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Subterranean world
George Hartwig
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R2,599
R2,455
Discovery Miles 24 550
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Subterranean world
George Hartwig
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R2,109
R2,002
Discovery Miles 20 020
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The subterranean world
George Hartwig
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R2,597
R2,453
Discovery Miles 24 530
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The German scientific writer Georg Hartwig (1813 80) produced many
popular works on geographical and natural history topics, among
them this book, published in English in 1869. (An American version,
with additional chapters, came out in the same year.) Unusually for
the period, it surveyed exploration in the Antarctic as well as the
Arctic, though the coverage of the latter makes up the bulk of the
book. Hartwig's intention is 'to convey solid instruction under an
entertaining form', combining the history of exploration with
descriptions of the polar regions explored by the mid-century,
including Siberia as well as the islands and ice packs of the
Arctic Ocean. In this very readable work, Hartwig describes
geography, geology and climate, as well as the survival strategies
of plant, animal and human life in an extreme environment, using a
very wide range of earlier published material to create an
integrated narrative."
An international symposium titled "Functional Morphology of
Neuroendocrine Systems: Evolutionary and Environmental Aspects" was
held on the occasion of the 60th birthday of Professor Andreas
Oksche, head of the Department of Anatomy and Cytobiology, Justus
Liebig University, Giessen, FRG. This volume containing the texts
of the plenary lectures and the abstracts of poster contributions
presented at the symposium on July 30-August 1, 1986 in Giessen,
reflects the rapid expansion of the field of neuroendocrinology.
New insights into the interactions between neurons acting as
endocrine cells and conventional neurons have been gained by the
use of newly developed neurobiological techniques (e. g. , immuno-
cytochemistry, tracing of neuronal connections by means of
anterograde and retrograde axonal transport of identified molec-
ules, electrophysiological recordings in vivo and in vitro). The
findings of the past few years have extended the fundamental
concept of neurosecretion introduced by Ernst and Berta Scharrer in
close cooperation with Wolfgang Bargmann. An important landmark was
the discovery that neurons containing classical neurosecretory
products not only project to neurohemal release organs but also
establish hypothalamic and extrahypothalamic neuro-neuronal
contacts. In some of these neurons monoamine transmitters are known
to co-exist with opioid and other neuro- peptides. Different types
of transmitters may even be co-localized in the same dense core
vesicles. The use of extremely sensitive techniques which allow the
detection of minute quantities of messenger substances has provided
evidence that several of these substances have been well preserved
in the course of evolution.
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The subterranean world
George Hartwig
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R2,108
R2,001
Discovery Miles 20 010
Save R107 (5%)
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