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Showing 1 to 17 of 17 for “"bromoform"”.
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The effect of nutrient limitation and oxidative stress on bromoform production from axenic cultures of marine diatoms
Bromoform is mainly produced naturally by marine organisms. The production by microalgae however is not well quantified, and the mechanism by which phytoplankton produce bromoform is not fully elucidated. The production of this compound at the cellular level seems to be linked to oxidative stress …
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An investigation into source and distribution of bromoform in the Southern African and Southern Ocean Marine boundry layer
Bromoform is a climatically important atmospheric trace gas. It is released by macro- and microalgae into the ocean, and rapidly transferred to the atmosphere, where bromoform undergoes rapid photolysis yielding bromine radicals. These bromine radicals are known to participate in catalytic …
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Establishing land tank cultivation of Asparagopsis taxiformis in Scotland
… of Asparagopsis sp. is a halogenated metabolite, bromoform. It is theorised that the respective life stage of different lineages of A. taxiformis produces different concentrations of bromoform and this is related to cultivation conditions. This thesis focused on vegetative growth and biochemical …
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Trihalomethane compounds in the drinking water of Kuwait: A survey from source to consumer
… (CHBrCI2), dibromochloromethane (CHBr2CI) and bromoform (CHBr3) were covered. The study clearly showed that, although considerable amounts of THM compounds did form as a result of chlorination of sea water entering the multi-stage flash (MSF) distillation plants, these plants were highly …
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Comparison of the extraction procedure toxicity test (EP) and the toxicity characteristic leaching procedure (TCLP) for the analysis of trace organic compounds in land applied municipal wastewater sludges
… added surrogate standards (1,2-dibromoethane, bromoform, 1â chlorooctane, fusarex, heptachlor, and DDT) and also qualitatively identify and evaluate unknown trace organic chemicals in domestic wastewater sludges. In order to meet the research objectives established, three small (approximately 1 …
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Gas chromatographic-electron capture analysis of disinfection byproducts from the chlorination of swimming pools and lake water
… The lake's Overton Arm showed more bromoform production and areas from Lake Mohave resembled the Boulder Basin; An extraction method was modified to isolate another group of halogenated compounds, known as haloacetic acids. Results showed that the methylation performed well however, …
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The synthesis and evaluation of valine mimic protio and halo enol lactones as human neutrophil elastase inhibitors
… 5-alkynoic acids by the bromoform reaction of the corresponding alkynoic methyl ketone, prepared by the Eschenmoser-Tanabe fragmentation. $\beta$-Methyl- and $\beta,\beta$-dimethyl-5-hexynoic acids were synthesized from commercially available isophorone and …
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The Effect of Natural Organic Matter on UV/H<sub>2</sub>O<sub>2</sub> Treatment and the Effect of UV/H<sub>2</sub>O<sub>2</sub> Treatment on Natural Organic Matter
… SDS chloroform by 7 to 13%, while 3-day SDS bromoform TTHM contribution decreased by 0.5 to 7%. GAC adsorption after UV/H<sub>2</sub>O<sub>2</sub> insignificantly increased 3-day SDS bromoform concentration from 0.01 to 0.02 μmole/L. </p><p>UV/H2O2 can be used with GAC for excellent …
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Emission of biogenic halocarbons in temperate and tropical coastal zones
… proportion of future Malaysian annual bromoform emissions.
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Dynamics and implications of ROS in marine systems
… health. I measured hydrogen peroxide and bromoform production by two seaweed species exposed to different stressors. An analysis of these signals suggests that hydrogen peroxide could serve as a non-invasive chemical signature for stress in seaweed meadows and farms. Lastly, I …
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Atmospheric volatile organic compound measurements: Distributions and effects on air quality in coastal marine, rural and remote continental environments
… (ICARTT) 2004 campaign. Elevated levels of bromoform (CHBr3) were frequently observed, with maxima of 37.9 pptv and 47.4 pptv for TF and Appledore Island (AI), respectively. During the ICARTT 2004 campaign, the average levels of CHBr3 and dibromomethane (CH2Br2) were higher at AI (CHBr3 = …
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Dynamics and Implications of ROS in Marine Systems
… health. I measured hydrogen peroxide and bromoform production by two seaweed species exposed to different stressors. An analysis of these signals suggests that hydrogen peroxide could serve as a non-invasive chemical signature for stress in seaweed meadows and farms. Lastly, I …
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Transport and Distribution of the Short-Lived Halocarbons in the Tropical Tropopause Layer in the Pacific Ocean: the Role of Convection
… of interest are methyl iodide (CH3I), bromoform (CHBr3) and dibromomethane (CH2Br2). A new NAME procedure was developed and operated successfully to provide routine simulations and near real-time products suitable for guiding the CAST, CONTRAST and ATTREX aircraft in order to achieve …
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The evaluation and comparison of the extraction procedure toxicity test and the toxicity characteristic leaching procedure for the analysis of municipal wastewater sludges
… to the test procedure. These standards were bromoform, 1-chlorooctane, DDT, ethylene dibromide (EDB, a volatile fungicide), fusarex (tetrachloronitrobenzene), and heptachlor. Control samples were run for both EP and TCLP, in addition to a sludge samples with no surrogates added. Analysis …
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Trihalomethane Removal and Re-Formation in Spray Aeration Processes Treating Disinfected Groundwater
… drinking water including bromodichloromethane, bromoform, dibromochloromethane, chloroform. The study was conducted using finished bulk water samples collected from two different water treatment facilities (WTFs) located in Oviedo and Babson Park, Florida. Both treatment plants treat …
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Explore the Formation of Triplet Nitrene - A Potential Intermediate for Building Organic Magnets
… photolysis of 3-Phenyl-2-Methyl-2H-Azirine in bromoform yields benzaldehyde and 1-bromo-1-phenylpropan-2-one. However, photolysis of 2-Phenyl-3-Methyl-2H-Azirine in acetonitrile yields two dimers exo-2,6-dimethyl-4,5-diphenyl-1,3-diazabicyclo[3.1.0]hex-3-ene and …
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The use of physical and chemical techniques in the identification of Tephera (volcanic ash) in the North Island, New Zealand
… techniques using solutions of acetone in bromoform. The natural variation in density exceeded the precision of the technique, but in spite of this the method was shown to have some application in the solution of tephrostratigraphic problems. (c) Magnetic properties: Simple methods based on …