Results 121 to 130 of about 682 (155)

Spray mechanism of crepidogastrine bombardier beetles (Carabidae; Crepidogastrini)

Chemoecology, 2001
The defensive glandular apparatus of primitive bombardier beetles of the tribe Crepidogastrini (Carabidae) is described for the first time. As exemplified by two African species (Crepidogaster ambreana and C. atrata), the apparatus conforms to the basic bombardier plan, in that the glands are bicompartmented and the secretion is quinonoid (it contains ...
Athula Attygalle
exaly   +2 more sources

Biosynthetic origin of benzoquinones in the explosive discharge of the bombardier beetle Brachinus elongatulus

Die Naturwissenschaften, 2020
Bombardier beetles are well-known for their remarkable defensive mechanism. Their defensive apparatus consists of two compartments known as the reservoir and the reaction chamber. When challenged, muscles surrounding the reservoir contract sending chemical precursors into the reaction chamber where they mix with enzymes resulting in an explosive ...
Athula Attygalle, Wendy Moore, Aman S Gill   +2 more
exaly   +3 more sources

Functional anatomy of the explosive defensive system of bombardier beetles (Coleoptera, Carabidae, Brachininae)

Arthropod Structure and Development, 2015
This paper provides the first comparative anatomical study of the explosive pygidial defensive system of bombardier beetles in species classified in three brachinine subtribes: Brachinus (Brachinina), Pheropsophus (Pheropsophina) and Aptinus (Aptinina).
Andrea Di Giulio, Roberto Romani
exaly   +3 more sources

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
exaly   +2 more sources

Defensive reaction time of bombardier beetles

Journal of Chemical Ecology, 1979
exaly   +2 more sources

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

Bombardier beetle based biosensor

Biosensors and Bioelectronics, 1996
A biosensor constructed by combining an oxygen electrode with the liquid ejected by bombardier beetles (Pheropsophus aequinoctialis) immobolized on a collagen membrane is developed for hydrogen peroxide. The sensor presents a linear range of 2.0 x 10(-4)-2.0 x 10(-3) M and a reproductibility of approximately 2%.
H S, Nakatani, G, de Oliveira Neto, O E, Godinho, L M, Aleixo, K, Zinner   +4 more
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources