scholarly journals Impact of Drought Index Detection Thresholds - the Case of Babna District, Bangladesh

2021 ◽  
Vol 8 (11) ◽  
Keyword(s):  
Drought Index ◽  
Detection Thresholds

Analysis and Identification of Off-Odor Compounds in Electronic Systems

2006 ◽  
Author(s):  
Mary Ann Nailos ◽  
Dan Stein ◽  
Lawrence T. Nielsen ◽  
Anna Iwasinska
Keyword(s):  
Volatile Compounds ◽  
Electronic Systems ◽  
Detection Thresholds ◽  
Detection And Identification ◽  
Odor Compounds ◽  
Novel Method ◽  
Odor Analysis ◽  
Analytical System ◽  
Task Perception ◽  
Analytical Tools

Abstract The detection and identification of substances that give rise to aromas and off-odors is often a difficult task. Perception of odors is very subjective and odor detection thresholds vary from person to person. The identification of trace levels of compounds responsible for perceived odors is difficult using conventional analytical tools. This paper will focus on a novel method for sampling and analyzing aromatic volatile compounds using an analytical system specifically designed for odor analysis.

Olfactometric characterisation of sludge odours

2000 ◽  
Vol 41 (6) ◽  
pp. 49-55 ◽  
Author(s):  
S. D. Lambert ◽  
A. L. Beaman ◽  
P. Winter
Keyword(s):  
Recent Work ◽  
Sewage Treatment ◽  
Limited Information ◽  
Hedonic Tone ◽  
Detection Thresholds ◽  
Remediation Measures ◽  
Odour Concentration ◽  
Odour Profile ◽  
Storage Facilities

Conventional olfactometric techniques have been used to evaluate odours from sewage treatment and sludge storage facilities primarily in terms of odour concentration relative to their detection thresholds. However, such data conveys limited information that would be useful for determining the causes of most odours or the most appropriate remediation measures to be taken. Thispaper discusses some recent work undertaken to characterise the olfactometric profiles of different odours. Standard descriptive terms were used to characterise odours at normalised, moderately strong concentrations. These were used directly for the calculation of hedonic tone. They were also collated into a small number of generic odour groups and plotted to allow visual comparisons of different odour profile fingerprints. Such odour characterisations have proved to be very useful and may easily be incorporated into normal olfactometric evaluations.

scholarly journals Chemical Intolerance Is Associated With Altered Response Bias, not Greater Sensory Sensitivity

i-Perception ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 204166952097842
Author(s):  
Linus Andersson ◽  
Petra Sandberg ◽  
Elisabeth Åström ◽  
Moa Lillqvist ◽  
Anna-Sara Claeson
Keyword(s):  
Decision Rule ◽  
Response Bias ◽  
Adverse Reactions ◽  
Sensory Sensitivity ◽  
Detection Thresholds ◽  
Chemical Intolerance ◽  
Altered Response ◽  
Low Levels ◽  
Sensory Acuity ◽  
Method Of Constant Stimuli

Chemical intolerance is a surprisingly prevalent condition or affliction characterized by adverse reactions to low levels of chemical, often odorous stimulation. Sufferers often assume that their plight is due to an uncommon sensory acuteness, yet studies repeatedly fail to reveal altered detection thresholds. Here, we investigated whether self-reported chemical intolerance is associated with altered sensory sensitivity or response bias. The sensory acuity (sensitivity; A) and sensory decision rule (criterion; B) to n-butanol was assessed using the method of constant stimuli in 82 participants with different degrees of chemical intolerance (low to high). Higher self-reported chemical intolerance was associated with a lower criterion, but not with sensitivity.

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