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Showing 1 to 20 of 22 for “"Most Probable Number"”.

  1. Six-month field monitoring of point-of-use ceramic water filter by using H₂S paper strip most probable number method in San Francisco Libre, Nicaragua

    Hwang, Rebeca Eun Young, 1979-Massachusetts Institute of Technology2003

    … by using hydrogen sulfide (H2S) Paper Strip Most Probable Number (H2S MPN) showed that an average of 80.4% of the sample population had less than 2.2 H2S producing colonies per 100 mL after filtration through the PFP filter. Six percent of the visited households had more than 16 CFU/100 mL …

    mit Repository record

  2. Υγιεινολογικός έλεγχος των πόσιμων υδάτων του γεωγραφικού διαμερίσματος Ηπείρου

    Maipa-Stogianni, Vassiliki, Μάϊπα-Στογιάννη, ΒασιλικήUniversity of Ioannina1990

    … of Epirus were examined. The techniques of Most Probable Number and the Membrane filtration were used for the laboratory examination. The indentification of the bacteria was performed using the Enterotube II (Roche). The water samples were collected from spring, wells, water reservoirs, …

    greece Repository record

  3. Degradation of tertiary butyl alcohol by a Pseudomonas sp. isolated from groundwater

    Chadduck, James B.Virginia Polytechnic Institute and State University1987

    … (50 ft. deep) at a petroleum refinery. The most probable number (MPN) of TBA degrading microorganisms was 4.9 x 10³ organisms/g (dry wt) of subsurface soil. Pristine subsurface soils, which did not have a history of petroleum contamination, had MPNs of < 2 TBA degrading organisms/g (dry wt) …

    vt Repository record

  4. An evaluation of a modified membrane filter procedure for enumerating stressed fecal coliforms in chlorinated sewage effluents

    Clark, Steven PaulVirginia Polytechnic Institute and State University1977

    … fermentation technique that yields the most probable number (MPN), the standard MF technique (SF-MF), and a modified MF technique (IF-MF) which consisted of a lactose overlay and a 5-hour incubation period at 44.5°C. A statistical analysis of the data showed that the means of the …

    vt Repository record

  5. Microbial risk assessment for recreational use of the Kranji Reservoir, Singapore

    Dixon, Cameron ChaffeeMassachusetts Institute of Technology2009

    … analyzed for Enterococci concentrations using a most probable number method. The measured geometric mean concentrations found during the field campaign were 13.3 Enterococci colony forming units (CFU) per 100 ml water and 1400 Enterococci CFU per gram sediment. Based on the strengths and …

    mit Repository record

  6. Microbial risk assessment for recreational use of the Kallang Basin, Singapore

    Park, Allison (Allison Minjung)Massachusetts Institute of Technology2014

    … then analyzed for Enterococci and E. coli using most-probable-number methods. Adenovirus was analyzed by Liu (2014) using quantitative polymerase chain reaction. Based on the Wiedenmann et al. (2006) statistics-based risk model, no-observed-adverse-risk levels or guideline geometric-mean levels …

    mit Repository record

  7. Quantifying Potential Sources of Microbial Contamination in Household Drinking Water Samples

    Allevi, Richard PaulVirginia Tech2012

    … (www.idexx.com) defined substrate method for most probable number (MPN) of EC and TC per 100 mL of water. Of the 538 samples collected, 41% (n=221) were positive for TC and 10% (n=53) for EC. Chemical parameters were not statistically predictive of microbial contamination. Well depth, water …

    vt Repository record

  8. Characterization of redox conditions in a petroleum contaminated aquifer: Implications for bioremediation potential

    Spain, Jackson M.Virginia Tech2002

    … degrade BTEX, Fe-reduction did occur, and most probable number (MPN) counts showed that added Fe(III) increased numbers of Fe-reducers in the microcosms. Methane production in microcosms constructed from sediment near the source area was ~5 times lower than levels produced by the mid-plume …

    vt Repository record

  9. Identification des facteurs environnementaux responsables de la présence de Campylobacter Jéjuni dans les eaux de surface de l'Estrie (Québec)

    Bonfils, DjoanUniversité de Sherbrooke2012

    … quantity of CJ in water was estimated using the Most Probable Number method (MPN). The 32 sampling sites were linked to their catchment area; 10 of them were excluded from the analysis, because their hydrographic basin was not independent from the other sites. For each site, the following …

    sherbrooke Repository record

  10. Abundance, Distribution, and Genetic Variation of the Non-Native Red Claw Crayfish (Cherax Quadricarinatus) Recently Introduced to Puerto Rico

    Macias, Nicholas A.2015

    … using a Catch-Per-Unit-Effort approach (the number of individuals per trapnight ~24hrs) with a Cidra being the highest (2.20). A length-mass relationship developed a power equation where Biomass (M) is predicted by taking Standard Carpace Length (SCL) to the power <em>b</em>= 3.4451<em> …

    gsu Repository record

  11. Effectiveness of Windrow Composting Methodology in Killing a Thermo-Tolerant Species of Salmonella During Mortality Composting

    Myers, Spencer Gabriel2019

    … and processed for multiple tube analysis and most probable number. Samples were also partitioned for a viability qPCR with propidium monoazide (PMA) to compare to the classic techniques. Using these methods we were then able to track and produce thermal death time data for <em>S. senftenberg …

    calpoly Repository record

  12. Adapting Consumer Report's product evaluation methods for particle removal, gravity non-electric and reverse osmosis water filters in the Indian marketplace

    Liu, Shuyue, S.M. Massachusetts Institute of TechnologyMassachusetts Institute of Technology2015

    … the concentration of E. coli was 10⁵ to 10⁶ MPN (Most Probable Number)/100mL. The comparative testing attributes that were evaluated include: E.coli removal, turbidity removal, TDS removal, clean water flow rate, RO % recovery, and filter lifetime with the end-of-life defined as when flow rate <1 …

    mit Repository record

  13. Detection of Giardia lamblia and Cryptosporidium parvum in the eastern oyster (Crassostrea virginica) harvested from the Great Bay Estuary

    Stowell, Kim Marie

    … as approved for shellfish harvesting based on most-probable-number water analysis and one site was closed to shellfish harvesting, due to high fecal coliform counts (>70 fecal coliforms/100 ml water). Each site sample was processed and analyzed using the multiplex PCR and nested PCR procedure. …

    unh-thes Repository record

  14. Isolation, growth and epidemiology of campylobacter jejuni / coli

    Bolton, Frederick JamesLancashire Polytechnic1985

    … four other media showed that the SBA gave the most isolations and was the most selective. Enrichment culture using SBEB achieved additional isolations. The SBEB was used in a most probable number (MPN) method which detects as few as 10 campylobatters/tOO ml of water. A glass microfibre …

    cent-lancashire Repository record

  15. Storage of Pine Tree Substrate Influences Plant Growth, Nitrification, and Substrate Properties

    Taylor, Linda LeaVirginia Tech2011

    … was also collected from select treatments for Most Probable Number assays to estimate density of nitrifying microorganisms, and for chemical and physical property analyses. Pour-through extracts were collected from fallow containers at 0, 2, and 4 weeks, and from marigold containers at harvest …

    vt Repository record

  16. Variations in the Oxidative Rates of Nitrosomonas europaea in Coke-Plant Activated Sludge.

    Martin, Randy Harlis

    … purpose of providing reliable estimates of the number of nitrifiers in coke-plant mixed liquor. The specificity of the labelled antibody and the accuracy of the technique were assessed with adequate controls.Results obtained from the FAb technique indicate that coke-plant mixed liquor contains …

    uab Repository record

  17. Using Conservative and Biological Tracers to Better Understand the Transport of Agricultural Contaminants from Soil Water through the Epikarstic Zone

    Ham, Brian

    … coliform reached its first peak of 2,755 MPN (most probable number of viable cells per 100 mL of water) 90 minutes prior to the dye peak and a second peak of 2,481 MPN occurred 15 minutes prior to the dye peak. These results showed that solutes travelling through the soil and epikarst follow …

    wku-diss Repository record

  18. Environment risk assessment for toxic chemicals and genetically-engineered microorganisms: a microcosm approach

    Scanferlato, Vjera SostarecVirginia Tech1990

    … Selective media, antibiotic resistance, and most probable number analysis were used to enumerate genetically-engineered E. carotovora in environmental samples. This technique was able to detect as few as 1 to 10 target cells/10 g soil. In thermally-perturbed aquatic microcosms, …

    vt Repository record

  19. Groundwater transport of Escherichia coli bacteria to open surface waters on Virginia's Coastal Plain: a GIS approach

    Schima, Francis JosephVirginia Tech1993

    … how much these factors affected the bacteria most probable number (MPN) concentration levels. Subsets of the data consisting of heavy rain events, low tide and high tide were analyzed which had geometric mean bacteria MPN concentrations of 16.1 fecal coliforms (FC) / 100 mL, 9.4 FC / 100 mL, …

    vt Repository record

  20. Βακτηριακή & ιογενής ρύπανση των οστρακοειδών

    Τσιμπουξή, Ανδρομάχη2008

    Στα πλαίσια αυτής της διδακτορικής εργασίας μελετήθηκαν οι εμπορικά σημαντικότερες περιοχές καλλιέργειας και συγκομιδής οστρακοειδών του Ελλαδικού χώρου. Κατά τη διάρκεια περιόδου 18 μηνών πραγματοποιήθηκε μηνιαία συλλογή δειγμάτων στρειδιών (Οstrea edulis) και μυδιών (Mytilus galloprovincialis), …

    patras-thes Repository record

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