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The Cnidaria - Only a Problem or Also a Resource? (Hardcover)
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The Cnidaria - Only a Problem or Also a Resource? (Hardcover)
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Cnidarians are elegant and dazzling aquatic organisms, but despite
their beauty they are known to be a threat in many coastal areas
around the world. Several species of cnidaria living in tropical or
sub-tropical areas are remarkably dangerous, but many Mediterranean
species can also cause serious health problems. Really, cnidarians
(sea anemones, corals, medusae) are considered among the most
dangerous and venomous organisms, thanks to the occurrence in their
tissues of batteries of intracellular capsules (nematocysts or
cnidocysts) produced by the Golgi apparatus of specialized cells
(nematocytes or cnidocytes) from which the phylum Cnidaria takes
the name (from the Greek II"I-I'I* = nettle). The consequences of
human encounters with cnidarians vary widely, from simple skin
irritation to serious anaphylactic manifestations in sensitive
subjects. During the last few decades, cnidarians have been
perceived as increasingly dangerous due to recurrent jellyfish
outbreaks which constitute a threat both for human health and
economy and for the environmental equilibrium. In addition, the
occurrence of alien species, whose spread is facilitated by human
activities, environmental changes, global warming, or man-made
modifications of the natural features of territories, pose new and
serious challenges to environmental management. For all these
reasons, cnidarians can be viewed as a problem. Nevertheless,
cnidarians are also viewed with particular interest due to their
potential in the field of natural products. Scientists have
realized the potential of natural resources hidden in aquatic
environments for the development of new drugs or bioactive
substances with wide potential use. At present, an enormous
scientific literature is available about the value of cnidarian
products as potential therapeutic agents, in human nutrition, or
for other applications. As such, these organisms can also be
reasonably considered a resource. Taking into consideration these
two main aspects, this book aims to collect the experiences and
recent research data on cnidarians and review present knowledge on
the subject.
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