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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"METHYL BROMIDE"”.
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Carbon halogen distances in methyl chloride and methyl bromide
Thesis (M.S.)--Michigan State University. Dept. of Chemistry, 1964
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Food Safe Alternatives to Methyl Bromide in Country Ham Production
… salable product, as well as regulatory concerns. Methyl bromide, a chemical fumigant used to control mite populations, is damaging to stratospheric ozone and will no longer be available. Presently, no alternative control measure has been approved to combat the ham mite; therefore, it is essential …
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Bromide residues in tissues from rats maintained on diets fumigated with methyl bromide
The effect(s) of bromide residues in rat diets on tissue bromide accumulations, organ size, growth rate and physical activity were studied. In Experiment 1, the treatment groups were fed diets containing 290, 600 and 1177 ppm bromide, respectively. The control group received 36 ppm from untreated …
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Managing Weeds and Soilborne Pests with Fumigant and Non-Fumigant Alternatives to Methyl Bromide
Methyl bromide (MBr) was widely used as a soil fumigant to manage soilborne pests in plasticulture vegetable production; however, it has been banned by the United Nations Environment Programme. Alternatives to MBr must be implemented to sustain fresh market tomato productivity. Possible MBr …
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Terrestrial sources and sinks of atmospheric methyl bromide : three-dimensional modeling of tropospheric abundance and sensitivities
Current estimates of methyl bromide surface fluxes are inconsistent with the observed tropospheric mole fractions (9 to 10 ppt, globally averaged) and the calculated atmospheric lifetime (1.7 ± 0.2 years), with mid-range estimates of sinks exceeding sources by at least 50 Gg y-I. Given the …
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Studies on the toxicity of phosphine and methyl bromide to four moth pests of stored products with special emphasis of diapause
… larvae of E. elutella were tolerant to methyl bromide, requiring concentration time (CT) products for 99% kill of 281 and 164 mg h/1 at 15 and 25 ºC respectively. Diapausing larvae of P. interpunctella required CT products of 225 and 67 mg h/1 at 10 and 25°C respectively for 99% kill. In …
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Novel methods of fumigating Australian wildflowers
… just prior to export is a major one. At present methyl bromide or Pestigas®-Insectigas® (mixtures of pyrethrum in carbon dioxide and dichlorvos in carbon dioxide respectively) combinations are available to exporters. However, methyl bromide will be phased out by the year 2005. On the other hand, …
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Importer Preferences and Opinions on Vacuum and Steam Treatment Technology for Hardwood Logs Export
… from chemical-based treatments, such as methyl bromide, to a vacuum and steam treatment for hardwood log exports. Our investigation focuses on understanding the barriers to the adoption of this new technology, including industry awareness and perception, regulatory framework challenges, …
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Methods for management of Tyrophagus putrescentiae (Schrank) (Sarcoptiformes: Acaridae) in dry-cured ham facilities
… (Sarcoptiformes: Acaridae) with the fumigant methyl bromide. Developing feasible alternatives to methyl bromide is necessary due to the phase out of methyl bromide. The effectiveness of food-safe compounds for preventing infestations of T. putrescentiae on dry-cured hams was evaluated by …
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The adsorption of sulfur and halogen containing materials on nickel studied by X-ray photoelectron spectroscopy and thermal desorption spectroscopy
The chemical adsorption and reaction of methyl fluoride, methyl chloride, methyl bromide, methyl iodide, methyl sulfide, dimethyl sulfide, dimethyl disulfide, and bis(trifluoromethyl) disulfide on clean, polycrystalline nickel surface (at 25°C) were investigated using an X-ray photoelectron …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… were also conducted to assess the emission of methyl halides from crop plants. Methyl halide results from OP3 contradict current assumptions of a strong source from tropical vegetation. High mixing ratios of methyl chloride and chloroform were observed in the boundary layer over oil palm …
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Tropospheric composition of organohalogens and alkyl nitrates: tropical and temperate case studies
… were also conducted to assess the emission of methyl halides from crop plants. Methyl halide results from OP3 contradict current assumptions of a strong source from tropical vegetation. High mixing ratios of methyl chloride and chloroform were observed in the boundary layer over oil palm …
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Investigation of Inorganic Stratospheric Bromine using Balloon-Borne DOAS Measurements and Model Simulations
… trend in organic bromine precursors (halons and methyl bromide) can account for. This discrepancy, the non-zero amount of inorganic bromine observed around the tropopause and the rapid increase above the tropopause, all indicate that short-lived organic bromine source gases have to be taken into …
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The Interaction of Simple Gases with Hot Metal Filaments
The interaction of iodine, methyl bromide, methyl cyanide and methyl iodide with tantalum, tungsten, molybdenum and platinum filaments has been studied in a magnetron system. The interaction of two of these compounds, iodine and methyl iodide, with tantalum filaments has also been studied in an …
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Biological wastes as plant growth substrate amendments
… of which the most effective fumigants e.g. methyl bromide, are being withdrawn form use. Chitin-containing crustaceans shellfish waste was investigated as a selective growth substrate amendment in the field, in glasshouse and in storage trials against Sclerotinia disease of Helianthus …
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The Expression of Matrix Metalloproteinase-9 and -2 in Olfactory Injury and Recovery
… injury models: nerve transection (NTx), methyl bromide gas (MeBr) exposure, and nerve transection with Teflon barrier (NTx-TB). Each injury model represents a different degree of olfactory injury and neuronal recovery. In NTx, sensory axons are lesioned, leading to neuronal degeneration …
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Soil solarization and soil additives as alternatives to preplant fumigation in annual plasticulture strawberry production
… as they are susceptible to numerous pests. Methyl bromide, the colorless, odorless gas, was the chosen fumigant for growers until it was classified as an ozone-depleting substance and its use was gradually restricted and legally phased in 2015. Fumigant use has constraints and thus research …
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Host Plant Resistance in Strawberries to Anthracnose and Colonization of Crown and Root Tissue by Verticillium dahliae and Macrophomina phaseolina
… dahliae. </em>With the phaseout of methyl bromide, host resistance and an understanding of host-pathogen interactions can play an important role in control of these diseases.</p> <p>A two-year study was conducted in order to evaluate host resistance of anthracnose in 105 cultivars …
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Investigating Management Alternatives for Southern Blight on Vegetables in the mid-Atlantic United States
… results. Moreover, with the phase-out of methyl bromide, and the high cost and toxicity of other available fumigants, it is necessary to identify effective and economical southern blight management alternatives. Therefore, the objectives of this research were to 1) evaluate the effect of …
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