The ability of odours to cue vivid and emotionally intense memories is well known. However the majority of research has focused on the extent to which odours can act as environmental cues to memory, where odours are presented alongside the stimuli to be remembered, rather than the extent to which pre-existing associations between odour and odour related stimuli might influence memory. Here, par...

The qualitative and quantitative composition of the floral odour of Peltandra uirginica was determined by trapping odour components from freshly cut inflorescences on Tenax and Carbotrap adsorbents using a purge and trap apparatus. Analysis showed that a single novel compound, 1,3,6-trimethyl-2,5-dioxabicyclo[3.2.l.]nonane, comprised nearly 70% of the odour. Four isomers of this compound were f...

Previously, we observed enhanced long-term memory for objects used (central objects) by committee members in the Trier Social Stress Test (TSST) on the next day. In addition, startle responsivity was increased. However, response specificity to an odour involved in the stressful episode was lacking and recognition memory for the odour was poor. In the current experiments, immediate effects of th...

In many sensory systems adaptation acts as a gain control mechanism that optimizes sensory performance by trading increased sensitivity to low stimulus intensity for decreased sensitivity to high stimulus intensity. Adaptation of insect antennal olfactory receptor neurons (ORNs) has been studied for strong odour concentrations, either pulsed or constant. Here, we report that during slowly oscil...

BACKGROUND/AIMS While the social significance of flatus derives mainly from its odour, previous studies have focused on the non-odoriferous components of rectal gas. The aims of the present study were to determine the role of sulphur-containing gases in flatus odour and test the efficacy of a device purported to reduce this odour. METHODS Flatus was quantitatively collected via rectal tube fr...

Many farmers are interested in finding ways of controlling odour on their farms. Reducing odour associated with hog farming will be instrumental to the success of our industry. Ontario Pork and other organizations worldwide are searching for ways to reduce odour. Sorting through the enormous amount of information is quite daunting. Ontario Pork and others in the red meat sector in collaboration...

Structure-odour relationship analyses using hierarchical clustering were carried out on a diverse dataset of 47 molecules. These molecules were divided into seven odour categories: ambergris, bitter almond, camphoraceous, rose, jasmine, muguet, and musk. The alignment-independent descriptor EVA (EigenVAlue) was used as the molecular descriptor. The results were compared with those of another ki...

An electronic nose (e-nose) is a device that analyzes the chemical components of an odour. The e-nose consists of an array of gas sensors for chemical detection, and a mechanism for pattern recognition to return the odour concentration. Odour concentration defines the identifiability and perceivability of an odour. Given that accurate prediction of odour concentration requires valid measurement...

The availability of virgin soils and traditional landfill covers are not only costly and increasingly becoming scarce, but they also reduce the storage capacity of landfill. The problem can be overcome by the utilisation of certain suitable waste streams as alternative landfill covers. The objective of this study was to assess the suitability of Construction & Demolition fines (C&D), Commercial...