Global ETD Search
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 12 of 12 for “"Size fractionation"”.
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Size fractionation of bacterial functional diversity within soils
BIOLOGRTM GN and GP microtitre plates were used to compare functional diversity of large (>0.45 mum, LC) and small (<0.45 mum, SC) cells within A and B horizons of cultivated and forested Guernsey silt-loam soil without enrichment and following enrichment in dilution culture. Without enrichment, SC …
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Characterization and treatment of organic matter, UV quenching substances, and organic nitrogen in landfill leachates
… age, location, and on-site treatment processes. Size fractionation utilizing microfiltration (MF) and ultrafiltration (UF) was conducted in conjunction with TOC, nitrogen species, and UV254 absorbance analysis to determine the characteristics of organic constituents present in landfill leachate. …
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A study of the dissolution of atmospherically derived trace metals into North Atlantic seawater
… ultrafiltration provided unique insight into the size fractionation (colloidal 0.02 – 0.4 μm; soluble < 0.02 μm) of dissolved aerosol trace metals and showed Fe and Pb were mostly colloidal (77 – 98% colloidal), Mn and Co were mostly soluble (0 – 48% colloidal) and Ni showed a mixed profile (6 – …
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A novel cough aerosol sampling device for sputum-scarce individuals with tuberculosis
… of the patient based on their expelled aerosol sizes. This is because smaller respiratory droplets can travel to the smallest structures of the lung and are more likely to cause infection. CASS is a useful technology in field sampling in place of sputum sampling. However current systems are …
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Influence of protozoan grazing on the marine geochemistry of particle reactive trace metals
… importance of protists as consumers of bacterial-sized particles, and to the unique low-pH, enzyme-rich microenvironment of the grazer food vacuole. This thesis examines the role of protozoan grazers in the marine geochemistry of strongly hydrolyzed, particle-reactive trace metals, in particular …
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The biogeochemistry of marine particulate trace metals
… discussed. Lithogenic particle residence times, size-fractionation patterns, Ti-mineral speciation, and relationships to biological aggregation processes are calculated and described. A one-dimensional, size-fractionated, multi-box model that describes lithogenic particle distributions is also …
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Physiological adaptations of microorganisms to high oxygen in two oligotrophic lakes
… than the planktobacteria in Mountain Lake. ATP size fractionation revealed that 39% of ATP biomass was <0.5 Hm in Lake Hoare. Five microbial isolates were selected from Lake Hoare by growth under very high oxygen (=VHO, 4.6x in situ HDO, 55 lb in⁻² of added oxygen). One isolate was selected …
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Purification and characterization of a selective growth regulator for human myelopoietic progenitor cells
… cellular lysates, followed by FPLC molecular size fractionation and/or preparative SDS-PAGE. The myelopoietic activity was located within a30-35 kDa molecular weight fraction (P30), and the P30 fraction was consistently found to be selective in its inhibition of normal myeloid progenitors, …
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Mineralogical, Chemical, and Isotopic (Sr, Pb) Composition of Atmospheric Mineral Dusts in an Ombrotrophic Peat Bog, Southern South America
… transported through the atmosphere, grain size fractionation during transport, and their possible source areas (PSAs). To date, no peat bog records of atmospheric dust depositions in southern South America have been reported. Therefore, the major and trace elements, and mineralogical and …
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Management strategy of landfill leachate and landfill gas condensate
… humic or fulvic acids. It was found that the size distribution of the three fractions follows: HA > FA > Hpi. This indicates that membrane separation following biological treatment is a promising technology for the removal of humic substances from landfill leachates. Leachate samples treated …
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Development and application of computational tools for metabolic engineering
… for this application. 200 linker sets with sizes from 10 to 50 with high efficiency and fidelity were found and reported to be used to achieve high efficiency in Golden Gate assembly. These optimized linkers were also used to achieve scar-less Golden Gate assembly and BsaI removal. In this …
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Estudio de las interacciones microbianas de comunidades planctónicas en gradientes ambientales
Las comunidades microbianas juegan un papel crucial en los ciclos biogeoquímicos en la naturaleza. El fitoplancton y el bacterioplancton están en la base de la red alimentaria microbiana en los sistemas acuáticos, siendo el principal productor y descomponedor de carbono orgánico, respectivamente. …