Nighttime MTSOA normalized by total monoterpene concentration was found to exhibit good correlation (r2 = 0.69, n = 13) with the fraction of monoterpene oxidation by NO3 (fMT+NO3) over various nights (Fig. Major OA components in this data have been identified as SOA produced predominantly through BVOC oxidation, including pONs (18, 19) and multifunctional acids and hydroperoxides (24). Get article recommendations from ACS based on references in your Mendeley library. Dysphania ambrosioides 4C), suggesting that daytime MTSOA is highly related to NOx processing. J Pharmacogn Phytochem 2:12–18, Petasch J, Disch ME, Markert S, Becher D, Schweder T, Huttel B, Reinhardt R, Harder J (2014) The oxygen-independent metabolism of cyclic monoterpenes in Castellaniella defragrans 65Phen.

Filter samples from prior US EPA sesquiterpene oxidation experiments (28, 29), including β-caryophellene, α-humulene, α-cedrene, β-farnesene, α-copaene, and aromadendrene (irradiation in the presence of NOx and ozonolysis), were also analyzed by GC×GC. This difference suggests a large portion of the observed nighttime MTSOA must be from ozonolysis or another unrecognized process, although the reason for its enhancement with fMT+NO3 remains elusive. (A) Organic species measured by GC×GC with x axis first dimension retention in n-alkane based index and y axis second dimension retention in time (RT2). Res Pharm Sci 11(4):349–354, Cinici E, Dilekmen N, Kutlu Z, Dincer B, Cinici O, Balta H, Calik I (2019) Carvone protects against paclitaxel-induced retinal and optic nerve cytotoxicity: a histopathological study. The US EPA through its Office of Research and Development partially funded and collaborated in the research described here. They include unsaturated hydrocarbons and their oxidation products as alcohol, aldehydes, ketones, and rarely ethers. Google Scholar, Lasarte-Cia A, LozanoT Pérez-González M, Gorraiz M, Iribarren K, Hervás-Stubbs S, Sarobe P, Rabal O, Cuadrado-Tejedor M, García-Osta A, Casares N, Lasarte JJ (2018) Immunomodulatory properties of carvone inhalation and its effects on contextual fear memory in mice.

The results of the GC–MS analysis showed that 88.09% of limonene was oxidized by oxygen, leading to the formation of six oxygenated derivatives mainly alcohols and ketones. Deciphering the composition, origins, and formation mechanisms of organic aerosol (OA) is crucial to unraveling its impacts on climate and human health (4, 5). designed research; H.Z., L.D.Y., B.H.L., D.R.W., G.I.-V., J.H.O., M.L., T.E.K., M.R.B., A.L.H., W.A.L., K.S.D., M.J., H.O.T.P., W.H., D.A.D., P.C.-J., J.L.J., H.G., R.J.W., J.d.G., A.R.K., E.S.E., W.B., C.M., F.D.L.-H., A.L., N.M.K., K.R.W., J.A.T., and A.H.G. Historical data from summertime Centreville, AL show that significant decreases in NOx levels have occurred in the past 15 y, with associated decreases of OA, consistent with the trend in the relationship between MTSOA and oxidized NOx reported here (20). The tendency seems to allow miniaturized organisms to pack enough cells into a tiny form to build a complex physiology.

44 and 45) and oxidized OA (2), beyond that which can be explained by isoprene SOA and biomass burning OA.

(B) Diurnal pattern of monoterpene bimolecular RO2 loss. Xu et al. OA molecular-level measurements.

Biosci Rep 38(6):20181253–20181264, Thomsett MR, Moore JC, Buchard A, Stockman RA, Howdle SM (2019) New renewably-sourced polyesters from limonene-derived monomers. 1) to access to their structural analogues such as the dehydrogenation of cis-dihydrocarvone and the oxidation of cis- and trans-carveol in order to afford carvone. Google Scholar, Yu L, Yan L, Sun Z (2017) D-Limoneme exhibits anti-inflammatory and antioxidant properties in an ulcerative colitis rat model via regulation of iNOS, COS-2, PGE2 and ERK signaling pathways. and A.H.G. E-mail:  [email protected].

(A) Diurnal pattern of monoterpene loss by O3, OH, and NO3 oxidation. Huthig, Heidelberg, Liu H, Chen BS, Ribeiro de Souza FZ, Liu L (2018) A comparative study on asymmetric reduction of ketones using the growing and resting cells of marine-derived fungi.

During the summertime Southern Oxidant and Aerosol Study (SOAS) campaign in the southeastern US, the AMS–PMF-resolved isoprene secondary OA (SOA) combined with biomass burning OA together account for about 30% of total fine OA mass (16, 17). Chemical compositions by LC-MS/MS and GC-MS and biological activities of Chenopodium album subsp. Limonene (4-isopropenyl-1-methylcyclohexene) is a natural monocyclic monoterpene very attractive, renewable resource [1] and the most abundant structure and it is widely available as a hydrocarbon monoterpene in the world belonging to the family of terpenoids which represent the largest class of secondary plant metabolites. To what extent can biogenic SOA be controlled? 4 A and B). Monoterpenes resulting from the combination of two and sesquiterpenes from three branched, unsaturated C 5 units (isoprene) represent a large class of natural products with a wide range of biological activities. Article 

The possibility that these CIMS-measured compounds assigned to MTSOA overlap with chemicals derived from other sources [e.g., levoglucosan, C6H10O5, from biomass burning, or sesquiterpene oxidation, or accretion products from isoprene oxidation (26)] cannot be ruled out. GC–MS analyses were achieved with the help of a Hewlett-Packard 5972 MSD System.

For that, we started with a negative assay without fungi but in the presence of oxygen leading to six oxygenated monoterpenes. (D) Correlations of nighttime (2000–0400 hours) MTSOA (left y axis, 1σ) and total monoterpene-produced pONs (MT-pONs, right y axis, 1σ) normalized by monoterpenes with fMT+NO3.

A new chloro-monoterpene from the mangrove endophytic fungus 16 publications. A conidial suspension of the tested fungi was prepared (104–105 CFU/mL) and added to PDA medium (for phytopathogenic strains) cooled at 45 °C and supplemented with streptomycin sulfate (300 mg/mL). Allured Publishing Co., Carol Stream, Shibamoto T (1987) Capillary gas chromatography in essential oil analysis. PubMed Central  As shown in Fig. Since MTSOA formation chemistry pathways are very different during daytime and nighttime, data are separated further to examine MTSOA formation mechanisms at different times.

In addition, α-pinene ozonolysis chamber experiments were conducted at University of Washington with on-line measurements by CIMS. As shown in Fig. Analytes were separated by 2D GC and detected using HTOF-MS. Samira Boutkhil, Mostafa El Idrissi, Ali Amechrouq, Abderraouf Chbicheb, Said Chakir, Khalid EL Badaoui.

Study of the Performance of the Organic Extracts of

Good agreement (except for 06/19–06/22, shown in gray symbols) suggests the sum of speciated anthropogenic POA and SOA accounts for most Cfossil mass and the remaining OA are dominated by modern carbon. Abou El-Hamd H. Mohamed, Naglaa S. Mohamed, Ahmed R. Hamed, Mohamed-Elamir F. Hegazy.

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