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841.
Pheromones — semiochemicals used by insects for intraspecific chemical communication — can be isolated and with special analytical techniques their chemical structure elucidated. With stereoselective synthesis methods, presented by the preparation of sex attractants and aggregating pheromones of moths and beetles, respectively, a synthetic access to compounds is given which can be used for behavior manipulation of insects. Aside the importance of these compounds for investigations of the sensoric process the possibility of their application in an integrated and biological pest control is discussed. 相似文献
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Research in molecular neurobiology has recently entered a new phase of rapid development as a result of the application of the techniques of molecular genetics. This is illustrated by recent work on the electric ray (Torpedo marmorata and T. californica), whose electric organ is a rich source of cholinergic synapses. Other examples from recent literature of the application of the recombinant DNA technique to the mammalian central nervous system are given and possible future developments are discussed. 相似文献
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K. E. Kaissling G. Kasang H. J. Bestmann W. Stransky O. Vostrowsky 《Die Naturwissenschaften》1978,65(7):382-384
The female silkmoth Bombyx mori L. emits a second pheromone component bombykal (E-10, Z-12-hexade-cadien-1-al) in addition to the well-known sexual attractant bombykol (E-10, Z-12-hexadecadien-1-ol). Bombykal stimulates its own specialized and highly sensitive olfactory cells of the male moth. Surprisingly, the aldehyde inhibits the release of the male's wing-fluttering response to bombykol. 相似文献
846.
Salinity variations can be considered as a potential source of information for orientation in the marine environment. To
use this kind of environmental information marine animals must be able to detect these salinity differences. Therefore we
determined salinity-difference thresholds of two harbour seals for the discrimination of seawater solutions as a function
of the salinity level (15–35‰) and compared them with the thresholds of human subjects. Whereas in humans thresholds increased
with increasing salinity level, thresholds of seals decreased with increasing salinity level. Both seals achieved best sensitivity
at 30‰ salinity, where they detected a salinity difference ≤4%. These data indicate that the ability of seals to detect salinity
differences of seawater is well tuned to the natural occurrence of this environmental information. Their high gustatory resolving
power for differences in seawater salinity is suggested to meet the basic requirements for chemosensory orientation of seals
in the marine habitat.
Received: 10 February 2000 / Accepted in revised form: 19 September 2000 相似文献
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