We investigate olfactory associative learning in larval Drosophila. A reciprocal training design is used, such that one group of animals receives a reward in the presence of odor X but not in the presence of odor Y (Train: X+ // Y), whereas another group is trained reciprocally (Train: X // Y+). After training, differences in odor preference between these reciprocally trained groups in a choice...

Sampling is one of the main issues pertaining to odor characterization and measurement. The aim of sampling is to obtain representative information on the typical characteristics of an odor source by means of the collection of a suitable volume fraction of the effluent. The most important information about an emission source for odor impact assessment is the so-called Odor Emission Rate (OER), ...

Current neurobiological models of odor perception tend to emphasize the “bottom-up” contributions of odorant chemistry in determining the perceptual features of an odor. However, increasing research suggests that “topdown” effects related to learning and experience play equally important roles in human olfactory perception, implying that a given set of olfactory receptors activated by an odoran...

This paper addresses the problem of mapping odor distribution derived from a chemical source using multi-sensor integration and reasoning system design. Odor localization is the problem of finding the source of an odor or other volatile chemical. Most localization methods require a mobile vehicle to follow an odor plume along its entire path, which is time consuming and may be especially diffic...

Optimization of active edible coating formulations for pork meat application was conducted using response surface methodology. Effects (i.e. cassava starch, glycerol, and lactic acid) on the color change, pH, % drip loss, interaction (thickness), sensory acceptability (general acceptability, color, odor, texture) coated samples stored at ambient temperature were investigated a three- block rota...

Hippocampal lesions in rodents impair both object-place and odor-place associative memory. Subjects with hippocampal damage have impaired associative memory such as object-place memory. Whereas studies have investigated some types of associative memory, no investigation has specifically examined odor-place associative memory in subjects with well-defined amnesia. It is unknown whether amnesic s...

The acquisition of sensory information during behavior shapes the neural representation, central processing, and perception of external stimuli. In mammals, a sniff represents the basic unit of odor sampling, yet how sniffing shapes odor representations remains poorly understood. Perhaps the earliest hypothesis of the role of sniffing in olfaction arises from the fact that odorants with differe...

Livestock operations are associated with emissions of odor, gases, and particulate matter (PM). Livestock odor characterization is one of the most challenging analytical tasks. This is because odor-causing gases are often present at very low concentrations in a complex matrix of less important or irrelevant gases. The objective of this project was to develop a set of characteristic reference od...

The olfactory system of an insect brain codes for information about odorant quality and quantity using the temporal pattern of neural activity as well as neurons' firing. Although an accurate odor temporal pattern is indispensable for investigations of olfactory systems, it is difficult to control in conventional odor stimulators. To overcome this problem, we fabricated an odor stimulator that ...

An evolutionary robotics approach to the task of odor source localization is investigated. In particular, Continuous Time Recurrent Neural Networks (CTRNNs) are evolved for odor source localization in simulated turbulent odor plumes. In the experiments, the simulated robot is equipped with a single chemical sensor and a wind direction sensor. Two main contributions are made. First, it is shown ...