Using a conditioning paradigm, the olfactory sensitivity of CD-1 mice for a homologous series of aliphatic aldehydes (n-butanal to n-nonanal) was investigated. With all six odorants, the animals significantly discriminated concentrations below 4 ppb (parts per billion) from the odorless solvent, and with n-butanal, n-heptanal, and n-nonanal the best-scoring animals were even able to detect conc...

This study aimed to characterize the effect of jasmonic acid (JA) on volatile compounds in grains of Kam sweet rice. Using GC-O and SPME-GC-MS, nonanal displayed the highest odor activity value (OAV) in the filling grains and increased after applicaton of jasmonic acid in the rice seedlings. The relative expression of rice OsLOX3 (rice lipoxygenase 3) and OsHPL1 (rice hydroperoxide lyase 1) was...

background: the genus lomatopodium fisch. & c.a.mey., belongs to apiaceae family and contains one herbaceous species growing wildly in iran. there are only a few papers about the chemical constituents of these plants. here, we focused on the isolation and identification of the main flavonoid glycosides and sterols from the aerial parts of l. staurophyllum, which has not been previously reported...

Laricobius nigrinus Fender (Coleoptera: Derodontidae) is a specialist predator of the hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), native to the Pacific Northwest. It has been introduced into the eastern United States for biological control of exotic hemlock woolly adelgid populations that threaten native hemlock. The possible role of olfactory cues in host finding by t...

The leaves of Arum conophalloides (Araceae) were used in some west areas of Iran as a dessert. The aerial parts of the herb were collected from Sahneh Mountains, Kermanshah Province, West of Iran and was hydrodistilled by Klevenger-type apparatus. Composition of the essential oil was determined by GC and GC/MS. Totally, 18 components (92% of total essential oil) were identified. The oil contain...

Adults, particularly males, of a papilionid butterfly, Papilio machaon hippocrates, emit a fairly strong scent perceivable by humans. We have identified a variety of volatile compounds (hydrocarbons, alcohols, aldehydes, ketones, esters, and so on) from the wings and bodies of both sexes of the butterfly. Male wings secreted n-dodecane, linalool and geranylacetone as major components together w...

OBJECTIVE to analyze the chemical components of the smoke from electrocautery from coagulating muscle and liver tissues of pigs. METHODS we collected smoke produced by electrocautery applied to porcine tissue in previously evacuated bottles, with qualitative and quantitative analysis of the compounds present through the hyphenated technique gas chromatography / mass spectrometry. RESULTS th...