Results 271 to 280 of about 4,478,531 (313)
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A chemical defence against phage infection
Nature, 2018The arms race between bacteria and the phages that infect them drives the continual evolution of diverse anti-phage defences. Previously described anti-phage systems have highly varied defence mechanisms1-11; however, all mechanisms rely on protein components to mediate defence.
Sarah, Kronheim +7 more
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Chemical Defences in Aquatic Plants
The Journal of Ecology, 1986(1) Fifteen species of aquatic vascular plants were examined for the presence of alkaloids. (2) The alkaloid content ranged from 0.13 mg g-1 dry weight in Heteranthera dubia to 0.56 mg g-1 dry weight in Potamogeton crispus. These concentrations are within a range which has been found to be pharmacologically active in previous studies, and can therefore
M. L. Ostrofsky, E. R. Zettler
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THE BODY'S CHEMICAL MECHANISMS OF DEFENCE*
Nature, 1947THE defence of the body against the poisonous action of compounds of simple chemical constitution is effected by a variety of chemical reactions. The toxic compound may be oxidized to a non-poisonous product, or to one for which a rapid means of elimination exists.
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Chemical Defence of a Centipede (Clinopodes Flavidus)
Journal of Insect PhysiologyChemical substances are of utmost importance for the biotic interactions between animals and their predators/parasites; many of these semiochemicals are emitted for defence purposes. One of the most deterrent and toxic biogenic substances we know of is hydrogen cyanide, which can be stored by certain insects, millipedes, centipedes and arachnids in the
Mitić, Bojan +6 more
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Chemical Defence Strategies of Higher Fungi
Chemistry – A European Journal, 2008AbstractLike plants, fungi have evolved a variety of defence strategies in order to protect themselves against feeding mammals, insects and infection with parasitic fungi. In contrast to plants little is known on the chemical ecology of fruiting bodies of higher fungi, particularly those defence mechanisms which are induced upon wounding have only ...
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Chemical Defence in the Termite Ancistrotermes cavithorax
1979Abstract The defensive secretion of the soldiers of the termite Ancistrotermes cavithorax have been shown to consist largely of three new sesquiterpenes. The minor soldiers produce ancistrodial (1) exclusively, whereas the major soldiers secrete ancistrofuran (2) together with a bicyclic unsaturated dialdehyde (3).
Raymond Baker +2 more
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A contribution to chemical defence in World War II
Trends in Biochemical Sciences, 2000We thank Professor Peter Newell for continuing to allow us space in the Department, and Drs G. Brown and B. Henning for helpful comments and Ms Alex Morgan for assistance with the figures.
M G, Ord, L A, Stocken
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Nuclear biological and chemical defence
The RUSI Journal, 1981Summary NBC weapons can all be used in war. Future aggressors may see them as attractive options to be exercised. They could cause mass casualties. Good defensive measures are essential. Only with the ability to protect the service person, reduce potential casualties and give our troops the ability to continue fighting in an NBC environment, will we be
A.G. Vicary, J. Wilson
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Capsaicin: Tailored Chemical Defence Against Unwanted “Frugivores”
ChemBioChem, 2009AbstractWhy are chilli peppers hot? The vanillyl amide, capsaicin, has long been known as the pungent principle of peppers, but only in their recent work have Tewksbury et al. addressed its ecological roles: to distract unsuitable seed dispensers and to protect the seeds against fungal infection by Fusarium.magnified ...
Schulze, B., Spiteller, D.
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