Detection odors. Medical search. Frequent questions

Individuals carrying a gene variant associated with Alzheimer's disease, APOE e4, may experience early loss in their ability to detect odors, hinting at future cognitive challenges. (neurosciencenews.com)
The human nose is very sensitive and has the ability to detect odors that are below the detection level of any currently available device. (aqmd.gov)

The odor threshold value of an odorant is influenced by the medium. (wikipedia.org)
Schymura D, Forstner M, Schultze A, Kröber T, Swevers L, Iatrou K, Krieger J. Antennal expression pattern of two olfactory receptors and an odorant binding protein implicated in host odor detection by the malaria vector Anopheles gambiae . (ijbs.com)
Odor-detection in the malaria mosquito Anopheles gambiae involves large families of diverse proteins, including multiple odorant binding proteins (AgOBPs) and olfactory receptors (AgORs). (ijbs.com)
Olfactory perception is known to be highly flexible and is related to the age, gender, cultural background of the perceiver, the environment in which the odor is perceived or the characteristics of the odorant itself like its chemical composition or its concentration. (frontiersin.org)
The odors are from odorant compounds (including mercaptans) that are added to natural gas and can be smelled at very low odor threshold levels (around or below 1 part per billion - ppb). (aqmd.gov)
Natural gas is colorless and odorless, so we add a chemical odorant called mercaptan for easy detection. (atlantagaslight.com)
This odorant has a distinctive "rotten egg" type odor. (atlantagaslight.com)

However, males of various blood-sucking mosquito species are known to also respond to odors emanating from hosts of the females [ 2 ], which may allow them to find their mating partners at the host location. (ijbs.com)
In one of the first successful attempts at genetically engineering mosquitoes, HHMI researchers have altered the way the insects respond to odors, including the smell of humans and the insect repellant DEET. (neurosciencenews.com)

enhancing sensitivity of odor detection. (wikidoc.org)
After 2 months of training with COVID-19 odor samples in the laboratory, the dogs achieved a sensitivity and specificity of more than 95% for detecting the virus. (medscape.com)

Olfactory function is more impaired in patients with primary progressive MS than that in relapsing-remitting MS. Some species can detect odors that others cannot. (wikipedia.org)
It is the system's ability to detect and analyze complex odors, without the need for specialized infra-structure, that is the envy of many scientists. (ibecbarcelona.eu)
Researchers have identified the Ggamma13 protein is critical for the ability for mammals to detect odors. (neurosciencenews.com)
You should act any time you detect even a small amount of this odor in the air. (atlantagaslight.com)

The odor detection threshold is the lowest concentration of a certain odor compound that is perceivable by the human sense of smell. (wikipedia.org)
The olfactory mechanisms responsible for a compound's different detection threshold is not well understood. (wikipedia.org)
For raw water treatment and waste water management, the term commonly used is Threshold Odor Number (TON). (wikipedia.org)
The recognition threshold or arousal threshold of olfactory neurons is the concentration at which you can identify an odor (air, water and fat). (wikipedia.org)
Odor threshold value (OTV) (also aroma threshold value (ATV), Flavor threshold) is defined as the most minimal concentration of a substance that can be detected by a human nose. (wikipedia.org)
Odor threshold value can be expressed as a concentration in water or concentration in air. (wikipedia.org)
Examples of substances with strong odors: Grapefruit mercaptan (OTV = 0.1 ppt) Sotolon (OTV = 1 ppt) (Z)-8-tetradecenal (OTV = 9 ppt in water) Geosmin (OTV = 10 ppt) strawberry furanone (OTV = 40 ppt) Trimethylamine (OTV = 0.37 - 1.06 ppb) p-vinylguaiacol (OTV = 10 ppb) Threshold in a food is dependent upon: The threshold of the aroma in air. (wikipedia.org)
Olfactometer Taste detection threshold Lin, S (1977). (wikipedia.org)
The odor detection threshold is the lowest concentration that humans can smell. (cdc.gov)
The odor recognition threshold is the concentration at which you can identify an odor. (cdc.gov)
The assessments include two olfactory testing sessions conducted 4-weeks apart, each comprising a standard odour detection threshold test (i.e. (nature.com)
SE = 0.4) in terms of olfactory detection threshold. (nature.com)
For example, experience has shown that chemicals with a low odor threshold often require low OELs even though many are not toxic or do not cause irritation at those air concentrations. (cdc.gov)

Cyanobacteria and associated toxins and taste-and-odor compounds are of increasing environmental concern. (usgs.gov)
However, consistent guidelines for the development of studies assessing cyanobacterial toxins and taste-and-odor compounds presently are not available. (usgs.gov)
24 compounds were found to be biologically active in male olfactory receptors based on gas chromatography with electroantennographic detection (GC-EAD). (bioone.org)
Gas chromatography (GC) analyses of odors from individual flowers showed less intraspecific variation in the odor bouquets of the biologically active compounds as compared to nonactive compounds. (bioone.org)
B. cinerea-host interaction affect emissions of volatile compounds during infection resulting in a characteristic earthy, mushroom odor. (who.int)

While female Anopheles rely on their sense of smell to find a blood host in addition to sugar providing plants and appropriate oviposition sites [ 1 ], the nectar feeding male mosquitoes mainly use their olfactory system to locate host plant odors [ 2 , 3 ]. (ijbs.com)
These signals, which are not detected consciously as odors by the olfactory system, mediate human autonomic, psychological, and endocrine responses. (medscape.com)

Researchers shed light on the role of astrocytes, a type of brain cell, in olfactory perception or smell detection. (neurosciencenews.com)
Olfactory perception, and especially affective responses of odors, is highly flexible, but some mechanisms involved in this flexibility remain to be elucidated. (frontiersin.org)
The influences of people's characteristics including gender, hometown region, and fragrance usage habit on odor perception were further discussed. (frontiersin.org)
Odor perception of nine essential oils, which can be divided into the ester-alcohol type (e.g., lavender oil) and terpene type (e.g., lemon oil) were evaluated under three odor concentrations. (frontiersin.org)
The results indicated that chemical type, but not concentration, significantly influenced the odor perception and there was no interaction between the two factors in this study. (frontiersin.org)
The arousal and emotional perception scores of odors with terpene-type oil were significantly higher than odors with ester-alcohol type. (frontiersin.org)
The habits of fragrance usage also significantly influenced some of the odors' subjective intensity and emotional perception ratings. (frontiersin.org)
These results suggested that users' cultural characteristics could be considered to be important factors that affect the essential oil's odor perception in aromatherapy. (frontiersin.org)
However, aromachology research has found that odor subjective perception was relevant to the possible impact of odor ( Herz, 2009 ). (frontiersin.org)
The olfactory bulb is a structure of the vertebrate forebrain involved in olfaction , the perception of odors. (wikidoc.org)

Optical fibre long period grating sensor with a polyelectrolyte alternate thin film for gas sensing of amine odors Sensors and Actuators B: Chemical. (nottingham.ac.uk)

As such, odor thresholds cannot be accurately predicted. (wikipedia.org)
Optical isomers can have different detection thresholds because their conformations may cause them to be less perceivable for the human nose. (wikipedia.org)
determine typical odor onset levels (thresholds). (cdc.gov)
Since methods to define and determine odor onset levels (thresholds) vary greatly, many substances have a wide range of reported odor onset levels (thresholds). (cdc.gov)

Environmental odor complaints are typically handled at the county or local level. (cdc.gov)
On June 30, the local environmental health authority registered 41 complaints that foul odors were causing appetite loss, nausea, and vomiting in some exposed persons. (cdc.gov)
As the day progressed, residents (mostly living south of the building) lodged 118 complaints about the foul odors with the environmental health office. (cdc.gov)
On October 24, 2015, SCAQMD received the first air quality complaints resulting from sulfur type odors associated with the natural gas leak from Well SS-25. (aqmd.gov)
Through February 11, 2016, SCAQMD received over 2340 complaints (see detail here) regarding odors from the leak. (aqmd.gov)
The aerial map shows the general location of odor complaints received by SCAQMD and the location of air samples taken by SCAQMD inspectors during complaint investigation activities (see complaint air sampling data ). (aqmd.gov)
For comparison, we also sampled for H 2 S, formaldehyde, and VOCs in two nearby businesses where there had been no odor complaints. (cdc.gov)

The last thing you want is for potential buyers to be greeted by unpleasant odors that can deter their interest. (petodorremovalservice.com)
This surveillance case definition refers to any acute adverse health effect resulting from exposure to a pesticide product (defined under the Federal Insecticide Fungicide and Rodenticide Act [FIFRA]3) including health effects due to an unpleasant odor, injury from explosion of a product, inhalation of smoke from a burning product, and allergic reaction. (cdc.gov)

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Leak detection systems (LDS) help pipeline controllers find and localize leaks, as they provide alarms so controllers are notified if something goes wrong, and display data to inform decision-making. (creativesafetysupply.com)

Tastes and Odors in Water Supplies - A Review" (PDF). (wikipedia.org)

The receptors AgOR1 and AgOR2, as well as the binding protein AgOBP1, have been implicated in the recognition of human host odors. (ijbs.com)
Researchers explore the triggers for specific odor receptors and find no two people smell things the same way. (neurosciencenews.com)
Researchers discover odor receptors in the lungs. (neurosciencenews.com)

Then, they used machine learning to create a library of eight smells, including geranium, lemon and marzipan, and two mixtures of different odors. (israel21c.org)

With no detectable odor, the buyers saw no reason to request a pet odor inspection, believing the home to be in pristine condition due to the fresh paint and new carpet. (petodorremovalservice.com)

Urine and serum specimens of all eight cases showed CTX below the detection limit. (who.int)

This approach not only provides suggestions on gathering information, but also offers a process to characterize the odor offensiveness using frequency, duration, and intensity of the odor. (cdc.gov)

The researchers connected locust antennas to technology known as EAG, which records the electrical signals received from the locust antenna in response to a variety of odors. (israel21c.org)
The researchers concluded that bio-hybrid sensors - which combine animal biological sensors with electronic components to achieve maximum detection and classification - "demonstrate] a principle that can be applied to other senses, such as sight and touch. (israel21c.org)
Stowers researchers present a new model for how the brain is organized to process odor information. (neurosciencenews.com)
Researchers report it takes less than a tenth of a second for mice to distinguish between different odors. (neurosciencenews.com)

the first is the minimum concentration at which an odor can be detected without any requirements to identify or recognize the stimulus, while the second is the minimum concentration at which a stimulus can be identified or recognized. (wikipedia.org)

The samples were analyzed using high performance liquid chromatography/mass spectrometry (HPLC/MS) detection according to NIOSH Method 2016. (cdc.gov)
and 150 mg Carboxen 1003), were collected at a nominal flow rate of 50 mL/min and then qualitatively analyzed by NIOSH Method 2549 using gas chromatography and mass spectrometry (GC/MS) detection. (cdc.gov)

Identify a One Health approach strategy for prevention, detection, or response to public health threats. (cdc.gov)
This discovery could prove to be an early detection strategy for dementia and aid in the prevention and treatment of the disease. (healthstatus.com)
OELs have prevention of irritation or odor as their with some type of significant or severe adverse re- primary goal (Paustenbach, 2000). (cdc.gov)
Subject matter experts from multiple sectors present critical zoonoses prevention, detection, and response topics. (cdc.gov)

The concentration of an odor above a food is dependent on its solubility in that food and its vapor pressure and concentration in that food. (wikipedia.org)
At a given concentration, one person may smell and recognize the odor, while another person may barely notice it. (cdc.gov)

We are THE original leak detection specialists. (americanleakdetection.com)

Prior work has demonstrated canine search behavior and performance declines when challenged with infrequent target odors. (cabi.org)
Through a series of experiments, they analyzed how locusts' brains reacted to various odors and the behavior exhibited in response. (neurosciencenews.com)

This study investigated the odor perceptions of several essential oils used in aromatherapy with emotion regulation functions among college students. (frontiersin.org)

In our behavioral field tests, we showed that male bees learn the odor bouquets of individual flowers during mating attempts and recognize them in later encounters. (bioone.org)

Pronounced aromatic carboxylic acid detection using a layer-by-layer mesoporous coating on optical fibre long period grating Sensors and Actuators B: Chemical. (nottingham.ac.uk)

2 An extensive study, using a population of both Caucasian and African-American adults verified that poor odor detection may be linked to the onset of Alzheimer's. (healthstatus.com)

A key brain region, the mushroom body, integrates olfactory information and assigns values to odors, but the link to motor actions was unclear. (neurosciencenews.com)

Addressing pet odor disclosure early, before closing escrow, prevents complications and ensures a seamless transaction for everyone involved. (petodorremovalservice.com)
Intranasal swelling or other obstruction prevents odors from gaining access to the olfactory area. (msdmanuals.com)

Chloropicrin is a colorless-to-light green oily liquid with an intense and penetrating odor. (medscape.com)

Of centrations is difficult for odors and sensory irritants the 600 substances for which an OEL has already because some chemicals have odors that warn of been established, 66% are sensory irritants (Kurtz, their presence before irritation is produced. (cdc.gov)

Pet Odor Home Inspection and Pet Odor Inspection services can thoroughly assess the extent of pet-related odors and provide valuable insights for remediation. (petodorremovalservice.com)
That's why it's important to have a thorough inspection conducted to identify any pet odor damage. (petodorremovalservice.com)
Instead of relying on temporary solutions like air fresheners and open windows, prioritize a comprehensive inspection for pet odor damage. (petodorremovalservice.com)

We want him to associate the odors of C. diff to what he really wants, which is his tug toy. (akc.org)

SIGNIFICANCE STATEMENT Rodents are olfactory specialists and can use odors to learn contingencies quickly and well. (jneurosci.org)

His work with odor mitigation strategies seeks to keep applications affordable and easily implemented and managed. (nationalhogfarmer.com)

permitting higher brain areas involved in arousal and attention to modify the detection or the discrimination of odors. (wikidoc.org)

The odor is a distinctive warning property of this liquid compound. (medscape.com)
SMELL for the distinctive, rotten-egg odor associated with natural gas. (atlantagaslight.com)

Ingestion of elemental white or yellow phosphorus typically causes severe vomiting and diarrhea, which are both described as "smoking," "luminescent," and having a garlic-like odor. (cdc.gov)

Found to be 10,000 times more powerful than a commonly used odor-detection electronic device, the bio-hybrid "odor discriminator" was built by a research team led by doctoral student Neta Shvil of Tel Aviv University's Sagol School of Neuroscience. (israel21c.org)

Through single-cell recordings in behaving male and female C57BL/6 mice, we show here that an explicit representation for reward category emerges in the OT within minutes of learning a novel odor-reward association, whereas the pPC lacks an explicit representation even after weeks of overtraining. (jneurosci.org)
We have found that mice can readily learn to place multiple odors into rewarded and unrewarded categories. (jneurosci.org)

Officials checked the building's surroundings, collected air samples, and began to survey activity at the building, but other than the nuisance posed by the odor, no readily apparent risk to human health could be found. (cdc.gov)

The mechanisms underlying context-dependent flexibility in odor valence are not fully understood. (plos.org)

and interindividual variability in tolerance, detection and suscep- tibility with respect to setting an OEL are discussed in relation to three chemosensory models. (cdc.gov)

enhancing discrimination between odors. (wikidoc.org)

It is not clear what the functional role of lateral inhibition would be, though it may be involved in boosting the signal-to-noise ratio of odor signals by silencing the basal firing rate of surrounding non-activated neurons. (wikidoc.org)

Detection of elemental phosphorus in environmental samples, as determined by NIOSH, and an elevated phosphorus level in food, as determined by FDA, might also indicate that an exposure has occurred. (cdc.gov)

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In 1999, a retrospective case-detection survey was conducted to identify potential human anthrax cases associated with the incident, but none were found. (cdc.gov)

Physiologic evidence suggests that an important transformation in odor coding occurs in pPC and OT during sensorimotor decision-making. (jneurosci.org)
1987). Furthermore, of the numerous chemicals that chemicals, their odor may only be detected after se- are in need of OELs, the odorous or irritating chem- vere irritation occurs. (cdc.gov)

Over the last century, innovative engineers and scientists have been focused on solving a range of problems associated with measurement and control of odor. (ibecbarcelona.eu)
In this article, we summarize early work in the 20th Century that served as the foundation upon which we have been building our odor-monitoring instrumental and measurement systems. (ibecbarcelona.eu)

With I Find Leak's proprietary sewer gas smell detection services we can pinpoint the location of sewage gas smell in your sewer pipe / sanitary system without causing a great deal of damage to your property. (ifindleaks.com)
We send two technicians to every sewer gas smell detection job. (ifindleaks.com)

However, there were no significant gender differences in most of the odor perceptions. (frontiersin.org)

Detection dogs have demonstrated reduced performance in operational settings when required to search in an environment where few to no target odors are present. (cabi.org)
AKC Scent Work is a very popular sport in which dogs use their noses to search out specific odors. (akc.org)

The purpose of this study was to evaluate whether performance could be maintained in a low target odor prevalence context by explicitly training dogs through progressively. (cabi.org)
3 The study verified that those with poor odor detecting skills were at least twice as likely to have gotten the disease than those with good odor-detecting skills. (healthstatus.com)

It is based on the work of professional detection dogs (such as drug dogs). (akc.org)
We also sent each office employee a survey asking if he or she smelled an odor while at work and if he or she had health concerns associated with this odor. (cdc.gov)

Individuals may also respond differently to the same odor. (cdc.gov)
These firsthand accounts illustrate the emotions and experiences of individuals who unknowingly bought homes with concealed pet odor issues. (petodorremovalservice.com)

Anatomy11

Organisms2

Diseases1

Chemicals and Drugs14

Analytical, Diagnostic and Therapeutic Techniques and Equipment15

Psychiatry and Psychology14

Phenomena and Processes9

Disciplines and Occupations1

Information Science3

Health Care5

Ability to detect odors2

Odorant7

Respond to odors2

Sensitivity2

Detect4

Threshold13

Compounds5

Olfactory system2

Perception10

Amine1

Thresholds4

Complaints7

Unpleasant2

Leaks7

Tastes1

Receptors3

Mixtures1

Detectable1

Below the detection1

Intensity1

Researchers4

Stimulus1

Chromatography2

Prevention4

Concentration2

Leak detection specialists1

Behavior2

Aromatherapy1

Bees1

Sensors1

Onset1

Mushroom1

Prevents2

Oily liquid1

Substances1

Inspection3

Associate1

Specialists1

Strategies1

Arousal1

Distinctive2

Severe1

Commonly1

Mice2

Readily1

Understood1

Variability1

Discrimination1

Signals1

Samples1

American Leak Dete8

Identify1

Occurs2

Measurement2

Smell detection2

Gender1

Search2

Study2

Work2

Individuals2