The prevalence of perceptions of odors and sensations of air humidity and sick building syndrome symptoms in domestic environments were studied using responses to a questionnaire on the home environment. Parents of 4530 1-8 year old children from randomly selected kindergartens in Chongqing, China participated. Stuffy odor, unpleasant odor, pungent odor, mold odor, tobacco smoke odor, humid air...

How do valenced odors affect the perception and evaluation of facial expressions? We reviewed 25 studies published from 1989 to 2020 on cross-modal behavioral effects faces. The results indicate that may influence evaluations classifications in several ways. Faces are rated as more arousing during simultaneous odor exposure, valence faces is affected direction valence. For classification tasks,...

Abstract Background Olfaction is a complex process involving different neurological mechanisms with correlation between the chemical structure and quality of odors regarding pleasantness. This study aimed to compare detection pleasant unpleasant in grades hyposmia. A descriptive cross-sectional was conducted preceded by preliminary pilot study, including 20 normal subjects without history The c...

A questionnaire survey was performed in eight Chinese cities (40,279 adults participated; response rate 75%). There were questions on demographic information of the participants, allergic rhinitis, asthma, perceived odors and home environment. The majority women (74.7%) 12.2% smokers; 6.6% reported rhinitis 1.6% asthma. Totally 38% stuffy odor; 24.6% unpleasant 11.5% pungent odor 10.4% mold odo...

advanced during the period of the last one hundred years. They center around the receptor and its relation with the odorant molecule. A classification of the theories is presented and the information approach to olfaction is discussed. The measurement of odors and odor identification has a very practical application in industry and since there is yet no universal odor unit, measurement has been...

Indoor air quality problems are usually revealed by occupants' complaints. In this study, the odors of two types of hardwood species, namely, Cathy poplar (Populus cathayana Rehd.) and rubberwood (Hevea brasiliensis) were selected and extracted with ethanol-toluene for removal of extractives in an attempt to eliminate the odors. The odorous components of neat and extracted woods were identified...

The mere exposure phenomenon refers to improvement of one's attitude toward an a priori neutral stimulus after its repeated exposure. The extent to which such a phenomenon influences evaluation of a priori emotional stimuli remains under-investigated. Here we investigated this question by presenting participants with different odors varying in a priori pleasantness during different sessions spa...

Recent findings suggest that novel associations can be learned during sleep. However, whether associative learning during sleep can alter later waking behavior and whether such behavioral changes last for minutes, hours, or days remain unknown. We tested the hypothesis that olfactory aversive conditioning during sleep will alter cigarette-smoking behavior during ensuing wakefulness. A total of ...