Results 121 to 130 of about 76,500 (155)

Defense of bombardier beetles against avian predators

The Science of Nature, 2020
Bombardier beetles (Coleoptera, Carabidae, Brachininae) possess a remarkable defense mechanism where a hot chemical spray is released from the tip of their abdomen, with an audible explosive sound. To date, the repellent properties of these chemicals have been tested against a limited number of taxa, such as amphibians and insects.
Wataru Kojima, Ryo Yamamoto
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The bombardier beetle

Journal of Chemical Education, 1972
The chemistry behind the bombardier beetle's chemical defenses illustrates the principles of reaction rates, catalysis, and laboratory safety.
Robert C. Plumb, Karen L. Erickson
openaire   +1 more source

Nonlinear Dynamics of the Bombardier Beetle

Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise, 1999
Abstract This work investigates the dynamics by which the bombardier beetle releases a pulsed jet of fluid as a defense mechanism. A mathematical model is proposed which takes the form of a pair of piece wise continuous differential equations with dependent variables as fluid pressure and quantity of reactant.
Richard H. Rand, Erika T. Wirkus, J. Robert Cooke   +2 more
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Defensive Spray of the Bombardier Beetle: a Biological Pulse Jet

Science, 1990
The defensive spray of the bombardier beetle Stenaptinus insignis is ejected in quick pulses (at about 500 pulses per second) rather than as a continuous stream. The pulsation may be a consequence of intermittency in the explosive chemical process that generates the spray.
J, Dean, D J, Aneshansley, H E, Edgerton, T, Eisner   +3 more
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Spray Aiming in Bombardier Beetles: Jet Deflection by the Coanda Effect

Science, 1982
Bombardier beetles of the carabid subfamily Paussinae have a pair of flanges, diagnostic for the group, that project outward from the sides of the body. Behind each flange is a gland opening, from which the beetles discharge a hot, quinone-containing secretion when disturbed.
T, Eisner, D J, Aneshansley
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Spray Mechanism of the Most Primitive Bombardier Beetle (Metrius Contractus)

Journal of Experimental Biology, 2000
ABSTRACT The bombardier beetle Metrius contractus discharges its defensive secretion as a froth that clings to its body. When attacked from the rear, it allows the froth to build up over the gland openings near the abdominal tip; when attacked from the front, it conveys the secretion forwards along special elytral tracks. M.
T, Eisner, D J, Aneshansley, M, Eisner, A B, Attygalle, D W, Alsop, J, Meinwald   +5 more
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Bombardier beetles of genus Brachinus Weber, 1801 (Carabidae: Brachininae: Brachinini) from India

Zootaxa, 2020
Brachinus devagiriensis sp. nov. is described from the Western Ghats, a global hot spot of biodiversity in southwest India. Detailed diagnostic features of the 27 species of Indian Brachinus with a key to the species are provided. 
S.V. AKHIL, M. DIVYA, K. THOMAS SABU
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Chemistry of defensive secretions of bombardier beetles (Brachinini, Metriini, Ozaenini, Paussini)

Journal of Insect Physiology, 1977
Abstract Data are given on the chemical composition of the defensive secretions of species of carabids of the genera Brachinus, Stenaptinus, Metrius, Goniotropis, Pachyteles, Ozaena, and Homopterus. All produce quinonoid secretions, containing from one to three of four different benzoquinones (1,4-benzoquinone; 2-methyl-1,4-benzoquinone; 2,3-dimethyl-
Thomas Eisner, Tappey H. Jones, Daniel J. Aneshansley, Walter R. Tschinkel, Robert E. Silberglied, Jerrold Meinwald   +5 more
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Biochemistry at 100°C: Explosive Secretory Discharge of Bombardier Beetles ( Brachinus )

Science, 1969
The defensive chemical spray of bombardier beetles is ejected at 100°C, with a heat content of about 0.2 calorie per milligram.
D J, Aneshansley, T, Eisner, J M, Widom, B, Widom   +3 more
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Effect of bombardier beetle spray on a wolf spider: repellency and leg autotomy

CHEMOECOLOGY, 2006
Data are presented on the repellency of the spray of a bombardier beetle (Pheropsophus aequinoctialis) to a lycosid spider (Lycosa ceratiola). The secretion is shown to cause the spider to desist from its assault on the beetle within, on average, 58 ms of onset of the beetle’s secretory emission, a reaction time that is at a par with latencies ...
Thomas Eisner, Daniel Aneshansley, Marta L. del Campo, Maria Eisner, J. Howard Frank, Mark Deyrup   +5 more
openaire   +1 more source