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comparative analysis of volatile defensive secretions of three species of pyrrhocoridae (insecta: heteroptera) by gas chromatography-mass spectrometric method.the true bugs (hemiptera: heteroptera) have evolved a system of well-developed scent glands that produce diverse and frequently strongly odorous compounds that act mainly as chemical protection against predators. a new method of non-lethal sampling with subsequent separation using gas chromatography with mass spectrometric detection was proposed for analysis of these volatile defensive secretions. separation was performed on rtx-200 column containing fluorinated polysiloxane stationary phase. va ...201627997627
capillary electrophoresis of pterin derivatives responsible for the warning coloration of heteroptera.a new capillary electrophoretic (ce) method has been developed for analysis of 10 selected derivatives of pterin that can occur in the integument (cuticle) of true bugs (insecta: hemiptera: heteroptera), specifically l-sepiapterin, 7,8-dihydroxanthopterin, 6-biopterin, d-neopterin, pterin, isoxanthopterin, leucopterin, xanthopterin, erythropterin and pterin-6-carboxylic acid. pterin derivatives are responsible for the characteristic warning coloration of some heteroptera and other insects, signa ...201424602308
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