Sentences with word «pyrazine»

In the case of Atta sexdens rubropilosa, substances belonging to the class of heterocyclic compounds known as pyrazines guide the ants without deviation on their way to the anthill.
Researcher Mônica Tallarico Pupo, a professor in the University of São Paulo's Ribeirão Preto School of Pharmaceutical Sciences (FCFRP - USP) and the principal investigator for the project, stressed that pyrazine production by the ants» microbiome was observed in more than one colony.
He heated the two compounds, filling his laboratory with the odor of pyrazines, a toastlike scent tempered with a hint of chocolate.
Other substances, such as menthol (42.9 % of samples), ethyl vanillin (16.5 % of samples) and acetyl pyrazine (8.2 % of samples), are classified as «able to cause respiratory irritation.»
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«We found both pyrazines and bacteria in the ants» poison glands,» Pupo said.
The pyrazine - producing bacterium was discovered by chance when the scientists were looking for microorganisms capable of protecting ant colonies from parasitic fungi.
«We decided to investigate the volatile compounds produced by this bacterium and discovered the pyrazines, among which there was a molecule not described in the scientific literature,» Pupo said.
The developed analysis method was applied to various single - molecule junctions, i.e., those of 1,4 - butanediamine (DAB), pyrazine (PY), 4,4» - bipyridine (BPY), and fullerene (C60), sandwiched by gold electrodes, and the different molecular - dependent electronic and structural fluctuations were demonstrated.
But when he added phenol to the mix, the pyrazine aroma practically disappeared.
Finally, the replacement of the pyridine ring with a pyrazine moiety (compound 164) conferred an antiviral potency comparable to that of the benzyl analogue 157.
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