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https://www.readbyqxmd.com/read/28812956/toxicity-identification-and-evaluation-for-the-effluent-from-a-nonmetallic-mineral-mining-facility-in-korea-using-d-magna
#1
Sungjong Lee, Hongjoo Ha, JinKyung Hong, Guyoung Kang, Chunsang Hong
Industrial wastewater has attracted increasing attention in recent years because of its impact on ecosystems and human health. Whole-effluent tests are generally used to monitor toxicities of unknown chemicals and conventional pollutants from industrial effluent discharges. This study described identification evaluation (TIE) procedures to determine the acute toxicity of a nonmetallic mineral mining facility effluent that was toxic to Daphnia magna. In the characterization step (TIE phase I), toxic effects of heavy metals, organic compounds, oxidants, volatile organic compounds, suspended solids, and ammonia were screened...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28811827/pharmacodynamics-and-medicinal-chemistry-of-an-external-chinese-herbal-formula-for-mammary-precancerous-lesions
#2
Ruixue Chen, Guijuan Zhang, Yi Ma, Fengjie Bie, Hongxia Fan, Min Ma
Ruyan Neixiao Cream (RYNXC) is a traditional Chinese herbal formula for treating mammary precancerous disease. This study was carried out to investigate in vivo anticancer effect of RYNXC and multiple constituents. 32 virginal Sprague-Dawley rats were randomly divided into blank control group (BC), mammary precancer models group (MODEL), tamoxifen group (TAM), and Ruyan Neixiao Cream group (RYNXC). TAM was intervened by tamoxifen; RYNXC was intervened by Ruyan Neixiao Cream. The chromatographic separation was performed by high performance liquid chromatography (HPLC) coupled with mass spectrometry (MS)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28809809/study-of-ceo%C3%A2-modified-alni-mixed-pillared-clays-supported-palladium-catalysts-for-benzene-adsorption-desorption-catalytic-combustion
#3
Jingrong Li, Shufeng Zuo, Peng Yang, Chenze Qi
A new functional AlNi-pillared clays (AlNi-PILC) with a large surface area and pore volume was synthesized. The performance of adsorption/desorption-catalytic combustion over CeO2-modified Pd/AlNi-PILC catalysts was also studied. The results showed that the d001-value and specific surface area (SBET) of AlNi-PILC reached 2.11 nm and 374.8 m²/g, respectively. The large SBET and the d001-value improved the high capacity for benzene adsorption. Also, the strong interaction between PdCe mixed oxides and AlNi-PILC led to the high dispersion of PdO and CeO₂ on the support, which was responsible for the high catalytic performance...
August 15, 2017: Materials
https://www.readbyqxmd.com/read/28806605/phytochemistry-of-european-primula-species
#4
REVIEW
Paola S Colombo, Guido Flamini, Graziella Rodondi, Claudia Giuliani, Laura Santagostini, Gelsomina Fico
The genus Primula is the largest among the Primulaceae and is widespread mainly in the cold and temperate regions of the Northern Hemisphere. Since the beginning of the Twentieth century, several studies on the phytochemical composition of different species of Primula have been carried out. The main constituents examined were tissue and epicuticular flavonoids and saponins, which are of therapeutic significance. Only in recent years studies of the volatiles emitted by leaves and flowers have been carried out as well, but they are restricted to a small number of species...
August 11, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28805852/the-effect-of-sub-zero-temperature-on-the-formation-and-composition-of-secondary-organic-aerosol-from-ozonolysis-of-alpha-pinene
#5
K Kristensen, L N Jensen, M Glasius, M Bilde
This study presents a newly constructed temperature controlled cold-room smog chamber at Aarhus University, Denmark. The chamber is herein utilized to study the effect of sub-zero temperature on the formation and chemical composition of secondary organic aerosol (SOA) from ozone initiated oxidation of α-pinene. The chemical composition of α-pinene SOA formed from dark ozonolysis of α-pinene at 293 K and 258 K was investigated using High-Resolution Time-of-Flight Aerosol Mass Spectrometry (HR-ToF-AMS) and Ultra-High Performance Liquid Chromatography/Electrospray Ionization Quadrupole Time-of-Flight Mass Spectrometry (UHPLC/ESI-qToF-MS)...
August 14, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28804491/phylloremediation-of-air-pollutants-exploiting-the-potential-of-plant-leaves-and-leaf-associated-microbes
#6
REVIEW
Xiangying Wei, Shiheng Lyu, Ying Yu, Zonghua Wang, Hong Liu, Dongming Pan, Jianjun Chen
Air pollution is air contaminated by anthropogenic or naturally occurring substances in high concentrations for a prolonged time, resulting in adverse effects on human comfort and health as well as on ecosystems. Major air pollutants include particulate matters (PMs), ground-level ozone (O3), sulfur dioxide (SO2), nitrogen dioxides (NO2), and volatile organic compounds (VOCs). During the last three decades, air has become increasingly polluted in countries like China and India due to rapid economic growth accompanied by increased energy consumption...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28803260/microbial-volatile-compounds-alter-the-soil-microbial-community
#7
Jun Yuan, Mengli Zhao, Rong Li, Qiwei Huang, Waseem Raza, Christopher Rensing, Qirong Shen
Volatile organic compounds (VOCs) from soil bacteria are likely to have an important role in the interactions among soil microorganisms. However, their effects on the soil microbial community have not been extensively studied. In this study, the effect of bacterial VOCs generated by growing Bacillus amyloliquefaciens NJN-6 on modified MS medium on soil microbial community was evaluated. B. amyloliquefaciens NJN-6 was able to produce 48 volatile compounds as determined by solid-phase microextraction-GC/MS. MiSeq sequencing data showed that bacterial VOCs could alter the composition of both soil bacterial and soil fungal communities and could decrease the alpha-diversity of the soil microbial community...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28799051/measuring-the-internal-concentration-of-volatile-organic-compounds-in-small-organisms-using-micro-quechers-coupled-to-lvi-gc-ms-ms
#8
Denise Kurth, Martin Krauss, Tobias Schulze, Werner Brack
There is an increasing demand for analytical tools to measure the internal concentrations of xenobiotic pollutants in small organisms. Such tools are required to determine exposure in ecotoxicological studies yet avoid sophisticated clean-up and enrichment techniques or large-scale experimental design. Thus, this paper presents a modified QuEChERS method coupled to gas chromatography tandem mass spectrometry (GC-MS/MS) for small volume organic samples. Ten zebrafish (Danio rerio) embryos were exposed to a 46-compound mixture at 10 ng/mL...
August 10, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28798756/aerial-warfare-a-volatile-dialogue-between-the-plant-pathogen-verticillium-longisporum-and-its-antagonist-paenibacillus-polymyxa
#9
Daria Rybakova, Ute Rack-Wetzlinger, Tomislav Cernava, Angelika Schaefer, Maria Schmuck, Gabriele Berg
Verticillium wilt caused by Verticillium spp. results in severe yield losses in a broad range of crops. Verticillium outbreaks are challenging to control, and exacerbated by increases in soil temperatures and drought associated with global warming. Employing natural antagonists as biocontrol agents offers a promising approach to addressing this challenge. Paenibacillus polymyxa Sb3-1 was proven to reduce the growth of Verticillium longisporum during in vitro experiments and was shown to promote the growth of oilseed rape seedlings infested with V...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28796517/computational-and-experimental-investigation-of-the-detection-of-ho2-radical-and-the-products-of-its-reaction-with-cyclohexene-ozonolysis-derived-ro2-radicals-by-an-iodide-based-chemical-ionization-mass-spectrometer
#10
Siddharth Iyer, Xucheng He, Noora Hyttinen, Theo Kurtén, Matti P Rissanen
The HO2 radical is an important atmospheric molecule that can potentially influence the termination of autoxidation processes of volatile organic compounds (VOCs) that lead to the formation of highly oxygenated multifunctional compounds (HOMs). In this work, we demonstrate the direct detection of the HO2 radical using an iodide-based chemical ionization mass spectrometer (iodide-CIMS). Expanding on the previously established correlation between molecule-iodide binding enthalpy and iodide-CIMS instrument sensitivity, the experimental detection of the HO2 radical was preceded by the quantum chemical calculation of the HO2*I(-) cluster (PBE/aug-cc-pVTZ-PP level), which showed a reasonably strong binding enthalpy of 21...
August 10, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28796186/maldi-tof-ms-for-the-identification-of-cultivable-organic-degrading-bacteria-in-contaminated-groundwater-near-unconventional-natural-gas-extraction-sites
#11
Inês C Santos, Misty S Martin, Doug D Carlton, Catarina L Amorim, Paula M L Castro, Zacariah L Hildenbrand, Kevin A Schug
Groundwater quality and quantity is of extreme importance as it is a source of drinking water in the United States. One major concern has emerged due to the possible contamination of groundwater from unconventional oil and natural gas extraction activities. Recent studies have been performed to understand if these activities are causing groundwater contamination, particularly with respect to exogenous hydrocarbons and volatile organic compounds. The impact of contaminants on microbial ecology is an area to be explored as alternatives for water treatment are necessary...
August 10, 2017: Microorganisms
https://www.readbyqxmd.com/read/28795953/diagnostic-accuracy-of-breath-tests-for-pneumoconiosis-using-an-electronic-nose
#12
Pau-Chung Chen, Hsin-Yi Peng, Che-Jui Chang, Hsiao-Yu Yang
Breath analyses have attracted substantial attention as screens for occupational environmental lung disease. The objective of this study was to develop breath tests for pneumoconiosis by analysing volatile organic compounds using an electronic nose. A case-control study was designed. We screened 102 subjects from a cohort of stone workers. After excluding three subjects with poorly controlled diabetes mellitus and one subject with asthma, 98 subjects were enrolled, including 34 subjects with pneumoconiosis and 64 healthy controls...
August 10, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28794423/on-the-chemistry-of-1-pyrroline-in-solution-and-in-the-gas-phase
#13
Xiaoping Zhang, Konstantin Chingin, Dacai Zhong, Juchao Liang, Yongzhong Ouyang, Huanwen Chen
1-Pyrroline has a highly characteristic odor, which is employed by living organisms for chemical signaling and other purposes, but the mechanism whereby this odor is formed remains poorly understood. Here we used a combination of ambient mass spectrometry (AMS) and nuclear magnetic resonance (NMR) spectroscopy to experimentally address the mechanistic aspects of 1-pyrroline volatility and other controversies regarding the chemistry of this compound. Our results indicate that in solution the volatility of the monomer species is significantly higher than that of the trimer species, and 1-pyrroline is evaporated mainly in its monomer state...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28792049/a-synthetic-dodecanolide-library-for-the-identification-of-putative-semiochemicals-emitted-by-mantellid-frogs
#14
Pardha Saradhi Peram, Miguel Vences, Stefan Schulz
Aliphatic macrolides are used by various organisms as semiochemicals or pheromones, e.g. by the endemic Madagascan frog family Mantellinae. Volatile, methyl-branched aliphatic macrolides occur in various species, but their identification by MS is difficult, while isolation is not possible due to the low amounts produced. Therefore, we synthesized a library of methyl-branched 11-dodecanolides to identify unknown macrolides secreted by Gephyromantis moseri, a mantelline frog restricted to the rainforest and characterized by largely terrestrial habitats...
August 9, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28790984/acidotolerant-bacteria-and-fungi-as-a-sink-of-methanol-derived-carbon-in-a-deciduous-forest-soil
#15
Mareen Morawe, Henrike Hoeke, Dirk K Wissenbach, Guillaume Lentendu, Tesfaye Wubet, Eileen Kröber, Steffen Kolb
Methanol is an abundant atmospheric volatile organic compound that is released from both living and decaying plant material. In forest and other aerated soils, methanol can be consumed by methanol-utilizing microorganisms that constitute a known terrestrial sink. However, the environmental factors that drive the biodiversity of such methanol-utilizers have been hardly resolved. Soil-derived isolates of methanol-utilizers can also often assimilate multicarbon compounds as alternative substrates. Here, we conducted a comparative DNA stable isotope probing experiment under methylotrophic (only [(13)C1]-methanol was supplemented) and combined substrate conditions ([(12)C1]-methanol and alternative multi-carbon [(13)Cu]-substrates were simultaneously supplemented) to (i) identify methanol-utilizing microorganisms of a deciduous forest soil (European beech dominated temperate forest in Germany), (ii) assess their substrate range in the soil environment, and (iii) evaluate their trophic links to other soil microorganisms...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28789922/plant-derived-secondary-organic-material-in-the-air-and-ecosystems
#16
REVIEW
J K Holopainen, M Kivimäenpää, S A Nizkorodov
Biogenic secondary organic aerosol (SOA) and deposited secondary organic material (SOM) are formed by oxidation of volatile organic compounds (VOCs) emitted by plants. Many SOA compounds have much longer chemical lifetimes than the original VOC, and may accumulate on plant surfaces and in soil as SOM because of their low volatility. This suggests that they may have important and presently unrecognized roles in plant adaptation. Using reactive plant terpenoids as a model we propose a three-tier (atmosphere-vegetation-soil) framework to better understand the ecological and evolutionary functions of SOM...
August 5, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28783776/odorous-volatile-organic-compounds-escherichia-coli-and-nutrient-concentrations-when-kiln-dried-pine-chips-and-corn-stover-bedding-are-used-in-beef-bedded-manure-packs
#17
Mindy J Spiehs, Elaine D Berry, James E Wells, David B Parker, Tami M Brown-Brandl
Pine ( spp.) bedding has been shown to lower the concentration of odorous volatile organic compounds (VOCs) and pathogenic bacteria compared with corn ( L.) stover bedding, but availability and cost limit the use of pine bedding in cattle confinement facilities. The objectives of this study were to determine if the addition of pine wood chips to laboratory-scaled bedded packs containing corn stover (i) reduced odorous VOC emissions; (ii) reduced total ; and (iii) changed the nutrient composition of the resulting manure-bedded packs...
July 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28783535/the-individual-contribution-of-starter-and-non-starter-lactic-acid-bacteria-to-the-volatile-organic-compound-composition-of-caciocavallo-palermitano-cheese
#18
Valeria Guarrasi, Ciro Sannino, Marta Moschetti, Adriana Bonanno, Antonino Di Grigoli, Luca Settanni
The contribution of two starter (Lactobacillus delbrueckii and Streptococcus thermophilus) and nine non-starter (Enterococcus casselliflavus, Enterococcus faecalis, Enterococcus durans, Enterococcus gallinarum, Lactobacillus casei, Lactobacillus paracasei, Lactobacillus rhamnosus, Pediococcus acidilactici and Pediococcus pentosaceus) species of lactic acid bacteria (LAB) to the volatile organic compounds (VOCs) of Caciocavallo Palermitano cheese was investigated. The strains used in this study were isolated during the production/ripening of the stretched cheese and tested in a cheese-based medium (CBM)...
July 31, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28783083/fluorescent-polystyrene-films-for-the-detection-of-volatile-organic-compounds-using-the-twisted-intramolecular-charge-transfer-mechanism
#19
Mirko Borelli, Giuseppe Iasilli, Pierpaolo Minei, Andrea Pucci
Thin films of styrene copolymers containing fluorescent molecular rotors were demonstrated to be strongly sensitive to volatile organic compounds (VOCs). Styrene copolymers of 2-[4-vinyl(1,1'-biphenyl)-4'-yl]-cyanovinyljulolidine (JCBF) were prepared with different P(STY-co-JCBF)(m) compositions (m% = 0.10-1.00) and molecular weights of about 12,000 g/mol. Methanol solutions of JCBF were not emissive due to the formation of the typical twisted intramolecular charge transfer (TICT) state at low viscosity regime, which formation was effectively hampered by adding progressive amounts of glycerol...
August 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28782138/a-cautionary-note-on-the-effects-of-laboratory-air-contaminants-on-ambient-ionization-mass-spectrometry-measurements
#20
Sambhav R Kumbhani, Lisa M Wingen, Véronique Perraud, Barbara J Finlayson-Pitts
RATIONALE: Ambient ionization mass spectrometry methods are convenient, sensitive and require little sample preparation. However, they are susceptible to species present in air surrounding the mass spectrometer. This study identifies some challenges associated with the potential impacts of indoor air contaminants on ionization and analysis involving open air methods. METHODS: Unexpected effects of volatile organic compounds from floor maintenance activities on ambient ionization mass spectrometry were studied using three different ambient ionization techniques...
August 6, 2017: Rapid Communications in Mass Spectrometry: RCM
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