones and other growth factors was used to successfully culti vate those cells which could not survive in serum-supplemented media alone. Under normal conditions in an organism, however, only a small population of cells has direct contact with serum.
567 kr
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Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben.