Olfactometry: Procedures for measuring a response to odorants.Odors: The volatile portions of substances perceptible by the sense of smell. (Grant & Hackh's Chemical Dictionary, 5th ed)Rhinomanometry: Technique for measuring air pressure and the rate of airflow in the nasal cavity during respiration.Smell: The ability to detect scents or odors, such as the function of OLFACTORY RECEPTOR NEURONS.Olfaction Disorders: Loss of or impaired ability to smell. This may be caused by OLFACTORY NERVE DISEASES; PARANASAL SINUS DISEASES; viral RESPIRATORY TRACT INFECTIONS; CRANIOCEREBRAL TRAUMA; SMOKING; and other conditions.Sensory Thresholds: The minimum amount of stimulus energy necessary to elicit a sensory response.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Olfactory Perception: The process by which the nature and meaning of olfactory stimuli, such as odors, are recognized and interpreted by the brain.Olfactory Pathways: Set of nerve fibers conducting impulses from olfactory receptors to the cerebral cortex. It includes the OLFACTORY NERVE; OLFACTORY BULB; OLFACTORY TRACT; OLFACTORY TUBERCLE; ANTERIOR PERFORATED SUBSTANCE; and OLFACTORY CORTEX.Olfactory Receptor Neurons: Neurons in the OLFACTORY EPITHELIUM with proteins (RECEPTORS, ODORANT) that bind, and thus detect, odorants. These neurons send their DENDRITES to the surface of the epithelium with the odorant receptors residing in the apical non-motile cilia. Their unmyelinated AXONS synapse in the OLFACTORY BULB of the BRAIN.Olfactory Bulb: Ovoid body resting on the CRIBRIFORM PLATE of the ethmoid bone where the OLFACTORY NERVE terminates. The olfactory bulb contains several types of nerve cells including the mitral cells, on whose DENDRITES the olfactory nerve synapses, forming the olfactory glomeruli. The accessory olfactory bulb, which receives the projection from the VOMERONASAL ORGAN via the vomeronasal nerve, is also included here.Animal Testing Alternatives: Procedures, such as TISSUE CULTURE TECHNIQUES; mathematical models; etc., when used or advocated for use in place of the use of animals in research or diagnostic laboratories.Animal Welfare: The protection of animals in laboratories or other specific environments by promoting their health through better nutrition, housing, and care.Refuse Disposal: The discarding or destroying of garbage, sewage, or other waste matter or its transformation into something useful or innocuous.Incineration: High temperature destruction of waste by burning with subsequent reduction to ashes or conversion to an inert mass.Solid Waste: Garbage, refuse, or sludge, or other discarded materials from a wastewater treatment plant, water supply treatment plant, and air pollution control facility that include solid, semi-solid, or contained material. It does not include materials dissolved in domestic sewage, irrigation return flows, or industrial discharges.Industrial Waste: Worthless, damaged, defective, superfluous or effluent material from industrial operations.Dioxins: Chlorinated hydrocarbons containing heteroatoms that are present as contaminants of herbicides. Dioxins are carcinogenic, teratogenic, and mutagenic. They have been banned from use by the FDA.Coal Ash: Residue generated from combustion of coal or petroleum.Swine: Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).Schools, Veterinary: Educational institutions for individuals specializing in the field of veterinary medicine.IowaSwine Diseases: Diseases of domestic swine and of the wild boar of the genus Sus.Fishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Fish Products: Food products manufactured from fish (e.g., FISH FLOUR, fish meal).Food Quality: Ratings of the characteristics of food including flavor, appearance, nutritional content, and the amount of microbial and chemical contamination.Histamine: An amine derived by enzymatic decarboxylation of HISTIDINE. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter.Electronics: The study, control, and application of the conduction of ELECTRICITY through gases or vacuum, or through semiconducting or conducting materials. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Receptors, Histamine H1: A class of histamine receptors discriminated by their pharmacology and mode of action. Most histamine H1 receptors operate through the inositol phosphate/diacylglycerol second messenger system. Among the many responses mediated by these receptors are smooth muscle contraction, increased vascular permeability, hormone release, and cerebral glyconeogenesis. (From Biochem Soc Trans 1992 Feb;20(1):122-5)Histamine Release: The secretion of histamine from mast cell and basophil granules by exocytosis. This can be initiated by a number of factors, all of which involve binding of IgE, cross-linked by antigen, to the mast cell or basophil's Fc receptors. Once released, histamine binds to a number of different target cell receptors and exerts a wide variety of effects.Air Pollution: The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.RecQ Helicases: A family of structurally-related DNA helicases that play an essential role in the maintenance of genome integrity. RecQ helicases were originally discovered in E COLI and are highly conserved across both prokaryotic and eukaryotic organisms. Genetic mutations that result in loss of RecQ helicase activity gives rise to disorders that are associated with CANCER predisposition and premature aging.Industry: Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.Coreopsis: A plant genus of the family ASTERACEAE that contains phenyl propanoids.Genista: A plant genus of the family FABACEAE. The common name of broom may be confused with Scotch Broom (CYTISUS) or Butcher's Broom (RUSCUS) or Desert Broom (BACCHARIS) or Spanish Broom (SPARTIUM) or Brome (BROMUS).Taste Buds: Small sensory organs which contain gustatory receptor cells, basal cells, and supporting cells. Taste buds in humans are found in the epithelia of the tongue, palate, and pharynx. They are innervated by the CHORDA TYMPANI NERVE (a branch of the facial nerve) and the GLOSSOPHARYNGEAL NERVE.Tea: The infusion of leaves of CAMELLIA SINENSIS (formerly Thea sinensis) as a beverage, the familiar Asian tea, which contains CATECHIN (especially epigallocatechin gallate) and CAFFEINE.Isatis: A plant genus of the family BRASSICACEAE that is an ingredient of the preparation PC-SPES that is used to treat PROSTATIC HYPERPLASIA.United States Health Resources and Services Administration: A component of the PUBLIC HEALTH SERVICE that provides leadership related to the delivery of health services and the requirements for and distribution of health resources, including manpower training.Taste: The ability to detect chemicals through gustatory receptors in the mouth, including those on the TONGUE; the PALATE; the PHARYNX; and the EPIGLOTTIS.BelgiumHistory, 20th Century: Time period from 1901 through 2000 of the common era.Marfan Syndrome: An autosomal dominant disorder of CONNECTIVE TISSUE with abnormal features in the heart, the eye, and the skeleton. Cardiovascular manifestations include MITRAL VALVE PROLAPSE, dilation of the AORTA, and aortic dissection. Other features include lens displacement (ectopia lentis), disproportioned long limbs and enlarged DURA MATER (dural ectasia). Marfan syndrome is associated with mutations in the gene encoding fibrillin, a major element of extracellular microfibrils of connective tissue.Promoter Regions, Genetic: DNA sequences which are recognized (directly or indirectly) and bound by a DNA-dependent RNA polymerase during the initiation of transcription. Highly conserved sequences within the promoter include the Pribnow box in bacteria and the TATA BOX in eukaryotes.Hospitals, University: Hospitals maintained by a university for the teaching of medical students, postgraduate training programs, and clinical research.Base Sequence: The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.Eye Abnormalities: Congenital absence of or defects in structures of the eye; may also be hereditary.Alcoholic Beverages: Drinkable liquids containing ETHANOL.Apium graveolens: A plant species of the family APIACEAE. The stalks are a food source.IllinoisSecale cereale: A hardy grain crop, rye, grown in northern climates. It is the most frequent host to ergot (CLAVICEPS), the toxic fungus. Its hybrid with TRITICUM is TRITICALE, another grain.Flavoring Agents: Substances added to foods and medicine to improve the quality of taste.
Emission measurement can be taken by olfactometry using an olfactometer to dilute the odor sample. Olfactometry is rarely used ... Sampling from area sources. There are two main odor sampling techniques: direct and indirect odor sampling techniques. ... To collect an odor sample, the samples must be collected using specialized sample bags, which are made from an odor free ... Direct sampling. Direct refers to the placement of an enclosure on or over an emitting surface from which samples are ...
Field olfactometry can be a useful tool in validating odor complaints, or determining odor levels for various locations. Field ... must be able to provide accurate and controlled dilution of the ambient air with odorless air and present the diluted sample to ... Determination of odour concentration by dynamic olfactometry; German version EN 13725:2003. Electronic noses, GC/MS systems, ... of the relative intensity of odors allow training and automatic evaluation of expert panels The most recognised olfactometry ...
Brenes 1999 Adahchour 1999 Roberts 1996 Ong 1998 Analysis of polyphenolic compounds of different vinegar samples. Miguel ... of Heating and Cream Addition on Fresh Raspberry Aroma Using a Retronasal Aroma Simulator and Gas Chromatography Olfactometry ...
Emission measurement can be taken by olfactometry using an olfactometer to dilute the odor sample. Olfactometry is rarely used ... Sampling from area sources. There are two main odor sampling techniques: direct and indirect odor sampling techniques. ... To collect an odor sample, the samples must be collected using specialized sample bags, which are made from an odor free ... Direct sampling. Direct refers to the placement of an enclosure on or over an emitting surface from which samples are ...
Sampling. Determination of mass concentration of particulate matter (dust) at low concentrations. Manual gravimetric method. ... Determination of odour concentration by dynamic olfactometry. Determination of volume concentration of oxygen (O2). Reference ... Sample preparation, clean-up and determination. Determination of gas and particle-phase polycyclic aromatic hydrocarbons. ... Test method for determination of PM2.5 and PM10 mass is stack gases using cyclone samplers and sample dilution. Air quality- ...
... and topical samples. Focussed review articles are also welcomed. ... Samples of 100 mL of wine were adjusted to pH 3.5, 150 g of 2- ... A. Mayol and T. Acree, "Advances in gas chromatography-olfactometry," in Gas Chromatography-Olfactometry, J. Leland, P. ... One sample for each aging year (or escala) was taken of each cellar. All wines of the same aging degree were mixed and ... Chromatography-Olfactometry Study of the Aroma of Fino Sherry Wines. L. Zea, L. Moyano, M. J. Ruiz, and M. Medina ...
The 10th meeting of the working group 2 dealing with dynamic olfactometry just took place in the beautiful city of Delft, The ... The first day and part of the second day were dedicated to the discussion of sampling in olfactometry. Many of the items had ... Sampling in Olfactometry. The German PT is now open to other countries 27 July 2017 ... Is this the end of n-butanol for olfactometry?. *The 8th Meeting of the group dealing with the updating of the Norm EN 13725 ...
Find olfactometry articles on Environmental XPRT, the worlds largest environmental industry marketplace and information ... Nasal Ranger instrument and a lung technique with the dynamic olfactometry laboratory analysis of collected samples. A similar ... Collection of the samples was carried out in accordance with the methodology described in VDI 3880 and PN-EN 13725 during the ... Samples of RW were repeatedly collected from storage tanks and pits of 14 mushroom composting sites in England and Ireland. ...
9780841237131 Our cheapest price for Gas Chromatography-Olfactometry The State of the Art is $35.12. Free shipping on all ... Aroma of Roasted Sesame Oil: Characterization by Direct Thermal Desorption-Gas Chromatography-Olfactometry and Sample Dilution ... Gas Chromatography-Olfactometry The State of the Art. by Leland, Jane V.; Scheiberle, Peter; Buettner, Andrea; Acree, Terry E. ... The Identification of Aroma Compounds in Key Lime Oil Using Solid-Phase Microextraction and Gas Chromatography-Olfactometry. ...
Sampling in Olfactometry. The German PT is now open to other countries 27 July 2017 ... The 12th meeting of the working group 2 dealing with dynamic olfactometry just took place in Barcelona the 14th and 15th of ... The company Olfasense has announced the Interlaboratory Comparison for Olfactometry (ILC) based on EN 13725:2003 for 2017. ... Latest findings in the field of area source sampling. 23 June 2017 ...
Sampling in Olfactometry. The German PT is now open to other countries 27 July 2017 ... The 12th meeting of the working group 2 dealing with dynamic olfactometry just took place in Barcelona the 14th and 15th of ... Latest findings in the field of area source sampling. 23 June 2017 ... Determination of odour concentration by dynamic olfactometry took place in Berlin (Germany) at the end of August.... ...
Solid-phase microextraction and gas chromatography olfactometry analysis of successively diluted samples. A new approach of the ... Lermusieau, G.; Bulens, M.; Collin, S., Use of GC-olfactometry to identify the hop aromatic compounds in beer, J. Agric. Food ... GC-olfactometry, quantitative GC-MS, and odor evaluation of HPLC fractions, J. Agric. Food Chem., 2001, 49, 6, 2924-2929, https ... Culleré, L.; Escudero, A.; Cacho, J.; Ferreira, V., Gas chromatography-olfactometry and chemical quantitative study of the ...
Solid-phase microextraction and gas chromatography olfactometry analysis of successively diluted samples. A new approach of the ... GC-olfactometry, quantitative GC-MS, and odor evaluation of HPLC fractions, J. Agric. Food Chem., 2001, 49, 6, 2924-2929, https ... Botelho, G.; Caldeira, I.; Mendes-Faia, A.; Clímaco, M.C., Evaluation of two quantitative gas chromatography-olfactometry ... Ferreira, V.; Aznar, M.; López, R.; Cacho, J., Quantitative gas chromatography-olfactometry carried out at different dilutions ...
For each level, two blank samples of water and one diluted manure sample were presented in flasks that had been painted black ... Olfactometry. Olfactometers operate much like the Scentometer and the Nasal Ranger. The primary differences are that ... Preferably, multiple presentations (two odourless air samples and the diluted odour sample) are made at each level of dilution ... the sample odour is compared to the butanol to determine at what concentration of butanol the samples intensity is equivalent ...
... method and analyzed by GC-FID and GC-olfactometry (GC-O) techniques. In total, 98 compounds were identified in the samples, of ... Dynamic headspace-gas-chromatography-olfactometry analysis of different anatomical parts of lovage (Levisticum officinale Koch ...
Bias of Dynamic Olfactometry on the Chemical Composition of Odor Samples from Livestock Houses. / Lund Kasper, Pernille ; ...
Sub-samples were placed in a flux chamber (37°C) and VOCs collected on thermal desorption (TD) tubes followed by TD-GC-MS ... Sub-samples were placed in a flux chamber (37°C) and VOCs collected on thermal desorption (TD) tubes followed by TD-GC-MS ... Fresh feces of the four treatments (control/pomegranate; before/after weaning) were sampled twice, 2-3w before and 4-5w after ... Fresh feces of the four treatments (control/pomegranate; before/after weaning) were sampled twice, 2-3w before and 4-5w after ...
... presents a headspace sampling system designed to extract representative samples from the liquid phase. The vaporized sample can ... The odor market usually asks a spot measurement using dynamic olfactometry. This method uses human nose to quantify odor as ... It is possible to train the vigi e-nose with human sensory samples to study correlation with ASTM 679-E04 or EN 13725. ... It allows to provide a rich global fingerprint to correlate with human sensory evaluation as dynamic olfactometry as example. ...
Olfactometry remains the solid standby for hog odor detection. An estimated 200 compounds are identified as playing a role in ... Olfactometry. The old standby for hog odor detection is human assessment using an olfactometer. Samples are collected in 10- ... Olfactometry remains the best method of hog odor evaluation. Powers admits samples arent taken often enough and/or submitted ... He advises shipping two to three air samples per lagoon for best results. Round-trip shipping of odor-sampling equipment runs $ ...
Gas chromotography - olfactometry: new flavour compounds from orange essence oil. ; heat-induced changes in aroma components of ... The book examines a wide range of sample preparation methods and conditions, and offers several comparisons of chemical ... headspace sampling - a critical part in evaluating true gas phase concentrations; meat aroma analysis - problems and solutions ... representative sampling of volatile flavour compounds - the model mouth combined with gas chromatography and direct mass ...
... volatiles and their sensory characteristics of mangosteen wines prepared by Saccharomyces cerevisiae with GC-olfactometry and ... The result demonstrated that the samples could be divided into three groups that were associated closely with aroma-active ... A total of 35 odour-active compounds were identified by gas chromatography-olfactometry analysis and by the detection frequency ... volatiles and their sensory characteristics of mangosteen wines prepared by Saccharomyces cerevisiae with GC-olfactometry and ...
... uses gas chromatography-olfactometry to analyze the odors from a sample. As molecules come off the GC column, they get directed ... Sometimes panelists go back and smell a sample again to see if they missed an odor. A sample of water gets assigned an official ... One sample spiked with ethyl mercaptan, for example, had a pungent sulfur smell that created what felt like a garlic coating at ... The samples sit in covered Erlenmeyer flasks and get heated to about 45 °C to help volatilize any odor molecules. Panelists ...
... of the Aroma of Salt-fermented Anchovy Sauce Using Solid Phase Microextraction-Gas Chromatography-Olfactometry Based on Sample ... To devide the raw materials freshness levels, raw anchovy was left for 24 hours and was sampled every 4 hour(Group I-VII). As ... Linear relationship between GC response and sample concentration was observed when diluted with 23% NaCl solution, whereas not ... based on sample dilution analysis (SDA). SPME extract from carboxen/polydimethylsiloxane (CAR/PDMS) fiber was the most similar ...
... characterization by direct thermal desorption-gas chromatography-olfactometry and sample dilution analysis, Am. Chem. Soc. Symp ...
... are fully accredited for sampling a range of environments and measuring concentrations of odors using dynamic olfactometry ... Home › Environment › Air, Noise, Odor and Vibration › Field and Sampling › Odor Measurement and Monitoring ...
D6345-10 Standard Guide for Selection of Methods for Active, Integrative Sampling of Volatile Organic Compounds in Air ( ... Olfactometry Analysis and Synthetic Odor-Matching Validation ... D6803-19 Standard Practice for Testing and Sampling of Volatile ... D5791-95(2017) Standard Guide for Using Probability Sampling Methods in Studies of Indoor Air Quality in Buildings ... WK58354 Measuring Chemical Emissions from Spray Polyurethane Foam (SPF) Insulation Samples in a Large-Scale Spray Room ...
All samples were analyzed simultaneously for chemicals and odors on a GC-MS-olfactometry system. Statistical analyses were ... Gas samples were collected from the headspace of manure storage container using 85 µm Carboxen/PDMS SPME fibers at the end of ... each trial and three replicate gas samples were collected for each pig. ... All samples were analyzed simultaneously for chemicals and odors on a GC-MS-olfactometry system. Statistical analyses were ...
... dynamic olfactometry). The P25, P50 and P75 absolute thresholds of odor and sensory-irritation detection and of pyridine and ... respondents were recruited from a random sample of the Stockholm-County women population and thoroughly screened according to ...
Studied by gas chromatography-olfactometrySolid-Phase MicroextrApplication of Gas Chromatography-OlfactometryDilution AnalysisChromatographyOdorantsHeadspaceAssessorsAnalysisSPMEOdorsVolatilesLaboratoryAnalysesOlfactometerDynamicFlavour2016DeterminationConcentrationElectronic-noseMethodsFlavorMeasurements13725ConcentrationsThresholdOdorousOlfactoryEvaluationOdour-active coAnalyticalBundyPreparationOdoursFieldRepresentativeBiasChemicalMethodPanelistsSamplerAmmoniaProcedureIntensity
- To obtain air samples, a novel air sampling technology known as solid-phase microextraction (SPME) is employed. (nationalhogfarmer.com)
- Aroma-impact compounds in dried spice as a quality index using solid phase microextraction with olfactometry and comprehensive two-dimensional gas chromatography. (semanticscholar.org)
- Flavor compositions of jujube brandy from different fermentation layers were investigated using headspace-solid phase microextraction-gas chromatography-tandem mass spectrometry (HS-SPME-GC-MS), gas chromatography-olfactometry (GC-O), electronic-nose (E-nose) and electronic-tongue (E-tongue). (scialert.net)
- Abstract The active aromatic components from commercial samples of sacha inchi oil obtained from Santa Rosa de Osos (Antioquia, Colombia) crops were identified by solid phase microextraction technique coupled to gas chromatography, mass spectrometry, and olfactometry (HS -SPME-GC-MS-O). In the optimization of the extraction technique, the following conditions were defined: SPME fiber of divinylbenzene/carboxen/ polydimethylsiloxane (DVB/CAR/PDMS), extraction temperature 50 °C, and exposure time 40 min. (bvsalud.org)
- The focus is on the potentials of a group of high concentration capacity (HCC) sample preparation (Solid Phase Microextraction, SPME, Stir Bar Sorptive Extraction, SBSE and Headspace Sorptive Extraction, HSSE) and Dynamic Headspace (D-HS) techniques investigated to provide information useful for fingerprinting and profiling studies of food aroma. (unito.it)
- Two extraction techniques that avoid solvent consumption and cut down the sample preparation to a minimum - Solid Phase MicroExtraction (SPME) and Stir Bar Sorptive Extraction (SBSE) - were compared on the basis of their reproducibility and sensitivity for 16 US EPA PAH compounds. (gerstelus.com)
- Two dilution analysis methods for Gas Chromatography-Olfactometry (GCO) were used to identify the potent odorants in rye whiskey: Sample Dilution Analysis (SDA) - a novel, nonextractive, direct method of analyzing alcoholic distillates - and Aroma Extract Dilution Analysis (AEDA) - a widely used and well-understood extractive method. (illinois.edu)
- Gas chromatography-mass spectrometry-olfactometry analyses identified a total of 32 odor-active compounds, and their flavor dilution (FD) factors, ranging from 2 to 4096, were measured by aroma extract dilution analysis. (bvsalud.org)
- On the analytical side, gas chromatography-olfactometry and aroma extract dilution analysis 51 odor-active compounds were identified. (flavorchemists.com)
- Gas chromatography-olfactometry (GC-O), also known as "sniffing", is highly useful for establishing aroma profiles as it allows the discrimination of odor-active compounds in complex matrices [ 9 - 14 ]. (hindawi.com)
- Dynamic headspace-gas-chromatography-olfactometry analysis of different anatomical parts of lovage (Levisticum officinale Koch. (wur.nl)
- A total of 35 odour-active compounds were identified by gas chromatography-olfactometry analysis and by the detection frequency (DF) method. (figshare.com)
- representative sampling of volatile flavour compounds - the model mouth combined with gas chromatography and direct mass spectrometry. (routledge.com)
- The aroma-active compounds in Jinhua ham processed and stored for 9, 12, 15 and 18 months were extracted by dynamic headspace sampling (DHS) and solvent-assisted flavor evaporation (SAFE) and analyzed by gas chromatography-olfactometry-mass spectrometry (GC-O-MS). In GC-O-MS, volatile compounds were identified based on their mass spectrum, linear retention index (LRI), odor properties, or reference compound comparisons. (mdpi.com)
- The multi-dimensional-gas-chromatography mass-spectrometry-olfactometry (MDGC-MS-O) instrument breaks down the gases and chemicals in livestock and poultry odors. (nationalhogfarmer.com)
- Room air samples will also be analyzed for protein metabolite concentrations using gas chromatography/mass spectrometry. (iastate.edu)
- The characterization of individual odorants is typically achieved using high-resolution gas chromatography-olfactometry (HRGC-O) coupled to mass spectrometry (MS). The use of GC-O allows for odour-active compounds to be clearly distinguished from odourless molecules. (fraunhofer.de)
- Finally, the use of gas-chromatography (GC) combined with olfactometry (O) of the effluents of the GC helps identifying aroma activity of specific volatiles compounds, and was used during flavor evaluation of tangerines from the breeding program. (usda.gov)
- The aroma volatiles were sampled from hand-squeezed juice by the headspace SPME method, and analyzed by gas chromatography and mass spectrometry. (usda.gov)
- The data of tangerine aroma components, as well as their sensory properties by gas chromatography-olfactometry, will be fundamental for future research on food science and breeding to improve fruit quality. (usda.gov)
- forma Miyagawa-wase) peel oils, isolated by cold-pressing, was performed by gas chromatography, mass-spectrometry and gas chromatography-olfactometry (GC-O). Eighty-five volatile components were identified in each oil by GC and GC-MS. Forty-three components were detected in each oil by GC-O. The total amount of monoterpene hydrocarbons was 95.88% (Korean mandarin) and 95.29% (Japanese mandarin). (koreascience.or.kr)
- Initial flavor notes were explored through sensory work, Gas Chromatography-Olfactometry, and chemical analysis. (vt.edu)
- Gas chromatography-Olfactometry identified potent pyrazines contributing to fresh roasted peanutty aroma in fresh peanuts. (vt.edu)
- Methods applied were: membrane inlet mass spectrometry (MIMS), proton-transfer-reaction mass spectrometry (PTR-MS), gold-film hydrogen sulfide (H?S) detection, all performed on site, and thermal desorption gas chromatography with mass spectrometry (TD-GC/MS) based on laboratory analyses of field samples. (ionicon.com)
- Aroma characterization of chinese rice wine by gas chromatography-olfactometry, chemical quantitative analysis, and aroma reconstitution. (levitra2020.site)
- Twenty NMVOCs were identified, including three that were also identified as odorants using thermal desorption-gas chromatography-mass spectrometry/olfactometry analysis. (qld.gov.au)
- This Work Covers Advances In Mass Spectrometry, Sample Preparation, Gas Chromatography (gc)-olfactometry, And Electronic-nose Technology For Fold, Cosmetiv, And Pharmaceutical Applications. (storedaily.com)
- Limited literature exists on rum flavor, with previous studies only evaluating one or two rum samples and only a few of those studies made use of gas chromatography-olfactometry (GC-O) to identify the odor-active components. (flavorchemists.com)
- This study reports and critically discusses the results of a systematic investigation on the effectiveness of different and complementary sampling approaches, based on either sorption and adsorption, treated as a further dimension of a two-dimensional comprehensive gas chromatography-mass spectrometry analytical platform for sensomics. (unito.it)
- Gas chromatography-olfactometry was performed by a group of eight assessors using the detection frequency methodology. (saladgaffe.ga)
- Evaluation of volatile flavour compounds from cashew apple (Anacardium occidentale L) juice by the Osme gas chromatography/olfactometry technique. (tinkturenpresse.de)
- The analysis of contaminated soil and sludge samples for semi-volatile organic compounds (SVOC) has traditionally been performed using gas chromatography/mass spectrometry (GC/MS) (EPA SW-846, Method 8270). (gerstelus.com)
- Activity‑guided screening using gas chromatography-olfactometry (GC-O) techniques is, therefore, a prerequisite to preselect the crucial compounds. (chromatographyonline.com)
- Fermentations were performed in shake or bioreactor cultures and the production of flavor compounds was analyzed by GCMS, gas chromatography-olfactometry and Spectrum Sensory Analysis. (perfumerflavorist.com)
- The project objectives were to: 1) determine odor emission rates using common protocols and standardized olfactometry methods, 2) develop a chemical library of the most significant odorants, and 3) correlate the chemical library with olfactometry results. (iastate.edu)
- The potent odorants were quantified in a sample of roasted Arabica coffee. (semanticscholar.org)
- Out of the sample preparation techniques investigated, HSSE and SBSE have shown to be really effective for sensomics studies because of their high concentration factors, providing highly representative profiles as well as analyte recovery suitable for GC-Olfactometry even with high odor threshold (OT) markers or potent odorants in sub-trace amounts. (unito.it)
- Volatiles of five different parts of lovage (leaves, stems, flowers, seeds, and roots) were isolated by dynamic headspace (DHS) method and analyzed by GC-FID and GC-olfactometry (GC-O) techniques. (wur.nl)
- Gas samples were collected from the headspace of manure storage container using 85 µm Carboxen/PDMS SPME fibers at the end of each trial and three replicate gas samples were collected for each pig. (iastate.edu)
- Analysis of the headspace above the sample (headspace-SPME) and immersion of the fiber in aqueous samples are possible. (fraunhofer.de)
- In headspace analysis a defined gas volume from the headspace of a sample is removed and injected into a GC. (fraunhofer.de)
- Typical examples of miniaturization in sample preparation techniques are micro liquid-liquid extraction (in-vial extraction), ambient static headspace and disk cartridge SPE. (gerstelus.com)
- Three trained ODP assessors, screened according to the European dynamic olfactometry standard (EN: 13725), were used for the olfactory analysis. (environmental-expert.com)
- This European Standard specifies a method for the objective determination of the odour concentration of a gaseous sample using dynamic olfactometry with human assessors and the emission rate of odours emanating from point sources, area sources with outward flow and area sources without outward flow. (silsoeodours.com)
- Dynamic Olfactometry means that we can constantly vary the dilution of the odorous air presented to the assessors. (edu.pl)
- Abstract: This paper evaluates the accuracy of the newly introduced ultra-portable olfactometer, Scentroid SM100 developed by IDES Canada Inc, with two techniques traditionally used for assessing ambient odours: Nasal Ranger instrument and a lung technique with the dynamic olfactometry laboratory analysis of collected samples. (environmental-expert.com)
- Sub-samples were placed in a flux chamber (37°C) and VOCs collected on thermal desorption (TD) tubes followed by TD-GC-MS analysis. (frontiersin.org)
- Our environmental laboratories are fully accredited for sampling a range of environments and measuring concentrations of odors using dynamic olfactometry analysis and chemical measurements. (sgs.com)
- VOC screening was performed by means of HRGC-MS analysis of samples taken at the inlet and at the outlet of the nonthermal plasma system. (hindawi.com)
- On the one hand, the instrument separates and identifies gases that are in the air, and on the other hand, we are coupling it with olfactometry analysis," says Koziel, who works with ISU's Department of Agricultural and Biosystems Engineering, focusing on air quality and livestock odor research. (nationalhogfarmer.com)
- Researchers in Germany have developed a using GC-MS and olfactometry combined with linear discriminant analysis method to classify samples of virgin rapeseed oil based on sensory qualities. (separationsnow.com)
- The sample is then either sent directly to the laboratory for analysis on Microanalytics' AromaTrax® GCMS-Olfactometry System-or in situations with longer storage requirements-transferred first to an adsorption tube. (ai-online.com)
- After the collection of the sample, and within the first 30 minutes, the sample is easily transferred to an adsorption tube and prepared for transfer to the laboratory or storage area awaiting analysis. (ai-online.com)
- Now in its third generation, the Olfaktomat-n represents the cutting edge olfactometer for presenting odour samples for olfactometry analysis. (edu.pl)
- For our VOC analysis by GC/MS TD a sample is collected into a gas bag and upon receipt pre-concentrated onto a thermal desorption tube. (conceptlifesciences.com)
- Several laboratories involved in the analysis of water and environmental samples have already taken up our offer of a free lunch-time introduction on the topic. (anatune.co.uk)
- Absorption of volatiles on Tenax in combination with GC analysis equipped with an olfactometry outlet (Tenax/GC-O) was also executed. (diva-portal.org)
- In this paper the potential of a newly developed thermal desorption system for direct desorption and analysis of volatiles from soil samples is discussed and demonstrated. (gerstelus.com)
- For the analysis of organic compounds in aqueous environmental matrices several sample preparation methods are used. (gerstelus.com)
- In combination with state-of-the-art analytical instrumentation, this resulted in faster analysis, higher sample throughput, lower solvent consumption, less manpower in sample preparation while maintaining or even improving sensitivity. (gerstelus.com)
- ISU researchers use SPME to evaluate the effectiveness of odor control technologies, air sampling inside swine barns and downwind from hog operations. (nationalhogfarmer.com)
- Odor samples collected on SPME are analyzed using the MDGC-MS-O system. (nationalhogfarmer.com)
- SPME is particularly useful for challenging matrices, requires little sample preparation, and can thus be easily automated. (fraunhofer.de)
- All samples were analyzed simultaneously for chemicals and odors on a GC-MS-olfactometry system. (iastate.edu)
- The new generations of dynamic dilution olfactometers quantify odors using a panel and can allow different complementary techniques: odor concentration and odor threshold determination odor suprathreshold determination with comparison to a reference gas hedonic scale assessment to determine the degree of appreciation evaluation of the relative intensity of odors allow training and automatic evaluation of expert panels The most recognised olfactometry standard is currently the EN13725 standard. (wikipedia.org)
- Using precise odor administration with olfactometry , participants were exposed to three odors (cleaning-related pleasant smell, cleaning-unrelated pleasant smell: vanillin, and odorless air). (springer.com)
- Of note, anosmia or hyposmia had been diagnosed on the basis of anamnestic information, olfactometry, or by the inability to recognize familiar odors such as coffee. (biomedcentral.com)
- In total, 98 compounds were identified in the samples, of which 41 are reported as lovage volatiles for the first time. (wur.nl)
- Samples are also analyzed for flavor quality (volatiles, sugars, acids) in order to understand the chemical drivers of liking. (usda.gov)
- In samples stored at 30°C, more volatiles and peroxides were formed and the samples exhibited darker colours. (diva-portal.org)
- Volatiles and semi-volatiles contributing to define whole and nonfat dry milk aroma have been uccessfully characterized thanks to the combination of effective and selective sampling by HCC and D-HS techniques, high separation and detection power of GC × GC-MS and suitable data elaboration (i.e. (unito.it)
- Aroma volatiles in pasteurized and reconstituted (from concentrate) Brazilian cashew apple nectars were determined using GC-MS and split, time-intensity GC−olfactometry (GC-O)/GC-FID. (tinkturenpresse.de)
- Thirty-six aroma volatiles were detected in the reconstituted sample and 41 in the pasteurized sample. (tinkturenpresse.de)
- This operation principle can also be adapted for the direct thermal desorption of volatiles within a wide boiling range directly from soil samples. (gerstelus.com)
- ISU maintains a fully staffed olfactometry laboratory and uses a regular group of area panelists. (nationalhogfarmer.com)
- Evaluation will be made using dynamic dilution triangular forced-choice olfactometry in the laboratory of Dr. Dwaine Bundy, Department of Agriculture and Biosystems Engineering at Iowa State University. (iastate.edu)
- To be classified as a field olfactometer the device must be able to provide accurate and controlled dilution of the ambient air with odorless air and present the diluted sample to the panelist at controlled and positive air flow. (wikipedia.org)
- When measuring odor with an olfactometer, panelists are exposed to the odor sample via the dilution unit of the olfactometer. (odotech.com)
- The 10th meeting of the working group 2 dealing with dynamic olfactometry just took place in the beautiful city of Delft, The Netherlands. (olores.org)
- The 13th CEN meeting of Working Group 2 of the Technical Committee 264 'Air quality - Determination of odour concentration by dynamic olfactometry' took place in Berlin (Germany) at the end of August. (olores.org)
- The EN 13725:2003, which standardizes the determination of odour concentration by dynamic olfactometry, fixes the limits for panel selection in terms of individual threshold towards a reference gas (n-butanol in nitrogen) and of standard deviation of the responses. (environmental-expert.com)
- 2016. Bias of Dynamic Olfactometry on the Chemical Composition of Odor Samples from Livestock Houses. (e-pages.dk)
- They were experimentally tested jointly for odor and sensory-irritation detection and pyridine and formaldehyde recognition using the method of constant stimuli (dynamic olfactometry). (diva-portal.org)
- Odor concentration by means of dynamic olfactometry, total organic carbon, mercaptans, NH 3 , and H 2 S were also determined in order to assess the performance of the system throughout several days. (hindawi.com)
- Dynamic olfactometry measurements carried out at different development stages of pigs showed a logical trend of the mean predicted odour emission factor with the pig weight. (ac.be)
- After appropriate validation check, the electronic nose proved to be convenient, as a complementary tool to dynamic olfactometry, to record the daily variation of the odour emission factor in the pig barn. (ac.be)
- They were working towards the next phase of updates for the European Standard EN13725 - air quality - determination of odour concentration by dynamic olfactometry. (silsoeodours.com)
- Determination of odour by dynamic olfactometry. (silsoeodours.com)
- It will be titled EN13725 - Air Quality - Determination of odour concentration by dynamic olfactometry and odour emission rate from stationary sources . (silsoeodours.com)
- Health and safety recommendations for all staff involved with the process of dynamic olfactometry. (silsoeodours.com)
- has been constructed to meet the Australian / New Zealand Standard - Stationary Source Emissions - Determination of Odour Concentration by Dynamic Olfactometry (AS/NZ 4323.3). (edu.pl)
- Samples were collected from a static flux chamber often used for obtaining samples for dynamic olfactometry. (ionicon.com)
- Correlation with reference instruments can be provided via automatic on line sampling and dynamic olfactometry or field olfactometry and a simple correlation model building. (aquagas.com.au)
- Simplex optimization of conditions for the determination of arsenic in environmental samples by using electrothermal atomic absorption spectrometry. (levitra2020.site)
- The results of present study are of great value for interested laboratories to monitor the level of Sudan red dyes in water samples or develop sensitive determination methods to monitor other pollutants at trace level in environmental waters. (springeropen.com)
- Dilution-to-threshold techniques dilute an odour sample with odourless air at a number of levels and the dilution series is presented in ascending order of odour concentration. (thepigsite.com)
- The 1st layer sample showed the highest flavor concentration and the 6th the least. (scialert.net)
- The operator then increases the concentration by diluting the sample a little less with pure air in a given, accurate ratio, and the panelists respond. (odotech.com)
- if the sample was diluted, say, 536 times, in order to reach 1 odor unit, then the sample odor concentration was 536 odor units (o.u./m3), initially. (odotech.com)
- In general, it is difficult to directly analyze the target analytes because they are present in environment at low concentration and the sample matrix are complex. (springeropen.com)
- The book examines a wide range of sample preparation methods and conditions, and offers several comparisons of chemical detector sensitivities. (routledge.com)
- This paper describes the sampling and evaluation methods for the odor and chemical measurements at two freestall dairy farms, one sow (gestation and farrowing) site, and one finishing pig facility. (iastate.edu)
- Odor and ammonia samples from agricultural fields receiving liquid dairy manure applied by surface broadcast and subsurface injection methods were collected and analyzed. (extension.org)
- The recovered sample extracts are usually concentrated under mild conditions and then analyzed using a variety of analytical methods such as GC-MS and GC-Olfactometry. (fraunhofer.de)
- Collection of the samples was carried out in accordance with the methodology described in VDI 3880 and PN-EN 13725 during the rainless weather. (environmental-expert.com)
- German version EN 13725:2003. (wikipedia.org)
- W Europie pomiary olfaktometryczne są wykonywane zgodnie z normą EN 13725:2003, w której określono wymagania stawiane olfaktometrom dynamicznym - urządzeniom do rozcieńczania strumienia gazu zanieczyszczonego strumieniem czystego powietrza. (edu.pl)
- The equipment and methodology complies with stringent national and international standards, such as the Dutch standard NVN2820 'Olfactometry' and CEN 13725: 2003. (edu.pl)
- Das Olfaktometer TO 8 erfüllt die Voraussetzungen als Verdünnungseinrichtung zur olfaktometrischen Messung nach DIN EN 13725:2003 (D) und versetzt Sie in die Lage, auf dem Weg der dynamischen Olfaktometrie eine Geruchsprobe vollständig zu beschreiben.So ermöglicht das TO 8 neben der Bestimmung der Geruchsstoffkonzentrationdie Bestimmung der Geruchsintensität und der hedonischen Wirkung. (edu.pl)
- Its instrumental performance exceeds the requirements in both Australian and New Zealand AS/NZS 4323.3:2001 standard and the European EN 13725:2003 standard. (edu.pl)
- In that regard, improvement in instrument sensitivities will enable researchers to better characterize air samples and predict odor nuisance potential based on concentrations of specific compounds that are present. (nationalhogfarmer.com)
- This technology allows researchers to sample very low concentrations of odorous gases," observes Koziel. (nationalhogfarmer.com)
- Manure samples from each manure pit, taken in the same week as air samples, were analysed for volatile fatty acids (VFAs), indolic, phenolic, sulphurous compounds, ammonium nitrogen and total nitrogen concentrations. (wur.nl)
- The first few levels include the sample diluted with a large amount of odourless air so evaluation can begin below the threshold of detection. (thepigsite.com)
- The method is based on dilution of an odour sample to the odour threshold (the point at which the odour is only just detectable to 50 % of the test panel). (conceptlifesciences.com)
- I think we have come a long way using olfactometry working with the 150-200 odorous compounds in and around livestock facilities," he says. (nationalhogfarmer.com)
- The challenge has always been two-fold-how to capture and transport a representative sample of the odorous air for testing, and then, how to identify the specific compounds that are most responsible for causing the malodor. (ai-online.com)
- In the olfactometry testing procedure, a diluted odorous mixture and an odour-free gas (as a reference) are presented separately from sniffing ports to a group of panel members, who are housed in an odour-neutral room. (conceptlifesciences.com)
- Simulated odorous gas for test was prepared by mixing fresh air and an odorous gas drawn from an oven in which a sample of rubber powder was kept either at 160°C (for a thermal plastic rubber) or 200°C (for a thermal setting rubber). (aaqr.org)
- Another patent application would protect a method for sampling aromatic compounds to determine their chemical composition and a person's olfactory response to segments of the aromatic compound. (ipwatchdog.com)
- The results indeed showed that, in VR only, the cleaning-related smell elicited faster and more energetic cleaning behavior on a custom-designed cleaning task, and faster and more voluminous olfactory sampling compared with controls (vanillin, air). (springer.com)
- However, our sample size was relatively small, and our study was only powered to identify genetic markers with strong effects on olfactory sensitivity. (peerj.com)
- She presented a theoretical model for the evaluation of emissions from liquid and solid passive areas which can be used to define a benchmark approach for the sampling system on passive area sources. (olores.org)
- Olfactometry remains the best method of hog odor evaluation. (nationalhogfarmer.com)
- Animals will be housed separately, grouped by diet to allow for collection of room air samples for odor evaluation. (iastate.edu)
- Within 24 hours of collection, a group of panelists are sequestered in a room where they sniff air samples diluted with odor-free air at three-second intervals, explains ISU animal science professor Dwaine Bundy. (nationalhogfarmer.com)
- Bundy started work with olfactometry in the early 1990s. (nationalhogfarmer.com)
- Bundy is exploring using an equilibrium chamber to measure gases given off right over top of the lagoon and then analyzing samples using olfactometry. (nationalhogfarmer.com)
- Also, an autosampler system allows reagents and standards to be added and other sample preparation steps automated. (fraunhofer.de)
- For sample preparation, automation may well be important to you and you will certainly benefit from the great flexibility the GERSTEL MultiFlex MPS gives you. (anatune.co.uk)
- I aimed to provide an understanding of sampling bias and provide practical advice to minimize bias either before or after data collection. (akjournals.com)
- I used 10×10 km 2 UTM grid data for 121 land snail species to account for geographic and taxonomic sampling bias in Hungary. (akjournals.com)
- Understanding causes of sampling bias may help to reduce its effects in ecological, biogeographical and conservation biological applications, and help to guide future research. (akjournals.com)
- Persons with self-reported chemical sensitivity (CS-special persons and CS persons), their non-CS controls and "typical" respondents were recruited from a random sample of the Stockholm-County women population and thoroughly screened according to self-reported sensitivities. (diva-portal.org)
- Odor and chemical samples were collected in Tedlar™ bags and sorbent tubes, respectively at barn inlet and exhaust locations using the sophisticated NAEMS gas sampling systems. (iastate.edu)
- Twister® or Stir-Bar Sorptive Extraction is an extraction method whereby a magnetic stirrer bar coated with sorbents stirs a liquid sample during the extraction process. (fraunhofer.de)
- Finally, model solutions based on the quantification were constructed and compared to authentic whiskey samples using a difference test: the R-Index by Rating method. (illinois.edu)
- This method relies on the extraction of contaminants from the samples utilizing a variety of organic and chlorinated solvents. (gerstelus.com)
- He paused from recording the other panelists' descriptions, went to a fume hood, and pulled out the Erlenmeyer flask containing the sample in question. (acs.org)
- In these tests, 50 to 60 panelists are giving their opinion (liking) about the samples. (usda.gov)
- The operator keeps reducing the odor sample dilution until half of the panelists indicate that they can smell the odor, but the other half still cannot. (odotech.com)
- Sampling intensity corrected for species richness varied significantly among regions, although regions were not good predictors of sampling intensity. (akjournals.com)
- Residuals were significantly autocorrelated in 15 km distance, indicating small scale heterogeneity in sampling intensity compared to species richness. (akjournals.com)
- Sampling coverage and intensity were higher close to human settlements and sampling intensity was higher within protected areas than outside. (akjournals.com)
- Commonness of species was positively associated with sampling intensity, while some rare species were over-represented in the records. (akjournals.com)