We used positron emission tomography (PET) to investigate brain regions associated with odor imagery. Changes in regional cerebral blood flow (CBF) during odor imagery were compared with changes during nonspecific expectation of olfactory stimuli and with those during odor perception. Sixty-seven healthy volunteers were screened for their odor imagery (with a paradigm developed in a previous st...

60 Human body odor is generated by waste materials present on the skin surface and secretions from the sweat and sebaceous glands. These waste materials are converted to characteristic odorous compounds through oxidative degradation or metabolism by skin microbes. Changes in body odor due to aging relate to the amount and composition of sweat and sebum secreted, as well as gland activity. 2-Non...

INTRODUCTION Infant body odor is subjectively pleasant to parents and activates reward areas in the brain. Hence, body odor perception might contribute to parental bonding. However, it is unknown whether the perceived pleasantness of children's body odor varies over the course of a child's development. METHODS Two hundred and thirty-five parents (M = 36.9 years, SD = 7.3) were asked to assess...

Since the Law of Offensive Odor Control was enacted, many enterprises have made efforts to prevent odor nuisance. Odor survey was conducted at each factory and characteristics of odor emission for each kind of business were made clear. And many researches and developments have been carried out to confirm reliable technique. In order to remove odorants from exhaust gas, deodorizing plants have b...

Microplitis croceipes (Cresson) (Hymenoptera: Braconidae) learns odors in association with both hosts and food. The food-associated ‘seeking’ behavior of M. croceipes was investigated under various training protocols utilizing the conditioning odor, 3-octanone. We investigated the effects of odor training, or its lack, training duration, training frequency, time elapsed after training, wasp hun...

One-day-old, awake infants underwent an olfactory classical conditioning procedure to assess associative learning within the olfactory system of newborns. Experimental infants received ten 30-second pairings of a novel olfactory conditioned stimulus (a citrus odor of neutral value) and tactile stimulation provided by stroking as the reinforcing unconditioned stimulus (a stimulus with positive p...

A great deal of work has been done to develop techniques for odor analysis by electronic nose systems. These analyses mostly focus on identifying a particular odor by comparing with a known odor dataset. However, in many situations, it would be more practical if each individual odorant could be determined directly. This paper proposes two methods for such odor components analysis for electronic...