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174 results for “volatile compounds”
Data from: QTL mapping of volatile compound production in Saccharomyces cerevisiae during alcoholic fermentation
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Data from: Allelopathic effects of volatile organic compounds released from Pinus halepensis needles and roots
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Interfacial photochemistry of biogenic surfactants: a major source of abiotic volatile organic compounds?
<p> </p> <p>Electronic supplementary Information to the Faraday Discussions article:</p> <p>Interfacial photochemistry of biogenic surfactants: a major source of abiotic volatile organic compounds?</p> <p>https://doi.org/10.1039/C7FD00022G</p>
Figure 4 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Figure 4 Non-metric multidimensional scaling ordination (NMDS) of floral scent profiles for Rhamnus alaternus (violet and empty circles), Rhamnus × bermejoi (blue and half black circles) and Rhamnus ludovici-salvatoris (green and black points).
Figure 3 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Figure 3 VOCs similarity histogram of Rhamnus alaternus (violet), Rh. × bermejoi (blue) and Rh. ludovici-salvatoris (green). Colour intensity is related to the level of presence of a component in each sample.
Figure 2 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Figure 2 Location of the Rhamnus populations included in the study. (See Suppl. material 1 for population abbreviations). Rh. alaternus open squares; Rh. ludovici-salvatoris filled triangles; Hybrids filled circle.
Figure 1 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Figure 1 Inflorescences, flowers and major pollinator (Apis mellifera) of RhamnusA–CRh. alaternusD, ERh. ludovici-salvatorisFRh. × bermejoiG leaves of the three species.
Supplementary material 2 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Floral scent chemistry
Supplementary material 1 from: Llorens L, Ferriol P, Tomàs J, García MT, Gil L (2023) Can floral volatile organic compounds contribute to the taxonomy of the Rhamnus sect. Alaternus? Italian Botanist 16: 149-164. https://doi.org/10.3897/italianbotanist.16.116255
Geographical location and sexuality of Rhamnus sampled plants
Fig. 1. Structures for compounds 1–5 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 1. Structures for compounds 1–5.
Measurements of volatile organic compounds in the Northern Colorado Front Range in 2023
<p>This dataset was collected by Colorado State University (CSU) students during the spring 2023 and fall 2023 semesters as part of a course in the Department of Atmospheric Science (ATS-716: Air Quality Characterization). Measurements of volatile organic compounds (VOCs) were collected in Northern Colorado, using a low-cost sensor called SENSIT SPOD. The SENSIT SPOD sensor package combines wind field and air pollutant concentration measurements to detect emission plumes and locate the source of those emissions. The sensor measures non-speciated, uncalibrated concentrations of a subset of VOCs. The sensor also measures temperature, relative humidity, pressure, and wind direction and speed. The SPODs were used to trigger the collection of whole air samples during periods with higher concentrations of VOCs. Air samples from the triggered canisters were analyzed at CSU using Gas Chromatography (GC) to provide a measure of approximately 50 VOCs. An integrated canister was used to measure the average concentration of approximately 50 VOCs over a one-week period. After collection, sample air in the canisters was analyzed at CSU using Gas Chromatography (GC).</p>
Intermediate volatility organic compounds (IVOCs) emissions based on source-specific emission ratios relative to non-methane volatile organic compounds (NMVOCs) give better representation of the spatial distribution of IVOCs in China
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Figure 2 from: Bonacci T, Brandmayr P, Zetto Brandmayr T, Daniela Perrotta I, Guarino S, Peri E, Colazza S (2011) Volatile compounds released by disturbed and undisturbed adults of Anchomenus dorsalis (Coleoptera, Carabidae, Platynini) and structure of the pygidial gland. ZooKeys 81: 13-25. https://doi.org/10.3897/zookeys.81.1122
Figure 2 - Light microscope: A Dorsal aspects of pygidial gland; ed, efferent duct; r, reservoir; cc, collecting canal; sl, secretory lobe (Scale bar = 0.5 mm) (not treated with potassium hydroxide) B collecting canal (Scale bar = 0.125 mm) C reservoir with smooth constriction at about one third from its hind end (Scale bar = 0.125 mm) D insertion of collecting canal (black arrow) and efferent duct (white arrow) in the reservoir (Scale bar = 0.05 mm) E collecting canal with apical ramifications (white arrows) (Scale bar = 0.05 mm) F "floret" (sensu Eisner et al. 2001) (Scale bar = 0.015 mm) (treated with potassium hydroxide).
Figure 1 from: Bonacci T, Brandmayr P, Zetto Brandmayr T, Daniela Perrotta I, Guarino S, Peri E, Colazza S (2011) Volatile compounds released by disturbed and undisturbed adults of Anchomenus dorsalis (Coleoptera, Carabidae, Platynini) and structure of the pygidial gland. ZooKeys 81: 13-25. https://doi.org/10.3897/zookeys.81.1122
Figure 1 - Gas chromatograms of volatile compounds collected from disturbed (up) and undisturbed (down) adults of Anchomenus dorsalis. 1 undecane 2 heneicosane 3 (Z)-9 - tricosene 4 tricosane. On the x axis is reported the retention time (minutes). As a stationary phase an HP5–MS capillary column was used. The GC oven temperature program was 60 °C for 5 min, than increased by 10 °C/min to 280 °C.
Figure 3 from: Bonacci T, Brandmayr P, Zetto Brandmayr T, Daniela Perrotta I, Guarino S, Peri E, Colazza S (2011) Volatile compounds released by disturbed and undisturbed adults of Anchomenus dorsalis (Coleoptera, Carabidae, Platynini) and structure of the pygidial gland. ZooKeys 81: 13-25. https://doi.org/10.3897/zookeys.81.1122
Figure 3 - Transmission electron microscope (TEM): A, collecting canal with lumen (lu); the black arrows show interstitial spaces (is) B secretory lobe with secretory lumen (sl) C vesicle (v) with microvilli (mv) D microvilli structure (mv) at highest enlargement (the white arrows show the thin lamina) and E Inner wall of the reservoir with chitinous basal lamina (la) (black arrows) and massive muscle layer around.
Metrological generation of SI-traceable gas-phase standards and reference materials for (semi-) volatile organic compounds
<p>EN 16516 sets specifications for the determination of emissions into indoor air from construction products. Reliable, accurate and SI-traceable measurement results of the emissions are the key to consumer protection. Such measurement results can be obtained by using metrologically traceable reference materials. Gas-phase standards of volatile organic compounds (VOCs) in air can be prepared by a variety of dynamic methods according to the ISO 6145 series. However, these methods are not always applicable for semi-volatile organic compounds (SVOCs) due to their high boiling point and low vapour pressure. Therefore, a novel dynamic gas mixture generation system has been developed. With this system gas-phase standards with trace level VOCs and SVOCs in air can be prepared between 10 nmol mol<sup>-1</sup> and 1000 nmol mol<sup>-1</sup>. The VOCs and SVOCs in this study have normal boiling points ranging from 146 °C to 343 °C. Metrologically traceable reference materials of the gas-phase standard were obtained by sampling of the VOC gas-phase standard into Tenax TA® sorbent material in SilcoNert® coated stainless steel tubes. Accurately known masses between 10 ng and 1000 ng per VOC were sampled. These reference materials were used to validate the dynamic system. Furthermore, the storage and stability periods of the VOCs in the reference materials were determined as these are crucial characteristics to obtain accurate and SI-traceable reference materials. In a Round Robin Test (RRT), the reference materials were used with the aim of demonstrating the feasibility of providing SI-traceable standard reference values for SVOCs for interlaboratory comparison purposes. Based on the results from the validation, the storage and stability studies and the RRT, gas-phase standards and reference materials of VOCs and SVOCs with relative expanded uncertainties between 5 % and 12 % (<em>k</em> = 2) have been developed. These reference standards can be used as calibrants, reference materials or quality control materials for the analysis of VOC emissions.</p> <p>In this repository data from the validation, the storage and stability studies and the RRT are published which is used for the manuscript "Metrological generation of SI-traceable gas-phase standards and reference materials for (semi-) volatile organic compounds" published in Measurement Science and Technology.</p> <p>The following files can be found in this repository:</p> <p>- The following files contain data from the validation.Variation1_day1, Variation1_day2, Variation1_day3, Variation2_day1, Variation2_day2, Variation2_day3, Variation3_day1, Variation3_day2, Variation3_day3, Variation4_day1 and Variation4_day2. During the validation 4 different variations have been used and these have been tested on 3 or 2 days. The data contain information about the settings to obtain the gas-phase standard, reference materials and spiked tubes and the analysis data. </p> <p>- The "ANOVA validation data" file contains the ANOVA calculations used to obtain the repeatability standard deviation and reproducibility standard deviation.</p> <p>- The figure "Chromatogram VOCs used for the validation" is a copy of a chromatogram</p> <p>- The file "Storage and stability studies data" contains formation about the settings to obtain the gas-phase standard, reference materials and spiked tubes and the analysis data. </p> <p>- The figure "Chromatogram VOCs used for the storage and stability studies" is a copy of a chromatogram.</p> <p>- The file "RRT data" contains information about the settings to obtain the gas-phase standard, reference materials and spiked tubes and the analysis data. </p> <p>- The file "Report Homogeneity RRT" is a report on the homogeneity study performed during the RRT.</p> <p>- The figure "Chromatogram VOCs used for the RRT" is a copy of a chromatogram.</p> <p>- The file "VSL-Tubes-results-RR18-a". The dataset contains the results of a round robin test which tested the proficiency to analyse volatile organic compounds (VOC) of laboratories dealing with the determination of emissions from building materials. For this analysis check the participants were asked to send own sampling tubes filled with the adsorbent Tenax TA<sup>®</sup>, which were loaded with a reference gas mixture containing the compounds: styrene [100-42-5], n-decane [124-18-5], R(+)limonene [5989-27-5], 1,2,4-trimethylbenzene [95-63-6], decamethylcyclopentasiloxane [541-02-6], dimethylphthalate [131-11-3], dibutylphthalate [84-74-2], naphthalene [91-20-3], n-hexadecane [544-76-3] and eicosane [112-95 8]. These tubes were sent back to the participants for immediate analysis. The list of compounds was disclosed in advance. For all statistical evaluations, the mean values of the laboratories were used instead of all single measurement values. <strong>Expert laboratories:</strong> Laboratories who had successfully participated in the three former round robin tests (2014; 2016; 2018) organized by BAM were defined as expert laboratories. Their reported data were used to calculate the reference mean (ref. mean) and the reference standard deviation (ref st. dev.). <strong>Reference mean:</strong> The reference mean is determined as the robust mean value using the Hampel estimator (see Section C.5.3 in ISO 13528) on the basis of the results of the expert laboratories. It is a weighted arithmetic mean, with lower weights for outlying values. <strong>Standard deviation for proficiency assessment:</strong> The reference standard deviation for proficiency assessment is determined as the robust reproducibility standard deviation according to the Q method (see Section C.5.2 in ISO 13528) based on the results of the expert laboratories.</p>
SI_III_3_Composition of Antifungal Volatile Organic Compounds in Sextonia rubra Fruits by Molecular Networks
<p>Ce document présente les données supplémentaires générées lors de l'étude de l'hydrolat de fruit de <em>S. rubra</em> par HS-GC-EI-MS.</p>
Measurements of volatile organic compounds in the Northern Colorado Front Range in 2023
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ATom: Volatile Organic Compounds (VOCs) from the TOGA instrument, Version 2
This dataset provides concentrations of volatile organic compounds (VOCs) measured by the Trace Organic Gas Analyzer (TOGA) during the four ATom campaigns. These data are relevant to the impact of human-produced air pollution on greenhouse gases and on chemically reactive gases in the atmosphere. Specific data were obtained for radical precursors, tracers of anthropogenic and biogenic activities, tracers of urban and biomass combustion emissions, products of oxidative processing, precursors to aerosol formation, and compounds important for aerosol modification and transformation. TOGA measures a wide range of VOCs with high sensitivity (ppt or lower), frequency (2-minutes), accuracy (often 15% or better), and precision (<3%).
Volatile organic compounds emitted by the biocontrol agent Pythium oligandrum contribute to ginger plant growth and disease resistance
GEO Series GSE235182. Zingiber officinale. 6 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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OpenNeuro
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